Anti-backflow urine bag multi-stage sealing valve group structure

Abstract

The invention relates to the technical field of medical valves, in particular to an anti-backflow urine bag multi-stage sealing valve set structure. The anti-backflow urine bag comprises a sealing piece which is inserted into the top of a urine bag body in a sealed mode, the sealing piece comprises a limiting frame, and an anti-backflow structure is slidably connected into the limiting frame; the limiting frame is of a hollow structure, and the upper portion of the limiting frame is provided with a liquid inlet channel used for liquid inlet. After broken and small stones of a urethra and kidney stone patient flow into the liquid inlet channel along with urine, most of the stones penetrate through the liquid passing hole and flow into the urine bag body, but a small part of the stones still stay at the top of the plugging seat and are located on the outer side of the plugging seat, and after the patient completes urination, the small part of the stones are separated from the liquid passing hole. The scraping plate slides from the edge to the center from the top of the plugging seat, so that stones staying at the top of the plugging seat are scraped to the position near the outer wall of the pressure-bearing seat, the situation that the space between the top of the plugging seat and the side wall of the scraping plate cannot be completely sealed due to the stones is avoided, and the effect of preventing urine backflow is achieved.

Description

Technical Field

[0001] This invention relates to the field of medical valve technology, and more specifically, to a multi-stage sealing valve assembly structure for an anti-reflux urine bag. Background Technology

[0002] In clinical practice, urine in the urine bags of patients with long-term indwelling catheters is prone to carrying bacteria. If urine flows back into the bladder due to gravity, compression, or changes in body position, bacteria can invade the urethra and bladder, causing retrograde urinary tract infections (accounting for more than 40% of hospital-acquired infections). Therefore, existing urine bags are usually equipped with anti-reflux sealing valves to block the backflow path through a physical barrier. That is, when urine flows out, the valve opens to allow urine to flow through; when urine in the urine bag is about to flow back, the valve closes the passage due to the loss of urine pressure, thus preventing urine from flowing back into the urine bag.

[0003] However, for patients with kidney stones, if there are small stones in the urine, and these stones flow through the channel with the urine and remain there, the channel cannot close properly after urination due to the stones inside, thus impairing the valve's backflow function.

[0004] In view of this, we propose a multi-stage sealing valve assembly structure for anti-reflux urine bags to improve the shortcomings of the prior art. Summary of the Invention

[0005] This invention provides a multi-stage sealing valve assembly structure for an anti-reflux urine bag, which solves the problem that when there are small stones in the urine of patients with kidney stones, if the stones flow through the channel with the urine and remain in the channel, the channel cannot be closed tightly after the patient finishes urinating due to the stones inside, thus impairing the backflow function of the valve.

[0006] To achieve the above objectives, the anti-reflux urine bag multi-stage sealing valve assembly structure includes a sealing element that is sealed and inserted into the top of the urine bag body. The sealing element includes a limiting frame, and an anti-reflux structure is slidably connected inside the limiting frame. The limiting frame has a hollow internal structure, with an inlet channel at the top for liquid inlet and an outlet channel at the bottom for liquid outlet, and the cross-sectional area of ​​the outlet channel is larger than that of the inlet channel. The anti-backflow structure includes a pressure-bearing seat and a sealing seat from top to bottom. The sealing seat is located inside the liquid outlet channel and the cross-sectional area of ​​the sealing seat is larger than that of the liquid inlet channel. It is used to change the communication state between the liquid inlet channel and the liquid outlet channel and to prevent liquid from flowing back into the liquid inlet channel from the liquid outlet channel. A pair of scrapers are rotatably connected to the inner top wall of the liquid outlet channel. As the sealing seat gradually moves away from the inner top wall of the limiting frame, the contact state between the scraper and the top of the sealing seat changes from sealed to unsealed, allowing urine to enter the outlet channel from the inlet channel. When the top of the sealing seat approaches the inner top wall of the limiting frame, the scraper sweeps across the upper surface of the sealing seat from the edge to the center, pushing impurities remaining on the upper surface of the sealing seat from the edge to the side wall of the pressure seat, thereby preventing solid impurities, such as stones, from remaining on the upper surface of the sealing seat and affecting the sealing performance of the sealing seat to the inlet channel.

[0007] In the above technical solution, the cross-sectional area of ​​the sealing seat is smaller than the cross-sectional area of ​​the outlet channel. When the pressure seat slides down in the inlet channel under the pressure of urine, the sealing seat exposes a gap to allow urine to flow from the inlet channel into the outlet channel. Then the urine flows from the outlet channel into the urine bag body. After the patient finishes urinating, the sealing seat returns to its initial state where its top is tightly attached to the inner top wall of the outlet channel.

