Pipeline sealing structure and ventilation treatment equipment

Abstract

The utility model relates to a pipeline sealing structure and ventilation treatment equipment, and relates to the technical field of ventilation treatment equipment. The pipeline sealing structure comprises the sealing unit and the gas pipeline connected with the sealing unit, when the sealing unit is matched with the gas pipeline, the elastic sealing skirt edge can move and deform, and due to the fact that the elastic sealing skirt edge is the skirt edge with the set width, the elastic sealing skirt edge is not prone to deformation. Therefore, surface sealing with a large contact area is formed between the skirt edge with the set width and the surface of the pipe wall in contact with the skirt edge, that is, surface sealing with high sealing reliability can be formed on the circumferential pipe walls of the first pipeline and the second pipeline, and the sealing performance between the first pipeline and the second pipeline is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation therapy, in particular to a pipeline sealing structure and ventilation therapy equipment. Background Art

[0002] Ventilation therapy equipment is a device used for respiratory diseases and related diseases. To provide patients with a better breathing experience, ventilation therapy equipment provides patients with heated and humidified gas. Therefore, the gas provided to the patient generally needs to pass through components such as fans, water tanks and pipelines before it can be sent to the breathing mask for the patient to use. In order to ensure the normal supply of gas, the pipeline needs to ensure airtightness. At present, common pipeline sealing methods such as O-ring sealing methods form a sealing structure with a narrow contact area between two contacting surfaces, such as wire sealing methods. Therefore, there may be leakage points on the circumference of the pipeline, which will cause the seal to fail. Utility Model Content

[0003] The utility model provides a pipeline sealing structure and ventilation treatment equipment, which are used to solve at least one of the above-mentioned technical problems.

[0004] The utility model provides a pipeline sealing structure, which is arranged on a first pipeline and / or a second pipeline and is used for sealing when the first pipeline is connected to the second pipeline. The pipeline sealing structure comprises an elastic sealing skirt arranged on the pipe wall of the first pipeline or the pipe wall of the second pipeline, and the elastic sealing skirt is a skirt with a set width;

[0005] When the first pipeline is connected to the second pipeline, the elastic sealing skirt located between the tube wall of the first pipeline and the tube wall of the second pipeline moves and deforms, so that a seal is formed between the elastic sealing skirt and the tube wall surface in contact with it.

[0006] In one embodiment, the elastic sealing skirt is disposed on the first connection end of the first pipeline or the second connection end of the second pipeline, and extends circumferentially along the inner wall or the outer wall of the first connection end or the second connection end.

[0007] In one embodiment, the number of the elastic sealing skirt is one or more. When the number of the elastic sealing skirt is plural, the plurality of elastic sealing skirts are spaced apart along the axial direction of the first pipeline or the second pipeline.

[0008] In one embodiment, the aperture of the first connecting end portion is greater than or equal to the outer diameter of the second connecting end portion, and when the second connecting end portion is inserted into the first connecting end portion, the elastic sealing skirt is arranged on the inner wall of the first connecting end portion and / or on the outer wall of the second connecting end portion, and the elastic sealing skirt seal is located between the inner wall of the first connecting end portion and the outer wall of the second connecting end portion.

[0009] In one embodiment, the aperture of the second connecting end portion is greater than or equal to the outer diameter of the first connecting end portion, and when the first connecting end portion is inserted into the second connecting end portion, the elastic sealing skirt is arranged on the inner wall of the second connecting end portion and / or on the outer wall of the first connecting end portion, and the elastic sealing skirt seal is located between the inner wall of the second connecting end portion and the outer wall of the first connecting end portion.

[0010] In one embodiment, the elastic sealing skirt includes a fixed end and a free end, the fixed end is fixed on the tube wall of the first pipeline or the tube wall of the second pipeline, and the free end extends along an arc curve in a direction away from the fixed end.

[0011] In one embodiment, the free end extends obliquely toward the axial center direction of the one with a larger inner diameter between the connecting end of the first pipeline and the connecting end of the second pipeline.

[0012] In one embodiment, the free end includes a middle section and an end section, and the middle section is close to the side of the fixed end. When the first pipeline is connected to the second pipeline, the elastic sealing skirt moves and deforms, so that at least the middle section contacts the pipe wall surface at the corresponding first connecting end or the second connecting end to form a contact seal.

[0013] In one embodiment, the elastic sealing skirt is formed integrally with a tube wall of the first pipeline or the second pipeline.

[0014] In one embodiment, when the first connection end portion and the second connection end portion are connected, a stop portion protruding outward along its circumference is provided on the outer wall of the one with the smaller aperture, and the stop portion is used to limit the axial connection between the first connection end portion and the second connection end portion.

[0015] In one embodiment, the thickness of the middle section and the end section gradually decreases in a direction from the fixed end to the free end.

[0016] According to the second aspect of the utility model, the utility model provides a ventilation therapy device, including the above-mentioned pipeline sealing structure, a main unit and a water tank assembly, the first pipeline is arranged on the water tank assembly, the second pipeline is arranged on the main unit, when the first pipeline is connected to the second pipeline, a fluid-connected air circuit is formed between the main unit and the water tank assembly, and the pipeline sealing structure seals the air circuit.

