Pipeline connecting device

Abstract

The invention discloses a pipeline connecting device which comprises a first bed board, a thigh bag placed on the first bed board and a first gas conveying hose with one end used for being connected with the thigh bag, a first gas path adapter is connected between the first gas conveying hose and the thigh bag, the first gas path adapter is formed in a bent mode, and a second gas path adapter is connected between the first gas conveying hose and the thigh bag. Wherein the included angle alpha between the central axes of the two ends of the first gas path adapter is larger than or equal to 100 degrees and smaller than or equal to 140 degrees; wherein the number of the first air conveying hoses is two, and the first air conveying hoses are used for extracting or injecting air into the thigh bag. The first gas circuit adapter communicates the first gas conveying hose with the thigh bag, the bending angle of the first gas conveying hose is reduced, the situation that the position of the thigh bag is changed due to bending of the first gas conveying hose is also prevented, and gas is evenly injected into the thigh bag through the first gas conveying hose.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline connection, and in particular to a pipeline connection device. Background Art

[0002] The pipeline connection technology is crucial in the EVCP equipment. The preparation work for pipeline connection includes checking the equipment: ensuring that the EVCP equipment is in normal working condition, and checking whether the main unit, air pump and other components are operating well. Selecting suitable pipelines: selecting pipelines of appropriate specifications and materials according to the equipment requirements and the patient's condition. Sealing check: after the connection is completed, perform a sealing check. Pressure test: start the EVCP equipment, perform a pressure test, and observe whether the pressure in the pipeline is normal and whether it can be adjusted according to the set parameters. Patient comfort check: ask the patient how they feel after connecting the pipeline, whether there is any discomfort or pressure.

[0003] The hose at the trachea interface is always in a long-term bent and stressed state, and the user can feel a large restraining force, which greatly affects the wearing experience; at the same time, when the hose is inflated / deflated, the hose is vertically inserted into the thigh bag, which will cause the hose to shake, accelerating the aging of the hose in the bent state and posing a risk of leakage; the shaking of the hose will also cause the two adjacent sections of the hose to rub against each other, which also affects the service life of the hose; and it will cause the airflow inside the thigh bag to be unstable, which will also cause cavitation and noise, and thus a pipeline connection device is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems in the prior art that the hose is subjected to stress due to long-term bending, which affects the wearing experience of the bag, and the pipeline is prone to shaking during inflation / deflation, which leads to unstable airflow inside the leg bag. A pipeline connection device is proposed.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a pipeline connection device, comprising a first bed board, a thigh bag placed on the first bed board and a first air supply hose at one end for connecting to the thigh bag, a first air circuit adapter is connected between the first air supply hose and the thigh bag, the first air circuit adapter is bent into shape, wherein the angle between the central axes at both ends of the first air circuit adapter is α, wherein 140°≥α≥100°; wherein the number of the first air supply hoses is two, and the first air supply hoses are used to extract or inject air into the thigh bag; wherein the first air circuit adapter connects the first air supply hose and the thigh bag, reduces the bending angle of the first air supply hose, prevents the first air supply hose from changing the position of the thigh bag due to its bending, and enables the first air supply hose to evenly inject air into the thigh bag.

[0006] Preferably, a waist bag is also placed on the first bed board, wherein an air injection port is provided on the waist bag, and the waist bag is connected to a second air circuit adapter via the air injection port. When the waist bag is wrapped on the human body, the second air circuit adapter is located on both sides of the waist bag, wherein the first air circuit adapter and the second air circuit adapter have the same shape and size; the waist bag is connected to a second air supply hose via the second air circuit adapter, and the lower end of the second air supply hose passes through the side end of the bed base; the bed base is fixed at the lower end of the first bed board.

[0007] Preferably, the outer surface of the first gas hose is clamped with a tube clamp for improving the stability of the first gas hose, and the tube clamp includes a first tube clamp and a second tube clamp with an arc-shaped opening, wherein the opening ends of the first tube clamp and the second tube clamp are respectively clamped on the two first gas hoses, and the ends of the first tube clamp and the second tube clamp are hinged to each other.

[0008] Preferably, one end of the first gas circuit adapter is tilted downward and faces the upper end of the first gas delivery hose.

