CN117297498A - Liquid blowout preventer and endoscope with same - Google Patents

Abstract

The application relates to a liquid blowout preventer and an endoscope with the same, wherein the liquid blowout preventer comprises a pipe orifice valve; the pipe orifice valve is provided with a circulation cavity, the inner wall surface of the circulation cavity is provided with a blowout preventer, and the blowout preventer is provided with a channel penetrating through the circulation cavity; the inner wall surface of the channel is provided with a flexible shielding body, the flexible shielding body is provided with a through hole, and the through hole is used for passing through an auxiliary medical instrument. On the one hand, the flexible shielding body can prevent liquid from flowing out of the channel of the blowout preventer, so that the blowout preventer has better blowout preventing effect; on the other hand, when auxiliary medical instruments extend from the inlet end of the pipe orifice valve, the flexible shielding body is of a flexible structure, so that abrasion to the auxiliary medical instruments can be reduced.

Description

Liquid blowout preventer and endoscope with same

Technical Field

The application relates to the technical field of medical instruments, in particular to a liquid blowout preventer and an endoscope with the same.

Background

Endoscopes are detection instruments that integrate traditional optics, ergonomics, precision machinery, modern electronics, mathematics, software, and the like. The endoscope has an image sensor, optical lens, light source illumination, mechanical means, etc., which can be passed orally into the stomach or through other natural tunnels into the body.

Endoscopic systems typically comprise three major parts: an insertion part, a connection part and an operation part. When a doctor uses an endoscope for diagnosis and treatment, a relevant auxiliary medical instrument needs to be inserted into an instrument passage opening of an operation part. However, when the auxiliary medical instrument performs an operation through the instrument channel, tissue waste liquid in the patient body is easy to be sprayed out from the instrument channel opening.

Disclosure of Invention

Accordingly, it is necessary to provide a liquid blowout preventer and an endoscope having the same, which are capable of solving the problem that tissue waste liquid in a patient is easily ejected from an instrument passage port.

In a first aspect, embodiments of the present application provide a liquid blowout preventer comprising a nozzle valve;

the pipe orifice valve is provided with a circulation cavity, the inner wall surface of the circulation cavity is provided with a blowout preventer, and the blowout preventer is provided with a channel penetrating through the circulation cavity;

the inner wall surface of the channel is provided with a flexible shielding body, the flexible shielding body is provided with a through hole, and the through hole is used for passing through an auxiliary medical instrument.

According to the liquid blowout preventer, the flexible shielding body is arranged in the channel of the blowout preventer, so that on one hand, the flexible shielding body can prevent liquid from being blocked in the channel and from flowing out of the channel of the blowout preventer, and the blowout preventer of the liquid blowout preventer is better in blowout preventer; on the other hand, when auxiliary medical instruments pass through the inlet end of the pipe orifice valve, the flexible shielding body is of a flexible structure, so that abrasion of the auxiliary medical instruments can be reduced.

In one embodiment, the through hole is located at the center of the flexible shielding body, and the flexible shielding body is annular;

the flexible shielding body is provided with a plurality of incisions, and the incisions are radially distributed along the center of the flexible shielding body.

In one embodiment, the flexible barrier comprises a plurality of sub-barriers, the through-hole extending through the plurality of sub-barriers along the center of the channel;

the plurality of sub-shielding bodies are arranged radially along the center of the channel, and gaps are reserved between the adjacent sub-shielding bodies; or (b)

The plurality of sub-shielding bodies are spirally arranged in a step shape along the center of the channel.

In one embodiment, a blowout preventing surface is arranged on one side of the blowout preventing body, which is close to the outlet end of the pipe orifice valve; wherein the blowout preventing surface is a cambered surface.

In one embodiment, the orifice valve comprises a plurality of cavity sections connected in sequence, wherein the through-flow cross section of the cavity section close to the outlet end of the orifice valve is larger than the through-flow cross section of the cavity section far away from the outlet end of the orifice valve in two adjacent cavity sections.

In one embodiment, the orifice valve comprises a first chamber section, a second chamber section and a third chamber section which are connected in sequence; the through-flow cross section of the first cavity section is larger than that of the second cavity section, and the through-flow cross section of the second cavity section is larger than that of the third cavity section;

a first boss is arranged between the second cavity section and the third cavity section, and the blowout preventer is connected to the first boss.

