CN108904899B - Portable single-hand operated negative pressure suction device - Google Patents
Portable single-hand operated negative pressure suction device Download PDFInfo
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- CN108904899B CN108904899B CN201810763749.XA CN201810763749A CN108904899B CN 108904899 B CN108904899 B CN 108904899B CN 201810763749 A CN201810763749 A CN 201810763749A CN 108904899 B CN108904899 B CN 108904899B
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- storage tank
- liquid storage
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Abstract
The application discloses a portable negative pressure suction device operated by one hand, which comprises a liquid storage tank, wherein a transparent window is arranged on the side wall of the liquid storage tank; the negative pressure generating mechanism comprises at least one group of piston cavity and a piston, wherein the piston cavity is transversely arranged on the side wall of the liquid storage tank, one part of the piston is slidingly matched in the piston cavity, and a spring is connected between the inner end of the piston and the liquid storage tank; a vent hole is arranged on the side wall between the piston cavity and the inner cavity of the liquid storage tank; the negative pressure regulating mechanism comprises two one-way valves, one is an air inlet valve, and the other is an air outlet valve; the drainage tube is communicated with the liquid storage tank; and a sucker connected to the end of the drainage tube. The negative pressure generating mechanism is arranged on the side wall of the liquid storage tank, and the negative pressure in the liquid storage tank is regulated and controlled in real time through the negative pressure regulating mechanism, so that a stable negative pressure value is formed in the liquid storage tank. The device has simple structure and simple and convenient operation, and is very suitable for the negative pressure suction treatment of small wound surfaces.
Description
Technical Field
The application belongs to the technical field of medical appliances, and particularly relates to a portable single-hand operated negative pressure suction device.
Background
In the professions of orthopaedics, burn department, wound orthopaedics and the like, the requirement of using negative pressure suction to treat wounds is high, the negative pressure suction can timely drain wound exudates, the negative pressure environment is generated to reduce bacterial growth, and the negative pressure environment is favorable for granulation tissue growth and wound repair. The large wound surface needs to be hospitalized and is subjected to suction treatment by using wall negative pressure, and part of the small wound surface can return home to carry out maintenance treatment, so that a portable negative pressure suction device is needed. However, the portable negative pressure suction device used clinically at present is complex, complex in operation, not portable enough, and the use and popularization are affected. In addition, the existing portable negative pressure suction device is difficult to maintain a stable negative pressure value, and is generally characterized in that the negative pressure is larger at the beginning and then gradually reduced, so that the negative pressure suction device is unfavorable for the negative pressure suction treatment of wounds.
Disclosure of Invention
Therefore, the application aims to solve the technical problems that the negative pressure suction device in the prior art is complex, complex in operation and unstable in negative pressure value, and the application aims to provide the portable one-hand-operated negative pressure suction device which is simple in structure, convenient to operate and capable of controlling the constant negative pressure value.
The portable one-hand operated negative pressure suction device of the present application comprises:
the side wall of the liquid storage tank is provided with a transparent window;
the negative pressure generating mechanism comprises at least one group of piston cavities and pistons, the piston cavities are transversely arranged on the side wall of the liquid storage tank, one part of the pistons are slidably matched in the piston cavities, the other part of the pistons are exposed outside, and a spring is connected between the inner end of each piston and the liquid storage tank; a vent hole is arranged on the side wall between the piston cavity and the inner cavity of the liquid storage tank, and the vent hole is sealed by a waterproof air-permeable membrane made of air-permeable and waterproof materials;
the negative pressure regulating mechanism comprises two one-way valves, the two one-way valves are arranged at the top of the liquid storage tank and used for regulating the difference value between the external air pressure and the internal air pressure of the liquid storage tank to be a preset constant pressure difference, one of the two one-way valves is an air inlet valve, the other one of the two one-way valves is an air outlet valve, the opening condition of the air inlet valve is that the difference value between the external air pressure and the internal air pressure of the liquid storage tank is larger than the preset constant pressure difference (the air inlet valve is in a micro-open state when the internal negative pressure of the liquid storage tank does not reach a set value), and the opening condition of the air outlet valve is that the difference value between the external air pressure and the internal air pressure of the liquid storage tank is smaller than the preset constant pressure difference;
the drainage tube is communicated with the liquid storage tank; and
the suction cup comprises a suction cup body, wherein a concave surface is arranged in the middle of the suction surface of the suction cup body, a suction hole is formed in the middle of the concave surface, the suction hole penetrates through the back surface of the suction cup body and extends to form a connecting pipe, and the connecting pipe is connected with the tail end of the drainage tube.