[0017] Compared with the prior art, the advantage of the utility model lies in that, when the first pipeline is connected to the second pipeline, the elastic sealing skirt can move and deform. Since the elastic sealing skirt is a skirt with a set width, a surface seal with a larger contact area is formed between the skirt with the set width and the pipe wall surface in contact with it, that is, a surface seal with higher sealing reliability can be formed on the circumferential pipe walls of the first pipeline and the second pipeline, thereby improving the sealing performance between the first pipeline and the second pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0019] Figure 1 It is an exploded view of the pipeline sealing structure in the embodiment of the utility model when it is installed on the ventilation treatment equipment;

[0020] Figure 2 yes Figure 1 A perspective view of the intake seal assembly shown;

[0021] Figure 3 yes Figure 1 A top view of the intake seal assembly is shown;

[0022] Figure 4 yes Figure 3 Cross-sectional view at MM;

[0023] Figure 5 yes Figure 1 A perspective view of the outlet seal assembly shown;

[0024] Figure 6 yes Figure 1 A top view of the outlet seal assembly shown;

[0025] Figure 7 yes Figure 6 Sectional view at NN;

[0026] Figure 8 yes Figure 1 A stereoscopic view of the outlet seal assembly shown with a heating pipeline installed;

[0027] Fig. 9 yes Figure 1A top view of the ventilation therapy device shown;

[0028] Fig.10 yes Fig. 9 Cross-sectional view at PP;

[0029] Fig.11 yes Fig.10 A magnified view at point A;

[0030] Fig.12 yes Fig. 9 Section view at QQ;

[0031] Fig.13 yes Fig.12 Enlarged view at B;

[0032] Fig.14 The utility model is Fig.11 A corresponding structural schematic diagram of another embodiment;

[0033] Fig.15 The utility model is Fig.11 A corresponding structural schematic diagram of another embodiment;

[0034] Reference numerals:

[0035] 1. Water tank assembly; 2. Main unit; 3. Second pipeline; 4. First pipeline; 5. Elastic sealing skirt;

[0036] 21. First mounting slot; 22. Second mounting slot;

[0037] 31. Second air inlet pipe; 32. Second air outlet pipe;

[0038] 311, air intake gap; 312, first limiting groove; 313, air intake cavity; 314, first positioning platform; 315, air pressure test pipeline; 316, first axial end face;

[0039] 321, air outlet gap; 322, second limiting groove; 323, air outlet cavity; 324, second positioning platform; 325, temperature measurement channel; 326, temperature measurement element; 327, heating pipeline; 328, active air outlet; 329, second axial end face;

[0040] 41. a first air inlet pipe; 42. a first air outlet pipe;

[0041] 411, a first stopper; 421, a second stopper;

[0042] 51. First elastic sealing skirt; 52. Second elastic sealing skirt; 511. Fixed end; 512. Free end; 5121. Middle section; 5122. End section. DETAILED DESCRIPTION

[0043] The utility model will be further described below in conjunction with the accompanying drawings.

[0044] like Figure 1-Figure 15 As shown, according to the first aspect of the present invention, the present invention provides a pipeline sealing structure, which can be applied to a device having a gas and / or liquid flow path and requiring an airtight seal (such as a ventilation therapy device, etc.).

[0045] The pipeline sealing structure of the utility model is arranged on the first pipeline 4 and / or the second pipeline 3, and is used for sealing when the first pipeline 4 and the second pipeline 3 are connected.

[0046] Specifically, the pipeline sealing structure includes an elastic sealing skirt 5 arranged on the tube wall of the first pipeline 4 or the tube wall of the second pipeline 3. The elastic sealing skirt 5 is a skirt with a set width. When the first pipeline 4 is connected to the second pipeline 3, the elastic sealing skirt 5 located between the tube wall of the first pipeline 4 and the tube wall of the second pipeline 3 is squeezed and deformed. Since the elastic sealing skirt 5 is a skirt with a certain width, when the elastic sealing skirt 5 is squeezed and deformed, a contact surface seal is formed between the skirt with the set width and the tube wall surface in contact with it, so that a surface seal can be formed on the circumferential tube wall of the first pipeline 4 and the second pipeline 3, thereby improving the sealing performance between the first pipeline 4 and the second pipeline 3. More specifically, the elastic sealing skirt 5 is arranged on the first connection end of the first pipeline 4 or the second connection end of the second pipeline 3, and extends circumferentially along the inner wall or outer wall of the first connection end or the second connection end.

[0047] It should be noted that the predetermined width mentioned herein refers to the distance between the end of the elastic sealing skirt 5 and the tube wall of the first pipeline 4 or the tube wall of the second pipeline 3 .