[0009] Preferably, an annular groove is provided at one end of the first air circuit adapter, and the annular groove is provided on the outer surface of the first air circuit adapter; the other end of the first air circuit adapter is installed in the thigh bag, and a second protrusion is provided on the outer surface of the first air circuit adapter, and the end face of the second protrusion abuts against the outer surface of the thigh bag; a bending portion is provided between the annular groove and the second protrusion; a third air circuit adapter is installed between the first air circuit adapter and the first air supply hose, wherein the third air circuit adapter is fixed to the end of the first air supply hose, and the first air circuit adapter and the third air circuit adapter are movably connected.

[0010] Preferably, a fourth protrusion is provided at one end of the third gas circuit adapter, and a third protrusion is provided at the other end, wherein the third protrusion, the fourth protrusion and the third gas circuit adapter are integrally connected; a fifth protrusion is provided on the outer surface of the third gas circuit adapter, a movable clamping ring is provided on one side of the fifth protrusion, and a first fastening ring is provided on the other side; the first fastening ring is sleeved on one end of the first gas hose, and the other end of the first gas hose is sleeved with the second fastening ring, and the movable clamping ring and the fourth protrusion are movably connected.

[0011] Preferably, the ends of the first fastening ring and the second fastening ring are both provided with conical protrusions, the conical protrusions and the first fastening ring are integrally connected, and the conical protrusions are arranged on the inner side wall of the first fastening ring; the end of the first gas hose is provided with a first protrusion, the first protrusion and the first gas hose are integrally connected, and the first protrusion is arranged on the outer surface of the first gas hose, the first protrusion is a right-angle cone structure, and the inclined surface of the first protrusion abuts on the inclined surface of the conical protrusion, and the end of the first gas hose abuts on the end surface of the fifth protrusion.

[0012] Preferably, the fifth protrusion is a convex ring structure, the first fastening ring and the fifth protrusion are threadedly connected, and the end of the first fastening ring abuts on the fifth protrusion, the first fastening ring abuts on the first protrusion via the conical protrusion, and the end of the first gas hose abuts on the end face of the fifth protrusion; the number of the first protrusions is at least 1, and when the number of the first protrusions is 1, the first protrusion is a circular ring structure; when the number of the first protrusions is at least 2, the first protrusion is an arc-shaped ring structure.

[0013] Preferably, the other end of the first air supply hose is connected to a fourth air circuit adapter, and the fourth air circuit adapter is fixed on the first bed board, and the upper end of the fourth air circuit adapter is used to fix the second fastening ring; the upper end surface of the first bed board is provided with a first opening, and the fourth air circuit adapter is installed in the first opening, wherein the first opening is arranged close to the middle of the first bed board, so that the thigh bladders are symmetrically distributed above the first bed board.

[0014] Preferably, a second bed board is arranged at one end of the first bed board, and a bed base is arranged below the second bed board, wherein one end of the second bed board is hinged to the bed base.

[0015] Preferably, the bending angle of the second gas circuit adapter is β, wherein β=90°, and the upper end surface of the first bed board is provided with a second opening, and the second opening is used for installing a second gas delivery hose.

[0016] Beneficial effect: This technical solution reduces the bending degree of the end and the whole of the first gas hose by setting a bent first gas circuit adapter between the thigh bladder and the first gas hose, preventing the first gas hose from aging due to long-term bending stress at the end, and preventing the first gas hose from exerting a rebound force on the thigh bladder due to bending. The straight tube-shaped first gas circuit adapter will press against the human body due to inflation / deflation, thereby reducing the impact on the user's wearing experience. This technical solution makes the thigh bladder conform to ergonomics by setting a bent first gas circuit adapter, making it more comfortable to wear. At the same time, the first gas hose can inflate / deflate the thigh bladder more smoothly, and the shaking and bending degree of the first gas hose are reduced, which significantly improves the service life of the first gas hose, the first gas circuit adapter and the thigh bladder, and also significantly reduces the cavitation and noise caused by the turbulent flow of the inflation / deflation gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A top view of a pipeline connection device proposed by the present invention; Figure 2 A three-dimensional diagram of the pipeline connection device proposed by the present invention; Figure 3 A three-dimensional diagram of a partial structure of the pipeline connecting device proposed by the present invention; Figure 4 A three-dimensional diagram of a partial structure of the pipeline connecting device proposed by the present invention; Figure 5 for Figure 4 Sectional view at AA; Figure 6 for Figure 5 Enlarged view of point B.

