CN111920494B - Rod piece sealing structure and puncture outfit - Google Patents
Rod piece sealing structure and puncture outfit Download PDFInfo
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- CN111920494B CN111920494B CN202010905979.2A CN202010905979A CN111920494B CN 111920494 B CN111920494 B CN 111920494B CN 202010905979 A CN202010905979 A CN 202010905979A CN 111920494 B CN111920494 B CN 111920494B
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- 238000007789 sealing Methods 0.000 title claims abstract description 216
- 238000003825 pressing Methods 0.000 claims abstract description 143
- 230000000149 penetrating effect Effects 0.000 claims abstract description 16
- 230000003247 decreasing effect Effects 0.000 claims abstract description 3
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000005060 rubber Substances 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008093 supporting effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3419—Sealing means between cannula and body
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Sealing Devices (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a rod sealing structure and a puncture outfit, and belongs to the technical field of medical appliances. The rod sealing structure comprises an elastic sealing sleeve and an elastic bracket, wherein a penetrating channel for a rod to penetrate is formed in the elastic sealing sleeve in a penetrating mode, the elastic bracket is sleeved on the elastic sealing sleeve, the connecting end of the pressing arm is connected with the sleeve, the pressing end is elastically pressed on the elastic sealing sleeve, the inner wall of the sealing end of the elastic sealing sleeve is in sealing contact with the outer wall of the rod, the pressing ends of the pressing arms are annularly arranged to form a pressing ring, and the inner diameter of the pressing ring can be adaptively increased or decreased according to the diameter of the rod, so that the elastic sealing sleeve seals rods with different diameters. According to the rod piece sealing structure, the elastic bracket is arranged, and the sealing end of the elastic sealing sleeve can be propped against the rod piece by using the elastic bracket, so that good sealing performance can be ensured when the diameter of the rod piece changes in a large range, the elastic sealing sleeve does not need to be customized again, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a rod sealing structure and a puncture outfit.
Background
In the medical field, there are many gas or liquid bearing devices in which sealing is required, and sealing between a rod moving in the bearing device and the outside is critical to the whole device, and the sealing is generally achieved by a sealing structure sleeved on the rod. In the existing sealing structure, a plastic sealing sleeve with better elasticity is mostly adopted, and the plastic sealing sleeve is used as a peripheral sealing medium to realize dynamic matching with the rod piece, so that the sealing effect is achieved.
Because the specifications of the rod pieces are different, when the diameter of the rod pieces is changed, the diameter of the rod pieces is limited by the optimal elastic adaptation range of plastic materials, and the existing plastic sealing sleeve can realize a good sealing effect only in a small diameter change range of the rod pieces. When the diameter of the rod piece is changed greatly, the sealing effect of the rod piece and the plastic sealing sleeve cannot be ensured. In order to ensure the sealing effect, a plastic sealing sleeve with one specification needs to be matched for each diameter rod piece, so that the cost is increased, and the sealing effect is poor due to the fact that the matching error easily occurs in the actual matching process.
Disclosure of Invention
The invention aims to provide a rod sealing structure which can be suitable for sealing rods with different diameters and has good sealing effect.
To achieve the purpose, the invention adopts the following technical scheme:
a rod sealing structure comprising:
the elastic sealing sleeve is provided with a penetrating channel for the rod piece to penetrate through in a penetrating way, and one end of the elastic sealing sleeve is a sealing end;
the elastic bracket comprises a sleeving structure and a plurality of pressing arms, the sleeving structure is sleeved on the elastic sealing sleeve, one end of each pressing arm is a connecting end, the other end of each pressing arm is a pressing end, the connecting end is connected with the sleeving structure, and the pressing ends elastically press the elastic sealing sleeve so that the inner wall of each sealing end is in sealing abutting connection with the outer wall of each rod piece;
The pressing ends of the pressing arms are annularly arranged to form pressing rings, and the inner diameters of the pressing rings are configured to be increased or decreased according to the diameters of the rod pieces so that the elastic sealing sleeves seal the rod pieces with different diameters.