[0048] Among them, the matching mode of the second pipeline 3 and the first pipeline 4 can be, for example, that the first pipeline 4 is inserted into the second pipeline 3 from one side of the second pipeline 3 and connected with the second pipeline 3 by plugging. At this time, the aperture of the second connection end of the second pipeline 3 is greater than or equal to the outer diameter of the first connection end of the first pipeline 4, and the first connection end of the first pipeline 4 can be inserted into the second connection end of the second pipeline 3. The insertion direction of the first pipeline 4 can be its axial direction. Therefore, it can be understood that the inner wall of the second pipeline 3 is the first matching surface, the outer wall of the first pipeline 4 is the second matching surface, the second pipeline 3 and the first pipeline 4 have overlapping space in the axial direction (there can be a certain gap between the inner wall of the second pipeline 3 and the outer wall of the first pipeline 4), and the elastic sealing skirt 5 can be arranged on the inner wall of the second connection end of the second pipeline 3 and / or the outer wall of the first connection end of the first pipeline 4, and the elastic sealing skirt 5 is sealed between the inner wall of the second connection end and the outer wall of the first connection end.

[0049] The second pipeline 3 and the first pipeline 4 can also be matched in such a way that the second pipeline 3 is inserted into the first pipeline 4 from one side of the first pipeline 4 and connected to the first pipeline 4 by plugging. At this time, the aperture of the first connection end of the first pipeline 4 is greater than or equal to the outer diameter of the second connection end of the second pipeline 3, and the second connection end of the second pipeline 3 can be inserted into the first connection end. It can be understood that the outer wall of the second pipeline 3 is the first matching surface, the inner wall of the first pipeline 4 is the second matching surface, the second pipeline 3 and the first pipeline 4 have overlapping space in the axial direction (there may be a certain gap between the inner wall of the second pipeline 3 and the outer wall of the first pipeline 4), and the elastic sealing skirt 5 can be arranged on the inner wall of the first connection end of the first pipeline 4 and / or the outer wall of the second connection end of the second pipeline 3, and the elastic sealing skirt 5 is sealed between the inner wall of the first connection end and the outer wall of the second connection end.

[0050] The following description will be made by taking an example that the second pipeline 3 includes a second air inlet pipe 31 and a second air outlet pipe 32 , and the first pipeline 4 includes a first air inlet pipe 41 and a first air outlet pipe 42 .

[0051] The elastic sealing skirt 5 is arranged on the first connection end of the first pipeline 4 or the second connection end of the second pipeline 3, and extends circumferentially along the inner wall or outer wall of the first connection end or the second connection end. Specifically, the elastic sealing skirt 5 can be arranged on the axial end face of the first connection end or the second connection end, and can also be arranged on the axial pipe wall of the first connection end or the second connection end except the end face.

[0052] For example, Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the elastic sealing skirt 5 is respectively arranged on the first axial end surface 316 of the second air inlet pipe 31 and the second axial end surface 329 of the second air outlet pipe 32 .

[0053] Correspondingly, if Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 and Fig.14 As shown, when the first connection end portion is axially connected to the second connection end portion, in order to limit the axial connection position of the two and to better achieve sealing when the two are connected, a stopper protruding outward along the circumference (preferably, the entire circumference) is provided on the outer wall of the first connection end portion or the second connection end portion. Fig.14 and Fig.13 As shown, the second connection end of the first pipeline 4 can be provided with a first stopper 411 (such as Fig.14 As shown) or a second stopper 421.

[0054] It can be understood that when the first air inlet pipe 41 is inserted into the second air inlet pipe 31, the first stopper 411 abuts against the end surface of the second air inlet pipe 31, and when the first air outlet pipe 42 is inserted into the second air outlet pipe 32, the second stopper 421 abuts against the end surface of the second air outlet pipe 32. In addition, the setting of the stopper can not only limit the axial connection between the first pipeline 4 and the second pipeline 3, but also further optimize the sealing performance when the two are connected, so as to prevent the airflow in the connected pipelines from overflowing from the gap at the connection. For example, Fig.13 As shown, the second elastic sealing skirt 52 arranged on the second air outlet pipe 32 is deformed when the first air outlet pipe 42 and the second air outlet pipe 32 are plugged and connected, so as to seal the connection between the first air outlet pipe 42 and the second air outlet pipe 32; in addition, a second stop portion 421 is provided on the outer wall of the first air outlet pipe 42 corresponding to the end of the second air outlet pipe 32, and the outer diameter of the second stop portion 421 is larger than the outer diameter of the second connection end of the second air outlet pipe 32, so that the side end face of the second stop portion 421 abuts against the side end face of the second connection end of the second air outlet pipe 32, thereby preventing the airflow from overflowing from the air intake gap 311 at the connection between the first pipeline 4 and the second pipeline 3. Therefore, on the basis of setting the second elastic sealing skirt 52 for sealing, the setting of the second stop portion 421 can further improve the sealing performance of the connection between the first pipeline 4 and the second pipeline 3.

[0055] The elastic sealing skirt 5 may be disposed on any one or more of the second air inlet pipe 31 , the second air outlet pipe 32 , the first air inlet pipe 41 , and the first air outlet pipe 42 .

[0056] like Figure 4 As shown, when the first elastic sealing skirt 51 is disposed on the second air inlet pipe 31, it can extend along the entire circumference of the second air inlet pipe 31 on the first axial end surface 316. Figure 7 As shown, when the first elastic sealing skirt 51 is disposed on the second air outlet pipe 32 , it can extend along the entire circumference of the second air outlet pipe 32 on the second axial end surface 329 .

