Drainage device capable of continuously and stably adjusting negative pressure

Abstract

The utility model discloses a drainage device capable of continuously and stably adjusting negative pressure, which comprises a bottle body, a bottle cap is detachably and fixedly mounted on the bottle body, a downward recess is arranged in the middle of the bottle cap, the recess is in a counterbore shape, a pressure adjusting assembly is mounted in the recess, and a pressure measuring assembly is fixedly mounted on one side of the pressure adjusting assembly and positioned on the bottle cap; the negative pressure adjusting device has the advantages that the negative pressure value can be continuously adjusted, the negative pressure can be freely adjusted according to needs through the pressure adjusting assembly, and the negative pressure adjusting mode is simple and efficient; the negative pressure level is accurately controlled through simple pre-tightening force adjustment of the tension spring, and tissue damage caused by too high suction force is prevented; the whole system does not depend on an external power supply and a complex circuit, has extremely high reliability and portability, is particularly suitable for postoperative drainage, wound nursing and application scenes with limited resources, and greatly improves the use safety and convenience while ensuring the drainage effect.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a drainage device for continuously and stably adjusting negative pressure. Background Technology

[0002] Postoperative fluid accumulation is a common problem affecting wound healing. The pathological environment it creates can significantly increase the risk of infection and delay the recovery process. Negative pressure drainage technology is an effective solution to this challenge. By creating a closed negative pressure environment, it continuously drains the fluid and necrotic tissue, thereby eliminating the breeding ground for infection. This not only strengthens local microcirculation but also creates favorable conditions for granulation tissue growth, forming a virtuous cycle that promotes healing. It is precisely because this technology can provide stable, controllable, and backflow-proof drainage that it has become one of the key technologies for postoperative management.

[0003] Current negative pressure drainage devices have the following problems in use: First, the negative pressure level setting is uniform, making it difficult to adapt to the differentiated negative pressure requirements after different types of surgery. A fixed negative pressure value may cause tissue damage in some patients or affect the effective removal of fluid accumulation. In addition, as the fluid in the drainage bottle gradually increases, the actual negative pressure value inside the device will decrease, thus affecting the stability of the drainage effect. Second, although there are some adjustable negative pressure drainage devices on the market, their adjustment process is still not convenient enough. For example, the design of the negative pressure reading position is not reasonable, and medical staff often need to adjust the device... The inconvenience of raising or flipping the device to view values ​​not only increases safety risks and the possibility of leakage during use, but also makes adjusting negative pressure often require multiple rotations, which is cumbersome and inefficient. Furthermore, adjusting the scale of negative pressure requires multiple cyclic rotations, which is not efficient enough. Thirdly, the various shapes of negative pressure devices and drainage tubes make it inconvenient for medical staff to mark patient treatment information, affecting the comfort of operation. In addition, replacing a new negative pressure device after completing a drainage is also complicated, increasing the burden of clinical work. Utility Model Content

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a drainage device for continuously and stably adjusting negative pressure, including a bottle body, a bottle cap detachably fixedly installed on the bottle body, a downward recess in the middle of the bottle cap, the recess being countersunk in shape, a cavity on the upper side being a first cavity, and a cavity on the lower side of the first cavity being a second cavity, a pressure regulating assembly installed in the recess, and a pressure measuring assembly installed on one side of the pressure regulating assembly and on the bottle cap; the pressure regulating assembly includes a threaded sleeve fixedly installed in the first cavity of the bottle cap, a rotating block installed inside the threaded sleeve, the rotating block being threadedly connected to the threaded sleeve, a knob installed on the upper side of the rotating block, and the knob being rotatably connected to the threaded sleeve; the outer side of the rotating block is fixedly connected to... The knob has multiple guide protrusions, and the side wall of the knob has guide grooves with the same number of guide protrusions. The guide protrusions are slidably connected in the guide grooves. A connecting component is provided on the lower side of the rotating block, and a tension spring is provided between the rotating block and the connecting component. The two are connected by the tension spring. The connecting component is slidably installed in the second cavity. When the knob is rotated, the guide groove will drive the rotating block to rotate through the guide protrusions. The cooperation between the rotating block and the threaded sleeve allows it to move up and down while rotating, so that the up and down position of the connecting component can be controlled by turning the knob. The bottom of the second cavity of the bottle cap is conical, and a drainage hole is provided in the middle of the cone. The drainage hole connects the cavity below the first piston to the inside of the bottle body.

