Anti-overpressure self-relieving infusion pressure bag structure

Abstract

The application discloses a kind of anti-overpressure self pressure relief type infusion pressurizing bag structure, more specifically relates to infusion pressurizing technical field, including pressurizing bag, one end of the pressurizing bag is communicated with exhaust cylinder, the inner wall of the exhaust cylinder is fixed with orifice plate;The inner wall of the orifice plate is provided with the aperture of the small hole, the medium hole and the large hole in order to increase;The side of the orifice plate is correspondingly contacted with small pad, medium pad and large pad for plugging small hole, medium hole and large hole respectively;The side of the small pad is equipped with ladder adjusting part.The application realizes three-stage ladder type dynamic pressure relief, greatly improves the adaptive adjustment ability of pressure relief area, and has the advantages that pressure relief response is more timely and efficient, thereby solving the problem that it is difficult to realize dynamic ladder adjustment of pressure relief area according to real-time pressure, greatly reducing the pressure relief adaptability of infusion pressurizing bag structure, and the problem that pressure relief response is relatively inefficient.

Description

Technical Field

[0001] This invention relates to the field of infusion pressurization technology, and more specifically, to a self-releasing infusion pressurization bag structure that prevents overpressure. Background Technology

[0002] In the biomedical engineering industry, the overpressure-resistant self-releasing infusion pressurization bag is a "life booster" in the field of emergency care. Its core structure—the air reservoir, trachea, air valve, and mechanical pressure limiting valve—work together to apply uniform positive pressure to the infusion bag through manual or electric inflation, increasing the infusion rate to 3 to 5 times that of the conventional method, effectively preventing hemolysis of red blood cells and rupture of blood vessels, and ensuring blood transfusion safety.

[0003] When the infusion bag is squeezed, excessive pressure will trigger pressure relief. However, the traditional structure uses a fixed pressure relief area, which makes it difficult to automatically increase the pressure relief channel when the pressure rises sharply. This results in delayed pressure release and poor adjustment capability, making it difficult to dynamically adjust the pressure relief area according to the real-time pressure. This significantly reduces the pressure relief adaptability of the infusion bag structure and makes the pressure relief response relatively inefficient. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, the present invention provides the following technical solution: an overpressure-resistant self-relieving infusion pressure bag structure, comprising a pressure bag, one end of which is connected to an exhaust pipe, and a perforated plate is fixed to the inner wall of the exhaust pipe; The inner wall of the perforated plate is provided with small holes, medium holes and large holes with progressively increasing diameters; One side of the perforated plate is respectively abutted by small pads, medium pads, and large pads used to seal small holes, medium holes, and large holes; One side of the small pad is provided with a stepped adjustment component; When the internal pressure of the pressure bag increases, the small pad is first compressed and drives the stepped adjustment component to perform the first step linkage, so that the small pad is disengaged from the small hole for first-level pressure relief. As the internal pressure of the pressure bag continues to increase, the middle pad is compressed and drives the stepped adjustment component to perform a second-step linkage, causing the middle pad to disengage from the middle hole for secondary pressure relief. When the internal pressure of the pressure bag increases further, the large pad is compressed and drives the stepped adjustment component to perform the third-stage linkage, causing the large pad to disengage from the large hole for three-stage pressure relief.

[0005] In a preferred embodiment, the small holes, medium holes, and large holes are arranged sequentially from top to bottom; The vertical cross-sectional area of ​​the small hole is smaller than that of the medium hole, and the vertical cross-sectional area of ​​the medium hole is smaller than that of the large hole.

[0006] In a preferred embodiment, the vertical cross-sectional area of ​​the small pad is smaller than that of the medium pad, and the vertical cross-sectional area of ​​the medium pad is smaller than that of the large pad.

[0007] In a preferred embodiment, the small pad, the medium pad, and the large pad are arranged sequentially from top to bottom, and all of the small pad, the medium pad, and the large pad are made of silicone material.