[0008] In another technical solution, limiting plates are fixedly connected to both sides of the sealing seat that are far apart, and a first limiting groove and a second limiting groove are opened on both sides of the liquid outlet channel that are far apart. The first limiting groove is located above the second limiting groove. An L-shaped plate is fixedly connected to the bottom of the two limiting plates, and the openings of the two L-shaped plates are opposite to each other. A plurality of guide rods are fixedly connected between the limiting plates and the L-shaped plates, and a spring is sleeved on the periphery of the guide rods between the bottom of the first limiting groove and the bottom of the limiting plate.

[0009] In the above scheme, the inner top wall of the liquid outlet channel is provided with a first mounting groove, the scraper is rotatably connected to the first mounting groove, and the end of the first mounting groove away from the rotating shaft is close to the sealing seat.

[0010] Furthermore, a second mounting groove is provided at both ends of the scraper shaft that are far apart. A coil spring is sleeved around the scraper. The inner ring of the coil spring is fixedly connected to the scraper shaft, and the outer ring of the coil spring is fixedly connected to the inner wall of the second mounting groove.

[0011] Continue reading Figure 8 and Figure 9 As shown, the first mounting groove has a retaining slope on one end of its sidewall near the scraper shaft. The retaining slope is used to limit the angle between the scraper and the horizontal plane, so that the angle is an acute angle.

[0012] Based on the above scheme, the scraper has an arc-shaped part at the end away from the rotating shaft, and the arc-shaped part has multiple liquid passage holes in a linear manner, the depth of which is less than the radius of the arc-shaped part.

[0013] The diameter of the fluid passage hole is not less than the diameter of the catheter.

[0014] The longitudinal section of the pressure-bearing seat is triangular. On the one hand, the geometric stability of the triangle allows the pressure from the urine to be stably distributed onto the sealing seat; on the other hand, the space formed by the triangle at the top of the pressure-bearing seat and the inner wall of the inlet channel provides a buffer for the urine, and also provides a temporary storage area for stones that have not passed through the inlet hole, while ensuring a seal to prevent urine backflow.

[0015] Based on the above description, the beneficial effects of the present invention compared with the prior art are as follows: When small stones from urethral or kidney stones are carried into the inlet channel with urine, most of them flow through the drainage holes into the urine bag. However, a small number of stones remain on the top of the sealing seat. These stones are located on the outside of the sealing seat. After the patient finishes urinating, the scraper slides from the edge to the center of the top of the sealing seat, thus scraping the stones remaining on the top of the sealing seat to the vicinity of the outer wall of the pressure seat. This prevents the top of the sealing seat from not being completely sealed due to the presence of stones, and thus prevents urine reflux. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is an exploded view of the overall structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a partial cross-sectional perspective view of the sealing element of the present invention; Figure 5 This is a cross-sectional perspective view of the limiting frame and the pressure bearing seat of the present invention. Figure 6 This is a partial sectional front view of the seal of the present invention; Figure 7 This is a partial sectional top view of the sealing element of the present invention; Figure 8 This is a sectional front view showing the separation of the limiting frame and the pressure seat of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of point B in the middle; Figure 10 This is a three-dimensional view of the scraper of the present invention.