[0005] As a preferred technical solution of this utility model, the inner side of the threaded sleeve is provided with a threaded groove, and the inner side of the threaded sleeve and the upper side of the threaded groove are provided with an annular groove. The rotating block is threadedly connected to the threaded sleeve through the threaded groove, and the knob is rotatably connected to the threaded sleeve through the annular groove. The end of the guide protrusion away from the rotating block is provided with an external thread that matches the threaded groove.

[0006] As a preferred technical solution of this utility model, the guide groove is divided into three parts: a first guide groove, a second guide groove, and a third guide groove. The third guide groove is opened along the axial direction of the knob, the first guide groove is opened on the upper left side of the third guide groove, and the second guide groove is opened on the lower right side of the third guide groove. The first guide groove and the second guide groove are both perpendicular to the third guide groove and connected to the third guide groove.

[0007] As a preferred technical solution of this utility model, the upper end of the rotating block is rotatably connected to an upper cover plate, and the lower end of the upper cover plate is detachably fixedly installed with a tension spring. The lower end of the tension spring is detachably fixedly installed with a connecting assembly. The connecting assembly includes a connecting block fixedly connected to the lower end of the tension spring. The lower end of the connecting block is fitted with a first piston for sealing. The lower end of the connecting block is provided with an anti-rollover guide rod. The anti-rollover guide rod passes through the first piston and is fixedly connected to the connecting block. The anti-rollover guide rod is directly opposite the drainage hole, and it does not cause blockage of the drainage hole when inserted into the drainage hole.

[0008] As a preferred technical solution of this utility model, a positioning sleeve is fixedly installed on the lower side of the bottle cap and on the horizontal side of the first cavity. The bottom of the positioning sleeve has a hole communicating with the inside of the bottle body, and a pressure measuring assembly is provided inside the positioning sleeve.

[0009] As a preferred embodiment of this utility model, the pressure measuring assembly includes a scale rod, a second piston, and a pressure spring; the scale rod is slidably connected inside the positioning sleeve, the lower end of the scale rod is fixedly connected to the second piston, the pressure spring is placed in the positioning sleeve, the upper end of the pressure spring is in contact with the second piston, and the lower end of the pressure spring is in contact with the bottom of the positioning sleeve.

[0010] As a preferred technical solution of this utility model, a suction tube is fixedly connected to the bottle cap. One end of the suction tube is connected to the bottom of the second cavity of the bottle cap. When the first piston blocks the drainage hole, there is still a cavity between the first piston and the bottom of the second cavity. This cavity is connected to the suction tube. The other end of the suction tube is located on the upper side of the bottle cap. A threaded conduit interface is fixedly installed on the upper side of the suction tube.

[0011] As a preferred embodiment of this utility model, the upper end of the bottle cap is provided with a scale, and the upper surface of the knob is marked with an indicator mark corresponding to the scale.

[0012] As a preferred technical solution of this utility model, the main body of the bottle is a quadrangular prism, and the front and back of the bottle are marked with solution volume scales.

[0013] As a preferred embodiment of this utility model, a hanging ring is fixedly installed on the upper end of the bottle cap.

[0014] The beneficial effects of this utility model are as follows:

[0015] I. This utility model features the characteristic of continuously adjustable negative pressure value. By turning the knob, the negative pressure value can be freely adjusted as needed, thereby controlling the suction power. The negative pressure value can be determined by the indicator mark on the knob and the scale on the bottle cap. Adjusting the negative pressure value is simple and efficient.

[0016] Second, this utility model precisely controls the negative pressure level through simple tension spring pre-tightening force adjustment, preventing tissue damage caused by excessive suction. The entire system does not rely on external power supply and complex circuits, and has extremely high reliability and portability. It is particularly suitable for postoperative drainage, wound care and resource-limited application scenarios. While ensuring the drainage effect, it greatly improves the safety and convenience of use.