[0018] Legend: 1. Bed base; 11. First bed board; 110. First opening; 111. Second opening; 12. Second bed board; 13. Fourth air circuit adapter; 2. Waist bag; 20. Air injection port; 3. Thigh bag; 41. First air hose; 411. First protrusion; 42. Second air hose; 51. First tube clamp; 52. Second tube clamp; 61. First air circuit adapter; 611. Second protrusion; 613. Annular groove; 62. Second air circuit adapter; 71. Movable clamp; 72. Third air circuit adapter; 721. Fifth protrusion; 722. Third protrusion; 723. Fourth protrusion; 731. First fastening ring; 7311. Conical protrusion; 732. Second fastening ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0021] Reference Figure 1-Figure 6 , an embodiment of the present invention provides a pipeline connection device, including a first bed board 11, a thigh bag 3 placed on the first bed board 11 and a first air delivery hose 41 at one end for connecting the thigh bag 3; A first gas circuit adapter 61 is connected between the first gas delivery hose 41 and the thigh bladder 3. The first gas circuit adapter 61 is bent, wherein the angle between the central axes of the two ends of the first gas circuit adapter 61 is α, wherein 140°≥α≥100°; in this embodiment, the bending angle α enables the first gas circuit adapter 61 to uniformly inject gas into the thigh bladder 3, and reduces the rebound force exerted on the thigh bladder 3 by the end of the first gas delivery hose 41 due to bending; There are two first air delivery hoses 41, which are used to extract or inject air into the thigh bladder 3. In this embodiment, since the bladder inside the thigh bladder 3 is flat, a first air circuit adapter 61 is required to reduce the influence of the first air delivery hose 41 on the inflation angle of the thigh bladder 3 due to the rebound force. The first air circuit adapter 61 connects the first air supply hose 41 and the thigh bag 3, reduces the bending angle of the first air supply hose 41, prevents the first air supply hose 41 from changing the position of the thigh bag 3 due to its bending, and allows the first air supply hose 41 to evenly inject air into the thigh bag 3.

[0022] In the present embodiment, a bent first air circuit adapter 61 is provided between the thigh bladder 3 and the first air supply hose 41 to reduce the bending degree of the end portion and the entire first air supply hose 41, thereby preventing the first air supply hose 41 from aging due to long-term bending of the end portion and also preventing the first air supply hose 41 from exerting a rebound force on the thigh bladder 3 due to bending. The straight tube-shaped first air circuit adapter 61 will press against the human body due to inflation / deflation, thereby reducing the impact on the user's wearing experience. When the first gas hose 41 is vertically connected to the thigh bag 3, the first gas hose 41 is easily shaken by continuous inflation / deflation, which affects the airflow stability inside the thigh bag 3 and easily generates noise and air leakage. The technical solution provides a bent first gas circuit adapter 61 to make the thigh bag 3 conform to ergonomics and more comfortable to wear. At the same time, the first gas hose 41 inflates / deflates the thigh bag 3 more smoothly, and also reduces the shaking and bending of the first gas hose 41, significantly improving the service life of the first gas hose 41, the first gas circuit adapter 61 and the thigh bag 3, and also significantly reducing the cavitation and noise caused by the turbulent flow of the inflation / deflation gas. At the same time, it is also possible to determine whether the first gas hose 41 is twisted according to the angle direction of the first gas circuit adapter 61, and the first gas hose 41 can be quickly prevented from twisting.

[0023] As a further improved embodiment, the bending angle of the first gas circuit adapter 61 is preferably 100°, 120°, 122°, or 140°, wherein one end of the first gas circuit adapter 61 is tilted downward and toward the upper end of the first gas hose 41, so that the end of the first gas circuit adapter 61 can be easily connected to one end of the first gas hose 41 and the bending degree of the end of the first gas hose 41 can be reduced.

