Constant-pressure negative-pressure drainage device

Abstract

Air inlets are formed in the upper side and the lower side of the left end of a negative pressure tank respectively, the outer ends of the air inlets are connected with branch pipes, the two branch pipes are connected through a guide pipe, the other end of the guide pipe is connected with a hard drainage bottle with scales to generate negative pressure, and the drainage bottle is hard, so that deformation is avoided during drainage; the device further comprises two blocking mechanisms which are arranged in the negative pressure tank and used for alternately blocking the air inlet, the blocking mechanisms can move downwards through gravity to generate constant negative pressure, the blocking mechanisms alternately block the air inlet up and down, and therefore air enters one side to generate negative pressure, the other side is blocked, and the blocking conditions are opposite after the negative pressure tank is reversed up and down.

Description

Technical Field

[0001] The invention relates to the field of constant pressure negative pressure drainage, in particular to a constant pressure negative pressure drainage device. Background Art

[0002] If there is fluid accumulation in the patient's body, it will be drained through a drainage tube and a drainage bottle. The drainage bottle generates negative pressure, and the accumulated fluid in the body is drained out through the drainage tube. Currently, the soft form used is a negative pressure drainage bag, which is relatively soft and lightweight. However, as the amount of liquid increases, the bag body deforms, the scale does not correspond, and it is not accurate enough. There is also a hard drainage bottle, which is connected to an air bag, and negative pressure is generated in the drainage bottle by squeezing. This drainage bottle has a fixed shape, and the liquid capacity corresponds to the scale. However, the disadvantage is that the air bag needs to be squeezed repeatedly. The air bag is too large, which can reduce the number of times, but it is not easy to rebound, and the negative pressure effect is not good. Moreover, the negative pressure is not constant. Therefore, how to achieve constant negative pressure and facilitate operation is an urgent problem that technicians in this field need to solve. Summary of the invention

[0003] The purpose of the present invention is to provide a constant pressure negative pressure drainage device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a constant pressure negative pressure drainage device, wherein the upper and lower sides of the left end of the negative pressure tank are respectively provided with air inlets, the outer ends of the air inlets are connected with branch pipes, the two branch pipes are connected by a catheter, and the other end of the catheter is connected to a hard drainage bottle with a scale to generate negative pressure. The drainage bottle is hard so that it will not be deformed during drainage and is more accurate. It also includes two blocking mechanisms arranged in the negative pressure tank for alternately blocking the air inlets, the blocking mechanisms can use gravity to move downward to generate constant negative pressure, and the blocking mechanisms alternately block the air inlets up and down, so that negative pressure is generated when air is inlet on one side and the other side is blocked, and the blocking situation is opposite after being turned upside down.

[0005] Preferably, the blocking mechanism includes two matching blocking blocks installed in the negative pressure tank and capable of sliding up and down, a sealing ring can be arranged around the blocking block, and an air inlet hole which can be connected to the corresponding air inlet to the left is opened in the middle of the blocking block, a through hole which runs through the blocking block and is connected to the air inlet hole is opened in the middle of the blocking block, the two blocking blocks are connected by a plurality of vertical guide rods, a movable gap is left between the upper blocking block and the top of the inner cavity of the negative pressure tank, and the air inlet hole is connected to a through hole which is connected to the movable gap. The balancing hole can ensure the pressure balance of the movable gap when it is vertical. When it is vertical, the upper air inlet hole is opposite to the upper air inlet port, and the upper and lower air inlet holes are located below the lower air inlet port to achieve blocking. A counterweight mechanism that generates negative pressure is also arranged between the two blocking blocks. When the counterweight mechanism moves downward by gravity, negative pressure is generated on the upper side, and negative pressure is generated through the upper through holes, air inlet holes, air inlet port and upper branch pipes. The lower branch pipe remains sealed because the lower air inlet port is blocked.