[0057] Therefore, it can be understood that when the second elastic sealing skirt 52 is disposed on the first air inlet pipe 41, it can also extend over the entire circumference of the first air inlet pipe 41 (eg, Fig.14 When the second elastic sealing skirt 52 is disposed on the first air outlet pipe 42, it can also extend over the entire circumference of the first air outlet pipe 42. Figure 4As shown, the first elastic sealing skirt 51 extends from the first axial end face 316, and a part of it leaves the first axial end face 316 and does not contact the first axial end face 316, that is, the first elastic sealing skirt 51 includes a fixed end 511 and a free end 512, the fixed end 511 is connected to the first axial end face 316, and the free end 512 is away from the first axial end face 316. Therefore, it can be understood that when the first air intake pipe 41 is inserted into the second air intake pipe 31 from the first axial end face 316, the first elastic sealing skirt 51 can be driven to move and deform. Similarly, as shown in FIG. Figure 7 As shown, the first elastic sealing skirt 51 can extend from the second axial end face 329, and a part of it leaves the second axial end face 329, that is, it does not contact the second axial end face 329. Therefore, it can be understood that when the first air outlet pipe 42 is inserted into the second air outlet pipe 32 from the second axial end face 329, the free end 512 of the first elastic sealing skirt 51 can also be squeezed to move and deform.

[0058] Therefore, when the first air inlet pipe 41 is inserted into the second air inlet pipe 31, the first elastic sealing skirt 51 (the free end 512 thereof) is squeezed and moved by the first air inlet pipe 41 and deformed, so that a circumferential airtight seal can be formed on the pipe wall between the second air inlet pipe 31 and the first air inlet pipe 41. When the first air outlet pipe 42 is inserted into the second air outlet pipe 32, the situation is similar to the above.

[0059] For further information, please see Figure 4 , and please combine Fig.11 The inner side of the end face of the second air inlet pipe 31 is provided with an air inlet cavity 313. When the first air inlet pipe 41 is inserted into the second air inlet pipe 31, the first air inlet pipe 41 cooperates with the air inlet cavity 313, and an air inlet gap 311 is formed between the outer wall of the first air inlet pipe 41 and the inner wall of the air inlet cavity 313. When air is introduced from the second air inlet pipe 31 to the first air inlet pipe 41, the gas can enter the air inlet gap 311, so the gas will exert further pressure on the first elastic sealing skirt 51 on the second air inlet pipe 31, and force the first elastic sealing skirt 51 to expand and press tightly against the end face of the first stopper 411, thereby achieving a more reliable sealing effect between the second air inlet pipe 31 and the first air inlet pipe 41.

[0060] Similarly, see Figure 7 and Fig.13, an air outlet cavity 323 is provided on the inner side of the end face of the second air outlet pipe 32. When the first air outlet pipe 42 is inserted into the second air outlet pipe 32, the first air outlet pipe 42 matches with the air outlet cavity 323, and an air outlet gap 321 is formed between the outer wall of the first air outlet pipe 42 and the inner wall of the air outlet cavity 323. When the gas in the first air outlet pipe 42 flows to the second air outlet pipe 32, the gas can enter the air outlet gap 321, so the gas will exert further pressure on the first elastic sealing skirt 51 on the second air outlet pipe 32, and force the first elastic sealing skirt 51 to deform, expand and press tightly against the end face (second matching face) of the second stopper 421, thereby achieving a more reliable sealing effect between the second air outlet pipe 32 and the first air outlet pipe 42.

[0061] It can be understood that if a second elastic sealing skirt 52 (such as Fig.14 As shown) and / or a second elastic sealing skirt 52 is provided on the first air outlet pipe 42, the above-mentioned more reliable sealing effect can be achieved by deforming, expanding and tightly pressing the second elastic sealing skirt 52 against the second mating surface through the pressure of gas.

[0062] On the contrary, if the gas between the second air inlet pipe 31 and the first air inlet pipe 41 disappears, the first elastic sealing skirt 51 (or the second elastic sealing skirt 52) ​​can eliminate the expansion and tightening effect between it and the first air inlet pipe 41 through its own elastic recovery ability, so that the first air inlet pipe 41 can be easily pulled out of the second air inlet pipe 31 without applying too much pulling force. Similarly, if the gas in the second air outlet pipe 32 and the first air outlet pipe 42 disappears, the first elastic sealing skirt 51 (or the second elastic sealing skirt 52) ​​can eliminate the expansion and tightening effect between it and the first air outlet pipe 42 through its own elastic recovery ability, so that the first air outlet pipe 42 can be easily pulled out of the second air outlet pipe 32 without applying too much pulling force.

[0063] Therefore, the elastic sealing skirt 5 of the utility model can achieve a more reliable airtight seal on the circumferential pipe wall between the second pipeline 3 and the first pipeline 4; and when there is no gas in the second pipeline 3 and the first pipeline 4, the second pipeline 3 and the first pipeline 4 can be easily separated without too much pulling force.

