CN117100985A

CN117100985A - One-way drainage mechanism for drainage pipe and drainage pipe

Info

Publication number: CN117100985A
Application number: CN202311321742.XA
Authority: CN
Inventors: 王曦冉; 杨忠生; 刘强
Original assignee: Beijing Gaojing Xinte Medical Equipment Co ltd
Current assignee: Beijing Gaojing Xinte Medical Equipment Co ltd
Priority date: 2023-10-12
Filing date: 2023-10-12
Publication date: 2023-11-24
Anticipated expiration: 2043-10-12
Also published as: CN117100985B

Abstract

The application relates to the technical field of clinical diversion devices, and discloses a one-way drainage mechanism for a diversion pipe, which comprises a variable volume structural member, a first channel and a second channel, wherein the variable volume structural member is provided with a variable volume cavity, and the first channel and the second channel are communicated with the variable volume cavity; the first valve core is arranged in the first channel, limits a first direction from the first channel to the variable volume cavity, and can be opened under the action of pressure difference to be communicated from the variable volume cavity to a second direction of the first channel; the second valve core is arranged in the second channel, limits the first direction from the variable volume cavity to the second channel, and can be opened under the action of pressure difference to lead the second direction from the second channel to the variable volume cavity. The unidirectional drainage mechanism realizes unidirectional conventional drainage, and simultaneously, liquid suction and liquid drainage can be carried out by controlling the volume of the variable volume cavity, so that the drainage effect is enhanced, and the pumping function similar to that of a drainage pump is realized. The application also discloses a honeycomb duct.

Description

One-way drainage mechanism for drainage pipe and drainage pipe

Technical Field

The application relates to the technical field of flow guiding devices, in particular to a one-way flow guiding mechanism for a flow guiding pipe and the flow guiding pipe.

Background

At present, in medical clinic, the flow guide pipe is widely used, and the flow guide pipe leads accumulated effusion to be led out of the body, prevents infection and promotes rehabilitation. For example, urinary catheters are a conduit that is inserted into the urinary bladder from the urethra in order to drain urine, primarily for patients with urinary retention or bladder outlet obstruction, urinary incontinence, prolonged bedridden or forced posture, surgical peri-operative period. As another example, an abdominal cavity drainage tube drains the intra-abdominal dropsy to the outside of the body.

In the current honeycomb duct at the water conservancy diversion in-process, the front end of honeycomb duct stretches into in vivo, and the front end has the drainage entry, and the hydrops utilizes the dead weight to get into the drainage entry of honeycomb duct front end, flows along the body to the collection container of body end-to-end connection.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the existing flow guide pipe utilizes the flow guide mode of the effusion dead weight mode, and under the condition that a clot is generated in the effusion, the clot is extremely easy to stay in a drainage part to cause blockage.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a one-way drainage mechanism and honeycomb duct for honeycomb duct, provides a one-way drainage mechanism, is applicable to honeycomb duct, for example, catheter, under the prerequisite that realizes conventional drainage function, can also realize imbibition function and flowing back function, reinforcing drainage effect realizes the pumping function of similar drainage pump.

In some embodiments, the one-way drainage mechanism for a flow conduit comprises: the variable volume structural member is provided with a variable volume cavity, and a first channel and a second channel which are communicated with the variable volume cavity; the first valve core is arranged in the first channel, limits a first direction from the first channel to the variable volume cavity, and can be opened under the action of pressure difference to conduct from the variable volume cavity to a second direction of the first channel; the second valve core is arranged in the second channel, limits the first direction from the variable volume cavity to the second channel, and can be opened under the action of pressure difference to be communicated from the second channel to the second direction of the variable volume cavity; wherein the opening threshold of the first valve core and the second valve core is 0.1KPa to 1KPa.

Optionally, the first valve core or the second valve core includes: a valve core body comprising one or more valve plates; when the valve core body comprises a valve plate, the area of the valve plate is larger than the sectional area of the first channel or the second channel; the edges of the other parts are bent and abutted against the wall surface of the inner wall of the first channel or the second channel; when the valve core body comprises a plurality of valve plates, the valve plates are in butt joint to form the valve core body, and the valve core body is provided with an outer contour matched with the inner wall of the first channel or the second channel so as to be arranged in the first channel or the second channel; edges of the butt joint parts of the valve plates are abutted and bent to form protruding parts protruding out of the plane where the valve core body is located.

Optionally, in the case that the valve body includes a plurality of valve plates, edges of the butt joint portions of the plurality of valve plates are connected, and an opening is provided at an end portion of the protrusion.

Optionally, the first valve core or the second valve core includes: the first valve block and the second valve block are oppositely arranged with the first valve block to form a valve core body; the valve core body is provided with an outer contour matched with the inner wall of the first channel or the second channel so as to be arranged in the first channel or the second channel; the edge of the joint of the first valve plate and the second valve plate is abutted and bent to form a protruding part protruding out of the plane of the valve core body.

Optionally, edges of the abutting parts of the first valve plate and the second valve plate are connected, and an opening is formed in the protruding end face of the protruding part.