[0006] Preferably, the counterweight mechanism includes a piston block which is arranged between two sealing blocks and is sleeved on a guide rod and moves downward by gravity. A guide hole corresponding to the guide rod is arranged on the piston block, and a sealing ring is arranged. The piston block is adapted to the negative pressure tank, and a sealing ring is also arranged on the circumference of the piston block. It also includes an exhaust mechanism connected to the through hole at the opposite ends of the two sealing blocks. The exhaust mechanism can exhaust from the bottom in a vertical state to maintain the pressure balance on the lower side of the piston block. When the piston block moves downward, the gas on the lower side must be discharged and the upper side must be closed to ensure unique air intake and exhaust.

[0007] Preferably, the exhaust mechanism includes support legs fixed on the circumference of the upper and lower ends of the negative pressure tank, the upper and lower ends of the negative pressure tank are connected with guide tubes with outer ends opened and connected to the inner cavity, the support legs are pulled apart to ensure air permeability, and two sealing blocks are fixed with exhaust pipes with closed outer ends that can be inserted into the guide tubes. Sealing rings can be arranged around the exhaust pipes to ensure sealing, the inner ends of the exhaust pipes are connected with the through holes, and exhaust holes are arranged on the circumference of the exhaust pipes. When the negative pressure tank is in a vertical state, the exhaust holes on the lower side extend out of the guide tube on the lower side to achieve exhaust. At this time, the exhaust holes on the lower side are located on the outside to exhaust and discharge the gas on the lower side of the piston block. The exhaust holes on the upper side are located in the guide tube on the upper side to achieve sealing. The exhaust holes on the upper side are located in the guide tube on the upper side to play a sealing role.

[0008] Preferably, the piston block has an internal hollow structure, and the piston block is connected to a pressure regulating mechanism that can be filled with water to change the pressure, thereby changing the gravity of the piston block. The piston block can be made of stainless steel or lead, and the friction force and negative pressure can be combined for flexible use.

[0009] Preferably, the pressure regulating mechanism includes a soft water pipe connected to the inner cavity of the piston block, and the water pipe is connected to a water bag after extending upward from the sealing block and the negative pressure tank, and a switch for clamping is provided on the water pipe. Here, the water pipe is located in the movable gap between the piston block and the upper sealing block, and can be bent so that the piston block can be pulled down and stretched. At the same time, a groove can also be provided at the upper end of the upper sealing block to facilitate the storage of the folded water pipe, because the water pipe is fixedly connected to the negative pressure tank to avoid air leakage and folding when stored.

[0010] Preferably, the water bag is a soft latex bag so as to apply force by squeezing. When flushing, the switch can be turned on by squeezing. When pouring back, it can be downward, the water flows back, and the gas floats into the piston block and expands by gravity. Although it has toughness, the tension is reduced as much as possible to facilitate downstream flow.

[0011] Preferably, the water bag is made of transparent material to facilitate observation of the internal gas and water.

[0012] Preferably, the negative pressure tank is made of transparent plastic material to facilitate observation of the internal conditions and the position of the piston block.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. When in use, it is set vertically. Under the action of gravity, the two blocking blocks move downward synchronously under the connection of the guide rod. The balance hole ensures the pressure balance on the opposite sides of the two blocking blocks. The air inlet hole on the upper blocking block corresponds to the air inlet on the upper side to generate a negative pressure channel, while the air inlet hole on the lower blocking block is staggered with the air inlet on the lower side and is located on the lower side of the air inlet on the lower side to achieve blockage. The piston block moves downward along the guide rod, thereby generating a negative pressure cavity between the upper blocking block and the upper blocking block, and generating a negative pressure channel through the upper through hole, the upper air inlet and the upper branch pipe to drain the drainage bottle. At this time, the upper exhaust hole is blocked in the guide tube to achieve sealing, and the lower exhaust hole extends out of the guide tube to achieve exhaust. In this way, the gravity of the piston block is used to generate negative pressure, and the gravity of the piston block is constant, and the negative pressure is constant; 2. When the piston reaches the bottom, turn the negative pressure tank upside down and repeat the above actions to continue to generate negative pressure. Here, the operation is simple and you only need to flip it. In addition, the volume of the negative pressure tank here can be half of that of the drainage bottle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the bottom through hole of the present invention; Figure 3 It is a front view of the present invention; Figure 4 is an axonometric view of the present invention; Figure 5 An exploded view of the present invention; Figure 6 FIG. 2 is a schematic structural diagram of a second embodiment of the present invention.

