Body cavity drainage device capable of being connected with negative pressure source

Abstract

The utility model discloses a body cavity drainage device capable of being connected with a negative pressure source. A liquid pouring opening is formed in the rear side face of the hard shell, the liquid storage soft bag is in sealed butt joint with the liquid pouring opening, the top cover is in sealed connection with the hard shell, the change-over valve is arranged in the middle of the top cover, the negative pressure connector is formed in the top cover, the ventilation opening and the pressure control opening are formed in the top cover, and the pressure control pipe is in sealed butt joint with the pressure control opening. A partition plate is arranged in the hard shell and divides an inner cavity of the hard shell into a pressure control cavity and a liquid accumulation cavity, the tops of the pressure control cavity and the liquid accumulation cavity are communicated, the tail end of the pressure control pipe stretches into the bottom of the pressure control cavity, the liquid pouring opening is located in the rear side of the top of the liquid accumulation cavity, and an upper end outlet of the change-over valve can be connected with a drainage pipe. The flat hard shell and the liquid storage soft bag are combined to miniaturize the size of the drainage device, the partition plate divides the hard shell into the pressure control cavity and the liquid accumulation cavity, the tops of the pressure control cavity and the liquid accumulation cavity are communicated with each other, it is ensured that the size of the drainage device is miniaturized, the negative pressure value in the liquid accumulation cavity can be set by comparing the water level in the pressure control cavity, pressure can be stabilized, and risks caused by too high negative pressure are effectively prevented; and a pressure gauge is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical drainage nursing technology especially a body cavity drainage device of can connect negative pressure source. BACKGROUND

[0002] In the medical drainage field, gravity drainage and negative pressure drainage can be used. The negative pressure drainage process usually uses a 15KPA negative pressure source provided by a central negative pressure equipment in a medical place. During use, the negative pressure source pressure of some points may exceed 15KPA due to different use ends and distances. The absolute value of the negative pressure required in the drainage process is usually only about 1KPA, which is much smaller than the pressure value of the negative pressure source. Therefore, the general negative pressure drainage device connects the negative pressure source through a pressure reducing device and a negative pressure gauge to obtain negative pressure with a stable pressure value. The cost of the negative pressure gauge is not low, and it is not suitable for disposable use. It is also troublesome to disassemble and replace the negative pressure drainage device. If the sealing is not good, it will cause air leakage and cause trouble in use. Moreover, the negative pressure gauge can only indicate the pressure and has no stable pressure function. The technical scheme of the traditional negative pressure gauge pressure measurement cannot prevent the risk of internal human body injury caused by excessive negative pressure.

[0003] The controllable water seal negative pressure drainage device disclosed in Chinese utility model patent CN94213562.8 includes a liquid collecting bottle, a water seal bottle, a pressure regulating bottle and a negative pressure chamber. The three-cavity drainage bottle disclosed in Chinese invention patent CN103285434 includes a liquid accumulation bottle, a water seal bottle and a pressure regulating bottle. Both of the two published patent documents connect the bottle bodies through pipelines to form a negative pressure drainage device. The volume of the liquid accumulation bottle has certain specification requirements to accommodate a certain amount of drainage liquid, so that the volume of the entire device is large. Moreover, the seat type drainage device is easy to overturn during use, and once it is overturned, the sealing effect of the water seal bottle will be lost.

[0004] The precision drainage bag disclosed in Chinese utility model patent CN204033868U to prevent liquid backflow includes a bag body and a bottle body. The bag body is connected with the bottle body after being heat sealed with the flow guide plate and the interface to form an integrated drainage device. Although the capacity is expanded, negative pressure drainage and constant negative pressure maintenance cannot be performed.

[0005] The precision urine bag disclosed in Chinese utility model patent CN211325200U includes a soft urine bag and a hard urine box, and a second communication hole is arranged to connect the inner spaces of the two, thereby increasing the capacity of drainage and storage. However, negative pressure drainage cannot be performed, and the negative pressure value of the drainage cannot be adjusted / limited. SUMMARY

[0006] In view of the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a body cavity drainage device which is small in size, can control the negative pressure value simply, can connect a negative pressure source and has a controllable pressure value.

