A choke valve

Abstract

The utility model discloses a kind of air resistance valves, including the valve body installed in puncture device, the valve body is equipped with the puncture hole that can be supplied to puncture cone and pass through, the valve body includes sequentially connected and coaxially arranged mounting ring, connecting sleeve and puncture end, the puncture end is cross-shaped structure, the connecting sleeve includes fixed area and folding area, the longitudinal section of fixed area is inverted isosceles trapezoidal structure and its top edge is connected and arranged on the cross short side of puncture end, folding gap is arranged between two adjacent groups of fixed area, the longitudinal section of folding gap is isosceles triangular structure, the folding area includes two groups of folding sheet in folding gap and left and right connection and symmetrically arranged, the folding line of two folding sheets is formed by the triangular top end point of folding gap and the right angle end point of cross intersection of puncture end, the folding line, the side of fixed area, the cross long side of puncture end form the folding sheet and enclose.

Description

Technical Field

[0001] This utility model relates to the field of valve body technology, specifically to an air-blocking valve. Background Technology

[0002] In minimally invasive surgery, the trocar is a crucial instrument for establishing a passage between the body cavity and the outside world. To maintain pneumoperitoneum pressure within the body cavity during the insertion and removal of surgical instruments, the trocar typically contains a gas-blocking valve (such as a duckbill valve or umbrella valve). Existing gas-blocking valves generally have several shortcomings: First, the opening mechanism of the flaps in traditional duckbill valves may lead to poor instrument containment during the passage of the trocar or instrument, posing a risk of seal failure, especially when the instrument is misaligned; second, the valve body may deform unevenly during instrument insertion, resulting in excessive operating force (insertion force), increasing the surgeon's workload and potentially affecting the sensitivity of instrument manipulation. Utility Model Content

[0003] The purpose of this invention is to provide a gas-blocking valve that enables smooth puncture and provides a reliable seal to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A gas-blocking valve includes a valve body installed inside a puncture device. The valve body has a puncture hole through which a puncture cone can pass. The valve body includes a mounting ring, a connecting sleeve, and a puncture end that are connected sequentially and coaxially. The puncture end has a cross-shaped structure. The connecting sleeve includes a fixing area and a folding area. The fixing area includes four sets arranged circumferentially. The longitudinal section of the fixing area has an inverted isosceles trapezoidal structure, and its top edge is connected to the short side of the cross at the puncture end. A folding notch is provided between two adjacent sets of the fixing areas. The longitudinal section of the folding notch has an isosceles triangular structure. The folding area includes two sets of folding pieces located within the folding notch and connected symmetrically on both sides. The right-angle endpoint of the intersection of the triangle of the folding notch and the cross at the puncture end forms the folding centerline of the two folding pieces. The folding centerline, the side of the fixing area, and the long side of the cross at the puncture end enclose the folding piece. A cross-shaped slit is provided on the puncture end. A cut communicating with the puncture hole is formed at the center of the cross-shaped slit.

[0006] Preferably, in its natural state, the cross-cut is in a closed state, and the two sets of folding pieces on the same folding area are folded inward along the folding center line and cooperate to form a V-shaped folding angle facing outward. When the puncture cone penetrates the puncture hole, the folding pieces are squeezed by the puncture cone and unfold to enlarge the puncture hole, so as to allow the puncture cone to pass through and cooperate with the cross-cut to fit tightly against the side wall of the puncture cone, thereby maintaining an airtight seal.

[0007] Preferably, the thickness of the folded piece gradually decreases from the end near the mounting ring to the end away from the mounting ring.

[0008] Preferably, the mounting ring is provided with at least one positioning notch in the circumferential direction for the positioning block of the inner wall of the puncture device to engage and cooperate to achieve circumferential positioning of the valve body.

[0009] Preferably, the bottom surface of the mounting ring has an annular groove coaxially arranged with the mounting ring, allowing the annular locking block on the inner wall of the puncture device to engage and cooperate to achieve the installation and fixation of the valve body.

[0010] Preferably, the inner sidewall of the mounting ring is coaxially provided with an annular sealing sleeve that fits against the outer wall of the puncture cone to form a sealing fit. The height of the upper and lower surfaces of the annular sealing sleeve is higher than the height of the upper and lower surfaces of the mounting ring, and the bottom edge of the annular sealing sleeve is connected to the top edge of the connecting sleeve.

[0011] Preferably, the inner diameter of the annular sealing sleeve gradually decreases from top to bottom.

[0012] Preferably, the base angle of the inverted isosceles trapezoidal structure of the fixed area is 45 degrees to 60 degrees.

[0013] Preferably, the apex angle of the isosceles triangle structure of the folded notch is 30 to 45 degrees.