[0008] In a preferred embodiment, the stepped adjustment member includes: A movable cover is fixed to one end of a small pad, and a sleeve is fixedly connected to one side of the movable cover; A guide post is slidably connected to the inner wall of the sleeve, and a support bar is fixed at one end of the guide post; A spring sheet is positioned above the guide post, and both the support bar and the sleeve are fixedly connected to the spring sheet; A linkage cover is fixed to one end of the central pad, and a pressure strip is fixedly connected to one side of the linkage cover; A double spring sheet is fixedly installed between the pressure sleeve strip and the support strip, and the double spring sheet is used to provide elastic force to the pressure sleeve strip; A compression cap is fixedly installed at one end of a large pad. A guide shaft is connected to the inner wall of the compression sleeve. Both the support strip and the compression cap are fixedly connected to the guide shaft. The guide shaft is used to guide the sliding of the compression sleeve. A connecting plate is fixedly connected to one side of the extrusion cover, and a double-moving spring piece is fixedly connected to one end of the connecting plate; A pressure spring sheet is fixed to the inner wall of a double-acting spring sheet, and the double-acting spring sheet is fixedly connected to the support bar; A protruding rod is provided on the inner wall of the connecting plate. The protruding rod is fixedly connected to the support bar. The protruding rod is used to guide the sliding of the connecting plate. The protruding rod is fixedly connected to the perforated plate.

[0009] In a preferred embodiment, the elastic force of the spring piece is less than the elastic force of the double spring pieces, and the elastic force of the double spring pieces is less than the combined elastic force of the double-moving spring piece and the pressing spring piece.

[0010] In a preferred embodiment, the sleeve abuts against the linkage cover, and a gap is provided between the sleeve and the pressure sleeve.

[0011] In a preferred embodiment, the pressure sleeve and the extrusion cap abut against each other; The guide posts, guide shafts, and protruding rods are arranged from top to bottom.

[0012] In a preferred embodiment, the inner wall of the pressurized bag is provided with a cavity for storing pressurized air; Two hanging holes are provided at the other end of the pressure bag.

[0013] In a preferred embodiment, a valve is connected to one end of the pressurized bag and at a position away from the exhaust pipe, the valve being used to allow pressurized air to enter the interior of the pressurized bag.

[0014] The technical effects and advantages of the present invention.

[0015] 1. This invention employs a stepped pressure relief structure with small, medium, and large holes of progressively increasing diameter on an orifice plate, and small, medium, and large pads that are sequentially sealed. This allows the pressure relief area to automatically switch from the smallest small hole to the medium hole and then to the largest large hole as the pressure increases, achieving three-stage stepped dynamic pressure relief. This significantly improves the adaptive adjustment capability of the pressure relief area, making the pressure relief response more timely and efficient.

[0016] 2. This invention employs a stepped adjustment component consisting of a movable cover, a sleeve, a spring, a linkage cover, a pressure sleeve, a double spring, a squeeze cover, a connecting plate, a double-moving spring, and a pressure spring. The elasticity of the spring, double spring, double-moving spring, and pressure spring increases sequentially, so that each level of pressure relief is automatically triggered in sequence according to the pressure magnitude, ensuring precise matching of low-pressure small-area pressure relief and high-pressure large-area pressure relief.

[0017] 3. The present invention uses guide posts, guide shafts and protruding rods to slide and guide the sleeve strips, pressure sleeve strips and connecting plates, so that the movement of each level of pad body is smooth and the positioning is accurate when it is disengaged from the corresponding hole, avoiding jamming or false triggering during the pressure relief process, and ensuring the reliability and continuity of the three-stage pressure relief switching. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the anti-overpressure self-relieving infusion pressure bag of the present invention.

[0019] Figure 2 This is a partial structural diagram of the vertical cross-section of the exhaust stack according to the present invention.

[0020] Figure 3 This is a partial structural diagram of the vertical cross-section of the connection between the small pad and the movable cover of the present invention.

[0021] Figure 4 This is a partial structural diagram of the vertical cross-section of the connection between the middle pad and the linkage cover of the present invention.

[0022] Figure 5 This is a partial structural diagram of the spring, double spring, and double-moving spring of the present invention.

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the anti-overpressure self-releasing infusion pressure bag of the present invention.

[0024] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle.

[0025] Figure 8 This is a side view of the structure of the self-releasing infusion pressure bag for overpressure prevention according to the present invention.

