Water bag backflow device

Abstract

The utility model relates to a water bag backflow device, relates to the technical field of medical equipment, and is used for solving the problems that in the prior art, the content of liquid in a water bag is difficult to accurately control, so that safety risks possibly exist, or the water bag cannot achieve the effect of the water bag. Comprising a water bag, a transparent sealing backflow cylinder, a level piece and an air bag, one end of the sealing backflow cylinder is detachably connected with the water bag, the other end of the sealing backflow cylinder is communicated with the air bag through an air pipe, and the air pipe is provided with a branch pipe used for injecting liquid; scale marks are arranged on the sealed backflow cylinder, and a level piece used for detecting whether the surface of liquid in the sealed backflow cylinder is horizontal or not is arranged in the sealed backflow cylinder.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially is related to a water bag backflow device. BACKGROUND

[0002] Water bag as a kind of device widely used in medical practice, it plays a vital role in the treatment in uterine cavity, induced abortion and hemostasis etc. operation. Its core operating mechanism relies on the expansion and contraction process of water bag, by exerting moderate compression and stimulation to uterine cavity, to realize the expected therapeutic effect.

[0003] In actual clinical application, if water bag is too much, it can cause the abnormal increase of intrauterine pressure, which not only increases the risk of infection, but also can induce serious complications such as placental abruption, which poses a serious threat to the health of patients. On the contrary, if the liquid in water bag is insufficient, the treatment or induced abortion effect will be greatly discounted due to insufficient compression, and the expected medical goal cannot be achieved.

[0004] At present, the traditional method commonly used in hospital is to directly extract the excess liquid in water bag by syringe and discard, and when it is found that the liquid is insufficient, it is supplemented. However, this operation mode is not only inefficient, but also difficult to realize the accurate control of liquid content in water bag, which may cause a series of problems mentioned above. UTILITY MODEL CONTENTS

[0005] In view of the defects in the prior art, the utility model provides a water bag backflow device, which is used to solve the problem that the liquid content in water bag is difficult to accurately control in the prior art, so there may be safety risk or water bag cannot achieve its effect.

[0006] In order to achieve the above purpose, the utility model provides a water bag backflow device, which comprises: water bag, transparent sealed backflow cylinder, level piece and air bag, one end of the sealed backflow cylinder is detachably connected with the water bag, the other end is communicated with the air bag through air pipe, branch pipe for injecting liquid is arranged on the air pipe.

[0007] Scale line is arranged on the sealed backflow cylinder, and level piece is arranged in the sealed backflow cylinder for detecting whether the liquid surface in the sealed backflow cylinder is horizontal.

[0008] In this way, through the cooperation of water bag, branch pipe, sealed backflow cylinder, scale line, level piece and air bag, the liquid content in water bag can be accurately controlled, so that the water bag can play its due effect, and the situation that the liquid content in water bag is too much and the intrauterine pressure of patient is abnormally high can be avoided, and the threat to the health of patient is reduced.

[0009] Further, the scale line is provided with at least two, each of the scale line has a center line, and the center line of the scale line is parallel to the central axis of the sealed reflux cylinder;

[0010] One of the center lines of the scale lines is located on a first plane with the central axis of the sealed reflux cylinder, and the other center line of the scale line is located on a second plane with the central axis of the sealed reflux cylinder, and the first plane is perpendicular to the second plane; the level is used to coincide with the intersection line of the first plane and the second plane.

[0011] Further, the level includes a first fishing line and a first gravity ball, one end of the first fishing line is connected to the inner top wall of the sealed reflux cylinder, and the other end of the first fishing line is fixedly connected with the first gravity ball; when the liquid surface in the sealed reflux cylinder is horizontal, the first fishing line coincides with the intersection line of the first plane and the second plane.