[0017] Third, the suction tube of this utility model is provided with a threaded interface at the outer end, which facilitates the installation of various types of drainage tubes and the quick replacement of new negative pressure devices, thus enhancing its universality and ease of operation.

[0018] Fourth, the square bottle design of this utility model makes it convenient for doctors to record patient information, and the solution volume scale is marked, making it convenient and accurate for doctors to read the volume. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0021] Figure 2 This is a top view of the present invention.

[0022] Figure 3 This utility model Figure 2 A schematic diagram of the cross-sectional structure of AA.

[0023] Figure 4 This is one of the three-dimensional structural diagrams of the bottle cap for diversion of this utility model.

[0024] Figure 5 This is the second three-dimensional structural diagram of the bottle cap of this utility model.

[0025] Figure 6 This is the third three-dimensional structural diagram of the bottle cap of this utility model.

[0026] Figure 7 This utility model Figure 2 A partial cross-sectional view of the pressure measurement assembly of the BB.

[0027] Figure 8 This is a three-dimensional structural diagram of the voltage regulating assembly of this utility model.

[0028] Figure 9 This is a three-dimensional structural diagram of the knob of this utility model.

[0029] Figure 10 This is a three-dimensional structural diagram of the threaded sleeve of this utility model.

[0030] Figure 11 This is a three-dimensional structural diagram of the rotating block of this utility model.

[0031] In the diagram: 1. Bottle body; 2. Bottle cap; 21. Scale; 22. Drain hole; 23. Hanging ring; 24. Suction tube; 25. Positioning sleeve; 3. Pressure regulating assembly; 31. Knob; 311. Indicator mark; 312. First guide groove; 313. Second guide groove; 314. Third guide groove; 32. Top cover plate; 33. Threaded sleeve; 331. Threaded groove; 332. Annular groove; 34. Rotating block; 341. Guide protrusion; 342. External thread; 35. Tension spring; 36. Connecting block; 37. First piston; 38. Anti-tipping guide rod; 4. Pressure measuring assembly; 41. Scale rod; 42. Second piston; 43. Pressure spring. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below.

[0033] See Figures 1-6 A drainage device for continuously and stably adjusting negative pressure includes a bottle body 1, a bottle cap 2 detachably fixedly installed on the bottle body 1, a downward recess in the middle of the bottle cap 2, the recess being countersunk in shape, the upper cavity being a first cavity, and the lower cavity being a second cavity, a pressure regulating assembly 3 installed in the recess, and a pressure measuring assembly 4 fixedly installed on one side of the pressure regulating assembly 3 and on the bottle cap 2; the pressure regulating assembly 3 includes a threaded sleeve 33 fixedly installed in the first cavity of the bottle cap 2, a rotating block 34 disposed inside the threaded sleeve 33, and the rotating block 34 and... The threaded sleeve 33 is threadedly connected, and a knob 31 is provided on the upper side of the rotating block 34. The knob 31 is rotatably connected to the threaded sleeve 33. The inner side of the threaded sleeve 33 has a threaded groove 331, and the inner side of the threaded sleeve 33 and above the threaded groove 331 has an annular groove 332. The rotating block 34 is threadedly connected to the threaded sleeve 33 through the threaded groove 331, and the knob 31 is rotatably connected to the threaded sleeve 33 through the annular groove 332. The end of the guide protrusion 341 away from the rotating block 34 is provided with an external thread 342 that matches the threaded groove 331.