[0014] Preferably, the valve body is integrally molded from a medical-grade elastic material, which is silicone or rubber.

[0015] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0016] 1. This utility model provides an air-blocking valve. Through the fixed area and folding area specifically arranged in the connecting sleeve, when the puncture cone penetrates, the folding piece can smoothly unfold outward along the preset folding center line, so that the cross-cut can be tightly fitted to the side wall of the puncture cone, forming an effective dynamic seal, which greatly reduces the risk of air leakage. Even when the puncture cone has slight shaking or offset, the flexible folding piece can also adaptively adjust to maintain a reliable seal.

[0017] 2. This utility model provides a gas-blocking valve. In its natural state, two sets of folding pieces in the same folding area fold inward along the folding center line to form an outward V-shaped folding angle. Together with the closed cross-cutting slit, they ensure the complete sealing of the valve body in the absence of instruments. When the puncture cone is removed, the entire valve body can quickly and accurately return to the initial closed state, effectively preventing postoperative gas leakage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model from a frontal view.

[0019] Figure 2 This is a top-view structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model from a downward viewing angle. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] It should be noted that in this utility model, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element of this utility model must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Example

[0024] Please refer to Figures 1 to 3 As shown, this utility model discloses an air-blocking valve, installed in the channel of a trocar (not shown in the figure), used to maintain an airtight seal during the insertion and withdrawal of the trocar or surgical instrument. The valve body is integrally molded from a medical-grade elastic material, such as silicone or rubber, and has good biocompatibility and elasticity. The valve body includes a mounting ring 1, a connecting sleeve 2, and a trocar end 3, which are connected sequentially and coaxially.

[0025] The mounting ring 1 is used to fix the entire valve body inside the trocar. Its outer edge has two symmetrical positioning notches 11, which engage with corresponding positioning blocks (not shown in the figure) on the inner wall of the trocar to achieve circumferential positioning of the valve body and prevent rotation during use. The bottom surface of the mounting ring 1 (i.e., the side facing the inside of the trocar) has an annular groove 12 coaxial with the mounting ring 1, which allows an annular locking block (not shown in the figure) on the inner wall of the trocar to engage, thereby firmly fixing the valve body axially inside the trocar.

[0026] The connecting sleeve 2 is attached to the front of the mounting ring 1. It includes a fixing area 21 and a folding area 22. The fixing area 21 has four sets evenly arranged circumferentially, and its longitudinal section is an inverted isosceles trapezoidal structure. The base angle of the isosceles trapezoid is 45 degrees to 60 degrees, preferably 55 degrees in this embodiment, providing a stable support base for the connecting sleeve 2. A folding notch 23 is provided between two adjacent sets of fixing areas 21. The longitudinal section of the folding notch 23 is an isosceles triangle structure, and its apex angle is 30 degrees to 45 degrees, preferably 40 degrees in this embodiment.

[0027] The puncture end 3 is connected to the front of the connecting sleeve 2. Its overall structure is cross-shaped, which is composed of two long sides 31 and two short sides 32. The top edge of the fixing area 21 (i.e. the short side of the isosceles trapezoid) is connected to the short side 32 of the cross of the puncture end 3.

[0028] The folding area 22 includes two sets of folded pieces 221 located within the folding notch 23 and symmetrically arranged side-by-side. The line connecting the vertex endpoint (denoted as point P1) of the isosceles triangle of the folding notch 23 and the right-angle endpoint (denoted as point P2) of the cross intersection of the puncture end 3 forms the folding center line 222 of the folded piece 221. This folding center line 222, the side of the fixing area 21, and the long side 31 of the cross of the puncture end 3 together form an approximately triangular folded piece 221. The thickness of the folded piece 221 gradually decreases from one end of the mounting ring 1 towards the end away from the mounting ring 1 (i.e., towards the puncture direction), thereby optimizing stress and deformation.

[0029] A cross-shaped slit 33 is provided in the central region of the puncture end 3, and a cut 34 is formed at the center of the cross-shaped slit 33, which communicates with the puncture hole 13 in the center of the valve body. In the natural state (i.e., when no instrument passes through), the cross-shaped slit 33 is in a tightly closed state under the elasticity of the material, effectively sealing the puncture hole 13. At the same time, two sets of folding pieces 221 in the same folding area 22 fold inward along the folding center line 222 towards the inside of the valve body, and cooperate to form a V-shaped folding angle facing outward, which together ensures the initial seal of the air-blocking valve in the natural state.

[0030] An annular sealing sleeve 14 is coaxially provided on the inner side wall of the mounting ring 1 and fits against the outer wall of the puncture cone to form a sealing fit. The height of the upper and lower surfaces of the annular sealing sleeve 14 is higher than that of the upper and lower surfaces of the mounting ring 1, and the bottom edge of the annular sealing sleeve 14 is connected to the top edge of the connecting sleeve 2. The inner diameter of the annular sealing sleeve 14 gradually decreases from top to bottom.

