Drainage device capable of adjusting negative pressure

Abstract

The utility model relates to a drainage device capable of adjusting negative pressure, which comprises a bottle body, a bottle cap is detachably arranged at the top of the bottle body, a liquid inlet is arranged on one side of the bottle body, and a first communication port is arranged on the other side of the bottle body; the pressure regulating mechanism comprises a cylinder body and a piston, the bottom of the cylinder body is open, a second communication port is formed in the top of the cylinder body, the first communication port is communicated with the second communication port through a pipeline, a first one-way valve is arranged on the pipeline, an exhaust port is further formed in the top of the cylinder body, and a second one-way valve is arranged on the exhaust port. A pressure cavity is defined between the upper surface of the piston and the cylinder body, and a counterweight assembly is further arranged at the bottom of the piston; and the suspension mechanism is arranged at the upper part of the pressure regulating mechanism. The negative pressure in the bottle body is accurately adjusted, the negative pressure level in the bottle body can be adjusted according to needs through the pressure adjusting mechanism, the drainage effect is optimized, meanwhile, stable hanging of the pressure adjusting mechanism is guaranteed through the hanging mechanism, and the use stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical supplies technical field, concretely relates to a drainage device of adjustable negative pressure. BACKGROUND

[0002] Medical drainage bottle is mainly used for collecting and draining liquid, such as blood, pus, urine, etc., they play an important role in operation, first aid and ward nursing, its material quality adopts medical grade plastic or glass, has chemical resistance and biocompatibility, its principle is to use negative pressure to suck the body fluid into the drainage bottle to achieve the drainage effect, at present, in order to improve the quality of drainage, the drainage bottle also has the effect of adjusting the pressure of negative pressure, the existing negative pressure drainage bottle is mostly dependent on manual extrusion of bottle body to adjust negative pressure, when facing the pressure fluctuation in the drainage process, the operation personnel are required to frequently and accurately adjust the extrusion degree, it is difficult to realize the accurate and stable control of pressure, influence the drainage effect, in addition, most of the prior art is limited to handheld operation mode, which limits the flexibility and convenience of use, especially in the case of long-term drainage or patient inconvenience, it is more insufficient, therefore, how to develop a drainage device of adjustable negative pressure, can realize stable and accurate pressure regulation when pressure changes occur in the drainage process, and also can be used in the form of suspension, is the urgent problem to be solved at present. SUMMARY

[0003] In view of the problems in the prior art, the utility model aims at providing a drainage device of adjustable negative pressure, including bottle body, pressure regulating mechanism and suspension mechanism, the pressure in the bottle body is accurately regulated through the pressure regulating mechanism, the stability and efficiency of the drainage process are ensured, the pressure regulating mechanism can be hung to the predetermined position through the suspension mechanism, to improve the stability of the pressure regulating mechanism when regulating the pressure in the bottle body, and when the patient is inconvenient or needs long-term drainage, the burden of the patient can be reduced, and the convenience and comfort of use are improved.

[0004] In order to achieve the above object, the utility model adopts the following technical scheme:

[0005] The adjustable negative pressure drainage device comprises a bottle body, a bottle cap detachably arranged on the top of the bottle body, the bottle body and the bottle cap being configured to form a drainage space for receiving drainage liquid in the interior thereof, a liquid inlet arranged on one side of the bottle body for receiving the drainage liquid, and a first communication port arranged on the other side of the bottle body; a pressure regulating mechanism for generating negative pressure in the drainage space, the pressure regulating mechanism comprising a cylinder and a piston, the bottom of the cylinder being open, the top of the cylinder being provided with a second communication port, the first communication port being in communication with the second communication port through a pipeline, a first one-way valve being arranged on the pipeline for preventing gas from flowing back to the drainage space, and an exhaust port being further arranged on the top of the cylinder for discharging gas, wherein the piston is received in the interior of the cylinder for reciprocating movement, the upper surface of the piston and the cylinder defining a pressure cavity configured to receive gas in the drainage space therein, the bottom of the piston being further provided with a counterweight assembly for driving the piston to reciprocate in the cylinder; and a suspension mechanism arranged on the upper portion of the pressure regulating mechanism for maintaining the stable state of the pressure regulating mechanism.

[0006] Further, the counterweight assembly comprises a connecting rod vertically arranged on the bottom of the piston, the lower end of the connecting rod being provided with a pad, and a plurality of counterweight plates being detachably arranged on the pad.