[0015] In the figure: 1. negative pressure tank; 2. branch pipe; 3. conduit; 4. blocking block; 5. air inlet; 51. balance hole; 6. guide rod; 7. piston block; 8. through hole; 9. supporting leg; 10. guide tube; 11. exhaust pipe; 12. exhaust hole; 13. water pipe; 14. water bag; 15. switch. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Example 1 See also Figures 1 to 5 The present invention provides a technical solution for a constant-pressure negative pressure drainage device: a constant-pressure negative pressure drainage device, wherein air inlets are respectively provided on the upper and lower sides of the left end of a negative pressure tank 1, and the outer end of the air inlet is connected to a branch pipe 2, the two branch pipes 2 are connected by a catheter 3, and the other end of the catheter 3 is connected to a hard drainage bottle with a scale to generate negative pressure. The drainage bottle is hard so that it will not be deformed during drainage and is more accurate. It also includes two blocking mechanisms arranged in the negative pressure tank 1 for alternately blocking the air inlet, the blocking mechanism can move downward by gravity to generate a constant negative pressure, and the blocking mechanism blocks the air inlet alternately up and down, so that negative pressure is generated by air intake on one side and the other side is blocked, and the blocking situation is opposite after being turned upside down.

[0018] The blocking mechanism includes two matching blocking blocks 4 installed in the negative pressure tank 1 and capable of sliding up and down. A sealing ring can be arranged around the blocking block 4, and an air inlet 5 which can be connected to the corresponding air inlet to the left is opened in the middle of the blocking block 4. A through hole 8 which runs through the blocking block 4 and is connected to the air inlet 5 is opened in the middle of the blocking block 4. The two blocking blocks 4 are connected by a plurality of vertical guide rods 6. A movable gap is left between the upper blocking block 4 and the top of the inner cavity of the negative pressure tank 1, and the air inlet 5 is connected to a balancing hole which is connected to the movable gap. 51, the balance hole 51 can ensure the pressure balance of the movable gap when it is vertical. When it is vertical, the upper air inlet hole 5 is opposite to the upper air inlet port, and the upper and lower air inlet holes 5 are located on the lower side of the lower air inlet port to achieve blocking. A counterweight mechanism for generating negative pressure is also arranged between the two blocking blocks 4. When the counterweight mechanism moves downward by gravity, negative pressure is generated on the upper side, and negative pressure is generated through the upper through hole 8, the air inlet hole 5, the air inlet port and the upper branch pipe 2 to exhaust air. The lower branch pipe 2 remains sealed because the lower air inlet port is blocked.

[0019] The counterweight mechanism includes a piston block 7 which is arranged between two blocking blocks 4 and is sleeved on a guide rod 6 and moves downward by gravity. A guide hole corresponding to the guide rod 6 is arranged on the piston block 7, and a sealing ring is arranged. The piston block 7 is adapted to the negative pressure tank 1, and a sealing ring is also arranged around the piston block 7. The negative pressure tank 1 is made of transparent plastic material to facilitate observation of the internal situation and the position of the piston block 7.

[0020] It also includes an exhaust mechanism connected to the through hole 8 and arranged at the opposite end of the two blocking blocks 4. The exhaust mechanism can exhaust from the bottom in a vertical state to maintain the pressure balance on the lower side of the piston block 7. When the piston block 7 moves downward, the gas on the lower side must be discharged and the upper side must be closed to ensure unique air intake and exhaust.