[0034] See Figure 3 , Figures 8-11The rotating block 34 has multiple guide protrusions 341 fixedly connected to its outer side. The knob 31 has guide grooves on its side wall, the same number as the guide protrusions 341, and the guide protrusions 341 are slidably connected within the guide grooves. A connecting assembly is provided on the lower side of the rotating block 34, and a tension spring 35 is provided between the rotating block 34 and the connecting assembly. The two are connected by the tension spring 35. The connecting assembly is slidably installed in the second cavity. When the knob 31 rotates, the guide grooves drive the rotating block 34 to rotate via the guide protrusions 341. The rotating block 34 and the screw... The engagement of the sleeve 33 allows it to move up and down while rotating, enabling the control of the vertical position of the connecting component by turning the knob 31. The knob 31 has guide grooves on its side wall, the same number as the guide protrusions 341. The guide protrusions 341 are slidably connected within the guide grooves. The guide grooves are divided into three parts: a first guide groove 312, a second guide groove 313, and a third guide groove 314. The third guide groove 314 is located along the axial direction of the knob 31. The first guide groove 312 is located on the upper left side of the third guide groove 314. Guide groove 313 is located on the lower right side of third guide groove 314. First guide groove 312 and second guide groove 313 are both perpendicular to and connected to third guide groove 314. A top cover plate 32 is rotatably connected to the upper end of the rotating block 34. A tension spring 35 is detachably fixed to the lower end of the top cover plate 32. A connecting assembly is detachably fixed to the lower end of the tension spring 35. The connecting assembly includes a connecting block 36 fixedly connected to the lower end of the tension spring 35. A first piston 37 for sealing is sleeved on the lower end of the connecting block 36. The lower end of the 36 is provided with an anti-tipping guide rod 38, which passes through the first piston 37 and is fixedly connected to the connecting block 36. The anti-tipping guide rod 38 is directly opposite the drainage hole 22, and it does not block the drainage hole 22 when it is inserted into the drainage hole 22. The bottom of the second cavity of the bottle cap 2 is conical, and a drainage hole 22 is opened in the middle of the cone. The drainage hole 22 connects the cavity below the first piston 37 with the inside of the bottle body 1. The upper end of the bottle cap 2 is provided with a scale 21, and the upper surface of the knob 31 is marked with an indicator mark 311 corresponding to the scale 21.

[0035] See Figure 1 , Figures 4-5 A suction tube 24 is fixedly connected to the bottle cap 2. One end of the suction tube 24 is connected to the bottom of the second cavity of the bottle cap 2. When the first piston 37 blocks the drainage hole 22, there is still a cavity between the first piston 37 and the bottom of the second cavity. This cavity is connected to the suction tube 24. The other end of the suction tube 24 is located on the upper side of the bottle cap 2. A threaded conduit interface is fixedly installed on the upper side of the suction tube 24.

[0036] This invention features continuously adjustable negative pressure. The negative pressure can be freely adjusted as needed by turning the knob 31, and the negative pressure value can be determined by the indicator mark 311 on the knob 31 and the scale 21 on the bottle cap 2. The adjustment of the negative pressure value is simple and efficient. Furthermore, this invention uses a simple tension spring 35 to adjust the pre-tightening force, precisely controlling the negative pressure level and preventing tissue damage due to excessive suction. The entire system does not rely on an external power source or complex circuits, exhibiting extremely high reliability and portability. It is particularly suitable for postoperative drainage, wound care, and resource-limited applications, greatly improving safety and convenience while ensuring drainage effectiveness. In addition, the suction tube 24 of this invention has a threaded interface at its outer end, facilitating the installation of various drainage tube models and the quick replacement of new negative pressure devices, enhancing its versatility and ease of operation.

[0037] Specifically, before this utility model leaves the factory, the knob 31 needs to be turned. As the knob 31 is turned, the guide protrusion 341 will slide relative to the knob 31 along the second guide groove 313. When the guide protrusion 341 slides along the second guide groove 313 to the lower side of the third guide groove 314, the knob 31 will drive the guide protrusion 341 to rotate, thereby driving the entire rotating block 34 to rotate. The external thread 342 on the rotating block 34 cooperates with the threaded groove 331, so that it slides upward along the third guide groove 314 while rotating. The rotating block 34 moves upward, which in turn drives the connecting block 36 and the components connected below it to move upward. When the rotating block 34 moves to the top, it can start to extract some of the air inside the bottle body 1 until the inside of the bottle body 1 reaches a negative pressure of -100KPa. Then, the knob 31 is turned in the opposite direction, and the knob 31 will drive the rotating block 34 to move downward. The movement path is exactly the opposite of the above path until the guide protrusion 341 moves to the right end of the second guide groove 313. At this time, the first piston 37 just blocks the drainage hole 22.