Optionally, the first valve core or the second valve core further includes: the connecting ring piece is matched with the inner wall of the first channel or the second channel; the valve core body is arranged on the inner annular surface of the connecting ring piece.

Optionally, a first connecting structure is arranged on the outer ring surface of the connecting ring piece, and a second connecting structure is arranged on the inner wall of the first channel and/or the second channel; the first connecting structure and the second connecting structure can be connected in an adapting mode so as to limit/fix the first valve core and/or the second valve core in the corresponding first channel and/or the second channel respectively.

Optionally, the materials of the first valve core and the second valve core are rubber or latex respectively.

Optionally, in the variable volume structural member, the first channel and the second channel are located on opposite sides of the variable volume chamber in an axial direction thereof, respectively, the variable volume chamber being deformable in the axial direction thereof to change the volume of the variable volume chamber.

Optionally, the variable volume structural member comprises: the variable volume piece is provided with a variable volume cavity, and a first communication port and a second communication port which are formed in the cavity wall of the variable volume cavity; a first passage member configured with a first passage and provided in communication with the first communication port; and the second channel piece is provided with a second channel and is communicated with the second communication port.

Optionally, the variable volume member comprises a bellows-like body; or, the variable volume piece comprises an open cylinder body and a piston piece, the piston piece comprises a piston head, the piston head is inserted into the open cylinder body, the piston head and the inner wall of the open cylinder body are arranged in a sealing way and can slide relatively, a variable volume cavity is formed between the piston head and the bottom wall of the open cylinder body, a first communication port is arranged at the piston head, and a second communication port is arranged at the sealing end face of the open cylinder body.

Optionally, the one-way drainage mechanism further comprises: a first housing disposed outside the variable volume chamber; the second shell is arranged outside the variable volume cavity and is detachably connected with the first shell; the first housing and the second housing are configured to form a housing when connected, and the variable volume chamber is located inside the housing.

Optionally, the first channel and the second channel are disposed on opposite sides of the variable volume chamber; one end of the first shell is fixedly arranged at a first communication position between the variable volume cavity and the first channel, and the other end of the first shell is provided with a first detachable connecting structure; one end of the second shell is fixedly arranged at a second communication position between the variable volume cavity and the second channel, and the other end of the second shell is provided with a second detachable connecting structure; the first shell and the second shell are detachably connected through a first detachable connecting structure and a second detachable connecting structure.

In some embodiments, the draft tube comprises: a tube body; the unidirectional drainage mechanism according to any one of the preceding claims, which is provided on a tube section on the distal end side of the tube body and is communicated with a pipe of the tube body.

The unidirectional drainage mechanism for the flow guide pipe and the flow guide pipe provided by the embodiment of the disclosure can realize the following technical effects:

the unidirectional drainage mechanism for the flow guide pipe changes the pressure in the variable volume cavity by utilizing the volume change of the variable volume cavity of the variable volume structural member, so that the pressure difference between the pressure in the variable volume cavity and the pressure on the first channel side or the second channel side is realized, and unidirectional conventional drainage is realized. Meanwhile, the liquid suction and liquid discharge can be performed by controlling the volume of the volume-variable cavity, so that the drainage effect is enhanced, and the pumping function similar to that of a drainage pump is realized.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic view of a structure of a one-way drainage mechanism in a conventional drainage state provided by an embodiment of the present disclosure;

FIG. 2 is a schematic view of a structure of a unidirectional drainage mechanism in a liquid-absorbing state according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a structure of a one-way drainage mechanism in a drainage state according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of another one-way drainage mechanism according to an embodiment of the present disclosure in a conventional drainage state;

FIG. 5 is a schematic cross-sectional structural view of the one-way drainage mechanism shown in FIG. 4;

FIG. 6 is a schematic illustration of a structure of another one-way drainage mechanism in a liquid-imbibed state provided by embodiments of the present disclosure;

FIG. 7 is a schematic cross-sectional structural view of the one-way drainage mechanism shown in FIG. 6;

FIG. 8 is a schematic view of another one-way drainage mechanism according to an embodiment of the present disclosure in a drainage state;

FIG. 9 is a schematic cross-sectional structural view of the one-way drainage mechanism shown in FIG. 8;

FIG. 10 is a schematic structural view of a valve cartridge provided by an embodiment of the present disclosure;

FIG. 11 is a schematic structural view of a valve cartridge provided by an embodiment of the present disclosure;

FIG. 12 is a schematic cross-sectional view of a valve cartridge provided by an embodiment of the present disclosure;

FIG. 13 is a schematic view of a first channel member (first valve body) of another one-way drainage mechanism provided by an embodiment of the present disclosure;

fig. 14 is a schematic cross-sectional structural view of the first passage member (first valve body) shown in fig. 13;

FIG. 15 is a schematic view of another one-way drainage mechanism provided by an embodiment of the present disclosure;

FIG. 16 is a schematic view of the structure of the end portion of a nozzle according to an embodiment of the present disclosure;

FIG. 17 is a schematic view of a tube end portion of another flow conduit according to an embodiment of the present disclosure;

fig. 18 is a schematic structural view of a tube body end portion of another flow guide tube according to an embodiment of the present disclosure.