[0007] Further, the bottom of the counterweight plate has a protrusion, and the top of the counterweight plate has a groove matched with the protrusion.

[0008] Further, the bottom of the cylinder is provided with a limiting ring for limiting the movement range of the piston in the cylinder, the inner surface of the limiting ring having an internal thread, and the bottom of the cylinder having an external thread matched with the internal thread.

[0009] Further, the exhaust port is provided with a second one-way valve for preventing external gas from flowing back to the pressure cavity.

[0010] Further, the liquid inlet is provided with a liquid inlet pipe extending downward into the bottle body.

[0011] Further, the suspension mechanism comprises a hanger, a hollow shell and a mounting plate, one end of the hanger being fixed to the top of the cylinder, the other end of the hanger extending upward and being rotatably connected in the hollow shell, the hollow shell being located below the mounting plate and being elastically connected to the mounting plate through an elastic member, the elastic member enabling the hollow shell to move up and down relative to the mounting plate, and the top of the mounting plate being provided with a clasp.

[0012] Furthermore, the other end of the boom has a connecting block, the hollow housing includes a base with an open top and a cover plate disposed on the top of the base, the bottom of the base has a through hole for receiving the boom, and the connecting block is located within the space enclosed by the base and the cover plate, allowing the boom to rotate relative to the hollow housing.

[0013] Furthermore, the elastic element includes a sliding rod, a sliding sleeve, and a telescopic spring. The sliding rod is fixed to the top of the hollow housing, the sliding sleeve is fixed to the bottom of the mounting plate, the sliding rod is slidably disposed inside the sliding sleeve, and the two ends of the telescopic spring are respectively connected to the hollow housing and the mounting plate, and are located outside the sliding rod and the sliding sleeve.

[0014] Furthermore, the slide rod has a protrusion, the slide sleeve has a groove, and the protrusion is slidably disposed in the groove.

[0015] This utility model has the following advantages:

[0016] This utility model discloses an adjustable negative pressure drainage device comprising a bottle body, a pressure regulating mechanism, and a suspension mechanism. The pressure regulating mechanism precisely controls the negative pressure environment inside the bottle body. A suitable number of counterweights are placed on the surface of a pad, releasing the force on the pad. Under gravity, the piston moves downward at a uniform speed, creating a uniform negative pressure inside the cylinder and bottle body, drawing the drainage fluid into the bottle body. This ensures the continuity and efficiency of the drainage process, effectively improving drainage efficiency. The stability of the negative pressure environment makes the drainage process more reliable, reducing the risk of poor or excessive drainage due to negative pressure fluctuations. The suspension mechanism allows the pressure regulating mechanism to be suspended at a predetermined position, improving its stability when adjusting the pressure inside the bottle body. It also reduces the burden on patients with limited mobility or those requiring prolonged drainage. The suspension mechanism makes the entire pressure regulating process smoother, avoiding pressure fluctuations that may be caused by manual operation, thereby improving the accuracy and safety of drainage. The suspended design offers greater flexibility and convenience, allowing use both in wards and outdoor environments. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an adjustable negative pressure drainage device according to this utility model.

[0018] Figure 2 This is a cross-sectional view of the structure of an adjustable negative pressure drainage device according to this utility model.

[0019] Figure 3 This is a three-dimensional structural diagram of the bottle body and pressure regulating mechanism of this utility model.

[0020] Figure 4It is the three-dimensional exploded view of the bottle body and the pressure regulating mechanism.

[0021] Figure 5 It is another angle of the three-dimensional structure schematic view of the adjustable negative pressure drainage device.

[0022] Figure 6 It is the three-dimensional structure schematic view of the suspension mechanism.

[0023] Figure 7 It is the three-dimensional exploded view of the suspension mechanism.