Preferably, the plurality of pressing arms include a first pressing arm group and a second pressing arm group, the pressing arms in the first pressing arm group are first pressing arms, the pressing arms in the second pressing arm group are second pressing arms, and the first pressing arms and the second pressing arms are inclined in the axial direction of the rod piece and have opposite inclination directions.
Preferably, at least one second pressing arm is arranged between two adjacent first pressing arms, at least one first pressing arm is arranged between two adjacent second pressing arms, and the adjacent first pressing arms and the adjacent second pressing arms are arranged in a crossing mode.
Preferably, the elastic sealing sleeve comprises a plurality of sealing sub-sleeves which are nested, each sealing sub-sleeve comprises a taper sleeve part and a first flanging which is outwards protruded along the circumference of the large-diameter end of the taper sleeve part, the taper sleeve part is provided with an opening in a penetrating manner along the direction of a bus, the opening extends and penetrates through the first flanging, and the opening of each adjacent two sealing sub-sleeves is arranged in a staggered manner.
Preferably, a first annular sleeve part is arranged between the taper sleeve part and the first flanging;
the sleeve structure comprises a second annular sleeve part and a second flanging which is outwards protruded along the circumferential direction of the second annular sleeve part, the second annular sleeve part is sleeved on the first annular sleeve part, and the second flanging and the first flanging are stacked.
Preferably, the pressing arm comprises a first connecting rod, a second connecting rod and a pressing rod which are sequentially connected, the first connecting rod is connected with the sleeving structure, the second connecting rod is attached to the conical surface of the taper sleeve part, and the pressing rod presses against the elastic sealing sleeve.
Preferably, the second connecting rod is a straight rod or a corrugated rod.
Preferably, the pressing rod is an arc-shaped rod, the middle part of the arc-shaped rod is pressed on the elastic sealing sleeve, and the free end of the arc-shaped rod is obliquely arranged in a direction away from the elastic sealing sleeve.
Preferably, the material of the pressing arm is any one or a combination of metal, alloy, carbon fiber, rubber, resin and plastic.
Another object of the present invention is to provide a puncture outfit with good sealing effect during operation.
To achieve the purpose, the invention adopts the following technical scheme:
The puncture outfit comprises the rod piece sealing structure, wherein the rod piece is a puncture needle.
The invention has the beneficial effects that:
the embodiment provides a member sealing structure, this member sealing structure includes elastic sealing cover and elastic bracket, run through on the elastic sealing cover and be equipped with the passageway of wearing that supplies the member to pass, the elastic bracket is including overlapping and establish structure and a plurality of pressure arm that support, the cover is established the structure cover and is established on the elastic sealing cover, the link and the cover of pressure arm are established the structure and are connected, the pressure end elasticity is supported and is pressed on the elastic sealing cover, so that the inner wall of the sealed end of elastic sealing cover and the sealed butt of outer wall of member, the pressure end of a plurality of pressure arms is the annular and arranges in order to form the pressure ring, the internal diameter of pressure ring is configured to can be according to the diameter of member and carry out the increase or reduce adaptively, in order to make the member of the sealed different diameters of elastic sealing cover. According to the rod piece sealing structure, the elastic bracket is arranged, and the sealing end of the elastic sealing sleeve can be propped against the rod piece by using the elastic bracket, so that good sealing performance can be ensured when the diameter of the rod piece changes in a large range, the elastic sealing sleeve does not need to be customized again, and the cost is reduced.
