Filtering equipment for drainage tube of breathing machine

Abstract

The utility model relates to breathing machine drainage tube filtering equipment which comprises a connecting part and a filtering plate, a connecting cavity is formed in the connecting part, the upper end of the connecting cavity is used for being connected with the second end of a first tube section, the lower end of the connecting cavity is used for being connected with the second end of a second tube section, and two inserting openings are further formed in the connecting part. The insertion openings are communicated with the outer surfaces of the connecting cavity and the connecting part, the two insertion openings are oppositely arranged, the filter plate is located in the connecting cavity and used for filtering gas flowing through the connecting cavity, the two ends of the filter plate are located in the two insertion openings respectively, and the filter plate is matched with the insertion openings. In the whole process of replacing the filter plate of the breathing machine drainage tube filter equipment, the filter plate is used for filtering gas exhaled by a patient, namely, in the whole process of replacing the filter plate, the gas exhaled by the patient can be continuously filtered, so that the breathing effect of the breathing machine drainage tube filter equipment is improved. And the influence of the gas exhaled by the patient on the environment and the risk of cross infection can be further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a filtering device for a ventilator drainage tube. Background Art

[0002] In modern clinical medicine, as an effective means to artificially replace the function of autonomous ventilation, ventilators have been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgeries, respiratory support treatment, and first aid resuscitation, and play a very important role in the field of modern medicine.

[0003] When existing ventilators are used clinically, the gas exhaled by patients is drained to the air through the drainage tube. In some special cases, such as in the case of infectious disease patients or in an occasion that requires a highly sterile environment, a filter may be installed on the drainage tube to reduce the impact of the gas exhaled by patients on the environment and the risk of cross-infection.

[0004] Although the existing filters on the drainage tube have the function of filtering the gas exhaled by patients, during the process of replacing the filter element, the filtration of the gas exhaled by patients will be interrupted, resulting in some of the gas exhaled by patients using the ventilator being discharged into the air without being filtered. Content of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a filtering device for a ventilator drainage tube to solve the technical problem that during the process of replacing the filter element of the existing filter, the filtration of the gas exhaled by patients will be interrupted, resulting in some of the gas exhaled by patients using the ventilator being discharged into the air without being filtered.

[0006] The utility model is realized through the following technical solutions:

[0007] A filtering device for a ventilator drainage tube, the drainage tube includes a first pipe section and a second pipe section, the first end of the first pipe section is connected to a ventilator mask, the first end of the second pipe section is connected to a ventilator, and it includes a connecting part and a filter plate. A connecting cavity is formed in the connecting part. The upper end of the connecting cavity is used to connect the second end of the first pipe section, and the lower end of the connecting cavity is used to connect the second end of the second pipe section. Two sockets are also formed on the connecting part, and the sockets communicate the connecting cavity and the outer surface of the connecting part. The two sockets are arranged oppositely. The filter plate is located in the connecting cavity, and the filter plate is used to filter the gas flowing through the connecting cavity. Both ends of the filter plate are respectively located in the two sockets, and the filter plate is adapted to the sockets.

[0008] It is further defined that it also includes a first guide bar and a second guide bar, the first guide bar and the second guide bar are both located in the connecting cavity, the two ends of the first guide bar are fixed on the connecting portion at positions corresponding to the lower edges of the two sockets respectively, the upper side surface of the first guide bar abuts against the lower side surface of the filter plate, the two ends of the second guide bar are fixed on the connecting portion at positions corresponding to the upper edges of the two sockets respectively, and the lower side surface of the second guide bar abuts against the upper side surface of the filter plate.

[0009] It is further defined that the filter plate includes a plate body, a filter element and a fixing portion, the plate body is located in the connecting cavity, the two ends of the plate body are respectively located in the socket, the plate body is adapted to the socket, a through hole is formed in the middle of the plate body, the filter element closes the through hole, and the fixing portion is used to detachably fix the filter element to the plate body.