The portable negative pressure suction device operated by one hand can be operated by one hand to generate negative pressure, and is convenient for patients to operate and use. In a natural state, the internal and external air pressures of the liquid storage tank are the same (both are atmospheric pressure), the air inlet valve is closed, and the air outlet valve is opened. When the device is used, only the liquid storage tank is held by one hand, the piston on the side wall is extruded, and air in the piston cavity is forced to enter the liquid storage tank through the waterproof ventilation membrane, so that the air in the liquid storage tank flows out from the air outlet valve. After the hand is loosened, the piston returns under the action of the spring, negative pressure is formed in the piston cavity, air in the liquid storage tank returns to the piston cavity, the negative pressure is gradually increased until the difference between the external air pressure and the internal air pressure of the liquid storage tank is equal to a preset constant pressure difference, and the air outlet valve is closed. When the negative pressure in the liquid storage tank is continuously increased, the difference value between the external air pressure and the internal air pressure of the liquid storage tank is larger than the preset constant pressure difference, and the air inlet valve is opened to enable air to enter until the difference value between the external air pressure and the internal air pressure of the liquid storage tank is equal to the preset constant pressure difference. The air inlet valve and the air outlet valve are matched with each other, and constant negative pressure is formed in the liquid storage tank. After forming invariable negative pressure in the liquid storage tank, the sucking disc can be attached on patient's surface of a wound, and then can in time drain surface of a wound exudates to the liquid storage tank, separates with ventilative impermeable material between liquid storage tank and the piston chamber, prevents that drainage liquid from exposing.
In some preferred embodiments of the present application, an air inlet and an air outlet are provided at the top of the liquid storage tank, and sealing protrusions are provided at the inner periphery of the air inlet and the outer periphery of the air outlet, respectively; each one-way valve comprises a torque spring and a valve plate which are connected with each other, wherein the torque spring of the air inlet valve is arranged beside the inner side of the air inlet, and the valve plate of the air inlet valve is covered on the air inlet and supported by sealing protrusions around the air inlet; the torque spring of the air outlet valve is arranged beside the outer side of the air outlet, and the valve plate of the air outlet valve is covered on the air outlet and supported by the sealing protrusions around the air outlet; in the closed state, torque stress provided by the torque springs of the air inlet valve and the air outlet valve to the valve plate is outwards, and the torque stress is equal to the product of a preset constant pressure difference and the area of the valve plate. In this embodiment, after the negative pressure starts to form in the liquid storage tank through the movement of the piston, when the sum of the acting force of the internal air received by the valve plate of the air outlet valve and the torque stress of the torque spring is insufficient to offset the acting force of the external air, the valve plate will rotate to lean against the sealing protrusion, and the difference between the external air pressure and the internal air pressure of the liquid storage tank is exactly equal to the preset constant pressure difference when the liquid storage tank is closed. When the negative pressure in the liquid storage tank is continuously increased, the sum of the acting force of the internal air received by the valve plate of the air inlet valve and the torque stress of the torque spring is insufficient to offset the acting force of the external air, the valve plate of the air inlet valve is forced to be opened to enable the air to enter until the difference value between the external air pressure and the internal air pressure of the liquid storage tank is equal to a preset constant pressure difference, and then the liquid storage tank is closed. The one-way valve adopts the combined design of the torque spring and the valve plate, so that the one-way valve is simple in structure, torque stress generated by the torque spring is convenient to control, and the preset constant pressure difference can be accurately controlled.
Preferably, the air inlet and the air outlet are also sealed by waterproof air-permeable films made of air-permeable and waterproof materials. Therefore, drainage liquid can be prevented from flowing outwards from the air inlet and the air outlet, and air inlet and outlet are not influenced.
Preferably, the top surface of the sealing protrusion is inclined at an angle of 5-15 degrees. Therefore, the torque spring can be arranged on the liquid storage tank at the lower side of the sealing protrusion, and meanwhile, the valve plate is convenient to install and torque is convenient to adjust.
In some preferred embodiments of the present application, the negative pressure generating mechanism includes two sets of the piston chambers and pistons symmetrically disposed on two sides of the liquid storage tank. The design ensures that the whole device is bilaterally symmetrical and is convenient to assemble.
Preferably, the transparent window is provided with scales. The transparent window is arranged to observe the drainage liquid state in the liquid storage tank at any time, so that the drainage liquid is prevented from overflowing.
Preferably, the outer end surface of the piston is a concave-convex surface fitting the hand holding state. The design makes the device convenient to hold and more convenient to use.