[0012] Further, the level includes a second fishing line, a second gravity ball and a positioning circle, one end of the second fishing line is connected to the inner top wall of the sealed reflux cylinder, and the other end of the second fishing line is fixedly connected with the second gravity ball; the positioning circle is fixedly installed on the inner bottom plate of the sealed reflux cylinder and located directly below the mounting point of the second fishing line; when the liquid surface in the sealed reflux cylinder is horizontal, the second gravity ball falls on the positioning circle, and the bottom of the second gravity ball coincides with the positioning circle.

[0013] Further, the Y-shaped tube is fixedly connected to the air bag, the air inlet one-way control valve and the air outlet one-way control valve are respectively installed on two branches of the Y-shaped tube, and the clamps for cutting off the gas flow are detachably installed on the two branches of the Y-shaped tube.

[0014] Further, the hard connecting pipe is penetrated through the sealed reflux cylinder, one end port of the hard connecting pipe penetrates through the sealed reflux cylinder and is close to the bottom of the sealed reflux cylinder, and the other end is detachably connected with the water bag.

[0015] Further, the flexible tube is fixedly connected to the water bag, the end of the flexible tube is elastically sleeved on the hard connecting pipe, and the flow-stopping clamp for cutting off the liquid flow is detachably installed on the flexible tube.

[0016] Further, the water bag is fixedly connected with a hose, the end of the hose is fixedly connected with a hard pipe, a hollow mounting block is fixedly installed in the hard pipe, a spring is fixedly installed on the mounting block, one end of the spring is fixedly connected with the mounting block, and the other end is fixedly connected with a baffle; the extension direction of the spring is parallel to the central axis of the hard pipe, a limiting piece is arranged at the end of the hard pipe, the baffle abuts against the limiting piece, the diameter of the baffle is smaller than the inner diameter of the hard pipe and larger than the inner diameter of the limiting piece; a push rod is fixedly connected with the end of the hard connecting pipe, the diameter of the push rod is smaller than the inner diameter of the hard connecting pipe, and the push rod is used for pushing the baffle; the hard connecting pipe and the hard pipe are clamped through the limiting piece.

[0017] Further, the limiting piece is arranged as an elastic limiting ring, and the elastic limiting ring is fixedly installed at the end of the hard pipe and used for clamping the hard connecting pipe.

[0018] Further, a pouring inlet is arranged on the sealed reflux cylinder, and a sealing cover used for opening and closing the pouring inlet is rotatably installed at the pouring inlet.

[0019] The beneficial effects of the embodiment are as follows:

[0020] 1. Through the cooperation of the water bag, the branch pipe, the sealed reflux cylinder, the scale line, the leveling piece and the air bag, the liquid content in the water bag can be accurately controlled, so that the water bag can play its due role, and the situation that the liquid content in the water bag is too much and causes the abnormal increase of the internal pressure of the uterine cavity of the patient is avoided, and the health threat to the patient is reduced.

[0021] 2. Through the cooperation of the second fishing line, the second gravity ball and the positioning circle, the sealed reflux cylinder can be ensured to be horizontally placed, so that the accuracy of reading of the scale line is ensured, and the liquid content in the water bag is accurately controlled.

[0022] 3. Through the cooperation of the branch pipe and the syringe, the water bag can be injected and sucked in a small amount, and the liquid content in the water bag can be accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole structure schematic view of the first embodiment of the connection mode between the water bag and the hard connecting pipe in the water bag reflux device of the utility model embodiment;

[0024] Figure 2 It is a sectional structure schematic view of the second embodiment of the connection mode between the water bag and the hard connecting pipe in the water bag reflux device of the utility model embodiment;

[0025] Figure 3 It is the whole structure schematic view of the water bag reflux device of the utility model embodiment; Figure 2An enlarged schematic view of the structure of the middle part A;

[0026] Figure 4 A cross-sectional structure schematic view of the hard connecting pipe and the hard pipe of the water bag backflow device of the embodiment of the utility model not connected;

[0027] Figure 5 A cross-sectional structure schematic view of the second embodiment of the level piece of the water bag backflow device of the embodiment of the utility model;

[0028] Figure 6 The water bag backflow device of the embodiment of the utility model Figure 5 An enlarged schematic view of the structure of the middle part B.