[0010] It is further defined that the filter element is made of a flexible material; the upper side surface of the plate body is recessed downward to form a receiving groove adapted to the filter element, the filter element is located in the receiving groove, and the through hole is located on the bottom wall of the receiving groove; the fixing portion includes a pressure plate, the pressure plate is located in the receiving groove, the lower side surface of the pressure plate presses the filter element, and the upper side surface of the pressure plate abuts against the second guide strip.

[0011] It is further defined that the upper side surface of the plate body is recessed downward at positions corresponding to the two ends of the pressure plate to form limiting grooves, the limiting grooves are connected to the accommodating grooves, the limiting grooves are adapted to the pressure plate, and the two ends of the pressure plate are respectively located in the corresponding limiting grooves.

[0012] It is further defined that both ends of the pressing plate are formed with inclined surfaces, one end of the inclined surface close to the middle of the pressing plate is connected to the upper side surface of the pressing plate, and one end of the inclined surface away from the middle of the pressing plate is lower than the upper side surface of the pressing plate.

[0013] It is further defined that it also includes two tapes, the two tapes are adhered to the outer surface of the connecting part, the two tapes are respectively covered on the two sockets, and the tapes are used to seal the sockets.

[0014] Further defined, the connecting part includes a connecting part body, a first connecting pipe and a second connecting pipe. The connecting cavity is formed in the connecting part body. The lower end of the first connecting pipe is fixedly connected to the upper end of the connecting part body and communicates with the connecting cavity. The upper end of the first connecting pipe is adapted to the inner cavity of the second end of the first pipe section, and the upper end of the first connecting pipe is used for plugging and fixing into the second end of the first pipe section. The upper end of the second connecting pipe is fixedly connected to the lower end of the connecting part body and communicates with the connecting cavity. The lower end of the second connecting pipe is adapted to the inner cavity of the second end of the second pipe section, and the lower end of the second connecting pipe is used for plugging and fixing into the second end of the second pipe section.

[0015] The beneficial effects of the present utility model are as follows:

[0016] In the whole process of replacing the filter plate of the ventilator drainage tube filtering device of the present utility model, the filter plate filters the gas exhaled by the patient. That is, in the whole process of replacing the filter plate, the gas exhaled by the patient can be continuously filtered, which can further reduce the impact of the gas exhaled by the patient on the environment and the risk of cross-infection.

[0017] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent description, and to some extent, they will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a cross-sectional view of the present utility model;

[0020] Figure 3 is a cross-sectional view of the present utility model when the filter plate and the tape are omitted;

[0021] Figure 4 is a schematic exploded view of the filter plate of the present utility model;

[0022] Figure 5 and Figure 6 is a usage state diagram of the present utility model;

[0023] Figure 7 and Figure 8 is a schematic connection structure diagram of the present utility model with the first pipe section and the second pipe section.

[0024] In the figure: 1. Connecting part; 101. Connecting part body; 102. First connecting pipe; 103. Second connecting pipe; 2. Filter plate; 201. Plate body; 2011. Through hole; 2012. Accommodating groove; 2013. Limiting groove; 202. Filter element; 203. Fixing part; 3. Connecting cavity; 4. Socket; 5. First guiding strip; 6. Second guiding strip; 7. Adhesive tape; 8. First pipe section; 9. Second pipe section; Detailed implementation manners

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the above description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "one side", "the other side", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of the present utility model is normally placed. It is only for the convenience of describing the present utility model 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 to the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0029] In addition, terms such as "the same" do not mean that the components are absolutely the same, but there may be slight differences. The term "vertical" only means that the positional relationship between components is more vertical relative to "parallel", and does not mean that the structure must be completely vertical, but can be slightly inclined.