Preferably, a clip is arranged on the drainage tube. The clamp can fix the drainage tube on the clothes of a patient, and the phenomenon that the suction cup is involved due to shaking of the drainage tube during operation is avoided.
The application has the beneficial effects that:
the negative pressure generating mechanism is arranged on the side wall of the liquid storage tank, and negative pressure is provided by the hand-held piston movement mechanism. Meanwhile, the negative pressure in the liquid storage tank is regulated and controlled in real time through the combination of the air inlet valve and the air outlet valve of the negative pressure regulating mechanism, so that a stable negative pressure value can be formed in the liquid storage tank. The device has simple structure and simple and convenient operation, and can be suitable for negative pressure suction treatment of small wound surfaces through connecting sucking disc and other adsorption structures.
Drawings
FIG. 1 is a schematic view of a portable one-hand operated negative pressure suction device of the present application;
FIG. 2 is a schematic diagram of an outlet valve according to the present application;
FIG. 3 is a schematic view of an intake valve according to the present application.
Reference numerals
A liquid storage tank 1 and a transparent window 11;
a negative pressure generating mechanism 2, a piston cavity 21, a piston 22, a spring 23, a waterproof ventilation membrane 24;
the negative pressure regulating mechanism 3, the air inlet valve 31, the air outlet valve 32, the sealing protrusion 311/321, the torque spring 312/322 and the valve plate 313/323;
a drainage tube 4;
suction cup 5, connecting tube 51.
Detailed Description
The application will be further illustrated with reference to specific examples. It should be understood that the following examples are illustrative of the present application and are not intended to limit the scope of the present application.
Example 1
Fig. 1 shows a portable one-hand operated negative pressure suction device according to a preferred embodiment of the present application, which includes: the device comprises a liquid storage tank 1, a negative pressure generating mechanism 2, a negative pressure regulating mechanism 3, a drainage tube 4 and a sucker 5.
The side wall in front of the liquid storage tank 1 is provided with a transparent window 11, and the transparent window 11 is provided with scales.
The negative pressure generating mechanism 2 comprises two groups of piston cavities 21 and pistons 22, the two piston cavities 21 are transversely and symmetrically arranged on the side walls of the two sides of the liquid storage tank 1, one part of the two pistons 22 is respectively and slidably arranged in the corresponding piston cavity 21, the other part of the two pistons is exposed outside, and a spring 23 is connected between the inner end of the piston 22 and the liquid storage tank 1; the upper part of the side wall between the piston cavity 21 and the inner cavity of the liquid storage tank is provided with a vent hole, and the vent hole is sealed by a waterproof vent film 24 made of breathable waterproof material;
the negative pressure regulating mechanism 3 comprises two one-way valves, and the two one-way valves are arranged at the top of the liquid storage tank 1 and are used for regulating and controlling the difference value between the external air pressure and the internal air pressure of the liquid storage tank to be a preset constant pressure difference. One of the two one-way valves is an air inlet valve 31, the other one is an air outlet valve 32, the opening condition of the air inlet valve 31 is that the difference between the external air pressure and the internal air pressure of the liquid storage tank is larger than a preset constant pressure difference (the air inlet valve 31 is in a micro-open state when the internal negative pressure of the liquid storage tank does not reach a set value), and the opening condition of the air outlet valve 32 is that the difference between the external air pressure and the internal air pressure of the liquid storage tank is smaller than the preset constant pressure difference. As shown in fig. 2 and 3, the one-way valve is specifically installed, the top of the liquid storage tank 1 is provided with an air inlet and an air outlet, the periphery of the inner side of the air inlet and the periphery of the outer side of the air outlet are respectively provided with a sealing protrusion 311/321, and the top surface of the sealing protrusion 311/321 is slightly inclined; each one-way valve comprises a torque spring and a valve plate which are connected with each other, wherein the torque spring 312 of the air inlet valve 31 is arranged beside the inner side of the air inlet, and the valve plate 313 of the air inlet valve 31 covers the air inlet and is supported by the sealing protrusion 311 around the air inlet; the torque spring 322 of the air outlet valve 32 is arranged beside the outer side of the air outlet, and the valve plate 323 of the air outlet valve 32 covers the air outlet and is supported by the sealing protrusion 321 around the air outlet; in the closed state, the torque stress F provided by the torque springs of the air inlet valve 31 and the air outlet valve 32 to the valve plate is outward (pointing to the outside of the liquid storage tank), and the torque stress F is equal to the product of the preset constant pressure difference deltap and the area S of the valve plate.
