A constant pressure negative pressure maintenance device for chest drainage

Abstract

This utility model relates to the field of medical auxiliary devices and discloses a constant pressure / negative pressure maintenance device for chest drainage. It includes a valve body cylinder, a positioning seat fixedly connected to the front center of the valve body cylinder, an installation tube fixedly connected to the front inner side of the positioning seat, a knob cover rotatably connected to the outside of the installation tube, a valve chamber column fixedly connected to the inner wall of the knob cover, a reinforcing ring fixedly connected to the outside of the valve chamber column, a sealing piston slidably connected inside the positioning seat, a lubrication assembly for stabilizing the sliding of the sealing piston provided on the outside of the sealing piston, a threaded rod fixedly connected to the front side of the sealing piston, a spring sleeved on the outside of the threaded rod, and a piston rod fixedly connected to the rear side of the sealing piston. In this utility model, the constant pressure is maintained by compressing air using the thread of the reinforcing ring and the elasticity of the threaded rod, and a rolling buffer layer is formed by ball bearings on the outside of the sealing piston to adapt to piston movement and prevent jamming.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary devices, and in particular to a constant negative pressure maintenance device for thoracic drainage. Background Technology

[0002] In the medical field, closed chest drainage is commonly used to treat patients with conditions such as chest trauma, pneumothorax, and pleural effusion. Negative pressure aspirators, as common medical devices, are used to remove sputum, pus, blood, and fluid from the body.

[0003] Traditional negative pressure aspirators typically consist of a chest drainage bottle and connecting tubing. Negative pressure is generated by adjusting the height of the bottle to promote the drainage of pleural effusion or gas. However, this traditional device has some shortcomings. For example, when the chest drainage bottle is connected to a negative pressure source and the required negative pressure is adjusted using a negative pressure gauge, insufficient piston pressure allows outside air to enter the system. This causes the system pressure to gradually increase and the negative pressure value to decrease as air continues to enter, making it difficult to maintain a stable negative pressure state. This instability in negative pressure significantly reduces the drainage effect of pleural effusion or gas. Therefore, to address these issues, a constant negative pressure maintenance device for chest drainage is proposed. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a constant negative pressure maintenance device for thoracic drainage, which aims to improve the problem that existing devices cannot maintain a stable negative pressure after the negative pressure is adjusted.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A constant pressure negative pressure maintenance device for thoracic drainage includes a valve body cylinder. A positioning seat is fixedly connected to the middle of the front side of the valve body cylinder. An installation tube is fixedly connected to the front side of the inner part of the positioning seat. A knob cover is rotatably connected to the outside of the installation tube. A valve chamber column is fixedly connected to the inner wall of the middle part of the knob cover. A reinforcing ring is fixedly connected to the outside of the valve chamber column. A sealing piston is slidably connected inside the positioning seat. A lubrication component is provided on the outside of the sealing piston to assist in the stable sliding of the sealing piston. A threaded rod is fixedly connected to the front side of the sealing piston. A spring is sleeved on the outside of the threaded rod. A piston rod is fixedly connected to the rear side of the sealing piston.

[0007] As a further description of the above technical solution:

[0008] The lubrication assembly includes a groove formed on the outside of the sealing piston, a plurality of balls slidably connected inside the groove, and the balls being movably connected to the inner wall of the positioning seat.

[0009] As a further description of the above technical solution:

[0010] An external vacuum tube is detachably connected to the rear side of the valve body cylinder, a vacuum tube connector is fixedly connected to the front side of the external vacuum tube, and a vacuum gauge is fixedly connected to the top of the valve body cylinder.

[0011] As a further description of the above technical solution:

[0012] The front end of the spring is fixedly connected to the rear side of the valve chamber column, and the rear side of the spring is fixedly connected to the front side of the sealing piston.

[0013] As a further description of the above technical solution:

[0014] The piston rod is slidably connected to the rear middle part of the positioning seat, and the outer rear side of the piston rod engages with the outer front side of the vacuum tube connector.

[0015] As a further description of the above technical solution:

[0016] The threaded rod is threadedly connected to the inner wall of the valve cavity column, and a filter is fixedly connected to the outside of the valve body cylinder;

[0017] As a further description of the above technical solution:

[0018] The outer part of the reinforcing ring engages with the middle part of the inner wall of the knob cover;

[0019] As a further description of the above technical solution:

[0020] A connecting nut is fixedly connected to the bottom end of the valve body cylinder, and an external flexible hose is detachably connected to the bottom end of the connecting nut.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the valve chamber column protected by the knob cover rotates, causing the threaded rod to extend and retract in the middle groove of the valve chamber column. This allows the sealing piston to slide in the positioning seat and simultaneously adjust the vacuum tube connector to open. This achieves the use of the elasticity of the reinforcing ring thread and the threaded rod to compress the air pressure to maintain a constant pressure in the device, preventing instability after adjusting the air pressure and ensuring the drainage effect.