In one embodiment, the liquid blowout preventer comprises a pipe clamp, and the outlet end of the pipe orifice valve is sleeved at the inlet end of the pipe clamp;

the pliers pipe comprises a plurality of pipe sections which are connected in sequence, wherein the through flow section of each two adjacent pipe sections, which is far away from the pipe orifice valve, is larger than that of the pipe section, which is close to the pipe orifice valve.

In one embodiment, the forceps pipe comprises a first pipe section, a second pipe section and a third pipe section which are sequentially connected, wherein the first pipe section is positioned on one side of the second pipe section, which is far away from the pipe orifice valve, and the third pipe section is positioned on one side of the second pipe section, which is close to the pipe orifice valve; the through-flow cross section of the first pipe section is larger than that of the second pipe section, and the through-flow cross section of the second pipe section is larger than that of the third pipe section;

a second boss and a blowout prevention cavity section which are sequentially connected are arranged on one side, close to the pipe orifice valve, of the third pipe section, and the through flow section of the blowout prevention cavity section is larger than that of the third pipe section; the blowout prevention cavity section and the second boss are located in the first cavity section.

In one embodiment, a groove is formed in the outer wall of the forceps channel pipe, and a protrusion which is embedded with the groove is formed in the inner wall of the pipe orifice valve;

and/or the liquid blowout preventer further comprises a bonnet mounted to the inlet end of the nozzle valve.

In a second aspect, embodiments of the present application provide an endoscope comprising the liquid blowout preventer of the first aspect described above.

According to the endoscope, the flexible shielding body is arranged in the channel of the blowout preventer, so that on one hand, the flexible shielding body can prevent liquid from flowing out of the channel of the blowout preventer, and the using experience of the endoscope is improved; on the other hand, when auxiliary medical instruments extend from the inlet end of the pipe orifice valve, the flexible shielding body is of a flexible structure, so that abrasion of the auxiliary medical instruments can be reduced.

Drawings

In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings required for the descriptions of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic structural view of a nozzle valve according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a flexible shielding body according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a flexible shielding body according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a flexible shielding body according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural view of a nozzle valve according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of a forceps tube according to an embodiment of the present disclosure;

FIG. 7 is a schematic view of the assembly of the orifice valve of FIG. 1 and the clamp tube of FIG. 6;

FIG. 8 is a schematic view of a spout valve and cap in an assembled state according to an embodiment of the present application;

FIG. 9 is a cross-sectional view of FIG. 8;

fig. 10 is a bottom view of fig. 8.

Reference numerals illustrate:

10-a liquid blowout preventer; 100-orifice valve; 110 a-an outlet end; 110 b-an inlet end; 110-a flow-through chamber; 120-blowout preventer; 121-channel; 122-blowout prevention face; 130-a flexible shutter; 131-through holes; 132-incision; 133-sub-occlusion; 140-cavity section; 141-a first chamber section; 142-a second chamber section; 143-a third chamber section; 150-a first boss; 160-bulge; 200-forceps channel tube; 210 a-an outlet end; 210 b-an inlet end; 210-pipe sections; 211-a first pipe section; 212-a second pipe section; 213-a third pipe section; 220-a second boss; 230-blowout prevention chamber section; 240-grooves; 300-valve cap; 310-connection handle.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Also, in this specification, the term "and/or" includes any and all combinations of the associated listed items.

As described in the background art, when the auxiliary medical instrument is operated through the instrument passage opening in the operation portion, the tissue waste liquid in the patient body is easily ejected from the instrument passage opening.

In order to solve the above problems, embodiments of the present application provide a liquid blowout preventer and an endoscope having the same, which can prevent tissue waste liquid in a patient from being ejected from an instrument passage port.

In a first aspect, embodiments of the present application provide a liquid blowout preventer that includes a nozzle valve. Referring to fig. 1, the orifice valve 100 is provided with a flow chamber 110 penetrating in the axial direction (direction a in fig. 1) of the orifice valve 100, a blowout preventer 120 is provided on the inner wall surface of the flow chamber 110, a passage 121 penetrating the blowout preventer 120 is provided on the blowout preventer 120, and the passage 121 communicates with the flow chamber 110.