[0029] Among them, the sealed backflow cylinder 1, the hard connecting pipe 11, the sealing cover 12, the scale line 13;

[0030] The water bag 2, the hose 21;

[0031] The air bag 3, the Y-shaped pipe 31, the air inlet one-way control valve 32, the air outlet one-way control valve 33, the air pipe 34, the branch pipe 35;

[0032] The first fishing line 4, the first gravity ball 41, the second fishing line 42, the second gravity ball 43, the positioning circle 44;

[0033] The hard pipe 5, the mounting block 51, the spring 52, the baffle 53, the push rod 54, the elastic limiting ring 55, the sealing sleeve 56. DETAILED DESCRIPTION

[0034] The specific embodiments of the utility model will be described in detail below, and it should be noted that the embodiments described herein are only used for example and do not limit the utility model. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model does not have to be implemented with these specific details. In other examples, in order to avoid confusion of the utility model, well-known circuits, software or methods are not specifically described.

[0035] Reference throughout this specification to "one embodiment", "an embodiment", "one design", or "a design" means that a particular feature, structure, or characteristic described in connection with the embodiment or design is included in at least one embodiment or design of the present application. Thus, appearances of the phrases "in one embodiment", "in an embodiment", "one design", or "a design" in various places throughout this specification are not necessarily all referring to the same embodiment or design. Furthermore, the particular features, structures, or characteristics can be combined in any suitable

[0036] Referring to Figure 1 The utility model provides a water bag backflow device's embodiment, include: water bag 2, transparent sealed backflow cylinder 1, level piece and air bag 3, sealed backflow cylinder 1 one end with water bag 2 is detachably connected, other end and air bag 3 are communicated through air pipe 34, set up branch pipe 35 for injecting liquid on air pipe 34, detachably install the cap on branch pipe 35, the cap can adopt screw connection between branch pipe 35, convenient to install, dismount. Sealed backflow cylinder 1 is provided with scale line 13, and level piece is arranged in sealed backflow cylinder 1 and is used for detecting whether the liquid surface in sealed backflow cylinder 1 is level. When using, water bag 2 is placed in the uterine cavity of patient, then air bag 3 is fixedly connected with sealed backflow cylinder 1, then the liquid in sealed backflow cylinder 1 is injected into water bag 2 or the liquid in water bag 2 is pumped into sealed backflow cylinder 1 by pressing air bag, while the content of the liquid in sealed backflow cylinder 1 is read by scale line 13, so as to calculate the specific content in water bag 2, if the liquid content in water bag 2 is too much or too little, then the liquid is pumped out or transported through air bag 3, so as to achieve the effect of accurately controlling the liquid content in water bag 2, to ensure that water bag 2 can play its due effect, and meanwhile avoid the situation that the liquid content in water bag 2 is too much, leading to the abnormal increase of the internal pressure of the uterine cavity of patient, reducing the health threat to patient. Meanwhile, if the liquid content to be injected or pumped is too low, the syringe can be inserted into branch pipe 35, and the trace injection and pumping work is carried out through the syringe, to ensure the accurate control of the liquid content in water bag 2. In addition, when using, whether sealed backflow cylinder 1 is placed horizontally is judged through level piece, to ensure the accuracy of scale line 13, so as to accurately control the liquid content in water bag 2.

[0037] In actual use, the end diameter of branch pipe 35 is set to be matched with the size of syringe, to facilitate the injection or pumping of syringe, and after the work is completed, the cap is used to tightly cover the end of branch pipe 35, to ensure the sealing of sealed backflow cylinder 1.

[0038] Referring to Figure 1In the embodiment, the sealing reflux cylinder 1 is provided with an injection port, and a sealing cover 12 for opening and closing the injection port is rotatably installed at the injection port. In use, a sufficient amount of liquid is injected into the sealing reflux cylinder 1 through the injection port to improve the injection efficiency, and the sealing cover 12 is used to seal the injection port after the injection is completed to ensure the sealing of the sealing reflux cylinder 1.