[0064] In such Figure 4 and Fig.11 In the preferred embodiment shown in the figure, when the first elastic sealing skirt 51 is arranged on the second air inlet pipe 31, it can be configured to face the installation direction of the first air inlet pipe 41 (such as Fig.11The curved skirt (indicated by the arrow in the middle), that is, the free end 512 of the first elastic sealing skirt 51 is bent in a direction away from the first stopper 411 and toward the inner wall of the air inlet cavity 313, so that the first elastic sealing skirt 51 forms a hook-shaped structure or a hook-like structure. When the first air inlet pipe 41 is inserted into the air inlet cavity 313 of the second air inlet pipe 31 along its installation direction, the curved free end 512 of the first elastic sealing skirt 51 can be driven to move and deform. When gas is introduced, the gas can apply pressure to the first elastic sealing skirt 51 in a direction opposite to the installation direction of the first air inlet pipe 41, thereby forcing the curved part of the first elastic sealing skirt 51 to deform, expand and press tightly against the end face of the first stopper 411 and the outer wall of the first air inlet pipe 41, thereby ensuring the air tightness of the first air inlet pipe 41.

[0065] In addition, in other optional embodiments, when the first elastic sealing skirt 51 is provided on the second air inlet pipe 31, it can be constructed as a vertical skirt extending radially along the second air inlet pipe 31, that is, the free end 512 of the first elastic sealing skirt 51 only extends radially toward the second air inlet pipe 31 without bending. This structure can also achieve the air tightness of the first air inlet pipe 41.

[0066] like Figure 7 and Fig.13 As shown, when the first elastic sealing skirt 51 is arranged on the second air outlet pipe 32, it can also be configured to face the installation direction of the first air outlet pipe 42 (such as Fig.13 The first elastic sealing skirt 51 is a curved skirt (as shown by the arrow in the middle). Similarly, the first elastic sealing skirt 51 is bent in a direction away from the second stopper 421 and toward the inner wall of the air outlet cavity 323, so the first elastic sealing skirt 51 forms a hook-shaped structure or a hook-like structure. When the first air outlet pipe 42 is inserted into the air outlet cavity 323 of the second air outlet pipe 32 along its installation direction, the curved free end 512 of the first elastic sealing skirt 51 can be driven to move and deform. When gas is introduced, the gas can apply pressure to the first elastic sealing skirt 51 in a direction opposite to the installation direction of the first air outlet pipe 42, thereby forcing the curved part of the first elastic sealing skirt 51 to deform, expand and press tightly against the end face (second mating surface) of the second stopper 421 and the outer wall of the first air outlet pipe 42, thereby ensuring the airtightness of the pipeline connection.

[0067] In addition, in other optional embodiments, when the first elastic sealing skirt 51 is provided on the second air outlet pipe 32, it can be constructed as a vertical skirt extending radially along the second air outlet pipe 32, that is, the free end 512 of the first elastic sealing skirt 51 only extends radially downward toward the second air outlet pipe 32 without bending. This structure can also achieve air tightness when connected to the first air outlet pipe 42.

[0068] In such Figure 4In the preferred embodiment shown, when the first elastic sealing skirt 51 is arranged on the second air inlet pipe 31 , the first elastic sealing skirt 51 extends along the entire circumference of the second air inlet pipe 31 on the first mating surface, that is, a circle of the first elastic sealing skirt 51 is arranged on the second air inlet pipe 31 .

[0069] In such Figure 7 In the preferred embodiment shown, when the first elastic sealing skirt 51 is arranged on the second air outlet pipe 32 , the first elastic sealing skirt 51 extends along the entire circumference of the second air outlet pipe 32 on the first mating surface, that is, a circle of the first elastic sealing skirt 51 is arranged on the second air outlet pipe 32 .

[0070] Regarding the second elastic sealing skirt 52, its arrangement can be similar to that of the first elastic sealing skirt 51. For example, when the second elastic sealing skirt 52 is arranged on the first air inlet pipe 41, it can extend along the entire circumference of the first air inlet pipe 41 on the second mating surface. When the second elastic sealing skirt 52 is arranged on the first air outlet pipe 42, it can extend along the entire circumference of the first air outlet pipe 42 on the second mating surface.

[0071] like Figure 4 and Figure 7 As shown, the first elastic sealing skirt 51 may include a fixed end 511 and a free end 512, wherein the fixed end 511 is fixed to the wall of the second air inlet pipe 31 or the second air outlet pipe 32 and is located at the second connection end. The free end 512 extends along an arc curve in a direction away from the fixed end 511.

[0072] It can be understood that the second elastic sealing skirt 52 can be arranged in the same manner, which will not be elaborated herein.

[0073] More specifically, the free end 512 extends obliquely toward the axial center direction of the first connection end of the first pipe 4 and the second connection end of the second pipe 3 , whichever has a larger inner diameter (hole diameter).

[0074] As described above, when the first pipeline 4 and the second pipeline 3 are connected, the first pipeline 4 can be inserted into the second pipeline 3, and the aperture of the first connecting end of the second pipeline 3 is greater than or equal to the outer diameter of the second connecting end of the first pipeline 4. Fig.13 The free end 512 extends obliquely toward the axial center direction of the second connection end of the second pipeline 3. Alternatively, the second pipeline 3 can be inserted into the first pipeline 4, and the aperture of the first connection end of the first pipeline 4 is greater than or equal to the outer diameter of the second connection end of the second pipeline 3. In this case, the free end 512 extends obliquely toward the axial center direction of the first connection end of the first pipeline 4.

