A waterless and silent chest closed drainage device

Abstract

The present invention relates to the field of medical device technology, and specifically to a waterless silent chest closed drainage device, including a drainage bottle, a drainage tube and a negative pressure mechanism, one end of the drainage tube is inserted into the drainage bottle, and the other end of the drainage tube is inserted into the chest cavity of the patient, the negative pressure mechanism includes a non-return unit that only allows gas to flow out of the drainage bottle and a constant negative pressure unit for generating negative pressure on the non-return unit, one end of the non-return unit is connected to the inner cavity of the drainage bottle, and the other end of the non-return unit is connected to the constant negative pressure unit arranged outside the drainage bottle through a negative pressure tube. In the drainage bottle of this solution, water is not used to seal the drainage tube, so there is no need to frequently replace the water in the drainage bottle, which greatly reduces the nursing workload.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a waterless and silent closed chest drainage device. Background Art

[0002] Closed chest drainage is a conventional treatment for pneumothorax. Closed chest drainage is to place one end of the drainage tube into the chest cavity and connect the other end to a water seal bottle that is lower than the tube in order to discharge gas or collect fluid in the chest cavity, so that the lung tissue can reopen and restore function. As a treatment method, it is widely used in the drainage of hemothorax, pneumothorax, empyema and after thoracotomy, and plays a very important role in the treatment of the disease.

[0003] In the prior art, when closed chest drainage using a water seal bottle is performed, one end of the drainage tube needs to be inserted into the water seal bottle 2-3 cm below the liquid surface, and then a negative pressure pipe is inserted into the water seal bottle. The negative pressure pipe is connected to the negative pressure device, and the drainage fluid is collected through the water seal bottle to control the exhaust speed of the pleural effusion and prevent the pleural gas from directly connecting to the atmosphere. However, when the pleural effusion gas flows through the water in the water seal bottle, noise is generated, and when the negative pressure device continues to operate to maintain negative pressure, continuous noise is also generated, affecting the patient's rest. When the water seal bottle accidentally tilts, the patient will feel uncomfortable. When tilting, tipping or shaking, the drainage tube in the water seal bottle will be exposed out of the water, connecting the chest cavity with the outside air to form an open pneumothorax, allowing outside gas to enter the chest cavity, endangering the patient's life. In addition, the addition of pleural effusion or the volatilization of water in the water seal bottle will cause the water level to change, thereby causing the water seal pressure to change, which is not conducive to the stable discharge of pleural effusion. Nursing staff are required to frequently replace the closed water in the water seal bottle under sterile conditions, which greatly increases the nursing workload. For this reason, we propose a waterless and silent closed chest drainage device. Summary of the invention

[0004] The purpose of the present invention is to provide a waterless and silent closed chest drainage device to solve the problem of frequent replacement of water bodies in the above-mentioned prior art, which leads to a large nursing workload.

[0005] To achieve the above object, the basic scheme of the present invention is as follows:

[0006] A waterless and silent closed chest drainage device comprises a drainage bottle, a drainage tube and a negative pressure mechanism, wherein one end of the drainage tube is inserted into the drainage bottle, and the other end of the drainage tube is inserted into the chest cavity of a patient, and the negative pressure mechanism comprises a non-return unit that only allows gas to flow out of the drainage bottle and a constant negative pressure unit that generates negative pressure for the non-return unit, one end of the non-return unit is connected to the inner cavity of the drainage bottle, and the other end of the non-return unit is connected to the constant negative pressure unit arranged outside the drainage bottle through the negative pressure tube.

[0007] In the above basic scheme, the drainage bottle is placed below the patient's chest cavity, and the drainage tube drains the accumulated fluid and gas in the patient's chest cavity to the drainage bottle. The non-return unit allows the gas in the drainage bottle to be discharged outward through the non-return unit and prevents outside air from entering the drainage bottle. The constant negative pressure unit accelerates the discharge of the gas in the drainage bottle to the outside. Since no water is used in the drainage bottle to seal the drainage tube, there is no need to frequently replace the water in the drainage bottle, which greatly reduces the nursing workload.