[0038] After aspiration is completed, it can be used. First, connect the external drainage tube to the aspiration tube 24. Make sure the other end of the drainage tube is in correct contact with the part of the patient that needs aspiration. Then, rotate the knob 31 and adjust the negative pressure value of the aspiration according to the indicator mark 311 and the scale 21. As the knob 31 is rotated, stop rotating the knob 31 when the indicator mark 311 points to the required negative pressure value on the scale 21. At this time, the tension spring 35 is in the stretched state, and the first piston 37 blocks the drainage hole 22. At this time, the negative pressure in space A is equal to the negative pressure in the bottle body 1. For ease of description, the space formed by the first piston 37 and the second cavity will be referred to as space A. That is, at this moment, the negative pressure in space A is equal to the negative pressure in the bottle body 1.

[0039] The following describes the operation of each component during suction: Liquid is first drawn into space A, reducing the negative pressure within space A. As the liquid slowly enters space A, the negative pressure gradually becomes insufficient to resist the pulling force of the tension spring 35. The first piston 37 moves upward under the action of the tension spring 35, reopening the drainage hole 22. Liquid from space A is then drawn into the bottle body 1, causing the negative pressure within space A to rise instantaneously. When the negative pressure in space A reaches the set negative pressure value, the first piston 37 moves downward, re-blocking the drainage hole 22. This cycle repeats. A periodic on / off cycle is formed until the negative pressure inside bottle 1 approaches the set negative pressure value, at which point the negative pressure bottle can be replaced. According to Hooke's Law, within the elastic limit, the deformation of an object is proportional to the external force acting on it. Therefore, by adjusting the height of the rotating block 34, the height of the fixed point of the tension spring 35 can be changed, thereby changing the negative pressure value required when the first piston 37 blocks the drainage hole 22. The higher the height of the rotating block 34, the greater the negative pressure value required when the first piston 37 blocks the drainage hole 22, thus achieving control over the suction strength.

[0040] See Figures 4-7 A positioning sleeve 25 is fixedly installed on the lower side of the bottle cap 2 and on the horizontal side of the first cavity. The bottom of the positioning sleeve 25 has a hole communicating with the inside of the bottle body 1. A pressure measuring assembly 4 is provided inside the positioning sleeve 25. The pressure measuring assembly 4 includes a scale rod 41, a second piston 42, and a pressure spring 43. The scale rod 41 is slidably connected inside the positioning sleeve 25. The lower end of the scale rod 41 is fixedly connected to the second piston 42. The pressure spring 43 is placed in the positioning sleeve 25. The upper end of the pressure spring 43 contacts the second piston 42, and the lower end of the pressure spring 43 contacts the bottom of the positioning sleeve 25.

[0041] When adjusting the negative pressure value inside the bottle body 1, the negative pressure value inside the bottle body 1 can be clearly observed through the pressure measuring assembly 4, which is convenient and quick.

[0042] Specifically, when the negative pressure inside the bottle 1 begins to increase, the second piston 42 drives the scale rod 41 to move downward, while compressing the pressure spring 43, and vice versa.

[0043] See Figure 1 , Figures 4-5 The main body of the bottle 1 is a quadrangular prism, and the bottle body 1 is marked with solution volume scales on the front and back; a hanging ring 23 is fixedly installed on the upper end of the bottle cap 2.

[0044] The square bottle body 1 designed in this utility model makes it convenient for doctors to record patient information, and the square bottle body 1 is marked with solution volume scale, making it convenient and accurate for doctors to read the volume.

[0045] The hanging ring 23 can be threaded with a rope or hooked, making the application scenarios of this utility model more extensive.

[0046] It should be noted that before the suction operation, the external drainage tube needs to be connected to the threaded conduit interface of the suction tube 24.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered by the protection scope of the present invention.