[0024] As a further improved embodiment, a waist bag 2 is further placed on the first bed board 11, and an air injection port 20 is provided on the waist bag 2. The waist bag 2 is connected to a second air circuit adapter 62 via the air injection port 20; When the waist bag 2 is wrapped around the human body, the second air path adapter 62 is located on both sides of the waist bag 2; The first gas circuit adapter 61 and the second gas circuit adapter 62 have the same shape and size; The waist bag 2 is connected to a second gas hose 42 via a second gas path adapter 62, and the lower end of the second gas hose 42 passes through the side end of the bed base 1; The bed base 1 is fixed at the lower end of the first bed board 11, and the bed base 1 is used to install an air pump, which inflates or exhausts the thigh bag 3 and the waist bag 2 through the first air delivery hose 41 and the second air delivery hose 42 respectively.

[0025] As a further improved embodiment, the outer surface of the first gas hose 41 is clamped with a tube clamp for improving the stability of the first gas hose 41, and the tube clamp includes a first tube clamp 51 and a second tube clamp 52 with an arc-shaped opening, wherein the opening ends of the first tube clamp 51 and the second tube clamp 52 are respectively clamped on the two first gas hoses 41, and the end of the first tube clamp 51 is installed on the end of the second tube clamp 52, so that the two first gas hoses 41 are symmetrically distributed.

[0026] In this embodiment, the first tube clamp 51 and the second tube clamp 52 are used to limit the divergence angle of the two first gas hoses 41, and the first tube clamp 51 and the second tube clamp 52 are arranged between the two first gas hoses 41 to improve the stability of the first gas hose 41, thereby preventing the first gas hose 41 from shaking drastically during inflation / deflation, and also making the fixed position of the first gas circuit adapter 61 more ergonomic, thereby improving the comfort of wearing the thigh bag 3. Embodiment 2

[0027] Reference Figure 1-Figure 6 The difference between this embodiment and the first embodiment is that an annular groove 613 is provided at one end of the first gas circuit adapter 61, and the annular groove 613 is provided on the outer surface of the first gas circuit adapter 61; The other end of the first gas circuit adapter 61 is installed in the thigh bladder 3, and the outer surface of the first gas circuit adapter 61 is provided with a second protrusion 611, and the end surface of the second protrusion 611 abuts against the outer surface of the thigh bladder 3; wherein a bending portion is provided between the annular groove 613 and the second protrusion 611; A third gas circuit adapter 72 is installed between the first gas circuit adapter 61 and the first gas delivery hose 41 , wherein the third gas circuit adapter 72 is fixed to the end of the first gas delivery hose 41 , and the first gas circuit adapter 61 and the third gas circuit adapter 72 are movably connected.

[0028] In this embodiment, the third air circuit adapter 72 is provided at the end of the first air supply hose 41 so that the first air supply hose 41 and the first air circuit adapter 61 can be detachably connected. The first air circuit adapter 61 can be separated from the third air circuit adapter 72 by moving the end of the third air circuit adapter 72, thereby facilitating the installation of the first air circuit adapter 61 on the thigh bag 3, and then the fixed first air circuit adapter 61 is installed on the third air circuit adapter 72. Embodiment 3

[0029] Reference Figure 1-Figure 6 , the difference between this embodiment and the second embodiment is that the third gas circuit adapter 72 is provided with a fourth protrusion 723 at one end and a third protrusion 722 at the other end, wherein the third protrusion 722, the fourth protrusion 723 and the third gas circuit adapter 72 are integrally connected; The outer surface of the third gas path adapter 72 is provided with a fifth protrusion 721, one side of the fifth protrusion 721 is provided with a movable clamping ring 71, and the other side is provided with a first fastening ring 731; The first fastening ring 731 is sleeved on one end of the first gas delivery hose 41, and the other end of the first gas delivery hose 41 is sleeved with a second fastening ring 732; The movable snap ring 71 and the fourth protrusion 723 are movably connected, wherein a spring is arranged between the fourth protrusion 723 and the movable snap ring 71, and a ball is also installed on the fourth protrusion 723; An annular groove 613 is provided on the outer surface of one end of the first gas circuit adapter 61, and the size of the annular groove 613 matches the size of the ball; the movable snap ring 71 moves axially along the fourth protrusion 723 to place the ball in the annular groove 613, thereby achieving a snap connection and fixing between the first gas circuit adapter 61 and the fourth protrusion 723; The ends of the first fastening ring 731 and the second fastening ring 732 are both provided with a conical protrusion 7311, the conical protrusion 7311 and the first fastening ring 731 are integrally connected, and the conical protrusion 7311 is provided on the inner side wall of the first fastening ring 731; in this embodiment, the first fastening ring 731 and the second fastening ring 732 have the same shape; The end of the first gas delivery hose 41 is provided with a first protrusion 411, the first protrusion 411 and the first gas delivery hose 41 are integrally connected, and the first protrusion 411 is provided on the outer surface of the first gas delivery hose 41; The first protrusion 411 is in a right-angle cone structure, and the inclined surface of the first protrusion 411 abuts against the inclined surface of the conical protrusion 7311, and the end of the first gas delivery hose 41 abuts against the end surface of the fifth protrusion 721; The fifth protrusion 721 is a convex ring structure, the first fastening ring 731 and the fifth protrusion 721 are threadedly connected, and the end of the first fastening ring 731 abuts on the fifth protrusion 721, the first fastening ring 731 abuts on the first protrusion 411 through the conical protrusion 7311, and the end of the first gas hose 41 abuts on the end face of the fifth protrusion 721.