[0026] The attached diagram is labeled as follows: 1. Pressure bag; 2. Exhaust pipe; 3. Orifice plate; 4. Small hole; 5. Medium hole; 6. Large hole; 7. Small pad; 8. Medium pad; 9. Large pad; 10. Moving cover; 11. Sleeve; 12. Guide post; 13. Spring; 14. Support bar; 15. Linkage cover; 16. Pressure sleeve; 17. Double spring; 18. Compression cover; 19. Guide shaft; 20. Connecting plate; 21. Double-moving spring; 22. Pressure spring; 23. Protruding rod; 24. Cavity; 25. Hanging hole; 26. Valve. Detailed Implementation

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1: In this embodiment, as Figure 1 - Figure 2 The diagram illustrates a self-releasing infusion bag structure designed to prevent overpressure. It includes a pressure bag 1, with an exhaust pipe 2 connected to one end. An orifice plate 3 is fixed to the inner wall of the exhaust pipe 2. The inner wall of the orifice plate 3 has successively increasing diameter holes 4, 5, and 6. One side of the orifice plate 3 has corresponding pads 7, 8, and 9 for sealing the holes 4, 5, and 6, respectively. A stepped adjustment element is provided on one side of the pads 7. The holes 4, 5, and 6 are arranged sequentially from top to bottom. The vertical cross-sectional area of ​​the hole 4 is smaller than that of the hole 5, and the vertical cross-sectional area of ​​the hole 5 is smaller than that of the hole 6. The vertical cross-sectional area of ​​the pad 7 is smaller than that of the pad 8, and the vertical cross-sectional area of ​​the pad 8 is smaller than that of the pad 9. The pads 7, 8, and 9 are arranged sequentially from top to bottom and are all made of silicone.

[0029] In the biomedical engineering industry, this technology involves placing an infusion bag inside a pressure bag 1. When the internal pressure of the pressure bag 1 increases, the small pad 7 is initially compressed, driving the step adjustment mechanism to perform the first-stage linkage, causing the small pad 7 to disengage from the small hole 4 for primary pressure relief. As the internal pressure of the pressure bag 1 continues to increase, the middle pad 8 is compressed, driving the step adjustment mechanism to perform the second-stage linkage, causing the middle pad 8 to disengage from the middle hole 5 for secondary pressure relief. When the internal pressure of the pressure bag 1 further increases, the large pad 9 is compressed, driving the step adjustment mechanism to perform the third-stage linkage, causing the large pad 9 to disengage from the large hole 6 for tertiary pressure relief. Since the area of ​​the large hole 6 is larger than that of the middle hole 5, and the area of ​​the middle hole 5 is larger than that of the small hole 4, pressure is first released over a small area through the small hole 4, then over a medium area through the middle hole 5, and finally over a large area through the large hole 6. This allows for dynamic step adjustment of the pressure relief area based on the real-time pressure, significantly improving the pressure relief adaptability of the infusion pressure bag structure.

[0030] Example 2: In this embodiment, as Figure 2 - Figure 5 As shown, the stepped adjustment component includes: a movable cover 10, fixed to one end of the small pad 7, with a sleeve 11 fixedly connected to one side of the movable cover 10; a guide post 12, slidably connected to the inner wall of the sleeve 11, with a support strip 14 fixed to one end of the guide post 12; a spring piece 13, disposed above the guide post 12, with both the support strip 14 and the sleeve 11 fixedly connected to the spring piece 13; a linkage cover 15, fixed to one end of the middle pad 8, with a pressure sleeve 16 fixedly connected to one side of the linkage cover 15; a double spring piece 17, fixedly installed between the pressure sleeve 16 and the support strip 14, the double spring piece 17 providing elasticity to the pressure sleeve 16; and a compression cover 18, fixedly installed... At one end of the large pad 9, a guide shaft 19 is connected to the inner wall of the pressure sleeve 16. The support bar 14 and the extrusion cover 18 are both fixedly connected to the guide shaft 19, which guides the sliding of the pressure sleeve 16. A connecting plate 20 is fixedly connected to one side of the extrusion cover 18, and a double-acting spring piece 21 is fixedly connected to one end of the connecting plate 20. A pressure spring piece 22 is fixed to the inner wall of the double-acting spring piece 21, and the double-acting spring piece 21 is fixedly connected to the support bar 14. A protruding rod 23 is disposed on the inner wall of the connecting plate 20, and the protruding rod 23 is fixedly connected to the support bar 14. The protruding rod 23 guides the sliding of the connecting plate 20 and is fixedly connected to the perforated plate 3. The elastic force of the spring piece 13 is less than the elastic force of the double spring piece 17, and the elastic force of the double spring piece 17 is less than the combined elastic force of the double-acting spring piece 21 and the pressure spring piece 22. The sleeve 11 abuts against the linkage cover 15. The pressure strip 16 abuts against the extrusion cover 18; the guide post 12, the guide shaft 19, and the protruding rod 23 are arranged from top to bottom.