Reference numerals:

10. a unidirectional drainage mechanism; 101. a variable volume chamber; 102. a first channel; 103. a second channel; 11. a variable volume structural member; 111. a variable volume member; 112. a first channel member; 113. a second channel member; 114. an open cylinder; 1141. sealing the end; 115. a piston member; 1151. a piston head; 1152. a piston rod; 12. a first valve core; 13. a second valve core; 141. a first valve plate; 1411. root part; 1412. an open end; 142. a second valve plate; 143. a connecting ring member; 1431. a first connection structure; 1432. a second connection structure; 144. a protruding portion; 1441. an end portion; 145. an opening; 15. a housing; 151. a first housing; 1510. a first detachable connection structure; 152. a second housing; 1520. a second detachable connection structure; 16. a drainage direction mark; 20. a tube body; 21. a terminal end; 22. a receiving container; 30. and a wire pulling mechanism.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are, for example, capable of operation in connection with other embodiments. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

The unidirectional drainage mechanism 10 for a drainage pipe according to the embodiments of the present disclosure can realize unidirectional drainage by using a pressure difference between the pressure in the variable volume chamber 101 and the pressure on the first channel 102 side or the second channel 103 side. Therefore, the application range is wide, and the application range is not limited to the application scene of the honeycomb duct as an example in the embodiment of the disclosure. The unidirectional drainage mechanism 10 of the embodiment of the present disclosure can be applied to the same flow guiding scene as the flow guiding requirement of the flow guiding pipe.

Referring to fig. 1-15, embodiments of the present disclosure provide a one-way drainage mechanism 10 for a flow conduit, including a variable volume structural member 11, a first valve spool 12, and a second valve spool 13. The variable volume structural member 11 is provided with a variable volume chamber 101, a first passage 102 and a second passage 103 communicating with the variable volume chamber 101; the first valve core 12 is disposed in the first channel 102, defines a first directional cut-off from the first channel 102 to the variable volume chamber 101, and is openable under a pressure differential to be conducted from the variable volume chamber 101 to a second directional cut-off from the first channel 102; the second valve core 13 is arranged in the second channel 103, defines a first direction cut-off from the variable volume chamber 101 to the second channel 103, and can be opened under the action of pressure difference to be communicated from the second channel 103 to the second direction of the variable volume chamber 101; wherein the opening threshold of the first valve core and the second valve core is 0.1KPa to 1KPa.

The unidirectional drainage mechanism 10 of the embodiment of the present disclosure changes the pressure in the variable volume chamber 101 by using the volume change of the variable volume chamber 101 of the variable volume structural member 11, so that the pressure difference between the pressure in the variable volume chamber 101 and the pressure on the first channel 102 side or the second channel 103 side realizes unidirectional conventional drainage. Meanwhile, by controlling the volume of the variable volume cavity 101, liquid suction and liquid discharge can be performed, the drainage effect is enhanced, and the pumping function similar to that of a drainage pump is realized.

In the embodiment of the present disclosure, the flow direction from the second channel 103 to the first channel 102 is defined as the second direction, whereas the flow direction from the first channel 102 to the second channel 103 is defined as the first direction. Wherein the first direction is the off direction, i.e. the drainage from the first channel 102 to the second channel 103 is inhibited.

In the unidirectional drainage mechanism 10 of the embodiment of the present disclosure, in a normal state, both the first valve core 12 and the second valve core 13 are in a closed state. In this normal state, as shown in conjunction with fig. 1 and 5, when the second pressure P on the second passage 103 side ₂ Increase the second pressure P ₂ And the intra-cavity pressure P in the variable-volume chamber 101 ₀ Is not equal to the second differential pressure deltaP ₂ Above the second opening threshold of the second valve element 13, the second valve element 13 opens to be conducted from the second passage 103 to the second direction (direction indicated by arrow in fig. 1) of the variable volume chamber 101, fluid enters the variable volume chamber 101, and at the same time, the opening of the second valve element 13 causes the chamber pressure P to be equal to ₀ Increasing the pressure P in the cavity ₀ With the first channel 102 sideA pressure P ₁ Is a first difference DeltaP of (1) ₁ Above the first opening threshold of the first valve element 12, the first valve element 12 opens to be conducted from the variable volume chamber 101 to the second direction (direction indicated by an arrow in fig. 1) of the first passage 102, thereby causing the fluid on the second passage 103 side to flow to the first passage 102 side to flow out, realizing a conventional one-way drainage function, and the first valve element 12 and the second valve element 13 are in an open state as shown in fig. 1.

As shown in fig. 2, 6 and 7, when the unidirectional drainage mechanism 10 performs liquid suction, the volume of the controlled variable volume chamber 101 is increased, so that the pressure P in the chamber of the variable volume chamber 101 is reduced ₀ Thereby increasing the second pressure difference delta P ₂ The second valve core 13 is opened or opened to a larger degree, so that the drainage pressure of the second channel 103 side is relatively improved, and the drainage capacity is improved; at the same time, the intra-cavity pressure P ₀ Is reduced by a first difference value delta P ₁ Decreasing even to a negative value, the first valve element 12 is closed, and the fluid on the second passage 103 side is sucked into the variable volume chamber 101, thereby realizing the fluid suction function.