Drawings
FIG. 1 is a schematic view of a rod sealing structure provided by the invention sleeved on a rod with a large diameter;
FIG. 2 is an exploded view of the rod sealing structure of the present invention sleeved on a rod with a large diameter;
FIG. 3 is a schematic view of a sealing sub-sleeve of the rod sealing structure provided by the invention;
FIG. 4 is a schematic view of the elastic bracket sleeved on the large-diameter rod piece;
FIG. 5 is a front view of the resilient bracket of the present invention sleeved on a large diameter rod;
FIG. 6 is a top view of the resilient bracket of the present invention sleeved on a large diameter rod;
FIG. 7 is a schematic view of the rod sealing structure of the present invention sleeved on a small diameter rod;
FIG. 8 is a schematic view of the elastic bracket sleeved on the small-diameter rod piece;
FIG. 9 is a front view of the resilient bracket of the present invention sleeved on a small diameter rod;
fig. 10 is a top view of the elastic bracket sleeved on the small-diameter rod piece provided by the invention.
In the figure:
100. A rod piece;
1. An elastic sealing sleeve; 11. sealing the sub-sleeve; 101. a taper sleeve part; 102. an opening; 103. a first flanging; 104. a first collar portion; 105. a first connection hole;
2. An elastic bracket; 21. a sleeving structure; 211. a second collar portion; 212. a second flanging; 22. a pressing arm; 221. the first pressing arm; 222. the second pressing arm; 2201. a first connecting rod; 2202. a second connecting rod; 2203. a pressing rod; 23. and a second connection hole.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The present embodiment provides a rod sealing structure that can achieve sealing between the rod 100 in a moving state and the outside, and can be applied to rods 100 of different diameters. As shown in fig. 1 to 10, the rod sealing structure specifically includes an elastic sealing sleeve 1 and an elastic bracket 2. Wherein, the elastic sealing sleeve 1 is provided with a penetrating channel, and the penetrating channel penetrates through the elastic sealing sleeve 1 to allow the rod member 100 to penetrate. One end of the elastic sealing sleeve 1 is a penetrating end, the other end is a sealing end, the penetrating channel forms an inserting port on the penetrating end, the sealing end forms a sealing port, and the rod piece 100 penetrates into the penetrating channel from the inserting port and penetrates out of the sealing port. In the present embodiment, the rod member 100 is a cylindrical rod, however, in other embodiments, the rod member 100 may be an elliptical rod with an elliptical cross section.
Optionally, the through passage is a tapered through hole, the diameter of the insertion opening is larger than the diameter of the rod 100, the diameter of the sealing opening is equal to or slightly smaller than the diameter of the smallest rod 100, and when the diameter of the sealing opening is equal to or slightly smaller than the diameter of the rod 100, the elastic sealing sleeve 1 is made of elastic material, such as rubber, gel or silica gel, so that the size of the sealing opening can be adjusted according to the diameter of the rod 100, so that the rod 100 can pass smoothly.
The elastic bracket 2 is used for pressing the sealing end of the elastic sealing sleeve 1 against the rod piece 100, so that no matter what size relation the diameter of the rod piece 100 and the diameter of the sealing opening is, the inner wall of the sealing end can be always in sealing contact with the outer wall of the rod piece 100, and a good sealing effect is ensured between the elastic sealing sleeve 1 and the rod piece 100. Specifically, as shown in fig. 4 to 6 and fig. 8 to 10, the elastic bracket 2 includes a sleeve structure 21 and a plurality of pressing arms 22, and the sleeve structure 21 is an annular structure, and can be sleeved on the elastic sealing sleeve 1, so as to realize the relative fixation of the elastic bracket 2 and the elastic sealing sleeve 1. One end of the pressing arm 22 is a connecting end, the other end is a pressing end, the connecting end is connected with the sleeving structure 21 in an included angle, and the pressing end elastically presses against the elastic sealing sleeve 1 to press the sealing end of the elastic sealing sleeve 1, so that the inner wall of the sealing end is in sealing tight contact with the outer wall of the rod piece 100. The elastic bracket 2 can be manufactured by adopting a multi-component connection assembly or integral molding mode, and technologies such as welding, bonding, 3D printing, casting or encapsulation and the like are adopted.