[0031] When this technology is used in the biomedical engineering industry, when the air pressure inside the pressure bag 1 increases, the air pressure inside the pressure bag 1 begins to enter the exhaust pipe 2, which is blocked by the perforated plate 3. At the same time, the perforated plate 3 supports the protruding rod 23, the protruding rod 23 supports the support bar 14, the support bar 14 supports the spring piece 13, the spring piece 13 provides a small elastic compressive force to the movable cover 10, the support bar 14 supports the double spring piece 17, the double spring piece 17 provides a relatively central elastic compressive force to the pressure sleeve strip 16, and at the same time the support bar 14 supports the double moving spring piece 21, the double moving spring piece 21 is supported by the pressure spring piece 22, so the double moving spring piece 21 and the pressure spring piece 22, when superimposed, provide a large elastic compressive force to the connecting sleeve plate 20.

[0032] When the internal pressure of the exhaust pipe 2 increases, it will squeeze the small pad 7 through the small hole 4. After the small pad 7 is subjected to force, it will drive the movable cover 10 to move to the left. The movable cover 10 will drive the sleeve 11 to move to the left. At the same time, the sleeve 11 will squeeze the spring piece 13. The protruding rod 23 supports the support bar 14. The support bar 14 supports the spring piece 13. The sleeve 11 will be guided to move to the left along the outer wall of the guide post 12, so that the small pad 7 will disengage from the small hole 4 to perform a small-area first-stage pressure relief. As the internal pressure of the pressure bag 1 continues to increase, the pressure will begin to squeeze the middle pad 8 through the perforated plate 3. The middle pad 8 drives the linkage cover 15 to move to the left, and the linkage cover 15 squeezes the double spring sheet 17. The spring sheet 13 is compressed on the support bar 14, and the pressure sleeve 16 is guided to move to the left along the outer wall of the guide shaft 19. In this way, the middle pad 8 is separated from the middle hole 5, so that the middle pad 8 is separated from the middle hole 5 to perform secondary pressure relief in the middle area and increase the pressure relief area. When the internal pressure of the pressure bag 1 continues to increase, the air pressure enters the large hole 6 and squeezes the large pad 9 through the large hole 6. The large pad 9 begins to drive the compression cover 18 to move to the left, and the compression cover 18 drives the connecting plate 20 to move to the left. The connecting plate 20 squeezes the double moving spring sheet 21. The internal pressure spring sheet 21 is provided with compression force by the pressure spring sheet 22. In this way, the connecting plate 20 is guided to move to the left along the outer wall of the protrusion 23, so that the large pad 9 begins to move away from the large hole 6, so that the large pad 9 is separated from the large hole 6 to perform tertiary large area pressure relief. In this way, the pressure relief efficiency is faster.

[0033] Example 3: In this embodiment, as Figure 6 - Figure 8 As shown, the inner wall of the pressurized bag 1 has a cavity 24 for storing pressurized air; the other end of the pressurized bag 1 has two hanging holes 25. A valve 26 is connected to one end of the pressurized bag 1 and away from the exhaust pipe 2. The valve 26 is used for pressurized air to enter the interior of the pressurized bag 1.

[0034] During installation, the infusion bag is placed in the inner groove of the pressure bag 1, then the pressure bag 1 is stood upright. The two hanging holes 25 are hung on the hooks of the infusion stand to suspend the pressure bag 1. After opening the valve 26, the valve 26 is threadedly connected to the output end of the pump. The pressure is increased into the valve 26 and enters the cavity 24 inside the pressure bag 1 through the valve 26. After the pressure bag 1 expands, it can squeeze the infusion bag, thus completing the pressurization process of the infusion bag, which facilitates the infusion operation for the patient after the infusion bag is pressurized.

[0035] The above description is only a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Modifications, equivalent substitutions, etc., made within the scope of the technical solution of the present invention should all fall within the protection scope of the present invention.

Claims

1. A self-relieving infusion pressure bag structure to prevent overpressure, comprising a pressure bag (1), characterized in that: One end of the pressure bag (1) is connected to an exhaust pipe (2), and the inner wall of the exhaust pipe (2) is fixed with a perforated plate (3). The inner wall of the perforated plate (3) is provided with small holes (4), medium holes (5) and large holes (6) with successively increasing diameters. One side of the perforated plate (3) is respectively in contact with small pads (7), medium pads (8) and large pads (9) used to seal small holes (4), medium holes (5) and large holes (6). The small pad (7) is provided with a stepped adjustment component on one side; When the internal pressure of the pressure bag (1) increases, the small pad (7) is pressed first and drives the step adjustment component to perform the first step linkage, so that the small pad (7) is disengaged from the small hole (4) for first-level pressure relief; When the internal pressure of the pressure bag (1) continues to increase, the middle pad (8) is compressed and drives the stepped adjustment component to perform the second stepped linkage, so that the middle pad (8) is disengaged from the middle hole (5) for secondary pressure relief; When the internal pressure of the pressure bag (1) increases further, the large pad (9) is compressed and drives the stepped adjustment component to perform the third-step linkage, so that the large pad (9) is disengaged from the large hole (6) for three-stage pressure relief.