[0039] Embodiment one of the leveling piece:

[0040] Please refer to Figure 1 In the embodiment, the scale line 13 is provided with at least two scale lines, which can be two scale lines. Each scale line 13 has a center line, and the center line of the scale line 13 is parallel to the central axis of the sealing reflux cylinder 1. The center line of one of the scale lines 13 is located on a first plane with the central axis of the sealing reflux cylinder 1, and the center line of the other scale line 13 is located on a second plane with the central axis of the sealing reflux cylinder 1. The first plane is perpendicular to the second plane. The leveling piece is used to coincide with the intersection line of the first plane and the second plane. In use, whether the sealing reflux cylinder 1 is placed horizontally is determined according to whether the center lines of the two scale lines 13 are visually coincident with the leveling piece in two directions.

[0041] Please refer to Figure 2 In the embodiment, the leveling piece includes a first fishing line 4 and a first gravity ball 41. One end of the first fishing line 4 is connected to the inner top wall of the sealing reflux cylinder 1, and the other end of the first fishing line 4 is fixedly connected to the first gravity ball 41. When the sealing reflux cylinder 1 is horizontal, the first fishing line 4 coincides with the intersection line of the first plane and the second plane. In use, the sealing reflux cylinder 1 is placed on the ground or a table, and whether the sealing reflux cylinder 1 is placed horizontally is determined by visually observing whether the center lines of the two scale lines 13 are coincident with the first fishing line 4 in two directions. If not, it indicates that the sealing reflux cylinder 1 is not placed horizontally. At this time, the sealing reflux cylinder 1 is adjusted until the first fishing line 4 coincides with the scale line 13, that is, the horizontal placement of the sealing reflux cylinder 1 is completed. At the same time, the first fishing line 4 is always kept vertically downward under the action of the first gravity ball 41.

[0042] Embodiment two of the leveling piece:

[0043] Please refer to Figures 5-6In the embodiment, the leveler includes a second fishing line 42, a second gravity ball 43 and a positioning circle 44. One end of the second fishing line 42 is connected to the inner top wall of the sealed reflux cylinder 1, and the other end of the second fishing line 42 is fixedly connected with the second gravity ball 43. The positioning circle 44 is fixedly installed on the inner bottom plate of the sealed reflux cylinder 1 and is located directly below the mounting point of the second fishing line 42. When the liquid surface in the sealed reflux cylinder 1 is horizontal, the second gravity ball 43 falls on the positioning circle 44, and the bottom of the second gravity ball coincides with the positioning circle 44. In use, whether the second gravity ball 43 coincides with the positioning circle 44 is observed to determine whether the sealed reflux cylinder 1 is placed horizontally. If the second gravity ball 43 does not coincide with the positioning circle 44, the sealed reflux cylinder 1 is adjusted until the two coincide, that is, the horizontal placement of the sealed reflux cylinder 1 is completed.

[0044] In the embodiment, the first fishing line 4 and the second fishing line 42 can be provided in the form of thin steel wires. The thin steel wires have high stability and are not easy to deform or break due to external forces (such as wind, slight touch, etc.), thereby ensuring the stability of the first fishing line 4 and the second fishing line 42 during the test process, and improving the accuracy of the horizontal test. At the same time, the diameter of the thin steel wire is small, which makes it more visually concealed, thereby helping to reduce the interference of the first fishing line 4 itself on the test result.