In this embodiment, the elastic bracket 2 is integrally in a basketball net shape, the pressing arm 22 can be made of one or a combination of metal, alloy, carbon fiber, rubber, resin and plastic with good elasticity, and the alloy can be made of memory alloy, titanium alloy, stainless steel or spring steel, so that the elastic bracket 2 has good elasticity, and the included angle between the pressing arm 22 and the sleeving structure 21 can be changed under the action of external force so as to adapt to different elastic sealing sleeves 1. Moreover, the pressing ends of the plurality of pressing arms 22 of the elastic bracket 2 are annularly arranged to form a pressing ring, the pressing ring is circumferentially arranged around the sealing end of the elastic sealing sleeve 1, and the diameter of the pressing ring can be changed under the action of external force.
Specifically, when the diameter of the rod member 100 passing through the elastic sealing sleeve 1 changes, for example, as shown in fig. 1 and 7, when the rod member 100 with a large diameter changes to the rod member 100 with a small diameter, or the rod member 100 with a small diameter changes to the rod member 100 with a large diameter, the size of the sealing end of the elastic sealing sleeve 1 is reduced or increased under the supporting action of the rod member 100, and the distance between the adjacent supporting arms 22 can be correspondingly changed according to the size change of the elastic sealing sleeve 1, so that the inner diameter of the supporting ring is adaptively reduced or increased, so as to ensure that the supporting ring is always stably supported on the elastic sealing sleeve 1.
According to the rod sealing structure, the elastic bracket 2 is arranged, the sealing end of the elastic sealing sleeve 1 is propped against the rod 100 by the elastic bracket 2, so that good sealing performance can be guaranteed when the diameter of the rod 100 changes in a large range, the rod 100 with different diameters can be sealed by the elastic sealing sleeve 1, the elastic sealing sleeve 1 does not need to be customized again, cost is reduced, the requirement on the dimensional precision of the sealing end of the elastic sealing sleeve 1 is reduced, and even if the dimensional deviation of the sealing end occurs, the rod 100 can be well sealed under the propping pressure of the elastic bracket 2.
In order to enable the elastic sealing sleeve 1 to automatically adjust its size according to the rod member 100 penetrating therein, so as to adapt to rod members 100 of different diameters, so as to improve the versatility of the elastic sealing sleeve 1, as shown in fig. 2, in this embodiment, the elastic sealing sleeve 1 includes a plurality of sealing sub-sleeves 11 that are nested, specifically, the number of the sealing sub-sleeves 11 may be two, three, four or more, and four in this embodiment, may be provided according to the requirement.
Specifically, as shown in fig. 3, the sealing sub-sleeve 11 is in a valve funnel shape, and specifically includes a taper sleeve portion 101 and a first flange 103, the taper sleeve portion 101 includes a large diameter end and a small diameter end, the first flange 103 is outwardly protruded along a circumferential direction of the large diameter end of the taper sleeve portion 101, and the small diameter end of the taper sleeve portion 101 is a sealing end of the elastic sealing sleeve 1. The taper sleeve portion 101 is provided with an opening 102 penetrating in the bus direction, the opening 102 extends and penetrates the first flange 103, the width of the opening 102 is adjusted according to requirements, and the openings 102 of two adjacent sealing sub-sleeves 11 are arranged in a staggered mode. Alternatively, a first collar portion 104 is provided between the taper sleeve portion 101 and the first flange 103, the first collar portion 104 being provided perpendicular to the first flange 103 to form an L-shaped structure, the first collar portion 104 being connected to the large diameter end of the taper sleeve portion 101.