[0030] Please refer to Figures 1-8, the present utility model provides a technical solution: a filtering device for a ventilator drainage tube. The drainage tube includes a first tube section 8 and a second tube section 9. The first end of the first tube section 8 is connected to a ventilator mask, and the first end of the second tube section 9 is connected to a ventilator. It includes a connecting part 1 and a filter plate 2. A connecting cavity 3 is formed inside the connecting part 1. The upper end of the connecting cavity 3 is used to connect the second end of the first tube section 8, and the lower end of the connecting cavity 3 is used to connect the second end of the second tube section 9. Two sockets 4 are also formed on the connecting part 1. The sockets 4 communicate the connecting cavity 3 and the outer surface of the connecting part 1. The two sockets 4 are arranged oppositely. The filter plate 2 is located inside the connecting cavity 3. The filter plate 2 is used to filter the gas flowing through the connecting cavity 3. Both ends of the filter plate 2 are respectively located inside the two sockets 4, and the filter plate 2 is adapted to the sockets 4.

[0031] The initial state of the filtering device for the ventilator drainage tube of the present utility model is: the filter plate 2 is located inside the connecting cavity 3, and both ends of the filter plate 2 are located inside the two sockets 4.

[0032] Before using the filtering device for the ventilator drainage tube of the present utility model, connect the first end of the first tube section 8 to a ventilator mask, connect the first end of the second tube section 9 to a ventilator, connect the upper end of the connecting cavity 3 to the second end of the first tube section 8, and connect the lower end of the connecting cavity 3 to the second end of the second tube section 9 (please refer to Figure 7 and Figure 8 ), then the filtering device for the ventilator drainage tube of the present utility model can be connected to the drainage tube for use.

[0033] When using the filtering device for the ventilator drainage tube of the present utility model: the gas exhaled by the patient passes through the ventilator mask, the first tube section 8, the part of the connecting cavity 3 above the filter plate 2, the filter plate 2, the part of the connecting cavity 3 below the filter plate 2, the second tube section 9, and the ventilator in sequence and is then discharged into the air. When the gas exhaled by the patient passes through the filter plate 2, the filter plate 2 can filter the gas exhaled by the patient to reduce the impact of the infectious virus carried in the gas exhaled by the patient on the environment and the risk of cross-infection.

[0034] After the filtering device for the ventilator drainage tube of the present utility model is used for a long time, the filtering effect of the filter plate 2 weakens, and the filter plate 2 needs to be replaced. When replacing the filter plate 2, the replacement personnel align one end of the new filter plate 2 with one of the sockets 4 and abut it against one end of the old filter plate 2 (please refer to Figure 5 shown), push the new filter plate 2 into the connecting cavity 3. During the movement of the new filter plate 2, it pushes the old filter plate 2 (please refer to Figure 6As shown, the old filter plate 2 moves towards the other socket 4 until it completely exits the other socket 4. At this time, the new filter plate 2 is located in the connection cavity 3, and both ends of the new filter plate 2 are respectively located in the two sockets 4.

[0035] During the entire process of replacing the filter plate 2 of the ventilator drainage tube filtering device of the present utility model, the filter plate 2 filters the gas exhaled by the patient. That is, during the entire process of replacing the filter plate 2, it can continuously filter the gas exhaled by the patient, and can further reduce the impact of the gas exhaled by the patient on the environment and the risk of cross-infection.

[0036] In this embodiment, it further includes a first guiding strip 5 and a second guiding strip 6. Both the first guiding strip 5 and the second guiding strip 6 are located in the connection cavity 3. Both ends of the first guiding strip 5 are fixed on the connecting portion 1 at positions corresponding to the lower edges of the two sockets 4 respectively. The upper side surface of the first guiding strip 5 abuts against the lower side surface of the filter plate 2. Both ends of the second guiding strip 6 are fixed on the connecting portion 1 at positions corresponding to the upper edges of the two sockets 4 respectively. The lower side surface of the second guiding strip 6 abuts against the upper side surface of the filter plate 2.

