A safety disc for counterpulsation balloons

Abstract

This invention discloses a safety disc for an intra-aortic balloon counterpulsation device, belonging to the field of medical device technology. It includes an upper shell, a lower shell, and a diaphragm. The upper and lower shells are symmetrical, arc-shaped convex cavities with a spiral groove on the inner wall centered on a vent, exhibiting a gradually changing cross-sectional area and varying curvature. Corresponding reinforcing ribs are provided on the outer surface. The disc is integrally molded from modified PC / ABS composite material. The diaphragm is a polyurethane film, thin in the middle and thick around the edges, with a deformation sensing layer made of flexible conductive material sandwiched between it. This layer is electrically connected to an external interface, signal processing unit, and alert module, calculating the deformation rate through resistance signals to provide aging warnings. The upper and lower shells and the diaphragm are detachably and sealed, with symmetrically distributed sealing joints and sealing ring grooves. This invention achieves uniform airflow distribution and rapid response, improves diaphragm deformation synchronization, allows real-time monitoring of diaphragm aging, reduces maintenance costs, and features a stable structure and long service life, making it suitable for intra-aortic balloon counterpulsation devices.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically a safety disc for a counterpulsation balloon. Background Technology

[0002] Intra-aortic balloon counterpulsation (IACP) is a core mechanical circulatory support technology used clinically for critically ill patients with severe heart failure, acute myocardial infarction, and other serious conditions. It involves a balloon implanted in the aorta working in conjunction with a counterpulsation device. Using gas to drive the precise expansion and contraction of the balloon, it assists in ventricular pumping and improves systemic blood perfusion, making it a crucial medical intervention for saving the lives of high-risk cardiovascular patients. The counterpulsation device mainly consists of a balloon catheter and a counterpulsation unit. The safety disc, as a key safety isolation component connecting the counterpulsation unit and the balloon catheter, directly determines the safety and effectiveness of the treatment.

[0003] The core function of a safety disc is to physically isolate the power system from the balloon inside the patient's body through an internal polymer membrane. This buffers the high-pressure impact of the driving gas, preventing direct vascular damage. Furthermore, the flexible deformation of the membrane transmits pressure signals, driving the balloon to perform synchronized counterpulsation. However, most existing safety discs employ a disc-shaped, hollow, arc-shaped structure. Gas entering the disc through a single vent diffuses randomly, resulting in an extremely uneven flow field within the shell. The pressure difference between the central and peripheral areas of the membrane can reach up to 30%, causing diaphragm movement lag and untimely response. This also leads to the balloon's expansion / contraction rhythm being out of sync with the patient's heart rate, reducing counterpulsation efficiency and even increasing the patient's cardiac workload.

[0004] The existing diaphragm has poor synchronization and coordination, and is more prone to fatigue damage at stress concentration points under long-term use. Once the diaphragm is damaged or fails, the entire safety disc needs to be replaced. Not only does the cost of a single safety disc reach several thousand yuan, but it also causes a sharp increase in equipment maintenance costs. For critically ill patients who rely on continuous counterpulsation support, the long interruption time for equipment replacement may cause hemodynamic fluctuations and bring fatal risks.

[0005] Existing safety disc shell materials struggle to balance rigidity and toughness, leading to issues like fatigue cracking and surface wear after prolonged use. Uneven stress distribution causes structural deformation under high-frequency pressure cycling, resulting in decreased sealing performance and increased risk of gas leakage. Insufficient aging and corrosion resistance cause rapid material performance degradation under clinical disinfection and long-term environmental exposure, resulting in an average lifespan of safety discs far shorter than the overall service life of counterpulsation devices, further increasing hospital equipment procurement and maintenance costs.