[0030] The number of the first protrusions 411 is at least one. When the number of the first protrusions 411 is one, the first protrusions 411 are in a circular ring structure; when the number of the first protrusions 411 is at least two, the first protrusions 411 are in an arc-shaped ring structure.

[0031] In this embodiment, a conical protrusion 7311 is provided on the first fastening ring 731 to prevent the first gas hose 41 with the first protrusion 411 on the outer surface from falling off or loosening, and also to prevent gas leakage between the first gas hose 41 and the third gas circuit adapter 72.

[0032] As a further improved embodiment, the other end of the first gas delivery hose 41 is connected to a fourth gas circuit adapter 13, the fourth gas circuit adapter 13 is fixed on the first bed plate 11, and the upper end of the fourth gas circuit adapter 13 is used to fix the second fastening ring 732; The upper end surface of the first bed board 11 is provided with a first opening 110 , and the fourth air path adapter 13 is installed in the first opening 110 , wherein the first opening 110 is provided near the middle of the first bed board 11 , so that the thigh bladder 3 is symmetrically distributed above the first bed board 11 .

[0033] As a further improved embodiment, a second bed board 12 is arranged at one end of the first bed board 11 , a bed base 1 is arranged below the second bed board 12 , and one end of the second bed board 12 is hinged to the bed base 1 .

[0034] As a further improved embodiment, the bending angle of the second gas circuit adapter 62 is β, where β=90°, and the upper end surface of the first bed plate 11 is provided with a second opening 111, and the second opening 111 is used to install the second gas hose 42. In this embodiment, the bending angle of the second gas circuit adapter 62 is β=90°, thereby further reducing the bending degree of the second gas hose 42.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipeline connection device, comprising a first bed board (11), a thigh bag (3) placed on the first bed board (11), and a first air supply hose (41) having one end connected to the thigh bag (3), wherein a first air circuit adapter (61) is connected between the first air supply hose (41) and the thigh bag (3), characterized in that: The first gas circuit adapter (61) is formed by bending, wherein the angle between the central axes of the two ends of the first gas circuit adapter (61) is α, wherein 140°≥α≥100°; wherein the number of the first gas supply hoses (41) is two, and the first gas supply hoses (41) are used to extract or inject air into the thigh bag (3); wherein the first gas circuit adapter (61) connects the first gas supply hose (41) and the thigh bag (3), and reduces the bending angle of the first gas supply hose (41), and also prevents the first gas supply hose (41) from changing the position of the thigh bag (3) due to its bending, and enables the first gas supply hose (41) to uniformly inject air into the thigh bag (3).

2. The pipe connection device according to claim 1, characterized in that: A waist bag (2) is also placed on the first bed board (11), wherein an air injection port (20) is provided on the waist bag (2), and the waist bag (2) is connected to a second air circuit adapter (62) via the air injection port (20); when the waist bag (2) is wrapped around a human body, the second air circuit adapter (62) is located on both sides of the waist bag (2), wherein the first air circuit adapter (61) and the second air circuit adapter (62) have the same shape and size; the waist bag (2) is connected to a second air supply hose (42) via the second air circuit adapter (62), and the lower end of the second air supply hose (42) passes through the side end of the bed base (1); the bed base (1) is fixed to the lower end of the first bed board (11).