[0008] Further, the anti-return unit includes an outer cylinder, a conical block, an annular plate and a spring arranged in the outer cylinder, the outer cylinder is vertically arranged on the top of the drainage bottle and fixedly connected to the drainage bottle, the two ends of the outer cylinder are closed, and a conical hole matching the conical block is arranged on the bottom plate of the outer cylinder, the annular plate is horizontally arranged, the annular plate is fixedly connected to the inner wall of the outer cylinder, the conical block is located in the conical hole and fits the inner wall of the conical hole, the two ends of the spring are respectively connected to the annular plate and the conical block, the first end of the negative pressure tube passes through the top plate of the outer cylinder and extends into the inner cavity of the outer cylinder, the first end of the negative pressure tube is sealed and fixedly connected to the top plate of the outer cylinder, a pipe one is arranged in the conical hole, the upper end of the pipe one is sealed and connected to the conical hole, the lower end of the pipe one passes through the top plate of the drainage bottle and extends into the inner cavity of the drainage bottle, and the lower end of the pipe one is sealed and fixedly connected to the top plate of the drainage bottle.

[0009] Under the elastic force of the spring, the conical block fits with the conical hole to prevent gas from entering the drainage bottle through the conical hole and connecting with the chest cavity to form an open pneumothorax.

[0010] Furthermore, the anti-return unit also includes an inner cylinder arranged in the inner cavity of the cylinder, a connecting rope and a weight block arranged in the inner cylinder. The inner cylinder is vertically arranged, and the inner cylinder is fixedly connected to the annular plate. A pulley group is arranged on the top plate of the inner cylinder. One end of the connecting rope is connected to the upper end of the conical block, and the other end of the connecting rope is connected to the weight block after passing through the pulley group. The weight of the weight block is equal to the weight of the conical block.

[0011] The weight of the weight block 1 is equal to the weight of the conical block. After the reversal of the pulley group, the gravity of the conical block does not participate in closing the conical hole, and the conical hole is closed only by the elastic force of the spring. When the drainage bottle is tilted so that the axis of the drainage bottle is in a horizontal state, the gravity direction of the conical block is perpendicular to the axis of the conical hole, and the gravity of the conical block does not participate in closing the conical hole. At this time, the weight block 1 does not produce a pulling effect on the conical block. At this time, the conical hole is closed only by the elastic force of the spring. Therefore, the above arrangement makes it possible for the conical block to have the same closing force on the conical hole regardless of whether the drainage bottle is in an upright state or a tilted state, and thus the pressure of the accumulated air from the chest cavity to open the conical block for exhaust is the same, and the exhaust is stable.

[0012] Furthermore, the constant negative pressure unit includes a fixed rod arranged along the radial direction of the drainage bottle and a negative pressure tank rotatably connected to the fixed rod, one end of the fixed rod is fixedly connected to the outer wall of the drainage bottle, the other end of the fixed rod is a free end, the outer wall of the free end of the fixed rod is sleeved with a rotating sleeve so that the rotating sleeve can rotate around the axis of the fixed rod, the negative pressure tank is vertically arranged, the negative pressure tank is a circular cylinder with a closed upper end, the upper end of the negative pressure tank is fixedly connected to the rotating sleeve, the internal upper cavity of the negative pressure tank is fixedly connected to an annular electromagnet, a controller is arranged on the drainage bottle, the controller is externally connected to a power supply, the annular electromagnet is electrically connected to the controller, and a A weight block 2 is provided which is sealingly and slidingly connected to the inner wall of the negative pressure tank, a sensor 1 is provided on the inner bottom wall of the negative pressure tank, a sensor 2 is provided on the lower surface of the annular electromagnet, both the sensor 1 and the sensor 2 are electrically connected to the controller, a through hole is provided on the upper side wall of the negative pressure tank, a one-way valve 1 which only allows gas to flow out of the negative pressure tank through the through hole is provided at the through hole, the negative pressure tube is a hose, the second end of the negative pressure tube passes through the upper side wall of the negative pressure tank and extends into the inner cavity of the negative pressure tank, the second end of the negative pressure tube is sealingly and fixedly connected to the upper side wall of the negative pressure tank, and a weight block 3 is fixedly connected to the side wall of the drainage bottle away from the negative pressure tank to balance the forces on both sides of the drainage bottle.