[0017] The meanings of the labels in the diagram are as follows: 100. Urine bag body; 110. Fixing outer shell; 120. Urine catheter; 130. Limiting inner liner; 200. Limiting bracket; 201. Liquid inlet channel; 202. Liquid outlet channel; 203. First limiting groove; 204. Scraper; 205. Second limiting groove; 206. First mounting groove; 207. Slope; 210. Pressure bearing seat; 211. Sealing seat; 212. Limiting plate; 213. L-shaped plate; 214. Guide rod; 215. Spring; 300, Second mounting slot; 310, Coil spring; 320, Liquid passage hole. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-4 The purpose of this embodiment is to provide a multi-stage sealing valve assembly structure for an anti-backflow urine bag, including a sealing element that is sealed and inserted into the top of the urine bag body 100. The sealing element includes a limiting frame 200, and an anti-backflow structure is slidably connected inside the limiting frame 200. The limiting frame 200 has a hollow internal structure. It has an inlet channel 201 at the top for liquid inlet and an outlet channel 202 at the bottom for liquid outlet. The cross-sectional area of ​​the outlet channel 202 is larger than that of the inlet channel 201. The anti-backflow structure includes, from top to bottom, a pressure-bearing seat 210 and a sealing seat 211. The sealing seat 211 is located inside the liquid outlet channel 202 and the cross-sectional area of ​​the sealing seat 211 is larger than the cross-sectional area of ​​the liquid inlet channel 201. It is used to change the communication state between the liquid inlet channel 201 and the liquid outlet channel 202 and to prevent liquid from flowing back into the liquid inlet channel 201 from the liquid outlet channel 202. A pair of scrapers 204 are rotatably connected to the inner top wall of the liquid outlet channel 202. As the sealing seat 211 gradually moves away from the inner top wall of the limiting frame 200, the contact state between the scraper 204 and the top of the sealing seat 211 changes from sealed to unsealed, allowing urine to enter the outlet channel 202 from the inlet channel 201. When the top of the sealing seat 211 approaches the inner top wall of the limiting frame 200, the scraper 204 sweeps across the upper surface of the sealing seat 211 in a direction from the edge to the center, so as to push the impurities remaining on the upper surface of the sealing seat 211 from the edge to the side wall of the pressure seat 210, thereby preventing solid impurities, such as stones, from remaining on the upper surface of the sealing seat 211, which would affect the sealing performance of the sealing seat 211 to the inlet channel 201.

[0020] like Figures 4-8As shown, the cross-sectional area of ​​the sealing seat 211 is smaller than that of the outlet channel 202. When the pressure seat 210 slides down in the inlet channel 201 under the pressure of urine, the sealing seat 211 exposes a gap, allowing urine to flow from the inlet channel 201 into the outlet channel 202. Then, the urine flows from the outlet channel 202 into the urine bag body 100. After the patient finishes urinating, the sealing seat 211 returns to its initial state, with its top tightly against the inner top wall of the outlet channel 202. Therefore, when the urine in the urine bag body 100 is about to flow back due to compression or other reasons, the connection between the outlet channel 202 and the inlet channel 201 is blocked by the sealing seat 211, whose cross-sectional area is larger than that of the inlet channel 201. Thus, the urine flowing into the urine bag body 100 will not flow back into the patient's urethra.

[0021] The improvements are, please see Figure 4 and Figure 5 Limiting plates 212 are fixedly connected to both sides of the sealing seat 211, which are far apart from each other. A first limiting groove 203 and a second limiting groove 205 are provided on both sides of the outlet channel 202, which are far apart from each other. The first limiting groove 203 is located above the second limiting groove 205. An L-shaped plate 213 is fixedly connected to the bottom of the two limiting plates 212, with the openings of the two L-shaped plates 213 facing away from each other. Multiple guide rods 214 are fixedly connected between the limiting plates 212 and the L-shaped plates 213. A spring 215 is sleeved around the periphery of the guide rod 214 between the bottom of the first limiting groove 203 and the bottom of the limiting plate 212. In the non-urination state, the top of the sealing seat 211 is in close contact with the inner top wall of the outlet channel 202, and the spring 215 is in its natural state. When a patient begins to urinate, the bladder pressure in an adult rises to approximately 0.002-0.004 MPa. Urine flows from the catheter 120 into the space formed between the inlet channel 201 and the top of the pressure seat 210. Under the pressure of the urine on its top, the pressure seat 210 causes the sealing seat 211 to slide down. The limiting plate 212 moves down synchronously with the sealing seat 211 and drives the guide rod 214 to slide down. During this period, as the distance between the limiting plate 212 and the bottom wall of the first limiting groove 203 decreases, the spring 215 is compressed and stores elastic potential energy. When the patient finishes urinating, the pressure seat 210 loses the pressure of urine, and the spring 215 loses its pressing force. As a result, the stored elastic potential energy is released, which drives the sealing seat 211 to reset. This restores the sealing state between the top of the sealing seat 211 and the bottom wall of the outlet channel 202, and blocks the communication between the outlet channel 202 and the inlet channel 201, thus preventing urine from flowing back into the urethra from the urine bag body 100.

[0022] exist Figures 6-8 In the middle, the inner top wall of the liquid outlet channel 202 is provided with a first mounting groove 206, and the scraper 204 is rotatably connected in the first mounting groove 206. The end of the first mounting groove 206 away from the rotating shaft is close to the sealing seat 211.