Wherein, the inner wall surface of the channel 121 is provided with a flexible shielding body 130, the flexible shielding body 130 is provided with a through hole 131, and the through hole 131 is used for passing through an auxiliary medical instrument. The flexible shielding body 130 can be made of rubber, acrylonitrile-butadiene-styrene (Acrylonitrile Butadiene Styrene plastic, ABS) plastic and other materials, so that the flexible shielding body 130 can not only prevent liquid from flowing out, but also reduce abrasion of auxiliary medical instruments when the auxiliary medical instruments pass through.

It will be appreciated that by providing the blowout preventer 120 within the flow-through chamber 110, the blowout preventer 120 may block a portion of the liquid from flowing from the flow-through chamber 110 into the channel 121. According to the liquid blowout preventer provided by the embodiment of the invention, the flexible shielding body 130 is arranged in the channel 121 of the blowout preventer 120, on one hand, the flexible shielding body 130 can further block liquid in the channel 121 to prevent the liquid from flowing out of the channel 121 of the blowout preventer 120, so that the blowout preventer has better blowout preventing effect; on the other hand, when the auxiliary medical instrument passes through the inlet end 110b of the spout valve 100, the flexible shield 130 has a flexible structure, and abrasion of the auxiliary medical instrument can be reduced.

In the embodiment of the present application, the "inlet end 110b" of the orifice valve 100 refers to an end of the auxiliary medical instrument entering the orifice valve 100 from the outside, and the "outlet end 110a" of the orifice valve 100 refers to an end of the auxiliary medical instrument entering the forceps channel tube 200 from the orifice valve 100. It will be appreciated that as the liquid flows out, the liquid flows from the "outlet end 110a" to the "inlet end 110 b".

In one embodiment, as shown in fig. 2, the through hole 131 is located at the center of the flexible shielding body 130, and the flexible shielding body 130 is circular. The flexible shielding body 130 is provided with a plurality of incisions 132, and the incisions 132 are radially arranged along the center of the flexible shielding body 130. Through setting up the through-hole 131 in the center of flexible shielding body 130, can make supplementary medical instrument pass through from the center of passageway 121, avoid supplementary medical instrument too to be close to the wall of passageway 121, reduce the passageway degree of difficulty of supplementary medical instrument. Through set up incision 132 on flexible shielding body 130, make flexible shielding body 130 better to the blocking effect of liquid on the one hand, improve blowout prevention ability, on the other hand, when supplementary medical instrument passes through from the center of flexible shielding body 130, flexible shielding body 130 of being convenient for takes place deformation to reduce the passageway degree of difficulty of supplementary medical instrument.

It will be appreciated that the diameter of the through hole 131 may be set according to the size of the auxiliary medical instrument and the deformable amount of the flexible shielding body 130 itself. For example, if the auxiliary medical instrument is large, the diameter of the through hole 131 may be set large. If the flexible shielding body 130 has larger deformation, the diameter of the through hole 131 can be set smaller, so that when the auxiliary medical instrument passes through, the flexible shielding body 130 can be subjected to larger deformation to compensate the diameter of the through hole 131, and the auxiliary medical instrument can pass through conveniently.

In another embodiment, the through hole 131 may not be located in the center of the flexible shielding body 130, and the location of the through hole 131 is not limited in the embodiments of the present application.

In one embodiment, referring to FIG. 3, flexible shield 130 includes a plurality of sub-shields 133, with through-holes 131 extending through the plurality of sub-shields 133 along the center of channel 121.

The plurality of sub-shields 133 may be arranged in two ways:

in the first arrangement, as shown in fig. 3, a plurality of sub-shields 133 are arranged radially along the center of the channel 121 with a gap L between adjacent sub-shields 133. In this arrangement, a certain gap is formed between the adjacent sub-shielding bodies 133, and when the auxiliary medical instrument passes through, on one hand, the side edges of the adjacent sub-shielding bodies 133 are close to each other, so that the gap is reduced, and the outflow of liquid is blocked; on the other hand, each sub-shielding body 133 deforms, and adjacent sub-shielding bodies 133 are not easy to interfere with each other, so that the deformation effect of each sub-shielding body 133 is better, and the passing difficulty of the auxiliary medical instrument is reduced.

It will be appreciated that multiple layers of flexible shutters 130 may also be provided, each layer of flexible shutters 130 being staggered with respect to the adjacent layer of flexible shutters 130. For example: two layers of flexible shutters 130 are arranged at intervals along the axial direction of the passage 121, wherein the gaps of the first layer of flexible shutters 130 are opposite to the sub-shutters 133 of the second layer of flexible shutters 130, and the sub-shutters 133 of the first layer of flexible shutters 130 are opposite to the gaps of the second layer of flexible shutters 130. In this way, the blowout prevention performance of the liquid blowout prevention device can be further improved.