The plurality of sealing sub-sleeves 11 have the same structure and slightly different sizes, so that the plurality of sealing sub-sleeves 11 can be nested to form a whole. When a plurality of sealing sub-sleeves 11 are assembled into the elastic sealing sleeve 1, the plurality of sealing sub-sleeves 11 are nested in sequence from inside to outside or from outside to inside according to the size; then, the adjacent two sealing sub-sleeves 11 are rotated with the axial direction of the sealing sub-sleeve 11 as the center, so as to adjust the positions and the overlapping ranges of the open ports 102 of the adjacent two sealing sub-sleeves 11; finally, the first flanges 103 of two adjacent sealing sub-sleeves 11 abut against each other, thus completing the assembly of the elastic sealing sleeve 1.
The funnel openings of the plurality of sealing sub-sleeves 11 form the sealing openings of the elastic sealing sleeve 1, and the sealing openings are in a contracted state in a natural state, and the diameter of the sealing openings is smaller than that of the minimum rod piece 100. When the rod member 100 passes through the sealing opening of the elastic sealing sleeve 1, the sealing opening of the elastic sealing sleeve 1 and the adjacent taper sleeve part 101 of the sealing sub-sleeve 11 can relatively move under the expansion and compression action of the rod member 100, so that the diameter of the sealing opening of the elastic sealing sleeve 1 changes in real time along with the expansion or the shrinkage of the diameter of the rod member 100, and the adaptation with the rod member 100 is achieved.
In order to avoid separation between the sealing sub-sleeves 11 and between the elastic sealing sleeve 1 and the elastic bracket 2 in the working process of the rod sealing structure, a first connecting hole 105 is formed in the first flange 103, a second connecting hole 23 is formed in the sleeving structure 21 of the elastic bracket 2, and when the sealing sub-sleeves 11 are nested and assembled with the elastic bracket 2, connecting pieces can be used to penetrate through the first connecting hole 105 and the second connecting hole 23, so that relative fixation between the sealing sub-sleeves 11 and between the elastic sealing sleeve 1 and the elastic bracket 2 is realized, and the phenomenon of mutual separation is avoided. Alternatively, the number of the first connecting holes 105 and the second connecting holes 23 may be set to be plural as required, and disposed in the circumferential direction of the first burring 103 and the sheathing structure 21, respectively.
In addition, the connecting member may be fixed to other structures after passing through the first and second connection holes 105 and 23, for example, when the rod sealing structure is used for a puncture outfit, the rod 100 is a puncture needle, and the connecting member may be fixed to other internal members of the puncture outfit after passing through the first and second connection holes 105 and 23, thereby avoiding the occurrence of the detachment phenomenon of the rod sealing structure from the inside of the puncture outfit during the upward and downward movement of the puncture needle.
It should be noted that, the connection piece can only circumferentially limit the large diameter ends of the taper sleeve portions 101 of the plurality of seal sub-sleeves 11, and does not circumferentially limit the small diameter ends of the taper sleeve portions 101 of the seal sub-sleeves 11, so that the diameter of the seal opening of the elastic seal sleeve 1 is not affected to change in real time along with the expansion or contraction of the diameter of the rod member 100.
As shown in fig. 4 to 10, in the present embodiment, the sleeving structure 21 includes a second collar portion 211 and a second flange 212 protruding outwards along the circumferential direction of the second collar portion 211, the second collar portion 211 and the second flange 212 are vertically connected to form an L shape, the second collar portion 211 is used for sleeving on the first collar portion 104 to achieve the relative fixation of the elastic sealing sleeve 1 and the elastic bracket 2, and the second flange 212 and the first flange 103 are stacked to improve the fixation effect.