[0023] Furthermore, a second mounting groove 300 is provided at both ends of the scraper 204 that are far apart from each other. A coil spring 310 is sleeved around the scraper 204. The inner ring of the coil spring 310 is fixedly connected to the rotating shaft of the scraper 204, and the outer ring of the coil spring 310 is fixedly connected to the inner wall of the second mounting groove 300.

[0024] Continue reading Figure 8 and Figure 9 As shown, in the first mounting groove 206 of the fourth figure, a retaining slope 207 is provided on the side wall near the rotating shaft of the scraper 204. The retaining slope 207 is used to limit the angle between the scraper 204 and the horizontal plane, making the angle acute, to prevent the end of the scraper 204 away from the rotating shaft from sliding off the inner top wall of the sealing seat 211. This allows the scraper 204 to be sealed after the patient has finished urinating. Figure 8 As shown, the sealing seat 211 is reset under the restoring force of the spring 215. While the sealing seat 211 is close to the inner top wall of the liquid outlet channel 202, the scraper 204 is pressed back into the first mounting groove 206, and at the same time, the coil spring 310 connected to the rotating shaft of the scraper 204 is tightened and stored elastic potential energy.

[0025] Based on the above explanation, the following will further combine... Figure 10 To explain the preferred effect of scraper 204, scraper 204 has an arc-shaped part at one end away from the rotating shaft. The arc-shaped part has multiple liquid passage holes 320 in a linear manner, and the depth of the liquid passage holes 320 is less than the radius of the arc-shaped part.

[0026] The diameter of the liquid passage 320 is not less than the diameter of the catheter 120.

[0027] It should be noted that when small stones from patients with urethral or kidney stones flow into the inlet channel 201 with urine, most of the stones pass through the drainage hole 320 and flow into the urine bag body 100. However, a small number of stones remain on the top of the sealing seat 211. These stones are located on the outside of the sealing seat 211. After the patient finishes urinating, the scraper 204 slides from the edge to the center of the top of the sealing seat 211, thereby scraping the stones remaining on the top of the sealing seat 211 to the vicinity of the outer wall of the pressure seat 210. This prevents the top of the sealing seat 211 from not being completely sealed with the side wall of the scraper 204 due to the presence of stones, thus preventing urine reflux.

[0028] Furthermore, the longitudinal section of the pressure-bearing seat 210 is triangular. On the one hand, the geometric stability of the triangle allows the pressure from the urine to be stably distributed onto the sealing seat 211; on the other hand, the space formed by the top triangle of the pressure-bearing seat 210 and the inner wall of the inlet channel 201 provides a buffer for the urine, and also provides a temporary storage area for stones that have not passed through the liquid passage 320, and ensures a seal to prevent urine backflow.

[0029] Please see Figure 2The limiting frame 200 is fitted with a limiting inner liner 130, which is connected vertically. A pair of symmetrically arranged fixing shells 110 are snapped onto the periphery of the limiting inner liner 130. The fixing shells 110 are used to insert into the top of the urine bag body 100 for easy replacement of the urine bag and easy cleaning of stones remaining on both sides of the sealing seat 211. The tops of the two fixing shells 110 are connected to the catheters 120.

[0030] In summary, the working principle of this invention is as follows: When the pressure seat 210 slides down in the inlet channel 201 under the pressure of urine, the sealing seat 211 exposes a gap, allowing urine to flow from the inlet channel 201 into the outlet channel 202. Then, the urine flows from the outlet channel 202 into the urine bag body 100. After the patient finishes urinating, the sealing seat 211 returns to its initial state where its top is tightly attached to the inner top wall of the outlet channel 202.

[0031] Therefore, when urine in the urine bag body 100 is about to flow back due to compression or other reasons, the connection between the outflow channel 202 and the inflow channel 201 is blocked by the sealing seat 211, which has a cross-sectional area larger than that of the inflow channel 201. Thus, the urine flowing into the urine bag body 100 will not flow back into the patient's urethra.