[0006] Current technology relies solely on regular visual inspections by maintenance personnel or fixed-cycle replacement of the safety disc. This passive maintenance model has significant drawbacks: if the replacement cycle is too short, it will result in material and cost waste; if the diaphragm ages and breaks prematurely due to individual usage differences, it may lead to high-pressure gas leakage if not detected in time, directly threatening the patient's vascular safety; and diaphragms that have exceeded their service life may also cause distortion of counterpulsation pressure transmission due to loss of elasticity, affecting the treatment effect. Summary of the Invention

[0007] The purpose of this invention is to provide a safety disc for counterpulsation balloons that is structurally stable, has a fast response, a long service life, and an aging monitoring function.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] The safety disc for counterpulsation balloons includes a shell and a diaphragm. The shell comprises an upper shell and a lower shell. The upper and lower shells are symmetrical cavities with arc-shaped protrusions. The inner walls of the upper and lower shells are respectively provided with spiral grooves. The tops of the upper and lower shells are respectively provided with vent holes, which are connected to a sealing joint located on the outside of the shell for connecting to an external gas pipeline. The spiral grooves are variable curvature airflow channels spirally distributed around the vent holes. The outer surface of the shell is provided with reinforcing ribs corresponding to the spiral grooves. A diaphragm is stacked between the upper and lower shells. The diaphragm includes an upper substrate and a lower substrate. A deformation sensing layer for detecting the aging degree of the diaphragm is also stacked between the upper substrate and the lower substrate. The upper shell, diaphragm, and lower shell are detachably and sealed together.

[0010] In the aforementioned safety disc, the spiral groove is an airflow channel with a semi-circular cross-section, and the cross-sectional area of ​​the spiral groove gradually decreases from the top of the shell to the edge of the shell; the curvature of the spiral groove gradually decreases from the top of the shell to the edge, and the curvature is equal at the same radial position.

[0011] In the aforementioned safety panel, the diaphragm is also electrically connected in sequence to an external interface, a signal processing unit, and an alert module. The signal processing unit is used to read the resistance signal of the diaphragm in real time. After noise reduction processing, the deformation rate ε is calculated. When the deformation rate ε is greater than or equal to a preset threshold, the alert module is triggered to sound an alarm. The formula for calculating the deformation rate ε is:

[0012]

[0013] In the formula, R0 is the initial resistance of the diaphragm, R a This is the real-time resistance value.

[0014] In the aforementioned safety panel, the alert module provides an alarm by flashing lights, beeping, or displaying text indicating that the diaphragm needs to be replaced.

[0015] In the aforementioned safety disc, both the upper and lower substrates are circular polyurethane films that gradually thicken from the center outwards; the thickness of the diaphragm ranges from 0.1 mm to 0.5 mm.

[0016] In the aforementioned safety disk, the deformation sensing layer is a strip-shaped flexible conductive material; the flexible conductive material is selected from at least one of graphene / polyurethane, silver nanopowder / polyurethane, and liquid metal / polyurethane composite materials; the upper substrate, the deformation sensing layer, and the lower substrate are integrated into a single structure through a hot-pressing composite process.

[0017] In the aforementioned safety disc, a first cavity is formed between the diaphragm and the upper housing, and a second cavity is formed between the diaphragm and the lower housing; the first cavity and the second cavity are arranged symmetrically.

[0018] In the aforementioned safety disc, the reinforcing ribs include a first reinforcing rib and a second reinforcing rib; the outer surface of the upper shell is provided with a first reinforcing rib corresponding to the internal spiral groove, and the outer surface of the lower shell is provided with a second reinforcing rib corresponding to the internal spiral groove, wherein the cross-section of the first reinforcing rib and the second reinforcing rib is semi-circular.

[0019] In the aforementioned safety disc, the sealing joint includes a first sealing joint and a second sealing joint; the outer side of the upper housing is connected to the first sealing joint, and the outer side of the lower housing is connected to the second sealing joint. The first sealing joint and the second sealing joint are symmetrically distributed along the radial direction of the housing. The end of the first sealing joint is provided with a first sealing ring groove, and the end of the second sealing joint is provided with a second sealing ring groove. The first sealing ring groove and the second sealing ring groove are circumferentially extending annular grooves.

[0020] In the aforementioned safety disc, the housing is integrally molded using modified PC / ABS composite material.

[0021] The beneficial effects of this invention are:

[0022] This invention achieves uniform airflow distribution and rapid mass transfer through a spiral, variable curvature, and gradually changing cross-sectional area gas flow channel design within the shell, improving the synchronous coordination and response speed of diaphragm deformation. The use of a modified PC / ABS composite material integrally molded shell with corresponding spiral groove reinforcing ribs significantly enhances structural strength, rigidity, and wear resistance, extending the overall service life of the safety disc. The use of a gradually thickening diaphragm (thin in the middle, thick around the edges) and a hot-pressed composite deformation sensing layer reduces diaphragm stress concentration, extends its service life, and allows for real-time monitoring of diaphragm aging via resistance signals. Combined with an alert module, this provides precise early warning, preventing safety hazards and material waste. Furthermore, the detachable and sealed connection design of the upper shell, diaphragm, and lower shell allows for individual replacement of damaged diaphragms, significantly reducing equipment maintenance and repair costs. Overall, this invention achieves core advantages such as structural stability, rapid response, safety and reliability, and convenient operation and maintenance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the diaphragm structure described in this invention;

[0025] Figure 3 This is a schematic diagram of the structure of the diaphragm aging detection component of the present invention.