[0013] A constant negative pressure is generated by the gravity of weight block two, which accelerates the discharge rate of gas in the drainage bottle when the conical block is pushed by the accumulated gas in the chest cavity. Due to the constant negative pressure, combined with the elastic force of the spring, the exhaust pressure of the chest cavity is constant and the exhaust is stable. When weight block two moves down to trigger sensor one, the controller controls the annular electromagnet to be energized to generate a magnetic attraction force to move weight block two upward. When the annular electromagnet moves upward to trigger sensor two, the controller controls the annular electromagnet to be de-energized, and weight block two generates a constant negative pressure. Compared with negative pressure equipment that generates negative pressure by continuous power supply, this solution generates negative pressure without noise and is environmentally friendly.

[0014] Furthermore, the radius of the drainage bottle is greater than the distance between the axis of the fixing rod and the bottom surface of the negative pressure tank.

[0015] Since a negative pressure tank is provided and the radius of the drainage bottle is greater than the distance between the axis of the fixed rod and the bottom of the negative pressure tank, when the drainage bottle is tilted, the negative pressure tank can rotate around the fixed rod so that the negative pressure tank remains in a vertical state, so that the gravity direction of the second weight is always coaxial with the inner cylinder, and thus the second weight can always generate a negative pressure of a fixed magnitude, and thus the closing force of the conical block on the conical hole is always the same whether the drainage bottle is in a tilted state or an upright state.

[0016] Furthermore, a conical partition is provided at the lower part of the drainage bottle, a drainage hole is provided in the middle of the conical partition, and a second one-way valve is provided at the drainage hole to only allow the fluid to flow from the upper part of the conical partition to the lower part of the conical partition.

[0017] Furthermore, absorbent cotton is arranged below the conical partition to absorb pleural effusion and prevent the fluid from shaking in the drainage bottle.

[0018] Furthermore, an arc-shaped push plate for squeezing the absorbent cotton is arranged below the conical partition, a push rod is horizontally arranged on the arc-shaped push plate, one end of the push rod is detachably connected to the arc-shaped push plate, the other end of the push rod passes through the side wall of the drainage bottle and extends out of the drainage bottle, the push rod is sealingly and slidingly connected to the drainage bottle, and a drain valve for discharging the liquid in the lower inner cavity of the drainage bottle out of the drainage bottle is arranged on the lower side wall of the drainage bottle.

[0019] Furthermore, a shut-off valve is provided on the drainage tube.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] 1. This solution does not require the continuous operation of negative pressure equipment, does not require the use of liquid-sealed drainage tubes, does not generate noise during drainage, and does not require water replacement, which greatly reduces the workload of medical staff.

[0022] 2. In this scheme, no matter whether the drainage bottle is in an inverted state or an upright state, the pressure generated by the conical block on the conical hole is the same, which can further ensure that a stable sealing pressure is maintained on the pleural effusion regardless of whether the drainage bottle is in an inverted state or an upright state, which is conducive to stabilizing the control of the exhaust rate of the patient's pleural effusion.

[0023] 3. In this scheme, the negative pressure generated by the negative pressure mechanism ensures that external air does not enter the inner cavity of the drainage bottle, thereby ensuring that external air does not enter the chest cavity and accelerating the discharge of gas in the drainage bottle. The negative pressure generated by the negative pressure mechanism is not used to adsorb the chest cavity, and there will be no risk of over-inhalation.

[0024] 4. In this scheme, shaking or tipping of the drainage bottle will not cause external air to enter the chest cavity, and will not cause the risk of open pneumothorax. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0026] In the attached picture:

[0027] Figure 1 It is a structural schematic diagram of the main viewing direction of the present invention.

[0028] Figure 2 Schematic diagram of the structure of the anti-reversal unit.

[0029] Figure 3 It is a top view of the present invention.

[0030] Figure 4 It is a schematic diagram of the lower structure of the drainage bottle from a top view.