[0024] 1 is a bottle body, 101 is a bottle cap, 102 is a liquid inlet, 103 is a first communication port, 104 is a drainage space, 105 is a liquid inlet pipe, 106 is a scale line, 2 is a pressure regulating mechanism, 201 is a cylinder, 201a is a second communication port, 201b is an exhaust port, 201c is a pressure chamber, 201d is a limiting ring, 202 is a piston, 203 is a pipeline, 204 is a first one-way valve, 205 is a counterweight assembly, 205a is a connecting rod, 205b is a backing plate, 205c is a counterweight plate, 205c1 is a protrusion, 205c2 is a groove, 206 is a second one-way valve, 3 is a suspension mechanism, 301 is a hanging rod, 301a is a connecting block, 302 is a hollow shell, 302a is a base, 302b is a cover plate, 303 is a mounting plate, 304 is an elastic piece, 304a is a sliding rod, 304a1 is a protruding head, 304b is a sliding sleeve, 304a2 is a sliding groove, 304c is an extension spring, and 305 is a buckle. DETAILED DESCRIPTION

[0025] The following description is merely exemplary in nature and is in no way intended to limit the present application, its application, or uses. It should be understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It will be understood that when an element, component, and / or part is referred to as being "connected to" another element, component, and / or part, it can be directly connected to the other element, component, and / or part or intervening elements can be present. It will be understood that, although the terms "first," "second," etc. can be used herein to describe various elements, components, and / or parts, these elements, components, and / or parts should not be limited by these terms since such terms are only used to distinguish one element, component, or part from another element, component, or part. Thus, a first element, component, or part discussed below could be termed a second element, component, or part without departing from the teachings of the present application. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and / or the

[0026] It is to be understood that the drawings are shown by way of example, and that since the nature of the drawings is largely diagrammatic with respect to details of construction and arrangement of parts, specific numeric labels can not appear proportionally in the drawings and like or similar elements or parts can be indicated by like or similar reference characters. Further, it is to be understood that any embodiment described in this application and including the technical features they comprise can be combined with each other.

[0027] The present application will be further described with reference to the drawings and specific embodiments.

[0028] As Figure 1 and Figure 2As shown, the adjustable negative pressure drainage device comprises a bottle body, a pressure regulating mechanism and a hanging mechanism, the bottle body and the pressure regulating mechanism are arranged in series, the pressure regulating mechanism is arranged at the upper part of the hanging mechanism, the bottle body is used for receiving and storing drainage liquid, the pressure regulating mechanism can control the formation of negative pressure environment in the internal space of the bottle body, ensure the continuity and efficiency of the drainage process, and the hanging mechanism can hang the pressure regulating mechanism to a predetermined position, such as the appropriate height beside the bed or the treatment area, so as to ensure that the pressure regulating mechanism can maintain a stable state during work, and avoid affecting the accuracy of negative pressure regulation due to shaking or tilting.

[0029] As shown, Figures 1-5 The top of the bottle body is detachably provided with a bottle cap, the bottle body and the bottle cap are configured to form a drainage space for receiving drainage liquid in their interiors, the bottle body is cylindrical, the top of which is open, and the bottle body is made of a visual material, and scale lines are arranged on the outer wall of the bottle body along the height direction thereof, for understanding the liquid level of the drainage liquid in the bottle body. The inner wall of the bottle cap has an internal thread, and the outer wall of the upper part of the bottle body has an external thread matched with the internal thread, so that the bottle cap can be threadedly screwed onto the opening of the upper part of the bottle body, so as to form a sealed drainage space in the interior of the bottle body. When it is necessary to lead out the drainage liquid or to clean and maintain the interior of the bottle body, the medical staff only needs to unscrew the bottle cap to complete the relevant operation. One side of the bottle body is provided with a liquid inlet for receiving drainage liquid, and the other side of the bottle body is provided with a first communication port, the height positions of the liquid inlet and the first communication port are substantially the same, and both are located at the upper part of the bottle body. The liquid inlet is detachably provided with a liquid inlet pipe, which extends downward into the bottle body, i.e. the outlet of the liquid inlet pipe faces the bottom of the bottle body, so that the drainage liquid can smoothly enter the interior of the bottle body, avoiding the problem of liquid splashing or accumulating near the bottle opening. The liquid inlet also has a connector for connecting the liquid inlet pipe, and the outer wall of the connector is sealed with the bottle body to avoid air leakage.