The drainage tube 4 is arranged at the bottom of the liquid storage tank 1 and is communicated with the inside of the liquid storage tank 1.
The middle of the adsorption surface of the sucker 5 is a concave surface, a suction hole is arranged in the middle of the concave surface, the suction hole penetrates to the back surface of the sucker 5 and extends to form a connecting pipe 51, and the connecting pipe 51 is connected with the tail end of the drainage tube 4. Under the condition that the liquid storage tank 1 provides negative pressure, the sucker 5 can be directly adsorbed on the wound surface of a patient to perform negative pressure suction treatment.
The portable negative pressure suction device operated by one hand can be operated by one hand to generate negative pressure, and is convenient for patients to operate and use. In a natural state, the internal and external air pressures of the liquid storage tank 1 are the same (both are the atmospheric pressure P 0 ) The inlet valve 31 is closed and the outlet valve 32 is open. When the device is used, only one hand is needed to hold the two pistons 22, and the air in the piston cavity 21 is forced to enter the liquid storage tank 1 through the waterproof ventilation membrane 24, so that the air in the liquid storage tank 1 flows out from the air outlet valve 32. After the hand is released, the piston 22 returns under the action of the spring 23, and a negative pressure is formed in the piston cavity 21, so that the air in the liquid storage tank 1 returns to the piston cavity 21, and the negative pressure is gradually increased until the sum of the acting force (approximately equal to P) of the internal air received by the valve plate 323 of the air outlet valve 32 and the torque stress F of the torque spring is insufficient to offset the acting force (approximately equal to P) of the external air 0 * S), the valve plate 323 rotates to lean against the sealing protrusion 321, and the air pressure P outside the liquid storage tank is closed 0 The difference from the internal pressure P is exactly equal to the preset constant pressure difference Δp. When the negative pressure in the reservoir 1 continues to increase, the valve plate 313 of the intake valve 31 receives an internal air force (≡p×s) and the torque stress F of the torque spring is not added sufficiently to cancel the external air force (≡p) 0 * S), the valve plate 313 of the air inlet valve 31 is forced to open to allow air to enter until the external air pressure P of the liquid storage tank 1 0 The difference from the internal pressure P is equal to a preset constant pressure difference and then closed. The air inlet valve 31 and the air outlet valve 32 are matched with each other, so that constant negative pressure is formed in the liquid storage tank 1. After forming constant negative pressure in the liquid storage tank 1, the suction disc 5 is attached to the wound surface of a patient and is adsorbed, so that wound surface exudates can be timely drained to the liquid storage tank 1, and a breathable waterproof material is used between the liquid storage tank 1 and the piston cavity 21The waterproof and breathable films 24 are spaced apart to prevent drainage fluid from being exposed. The one-way valve adopts the combined design of the torque spring and the valve plate, so that the structure is simple, the torque stress generated by the torque spring is convenient to control, and the preset constant pressure difference can be accurately controlled.
Preferably, the air inlet and the air outlet can be sealed by a waterproof ventilated membrane made of breathable waterproof materials, so that drainage liquid can be prevented from flowing outwards from the air inlet and the air outlet, and the air inlet and the air outlet are not influenced.
Preferably, the outer end surface of the piston 22 is a concave-convex surface fitting the hand-held state. The design makes the device convenient to hold and more convenient to use.
Preferably, a clip can be arranged on the drainage tube 4. The clamp can fix the drainage tube 4 on the clothes of a patient, and the phenomenon that the suction cup 5 is involved due to shaking of the drainage tube 4 during operation is avoided.
While the preferred embodiments of the present application have been illustrated and described, the present application is not limited to the embodiments, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (8)
1. A portable, single-handed negative pressure suction apparatus, comprising:
the side wall of the liquid storage tank is provided with a transparent window;
the negative pressure generating mechanism comprises two groups of piston cavities and pistons, the two groups of piston cavities and the pistons are symmetrically arranged on two sides of the liquid storage tank, the piston cavities are transversely arranged on the side wall of the liquid storage tank, one part of the pistons are slidably arranged in the piston cavities, the other part of the pistons are exposed outside, and a spring is connected between the inner end of each piston and the liquid storage tank; a vent hole is arranged on the side wall between the piston cavity and the inner cavity of the liquid storage tank, and the vent hole is sealed by a waterproof air-permeable membrane made of air-permeable and waterproof materials;
the negative pressure regulating mechanism comprises two one-way valves, the two one-way valves are arranged at the top of the liquid storage tank and used for regulating and controlling the difference value between the external air pressure and the internal air pressure of the liquid storage tank to be a preset constant pressure difference, one of the two one-way valves is an air inlet valve, the other one of the two one-way valves is an air outlet valve, the opening condition of the air inlet valve is that the difference value between the external air pressure and the internal air pressure of the liquid storage tank is larger than the preset constant pressure difference, and the opening condition of the air outlet valve is that the difference value between the external air pressure and the internal air pressure of the liquid storage tank is smaller than the preset constant pressure difference;
the drainage tube is communicated with the liquid storage tank; and
the suction cup comprises a suction cup body, wherein a concave surface is arranged in the middle of the suction surface of the suction cup body, a suction hole is formed in the middle of the concave surface, the suction hole penetrates through the back surface of the suction cup body and extends to form a connecting pipe, and the connecting pipe is connected with the tail end of the drainage tube.