[0026] In the figure: 1-upper shell, 2-diaphragm, 3-lower shell, 4-first cavity, 5-second cavity, 6-external interface, 7-signal processing unit, 8-indication module, 11-spiral groove, 12-vent hole, 13-first sealing joint, 14-first reinforcing rib, 15-first sealing ring groove, 21-upper substrate, 22-deformation sensing layer, 23-lower substrate, 33-second sealing joint, 44-second reinforcing rib, 25-second sealing ring groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0028] Example 1

[0029] refer to Figures 1 to 3 The present invention relates to a safety disc for counterpulsation balloon, comprising a shell and a diaphragm 2; the shell comprises an upper shell 1 and a lower shell 3; the upper shell 1 and the lower shell 3 are symmetrical cavities with arc-shaped protrusions, the inner walls of the upper shell 1 and the lower shell 3 are respectively provided with spiral grooves 11, and the tops of the upper shell 1 and the lower shell 3 are respectively provided with vent holes 12.

[0030] The spiral grooves 11 are spirally distributed outwards from the vent 12. The grooves 11 are semi-circular airflow channels with a cross-sectional area that gradually decreases from the top to the edge of the shell. This gradual increase in gas velocity within the semi-circular flow channel improves flow efficiency. The curvature of the spiral grooves 11 gradually decreases from the top to the edge of the shell, and the curvature is equal at the same radial position. The curvature of the airflow channel is negatively correlated with the flow velocity; a larger curvature (more tortuous channel) results in stronger local resistance to gas flow, leading to a lower effective flow velocity. Conversely, a smaller curvature (smoother channel) results in smoother gas flow, reduced resistance loss, more stable flow velocity, and a faster overall flow. This invention's reduced-curvature flow channel layout effectively guides gas, improving flow efficiency. The gradually decreasing curvature prevents the gas from entering the cavity at an excessively high speed, avoiding direct impact on the center of diaphragm 2. This allows the gas to diffuse rapidly towards the edges, ensuring a balanced and stable pressure across diaphragm 2 after entry, preventing delays in diaphragm 2 movement caused by uneven airflow distribution. The gradient design of the spiral groove significantly improves the uniformity of the flow field, achieving a more uniform airflow distribution. The semi-circular flow channel cross-section increases the gas transmission rate and shortens the diaphragm response time, resulting in rapid and timely diaphragm movement. The high flow resistance at the large curvature at the beginning slows down the initial gas inflow velocity, preventing uneven deformation caused by rapid expansion in the central area of ​​the safety disk. The low flow resistance at the small curvature at the end accelerates gas diffusion towards the edges, ensuring synchronous expansion of the entire safety disk.

[0031] refer to Figure 2 A diaphragm 2 is superimposed between the upper shell 1 and the lower shell 3. The diaphragm 2 includes an upper substrate 21 and a lower substrate 23, both of which are circular polyurethane films that gradually thicken from the center outwards. The thickness of the diaphragm 2 ranges from 0.1 mm to 0.5 mm. A deformation sensing layer 22 for detecting the aging degree of the diaphragm 2 is also superimposed between the upper substrate 21 and the lower substrate 23. The deformation sensing layer 22 is a strip-shaped flexible conductive material; the flexible conductive material is selected from graphene / polyurethane or liquid metal / polyurethane composite materials. The upper substrate 21, the deformation sensing layer 22, and the lower substrate 23 are formed into an integrated structure through a hot-pressing composite process, resulting in a diaphragm 2 with a thickness distribution that is thinner in the center and thicker at the edges. The diaphragm 2 is detachably connected to the joint between the upper shell 1 and the lower shell 3 by limiting screws. The diaphragm is a polyurethane film that is thin in the middle and thick around the edges. This gradually varying thickness of the diaphragm results in a deformation that gradually decreases from the middle to the edges when subjected to actual stress, ensuring the synchronous coordination of the diaphragm's arc-shaped deformation.