[0031] The meanings of the symbols in the accompanying drawings are:

[0032] Drainage bottle 10, drainage tube 101, conical partition 102, discharge hole 103, one-way valve 2 104, absorbent cotton 105, arc-shaped push plate 106, push rod 107, discharge valve 108, shut-off valve 109, check valve 20, outer cylinder 201, conical block 202, annular plate 203, spring 204, conical hole 205, pipeline 1 206, inner cylinder 207, connecting rope 208, weight 1 209, pulley block 210, negative pressure tube 211, constant negative pressure unit 30, fixed rod 301, negative pressure tank 302, rotating sleeve 303, annular electromagnet 304, weight 2 305, sensor 1 306, sensor 2 307, one-way valve 1 308, weight 3 40. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0035] A waterless and silent chest closed drainage device according to this embodiment, such as Figure 1-Figure 4 As shown, it includes a drainage bottle 10, a drainage tube 101 and a negative pressure mechanism, one end of the drainage tube 101 is inserted into the drainage bottle 10, and the other end of the drainage tube 101 is inserted into the chest cavity of the patient, the negative pressure mechanism includes a non-return unit 20 that only allows gas to flow out of the drainage bottle 10 and a constant negative pressure unit 30 for generating negative pressure on the non-return unit 20, one end of the non-return unit 20 is connected to the inner cavity of the drainage bottle 10, and the other end of the non-return unit 20 is connected to the constant negative pressure unit 30 arranged outside the drainage bottle 10 through a negative pressure tube 211.

[0036] like Figure 1The drainage bottle 10 is in the shape of a cylinder with both ends closed and arranged vertically. The top plate of the drainage bottle 10 is sealed and screwed to the upper end of the drainage bottle 10. One end of the drainage tube 101 extends into the drainage bottle 10 and communicates with the inner cavity of the drainage bottle 10. The drainage tube 101 is sealed and fixedly connected to the top plate of the drainage bottle 10. A shut-off valve 109 for controlling the on / off of the drainage tube is provided on the drainage tube 101. A conical partition 102 is provided at the lower part of the drainage bottle 10. The circumference of the conical partition 102 is sealed and fixedly connected to the inner wall of the drainage bottle 10. A drainage hole 103 is provided in the middle part of the conical partition 102 to connect the upper and lower spaces of the conical partition 102. A one-way valve 104 is provided in the drainage hole 103 to allow only fluid to flow from the upper space of the conical partition 102 to the lower space of the conical partition 102. Figure 4 As shown, absorbent cotton 105 for absorbing liquid and an arc-shaped push plate 106 for squeezing the absorbent cotton 105 are arranged below the conical partition 102, and a push rod 107 is arranged horizontally along the radial direction of the drainage bottle 10 on the arc-shaped push plate 106, and the first end of the push rod 107 is detachably connected to the arc-shaped push plate 106. Specifically, an external thread is arranged at the first end of the push rod 107, and an internal thread matching the external thread on the first end of the push rod 107 is arranged on the arc-shaped push plate 106, and the push rod 107 is threadedly connected to the arc-shaped push plate 106, and the second end of the push rod 107 passes through the side wall of the drainage bottle 10 and extends out of the drainage bottle 10, and the push rod 107 is sealingly and slidably connected to the side wall of the drainage bottle 10, and a drain valve 108 for discharging the liquid in the lower inner cavity of the drainage bottle 10 to the outside of the drainage bottle 10 is arranged on the lower side wall of the drainage bottle 10. The accumulated fluid from the patient's chest cavity flows into the lower inner cavity of the drainage bottle 10 through the one-way valve 104 and is absorbed by the absorbent cotton 105 to prevent the liquid from shaking in the drainage bottle 10. When the accumulated fluid in the drainage bottle 10 needs to be discharged, the shut-off valve 109 is closed, the drain valve 108 is opened, and the push rod 107 is pushed to squeeze the absorbent cotton 105 so that the absorbent cotton 105 releases the accumulated fluid and is discharged to the outside of the drainage bottle 10 through the drain valve 108.