3. The pipe connection device according to claim 1, characterized in that: The outer surface of the first gas delivery hose (41) is clamped with a tube clamp for improving the stability of the first gas delivery hose (41), and the tube clamp comprises a first tube clamp (51) and a second tube clamp (52) with an arc-shaped opening, wherein the opening ends of the first tube clamp (51) and the second tube clamp (52) are clamped on the two first gas delivery hoses (41) respectively, and the ends of the first tube clamp (51) and the second tube clamp (52) are hingedly connected to each other.

4. The pipe connection device according to claim 1, characterized in that: One end of the first gas path adapter (61) is arranged to be tilted downward and toward the upper end of the first gas delivery hose (41).

5. The pipe connection device according to any one of claims 1 to 4, characterized in that: An annular groove (613) is provided at one end of the first gas circuit adapter (61), and the annular groove (613) is provided on the outer surface of the first gas circuit adapter (61); the other end of the first gas circuit adapter (61) is installed in the thigh bag (3), and a second protrusion (611) is provided on the outer surface of the first gas circuit adapter (61), and the end surface of the second protrusion (611) abuts against the outer surface of the thigh bag (3); a bending portion is provided between the annular groove (613) and the second protrusion (611); a third gas circuit adapter (72) is installed between the first gas circuit adapter (61) and the first gas supply hose (41), and the third gas circuit adapter (72) is fixed to the end of the first gas supply hose (41), and the first gas circuit adapter (61) and the third gas circuit adapter (72) are movably connected.

6. The pipe connection device according to claim 5, characterized in that: One end of the third gas circuit adapter (72) is integrally connected to the fourth protrusion (723), and the other end is integrally connected to the third protrusion (722); the outer surface of the third gas circuit adapter (72) is provided with a fifth protrusion (721); one side of the fifth protrusion (721) is provided with a movable clamping ring (71), and the other side is provided with a first fastening ring (731); the first fastening ring (731) is sleeved on one end of the first gas supply hose (41), and the other end of the first gas supply hose (41) is sleeved with the second fastening ring (732); the movable clamping ring (71) and the fourth protrusion (723) are movably connected.

7. The pipe connection device according to claim 6, characterized in that: The ends of the first fastening ring (731) and the second fastening ring (732) are both integrally connected with a conical protrusion (7311), and the conical protrusion (7311) is arranged on the inner wall of the first fastening ring (731); the end of the first gas hose (41) is integrally connected with a first protrusion (411), and the first protrusion (411) is arranged on the outer surface of the first gas hose (41), the first protrusion (411) is in a right-angle cone structure, and the inclined surface of the first protrusion (411) abuts against the inclined surface of the conical protrusion (7311), wherein the end of the first gas hose (41) abuts against the end surface of the fifth protrusion (721).

8. The pipe connection device according to claim 7, characterized in that: The fifth protrusion (721) is in the form of a convex ring structure; the first fastening ring (731) and the fifth protrusion (721) are threadedly connected, and the end of the first fastening ring (731) abuts against the fifth protrusion (721); the first fastening ring (731) abuts against the first protrusion (411) via the conical protrusion (7311); the number of the first protrusion (411) is at least one, and when the number of the first protrusion (411) is one, the first protrusion (411) is in the form of a circular ring structure; when the number of the first protrusion (411) is at least two, the first protrusion (411) is in the form of an arcuate ring structure.

9. The pipe connection device according to claim 6, characterized in that: The other end of the first air delivery hose (41) is connected to a fourth air circuit adapter (13), and the fourth air circuit adapter (13) is fixed on the first bed board (11), wherein the upper end of the fourth air circuit adapter (13) is used to fix the second fastening ring (732); the upper end surface of the first bed board (11) is provided with a first opening (110), and the fourth air circuit adapter (13) is installed in the first opening (110), wherein the first opening (110) is provided close to the middle of the first bed board (11), so that the thigh bladders (3) are symmetrically distributed above the first bed board (11).

10. The pipe connection device according to claim 2, characterized in that: The bending angle of the second gas path adapter (62) is β, where β=90°. The upper end surface of the first bed board (11) is provided with a second opening (111), and the second opening (111) is used to install a second gas delivery hose (42).

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