As shown in fig. 3, 8 and 9, when the unidirectional drainage mechanism 10 performs drainage, the volume of the variable volume chamber 101 is controlled to be smaller, and the pressure P in the chamber of the variable volume chamber 101 is controlled to be smaller ₀ Increase and then the second pressure difference delta P ₂ Decreasing or even becoming negative, the second valve element 13 is closed; at the same time, the intra-cavity pressure P ₀ Is increased by a first difference DeltaP ₁ Increasing to be larger than the first opening threshold of the first valve core 12, the first valve core 12 is opened, and the fluid in the variable volume cavity 101 is discharged from the first channel 102, so as to complete the liquid discharging function.

In the unidirectional drainage mechanism 10 of the embodiment of the present disclosure, the first opening threshold of the first valve core 12 and the second opening threshold of the second valve core 13 may be determined according to the application scenario to which the unidirectional drainage mechanism is applied.

For example, the one-way drainage mechanism 10 is applied to a clinical catheter. The clinical honeycomb duct is used for leading accumulated liquid in a patient to the outside of the body, preventing infection and promoting rehabilitation. When the second passage 103 of the one-way drainage mechanism 10 is communicated with the body, the second pressure P on the second passage 103 side ₂ I.e. the internal pressure of the drainage partTherefore, the first opening threshold and the second opening threshold can be determined according to the relation between the effusion of the drainage part and the internal pressure. Optionally, the first turn-on threshold is 0.1KPa to 1KPa. Optionally, the second turn-on threshold is 0.1KPa to 1KPa.

In one embodiment, the one-way drainage mechanism 10 is applied to a catheter and is attached to a section of the catheter body 20 distal to the section 21. The second channel 103 side of the unidirectional drainage mechanism 10 is communicated with the bladder side, and the second pressure P of the second channel 103 side ₂ The first opening threshold and the second opening threshold can be determined according to the relation between urine in the bladder and the pressure. Optionally, the first turn-on threshold is 0.3KPa to 0.6KPa. Specifically, the first turn-on threshold is 0.5KPa. Optionally, the second turn-on threshold is 0.3KPa to 0.6KPa. Optionally, the second turn-on threshold is 0.5KPa.

In the embodiment of the present disclosure, the first passage 102 provided with the first valve spool 12 may be regarded as one structural member, i.e., a first valve body (as shown in fig. 13); the second passage 103 provided with the second spool 13 is regarded as one structural member, i.e., a second valve body. That is, the unidirectional drainage mechanism can be obtained by disposing the first valve body in communication with the variable volume chamber 101 and disposing the second valve body in communication with the variable volume chamber 101.

In some embodiments, the first spool 12 or the second spool 13 comprises a spool body that includes one or more valve plates.

Alternatively, in the case where the spool body includes a valve plate (denoted as a first-type spool body), the area of the valve plate is larger than the cross-sectional area of the first passage 102 or the second passage 103; part of the edges of the valve plates are arranged on the inner wall of the first channel 102 or the second channel 103, and the other part of the edges are bent and attached to the inner wall surface of the first channel 102 or the second channel 103. In the first type valve core body of the embodiment, the edges of the rest parts are bent to form bending edges, the bending edges are attached to the inner wall surface of the channel, and the bending edges can deform along the bending direction to be separated from the inner wall surface of the channel to form a space so as to open the valve core; when the back deformation, make the edge of buckling laminate the inner wall surface of passageway more, realize stopping.

It will be appreciated that in the first type of spool body of the present embodiment, the bent edge of the first spool 12 is bent in a direction away from the variable volume chamber 101 so that a first direction from the first passage 102 to the variable volume chamber 101 is blocked and can be opened by a pressure difference to be conducted from the variable volume chamber 101 to a second direction of the first passage 102. The bent edge of the second spool 13 is bent toward the direction of the variable volume chamber 101 so that a first direction from the variable volume chamber 101 to the second passage 103 is blocked, and can be opened by a pressure difference to be conducted from the second passage 103 to a second direction of the variable volume chamber 101.

Optionally, the valve sheet comprises a deformable valve sheet. In this embodiment, the valve plate can deform, so as to improve the sensitivity of the differential pressure, so as to be suitable for application scenarios with smaller values of the first opening threshold and the second opening threshold. Such as clinical draft tubes.

Alternatively, as shown in connection with fig. 10 to 12, in the case where the spool body includes a plurality of valve plates (denoted as a second-type spool body), the plurality of valve plates are butted to constitute the spool body, the spool body having an outer contour adapted to an inner wall of the first passage 102 or the second passage 103 so as to be disposed in the first passage 102 or the second passage 103; edges of the butt joint parts of the valve plates are abutted and bent to form protruding parts protruding out of the plane where the valve core body is located. In this embodiment, the plurality of bending portions of the plurality of valve plates form the protruding portions relatively, and edges of the plurality of bending portions are attached, and the plurality of bending portions can be deformed continuously along the bending direction under the action of pressure difference so as to separate the edges to form a space to open the valve core; when reverse deformation, the edges of the bending parts are more attached to realize cut-off.