[0075] Therefore, the free end 512 extends in a direction away from the tube wall of the first connection end or the second connection end and closer to the center of the first pipeline 4 or the second pipeline 3. Since the ventilation therapy device is used to generate and provide a ventilation airflow with a pressure higher than the atmospheric pressure to the patient end, the first pipeline 4 and the second pipeline 3 flow with a high-pressure airflow (a ventilation airflow with a pressure higher than the atmospheric pressure). Therefore, after the two are connected, the free end 512 can block the air path connected by the two from the external atmospheric pressure. Fig.11 The ventilation airflow in the air inlet gap 311 is blocked from the atmosphere of the external environment, so there is a pressure difference on both sides of the free end 512. In order to avoid the problem of unsealing caused by the free end 512 being blown outward under the condition of high pressure in the air path, the free end 512 is configured to extend obliquely in a direction away from the external atmospheric pressure (for example, extending obliquely in a certain arc curve), that is, extending toward the inner center direction of the first pipeline 4 or the second pipeline 3. For example, Fig.11 In the embodiment, since the aperture of the connecting end of the second air inlet pipe 31 is larger than the outer diameter of the connecting end of the second air outlet pipe 32, the free end 512 of the elastic sealing skirt 5 extends toward the axial center direction of the second air inlet pipe 31, so that although the high pressure of the ventilation airflow flowing in the air inlet gap 311 presses the free end 512 toward the external environment, due to the inclined structure of the free end 512, the high pressure of the ventilation airflow flowing in the air inlet gap 311 exerts a force in a downward direction (i.e., toward the inside of the tube wall) on the portion of the free end that is in contact with the tube wall, thereby ensuring the sealing performance of the elastic sealing skirt 5.

[0076] More specifically, the free end 512 may include a middle section 5121 and an end section 5122. The middle section 5121 is close to one side of the fixed end 511. When the first pipeline 4 is connected to the second pipeline 3, the first elastic sealing skirt 51 (the second elastic sealing skirt 52) ​​moves and deforms, so that at least the middle section 5121 contacts the surface of the tube wall at the corresponding first connection end or the second connection end, thereby forming a contact surface seal in the circumferential direction of the tube wall. Preferably, the thickness of the middle section 5121 and the thickness of the end section 5122 gradually decrease in the direction from the fixed end 511 to the free end 512. In other words, the elastic sealing skirt 5 is a variable thickness structure, and its free end 512, especially the end section 5122, has a thinner thickness and is easy to deform. It can achieve a sealing effect in a smaller space. Therefore, under the same volume, more space can be saved for use by other components. The first elastic sealing skirt 51 is a skirt with a set width, and the preset width is Figure 4 The distance H between the end section 5122 of the free end 512 and the first axial end surface 316 is Figure 7 The distance D between the end section 5122 of the free end 512 and the second axial end surface 329 is shown. The second elastic sealing skirt 52 can be arranged in the same manner, which will not be described in detail.

[0077] Furthermore, in Figure 4 and Figure 7 In the preferred embodiment shown, there is one first elastic sealing skirt 51. It is conceivable that there may be more than one first elastic sealing skirt 51, which are axially spaced apart along the wall of the second connecting end of the second pipeline 3.

[0078] like Fig.15 As shown, a plurality of first elastic sealing skirts 51 are arranged on the second air inlet pipe 31, wherein some of the first elastic sealing skirts 51 are arranged on the first axial end face 316, and other first elastic sealing skirts 51 are arranged on the inner wall of the air inlet cavity 313, and these first elastic sealing skirts 51 are arranged at intervals in the axial direction of the air inlet cavity 313.

[0079] In addition, a plurality of first elastic sealing skirts 51 may also be provided on the second air inlet pipe 31, wherein some first elastic sealing skirts 51 are provided on the second axial end face 329, and other first elastic sealing skirts 51 are provided on the inner wall of the air outlet cavity 323, and are spaced apart in the axial direction of the air outlet cavity 323.

[0080] Similar to the first elastic sealing skirt 51 , the number of the second elastic sealing skirt 52 may also be one or more, and a plurality of second elastic sealing skirts 52 may be arranged at intervals in the axial direction of the first air inlet pipe 41 or the first air outlet pipe 42 .

[0081] In addition, in order to measure the temperature of the gas, a temperature measuring channel 325 may be provided on the second gas inlet pipe 31 and / or the second gas outlet pipe 32, and a temperature measuring element 326 for measuring the gas temperature may be provided in the temperature measuring channel 325. Figure 5 and Figure 7 As shown, a temperature measuring channel 325 extending radially is provided on the second air outlet pipe 32, wherein a temperature measuring element 326 can measure the outlet air temperature. It can be understood that a similar temperature measuring channel and temperature measuring element can also be provided on the second air inlet pipe 31.