[0045] Referring to Figure 1 In the embodiment, the air bag 3 is fixedly connected with a Y-shaped pipe 31, and the two branches of the Y-shaped pipe 31 are respectively provided with an air inlet one-way control valve 32 and an air outlet one-way control valve 33. In use, the air inlet one-way control valve 32 is opened, the air bag 3 is pressed, and gas is injected into the sealed reflux cylinder 1, so that the liquid flows from the sealed reflux cylinder 1 into the water bag 2. The air outlet one-way control valve 33 is opened, the air bag 3 is pressed, and the liquid in the water bag 2 flows back into the sealed reflux cylinder 1. When not in use, the corresponding branches of the Y-shaped pipe 31 can be clamped by a clamp to isolate the flow of gas. In actual use, the air bag 3 can be provided in the size of an adult's palm, which is convenient for medical staff to press the air bag 3.

[0046] Referring to Figure 1 In the embodiment, a hard connection pipe 11 penetrates the sealed reflux cylinder 1, one end of the hard connection pipe 11 penetrates the sealed reflux cylinder 1 and is close to the bottom of the sealed reflux cylinder 1, and the other end is detachably connected with the water bag 2. The hard connection pipe 11 is close to the bottom of the sealed reflux cylinder 1, so that a certain liquid column height can be formed when the liquid flows, thereby helping the smooth discharge and suction of the liquid. In actual use, the hard connection pipe 11 can be made of stainless steel, which has the advantages of excellent corrosion resistance, high temperature resistance and mechanical strength.

[0047] In actual use, the air tube port for connection between the air bag 3 and the sealed reflux cylinder 1 is located at the inner top of the sealed reflux cylinder 1, so as to reduce the air pressure loss and improve the operation efficiency. The specific length of the hard connecting pipe 11 and the air tube in the sealed reflux cylinder 1 can be designed according to the actual situation in actual use, so as to achieve better effect.

[0048] Embodiment one of the connection mode between the water bag 2 and the hard connecting pipe 11:

[0049] Please refer to Figure 1 In this embodiment, the water bag 2 is fixedly connected with the hose 21, the end of the hose 21 is elastically sleeved on the hard connecting pipe 11, and the hose 21 is detachably provided with a flow stop clamp for cutting off the liquid flow. In use, the hose 21 is sleeved on the hard connecting pipe 11 through the elasticity of the hose 21 itself, and achieves the fixing effect, which is convenient for the later liquid conveying and reflux work, and prevents it from slipping off at will. When the hard connecting pipe 11 is disconnected from the hose 21, the end of the hose 21 is folded back for a period of time, and then the flow stop clamp is clamped to prevent the liquid in the water bag 2 from flowing out along the hose 21, which not only affects the effect of the water bag 2, but also easily causes environmental pollution. In actual use, the hose 21 can be made of rubber structure, which is non-toxic and harmless, and has good biocompatibility, and will not cause immune response or inflammatory response, so it is suitable for long-term retention in the body, reduces the discomfort of patients, has good elasticity and flexibility, can adapt to different bending and stretching requirements, and clamps the hard connecting pipe 11 to avoid slipping.

[0050] Embodiment two of the connection mode between the water bag 2 and the hard connecting pipe 11:

[0051] Please refer to Figures 3-4In the embodiment, the water bag 2 is fixedly connected with a hose 21, the end of the hose 21 is fixedly connected with a hard pipe 5, the hollow mounting block 51 is fixedly installed in the hard pipe 5, the spring 52 is fixedly installed on the mounting block 51, one end of the spring 52 is fixedly connected to the mounting block 51, and the other end is fixedly connected with the baffle 53; the extension direction of the spring 52 is parallel to the central axis of the hard pipe 5, the end of the hard pipe 5 is provided with a limiting piece, the baffle 53 abuts against the limiting piece, the diameter of the baffle 53 is smaller than the inner diameter of the hard pipe 5 and larger than the inner diameter of the limiting piece; the end of the hard connecting pipe 11 is fixedly connected with a push rod 54, the diameter of the push rod 54 is smaller than the inner diameter of the hard connecting pipe 11, and the push rod 54 is used for pushing the baffle 53; the hard connecting pipe 11 is clamped with the hard pipe 5 through the limiting piece. In use, one end of the hard connecting pipe 11 is inserted into the hard pipe 5 and clamped with the limiting piece; at the same time, the baffle 53 is pushed backward by the push rod 54 to provide a channel for the flow of liquid, so that the liquid can flow back and forth between the sealed reflux cylinder 1 and the water bag 2. When the baffle 53 moves backward, the spring 52 is compressed, and when the hard connecting pipe 11 is pulled out of the hard pipe 5, the baffle 53 is reset under the elastic deformation of the spring 52, that is, it abuts against the limiting piece, so as to prevent the liquid in the water bag 2 from flowing out. In actual use, the hard pipe 5 can be made of stainless steel structure, which is not easy to deform, so as to avoid affecting the installation and the liquid flow effect in the later period.