[0023] 2. In this utility model, the contact between the ball bearings surrounding the outside of the sealing piston and the inner wall of the positioning seat is a rolling friction. Compared with traditional sliding friction, its friction force is much smaller. During the reciprocating motion of the piston, the ball bearings can form a rolling buffer layer on the outside of the sealing piston, adapting to the piston's motion state, avoiding jamming, and ensuring the continuous and stable operation of the constant pressure device. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of a constant negative pressure maintenance device for thoracic drainage proposed in this utility model;

[0025] Figure 2 This is a cross-sectional view of the valve body of a constant pressure negative pressure maintenance device for thoracic drainage proposed in this utility model.

[0026] Figure 3 This is an exploded view of the valve chamber column of a constant pressure negative pressure maintenance device for thoracic drainage proposed in this utility model;

[0027] Figure 4 This is an exploded view of the sealing piston of a constant negative pressure maintenance device for thoracic drainage proposed in this utility model.

[0028] Legend:

[0029] 1. Valve body cylinder; 2. Positioning seat; 3. Mounting tube; 4. Knob cover; 5. Valve chamber column; 6. Reinforcing ring; 7. Sealing piston; 8. Ring groove; 9. Ball bearing; 10. Threaded rod; 11. Spring; 12. Piston rod; 13. External vacuum tube; 14. Vacuum tube connector; 15. Vacuum gauge; 16. Filter; 17. Connecting nut; 18. External hose. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figures 1 to 3 This utility model provides an embodiment of a constant negative pressure maintenance device for thoracic drainage, comprising a valve body cylinder 1, which serves as the air pressure carrier. A positioning seat 2 is fixedly connected to the front center of the valve body cylinder 1, and an installation tube 3 is fixedly connected to the front interior of the positioning seat 2. The positioning seat 2 and the installation tube 3 are fixedly connected to form an internal stepped cavity. A knob cover 4 is rotatably connected to the outside of the installation tube 3. Rotating the knob cover 4 drives the valve chamber column 5 to rotate. The valve chamber column 5, which is cylindrical in shape, is fixedly connected to the inner wall of the middle part of the knob cover 4. The outer head of the knob cover 4 engages and is fixed to the inner wall of the knob cover 4, so that the knob cover 4 can be easily rotated by the user while protecting the outside of the valve chamber column 5.

[0032] A reinforcing ring 6 is fixedly connected to the outside of the valve chamber column 5. The outside of the reinforcing ring 6 engages with the middle of the inner wall of the knob cover 4. The reinforcing ring 6 connects the valve chamber column 5 and the knob cover 4, increasing the connection between them. A sealing piston 7 is slidably connected inside the positioning seat 2. The sealing piston 7 prevents gas leakage by sealing with the inner wall of the positioning seat 2, and can compress or release the gas inside the positioning seat 2, thereby regulating the pressure.

[0033] refer to Figure 2 , Figure 3 The sealing piston 7 is externally equipped with a lubrication assembly to assist in the stable sliding of the sealing piston 7. The lubrication assembly includes a groove 8, which is formed on the outside of the sealing piston 7 and is used to accommodate balls 9, providing rolling space for the balls 9. Multiple balls 9 are slidably connected inside the groove 8, and the outside of the balls 9 is movably connected to the inner wall of the positioning seat 2. When the sealing piston 7 slides, the balls 9 roll to form a rolling buffer layer, adapting to the movement of the piston and preventing jamming, thereby ensuring that the constant pressure device can work continuously and stably.

[0034] A vacuum gauge 15 is fixedly connected to the top of the valve body cylinder 1. The vacuum gauge 15 is used to display the negative pressure value inside the device in real time, which facilitates the operator to monitor and adjust the working status of the device and ensure that the device operates within the set negative pressure range. A filter 16 is fixedly connected to the outside of the valve body cylinder 1. The filter 16 is used to filter impurities, particles and other substances carried during the drainage process, preventing these substances from entering the device or affecting subsequent treatment processes, and ensuring the cleanliness and safety of the drainage. A connecting nut 17 is fixedly connected to the bottom of the valve body cylinder 1. An external hose 18 is detachably connected to the bottom of the connecting nut 17. The connecting nut 17 is used to connect the external hose 18, realizing the connection between the device and the external drainage system, facilitating the transmission of drainage liquid or gas, and ensuring the sealing of the connection to prevent leakage.

[0035] refer to Figure 4 A threaded rod 10 is fixedly connected to the front side of the sealing piston 7. The threaded rod 10 is threadedly connected to the inner wall of the valve chamber column 5. The threaded rod 10 drives the valve chamber 5 to rotate through the knob cover 4, causing the threaded rod 10 to rotate in the inner wall of the valve chamber 5, thereby driving the sealing piston 7 to move, realizing the compression and release of gas in the positioning seat 2, and regulating the pressure of the device. A spring 11 is sleeved on the outside of the threaded rod 10. The front end of the spring 11 is fixedly connected to the rear side of the valve chamber column 5, and the rear side of the spring 11 is fixedly connected to the front side of the sealing piston 7. The spring 11 uses its own elastic force to assist the movement of the sealing piston 7. When the pressure changes, the spring 11 can store and release energy to help the device maintain the set pressure value more stably.