[0082] The temperature measuring element may be, for example, a temperature sensor, a thermocouple, etc.

[0083] The elastic sealing skirt 5 is formed integrally with the tube wall of the first pipeline 4 or the second pipeline 3. For example, the first elastic sealing skirt 51 can be formed integrally with the first axial end surface 316, or the first elastic sealing skirt 51 can be formed integrally with the second axial end surface 329.

[0084] The first elastic sealing skirt 51 and the second elastic sealing skirt 52 can be made of materials such as silicone to ensure that they have a certain elastic deformation ability.

[0085] In addition, if Figure 2 As shown, the second air inlet pipe 31 is constructed as a curved pipe structure, and a first positioning platform 314 is provided on the upper side of the first axial end surface 316, which is used to align with the first mounting groove 21 (such as Figure 1 In addition, the upper end of the first positioning platform 314 is also provided with a first limiting groove 312, which is used to cooperate with the convex on the upper cover, so that the second air intake pipe 31 is fixed on the host 2. The second air intake pipe 31 is also provided with an air pressure test pipeline 315, where the intake air pressure can be tested.

[0086] like Figure 5 As shown, the second air outlet pipe 32 is constructed as a curved pipe structure, and a second positioning platform 324 is provided on the upper side of the second axial end surface 329, which is used to align with the second mounting groove 22 (such as Figure 1 In addition, a second limiting groove 322 is provided at the upper end of the second positioning platform 324, which is used to cooperate with a protrusion on the main unit upper cover (not shown), so that the second air outlet pipe 32 is fixed on the main unit 2.

[0087] like Figure 8 As shown, one side of the second gas outlet pipe 32 is connected to the active gas outlet 328 , and a heating pipeline 327 is also provided on the upper side of the second gas outlet pipe 32 , which is connected to the active gas outlet 328 , so that the gas can be heated.

[0088] It can be understood that a higher sealing effect can be achieved by changing the surface roughness of the elastic sealing skirt 5, for example, by making the surface roughness smaller.

[0089] The air inlet cavity 313 of the second air inlet pipe 31 (or the air outlet cavity 323 of the second air outlet pipe 32) and the first air inlet pipe 41 (or the first air outlet pipe 42) matched therewith are both constructed as a roughly columnar structure, that is, their radial cross-section is circular, so the elastic sealing skirt 5 thereon extends along its circumference, and its radial cross-section is also circular. It can be understood that the radial cross-section of the air inlet cavity 313 of the second air inlet pipe 31 (or the air outlet cavity 323 of the second air outlet pipe 32) and the first air inlet pipe 41 (or the first air outlet pipe 42) matched therewith can also be an ellipse, so the radial cross-section of the elastic sealing skirt 5 thereon is also an ellipse.

[0090] The present invention does not limit the width of the elastic sealing skirt 5, and the width can be selected between 0.5mm-100mm according to actual conditions. Similarly, the present invention does not limit the thickness of the elastic sealing skirt 5, and the thickness can be selected between 0.5mm-100mm according to actual conditions.

[0091] It should be noted that the connection between the second pipeline 3 and the first pipeline 4 of the utility model can be a static connection or a dynamic connection, that is, the second pipeline 3 and the first pipeline 4 can rotate at a low speed, and the elastic sealing skirt 5 can still provide sealing.

[0092] Therefore, the pipeline sealing structure of the utility model has a simple structure, is stable, compact, has a good sealing effect, and has an excellent feel of use. The elastic sealing skirt 5 can fundamentally solve the risk of problems in the coordination between the second pipeline 3 and the first pipeline 4, as well as air leakage, poor sealing, and poor feel of use during use. It can effectively ensure that the second pipeline 3 and the first pipeline 4 can be sealed in both ventilation and air cut-off conditions. At the same time, it can also effectively reduce the unstable operation caused by air leakage in the machine. When used with oxygen, it can effectively ensure the safety of sealing without oxygen leakage.

[0093] According to a second aspect of the present invention, the present invention provides a ventilation treatment device (such as a ventilator), comprising the above-mentioned pipeline sealing structure, a host 2 and a water tank assembly 1, such as Figure 1 As shown, the water tank assembly 1 is arranged on one side of the main unit 2, the second pipeline 3 is arranged on the main unit 2, the first pipeline 4 is arranged on the water tank assembly 1, and is fluidically connected to the chamber containing liquid inside the water tank assembly 1. When the first pipeline 4 is connected to the second pipeline 3, a fluid-connected air path is formed between the main unit 2 and the water tank assembly 1, and the pipeline sealing structure seals the air path.

[0094] The second air inlet pipe 31 and the second air outlet pipe 32 of the second pipeline 3 are respectively and correspondingly arranged in the first installation groove 21 and the second installation groove 22 of the main unit 2. The water tank assembly 1 is inserted into the main unit 2 from the right side of the main unit 2 for installation. Specifically, the first air inlet pipe 41 on the water tank assembly 1 is inserted into the air inlet cavity 313 from the side of the first axial end face 316 of the second air inlet pipe 31, and the first air outlet pipe 42 is inserted into the air outlet cavity 323 from the side of the second axial end face 329 of the second air outlet pipe 32. During the insertion process, the first air inlet pipe 41 and the first air outlet pipe 42 respectively squeeze the first elastic sealing skirt 51 on the second air inlet pipe 31 and the first elastic sealing skirt 51 on the second air outlet pipe 32. The airtight sealing of the first air inlet pipe 41 and the first air outlet pipe 42 can be achieved by the movement and deformation of the first elastic sealing skirt 51.