In the second arrangement, as shown with reference to fig. 4 and 5, the plurality of sub-shields 133 are arranged in a stepwise spiral along the center of the channel 121. In this arrangement, it can be understood that: in the axial direction of the spout valve 100, each sub-shutter 133 is located at a different height, and only one sub-shutter 133 is located on the horizontal plane of each sub-shutter 133. Thus, when the auxiliary medical instrument sequentially passes through each sub-shielding body 133 along the axial direction of the pipe orifice valve 100, only one sub-shielding body 133 is arranged on the horizontal plane where the sub-shielding body 133 is positioned, so that the passing area of the auxiliary medical instrument is larger, and the passing difficulty of the auxiliary medical instrument is reduced.

It should be noted that, the plurality of sub-shields 133 are spirally arranged in a step shape along the center of the channel 121 to form one flexible shield 130 similar to a spiral stair, and then a plurality of flexible shields 130 similar to a spiral stair may be provided, and the plurality of flexible shields 130 may be overlapped and arranged along the center of the channel 121.

In one embodiment, referring to fig. 1 and 5, a blowout preventer 122 is provided on a side of the blowout preventer 120 adjacent to the outlet end 110a of the spout valve 100. Wherein the blowout preventing surface 122 is a cambered surface. When liquid flows from the outlet end 110a to the inside of the circulation cavity 110, the cambered surface can effectively decompose the impact force of the liquid, and when the liquid impacts the bottom of the cambered surface, the two sides of the bottom can be drained so that the liquid flows along the cambered surface to the two sides, thereby relieving the stamping of the liquid and playing the role of blowout prevention.

In one embodiment, spout valve 100 includes a plurality of chamber segments 140 connected in sequence, wherein the flow cross-section of chamber segment 140 proximate outlet end 110a of spout valve 100 is greater in adjacent two chamber segments 140 than in chamber segment 140 distal outlet end 110a of spout valve 100.

The "through-flow cross section" means: the cross section perpendicular to the direction of flow of the liquid as it flows through the flow-through chamber 110.

In this way, when the liquid flows from the outlet end 110a of the orifice valve 100 to the inlet end 110b of the orifice valve 100, the flow cross section gradually decreases, so that a throttling effect is generated, the pressure of the liquid is reduced, and the blowout prevention effect is achieved. It will be appreciated that the phenomenon of pressure drop of fluid flowing in a pipeline after passing through a valve, a slit, an orifice and the like with suddenly reduced flow cross section is called throttling.

In one embodiment, referring to fig. 1 and 5, the orifice valve 100 includes a first chamber section 141, a second chamber section 142, and a third chamber section 143 connected in sequence. Wherein the through-flow cross-section of the first chamber section 141 is larger than the through-flow cross-section of the second chamber section 142, and the through-flow cross-section of the second chamber section 142 is larger than the through-flow cross-section of the third chamber section 143.

In the embodiment of the present application, a step is disposed between the first cavity section 141 and the second cavity section 142, so that the transition of the circulation cavity 110 between the first cavity section 141 and the second cavity section 142 is achieved, and the through-flow cross section of the second cavity section 142 is smaller than that of the first cavity section 141. In addition, a first boss 150 is provided between the second chamber section 142 and the third chamber section 143, so that, on the one hand, the blowout preventer 120 can be connected to the first boss 150, and on the other hand, a transition from the second chamber section 142 to the third chamber section 143 can be realized.

It will be appreciated that the through-flow cross-section of the flow chamber 110 of each chamber segment 140 may also gradually decrease from a side near the outlet end 110a of the orifice valve 100 to a side far from the outlet end 110a of the orifice valve 100, and the flow chamber 110 of the adjacent chamber segment 140 may also transition through an arcuate surface, and the specific arrangement of the chamber segments 140 is not limited in this embodiment.

In one embodiment, referring to fig. 6 and 7, the liquid blowout preventer 10 includes a clamp tube 200 with an outlet end 110a of the orifice valve 100 sleeved over an inlet end 210b of the clamp tube 200. The clamp pipe 200 includes a plurality of pipe sections 210 connected in sequence, wherein the through-flow cross section of the pipe section 210 distant from the orifice valve 100 is larger than the through-flow cross section of the pipe section 210 close to the orifice valve 100 in every adjacent two pipe sections 210.