[0037] During the process of inserting the filter plate 2 into the connection cavity 3 through one of the sockets 4, the upper side surface of the first guiding strip 5 abuts against the lower side surface of the filter plate 2, and the lower side surface of the second guiding strip 6 abuts against the upper side surface of the filter plate 2. That is, the filter plate 2 is placed between the first guiding strip 5 and the second guiding strip 6. The first guiding strip 5 and the second guiding strip 6 can play a guiding role in the movement of the filter plate 2, making it easier for the end of the filter plate 2 inserted into the connection cavity 3 to accurately insert into the other socket 4.

[0038] In this embodiment, the filter plate 2 includes a plate body 201, a filter element 202, and a fixing portion 203. The plate body 201 is located in the connection cavity 3. Both ends of the plate body 201 are respectively located in the sockets 4. The plate body 201 is adapted to the sockets 4. A through hole 2011 is formed in the middle of the plate body 201. The filter element 202 closes the through hole 2011. The fixing portion 203 is used to detachably fix the filter element 202 on the plate body 201.

[0039] During the process that the gas exhaled by the patient passes through the filter plate 2 from the part of the connection cavity 3 above the filter plate 2 and enters the part of the connection cavity 3 below the filter plate 2, the gas exhaled by the patient passes through the filter element 202 and the through hole 2011, and the filter element 202 filters the gas entering the part of the connection cavity 3 below the filter plate 2 from the part of the connection cavity 3 above the filter plate 2.

[0040] In this embodiment, the filter element 202 is made of a flexible material; a receiving groove 2012 adapted to the filter element 202 is formed by downward depression on the upper side surface of the plate body 201. The filter element 202 is located in the receiving groove 2012, and the through hole 2011 is located on the bottom wall of the receiving groove 2012; the fixing portion 203 includes a pressing plate. The pressing plate is located in the receiving groove 2012. The lower side surface of the pressing plate presses the filter element 202, and the upper side surface of the pressing plate abuts against the second guiding strip 6.

[0041] Since the filter element 202 is made of a flexible material, the filter element 202 can be compressed to a certain extent in its thickness direction. Before inserting the filter plate 2 into the connecting cavity 3, place the pressing plate at a position corresponding to the second guiding strip 6 on the filter element 202, and then apply a downward pressure to the pressing plate so that the upper side surface of the pressing plate is not higher than the upper side surface of the plate body 201. At this time, the filter plate 2 can be inserted into the connecting cavity 3 through one of the sockets 4.

[0042] When the filter plate 2 is located in the connecting cavity 3, the lower side surface of the pressing plate presses the filter element 202, and the upper side surface of the pressing plate abuts against the second guiding strip 6. With this structure, the pressing plate can press and fix the filter element on the plate body 201, and the fixing portion 203 can fix the filter element 202 to the plate body 201.

[0043] After taking out the filter plate 2 from the connecting cavity 3, the pressing plate can be removed from the upper side surface of the filter element 202, and at this time, the filter element 202 can be removed from the plate body 201.

[0044] In this embodiment, the filter element 202 includes an activated carbon layer, a HEPA filter layer, and a polypropylene sterilization layer arranged in sequence from top to bottom. The gas exhaled by the patient passes through the activated carbon layer, the HEPA filter layer, and the polypropylene sterilization layer in sequence. The activated carbon layer absorbs the water vapor in the gas, the HEPA filter layer filters the viruses carried in the gas, and the polypropylene sterilization layer sterilizes and disinfects the gas.

[0045] In this embodiment, limiting grooves 2013 are formed by downward depression at positions corresponding to both ends of the pressing plate on the upper side surface of the plate body 201. The limiting grooves 2013 communicate with the receiving groove 2012. The limiting grooves 2013 are adapted to the pressing plate, and both ends of the pressing plate are respectively located in the corresponding limiting grooves 2013.

[0046] With this structure, when the pressing plate presses the filter element 202, both ends of the pressing plate are limited in the limiting grooves 2013 to prevent the pressing plate from moving horizontally, so that the pressing plate can press the filter element 202 more stably.