[0031] The working principle of this utility model is as follows:

[0032] As the puncture cone penetrates the puncture hole 13, its tip first contacts and compresses the closed cross-shaped slit 33, forcing the valves of the cross-shaped slit 33 to open. As the puncture cone continues to penetrate, its sidewalls exert radial outward compressive force on the unfolded folded flap 221. Due to the gradually varying thickness design and the pre-set folding centerline 222 of the folded flap 221, it can smoothly and with low resistance unfold outward, expanding the entrance area of ​​the puncture hole 13 and allowing the puncture cone to pass through smoothly. During this process, on the one hand, the four valves of the cross-shaped slit 33 are tightly attached to the sidewall of the puncture cone under elastic action; on the other hand, the annular sealing protrusion 14 is also tightly attached to the outer wall of the puncture cone, forming a multiple seal. The unfolding movement of the folded flap 221 and the synergistic effect of the cross-shaped slit 33 ensure a dynamic and reliable airtight seal between the puncture cone and the valve body.

[0033] When the puncture cone is removed, the valve body loses external pressure, and the elasticity of its medical silicone material will drive each component to reset. The folding piece 221 folds inward again along the folding center line 222, restoring to an outward V-shaped angle. The valve of the cross-cut 33 also quickly rebounds to a completely closed state, resealing the puncture hole 13 and effectively maintaining the pneumoperitoneum pressure in the body cavity.

[0034] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A gas-blocking valve, comprising a valve body installed within a puncture device, characterized in that: The valve body has a puncture hole through which a puncture cone can pass. The valve body includes a mounting ring, a connecting sleeve, and a puncture end that are connected sequentially and coaxially. The puncture end has a cross-shaped structure. The connecting sleeve includes a fixing area and a folding area. The fixing area includes four sets arranged circumferentially. The longitudinal section of the fixing area is an inverted isosceles trapezoid, and its top edge is connected to the short side of the cross at the puncture end. A folding notch is provided between two adjacent sets of fixing areas. The longitudinal section of the folding notch is an isosceles triangle. The folding area includes two sets of folding pieces located within the folding notch and connected symmetrically on both sides. The right-angle endpoint of the intersection of the triangle of the folding notch and the cross at the puncture end forms the folding center line of the two folding pieces. The folding center line, the side of the fixing area, and the long side of the cross at the puncture end enclose the folding piece. A cross-shaped slit is provided on the puncture end. A cut communicating with the puncture hole is formed at the center of the cross-shaped slit.

2. The air-blocking valve as described in claim 1, characterized in that: In its natural state, the cross-cut is closed, and the two sets of folding pieces on the same folding area are folded inward along the folding center line and cooperate to form a V-shaped folding angle facing outward. When the puncture cone penetrates the puncture hole, the folding pieces are squeezed by the puncture cone and unfold to enlarge the puncture hole, so as to allow the puncture cone to pass through and cooperate with the cross-cut to fit tightly against the side wall of the puncture cone, thereby maintaining an airtight seal.

3. The air-blocking valve as described in claim 1, characterized in that: The thickness of the folded piece gradually decreases from the end closer to the mounting ring to the end farther away from the mounting ring.

4. The air-blocking valve as described in claim 1, characterized in that: The mounting ring has at least one positioning notch in its circumferential direction for the positioning block on the inner wall of the puncture device to engage and achieve circumferential positioning of the valve body.

5. The air-blocking valve as described in claim 1, characterized in that: The bottom surface of the mounting ring has an annular groove coaxial with the mounting ring, which allows the annular locking block on the inner wall of the puncture device to engage and fix the valve body.

6. The air-blocking valve as described in claim 1, characterized in that: The inner sidewall of the mounting ring is coaxially provided with an annular sealing sleeve that fits against the outer wall of the puncture cone to form a sealing fit. The height of the upper and lower surfaces of the annular sealing sleeve is higher than that of the upper and lower surfaces of the mounting ring, and the bottom edge of the annular sealing sleeve is connected to the top edge of the connecting sleeve.

7. The air-blocking valve as described in claim 6, characterized in that: The inner diameter of the annular sealing sleeve gradually decreases from top to bottom.

8. The air-blocking valve as described in claim 1, characterized in that: The base angle of the inverted isosceles trapezoidal structure in the fixed area is 45 degrees to 60 degrees.

9. The air-blocking valve as described in claim 1, characterized in that: The apex angle of the isosceles triangle structure of the folded notch is between 30 and 45 degrees.

10. A vent valve as described in claim 1, characterized in that: The valve body is integrally molded from a medical-grade elastic material, which is either silicone or rubber.

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