The second type valve core body of the present embodiment including a plurality of valve plates is constructed as a duckbill valve-like valve core structure. The opening 145 of the first valve element 12 or the second valve element 13 is located at the middle portion, facilitating the circulation of fluid.

It will be appreciated that the projection of the first valve spool 12 is disposed in a direction away from the variable volume chamber 101 such that a first direction from the first passage 102 to the variable volume chamber 101 is blocked and can open under a pressure differential to conduct from the variable volume chamber 101 to a second direction of the first passage 102. The protruding portion of the second spool 13 is disposed toward the variable volume chamber 101 such that a first direction from the variable volume chamber 101 to the second passage 103 is blocked, and is openable by a pressure difference to be conducted from the second passage 103 to a second direction of the variable volume chamber 101.

Optionally, in the case that the valve body includes a plurality of valve plates, edges of the butt joint portions of the plurality of valve plates are connected, and an opening is provided at an end portion of the protrusion. In the second type valve core body of the embodiment, the opening length of the valve core is reduced, the integrity of the valve core is improved, and the intercepting effectiveness is improved.

In the second type valve element body of the embodiment of the disclosure, the number of the valve plates may be two, three, four, five or the like. And determining according to actual conditions.

The shape of the opening of the second type valve core body is not limited. Alternatively, the opening is a linear opening or a branched opening made up of a plurality of linear openings.

Optionally, the linear opening comprises a straight opening.

Alternatively, the branched openings include V-shaped openings, Y-shaped openings, X-shaped openings, or cross-shaped openings, among others.

In one specific application, as shown in fig. 10 to 12, the first valve core 12 or the second valve core 13 includes a first valve sheet 141 and a second valve sheet 142. The second valve plate 142 is disposed opposite to the first valve plate 141 to form a valve core body (second type valve core body); the valve core body has an outer contour matched with the inner wall of the first channel 102 or the second channel 103 so as to be arranged in the first channel 102 or the second channel 103; the edges of the abutting joint of the first valve plate 141 and the second valve plate 142 are abutted and bent in the same direction to form a protruding part 144 protruding out of the plane of the valve body. In this embodiment, the first bending portion of the first valve plate 141 and the second bending portion of the second valve plate 142 form a protruding portion 144 opposite to each other, and the edge of the first bending portion is attached to the edge of the second bending portion, and the first bending portion and the second bending portion can be deformed continuously along the bending direction under the action of pressure difference to separate the edges to form a gap so as to open the valve core; when reverse deformation, the edge of the first bending part is more attached to the edge of the second bending part, so that cut-off is realized. The first spool 12 or the second spool 13 of the present embodiment is constructed as a duckbill valve type spool structure. The opening 145 of the valve core is located in the middle portion to facilitate the flow of fluid.

Alternatively, as shown in fig. 10 and 11, the edges of the junction of the first and second valve plates 141 and 142 are connected, and an opening 145 is provided on the end 1441 of the protrusion 144. In the embodiment, the opening length of the valve core is reduced, the integrity of the valve core is improved, and the intercepting effectiveness is improved. The opening 145 is a linear opening, for example, a straight opening.

In the above embodiment, the first-type spool body and the second-type spool body are each constituted by a valve plate, and the valve plate includes a root 1411 for connecting with the inner wall of the first passage 102 or the second passage 103 where it is located and an open end 1412 forming the opening 145. And it is necessary to provide a certain deformability to a portion of the valve sheet of the open end 1412 so as to be bendable.

Alternatively, the first spool 12 and the second spool 13 each employ a spool body of the second type. For example, a spool body including a first valve sheet 141 and a second valve sheet 142 is shown in fig. 10 and 11.

Alternatively, the first spool 12 adopts a first-type spool body, and the second spool 13 adopts a second-type spool body.

Alternatively, the first spool 12 adopts a second-type spool body, and the second spool 13 adopts a first-type spool body.

Optionally, the first valve plate 141 and the second valve plate 142 are deformable valve plates. In this embodiment, the valve plate can deform, so as to improve the sensitivity of the differential pressure, so as to be suitable for application scenarios with smaller values of the first opening threshold and the second opening threshold. Such as clinical draft tubes.

Optionally, the material of the valve plate includes an elastic material. The valve plate has certain deformability and can be opened under the action of pressure difference. According to the actual application scene, the adaptive elastic material is selected.

Optionally, the valve plate comprises an elastic polymer material. Optionally, the material of the valve plate comprises rubber or latex. The valve plate of the embodiment has good deformability, so that the opening threshold of the constructed valve core is small, namely the required pressure difference is small.

Optionally, the valve plate is made of a hard elastic material. Optionally, the valve plate is made of plastic. The valve plate of the embodiment has low deformability, so that the opening threshold of the constructed valve core is large, namely the required pressure difference is large.

In some embodiments, the thickness of the valve sheet decreases from the root 1411 to the open end 1412 with a predetermined pattern. In this embodiment, the preset rule of decreasing the thickness of the deformable valve plate is not limited, and may be decreasing according to a linear rule or decreasing according to a curve rule, for example, a parabola.