[0030] As shown, Figures 1-5As shown, the pressure regulating mechanism is used to generate negative pressure in the drainage space, and the pressure regulating mechanism comprises a cylinder and a piston. The cylinder is generally cylindrical, the bottom of the cylinder is open, and the top of the cylinder is provided with a second communication port. A first communication port is in communication with the second communication port through a pipeline, and a first one-way valve is arranged on the pipeline to prevent gas from flowing back to the drainage space. The first communication port and the second communication port each have a joint, and the two joints are respectively detachably connected with the pipeline. The first one-way valve is arranged on the pipeline close to the bottle body, so that the gas in the bottle body flows unidirectionally through the pipeline into the cylinder. The joints, the pipeline and the first one-way valve are all sealed to ensure air tightness. The pipeline is a flexible tube, so as to adjust the relative position of the cylinder and the bottle body. The length of the flexible tube is redundant in actual use, so as to avoid the pipeline from being accidentally detached from the corresponding joint or the first one-way valve. The top of the cylinder is also provided with a gas outlet for discharging gas. The gas in the bottle body is discharged to the external environment through the gas outlet. The piston is received in the cylinder for reciprocating movement. The upper surface of the piston and the cylinder define a pressure chamber. The pressure chamber is configured to receive the gas in the drainage space therein. The bottom of the piston is also provided with a counterweight assembly for driving the piston to reciprocate in the cylinder. In this embodiment, a second one-way valve is arranged on the gas outlet to prevent external gas from flowing back to the pressure chamber. The joint is detachably connected with the second one-way valve. The second one-way valve can discharge the air in the cylinder when the piston moves upward, and prevent external gas from entering the pressure chamber from the gas outlet when the piston moves downward, so as to form negative pressure in the cylinder. When it is necessary to adjust the pressure in the bottle body, the counterweight assembly drives the piston to move up and down in the cylinder, and cooperates with the first one-way valve and the second one-way valve, so that the gas in the bottle body can flow unidirectionally and smoothly into the pressure chamber in the cylinder through the pipeline. With the downward movement of the piston, the gas in the bottle body is extracted into the pressure chamber, forming a stable negative pressure environment in the bottle body, so that the drainage liquid enters the bottle body. With the upward movement of the piston, the gas in the pressure chamber is compressed and discharged to the external environment through the gas outlet. At the same time, the blocking effect of the first one-way valve and the second one-way valve effectively prevents external gas from flowing back to the pressure chamber or the bottle body when the piston moves downward, ensuring the negative pressure environment. In addition, by adjusting the weight or position of the counterweight assembly, the speed and force of the piston can be accurately controlled, and the precise regulation and control of the negative pressure environment can be realized.

[0031] With reference to the foregoing Figures 1-5The counterweight assembly comprises a connecting rod vertically arranged at the bottom of the piston, the lower end of the connecting rod is provided with a base plate, the base plate is located below the cylinder, and a plurality of counterweight plates are detachably arranged on the base plate to provide a placement platform for the counterweight plates. The plurality of counterweight plates are arranged in a stacked manner on the base plate, and the shape of the base plate is matched with that of the counterweight plates. Through the connecting rod, the base plate and the detachable counterweight plates, medical staff can adjust the counterweight according to actual needs, so as to change the movement speed of the piston in the cylinder and the size of the negative pressure generated in the drainage space. Preferably, the bottom of the counterweight plate has a protrusion, and the top of the counterweight plate has a groove matched with the protrusion. Through the protrusion at the bottom of the counterweight plate and the groove at the top of the counterweight plate, the plurality of counterweight plates can be stably stacked together, avoiding the situation of sliding or mispositioning during use.

[0032] With reference to the foregoing Figures 1-5 , the bottom of the cylinder is provided with a limiting ring for limiting the movement range of the piston in the cylinder. The limiting ring is matched with the shape of the cylinder, the inner surface of the limiting ring has an internal thread, and the bottom of the cylinder has an external thread matched with the internal thread. The cross section of the limiting ring is L-shaped, that is, the limiting ring forms an annular boss at the bottom of the cylinder, and the diameter of the annular boss is smaller than the diameter of the cylinder. When the piston moves downward to the bottom of the cylinder, the annular boss can block the piston from continuing to move downward, effectively limiting the movement range of the piston in the cylinder, and preventing damage or leakage caused by excessive movement of the piston.

