Choke valve of puncture outfit

Abstract

The invention relates to the technical field of choke valves, and discloses a puncture outfit choke valve which comprises a choke valve body mounted in a puncture outfit body, the choke valve body comprises a mounting ring mounted with the puncture outfit body, an annular valve is fixedly connected to the inner side wall of the mounting ring, and the annular valve is integrally in a wide-end-down form. Two symmetrical V-shaped first notches are formed in the side face of the end, away from the mounting ring, of the annular valve, a V-shaped second notch is formed in the end, away from the mounting ring, of the annular valve, and a kerf is formed in the position of the second notch. According to the choke valve, the whole annular valve is in the shape with the wide upper portion and the narrow lower portion, the first notch and the second notch which are in the V shape are matched, the inward extrusion compression force of the end, away from the mounting ring, of the annular valve is increased, and the effect that the choke valve body can be closed under the condition that the pressure difference is small is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of air blocking valves, in particular to an air blocking valve for a trocar. Background Art

[0002] The trocar plays a vital role in minimally invasive surgery in precision surgery. It is the key channel for establishing artificial pneumoperitoneum and for surgical instruments to enter the abdominal cavity. As the core component of the trocar, the air-blocking valve ensures the pressure in the abdominal cavity is maintained and the instruments can enter and exit smoothly. The duckbill air-blocking valve can seal by using the pressure difference between the inside and outside of the abdominal cavity. The smaller the pressure difference between the inside and outside of the abdominal cavity, the more difficult it is to seal. The incision of the previous air-blocking valve was slightly open, and the air-blocking valve could not be effectively sealed when the pressure difference was small.

[0003] After searching, the patent publication number CN218792446U discloses a cross-blocking valve for a puncture device, including a valve body installed in the puncture device, a puncture hole for the puncture cone to pass through the valve body, the valve body having a coaxially arranged outer ring body and an inner ring body, the inner ring body is integrally provided with an inner concave portion, a conical portion and a puncture portion, wherein the end with a larger inner diameter of the conical portion is connected to the inner concave portion, the puncture portion is arranged at the end with a smaller inner diameter of the conical portion, the puncture portion has a cross-shaped slit, and an incision arranged at the center of the cross-shaped slit, and the incision is connected to the puncture hole. This invention, by arranging an inner concave portion, a conical portion and a puncture portion on the inner ring body of the air-blocking valve, wherein a cross-shaped slit is arranged on the puncture portion, can make the air-blocking valve have better sealing performance, is not easy to flip up, reduces the risk of air leakage of the air-blocking valve, and when the instrument is inserted or withdrawn, the air-blocking valve has less resistance to the instrument, and the operation is more flexible and convenient.

[0004] The above patent has obvious beneficial effects, but still has the following shortcomings in actual operation:

[0005] In reality, the internal and external pressure difference is generally below 1.86kpa, and some special surgeries are even around 1.0kpa (the elderly and young children cannot tolerate high abdominal pressure or special surgeries, such as thyroid surgery). There are many types of air-blocking valve structures at present, such as straight-line and cross-shaped air-blocking valves (as shown in the above-mentioned comparative documents). The above-mentioned types of air-blocking valves can be sealed under high pressure difference conditions, for example, they can be well sealed and leak-free under 4kpa pressure, but they will leak under the clinical pressure of 1.86kpa and cannot be closed. There are many reasons for this. When a straight-line or cross-shaped notch is cut in a type of air-blocking valve, the incision cannot be closed automatically (the incision is slightly open). This type of air-blocking valve requires a certain amount of pressure to close. If the elasticity of the air-blocking valve in the outward opening direction is large, the air-blocking valve cannot be closed when the pressure difference is small. Therefore, in clinical operations with a small pressure difference (about 1.0 kpa pressure), it will be difficult to close the air-blocking valve in the puncture device or the sealing effect will be poor when closed. Therefore, there is an urgent need in the art to improve the air-blocking valve of the puncture device to solve the defects of the prior art. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a trocar blocking valve, which can achieve the effect that the blocking valve body can be closed even when the pressure difference is small, and can even be effectively closed by the internal pressure of the blocking valve structure itself when there is no pressure difference.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a trocar blocking valve, comprising a blocking valve body installed in a trocar body, the blocking valve body comprising a mounting ring mounted on the trocar body, an annular valve fixedly connected to the inner side wall of the mounting ring, the annular valve being generally wide at the bottom and narrow at the top, two symmetrical and V-shaped first incisions being arranged on the side surface of one end of the annular valve away from the mounting ring, a V-shaped second incision being opened at one end of the annular valve away from the mounting ring, and a slit being opened at the position of the second incision.