[0007] In order to solve the above technical problems, the utility model adopts the technical scheme: a body cavity drainage device capable of connecting negative pressure source, which comprises a hard shell with a reverse liquid port on the back side, a liquid storage soft bag sealed and connected with the reverse liquid port on the front side, a top cover sealed with the hard shell, a switching valve arranged in the middle part of the top cover, a negative pressure interface arranged on the top cover and connected with the negative pressure source equipment through a negative pressure pipe, a vent hole arranged on the top cover and capable of being used for water injection and pressure reduction, a pressure control port arranged on the top cover, and a pressure control pipe sealed and connected with the pressure control port, wherein a partition plate is arranged in the hard shell to divide the inner cavity into a pressure control cavity and an effusion cavity which are communicated with each other at the top of the hard shell, the end of the pressure control pipe extends into the bottom of the pressure control cavity, the reverse liquid port is located on the back side of the top of the effusion cavity, and the upper end outlet of the switching valve is connectable with a drainage tube.

[0008] As an improvement of the technical scheme of the body cavity drainage device capable of connecting negative pressure source of the utility model, a transverse through hole is arranged between the partition plate and the top cover to communicate the pressure control cavity and the effusion cavity.

[0009] As an improvement of the technical scheme of the body cavity drainage device capable of connecting negative pressure source of the utility model, the switching valve is provided with an outlet above the effusion cavity on the bottom surface of the top cover, and the valve core of the switching valve is adjusted by a rotating handle to control the opening and closing of the drainage passage.

[0010] As an improvement of the technical scheme of the body cavity drainage device capable of connecting negative pressure source of the utility model, the outlet comprises a left outlet and a right outlet, the left outlet is sealed and connected with a water seal pipe extending into the bottom of the effusion cavity, the right outlet extends out of a drainage nozzle and is sealed and sleeved with a valve membrane, the valve core is rotatable to selectively control the left outlet or the right outlet to be communicated with the upper end outlet or to close the drainage passage of the switching valve.

[0011] As an improvement of the technical scheme of the body cavity drainage device capable of connecting negative pressure source of the utility model, the lower end of the water seal pipe is provided with a reverse V-shaped notch, and the lower end of the pressure control pipe is provided with a reverse V-shaped notch.

[0012] As an improvement of the technical scheme of the body cavity drainage device capable of connecting negative pressure source of the utility model, the body cavity drainage device is further provided with a water hole cover capable of sealing the vent hole, and the water hole cover is opened to inject water or reduce pressure through the vent hole.

[0013] As an improvement of the technical scheme of the body cavity drainage device capable of connecting negative pressure source of the utility model, the negative pressure interface is provided with a plug head capable of plugging the outer end opening thereof, the pressure control port protrudes outward to form a pressure control nozzle, and the pressure control nozzle is sleeved with a cap cover.

[0014] As an improvement to the technical solution of the body cavity drainage device that can be connected to a negative pressure source of the present invention, a fence-type crossbeam is provided on the rear side of the top cover for the suspension part on the top of the liquid storage soft bag to surround and connect to form a suspension structure, so that the top of the liquid storage soft bag is stably connected to the crossbeam on the rear side of the top cover; the upper side surface of the top cover is provided with an upwardly protruding hanging ear.

[0015] The present invention provides a beneficial effect by combining a flat rigid shell and a liquid storage bag to form a negative pressure drainage device. The rigid shell is equipped with a top cover for mounting a vent and a pressure control assembly, enabling the drainage device to be miniaturized. A partition is installed within the rigid shell to separate its internal cavity into a pressure control chamber and a fluid accumulation chamber, which are interconnected at the top. A predetermined amount of water is injected into the pressure control chamber, and a pressure control tube is inserted below the liquid level in the pressure control chamber. The upper opening of the pressure control tube is connected to the outside world. The pressure difference between the negative pressure in the pressure control chamber and the outside air is controlled by the water level, thereby controlling the internal pressure to achieve negative pressure drainage. When the pressure difference exceeds the pressure value generated by the height of the water column formed by the water level in the pressure control chamber, outside air is drawn into the pressure control chamber. By setting the water level to the corresponding pressure value, the negative pressure in the fluid accumulation chamber can be controlled to be equal to or less than the pressure value set by the water level when connected to a central negative pressure device, without the need for a pressure gauge, thus providing a protective effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic side perspective structural diagram of a body cavity drainage device that can be connected to a negative pressure source according to the present invention.

[0017] Figure 2 for Figure 1 The figure shows a schematic diagram of the forward structure of a body cavity drainage device that can be connected to a negative pressure source.

[0018] Figure 3 for Figure 2 The diagram shows a forward structural diagram of the main part of the body cavity drainage device that can be connected to a negative pressure source, which is expressed by decomposition; both decomposed parts contain connecting ring covers.

[0019] Figure 4 for Figure 3 The diagram shows a three-dimensional structure of the drainage device main body with the soft liquid storage bag portion removed and the hard shell cut away.