[0095] After the water tank assembly 1 is installed, when gas is introduced therein, the gas can enter the air inlet gap 311 and the air outlet gap 321, thereby forcing the first elastic sealing skirt 51 to expand again with the first air inlet pipe 41 and the first air outlet pipe 42, thereby achieving a more reliable sealing effect.

[0096] On the contrary, when the first air inlet pipe 41 and the first air outlet pipe 42 stop conveying gas, the first elastic sealing skirt 51 can eliminate the expansion and tightening effect between the first air inlet pipe 41 and the first air outlet pipe 42 through its own elastic recovery ability, so that the water tank assembly 1 and the main unit 2 can be easily separated and the water tank assembly 1 can be removed without much pulling force.

[0097] In addition, those skilled in the art should understand that the ventilation therapy device of the present invention may also include other components and parts for realizing the necessary functions of the ventilation therapy device. These components and parts may adopt known structural forms, and the present invention will not elaborate on them.

[0098] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pipeline sealing structure, characterized in that: The pipeline sealing structure is arranged on the first pipeline and / or the second pipeline, and is used for sealing when the first pipeline is connected to the second pipeline. The pipeline sealing structure includes an elastic sealing skirt arranged on the pipe wall of the first pipeline or the pipe wall of the second pipeline, and the elastic sealing skirt is a skirt with a set width; When the first pipeline is connected to the second pipeline, the elastic sealing skirt located between the tube wall of the first pipeline and the tube wall of the second pipeline moves and deforms, so that a seal is formed between the elastic sealing skirt and the tube wall surface in contact with it.

2. The pipeline sealing structure according to claim 1, characterized in that: The elastic sealing skirt is arranged on the first connection end of the first pipeline or the second connection end of the second pipeline, and extends circumferentially along the inner wall or the outer wall of the first connection end or the second connection end.

3. The pipeline sealing structure according to claim 1 or 2, characterized in that: The number of the elastic sealing skirt is one or more. When the number of the elastic sealing skirt is plural, the plurality of elastic sealing skirts are arranged at intervals along the axial direction of the first pipeline or the second pipeline.

4. The pipeline sealing structure according to claim 2, characterized in that: The aperture of the first connection end is greater than or equal to the outer diameter of the second connection end. When the second connection end is inserted into the first connection end, the elastic sealing skirt is arranged on the inner wall of the first connection end and / or on the outer wall of the second connection end, and the elastic sealing skirt seal is located between the inner wall of the first connection end and the outer wall of the second connection end.

5. The pipeline sealing structure according to claim 2, characterized in that: The aperture of the second connection end is greater than or equal to the outer diameter of the first connection end. When the first connection end is inserted into the second connection end, the elastic sealing skirt is arranged on the inner wall of the second connection end and / or on the outer wall of the first connection end. The elastic sealing skirt seal is located between the inner wall of the second connection end and the outer wall of the first connection end.

6. The pipeline sealing structure according to claim 2, characterized in that: The elastic sealing skirt includes a fixed end and a free end, wherein the fixed end is fixed on the tube wall of the first pipeline or the tube wall of the second pipeline, and the free end extends along an arc curve in a direction away from the fixed end.

7. The pipeline sealing structure according to claim 6, characterized in that: The free end extends obliquely toward the axial center direction of the one having a larger inner diameter among the connection end of the first pipe and the connection end of the second pipe.

8. The pipeline sealing structure according to claim 6, characterized in that: The free end includes a middle section and an end section, and the middle section is close to the fixed end. When the first pipeline is connected to the second pipeline, the elastic sealing skirt moves and deforms, so that at least the middle section contacts the pipe wall surface at the corresponding first connection end or the second connection end to form a contact seal.

9. The pipeline sealing structure according to claim 1, characterized in that: The elastic sealing skirt is formed integrally with a tube wall of the first pipeline or the second pipeline.

10. The pipeline sealing structure according to claim 4 or 5, characterized in that: When the first connection end portion and the second connection end portion are connected, a stopper protruding outward along its circumferential direction is provided on the outer wall of the one with the smaller aperture, and the stopper is used to limit the axial connection between the first connection end portion and the second connection end portion.

11. The pipeline sealing structure according to claim 8, characterized in that: The thickness of the middle section and the end section gradually decreases in a direction from the fixed end to the free end.

12. A ventilation therapy device, characterized in that: It comprises the pipeline sealing structure, a main unit and a water tank assembly according to any one of claims 1 to 11, wherein the first pipeline is arranged on the water tank assembly, and the second pipeline is arranged on the main unit, and when the first pipeline is connected to the second pipeline, a fluid-connected air circuit is formed between the main unit and the water tank assembly, and the pipeline sealing structure seals the air circuit.

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