[0037] like Figure 2As shown, the anti-return unit 20 includes an outer cylinder 201, an inner cylinder 207 arranged in the outer cylinder 201, a conical block 202, an annular plate 203, a connecting rope 208, a weight block 209 and a spring 204. The outer cylinder 201 is vertically arranged on the top of the drainage bottle 10 and fixedly connected to the drainage bottle 10. Both ends of the outer cylinder 201 are closed. A conical hole 205 matching the conical block 202 is arranged on the bottom plate of the outer cylinder 201. The annular plate 203 is horizontally arranged. The annular plate 203 is fixedly connected to the inner wall of the outer cylinder 201. The conical block 202 is located in the conical hole 205 and fits the inner wall of the conical hole 205. The spring 204 is vertically arranged. The upper end of the spring 204 is connected to the annular plate 203, and the lower end of the spring 204 is connected to the conical block 202. The negative pressure pipe 211 is a hose. The first end of the negative pressure tube 211 passes through the top plate of the outer cylinder 201 and extends into the inner cavity of the outer cylinder 201. The first end of the negative pressure tube 211 is sealed and fixedly connected to the top plate of the outer cylinder 201. A pipe 206 is arranged in the tapered hole 205. The upper end of the pipe 206 is sealed and connected to the tapered hole 205. The lower end of the pipe 206 passes through the top plate of the drainage bottle 10 and extends into the inner cavity of the drainage bottle 10. The lower end of the pipe 206 is sealed and fixedly connected to the top plate of the drainage bottle 10. The inner cylinder 207 is vertically arranged. The inner cylinder 207 is fixedly connected to the annular plate 203. A pulley block 210 is arranged on the top plate of the inner cylinder 207. One end of the connecting rope 208 is connected to the upper end of the tapered block 202. The other end of the connecting rope 208 is connected to the weight block 209 after passing through the pulley block 210. The weight of the weight block 209 is equal to the weight of the tapered block 202. The weight of the weight block 209 is equal to the weight of the conical block 202. After the pulley group 210 is reversed, the gravity of the conical block 202 does not participate in closing the conical hole 205, and the conical hole 205 is closed only by the elastic force of the spring 204. When the drainage bottle 10 is tilted so that the axis of the drainage bottle 10 is in a horizontal state, the gravity direction of the conical block 202 is perpendicular to the axis of the conical hole 205, and the gravity of the conical block 202 does not participate in closing the conical hole 205. At this time, the weight block 209 does not produce a pulling effect on the conical block 202. At this time, the conical hole 205 is closed only by the elastic force of the spring 204. Therefore, the above arrangement makes it possible for the conical block 202 to have the same closing force on the conical hole 205 regardless of whether the drainage bottle 10 is in an upright state or a tilted state, and thus the pressure of the accumulated air from the chest cavity to open the conical block 202 for exhaust is the same, and the exhaust is stable.

[0038] The constant negative pressure unit 30 includes a fixed rod 301 arranged along the radial direction of the drainage bottle 10 and a negative pressure tank 302 rotatably connected to the fixed rod 301. One end of the fixed rod 301 is fixedly connected to the outer wall of the drainage bottle 10, and the other end of the fixed rod 301 is a free end. The outer wall of the free end of the fixed rod 301 is sleeved with a rotating sleeve 303 so that the rotating sleeve 303 can rotate around the axis of the fixed rod 301. The negative pressure tank 302 is vertically arranged, and the negative pressure tank 302 is closed at the upper end. The circular cylinder, the upper end of the negative pressure tank 302 is fixedly connected to the rotating sleeve 303, the radius of the drainage bottle 10 is greater than the distance between the axis of the fixed rod 301 and the bottom surface of the negative pressure tank 302, the inner upper cavity of the negative pressure tank 302 is fixedly connected to the annular electromagnet 304 coaxially arranged with the negative pressure tank 302, a controller is arranged on the drainage bottle 10, the controller is externally connected to the power supply, the annular electromagnet 304 is electrically connected to the controller, a weight block 2 305 sealingly and slidingly connected to the inner wall of the negative pressure tank 302 is arranged below the annular electromagnet 304, the weight block 2 305 is an iron part, a sensor 1 306 is arranged on the inner bottom wall of the negative pressure tank 302, a sensor 2 307 is arranged on the lower surface of the annular electromagnet 304, the sensor 1 306 and the sensor 2 307 are both electrically connected to the controller, the upper side wall of the negative pressure tank 302 is provided with a through hole connecting the inner and outer spaces of the negative pressure tank 302, and the through hole is provided with a through hole that only allows gas to pass through The hole flows out of the one-way valve 308 of the negative pressure tank 302, the second end of the negative pressure tube 211 passes through the upper side wall of the negative pressure tank 302 and extends into the inner cavity of the negative pressure tank 302 and is located in the space above the annular electromagnet 304, the second end of the negative pressure tube 211 is sealed and fixedly connected to the upper side wall of the negative pressure tank 302, and the drainage bottle 10 is fixedly connected to the side wall away from the negative pressure tank 302 with a weight block 3 40. The configuration of the weight block 3 40 balances the gravity on both sides of the drainage bottle along the axial direction of the fixed rod 301.