[0020] Figure 5 for Figure 4 The diagram shows the three-dimensional structure of the drainage device main body with the pressure control tube further removed.

[0021] Figure 6 This is a schematic diagram of the three-dimensional structure of the top cover in the drainage device from an oblique upper perspective.

[0022] Figure 7 for Figure 6A schematic diagram of the three-dimensional structure of the top cover from a side and bottom perspective.

[0023] Figure 8 This is a schematic diagram of the first three-dimensional structure of the valve core of the conversion valve in the drainage device.

[0024] Figure 9 for Figure 8 A second three-dimensional structural diagram of the conversion valve core is shown. DETAILED DESCRIPTION

[0025] The specific implementation of the present utility model will be further described below with reference to the accompanying drawings.

[0026] like Figures 1 to 6 As shown, the present invention is a body cavity drainage device that can be connected to a negative pressure source, which includes a hard shell 12, a liquid storage soft bag 16, a top cover 13 sealed with the hard shell 12, a conversion valve 31 provided in the middle of the top cover 13, a negative pressure interface 33 provided on the top cover 13 and connected to the negative pressure source device through a negative pressure pipe, a vent 36 provided on the top cover 13 and used for water injection and pressure reduction, a pressure control port 35 provided on the top cover 13, and a pressure control port 35 sealed with the pressure control port 35. The hard shell 12 is connected to a pressure-control tube 25. The rear side of the hard shell 12 has a liquid pouring port 26. The front side of the liquid storage bag 16 is sealed with the liquid pouring port 26. A partition 21 is provided within the hard shell 12, dividing its internal cavity into a pressure-control chamber 22 and a liquid accumulating chamber 23, which are connected at the top. The end of the pressure-control tube 25 extends into the bottom of the pressure-control chamber 22. The liquid pouring port 26 is located at the rear side of the top of the liquid accumulating chamber 23. The upper outlet 51 of the switching valve 31 can be connected to the drainage tube 11. The front side of the liquid storage bag 16 has an opening corresponding to the liquid pouring port 26 and a connecting ring cover 18 that is welded / sealed to the front diaphragm of the liquid storage bag. The connecting ring cover 18 also forms a sealed connection with the liquid pouring port 26.

[0027] A flat hard shell 12 and a liquid storage bag 16 are combined to form a negative pressure drainage device. The hard shell 12 is provided with a top cover for mounting a vent 36 and a pressure control component, so that the drainage device can be miniaturized. A partition 21 is provided in the hard shell to separate its inner cavity into a pressure control chamber 22 and a liquid accumulation chamber 23, which are connected to each other at the top. A certain amount of water is injected into the pressure control chamber, and a pressure control tube 25 is inserted below the liquid level of the pressure control chamber 22. The upper opening of the pressure control tube 25 is connected to the outside world, so that the pressure difference between the negative pressure of the pressure control chamber and the natural air outside is controlled by the height of the water level, and the internal pressure can be controlled to perform negative pressure drainage. When the difference exceeds the pressure value formed by the height of the water column formed by the water level in the pressure control chamber 22, the outside air is sucked into the pressure control chamber. By setting the water level height and correspondingly setting its pressure value, when the negative pressure source of the central negative pressure device is connected without setting a pressure gauge, the negative pressure value in the effusion chamber 23 (equal to the pressure value of the pressure control chamber 22) is equal to or less than the pressure value set by the water level height. When the pressure value is exceeded, air is sucked in and bubbles are generated in the pressure control chamber 22, forming a gurgling sound. Therefore, there is no need for a negative pressure gauge, and the specific negative pressure value introduced is unknown. The negative pressure can also be adjusted by the water level to set the negative pressure value of the air in the pressure control chamber 22 and the effusion chamber 23. When the absolute value of the pressure provided by the central negative pressure device is extremely high and exceeds the conventional 15KPA, air can be introduced from the pressure control tube 25 to reduce the internal negative pressure value and avoid the negative pressure value exceeding the limit, which causes pressure shock to the drained human body cavity and causes accidental damage. Among them, at the pressure control tube 25, a 10cm high water level can provide a pressure difference of about 1KPA. This pressure difference can be used to compare the pressure difference value with the negative pressure value in the pressure control chamber 22. Air can be sucked in through the pressure control tube 25 to reduce the negative pressure value of the pressure control chamber 22, so that it does not exceed the pressure difference value generated by the water level, thereby limiting the negative pressure in the cavity from being too high. The hard shell 12 is transparent, which is convenient for observing the internal capacity. The hard shell 12 can be set to a bucket shape with flat front and back, which is convenient for arranging it side by side with the liquid storage bag 16 on the rear side, reducing the excessive squeezing of the liquid storage bag 16 that stores a certain amount of accumulated fluid by the hard shell 12.