Alternatively, the root 1411 of the valve sheet is 0.5mm to 5mm thick and the open end 1412 is 0.1mm to 1mm thick. And selecting and determining according to actual requirements.

Alternatively, the root 1411 of the valve plate is 0.5mm thick and the open end 1412 is 0.1mm thick. Is suitable for the flow guide pipe of clinical medicine.

In some embodiments, the first valve plate 141 or the second valve plate 142 further comprises a connecting ring 143, the connecting ring 143 fitting with the inner wall of the first channel 102 or the second channel 103; the valve core body is disposed on the inner annular surface of the connecting ring 143. The provision of the connecting ring 143 facilitates the placement of the spool (first spool 12 or second spool 13) within the corresponding channel (first channel 102 or second channel 103). For example, the connecting ring 143 is disposed in the first channel 102 or the second channel 103 in an interference manner; for another example, the outer annular surface of the connecting ring 143 is fixedly connected, e.g., bonded, welded or heat-pressed, to the inner side wall of the first channel 102 or the second channel 103; etc.

In this embodiment, for the first type valve core body, a part of the edge of the valve plate is disposed on the inner annular surface of the connecting ring 143. For the second type of spool body, the edge of the outer contour of the spool body is disposed on the inner annulus of the connecting ring 143.

In this embodiment, the material of the connecting ring 143 and the material of the valve plate may be the same or different. And determining according to actual needs.

Alternatively, the connecting ring 143 is integrally formed with the spool body.

Optionally, the materials of the first valve core 12 and the second valve core 13 include rubber or latex.

Optionally, as shown in fig. 10 to 14, the outer ring surface of the connection ring 143 is provided with a first connection structure 1431, and the inner wall of the first channel 102 and/or the second channel 103 is provided with a second connection structure 1432; wherein the first and second connection structures 1431, 1432 are adapted to be connected to retain/secure the first and/or second spools 12, 13 within the corresponding first and/or second passages 102, 103, respectively. In this embodiment, by arranging the adaptive connection structure on the inner wall of the connecting ring 143 and the channel, the first valve core 12 or the second valve core 13 is fixed or limited, so that the connection between the two is more stable.

Alternatively, as shown in fig. 13 and 14, the first connection structure 1431 includes a boss, and the second connection structure 1432 is a groove formed on an inner sidewall of the first channel 102 and/or the second channel 103. The boss is inserted in the groove, and when realizing spacing, the boss can also be fixed through the interference fit of boss and groove.

In the embodiment of the present disclosure, the structure of the variable volume structural member 11 is not limited as long as it has the variable volume chamber 101 and the first and second passages 102 and 103 communicating with the variable volume chamber 101. And the volume of the variable volume chamber 101 can be increased or decreased to thereby enable the variation of the intra-chamber pressure P within the variable volume chamber 101 ₀ 。

In some embodiments, the variable volume structural member has a first channel and a second channel on axially opposite sides of the variable volume chamber, respectively, the variable volume chamber being deformable in its axial direction to vary the volume of the variable volume chamber. The volume change of the variable volume cavity is conveniently controlled.

In some embodiments, as shown in connection with fig. 4 to 9, the variable volume structural member 11 includes a variable volume member 111, a first channel 102 member and a second channel 103 member, and the variable volume member 111 is configured with a variable volume chamber 101 and a first communication port and a second communication port opened on a chamber wall of the variable volume chamber 101; the first passage 102 is configured with a first passage 102, and is disposed in communication with the first communication port; the second passage 103 is configured with a second passage 103, and is provided in communication with the second communication port. The volume-variable structural member 11 of the present embodiment may be integrally formed, or may be formed by connecting three independent members, which is not limited thereto.

Alternatively, as shown in fig. 5 to 9, the variable volume member 111 includes a bellows-like tube body. By axially compressing/stretching the corrugated tube body, i.e. changing its volume.

Alternatively, as shown in fig. 15, the variable volume member 111 includes an open cylinder 114 and a piston member 115, the piston member 115 includes a piston head 1151, the piston head 1151 is inserted into the open cylinder 114, and the piston head 1151 is sealingly disposed with an inner wall of the open cylinder 114 and is relatively slidable, so that a variable volume chamber 101 is formed between the piston head 1151 and a bottom wall of the open cylinder 114. The variable volume member 111 of the present embodiment changes the volume of the variable volume chamber 101 by pushing/pulling the piston member 115 (piston head 1151) in the axial direction. Wherein the first communication port is provided in piston head 1151 and the second communication port is provided in sealed end surface 1141 of open cylinder 114.

Optionally, the piston member 115 further includes a piston rod 1152 disposed on an outer side of the piston head 1151. The movement of the piston member is conveniently controlled.

Optionally, the piston member 115 further includes a piston rod 1152, and the piston rod 1152 is provided with a through hole along an axis; the piston rod 1152 is disposed on an outer side surface of the piston head 1151 in such a manner that the through hole communicates with a first communication port provided on the piston head 1151. In this embodiment, the first communication port of the variable volume member 111 is integrated to the piston rod 1152, and the piston rod 1152 can replace the first channel member 112, which is compact and easy to implement.