[0032] When small stones from urethral or kidney stones flow into the inlet channel 201 with urine, most of the stones pass through the drainage hole 320 and flow into the urine bag body 100. However, a small number of stones remain on the top of the sealing seat 211. These stones are located on the outside of the sealing seat 211. After the patient finishes urinating, the scraper 204 slides from the edge to the center of the top of the sealing seat 211, thereby scraping the stones remaining on the top of the sealing seat 211 to the vicinity of the outer wall of the pressure seat 210. This prevents the top of the sealing seat 211 from not being completely sealed with the side wall of the scraper 204 due to the presence of stones, thus preventing urine reflux.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage sealing valve assembly structure for an anti-backflow urine bag, comprising a sealing element that is sealed and inserted into the top of the urine bag body (100), the sealing element comprising a limiting frame (200), wherein the limiting frame (200) has an anti-backflow structure slidably connected inside, characterized in that: The limiting frame (200) is hollow inside, with an inlet channel (201) at the top and an outlet channel (202) at the bottom, and the cross-sectional area of ​​the outlet channel (202) is larger than that of the inlet channel (201). The anti-backflow structure includes, from top to bottom, a pressure bearing seat (210) and a sealing seat (211). The sealing seat (211) is located inside the liquid outlet channel (202) and the cross-sectional area of ​​the sealing seat (211) is larger than the cross-sectional area of ​​the liquid inlet channel (201). A pair of scrapers (204) are rotatably connected to the inner top wall of the liquid outlet channel (202). As the sealing seat (211) gradually moves away from the inner top wall of the limiting frame (200), the contact state between the scraper (204) away from the rotating shaft end and the top of the sealing seat (211) changes from sealed to unsealed, so that urine enters the outlet channel (202) from the inlet channel (201). When the top of the sealing seat (211) approaches the inner top wall of the limiting frame (200), the scraper (204) sweeps across the upper surface of the sealing seat (211) in the direction from the edge to the center.

2. The anti-reflux urine bag multi-stage sealing valve assembly structure according to claim 1, characterized in that: The cross-sectional area of ​​the sealing seat (211) is smaller than that of the liquid outlet channel (202).

3. The anti-reflux urine bag multi-stage sealing valve assembly structure according to claim 1, characterized in that: Limiting plates (212) are fixedly connected to both sides of the sealing seat (211) away from each other. A first limiting groove (203) and a second limiting groove (205) are opened on both sides of the liquid outlet channel (202) away from each other. The first limiting groove (203) is located above the second limiting groove (205). An L-shaped plate (213) is fixedly connected to the bottom of the two limiting plates (212). The openings of the two L-shaped plates (213) are opposite to each other. A plurality of guide rods (214) are fixedly connected between the limiting plates (212) and the L-shaped plates (213). A spring (215) is sleeved on the periphery of the guide rod (214) between the bottom of the first limiting groove (203) and the bottom of the limiting plate (212).

4. The anti-reflux urine bag multi-stage sealing valve assembly structure according to claim 1, characterized in that: The inner top wall of the liquid outlet channel (202) is provided with a first mounting groove (206), and the scraper (204) is rotatably connected in the first mounting groove (206). The end of the first mounting groove (206) away from the rotating shaft is close to the sealing seat (211).

5. The anti-reflux urine bag multi-stage sealing valve assembly structure according to claim 1, characterized in that: The scraper (204) has a second mounting groove (300) at both ends of the rotating shaft that are far apart. A coil spring (310) is sleeved around the scraper (204). The inner ring of the coil spring (310) is fixedly connected to the rotating shaft of the scraper (204), and the outer ring of the coil spring (310) is fixedly connected to the inner wall of the second mounting groove (300).

6. The anti-reflux urine bag multi-stage sealing valve assembly structure according to claim 4, characterized in that: The first mounting groove (206) has a retaining slope (207) on one end of the side wall near the rotating shaft of the scraper (204). The retaining slope (207) is used to limit the angle between the scraper (204) and the horizontal plane, so that the angle is an acute angle.

7. The anti-reflux urine bag multi-stage sealing valve assembly structure according to claim 1, characterized in that: The scraper (204) has an arc-shaped part at one end away from the rotating shaft. The arc-shaped part has multiple liquid passage holes (320) in a linear manner. The depth of the liquid passage holes (320) is less than the radius of the arc-shaped part.

8. The anti-reflux urine bag multi-stage sealing valve assembly structure according to claim 7, characterized in that: The diameter of the liquid passage (320) is not less than the diameter of the catheter (120).

9. The anti-reflux urine bag multi-stage sealing valve assembly structure according to claim 1, characterized in that: The longitudinal section of the bearing seat (210) is triangular.

10. The anti-reflux urine bag multi-stage sealing valve assembly structure according to claim 1, characterized in that: The limiting frame (200) is fitted with a limiting inner liner (130) on the outside. The limiting inner liner (130) is connected vertically. A pair of symmetrically arranged fixed outer shells (110) are snapped around the periphery of the limiting inner liner (130). A urinary catheter (120) is connected to the top of the two fixed outer shells (110).

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