[0028] The drainage device is equipped with a pressure control tube 25 and a vent 36. It can be used directly with or without a negative pressure source. In the absence of a negative pressure source, lowering the drainage device allows for gravity drainage. Unlike conventional water-sealed bottles that require water before drainage, gravity drainage can be used directly without the need for pre-filling. Simply open the vent 36 to exhaust air and switch the switching valve 31 to the side that connects the right outlet 53 and the flap 54 to initiate gravity drainage.

[0029] Among them, combined Figure 5As shown, a transverse opening 73 is provided between the partition plate and the top cover 13 to connect the pressure control chamber 22 and the effusion chamber 23. The transverse opening 73 allows airflow between the pressure control chamber 22 and the effusion chamber 23 to be connected, maintaining the same air pressure. The negative pressure in the pressure control chamber 22 is equal to the negative pressure in the effusion chamber 23. Controlling the negative pressure in the pressure control chamber controls the negative pressure in the effusion chamber 23.

[0030] Among them, combined Figure 8 、 Figure 9 As shown, the conversion valve 31 is provided with an outlet located above the effusion chamber 23 on the bottom surface of the top cover 13, and the valve core 55 is adjusted by rotating the handle 59 to control the opening and closing of the drainage channel. When opened, it can connect the human body cavity and the effusion chamber 23 to drain liquid and gas, and when closed, the drainage channel is cut off. Furthermore, the outlet includes a left outlet 52 and a right outlet 53. The left outlet 52 is sealed with a water seal tube 28 extending into the bottom of the effusion chamber, and the right outlet 53 extends a drainage nozzle and is sealed with a valve 54. The rotation of the valve core can selectively control the left outlet 52 or the right outlet 53 to be connected to the upper end outlet 51, or close the drainage path of the conversion valve 31. A flow channel is provided in the valve core 55 in the shape of a rotating body, and the flow channel is provided with a long upper opening 58 and a circular lower opening 56 on the circumference of the valve core 55. During the rotation of the valve core 55, the lower opening 56 can be aligned with the left outlet 52, the right outlet 53, and the middle sealing surface respectively, while the elongated upper opening 58 is always connected to the upper outlet 51, so that the channel can be switched or closed. The valve 54 will be closed by fitting the front and rear membranes together under the action of external pressure, and it is set in the effusion cavity 23 with negative pressure, and it can always be opened for drainage; when the negative pressure value of the body cavity exceeds the negative pressure of the effusion cavity 23, the valve 54 will also be closed to prevent backflow. When the liquid soaks over the lower edge of the valve 54, it will be closed; the valve 54 can naturally expand and close under the conditions of natural drainage and no negative pressure in the effusion cavity 23. When the rotating conversion valve 31 is connected to the water seal tube 28, natural drainage can be carried out, and a water seal will be formed when the effusion overflows the lower opening of the water seal tube.

[0031] When drainage is performed through the passage of the valve 54, the negative pressure of the effusion cavity 23 plays an auxiliary role, which is conducive to the expansion of the lungs and squeezes out the gas outside the lungs remaining in the body cavity.

[0032] Furthermore, an inverted V-shaped cutout is provided at the lower end of the water seal tube 28; an inverted V-shaped cutout is provided at the lower end of the pressure control tube 25, which is more conducive to the gas entering the pressure control chamber 22 / fluid accumulation chamber 23 and more accurate pressure control.

[0033] Among them, combined Figure 4 、 Figure 6As shown, the body cavity drainage device is also provided with a water port cover capable of sealing the vent 36. Opening the water port cover can inject water into the pressure control chamber 22 through the vent 36 serving as a liquid filling port. A certain range of pressure reduction can be achieved through the vent 36. The pressure reduction is stepwise and the pressure reduction range is relatively fixed. The pressure reduction range is determined by the size of the vent diameter. The pressure can be reduced from 15 kPa to 7 kPa. When the body cavity drainage device is used for gravity drainage, opening the vent 36 also plays a role of exhaust. That is, the vent 36 has three functions: liquid filling, pressure adjustment, and exhaust when there is no negative pressure. The water port cover can be a screw cap or a plug blocking the vent.

[0034] Opening the water port cover can adapt a water injection funnel to the liquid filling port to inject water into the pressure control chamber 22 through the water injection funnel to form a certain water level height and a set pressure difference for pressure control, avoiding excessive negative pressure in the effusion chamber 23.