The connection end of the pressing arm 22 is connected to the second collar portion 211, and the pressing end is in a free state. Alternatively, as shown in fig. 6 and 10, the pressing arm 22 includes a first connecting rod 2201, a second connecting rod 2202, and a pressing rod 2203 connected in this order. The first connecting rod 2201 is a linear rod, and one end of the first connecting rod, which is far away from the second connecting rod 2202, is a connecting end of the pressing arm 22, and is used for connecting with the second ring sleeve portion 211, and the connecting mode may be welding or bonding. The second connecting rod 2202 is attached to the conical surface of the taper sleeve portion 101, alternatively, the second connecting rod 2202 may be a linear rod or a corrugated rod, preferably a corrugated rod, so that a plurality of pressing points are formed on the taper sleeve portion 101 of the elastic sealing sleeve 1, and the pressing effect on the elastic sealing sleeve 1 is improved. The pressing rod 2203 is a pressing end of the pressing arm 22, and elastically presses against the sealing end of the elastic sealing sleeve 1. Optionally, the pressing rod 2203 is an arc rod, the middle part of the arc rod is pressed on the elastic sealing sleeve 1, the free end of the arc rod is obliquely arranged in a direction away from the elastic sealing sleeve 1, and the arc rod can be in contact with the sealing end point of the elastic sealing sleeve 1, so that the pressing force on the sealing end is increased, and the sealing effect of the sealing end on the rod piece 100 is improved.
Further, in the present embodiment, the plurality of pressing arms 22 are divided into two groups, namely, a first pressing arm group and a second pressing arm group. The pressing arms 22 in the first pressing arm set are called a first pressing arm 221, the pressing arms 22 in the second pressing arm set are called a second pressing arm 222, the number of the first pressing arm 221 and the second pressing arm 222 is plural, and the first pressing arm 221 and the second pressing arm 222 are inclined relative to the axial direction of the rod 100, and the inclination directions are opposite. That is, the first pressing arms 221 and the second pressing arms 222 form a certain inclined angle with the axis of the second ring portion 211, and the plurality of first pressing arms 221 are sequentially arranged around the axis of the second ring portion 211, and the plurality of second pressing arms 222 are sequentially arranged around the axis of the second ring portion 211 in a reverse direction.
In the present embodiment, the plurality of first pressing arms 221 of the first pressing arm group rotate counterclockwise along the circumferential direction of the sheathing structure 21, and the plurality of second pressing arms 222 of the second pressing arm group rotate clockwise along the circumferential direction of the sheathing structure 21. The two groups of pressing arms 22 can be oppositely arranged about the symmetry plane of the sleeving structure 21, and can also be mutually crossed, and preferably are crossed, so that the pressing effect of the pressing arms 22 on the elastic sealing sleeve 1 is further improved.
Specifically, in the present embodiment, as shown in fig. 4 to 10, one second pressing arm 222 is provided between two adjacent first pressing arms 221, one first pressing arm 221 is provided between two adjacent second pressing arms 222, and the adjacent first pressing arms 221 and second pressing arms 222 are disposed to intersect so that the plurality of pressing arms 22 of the elastic bracket 2 intersect to form a mesh structure. The pressing arm 22 located at the outer side in the mesh structure can press the pressing arm 22 located at the inner side, so that the pressing effect is further improved. Of course, in other embodiments, two or more first pressing arms 221 may be grouped together, a set of second pressing arms 222 is disposed between two sets of first pressing arms 221, a set of second pressing arms 222 may include one or more second pressing arms 222, and adjacent sets of first pressing arms 221 and a set of second pressing arms 222 are disposed in a crossing manner.