2. The portable one-hand operated negative pressure suction device according to claim 1, wherein the top of the liquid storage tank is provided with an air inlet and an air outlet, and sealing protrusions are respectively arranged at the inner periphery of the air inlet and the outer periphery of the air outlet; each one-way valve comprises a torque spring and a valve plate which are connected with each other, wherein the torque spring of the air inlet valve is arranged beside the inner side of the air inlet, and the valve plate of the air inlet valve is covered on the air inlet and supported by sealing protrusions around the air inlet; the torque spring of the air outlet valve is arranged beside the outer side of the air outlet, and the valve plate of the air outlet valve is covered on the air outlet and supported by the sealing protrusions around the air outlet; in the closed state, torque stress provided by the torque springs of the air inlet valve and the air outlet valve to the valve plate is outwards, and the torque stress is equal to the product of a preset constant pressure difference and the area of the valve plate.
3. The portable one-hand operated negative pressure suction device according to claim 2, wherein said air inlet and said air outlet are also sealed with a waterproof air-permeable membrane of air-permeable, water-impermeable material.
4. The portable one-hand operated negative pressure suction device according to claim 2, wherein the top surface of the sealing protrusion is inclined at an angle of 5 to 15 degrees.
5. The portable one-handed negative pressure suction apparatus of claim 1, wherein the vent is provided in an upper half of the sidewall between the piston chamber and the reservoir chamber.
6. The portable one-hand operated negative pressure suction device according to claim 1, wherein the piston outer end surface is a concave-convex surface fitting a hand-held state.
7. The portable one-handed negative pressure suction apparatus of claim 1, wherein the transparent window is provided with graduations.
8. The portable one-hand operated negative pressure suction device according to claim 1, wherein a clip is provided on the draft tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810763749.XA CN108904899B (en) | 2018-07-12 | 2018-07-12 | Portable single-hand operated negative pressure suction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810763749.XA CN108904899B (en) | 2018-07-12 | 2018-07-12 | Portable single-hand operated negative pressure suction device |
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| Publication Number | Publication Date |
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| CN108904899A CN108904899A (en) | 2018-11-30 |
| CN108904899B true CN108904899B (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810763749.XA Active CN108904899B (en) | 2018-07-12 | 2018-07-12 | Portable single-hand operated negative pressure suction device |
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| CN (1) | CN108904899B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201001860Y (en) * | 2006-12-28 | 2008-01-09 | 窦修平 | Wound-surface negative enclosed therapeutic system |
| CN201481968U (en) * | 2009-09-03 | 2010-05-26 | 邱燕萍 | Negative-pressure wound drainage device |
| CN202724435U (en) * | 2012-09-12 | 2013-02-13 | 梁伟 | Portable passive vacuum sealing drainage device |
| WO2017079174A1 (en) * | 2015-11-03 | 2017-05-11 | Kci Licensing, Inc. | Apparatus and methods for regulating negative pressure in a negative pressure wound therapy system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI595902B (en) * | 2016-05-10 | 2017-08-21 | 明基材料股份有限公司 | Portable negative-pressure device |
-
2018
- 2018-07-12 CN CN201810763749.XA patent/CN108904899B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201001860Y (en) * | 2006-12-28 | 2008-01-09 | 窦修平 | Wound-surface negative enclosed therapeutic system |
| CN201481968U (en) * | 2009-09-03 | 2010-05-26 | 邱燕萍 | Negative-pressure wound drainage device |
| CN202724435U (en) * | 2012-09-12 | 2013-02-13 | 梁伟 | Portable passive vacuum sealing drainage device |
| WO2017079174A1 (en) * | 2015-11-03 | 2017-05-11 | Kci Licensing, Inc. | Apparatus and methods for regulating negative pressure in a negative pressure wound therapy system |
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| CN108904899A (en) | 2018-11-30 |
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