[0035] The negative pressure interface 33 is provided with a plug capable of blocking the outer end opening thereof. In the non-use state, the plug can separate the inside and outside of the connector to prevent pollution and affect use. The pressure control port 35 protrudes outward to form a pressure control nozzle 85. The pressure control nozzle 85 is sleeved with a cap 86 to protect the pressure control nozzle 85.

[0036] The rear side of the top cover 13 is provided with a fence type beam 37 for the suspension part of the top of the liquid storage soft bag 16 to surround and connect to form a suspension structure. The beam 37 and the top cover body part form an elongated hole 38. The suspension part of the top of the liquid storage soft bag 16 passes through the hole to embrace the beam 37. Thus, the liquid storage soft bag 16 can be hung on the fence type beam 37 to form a drainage device with the hard shell 12 and the liquid storage soft bag 16 arranged side by side in front and back. The top of the liquid storage soft bag 16 is stably connected to the beam 37 at the rear side of the top cover 13. In combination with the combined fusion connection structure at the liquid pouring port 26, the hard shell 12 and the liquid storage soft bag 37 form a stably connected and combined drainage device. The positions of the hard shell 12 and the liquid storage soft bag 37 are relatively stable and will not sway or slide relative to each other.

[0037] The upper side of the top cover 13 is provided with an upwardly protruding hanging ear 39. The drainage device can be hung at a suitable position by connecting a hanging rope.

[0038] The above disclosure is only the preferred embodiment of the utility model and cannot limit the scope of the utility model. Therefore, equivalent changes made in the scope of the utility model patent application still fall within the scope of the utility model.

Claims

1. A body cavity drainage device connectable to a negative pressure source, comprising a rigid housing with a liquid pouring port on its rear side, a liquid storage bag sealably connected to the liquid pouring port on its front side, a top cover sealably connected to the rigid housing, and a switching valve located in the middle of the top cover, characterized in that: It also includes a negative pressure interface provided on the top cover and connected to the negative pressure source device through a negative pressure tube, a vent provided on the top cover and used for water injection and pressure reduction, a pressure control port provided on the top cover, and a pressure control tube sealed and docked with the pressure control port. A partition is provided in the hard shell to separate its inner cavity into a pressure control chamber and a liquid accumulation chamber that are connected to each other at the top. The end of the pressure control tube extends to the bottom of the pressure control chamber, the liquid pouring port is located on the rear side of the top of the liquid accumulation chamber, and the upper outlet of the conversion valve can be connected to the drainage tube.

2. The body cavity drainage device connectable to a negative pressure source according to claim 1, characterized in that: A transverse through hole communicating with the pressure control cavity and the liquid accumulation cavity is left between the partition plate and the top cover.

3. The body cavity drainage device connectable to a negative pressure source according to claim 1, characterized in that: The conversion valve is provided with an outlet located above the liquid accumulation cavity on the bottom surface of the top cover, and the valve core is adjusted by rotating the handle to control the opening and closing of the drainage channel.

4. The body cavity drainage device connectable to a negative pressure source according to claim 3, characterized in that: The outlet includes a left outlet and a right outlet, the left outlet is sealedly connected to a water seal tube extending into the bottom of the effusion chamber, and the right outlet extends a drainage nozzle and is sealed with a valve; the rotation of the valve core can selectively control the left outlet or the right outlet to be connected to the upper end outlet, or close the drainage path of the conversion valve.

5. The body cavity drainage device connectable to a negative pressure source according to claim 4, characterized in that: The lower end of the water seal pipe is provided with an inverted V-shaped cutout; the lower end of the pressure control pipe is provided with an inverted V-shaped cutout.

6. The body cavity drainage device connectable to a negative pressure source according to claim 1, characterized in that: The body cavity drainage device is further provided with a water inlet cover which can seal the vent. The water inlet cover can be opened to inject water or reduce pressure through the vent.

7. The body cavity drainage device connectable to a negative pressure source according to claim 1, characterized in that: The negative pressure interface is provided with a plug which can plug the outer end opening thereof; the pressure control port protrudes outward to form a pressure control nozzle, and the pressure control nozzle is sleeved with a cap.

8. The body cavity drainage device connectable to a negative pressure source according to claim 1, characterized in that: A fence-type crossbeam is provided on the rear side of the top cover for the suspension part on the top of the liquid storage soft bag to surround and connect to form a suspension structure, so that the top of the liquid storage soft bag is stably connected to the crossbeam on the rear side of the top cover; an upwardly protruding hanging ear is provided on the upper side of the top cover.

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