[0033] As shown in Figure 1 , 2 , 6 and 7, the suspension mechanism is arranged at the upper part of the pressure regulating mechanism and is used to maintain the stable state of the pressure regulating mechanism. The suspension mechanism comprises a hanging rod, a hollow shell and a mounting plate. One end of the hanging rod is fixed to the top of the cylinder, and the other end of the hanging rod extends upward and is rotatably connected in the hollow shell. The hanging rod is a strip-shaped round rod. The hollow shell is located below the mounting plate and is elastically connected to the mounting plate through elastic members. The elastic members enable the hollow shell to move up and down relative to the mounting plate, thereby effectively absorbing and relieving vibrations from all directions. The top of the mounting plate is provided with a clasp. Through the hanging rod, the hollow shell, the mounting plate and the elastic members, the stable suspension and elastic adjustment of the pressure regulating mechanism are realized. The other end of the hanging rod has a connecting block in a circular structure. The hollow shell comprises a base with an open top and a cover plate arranged at the top of the base. The upper surface of the base has a circular groove for receiving the connecting block. The bottom of the base has a through hole for receiving the hanging rod. The connecting block is located in the space surrounded by the base and the cover plate, so that the hanging rod can rotate relative to the hollow shell, further improving the stability and flexibility of the suspension mechanism. When it is necessary to adjust the pressure, the clasp is hung in the operating environment. When the cylinder is subjected to an upward or downward force, the relative movement of the hollow shell and the mounting plate under the action of the elastic members achieves the buffering of the force.

[0034] With reference to the foregoing Figure 7The elastic member includes a sliding rod, a sliding sleeve and a telescopic spring. The sliding rod is fixed to the top of the hollow shell, the sliding sleeve is fixed to the bottom of the mounting plate, the sliding rod is slidably arranged in the sliding sleeve, and the two ends of the telescopic spring are connected to the hollow shell and the mounting plate respectively and located outside the sliding rod and the sliding sleeve. The elastic member including the sliding rod, the sliding sleeve and the telescopic spring collectively provide the suspension mechanism with the buffering and damping functions. The sliding rod has a protrusion, the sliding sleeve has a sliding groove, and the protrusion is slidably arranged in the sliding groove. Through the protrusion and the sliding groove, the sliding rod can smoothly slide in the sliding sleeve, ensuring the stability and reliability of the elastic member.

[0035] The suspension mechanism is arranged at the upper part of the pressure regulating mechanism, ensuring that the pressure regulating mechanism can maintain a stable state under various working conditions. One end of the hanger rod is connected to the top of the cylinder, and the other end is rotatably connected in the hollow shell, so that the hanger rod can rotate relative to the hollow shell. The hollow shell is located below the mounting plate and is elastically connected thereto by the elastic member, which allows the hollow shell to move up and down relative to the mounting plate when the pressure regulating mechanism is subjected to external force, effectively absorbing and relieving vibrations from all directions. At the same time, the sliding of the sliding rod in the sliding sleeve and the elastic action of the telescopic spring further enhance the buffering and damping capacity of the suspension mechanism. When the pressure regulating mechanism is disturbed by external force, the elastic member can quickly respond by deforming to absorb and disperse the vibration energy, ensuring that the pressure regulating mechanism always maintains a stable suspension and stable state, and the rotation of the hanger rod can also adjust the horizontal angle of the pressure regulating mechanism.

[0036] Based on the above-mentioned adjustable negative pressure drainage device, when in use, the suspension mechanism is hung by the buckle at a suitable height beside the patient bed or in the treatment area, ensuring that the pressure regulating mechanism can maintain a stable state when working. The liquid inlet pipe is connected to the drainage site of the patient, ensuring that the drainage liquid can smoothly enter the inside of the bottle. By adjusting the counterweight assembly, the piston starts reciprocating motion in the cylinder. As the piston moves down, the gas in the bottle is extracted, forming a stable negative pressure environment in the bottle, so that the drainage liquid enters the bottle. As the piston moves up, the gas in the bottle is compressed and discharged to the outside environment through the exhaust port. The liquid level of the drainage liquid in the bottle is observed, the drainage situation is recorded, and the negative pressure size is adjusted or the drainage liquid is replaced as needed.

[0037] In general, the adjustable negative pressure drainage device comprises a bottle body, a pressure regulating mechanism and a suspension mechanism, the internal negative pressure environment of the bottle body is accurately controlled through the pressure regulating mechanism, a proper number of counterweight plates are placed on the surface of the pad plate to release the acting force on the pad plate, the piston moves down at a uniform speed under the action of gravity, the internal uniform negative pressure of the cylinder and the bottle body is generated through cooperation of the piston to suck the drainage liquid into the bottle body, the continuity and efficiency of the drainage process are ensured, and the drainage efficiency is effectively improved. The stability of the negative pressure environment makes the drainage process more reliable, reduces the risk of poor drainage or excessive drainage caused by negative pressure fluctuation. The pressure regulating mechanism can be suspended to a predetermined position through the suspension mechanism to improve the stability of the pressure regulating mechanism when regulating the internal pressure of the bottle body, and the burden of the patient can be reduced when the patient is inconvenient to move or needs long-term drainage. The suspension mechanism makes the entire pressure regulating process more stable, avoids the pressure fluctuation caused by manual operation, and improves the accuracy and safety of drainage. The suspension type usage mode has better flexibility and convenience, and can be used in a ward or an outdoor environment.