[0052] Please refer to Figures 3-4 In the embodiment, the limiting piece is an elastic limiting ring 55, the elastic limiting ring 55 is fixedly installed at the end of the hard pipe 5, and the elastic limiting ring 55 is used for clamping the hard connecting pipe 11. The hard connecting pipe 11 is fixed, so as to avoid accidental slipping of the hard connecting pipe 11 and affect the normal work of the water bag 2. In actual use, the elastic limiting ring 55 can be made of rubber structure, which has good elasticity and can clamp the hard connecting pipe 11 to avoid slipping.

[0053] In actual use, the elastic force of the spring 52 is smaller than that of the elastic limiting ring 55, so as to avoid that the hard connecting pipe 11 is popped out of the hard pipe 5 by the elastic force of the spring 52.

[0054] Please refer to Figures 3-4 In the embodiment, the hard connecting pipe 11, the elastic limiting ring 55 and the baffle 53 are all fixedly sleeved with sealing sleeves 56. After connection, the sealing sleeve 56 on the hard connecting pipe 11 abuts against the sealing sleeve 56 on the elastic limiting ring 55, so as to prevent the liquid from overflowing along the connection between the hard connecting pipe 11 and the elastic limiting ring 55; when not connected, the sealing sleeve 56 on the baffle 53 abuts against the sealing sleeve 56 on the elastic limiting ring 55, so as to prevent the liquid from overflowing along the connection between the baffle 53 and the elastic limiting ring 55. The sealing effect is further achieved through the sealing sleeves 56 on the parts, so as to avoid the liquid flowing disorderly.

[0055] Please refer to Figures 3-4In the embodiment, the front end of the elastic limiting ring 55 is provided as an inclined structure, so that the rigid connecting pipe 11 can be smoothly inserted into the hard pipe 5 during connection.

[0056] In the embodiment, the rigid connecting pipe 11 is detachably sleeved with a sealing sleeve.

[0057] The specific use method of the embodiment is as follows:

[0058] Before use, a sufficient amount of liquid is injected into the sealing reflux cylinder 1 through the injection port, and the water bag 2 is placed in the uterine cavity of the patient, and then the soft tube 21 is fixedly connected with the sealing reflux cylinder 1.

[0059] The air inlet one-way control valve 32 is opened, the air bag 3 is pressed, and the gas is injected into the sealing reflux cylinder 1, so that the liquid flows from the sealing reflux cylinder 1 into the water bag 2.

[0060] The medical staff reads the liquid content in the sealing reflux cylinder 1 according to the reading of the scale line 13 on the sealing reflux cylinder 1, so as to calculate the liquid content in the water bag 2 according to the total amount of the liquid initially injected into the sealing reflux cylinder 1.

[0061] In summary, the water bag 2, the branch pipe 35, the sealing reflux cylinder 1, the scale line 13, the leveling piece and the air bag 3 are matched with each other, the liquid content in the water bag 2 is accurately controlled, the water bag 2 can play its due effect, the liquid content in the water bag 2 is prevented from being too much to cause the internal pressure of the uterine cavity of the patient to be abnormally high, and the health threat to the patient is reduced.