[0032] A sealing ring is also provided at the connection between the diaphragm 2 and the upper shell 1 and the lower shell 3. The sealing ring has an annular structure that is thin inside and thick outside. The internal stress of the sealing ring is smaller, which further extends the service life of the diaphragm 2. At the same time, its installation sealing performance is high.

[0033] refer to Figure 3 The deformation sensing layer 22 also includes an external interface 6, a signal processing unit 7, and a prompting module 8 located outside the diaphragm. The deformation sensing layer 22, the external interface 6, the signal processing unit 7, and the prompting module 8 are all electrically connected.

[0034] Signal processing unit 7 includes a resistance reading module, a signal preprocessing module, a resistance-deformation mapping module, and an aging judgment module. The working principle of signal processing unit 7 is as follows:

[0035] 1) The resistance reading module includes a constant voltage source and a current collector. The constant voltage source outputs a constant voltage U to the deformation sensing layer, and the current collector collects the real-time current I of the circuit where the deformation sensing layer is located. The real-time resistance value R of the deformation sensing layer is calculated according to formula (1).

[0036] R=U / I (1)

[0037] 2) The signal preprocessing module filters and denoises the acquired resistance signal, using a moving average filtering algorithm to calculate the average resistance value Ra after filtering according to formula (2):

[0038] (2)

[0039] Where R i Let be the resistance value acquired in the i-th sampling, and n be the number of samplings within the sliding window;

[0040] 3) The resistance-deformation mapping module pre-stores the initial resistance-time curve of the diaphragm 2, which reflects the resistance R0 of the diaphragm in its initial state. The mapping function is based on the following principle: After the diaphragm 2, made of polyurethane, ages, the distance between molecules shortens, causing the material to shrink. Therefore, it is difficult to reach the deformation of the initial state. The deformation sensing layer 22 is tightly attached to the upper and lower substrates of the diaphragm 2 without relative sliding. When the polyurethane ages and shrinks, it will drive the deformation sensing layer 22 to shrink synchronously, causing its effective conductive path length L to be passively shortened. Under the premise that the volume of the flexible material remains unchanged, its effective conductive cross-sectional area S will increase accordingly. The deformation rate of the effective conductive path length L after aging deformation relative to the initial state is set as ε. This parameter is used as an indicator of the aging of the diaphragm 2. The resistance value R is calculated according to the resistance law shown in formula (3):

[0041] (3)

[0042] Where ρ is the resistivity, determined by the flexible conductive material itself. The deformation rate ε is based on the real-time resistance value R at the same moment in each cycle. a Calculations were performed. Finally, the relationship between the deformation rate ε and R0 and R0 was derived. a Based on the correlation, the deformation rate ε is calculated according to formula (4):

[0043] (4)

[0044] 4) The aging judgment module presets a deformation rate threshold and sets a trigger signal to the prompt module 8 when the deformation rate ε≥20%.

[0045] The prompt module 8 is either an audio-visual prompter or a host display module. After receiving the trigger signal, the audio-visual prompter will emit flashing lights or a buzzer alarm. After receiving the trigger signal, the host display module will display a text prompt on the screen indicating that the diaphragm 2 needs to be replaced.

[0046] This invention adds a deformation sensing layer to detect diaphragm aging, enabling real-time capture of deformation caused by diaphragm aging. By monitoring resistance changes, it upgrades the traditional timed replacement to a pre-warning replacement mechanism. This avoids material waste and increased costs associated with premature replacement, while also eliminating safety hazards such as diaphragm failure and gas leaks caused by exceeding the recommended lifespan, thus improving the reliability of the safety panel and the safety of clinical use.

[0047] The outer surface of the shell is provided with reinforcing ribs corresponding to the spiral groove 11. The reinforcing ribs include a first reinforcing rib 14 and a second reinforcing rib 44. The outer surface of the upper shell 1 is provided with a first reinforcing rib 14 corresponding to the internal spiral groove, and the outer surface of the lower shell 3 is provided with a second reinforcing rib 44 corresponding to the internal spiral groove. The cross-section of the first reinforcing rib 14 and the second reinforcing rib 44 is semi-circular.