[0036] A piston rod 12 is fixedly connected to the rear side of the sealing piston 7. The outer side of the piston rod 12 is slidably connected to the rear side of the middle part of the positioning seat 2. By moving the sealing piston 7, the outer rear side of the piston rod 12 engages with the outer front side of the vacuum tube connector 14, causing the piston rod 12 and the vacuum tube connector 14 to open or close. An external vacuum tube 13 is detachably connected to the rear side of the valve body cylinder 1. A vacuum tube connector 14 is fixedly connected to the front side of the external vacuum tube 13. The vacuum tube connector 14 fixed to the front side of the vacuum tube 13 is used to connect to an external negative pressure source to introduce negative pressure into the device and realize a negative pressure environment for chest cavity drainage.

[0037] Working principle: When adjusting the air pressure of the device, rotating the knob cover 4 causes the valve chamber column 5 inside to rotate outside the mounting tube 3. This action drives the threads on the inner wall of the valve chamber column 5, which in turn causes the threaded rod 10 fixed by the sealing piston 7 to rotate on the inner wall of the valve chamber column 5. At the same time, the movement of the threaded rod 10 causes the piston rod 12 to open or close with the vacuum tube connector 14 through the sealing piston 7, thereby realizing the mutual adjustment of the threads of the threaded rod 10 and the valve chamber column 5. In addition, the elastic force of the spring 11 causes the gas in the positioning seat 2 to be driven by the sliding of the sealing piston 7 and compressed, thereby increasing the pressure. When the pressure exceeds the set value, the gas expands and pushes the sealing piston 7 to move in the opposite direction, thereby reducing the pressure and achieving the purpose of constant pressure.

[0038] In addition, ball bearings 9 are provided on the outside of the sealing piston 7. The ball bearings 9 can form a rolling buffer layer on the outside of the sealing piston 7, adapting to the movement of the piston, avoiding jamming, and thus ensuring that the constant pressure device can work continuously and stably.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A constant pressure negative pressure maintaining device for chest drainage, comprising a valve body cylinder (1), characterized in that: A positioning seat (2) is fixedly connected to the front middle of the valve body cylinder (1). An installation tube (3) is fixedly connected to the front inside of the positioning seat (2). A knob cover (4) is rotatably connected to the outside of the installation tube (3). A valve chamber column (5) is fixedly connected to the inner wall of the middle part of the knob cover (4). A reinforcing ring (6) is fixedly connected to the outside of the valve chamber column (5). A sealing piston (7) is slidably connected inside the positioning seat (2). A lubrication component is provided on the outside of the sealing piston (7) to assist the sealing piston (7) in stable sliding. A threaded rod (10) is fixedly connected to the front of the sealing piston (7). A spring (11) is sleeved on the outside of the threaded rod (10). A piston rod (12) is fixedly connected to the rear of the sealing piston (7).

2. The constant pressure negative pressure maintaining device for chest drainage according to claim 1, characterized in that: The lubrication assembly includes a groove (8) which is formed outside the sealing piston (7). Multiple balls (9) are slidably connected inside the groove (8), and the balls (9) are movably connected to the inner wall of the positioning seat (2).

3. The constant pressure negative pressure maintaining device for chest drainage according to claim 1, characterized in that: An external vacuum tube (13) is detachably connected to the rear side of the valve body cylinder (1), a vacuum tube connector (14) is fixedly connected to the front side of the external vacuum tube (13), and a vacuum gauge (15) is fixedly connected to the top of the valve body cylinder (1).

4. The constant negative pressure maintenance device for thoracic drainage according to claim 1, characterized in that: The front end of the spring (11) is fixedly connected to the rear side of the valve chamber column (5), and the rear side of the spring (11) is fixedly connected to the front side of the sealing piston (7).

5. The constant pressure negative pressure maintaining device for chest drainage according to claim 3, characterized in that: The piston rod (12) is slidably connected to the rear side of the middle part of the positioning seat (2), and the rear outer side of the piston rod (12) engages with the front outer side of the vacuum tube connector (14).

6. The constant pressure negative pressure maintaining device for chest drainage according to claim 1, characterized in that: The threaded rod (10) is threadedly connected to the inner wall of the valve chamber column (5), and a filter (16) is fixedly connected to the outside of the valve body cylinder (1).

7. The constant pressure negative pressure maintaining device for chest drainage according to claim 1, characterized in that: The outer part of the reinforcing ring (6) engages with the middle part of the inner wall of the knob cover (4).

8. A constant negative pressure maintenance device for thoracic drainage according to claim 1, characterized in that: The bottom end of the valve body cylinder (1) is fixedly connected to a connecting nut (17), and the bottom end of the connecting nut (17) is detachably connected to an external hose (18).

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