[0062] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A water bladder reflux device, characterized in that, include: The device includes a water bladder, a transparent sealed return tube, a leveling device, and an air bladder. One end of the sealed return tube is detachably connected to the water bladder, and the other end is connected to the air bladder via an air tube. The air tube has a branch tube for injecting liquid. The sealed reflux cylinder is provided with scale lines, and a level is provided inside the sealed reflux cylinder to detect whether the liquid surface inside the sealed reflux cylinder is horizontal.

2. The water bladder reflux device according to claim 1, characterized in that: The scale line is provided with at least two lines, each of which has a center line, and the center line of the scale line is parallel to the central axis of the sealed return cylinder; The center line of one of the scale lines is located in a first plane with the central axis of the sealed reflux cylinder, and the center line of the other scale line is located in a second plane with the central axis of the sealed reflux cylinder. The first plane and the second plane are perpendicular to each other. The level is used to coincide with the intersection line of the first plane and the second plane.

3. The water bladder reflux device according to claim 2, characterized in that: The leveling device includes a first fishing line and a first gravity ball. One end of the first fishing line is connected to the inner top wall of the sealed reflux cylinder, and the other end of the first fishing line is fixedly connected to the first gravity ball. When the liquid surface inside the sealed reflux cylinder is horizontal, the first fishing line coincides with the intersection line of the first plane and the second plane.

4. The water bladder reflux device according to claim 1, characterized in that: The leveling component includes a second fishing line, a second gravity ball, and a positioning circle. One end of the second fishing line is connected to the inner top wall of the sealed reflux cylinder, and the other end of the second fishing line is fixedly connected to the second gravity ball. The positioning circle is fixedly installed on the inner bottom plate of the sealed reflux cylinder and is located directly below the installation point of the second fishing line. When the liquid surface inside the sealed reflux cylinder is horizontal, the second gravity ball falls on the positioning circle, and the bottom of the second gravity ball coincides with the positioning circle.

5. The water bladder reflux device according to claim 1, characterized in that: A Y-shaped tube is fixedly connected to the airbag. An inlet one-way control valve and an outlet one-way control valve are respectively installed on the two branches of the Y-shaped tube. Clips for cutting off gas flow are detachable on the two branches of the Y-shaped tube.

6. The water bladder reflux device according to claim 1, characterized in that: A rigid connecting pipe runs through the sealed return cylinder. One end of the rigid connecting pipe passes through the sealed return cylinder and is close to the bottom of the sealed return cylinder, while the other end is detachably connected to the water bag.

7. The water bladder reflux device according to claim 6, characterized in that: A flexible tube is fixedly connected to the water bladder, and the end of the flexible tube is elastically sleeved on the rigid connecting tube. A flow stop clamp for cutting off the flow of liquid is detachably attached to the flexible tube.

8. The water bladder reflux device according to claim 6, characterized in that: A flexible tube is fixedly connected to the water bladder, and a rigid tube is fixedly connected to the end of the flexible tube. A hollow mounting block is fixedly installed inside the rigid tube, and a spring is fixedly installed on the mounting block. One end of the spring is fixedly connected to the mounting block, and the other end is fixedly connected to a baffle. The extension and retraction direction of the spring is parallel to the central axis of the rigid tube. A limiting member is provided at the end of the rigid tube, and the baffle abuts against the limiting member. The diameter of the baffle is smaller than the inner diameter of the rigid tube and larger than the inner diameter of the limiting member. A push rod is fixedly connected to the end of the rigid connecting tube. The diameter of the push rod is smaller than the inner diameter of the rigid connecting tube, and the push rod is used to push the baffle. The rigid connecting tube and the rigid tube are engaged by the limiting member.

9. The water bladder reflux device according to claim 8, characterized in that: The limiting component is configured as an elastic limiting ring, which is fixedly installed at the end of the rigid pipe and is used to clamp the rigid connecting pipe.

10. The water bladder reflux device according to claim 1, characterized in that: The sealed reflux cylinder has an injection port, and a sealing cover for opening and closing the injection port is rotatably installed at the injection port.

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