[0008] Preferably, a reinforcing rib is provided at the first incision position, and the cross-section of the reinforcing rib is trapezoidal.

[0009] Preferably, the slope angle of the first incision is between 90° and 140°.

[0010] Preferably, the slope angle of the second cutout is between 100° and 170°.

[0011] Preferably, the difference between the outer diameter of the end of the annular valve close to the mounting ring and the outer diameter of the annular valve away from the mounting ring is between 1mm and 6mm, and the outer diameter of the end of the annular valve close to the mounting ring is larger than the outer diameter of the end of the annular valve away from the mounting ring.

[0012] Preferably, the width of the reinforcing rib at one end close to the second incision is between 2 mm and 12 mm, the thickness of the reinforcing rib at one end close to the second incision is between 0.5 mm and 3 mm, the width of the reinforcing rib at one end close to the mounting ring is between 1 mm and 10 mm, the thickness of the reinforcing rib at one end close to the mounting ring is between 0 mm and 1.5 mm, and the width and thickness of the reinforcing rib increase in an arithmetic progression from the end close to the mounting ring to the end away from the mounting ring.

[0013] Preferably, the cross section and the reinforcing ribs of the first incision are both arc-shaped.

[0014] In view of the deficiencies of the prior art, the present invention provides a trocar blocking valve, which overcomes the deficiencies of the prior art. The beneficial effects of the present invention are:

[0015] 1. In the present invention, the annular valve is generally wide at the top and narrow at the bottom, and cooperates with the first and second V-shaped cutouts to increase the compression force of the annular valve away from the mounting ring, thereby achieving the effect that the air-blocking valve body can be closed even when the pressure difference is small or zero.

[0016] 2. In the present invention, reinforcing ribs are provided, the cross-section of the reinforcing ribs is trapezoidal, and the reinforcing ribs increase the closing force of the slit position, thereby improving the sealing performance of the annular valve.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0019] Figure 1 It is a schematic structural diagram of the overall cross-section of the trocar body installed with the air blocking valve body in the present invention;

[0020] Figure 2 It is a structural schematic diagram of the three-dimensional appearance of the air blocking valve body in the present invention;

[0021] Figure 3 A schematic structural diagram of the three-dimensional appearance of the air blocking valve body from another perspective of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the two-dimensional appearance of the air blocking valve body in the present invention;

[0023] Figure 5 It is a structural schematic diagram of the two-dimensional appearance of the air blocking valve body from another perspective in the present invention.

[0024] In the figure: 1. trocar body; 2. air blocking valve body; 3. mounting ring; 4. annular valve; 5. first incision; 6. second incision; 7. slit; 8. reinforcing rib. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] See also Figure 1-Figure 5 A trocar blocking valve comprises a trocar blocking valve body 2 installed in a trocar body 1, the trocar blocking valve body 2 comprises a mounting ring 3 mounted on the trocar body 1, an annular valve 4 is fixedly connected to the inner wall of the mounting ring 3, the annular valve 4 is generally wide at the bottom and narrow at the top, two symmetrical and V-shaped first incisions 5 are arranged on the side surface of one end of the annular valve 4 away from the mounting ring 3, a V-shaped second incision 6 is opened at the end of the annular valve 4 away from the mounting ring 3, and a slit 7 is opened at the position of the second incision 6.

[0027] Specifically, the material of the above-mentioned air-blocking valve body 2 includes but is not limited to silicone rubber or natural synthetic rubber. Silicone rubber or natural synthetic rubber has good ductility and can improve the sealing performance of the air-blocking valve body 2. The annular valve 4 is generally wide at the top and narrow at the bottom. The diameter of the end of the annular valve 4 away from the mounting ring 3 is smaller than the diameter of the end of the annular valve 4 close to the mounting ring 3, and cooperates with the first V-shaped incision 5 and the second incision 6 to increase the compression force of the end of the annular valve 4 away from the mounting ring 3, so as to achieve the effect that the air-blocking valve body 2 can be closed even when the pressure difference is small. The mounting ring 3 is configured to be fixedly installed in the puncture device body 1.