[0039] A constant negative pressure is generated by the gravity of the second weight 305, which accelerates the discharge rate of the gas in the drainage bottle 10 when the conical block 202 is pushed by the chest gas accumulation. Since the negative pressure is constant, combined with the elastic force of the spring 204, the exhaust pressure of the chest cavity is constant and the exhaust is stable; when the second weight 305 moves down to trigger the first sensor 306, the controller controls the annular electromagnet 304 to be energized to generate a magnetic attraction force to move the second weight 305 upward. When the annular electromagnet 304 moves up to trigger the second sensor 307, the controller controls the annular electromagnet 304 to be de-energized, and the second weight 305 generates a constant negative pressure. Compared with the negative pressure equipment that generates negative pressure by continuous power supply, the negative pressure process generated by this solution is noiseless and environmentally friendly.

[0040] Since the negative pressure tank 302 is provided and the radius of the drainage bottle 10 is greater than the distance between the axis of the fixed rod 301 and the bottom surface of the negative pressure tank 302, when the drainage bottle 10 is tilted, since the weight block 303 and the negative pressure tank 302 are respectively provided on the opposite sides of the drainage bottle 10, and the gravity of the two sides is balanced, the drainage bottle 10 can only tilt in the horizontal diameter direction of the fixed rod 301 when tilted by external force, so that the negative pressure tank 302 can rotate around the fixed rod 301 so that the negative pressure tank 302 is still in a vertical state, so that the gravity direction of the weight block 205 is always coaxial with the inner cylinder 207, and thus the weight block 205 can always generate a fixed size of negative pressure, and thus the closing force of the conical block 202 on the conical hole 205 is always the same when the drainage bottle 10 is in a tilted state or an upright state.

[0041] In this embodiment, the angle of the conical surface can be set so that the conical surface and the surface of the conical block 202 have a self-locking function, which can prevent the conical surface and the conical block 202 from generating a component force of the compression spring 204 under the action of the conical surface and the self-weight of the conical block 202 when the drainage bottle 10 is tilted so that the axis of the conical block 202 is horizontal. This component force will cause the exhaust pressure in the drainage bottle 10 in the tilted state to be different from the exhaust pressure in the drainage bottle 10 in the upright state, which is not conducive to the stable exhaust of the patient.

[0042] The above are only embodiments of the present invention, and the common knowledge such as the known specific structures and characteristics in the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A waterless and silent chest closed drainage device, comprising a drainage bottle, a drainage tube and a negative pressure mechanism, wherein one end of the drainage tube is inserted into the drainage bottle, and the other end of the drainage tube is inserted into the chest cavity of the patient, characterized in that: The negative pressure mechanism includes a non-return unit that only allows gas to flow out of the drainage bottle and a constant negative pressure unit for generating negative pressure on the non-return unit, one end of the non-return unit is connected to the inner cavity of the drainage bottle, and the other end of the non-return unit is connected to the constant negative pressure unit arranged outside the drainage bottle through a negative pressure tube; The anti-return unit comprises an outer cylinder, a conical block, an annular plate and a spring arranged in the outer cylinder, the outer cylinder is vertically arranged on the top of the drainage bottle and fixedly connected to the drainage bottle, the two ends of the outer cylinder are closed, a conical hole matching the conical block is arranged on the bottom plate of the outer cylinder, the annular plate is horizontally arranged, the annular plate is fixedly connected to the inner wall of the outer cylinder, the conical block is located in the conical hole and fits the inner wall of the conical hole, the two ends of the spring are respectively connected to the annular plate and the conical block, the first end of the negative pressure tube passes through the top plate of the outer cylinder and extends into the inner cavity of the outer cylinder, the first end of the negative pressure tube is sealed and fixedly connected to the top plate of the outer cylinder, a pipe one is arranged in the conical hole, the upper end of the pipe one is sealed and connected to the conical hole, the lower end of the pipe one passes through the top plate of the drainage bottle and extends into the inner cavity of the drainage bottle, and the lower end of the pipe one is sealed and fixedly connected to the top plate of the drainage bottle; The anti-return unit also includes an inner cylinder arranged in the outer cylinder, a connecting rope and a weight block 1 arranged in the inner cylinder. The inner cylinder is vertically arranged and fixedly connected to the annular plate. A pulley group is arranged on the top plate of the inner cylinder. One end of the connecting rope is connected to the conical block, and the other end of the connecting rope is connected to the weight block 1 after passing through the pulley group. The weight of the weight block 1 is equal to the weight of the conical block.