The assembly process of the rod sealing structure is as follows:
The elastic bracket 2 is sleeved outside the funnel-shaped elastic sealing sleeve 1, namely, the lower surface of the first flanging 103 of the elastic sealing sleeve 1 is directly pressed down on the second flanging 212 of the elastic bracket 2 and is in close contact with the second flanging, and the outer surface of the first loop part 104 of the elastic sealing sleeve 1 is directly abutted against the inner surface of the second loop part 211 of the elastic bracket 2 and is in close contact with the second flanging. That is, the funnel-shaped elastic sealing sleeve 1 is directly sleeved in the elastic bracket 2 and they are matched in shape and closely contacted with each other, and it should be noted that the elastic sealing sleeve 1 and the elastic bracket 2 are closely contacted but are in respective free non-connected states. The abutment arms 22 are pressed against the outer wall of the elastic sealing sleeve 1. The rod member 100 passes through the penetrating channel of the elastic sealing sleeve 1, and the plurality of sealing sub-sleeves 11 constituting the freely movable portion of the elastic sealing sleeve 1 are stretched by being subjected to the tension of the rod member 100. Due to the pressing force of the pressing arms 22 and the contraction force of the elastic sealing sleeve 1, the sealing sub-sleeve 11 is pressed on the outer wall of the rod member 100, and the overlapped parts of the plurality of sealing sub-sleeves 11 are always in close contact, so that the sealing effect is achieved. When the diameter of the rod member 100 changes, the pressing arm 22 can provide a larger pressing force, and the elastic deformation reaction speed is high, so that the tight contact between the sealing sub-sleeve 11 and the outer wall of the rod member 100 can be ensured, and the overlapped parts of the sealing sub-sleeves 11 can move relatively to each other due to the matching with the rod member 100, but the pressing force provided by the pressing arm 22 can ensure that the overlapped parts of the sealing sub-sleeves 11 are always tightly contacted, so that the sealing performance is well ensured.
The embodiment also provides a puncture outfit, which comprises the rod sealing structure, and the puncture needle of the puncture outfit is the rod 100. By using the rod sealing structure, the tightness in the puncturing process can be ensured, and the operation effect is improved.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. A rod sealing structure, comprising:
the elastic sealing sleeve (1), wherein a penetrating channel for a rod piece (100) to penetrate is penetrated through the elastic sealing sleeve (1), and one end of the elastic sealing sleeve (1) is a sealing end;
The elastic bracket (2) comprises a sleeving structure (21) and a plurality of pressing arms (22), wherein the sleeving structure (21) is sleeved on the elastic sealing sleeve (1), one end of each pressing arm (22) is a connecting end, the other end of each pressing arm is a pressing end, the connecting end is connected with the sleeving structure (21), and the pressing ends elastically press against the elastic sealing sleeve (1) so that the inner wall of each sealing end is in sealing abutting connection with the outer wall of the rod piece (100);
The pressing ends of the plurality of pressing arms (22) are annularly arranged to form a pressing ring, and the inner diameter of the pressing ring is configured to be increased or decreased according to the diameter of the rod piece (100) so that the elastic sealing sleeve (1) seals the rod piece (100) with different diameters;
The pressing arms (22) comprise a first pressing arm group and a second pressing arm group, the pressing arms (22) in the first pressing arm group are first pressing arms (221), the pressing arms (22) in the second pressing arm group are second pressing arms (222), and the first pressing arms (221) and the second pressing arms (222) are obliquely arranged in the axial direction of the rod piece (100) and are opposite in inclination direction;
The elastic sealing sleeve (1) comprises a plurality of sealing sub-sleeves (11) which are nested, each sealing sub-sleeve (11) comprises a taper sleeve part (101) and a first flanging (103) which is outwards protruded along the circumference of the large-diameter end of each taper sleeve part (101), each taper sleeve part (101) is provided with an opening (102) in a penetrating manner along the direction of a bus, each opening (102) extends and penetrates through each first flanging (103), and the adjacent two sealing sub-sleeves (11) are arranged in a staggered manner in each opening (102).
2. The lever seal structure of claim 1 wherein,
At least one second pressing arm (222) is arranged between two adjacent first pressing arms (221), at least one first pressing arm (221) is arranged between two adjacent second pressing arms (222), and the adjacent first pressing arms (221) and the adjacent second pressing arms (222) are arranged in a crossing mode.
3. The lever seal structure of claim 1 wherein,
A first annular sleeve part (104) is arranged between the taper sleeve part (101) and the first flanging (103);
The sleeving structure (21) comprises a second annular sleeve part (211) and a second flanging (212) protruding outwards along the circumferential direction of the second annular sleeve part (211), the second annular sleeve part (211) is sleeved on the first annular sleeve part (104), and the second flanging (212) and the first flanging (103) are arranged in a stacked mode.