[0028] As a technical optimization solution of the present invention, a reinforcing rib 8 is provided at the position of the first incision 5 . The cross section of the reinforcing rib 8 is trapezoidal. The reinforcing rib 8 increases the closing force at the position of the incision 7 , thereby improving the sealing performance of the annular valve 4 .

[0029] As a technical optimization solution of the present invention, the slope angle of the first incision 5 is between 90° and 140°, and the slope angle of the second incision 6 is between 100° and 170°. A smaller or larger slope angle of the first incision 5 or the second incision 6 will result in a reduction in the extrusion force, so the slope angle of the first incision 5 is set between 90° and 140°, and the slope angle of the second incision 6 is set between 100° and 170°.

[0030] As a technical optimization solution of the present invention, the difference between the outer diameter of one end of the annular valve 4 close to the mounting ring 3 and the outer diameter of the annular valve 4 away from the mounting ring 3 is between 1 mm and 6 mm, and the outer diameter of one end of the annular valve 4 close to the mounting ring 3 is larger than the outer diameter of one end of the annular valve 4 away from the mounting ring 3. If the difference in diameters at both ends of the annular valve 4 is too large, the sealing performance will be reduced.

[0031] As a technical optimization scheme of the present invention, the width of the end of the reinforcing rib 8 close to the second incision 6 is between 2mm and 12mm, the thickness of the end of the reinforcing rib 8 close to the second incision 6 is between 0.5mm and 3mm, the width of the end of the reinforcing rib 8 close to the mounting ring 3 is between 1mm and 10mm, the thickness of the end of the reinforcing rib 8 close to the mounting ring 3 is between 0mm and 1.5mm, the width and thickness of the reinforcing rib 8 from the end close to the mounting ring 3 to the end away from the mounting ring 3 increase in an arithmetic progression, the cross-section of the first incision 5 and the reinforcing rib 8 are both arc-shaped, and the gradually widened and thickened reinforcing rib 8 ensures the squeezing force on the slit 7, so that the slit 7 position can be completely closed, thereby improving the airtightness of the annular valve 4.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A trocar blocking valve, comprising a trocar blocking valve body (2) installed in a trocar body (1), characterized in that: The air blocking valve body (2) comprises a mounting ring (3) mounted on the puncture device body (1); an annular valve (4) is fixedly connected to the inner wall of the mounting ring (3); the annular valve (4) is generally wide at the bottom and narrow at the top; two symmetrical and V-shaped first incisions (5) are provided on the side surface of one end of the annular valve (4) away from the mounting ring (3); a V-shaped second incision (6) is provided on the end of the annular valve (4) away from the mounting ring (3); and a slit (7) is provided at the position of the second incision (6).

2. A trocar blocking valve according to claim 1, characterized in that: A reinforcing rib (8) is provided at the position of the first incision (5), and the cross section of the reinforcing rib (8) is trapezoidal.

3. A trocar blocking valve according to claim 1, characterized in that: The slope angle of the first incision (5) is between 90° and 140°.

4. A trocar blocking valve according to claim 1, characterized in that: The slope angle of the second incision (6) is between 100° and 170°.

5. A trocar blocking valve according to claim 1, characterized in that: The difference between the outer diameter of the end of the annular valve (4) close to the mounting ring (3) and the outer diameter of the end of the annular valve (4) away from the mounting ring (3) is between 1 mm and 6 mm, and the outer diameter of the end of the annular valve (4) close to the mounting ring (3) is greater than the outer diameter of the end of the annular valve (4) away from the mounting ring (3).

6. A trocar blocking valve according to claim 2, characterized in that: The width of the reinforcing rib (8) at one end close to the second notch (6) is between 2 mm and 12 mm, the thickness of the reinforcing rib (8) at one end close to the second notch (6) is between 0.5 mm and 3 mm, the width of the reinforcing rib (8) at one end close to the mounting ring (3) is between 1 mm and 10 mm, the thickness of the reinforcing rib (8) at one end close to the mounting ring (3) is between 0 mm and 1.5 mm, and the width and thickness of the reinforcing rib (8) increase in an arithmetic progression from the end close to the mounting ring (3) to the end away from the mounting ring (3).

7. A trocar blocking valve according to claim 2, characterized in that: The cross section of the first incision (5) and the reinforcing rib (8) are both in an arc shape.

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