Claims

1. A sustained stable regulated negative pressure drainage device, characterized in that, The utility model provides bottle, bottle body is detachably fixed with bottle cap, the middle position of bottle cap has the recess to the down, the recess is the countersunk hole shape, the cavity of upper side is first cavity, the cavity of first cavity downside is second cavity, installs the pressure regulating assembly in the recess, one side of pressure regulating assembly and located on the bottle cap is equipped with pressure measuring assembly; The pressure regulating assembly comprises a threaded sleeve fixedly installed in the first cavity of the bottle cap, a rotating block arranged in the threaded sleeve, the rotating block being threadedly connected with the threaded sleeve, a knob arranged on the upper side of the rotating block, and the knob being rotationally connected with the threaded sleeve. A plurality of guide protrusions are fixedly connected to the outer side of the rotating block, guide grooves are formed in the side wall of the knob and have the same number as the guide protrusions, and the guide protrusions are slidingly connected in the guide grooves. A connecting assembly is arranged on the lower side of the rotating block, a tension spring is arranged between the rotating block and the connecting assembly, the two are connected through the tension spring, the connecting assembly is slidingly installed in the second cavity, when the knob is rotated, the guide groove drives the rotating block to rotate through the guide protrusions, the rotating block is matched with the threaded sleeve to move up and down while rotating, and the function of controlling the up and down position of the connecting assembly by twisting the knob is realized. The bottom of the second cavity of the bottle cap is conical, a drainage hole is formed in the middle of the conical bottom, and the drainage hole communicates the cavity below the first piston with the inside of the bottle body.

2. The sustained stable regulated negative pressure drainage device of claim 1, wherein, A threaded groove is formed in the inner side of the threaded sleeve, an annular clamping groove is formed in the inner side of the threaded sleeve and above the threaded groove, the rotating block is threadedly connected with the threaded sleeve through the threaded groove, the knob is rotationally connected with the threaded sleeve through the annular clamping groove, and external threads are arranged on the end of the guide protrusion away from the rotating block and matched with the threaded groove.

3. The sustained stable regulated negative pressure drainage device of claim 1, wherein, The guide groove is divided into three parts, i.e., a first guide groove, a second guide groove and a third guide groove, the third guide groove is formed along the axial direction of the knob, the first guide groove is formed on the upper left side of the third guide groove, the second guide groove is formed on the lower right side of the third guide groove, and the first guide groove and the second guide groove are perpendicular to and connected with the third guide groove.

4. The sustained stable regulated negative pressure drainage device of claim 1, wherein, An upper cover plate is rotationally connected to the upper end of the rotating block, a tension spring is detachably fixedly installed at the lower end of the upper cover plate, and a connecting assembly is detachably fixedly installed at the lower end of the tension spring.

5. The sustained stable regulated negative pressure drainage device of claim 1, wherein, A positioning sleeve is fixedly installed on the lower side of the bottle cap and the horizontal side of the first cavity, a hole is formed in the bottom of the positioning sleeve and communicates with the inside of the bottle body, and a pressure measuring assembly is arranged in the positioning sleeve.

6. The sustained stable regulated negative pressure drainage device of claim 5, wherein, The pressure measuring assembly comprises a scale rod, a second piston and a pressure spring, the scale rod is slidingly connected in the positioning sleeve, the lower end of the scale rod is fixedly connected with the second piston, the pressure spring is arranged in the positioning sleeve, the upper end of the pressure spring is in contact with the second piston, and the lower end of the pressure spring is in contact with the bottom of the positioning sleeve.

7. The sustained stable regulated negative pressure drainage device of claim 1, wherein, The bottle cap is fixedly connected with a suction pipe, one end of the suction pipe is communicated with the bottom of the second cavity of the bottle cap, when the first piston blocks the drainage hole, there is still a cavity between the first piston and the bottom of the second cavity, the cavity is communicated with the suction pipe, the other end of the suction pipe is located on the upper side of the bottle cap, and a threaded conduit interface is fixedly installed on the end of the suction pipe located on the upper side of the bottle cap.

8. The sustained stable regulated negative pressure drainage device of claim 1, wherein, A scale table is arranged on the upper end of the bottle cap, and an indicating mark corresponding to the scale table is marked on the upper end surface of the knob.

9. The sustained stable regulated negative pressure drainage device of claim 1, wherein, The main body of the bottle body is a quadrangular prism, and the front and back of the bottle body are marked with solution volume scales.

10. The sustained stable regulated negative pressure drainage device of claim 1, wherein, A hanging ring is fixedly installed on the upper end of the bottle cap.

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