Optionally, a sealing structure is provided on the wall of piston head 1151 that slidingly engages the inner wall of open cylinder 114. To increase the seal between piston head 1151 and the inner wall of open cylinder 114. Optionally, the sealing structure comprises a sealing ring.

In some embodiments, as shown in connection with fig. 4-9, the unidirectional drainage mechanism 10 further includes a first housing 151 and a second housing 152, the first housing 151 being disposed outside of the variable volume chamber 101; the second housing 152 is provided outside the variable volume chamber 101 and is detachably connected to the first housing 151. The housing 15 is constituted when the first housing 151 and the second housing 152 are connected, and the variable volume chamber 101 is located inside the housing 15. In this embodiment, a first housing 151 and a second housing 152 that are detachably connected are added outside the variable volume chamber 101, and when they are in a detached state, the two housings 15 can be held to control the change of the variable volume chamber 101, so that the unidirectional drainage mechanism 10 performs liquid suction or liquid drainage; when the first housing 151 and the second housing 152 are connected to form the housing 15, the housing is enclosed outside the variable volume chamber 101, and the variable volume chamber 101 is protected, and at this time, the unidirectional drainage mechanism 10 performs normal drainage.

Alternatively, the first channel 102 and the second channel 103 are provided on opposite sides of the variable volume chamber 101; one end of the first housing 151 is fixedly arranged at a first communication position between the variable volume cavity 101 and the first channel 102, and the other end is provided with a first detachable connection structure 1510; one end of the second housing 152 is fixedly arranged at a second communication position between the variable volume cavity 101 and the second channel 103, and the other end is provided with a second detachable connection structure 1520; the first and second housings 151 and 152 are detachably connected by the first and second detachable connection structures 1510 and 1520.

In the present embodiment, the shapes of the first housing 151 and the second housing 152 are not limited, and may be determined according to the shape of the variable volume chamber 101.

Alternatively, as shown in fig. 5 to 9, the first and second cases 151 and 152 each have an open cover structure, and open ends of the first and second cases 151 and 152 are detachably connected. In the present embodiment, the inner chamber of the housing 15 formed by connecting the first housing 151 and the second housing 152 is cylindrical, and the shape of the chamber 101 adapted to the variable volume is cylindrical. For example, the variable volume chamber 101 is a lumen of the bellows body 20.

In this embodiment, the first detachable connection structure 1510 and the second detachable connection structure 1520 are not limited, and may be detachable connection.

Optionally, the first releasable connection 1510 is externally threaded and the second releasable connection 1520 is internally threaded. And the screw connection is convenient and quick.

Optionally, the external thread and the internal thread adopt a quick-connection thread structure. For example, the external thread is a thread of less than one turn, and the internal thread is a thread of a corresponding length.

Optionally, the external thread is a quarter thread and the internal thread is a quarter thread of a corresponding length.

Optionally, the external thread is a half thread and the internal thread is a half thread of a corresponding length.

In some embodiments, a drainage direction marker 16 is provided on the outer wall surface of the unidirectional drainage pump. To indicate the drainage marker. The form of the drainage direction marker 16 is not limited, for example, an arrow (as shown in fig. 4).

Optionally, shallow grooves are engraved on the outer wall surface of the unidirectional drainage pump to form drainage direction marks 16.

Optionally, a drainage direction marker 16 is provided on the outer wall surface of the first channel 102 and/or the second channel 103. In this embodiment, the drainage direction marks 16 are engraved on the outer wall surface.

As shown in fig. 1 to 18, the embodiment of the present disclosure further provides a flow guiding tube, including a tube body 20 and the unidirectional drainage mechanism 10 of any of the foregoing embodiments, where the unidirectional drainage mechanism 10 is disposed on a tube section on the end 21 side of the tube body 20 and is in communication with a pipe of the tube body 20.

The flow guiding tube provided in the embodiments of the present disclosure, because of including the unidirectional drainage mechanism 10 in any of the embodiments, has all the advantages of the unidirectional drainage mechanism 10 in any of the embodiments, and is not described herein.

In the embodiment of the disclosure, the types of the flow guide pipes are not limited, and any flow guide pipe with unidirectional flow guide function requirements can be used.

Optionally, the draft tube comprises a clinical draft tube. At present, the flow guide pipes in clinical medicine are divided into different types according to different characteristics. For example, depending on the shape of the proximal retention mechanism of the catheter (e.g., urinary catheter), the catheter includes balloon-type and skeleton-type catheters; for another example, the operation control of the flow guide pipe can be divided into a stay wire type flow guide pipe and a push rod type flow guide pipe according to different operation control parts of the flow guide pipe; as another example, the guide tube comprises a catheter and an abdominal cavity drainage tube according to different guide positions; etc.

In the flow guide tube of the embodiment of the present disclosure, the unidirectional drainage mechanism 10 is disposed on the tube section on the end 21 side of the tube body 20, and may be directly connected to the end 21 port of the tube body 20; or may be serially connected to the pipe section at the end 21 of the pipe body 20; etc.