[0048] Vent 12 connects to a sealing joint located on the outside of the housing for connecting to an external gas pipeline; the sealing joint includes a first sealing joint 13 and a second sealing joint 33; the outer side of the upper housing 1 is connected to the first sealing joint 13, and the outer side of the lower housing 3 is connected to the second sealing joint 33. The first sealing joint 13 and the second sealing joint 33 are symmetrically distributed along the radial direction of the housing; the end of the first sealing joint 13 is provided with a first sealing ring groove 15, and the end of the second sealing joint 33 is provided with a second sealing ring groove 25; the first sealing ring groove 15 and the second sealing ring groove 25 are circumferentially extending annular grooves.

[0049] A first cavity 4 is formed between the diaphragm 2 and the upper shell 1, and a second cavity 5 is formed between the diaphragm 2 and the lower shell 3; the first cavity 4 and the second cavity 5 are symmetrically arranged. The first cavity 4 is connected to the balloon catheter through the first sealing joint 13 of the upper shell 1. Helium gas is filled into the first cavity 4 through a control valve to drive the balloon in the aorta. The second cavity 5 is connected to a pressure control device through the second sealing joint 33 of the lower shell 3. The pressure control device controls the pressure of compressed air and vacuum air through a pressure pump, driving the diaphragm 2 to move towards the first cavity 4 or the second cavity 5, thereby achieving balloon inflation or deflation. The diaphragm 2 isolates the power system from the patient, thus ensuring the patient's safety.

[0050] The upper shell 1 and lower shell 3 are integrally molded from modified PC / ABS composite material. The main modified material is high-strength PC and carbon fiber reinforced ABS resin. Nano-inorganic particles (ZnO, TiO2) are used as fillers and have a strong affinity with the resin, which can significantly improve the rigidity and toughness of the material. At the same time, additives (antioxidants, stabilizers, and anti-aging agents) are added to further improve the long-term durability of the material. This modified material can effectively improve the durability of the entire safety disc. The integral molding method is selected by mold-integrated injection molding. Before mold opening and injection molding, Autodesk Moldflow simulation software is used to analyze and optimize the mold structure and injection parameters. The temperature of each section of the injection molding machine barrel is set to 180℃~240℃, the injection pressure is 70~90 MPa, the holding pressure is 50~60 MPa, the holding time is 20~40 s, the mold temperature is 60℃~80℃, and the cooling time is 40~60 s. The upper and lower shells of the safety disc can be obtained by mold injection molding. The upper and lower shells are integrally molded from modified PC / ABS composite materials. The modified composite materials can improve the strength, rigidity and wear resistance of the shells. The first reinforcing rib 14 set on the outer surface of the shell can effectively disperse stress and further enhance the structural strength, thereby improving the reliability, long-term stability and durability of the entire safety disc. At the same time, the integral processing molding process can realize large-scale continuous production.

[0051] The upper housing 1, diaphragm 2, and lower housing 3 are detachably installed and fixed by limit screws, which can prevent the diaphragm 2 from being crushed or leaking air at the connection due to improper installation. When the diaphragm 2 is damaged or its performance deteriorates, the upper housing 1 and lower housing 3 of the safety disc can be retained and the diaphragm 2 can be replaced independently, avoiding the situation where the entire safety disc has to be replaced due to the damage of the diaphragm 2, thus reducing the maintenance and repair costs of the equipment in the later stage.

[0052] Example 2

[0053] The difference in this embodiment is that the thickness of the diaphragm 2 is 0.2 mm to 0.4 mm. This diaphragm 2, which gradually thickens from the middle, has a deformation size that gradually decreases from the middle to the periphery when subjected to actual force.

[0054] The deformation sensing layer 22 is a strip-shaped structure made of flexible conductive material, specifically a silver nanoparticle / polyurethane composite material. This material uses polyurethane as a flexible substrate, with silver nanoparticles dispersed within it to form a three-dimensional conductive network. When deformation occurs, this conductive network changes synchronously, resulting in a sensitive resistance response. The upper substrate 21, the deformation sensing layer 22, and the lower substrate 23 are fixedly connected through a hot-pressing composite process to form an integrated composite structure.