[0021] The exhaust mechanism includes support legs 9 fixed on the circumference of the upper and lower ends of the negative pressure tank 1. The upper and lower ends of the negative pressure tank 1 are connected to a guide tube 10 with an outer end opening that is connected to the inner cavity. The support legs 9 are pulled apart to ensure air permeability, and the two blocking blocks 4 are fixed with an exhaust pipe 11 with a closed outer end that can be inserted into the guide tube 10. A sealing ring can be arranged around the exhaust pipe 11 to ensure sealing. The inner end of the exhaust pipe 11 is connected to the through hole 8, and exhaust holes 12 are arranged on the circumference of the exhaust pipe 11. When the negative pressure tank 1 is in a vertical state, the exhaust hole 12 on the lower side extends out of the guide tube 10 on the lower side to achieve exhaust. At this time, the exhaust hole 12 on the lower side is located on the outside to exhaust and discharge the gas on the lower side of the piston block 7. The exhaust hole 12 on the upper side is located in the guide tube 10 on the upper side to achieve sealing. The exhaust hole 12 on the upper side is located in the guide tube 10 on the upper side to achieve sealing.

[0022] Example 2 like Figure 6As shown, on the basis of Example 1, as a preferred mode, the piston block 7 is an internal hollow structure, and the piston block 7 is connected to a pressure regulating mechanism that can be filled with water to change the pressure, so as to change the gravity of the piston block 7. Here, the piston block 7 can be made of stainless steel or lead, and can be used flexibly in combination with the friction force and the negative pressure size. The pressure regulating mechanism includes a soft water pipe 13 connected to the inner cavity of the piston block 7, and the water pipe 13 is connected to a water bag 14 after extending upward from the blocking block 4 and the negative pressure tank 1, and a switch 15 for clamping is provided on the water pipe 13. Here, the water pipe 13 is located in the movable gap between the piston block 7 and the upper side blocking block 4, and can be bent so that the piston block 7 can be pulled down and stretched. At the same time, a groove can also be provided on the upper end of the upper side blocking block 4 to facilitate the storage of the folded water pipe 13, because the water pipe 13 is fixedly connected to the negative pressure tank 1 to avoid air leakage, and there will be folding when stored.

[0023] The water bag 14 is a soft latex capsule for squeezing and pressing. When flushing, the switch 15 can be opened by squeezing. When pouring back, the water can flow back downward, and the gas floats into the piston block 7 and expands by gravity. Although it has toughness, it can reduce tension as much as possible to facilitate downflow. The water bag 14 is made of transparent material, which is convenient for observing the internal gas and water.

[0024] Working principle: when in use, it is set vertically. Under the action of gravity, the two blocking blocks 4 move downward synchronously under the connection of the guide rod 6. The balance hole 51 ensures that the pressure on the opposite sides of the two blocking blocks 4 is balanced. The air inlet hole 5 on the upper blocking block 4 corresponds to the air inlet on the upper side to generate a negative pressure channel, while the air inlet hole 5 on the lower blocking block 4 is staggered with the air inlet on the lower side and is located on the lower side of the air inlet on the lower side to achieve blocking. The piston block 7 moves downward along the guide rod 6, thereby producing a negative pressure chamber between the upper blocking block 4, and a negative pressure channel is produced through the upper through hole 8, the upper air inlet hole 5 and the upper branch pipe 2 to drain the drainage bottle. At this time, the upper exhaust hole 12 is blocked in the guide tube 10 to achieve sealing, and the lower exhaust hole 12 extends out of the guide tube 10 to achieve exhaust. In this way, the gravity of the piston block 7 is used to generate negative pressure, and the gravity of the piston block 7 is constant, and the negative pressure is constant; When the piston block 7 reaches the bottom, the negative pressure tank 1 is turned upside down, and the above actions are repeated to continue to generate negative pressure. Here, the operation is simple, and only needs to be turned over. In addition, the volume of the negative pressure tank 1 here can be half of that of the drainage bottle.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A constant pressure negative pressure drainage device, comprising a negative pressure tank (1) with a square inner cavity cross section, characterized in that: The negative pressure tank (1) is provided with air inlets at the upper and lower sides of the left end, respectively; the outer ends of the air inlets are connected to branch pipes (2); the two branch pipes (2) are connected via a conduit (3); and the other end of the conduit (3) is connected to a hard drainage bottle with a scale to generate negative pressure. The negative pressure tank (1) also includes two blocking mechanisms for alternately blocking the air inlets, which can be moved downward by gravity to generate a constant negative pressure.