2. The waterless and silent chest closed drainage device according to claim 1, characterized in that: The constant negative pressure unit comprises a fixed rod arranged along the radial direction of the drainage bottle and a negative pressure tank rotatably connected to the fixed rod, one end of the fixed rod is fixedly connected to the outer wall of the drainage bottle, the other end of the fixed rod is a free end, the outer wall of the free end of the fixed rod is sleeved with a rotating sleeve so that the rotating sleeve can rotate around the axis of the fixed rod, the negative pressure tank is vertically arranged, the negative pressure tank is a circular cylinder with a closed upper end, the upper end of the negative pressure tank is fixedly connected to the rotating sleeve, the inner upper cavity of the negative pressure tank is fixedly connected to an annular electromagnet, a controller is arranged on the drainage bottle, the controller is externally connected to a power supply, the annular electromagnet is electrically connected to the controller, and a A weight block 2 is sealingly and slidingly connected to the inner wall of the negative pressure tank, a sensor 1 is arranged on the inner bottom wall of the negative pressure tank, a sensor 2 is arranged on the lower surface of the annular electromagnet, both the sensor 1 and the sensor 2 are electrically connected to the controller, a through hole is arranged on the upper side wall of the negative pressure tank, a one-way valve 1 is arranged at the through hole to only allow gas to flow out of the negative pressure tank through the through hole, the negative pressure pipe is a hose, the second end of the negative pressure pipe passes through the upper side wall of the negative pressure tank and extends into the inner cavity of the negative pressure tank, the second end of the negative pressure pipe is sealingly and fixedly connected to the upper side wall of the negative pressure tank, and a weight block 3 is fixedly connected to the side wall of the drainage bottle away from the negative pressure tank to balance the gravity on both sides of the drainage bottle.

3. The waterless and silent chest closed drainage device according to claim 2, characterized in that: The radius of the drainage bottle is greater than the distance between the axis of the fixing rod and the bottom surface of the negative pressure tank.

4. The waterless and silent chest closed drainage device according to claim 3 is characterized by: A conical partition is arranged at the lower part of the drainage bottle, a discharge hole is arranged in the middle part of the conical partition, and a one-way valve 2 is arranged at the discharge hole to only allow the fluid to flow from the upper part of the conical partition to the lower part of the conical partition.

5. The waterless and silent chest closed drainage device according to claim 4, characterized in that: Absorbent cotton is arranged below the conical partition.

6. The waterless and silent chest closed drainage device according to claim 5, characterized in that: An arc-shaped push plate for squeezing the absorbent cotton is arranged below the conical partition, a push rod is horizontally arranged on the arc-shaped push plate, one end of the push rod is detachably connected to the arc-shaped push plate, the other end of the push rod passes through the side wall of the drainage bottle and extends out of the drainage bottle, the push rod is sealingly and slidingly connected to the drainage bottle, and a drain valve for discharging liquid from the lower inner cavity of the drainage bottle out of the drainage bottle is arranged on the lower side wall of the drainage bottle.

7. The waterless and silent chest closed drainage device according to claim 6, characterized in that: A shut-off valve is arranged on the drainage pipe.

Images