4. A rod sealing structure according to claim 3, wherein,
The first annular sleeve part (104) and the first flanging (103) are vertically arranged to form an L-shaped structure, and the second annular sleeve part (211) and the second flanging (212) are vertically connected to form an L-shaped structure.
5. The lever seal structure of claim 1 wherein,
The pressing arm (22) comprises a first connecting rod (2201), a second connecting rod (2202) and a pressing rod (2203) which are sequentially connected, the first connecting rod (2201) is connected with the sleeved structure (21), the second connecting rod (2202) is attached to the conical surface of the taper sleeve part (101), and the pressing rod (2203) is pressed on the elastic sealing sleeve (1).
6. The lever seal of claim 5, wherein the lever seal comprises a sealing member,
The second connecting rod (2202) is a straight rod or a corrugated rod.
7. The lever seal of claim 5, wherein the lever seal comprises a sealing member,
The pressing rod (2203) is an arc-shaped rod, the middle part of the arc-shaped rod is pressed on the elastic sealing sleeve (1), and the free end of the arc-shaped rod is obliquely arranged in the direction away from the elastic sealing sleeve (1).
8. Rod sealing structure according to claim 1, characterized in that the elastic carrier (2) is manufactured in a multi-part connection assembly or in an integrated manner.
9. The rod sealing structure according to any one of claims 1 to 8, wherein,
The pressing arm (22) is made of any one or combination of metal, alloy, carbon fiber, rubber, resin and plastic.
10. A puncture device, characterized by comprising the rod sealing structure according to any of claims 1-9, the rod (100) being a puncture needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010905979.2A CN111920494B (en) | 2020-09-01 | 2020-09-01 | Rod piece sealing structure and puncture outfit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010905979.2A CN111920494B (en) | 2020-09-01 | 2020-09-01 | Rod piece sealing structure and puncture outfit |
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| CN111920494A CN111920494A (en) | 2020-11-13 |
| CN111920494B true CN111920494B (en) | 2024-08-02 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212729934U (en) * | 2020-09-01 | 2021-03-19 | 深圳市世格赛思医疗科技有限公司 | Rod piece sealing structure and puncture outfit |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2294054C (en) * | 1998-04-13 | 2006-09-26 | Applied Medical Resources Corporation | Cone-shaped universal seal having nonuniform surface and seal assembly including same |
| US20040236347A1 (en) * | 1999-03-12 | 2004-11-25 | Olympus Optical Co., Ltd. | Trocar sheath tube |
| CN101940492B (en) * | 2010-09-30 | 2012-01-25 | 苏州天臣国际医疗科技有限公司 | Puncture outfit |
| CN104873251B (en) * | 2013-05-24 | 2017-09-29 | 常州市新能源吻合器总厂有限公司 | Operation puncture outfit |
| CN104083195B (en) * | 2014-07-15 | 2016-07-06 | 山东威瑞外科医用制品有限公司 | A kind of microtrauma puncture device |
| CN105662550B (en) * | 2016-03-09 | 2018-01-05 | 天津优外医疗器材制造有限公司 | Puncturing lever improved structure on puncture outfit |
| CN105982704B (en) * | 2016-07-05 | 2020-10-09 | 江苏风和医疗器材股份有限公司 | Seal cover and puncture outfit with same |
| CN108354638B (en) * | 2018-03-30 | 2024-06-18 | 天津瑞奇外科器械股份有限公司 | Sealing assembly for puncture sleeve, puncture sleeve and puncture device |
| CN110495934B (en) * | 2019-09-20 | 2024-09-03 | 江苏健瑞宝医疗科技股份有限公司 | Fisheye valve, puncture sealing assembly and puncture outfit |
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| CN212729934U (en) * | 2020-09-01 | 2021-03-19 | 深圳市世格赛思医疗科技有限公司 | Rod piece sealing structure and puncture outfit |
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