[0055] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A safety disc for a counterpulsation balloon, characterized in that, The system includes a shell and a diaphragm (2). The shell includes an upper shell (1) and a lower shell (3). The upper shell (1) and the lower shell (3) are symmetrical cavities with arc-shaped protrusions. The inner walls of the upper shell (1) and the lower shell (3) are respectively provided with spiral grooves (11). The tops of the upper shell (1) and the lower shell (3) are respectively provided with vent holes (12). The vent holes (12) are connected to a sealing joint located on the outside of the shell for connecting to an external gas pipeline. The spiral grooves (11) are centered on the vent holes (12). The variable curvature airflow channels are spirally distributed around the center; the outer surface of the shell is provided with reinforcing ribs corresponding to the spiral groove (11); a diaphragm (2) is superimposed between the upper shell (1) and the lower shell (3), the diaphragm (2) includes an upper substrate (21) and a lower substrate (23), and a deformation sensing layer (22) for detecting the aging degree of the diaphragm (2) is superimposed between the upper substrate (21) and the lower substrate (23); the upper shell (1), the diaphragm (2) and the lower shell (3) are detachably sealed. The diaphragm (2) is also electrically connected in sequence to an external interface (6), a signal processing unit (7), and an alert module (8); the signal processing unit (7) is used to read the resistance signal of the diaphragm (2) in real time. After the resistance signal is denoised, the deformation rate ε is calculated. When the deformation rate ε is greater than or equal to a preset threshold, the alert module (8) is triggered to alarm; the formula for calculating the deformation rate ε is: In the formula, R0 is the initial resistance of the diaphragm (2), and R a This is the real-time resistance value.

2. The safety disc for the counterpulsation balloon according to claim 1, characterized in that, The spiral groove (11) is an airflow channel with a semi-circular cross-section. The cross-sectional area of ​​the spiral groove (11) gradually decreases from the top of the shell to the edge of the shell. The curvature of the spiral groove (11) gradually decreases from the top of the shell to the edge and the curvature is equal at the same radial position.

3. The safety disc for the counterpulsation balloon according to claim 1, characterized in that, The prompt module (8) issues an alarm by flashing a light, beeping, or displaying the text that the diaphragm (2) needs to be replaced.

4. The safety disc for the counterpulsation balloon according to claim 1, characterized in that, The upper substrate (21) and the lower substrate (23) are both circular polyurethane films that gradually thicken from the center to the periphery; the thickness of the diaphragm (2) ranges from 0.1 mm to 0.5 mm.

5. The safety disc for the counterpulsation balloon according to claim 1, characterized in that, The deformation sensing layer (22) is a strip-shaped flexible conductive material; the flexible conductive material is selected from at least one of graphene / polyurethane, silver nanopowder / polyurethane, and liquid metal / polyurethane composite material; the upper substrate (21), the deformation sensing layer (22) and the lower substrate (23) are integrated into a single structure through a hot-pressing composite process.

6. The safety disc for the counterpulsation balloon according to claim 1, characterized in that, A first cavity (4) is formed between the diaphragm (2) and the upper shell (1), and a second cavity (5) is formed between the diaphragm (2) and the lower shell (3); the first cavity (4) and the second cavity (5) are symmetrically arranged.

7. The safety disc for the counterpulsation balloon according to claim 1, characterized in that, The reinforcing ribs include a first reinforcing rib (14) and a second reinforcing rib (44); the outer surface of the upper shell (1) is provided with a first reinforcing rib (14) corresponding to the internal spiral groove (11), and the outer surface of the lower shell (3) is provided with a second reinforcing rib (44) corresponding to the internal spiral groove (11). The cross-sections of the first reinforcing rib (14) and the second reinforcing rib (44) are semi-circular.

8. The safety disc for the counterpulsation balloon according to claim 1, characterized in that, The sealing joint includes a first sealing joint (13) and a second sealing joint (33); the outer side of the upper housing (1) is connected to the first sealing joint (13), and the outer side of the lower housing (3) is connected to the second sealing joint (33). The first sealing joint (13) and the second sealing joint (33) are symmetrically distributed along the radial direction of the housing. The end of the first sealing joint (13) is provided with a first sealing ring groove (15), and the end of the second sealing joint (33) is provided with a second sealing ring groove (25). The first sealing ring groove (15) and the second sealing ring groove (25) are circumferentially extending annular grooves.

9. The safety disc for the counterpulsation balloon according to claim 1, characterized in that, The shell is integrally molded from modified PC / ABS composite material.

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