Alternatively, the unidirectional drainage mechanism 10 is integrally formed with the tube 20.

Alternatively, as shown in fig. 16, the catheter comprises a urinary catheter. The unidirectional drainage mechanism 10 is applied to the catheter, provides drainage capability of the catheter, and can smoothly discharge clots (such as blood clots) in the bladder under larger drainage pressure through the drainage tube so as to avoid the risk of urine retention caused by blockage of the drainage tube due to the clots.

Alternatively, as shown in fig. 18, the flow guiding pipe comprises a stay wire type flow guiding pipe, a stay wire mechanism 30 is further arranged on the pipe section on the side of the tail end 21 of the pipe body 20, and the unidirectional drainage mechanism 10 is connected to the pipe section between the stay wire mechanism 30 and the tail end 21.

Optionally, as shown in fig. 17, a receiving container 22 is further connected to a port at the end 21 of the tube body 20 of the flow guide tube to receive the effusion drained by the drainage.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A unidirectional drainage mechanism for a flow guide tube, comprising:

the variable volume structural member is provided with a variable volume cavity, and a first channel and a second channel which are communicated with the variable volume cavity;

the first valve core is arranged in the first channel, limits a first direction from the first channel to the variable volume cavity, and can be opened under the action of pressure difference to conduct from the variable volume cavity to a second direction of the first channel;

the second valve core is arranged in the second channel, limits the first direction from the variable volume cavity to the second channel, and can be opened under the action of pressure difference to be communicated from the second channel to the second direction of the variable volume cavity;

wherein the opening threshold of the first valve core and the second valve core is 0.1KPa to 1KPa.

2. The one-way drain mechanism of claim 1, wherein the first valve element or the second valve element comprises:

a valve core body comprising one or more valve plates;

when the valve core body comprises a valve plate, the area of the valve plate is larger than the sectional area of the first channel or the second channel; the edges of the other parts are bent and abutted against the wall surface of the inner wall of the first channel or the second channel;

when the valve core body comprises a plurality of valve plates, the valve plates are in butt joint to form the valve core body, and the valve core body is provided with an outer contour matched with the inner wall of the first channel or the second channel so as to be arranged in the first channel or the second channel; edges of the butt joint parts of the valve plates are abutted and bent to form protruding parts protruding out of the plane where the valve core body is located.

3. The one-way drain mechanism according to claim 2, wherein in the case where the valve body includes a plurality of valve plates, edges of the butt joint portions of the plurality of valve plates are connected, and an opening is provided at an end portion of the protruding portion.

4. The one-way drain mechanism according to claim 2, wherein the first valve spool or the second valve spool further comprises:

the connecting ring piece is matched with the inner wall of the first channel or the second channel; the valve core body is arranged on the inner annular surface of the connecting ring piece.

5. The unidirectional drainage mechanism of claim 4, wherein a first connection structure is provided on an outer annulus of the connection ring, and a second connection structure is provided on an inner wall of the first channel and/or the second channel; the first connecting structure and the second connecting structure can be connected in an adapting mode so as to limit/fix the first valve core and/or the second valve core in the corresponding first channel and/or the second channel respectively.

6. The one-way drainage mechanism of claim 2, wherein the thickness of the valve sheet decreases from the root to the open end with a predetermined pattern.

7. The one-way drainage mechanism of any of claims 1 to 6, wherein the variable volume structural member comprises:

the variable volume piece is provided with a variable volume cavity, and a first communication port and a second communication port which are formed in the cavity wall of the variable volume cavity;

a first passage member configured with a first passage and provided in communication with the first communication port;

and the second channel piece is provided with a second channel and is communicated with the second communication port.

8. The one-way drainage mechanism of claim 7, wherein,

the variable volume member includes a bellows-like tube body; or alternatively

The variable volume member includes a balloon structure; or alternatively

The variable volume piece comprises an open cylinder body and a piston piece, the piston piece comprises a piston head, the piston head is inserted into the open cylinder body, the piston head and the inner wall of the open cylinder body are arranged in a sealing mode and can slide relatively, and a variable volume cavity is formed between the piston head and the bottom wall of the open cylinder body.

9. The one-way drainage mechanism of any of claims 1 to 6, further comprising:

a first housing disposed outside the variable volume chamber;

the second shell is arranged outside the variable volume cavity and is detachably connected with the first shell;

the first housing and the second housing are configured to form a housing when connected, and the variable volume chamber is located inside the housing.

10. The one-way drainage mechanism of claim 9, wherein,

the first channel and the second channel are arranged on opposite sides of the variable volume chamber;

one end of the first shell is fixedly arranged at a first communication position between the variable volume cavity and the first channel, and the other end of the first shell is provided with a first detachable connecting structure;

one end of the second shell is fixedly arranged at a second communication position between the variable volume cavity and the second channel, and the other end of the second shell is provided with a second detachable connecting structure;

the first shell and the second shell are detachably connected through a first detachable connecting structure and a second detachable connecting structure.

11. A draft tube, comprising:

a tube body;

the one-way drainage mechanism according to any one of claims 1 to 10, which is provided in a tube section on a distal end side of the tube body and communicates with a pipe of the tube body.