2. The constant pressure negative pressure drainage device according to claim 1, characterized in that: The blocking mechanism comprises two matching blocking blocks (4) installed in the negative pressure tank (1) and capable of sliding up and down, and an air inlet (5) is provided in the middle of the blocking block (4) and is connected to the corresponding air inlet to the left, and a through hole (8) is provided in the middle of the blocking block (4) and is connected to the air inlet (5) and is passed through from top to bottom. The two blocking blocks (4) are connected by a plurality of vertical guide rods (6), and a movable gap is left between the upper blocking block (4) and the top of the inner cavity of the negative pressure tank (1), and the air inlet (5) is connected to a balancing hole (51) connected to the movable gap. When vertically, the upper air inlet (5) faces the upper air inlet, and the lower air inlet (5) is located below the lower air inlet to achieve blocking, and a counterweight mechanism for generating negative pressure is also provided between the two blocking blocks (4).

3. The constant pressure negative pressure drainage device according to claim 2, characterized in that: The counterweight mechanism comprises a piston block (7) which is arranged between the two blocking blocks (4) and sleeved on the guide rod (6) and moves downward by gravity, and the piston block (7) is adapted to the negative pressure tank (1). A through hole (8) which runs through the blocking block (4) and is connected to the air inlet (5) is provided in the middle of the blocking block (4). The counterweight mechanism also comprises an exhaust mechanism which is arranged at the opposite ends of the two blocking blocks (4) and is connected to the through hole (8). The exhaust mechanism can exhaust air from the bottom in a vertical state to maintain the pressure balance on the lower side of the piston block (7).

4. The constant pressure negative pressure drainage device according to claim 3, characterized in that: The exhaust mechanism comprises support legs (9) fixed on the circumference of the upper and lower ends of the negative pressure tank (1); the upper and lower ends of the negative pressure tank (1) are both connected to a guide tube (10) with an outer end open and communicating with the inner cavity; and two blocking blocks (4) are fixed with an exhaust pipe (11) with an outer end closed and capable of being inserted into the guide tube (10) and adapted to fit therein; the inner end of the exhaust pipe (11) is connected to the through hole (8), and exhaust holes (12) are provided on the circumference of the exhaust pipe (11); when the negative pressure tank (1) is in a vertical state, the exhaust hole (12) on the lower side extends out of the guide tube (10) on the lower side to achieve exhaust, and the exhaust hole (12) on the upper side is located in the guide tube (10) on the upper side to achieve blocking.

5. The constant pressure negative pressure drainage device according to claim 4, characterized in that: The piston block (7) has an internal hollow structure, and the piston block (7) is connected to a pressure regulating mechanism capable of filling water to change the pressure.

6. The constant pressure negative pressure drainage device according to claim 5, characterized in that: The pressure regulating mechanism comprises a soft water pipe (13) in communication with the inner cavity of the piston block (7), and the water pipe (13) is connected to a water bag (14) after extending upward from the blocking block (4) and the negative pressure tank (1), and a switch (15) for clamping is provided on the water pipe (13).

7. The constant pressure negative pressure drainage device according to claim 6, characterized in that: The water bag (14) is a soft latex capsule that can be squeezed and pressed to apply force.

8. The constant pressure negative pressure drainage device according to claim 7, characterized in that: The water bag (14) is made of transparent material.

9. The constant pressure negative pressure drainage device according to claim 3, characterized in that: The negative pressure tank (1) is made of transparent plastic material to facilitate observation of the internal conditions.

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