It will be appreciated that liquid flows from the outlet end 210a of the clamp tube 200 to the inlet end 210b of the clamp tube 200, and that the inlet end 210b of the clamp tube 200 is adjacent to the outlet end 110a of the orifice valve 100. In this way, when the liquid flows from the outlet end 210a of the pipe 200 to the inlet end 210b of the pipe 200, the flow cross section gradually decreases, so that a throttling effect is generated, the pressure of the liquid is reduced, and the blowout prevention effect is achieved.

In one embodiment, the clamp tube 200 includes a first tube segment 211, a second tube segment 212, and a third tube segment 213 connected in sequence, the first tube segment 211 being located on a side of the second tube segment 212 remote from the orifice valve 100, and the third tube segment 213 being located on a side of the second tube segment 212 near the orifice valve 100. The through-flow cross-section of the first tube section 211 is larger than the through-flow cross-section of the second tube section 212, and the through-flow cross-section of the second tube section 212 is larger than the through-flow cross-section of the third tube section 213.

In the embodiment of the present application, by providing a step between the first pipe section 211 and the second pipe section 212, on one hand, a transition of the through-flow section between the first pipe section 211 and the second pipe section 212 can be achieved, so that the through-flow section of the second pipe section 212 is smaller than the through-flow section of the first pipe section 211; on the other hand, the step can also block the liquid from flowing to the outlet end 210a of the forceps channel pipe 200, thereby playing a role in blowout prevention.

In addition, a second boss 220 and a blowout prevention cavity section 230, which are sequentially connected, are provided on one side of the third pipe section 213 near the nozzle valve 100, and the through-flow section of the blowout prevention cavity section 230 is larger than that of the third pipe section 213. By making the through-flow cross section of the blowout prevention cavity section 230 larger than that of the third pipe section 213, the flow passage of the fluid can be widened, the fluid pressure can be reduced, and the blowout prevention effect can be achieved. By providing the second boss 220, the second boss 220 can block the flow of the liquid to the outlet end 210a of the clamp pipe 200, and play a role in blowout prevention. Referring to fig. 6 and 7, the blowout prevention chamber section 230 and the second boss 220 are located in the first chamber section 141 when assembled.

It will be appreciated that the through-flow cross-section of each pipe segment 210 may also gradually decrease from the side of the outlet end 210a of the forceps pipe 200 to the side away from the outlet end 210a of the forceps pipe 200, and the through-flow cross-section of the adjacent pipe segment 210 may also be transited through the arc surface, and the specific arrangement mode of the pipe segment 210 is not limited in this embodiment of the present application.

In one embodiment, referring to fig. 5 and 6, a groove 240 is provided on the outer wall of the clamp tube 200, and a protrusion 160 is provided on the inner wall of the orifice valve 100 to be engaged with the groove 240. In this way, the clamp tube 200 and the orifice valve 100 can be assembled firmly so that they are not easily loosened.

In one embodiment, referring to fig. 8, 9 and 10, the liquid blowout preventer further includes a bonnet 300, and the bonnet 300 is fitted to the inlet end 110b of the spout valve 100. Specifically, a portion of the bonnet 300 is embedded in the third cavity section 143. In addition, a connection handle 310 is further provided on the valve cap 300, and one end of the connection handle 310 is connected with the valve cap 300, and the other end is connected with the outer wall surface of the nozzle valve 100, so that the valve cap 300 can be prevented from being lost after the valve cap 300 is disassembled.

In a second aspect, embodiments of the present application provide an endoscope comprising the liquid blowout preventer of the first aspect described above for fitting at an instrument passage opening of an operating section.

In the endoscope, the flexible shielding body 130 is arranged in the channel 121 of the blowout preventer 120, so that on one hand, the flexible shielding body 130 can prevent liquid from flowing out of the channel 121 of the blowout preventer 120 and improve the use experience of the endoscope; on the other hand, when the auxiliary medical instrument is inserted from the inlet end 110b of the orifice valve 100, the flexible shielding body has a flexible structure, so that abrasion of the auxiliary medical instrument can be reduced.