[0038] The above embodiment is a preferred embodiment of the utility model, but the embodiment of the utility model is not limited by the above embodiment, and any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the utility model should be an equivalent replacement mode and should be included in the protection scope of the utility model.

Claims

1. An adjustable negative pressure drainage device, characterized in that, The bottle body is detachably provided at the top with a bottle cap, and the bottle body and the bottle cap are configured to form a drainage space for receiving drainage liquid in their interiors, one side of the bottle body is provided with a liquid inlet for receiving drainage liquid, and the other side of the bottle body is provided with a first communication port. A pressure regulating mechanism for generating negative pressure in the drainage space, the pressure regulating mechanism comprising a cylinder and a piston, the bottom of the cylinder is open and the top of the cylinder is provided with a second communication port, the first communication port is communicated with the second communication port through a pipeline, the pipeline is provided with a first one-way valve for preventing gas backflow to the drainage space, and the top of the cylinder is further provided with a gas exhaust port for exhausting gas, wherein the piston is received in the cylinder for reciprocating movement, the upper surface of the piston and the cylinder define a pressure chamber configured to receive gas in the drainage space therein, and the bottom of the piston is further provided with a counterweight assembly for driving the piston to reciprocate in the cylinder. A suspension mechanism is provided on the upper part of the pressure regulating mechanism for maintaining the stable state of the pressure regulating mechanism. The counterweight assembly comprises a connecting rod vertically arranged on the bottom of the piston, the lower end of the connecting rod is provided with a pad, and a plurality of counterweight plates are detachably arranged on the pad.

2. The adjustable negative pressure drainage device of claim 1, wherein, The bottom of the counterweight plate has a protrusion, and the top of the counterweight plate has a groove matched with the protrusion.

3. The adjustable negative pressure drainage device of claim 2, wherein, The bottom of the cylinder is provided with a limiting ring for limiting the movement range of the piston in the cylinder, the inner surface of the limiting ring has an internal thread, and the bottom of the cylinder has an external thread matched with the internal thread.

4. The adjustable negative pressure drainage device of claim 1, wherein, The gas exhaust port is provided with a second one-way valve for preventing external gas from flowing back to the pressure chamber.

5. The adjustable negative pressure drainage device of claim 1, wherein, The liquid inlet is provided with a liquid inlet pipe which extends downward into the bottle body.

6. The adjustable negative pressure drainage device of claim 1, wherein, The suspension mechanism comprises a hanging rod, a hollow shell and a mounting plate, one end of the hanging rod is fixed to the top of the cylinder, the other end of the hanging rod extends upward and is rotatably connected in the hollow shell, the hollow shell is located below the mounting plate and is elastically connected to the mounting plate by an elastic member, the elastic member enables the hollow shell to move up and down relative to the mounting plate, and the top of the mounting plate is provided with a clasp.

7. The adjustable negative pressure drainage device of claim 1, wherein, The other end of the hanging rod has a connecting block, the hollow shell comprises a base with an open top and a cover plate arranged on the top of the base, the bottom of the base has a through hole for receiving the hanging rod, and the connecting block is located in the space surrounded by the base and the cover plate, so that the hanging rod can rotate relative to the hollow shell.

8. The adjustable negative pressure drainage device of claim 7, wherein, The elastic member comprises a sliding rod, a sliding sleeve and a telescopic spring, the sliding rod is fixed to the top of the hollow shell, the sliding sleeve is fixed to the bottom of the mounting plate, the sliding rod is slidably arranged in the sliding sleeve, and the telescopic spring is connected to the hollow shell and the mounting plate at both ends and located outside the sliding rod and the sliding sleeve.

9. The adjustable negative pressure drainage device of claim 7, wherein, The sliding rod has a protrusion, the sliding sleeve has a sliding groove, and the protrusion is slidably arranged in the sliding groove.

10. The adjustable negative pressure drainage device of claim 9, wherein, ​

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