[0047] In this embodiment, inclined surfaces are formed at both ends of the pressing plate. One end of the inclined surface close to the middle of the pressing plate is connected to the upper side surface of the pressing plate, and the end of the inclined surface away from the middle of the pressing plate is lower than the upper side surface of the pressing plate.

[0048] Before inserting the filter plate 2 into the connection cavity 3, place the pressing plate at the position corresponding to the second guiding strip 6 on the filter element 202, and then apply a downward pressure to the pressing plate so that the lower end of the inclined surface is not higher than the upper side surface of the plate body 201. At this time, the filter plate 2 can be inserted into the connection cavity 3 through one of the sockets 4; during the process of aligning one end of the filter plate 2 with the socket 4 and pushing the filter plate 2 into the connection cavity 3, the inclined surface at the end of the pressing plate facing the socket 4 will abut against the upper edge of the socket 4, and the upper edge of the socket 4 will provide a downward acting force to the pressing plate through the inclined surface. During the process of inserting the filter plate 2 into the connection cavity 3, the pressing plate will be gradually pressed downward into the receiving groove 2012 until the upper surface of the pressing plate is flush with the upper surface of the plate body 201. Before inserting the filter plate 2 into the connection cavity 3, there is no need to completely press the pressing plate into the receiving groove 2012, which can reduce the pressure applied to the pressing plate.

[0049] In this embodiment, it further includes two tapes 7. The two tapes 7 are adhered to the outer surface of the connection part 1, and the two tapes 7 respectively cover the two sockets 4. The tapes 7 are used to seal the sockets 4.

[0050] With this structure, sealing the socket 4 with the tape 7 can reduce the possibility that the gas exhaled by the patient escapes from the socket 4 without being filtered. Under the blocking effect of the tape 7, the filter plate 2 is not likely to accidentally fall out of the socket 4. When it is necessary to replace the filter plate 2, just tear the two tapes 7 off the connection part 1.

[0051] In this embodiment, the connection part 1 includes a connection part body 101, a first connection pipe 102, and a second connection pipe 103. The connection cavity 3 is formed in the connection part body 101. The lower end of the first connection pipe 102 is fixedly connected to the upper end of the connection part body 101 and is communicated with the connection cavity 3. The upper end of the first connection pipe 102 is adapted to the inner cavity of the second end of the first pipe section 8, and the upper end of the first connection pipe 102 is used for being inserted and fixed in the second end of the first pipe section 8; the upper end of the second connection pipe 103 is fixedly connected to the lower end of the connection part body 101 and is communicated with the connection cavity 3. The lower end of the second connection pipe 103 is adapted to the inner cavity of the second end of the second pipe section 9, and the lower end of the second connection pipe 103 is used for being inserted and fixed in the second end of the second pipe section 9.