In the description of the present specification, reference to the terms "some embodiments," "other embodiments," "desired embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

The technical features of the above embodiments may be arbitrarily combined, and for brevity, all of the possible combinations of the technical features of the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A liquid blowout preventer, characterized in that the liquid blowout preventer (10) comprises a nozzle valve (100);

the pipe orifice valve (100) is provided with a circulation cavity (110), the inner wall surface of the circulation cavity (110) is provided with a blowout prevention body (120), and the blowout prevention body (120) is provided with a channel (121) penetrating through the circulation cavity (110);

the inner wall surface of the channel (121) is provided with a flexible shielding body (130), the flexible shielding body (130) is provided with a through hole (131), and the through hole (131) is used for passing through an auxiliary medical instrument.

2. The liquid blowout preventer according to claim 1, wherein the through hole (131) is located in the center of the flexible barrier (130), the flexible barrier (130) being ring-shaped;

the flexible shielding body (130) is provided with a plurality of cuts (132), and the cuts (132) are radially distributed along the center of the flexible shielding body (130).

3. The liquid blowout preventer according to claim 1, wherein the flexible shutter (130) comprises a plurality of sub-shutters (133), the through-hole (131) extending through the plurality of sub-shutters (133) along a center of the channel (121);

the plurality of sub-shields (133) are arranged radially along the center of the channel (121), and gaps are arranged between adjacent sub-shields (133); or (b)

The plurality of sub-shields (133) are spirally arranged in a stepwise manner along the center of the passage (121).

4. A liquid blowout preventer according to any one of claims 1-3, wherein the blowout preventer (120) is provided with a blowout preventer surface (122) on a side thereof which is close to the outlet end (110 a) of the spout valve (100); wherein, the blowout prevention surface (122) is a cambered surface.

5. A liquid blowout preventer according to any one of claims 1-3, wherein the nozzle valve (100) comprises a plurality of chamber segments (140) connected in sequence, wherein the through-flow cross-section of the chamber segments (140) close to the outlet end (110 a) of the nozzle valve (100) is larger in two adjacent chamber segments (140) than in the chamber segments (140) further away from the outlet end (110 a) of the nozzle valve (100).

6. The liquid blowout preventer according to claim 5, wherein the nozzle valve (100) comprises a first chamber section (141), a second chamber section (142) and a third chamber section (143) connected in sequence; wherein the through-flow cross section of the first cavity section (141) is larger than the through-flow cross section of the second cavity section (142), and the through-flow cross section of the second cavity section (142) is larger than the through-flow cross section of the third cavity section (143);

a first boss (150) is arranged between the second cavity section (142) and the third cavity section (143), and the blowout preventer (120) is connected to the first boss (150).

7. The liquid blowout preventer according to claim 6, wherein the liquid blowout preventer (10) comprises a clamp pipe (200), the outlet end (110 a) of the orifice valve (100) being sleeved on the inlet end (210 b) of the clamp pipe (200);

the forceps tube (200) comprises a plurality of tube sections (210) which are connected in sequence, wherein the through-flow cross section of the tube section (210) far away from the tube orifice valve (100) is larger than the through-flow cross section of the tube section (210) near the tube orifice valve (100) in every two adjacent tube sections (210).

8. The liquid blowout preventer according to claim 7, wherein the clamp pipe (200) comprises a first pipe section (211), a second pipe section (212) and a third pipe section (213) connected in sequence, the first pipe section (211) being located on a side of the second pipe section (212) remote from the nozzle valve (100), the third pipe section (213) being located on a side of the second pipe section (212) close to the nozzle valve (100); the through-flow cross section of the first pipe section (211) is larger than the through-flow cross section of the second pipe section (212), and the through-flow cross section of the second pipe section (212) is larger than the through-flow cross section of the third pipe section (213);

a second boss (220) and a blowout prevention cavity section (230) which are sequentially connected are arranged on one side, close to the pipe orifice valve (100), of the third pipe section (213), and the through flow section of the blowout prevention cavity section (230) is larger than that of the third pipe section (213); the blowout prevention cavity section (230) and the second boss (220) are located in the first cavity section (141).

9. The liquid blowout preventer according to claim 8, wherein the outer wall of the pipe (200) is provided with a groove (240), and the inner wall of the pipe orifice valve (100) is provided with a protrusion (160) engaged with the groove (240);

and/or, the liquid blowout preventer (10) further comprises a bonnet (300), the bonnet (300) being fitted to the inlet end (110 b) of the spout valve (100).

10. An endoscope, characterized by comprising a liquid blowout preventer (10) according to any one of claims 1-9.