2. The overpressure-resistant self-relieving infusion pressure bag structure according to claim 1, characterized in that: The small hole (4), the medium hole (5), and the large hole (6) are arranged in order from top to bottom; The vertical cross-sectional area of ​​the small hole (4) is smaller than that of the middle hole (5), and the vertical cross-sectional area of ​​the middle hole (5) is smaller than that of the large hole (6).

3. The overpressure-resistant self-relieving infusion pressure bag structure according to claim 1, characterized in that: The vertical cross-sectional area of ​​the small pad (7) is smaller than that of the middle pad (8), and the vertical cross-sectional area of ​​the middle pad (8) is smaller than that of the large pad (9).

4. The overpressure-resistant self-relieving infusion pressure bag structure according to claim 1, characterized in that: The small pad (7), the medium pad (8), and the large pad (9) are arranged in order from top to bottom, and the small pad (7), the medium pad (8), and the large pad (9) are all made of silicone material.

5. The overpressure-resistant self-relieving infusion pressure bag structure according to claim 1, characterized in that: The stepped adjustment component includes: A movable cover (10) is fixed to one end of a small pad (7), and a sleeve (11) is fixedly connected to one side of the movable cover (10). The guide post (12) is slidably connected to the inner wall of the sleeve (11), and a support bar (14) is fixed at one end of the guide post (12). A spring piece (13) is disposed above the guide post (12), and the support bar (14) and the sleeve (11) are both fixedly connected to the spring piece (13); A linkage cover (15) is fixed to one end of the middle pad (8), and a pressure strip (16) is fixedly connected to one side of the linkage cover (15). A double spring sheet (17) is fixedly installed between the pressure sleeve strip (16) and the support strip (14), and the double spring sheet (17) is used to provide elastic force to the pressure sleeve strip (16); The compression cap (18) is fixedly installed at one end of the large pad (9). The inner wall of the compression sleeve (16) is connected to the guide shaft (19). The support (14) and the compression cap (18) are both fixedly connected to the guide shaft (19). The guide shaft (19) is used to guide the compression sleeve (16) to slide. A connecting plate (20) is fixedly connected to one side of the extrusion cover (18), and a double moving spring piece (21) is fixedly connected to one end of the connecting plate (20). A pressure spring sheet (22) is fixed to the inner wall of a double-moving spring sheet (21), and the double-moving spring sheet (21) is fixedly connected to the support bar (14); A protruding rod (23) is provided on the inner wall of the connecting plate (20). The protruding rod (23) is fixedly connected to the support (14). The protruding rod (23) is used to guide the sliding of the connecting plate (20). The protruding rod (23) is fixedly connected to the perforated plate (3).

6. The overpressure-resistant self-relieving infusion pressure bag structure according to claim 5, characterized in that: The elastic force of the spring piece (13) is less than that of the double spring piece (17), and the elastic force of the double spring piece (17) is less than the combined elastic force of the double-moving spring piece (21) and the pressing spring piece (22).

7. The overpressure-resistant self-relieving infusion pressure bag structure according to claim 5, characterized in that: The sleeve (11) abuts against the linkage cover (15), and there is a gap between the sleeve (11) and the pressure sleeve (16).

8. The overpressure-resistant self-relieving infusion pressure bag structure according to claim 5, characterized in that: The pressure sleeve (16) abuts against the extrusion cap (18); The guide post (12), guide shaft (19), and protruding rod (23) are arranged from top to bottom.

9. The overpressure-resistant self-relieving infusion pressure bag structure according to claim 1, characterized in that: The inner wall of the pressurized bag (1) is provided with a cavity (24) for storing pressurized air. Two hanging holes (25) are provided at the other end of the pressure bag (1).

10. The overpressure-resistant self-relieving infusion pressure bag structure according to claim 1, characterized in that: A valve (26) is connected to one end of the pressurized bag (1) and at a position away from the exhaust pipe (2), the valve (26) being used to pressurize air to enter the interior of the pressurized bag (1).

Images