[0052] With this structure, the upper end of the connection cavity 3 can be connected to the second end of the first pipe section 8, the lower end of the connection cavity 3 can be connected to the second end of the second pipe section 9, the second end of the first pipe section 8 can be unplugged from the first connection pipe 102, and the second section of the second pipe section 9 can be unplugged from the second connection pipe 103. Furthermore, the connection part 1 can be removed from the first pipe section 8 and the second pipe section 9 for cleaning and disinfection and then reused, which can save medical costs.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A filtering device for a ventilator drainage tube. The drainage tube includes a first tube section (8) and a second tube section (9). The first end of the first tube section (8) is connected to a ventilator mask, and the first end of the second tube section (9) is connected to a ventilator. It is characterized in that: It includes a connecting part (1) and a filter plate (2). A connecting cavity (3) is formed in the connecting part (1). The upper end of the connecting cavity (3) is used to connect the second end of the first pipe section (8), and the lower end of the connecting cavity (3) is used to connect the second end of the second pipe section (9). Two sockets (4) are also formed on the connecting part (1). The sockets (4) communicate the connecting cavity (3) and the outer surface of the connecting part (1). The two sockets (4) are arranged oppositely. The filter plate (2) is located in the connecting cavity (3). The filter plate (2) is used to filter the gas flowing through the connecting cavity (3). Both ends of the filter plate (2) are respectively located in the two sockets (4), and the filter plate (2) is adapted to the sockets (4). It further includes a first guiding strip (5) and a second guiding strip (6). Both the first guiding strip (5) and the second guiding strip (6) are located in the connecting cavity (3). Both ends of the first guiding strip (5) are fixed on the connecting part (1) at positions corresponding to the lower edges of the two sockets (4). The upper side surface of the first guiding strip (5) abuts against the lower side surface of the filter plate (2). Both ends of the second guiding strip (6) are fixed on the connecting part (1) at positions corresponding to the upper edges of the two sockets (4). The lower side surface of the second guiding strip (6) abuts against the upper side surface of the filter plate (2). It also includes two tapes (7). The two tapes (7) are bonded to the outer surface of the connecting part (1). The two tapes (7) respectively cover the two sockets (4). The tapes (7) are used to seal the sockets (4).

2. The filtering device for a ventilator drainage tube according to claim 1, wherein: The filter plate (2) includes a plate body (201), a filter element (202) and a fixing part (203). The plate body (201) is located in the connecting cavity (3). Both ends of the plate body (201) are respectively located in the sockets (4). The plate body (201) is adapted to the sockets (4). A through hole (2011) is formed in the middle of the plate body (201). The filter element (202) closes the through hole (2011). The fixing part (203) is used to detachably fix the filter element (202) on the plate body (201).

3. The ventilator drainage tube filtering device according to claim 2, characterized in that: The filter element (202) is made of a flexible material; a receiving groove (2012) adapted to the filter element (202) is formed by downward depression on the upper side surface of the plate body (201). The filter element (202) is located in the receiving groove (2012). The through hole (2011) is located on the bottom wall of the receiving groove (2012); the fixing part (203) includes a pressing plate. The pressing plate is located in the receiving groove (2012). The lower side surface of the pressing plate presses the filter element (202), and the upper side surface of the pressing plate abuts against the second guiding strip (6).

4. The filtering device for the ventilator drainage tube according to claim 3, wherein: At positions corresponding to both ends of the pressing plate on the upper side surface of the plate body (201), limiting grooves (2013) are formed by downward depressions. The limiting grooves (2013) communicate with the accommodating grooves (2012). The limiting grooves (2013) are adapted to the pressing plate, and both ends of the pressing plate are respectively located in the corresponding limiting grooves (2013).

5. The ventilator drainage tube filtering device according to claim 3, characterized in that: Both ends of the pressing plate are formed with inclined surfaces. One end of the inclined surface close to the middle of the pressing plate is in contact with the upper side surface of the pressing plate, and the end of the inclined surface away from the middle of the pressing plate is lower than the upper side surface of the pressing plate.

6. The filtering device for a ventilator drainage tube according to claim 1, wherein: The connecting portion (1) includes a connecting portion body (101), a first connecting pipe (102), and a second connecting pipe (103). The connecting cavity (3) is formed in the connecting portion body (101). The lower end of the first connecting pipe (102) is fixedly connected to the upper end of the connecting portion body (101) and communicates with the connecting cavity (3). The upper end of the first connecting pipe (102) is adapted to the inner cavity of the second end of the first pipe section (8), and the upper end of the first connecting pipe (102) is used for being inserted and fixed in the second end of the first pipe section (8). The upper end of the second connecting pipe (103) is fixedly connected to the lower end of the connecting portion body (101) and communicates with the connecting cavity (3). The lower end of the second connecting pipe (103) is adapted to the inner cavity of the second end of the second pipe section (9), and the lower end of the second connecting pipe (103) is used for being inserted and fixed in the second end of the second pipe section (9).

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