CN204766761U - Seal structure and blood clarifier - Google Patents
Seal structure and blood clarifier Download PDFInfo
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- CN204766761U CN204766761U CN201520443332.7U CN201520443332U CN204766761U CN 204766761 U CN204766761 U CN 204766761U CN 201520443332 U CN201520443332 U CN 201520443332U CN 204766761 U CN204766761 U CN 204766761U
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- 239000008280 blood Substances 0.000 title claims abstract description 88
- 210000004369 blood Anatomy 0.000 title claims abstract description 88
- 238000007789 sealing Methods 0.000 claims abstract description 89
- 230000008878 coupling Effects 0.000 claims abstract description 42
- 238000010168 coupling process Methods 0.000 claims abstract description 42
- 238000005859 coupling reaction Methods 0.000 claims abstract description 42
- 230000002093 peripheral effect Effects 0.000 claims description 41
- 238000001179 sorption measurement Methods 0.000 claims description 19
- 239000003463 adsorbent Substances 0.000 claims description 11
- 238000007667 floating Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 210000004534 cecum Anatomy 0.000 abstract description 6
- 230000009977 dual effect Effects 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 13
- 238000007906 compression Methods 0.000 description 13
- 230000010412 perfusion Effects 0.000 description 8
- 238000012856 packing Methods 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- -1 immunoadsorbent Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- 231100000570 acute poisoning Toxicity 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000008081 blood perfusion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001631 haemodialysis Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000000322 hemodialysis Effects 0.000 description 1
- 230000001951 hemoperfusion Effects 0.000 description 1
- 208000026278 immune system disease Diseases 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 208000017169 kidney disease Diseases 0.000 description 1
- 208000019423 liver disease Diseases 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 208000017520 skin disease Diseases 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- External Artificial Organs (AREA)
Abstract
The utility model discloses seal structure and blood clarifier discloses the seal structure of a blood clarifier and the blood clarifier that has this seal structure, and seal structure is including block, elasticity sealing plug and tube coupling end, this elasticity sealing plug sets up the one end of being close to the end wall at the inside cavity spliced pole inner chamber of block to the opening of the blood mouth served with the tube coupling forms sealed cooperation, the one end near the block end wall at the block annular is provided with the sealed pad of elasticity for the sealed compressed that fills up of elasticity is close to between the terminal surface of end wall at the internal face of end wall and the cavity coupling column of tube coupling end. The utility model discloses a seal structure is dual seal structure, except sealing at the elasticity sealing plug of the cavity spliced pole inner chamber cecum opening to the blood mouth through setting up, still carries out the secondary seal through setting up sealed pad of elasticity of block annular cecum to the block of blood clarifier and the sealed effect between the end cover have been strengthened.
Description
Technical Field
The utility model relates to a blood purification field particularly, relates to a seal structure of blood clarifier and contain the blood clarifier of this kind of seal structure.
Background
Hemoperfusion and hemodialysis are blood purification techniques that have rapidly emerged clinically in recent years, and the treatment categories have been renal diseases, acute poisoning, liver diseases, critical diseases, skin diseases, immunological diseases, and the like. With the improvement of living standard and health consciousness of people, blood purification is widely accepted as a disease treatment mode, and the usage amount of the blood purification is increased every year.
As a medical instrument dedicated to blood purification, an adsorbent for purifying blood is placed in a blood purifier (such as an perfusion device, a dialyzer, or the like). In clinical use, the blood purifier is connected in series in an extracorporeal blood circulation pipeline, and when blood passes through the purifier, the adsorbent adsorbs pathogenic substances in the blood, so that the aim of treating diseases is fulfilled.
Chinese utility model patent CN200820047979 discloses a disposable blood purifier, as shown in fig. 1, the components of the purifier include an adsorption column 7 and two sets of sealing devices 8 for respectively sealing the two axial ports of the adsorption column 7. In the inner tube of the adsorption column 7, various types of adsorbents such as immunoadsorbent, activated carbon adsorbent, resin adsorbent, etc. may be contained according to different therapeutic purposes. As shown in fig. 2 and 3, each set of sealing device 8 is composed of a filter screen 6, a sealing flat gasket 5, an end cover 4, a locking nut 3, a cap 1 and the like. The adsorption column 7, the end cover 4, the locking nut 3 and the cap 1 are all produced by adopting medical Polycarbonate (PC) as raw materials through an injection molding process; the sealing flat gasket 5 and the sealing soft gasket 2 fixed on the cap 1 are both produced by adopting silicon rubber as raw materials through an injection molding process; the screen 6 is usually produced in a woven manner using nylon wire as a raw material.
As shown in fig. 2 and 3, the adsorption column 7 of the purifier has the form of a cylinder 701, the inner tube of which cylinder 701 is hollow, and this hollow portion forms a filter chamber 705 for containing a substance such as a granular adsorbent. A cylindrical abutment ring 702, 703 which expands in the radial direction is provided at each of the axial ends of the cylindrical body 701. Outer peripheral surfaces of the columnar abutment rings 702 and 703 are provided with external threads 704 protruding outward, respectively. The screen 6 is obtained by fixing a nylon woven mesh 602 to the annular frame 601 by chemical bonding, melting, or ultrasonic welding. The sealing flat gasket 5 is a circular ring-shaped rubber ring prepared from silicon rubber.
As shown in fig. 2 to 4, the end cap 4 is a circular plate 401 having a shape corresponding to one of the two axial ends of the adsorption column 7. On one side wall 408 of the circular plate 401 in the axial direction, a cylindrical annular positioning ring 402 is extended coaxially with the circular plate 401. At the radial center of the circular plate 401, a blood nozzle 403 for blood or plasma flow is provided through the circular plate 401. On the side wall 409 of the circular plate 401, which faces axially away from the annular positioning ring 402, the blood nozzle 403 extends axially outwards along the circular plate 401 by a cylindrical abutment column 405 of a predetermined length. Radially around the outer periphery of abutment 405 is a positioning post 404 coaxial with circular plate 401. The outer cylinder wall of positioning post 404 is approximately in the form of a cone having a larger diameter near the end of side wall 409. The inner cylinder wall of positioning post 404 is in the form of a cylindrical cavity. The positioning post 404 starts from a side wall 409 and extends in the same direction as the docking post 405 by about the same length as the docking post 405, and has an internal thread 407 on its inner cylindrical wall. On the radial periphery of the positioning post 404, on the side wall 409, there are provided several individual spherical floats 406, these spherical floats 406 forming an annular ring around the positioning post 404 coaxial with the circular plate 401.
As shown in fig. 2 and 3, the lock nut 3 is a cap having a cylindrical skirt 303, and on an end cap 302 for closing the corresponding container, a circular transition hole 304 penetrating the end cap 302 and coaxial with the lock nut 3 is provided at a radially intermediate position thereof. On the inner peripheral surface of the skirt 303, an internal thread 305 is provided to realize a knob engagement with the external thread 704 of the aforementioned suction column 7.
As shown in fig. 4 to 6, the cap 1 is a lid having a cylindrical peripheral wall 105, one end of which in the axial direction is in an open state and accordingly constitutes an open port 107, and the opposite end of which is closed by an end wall 106. Inside the cap 1, a hollow cylindrical sealing post 103 extends from the end wall 106 at a radially intermediate position in the same direction as the peripheral wall 105. A continuous external thread 104 is provided on the outer peripheral surface of the sealing post 103 in order to snap-fit the cap 1 onto the positioning post 404 by means of engagement between the external thread 104 and the aforementioned internal thread 407, and in this snap-fit state, the positioning post 404 is held in a position radially interposed between the peripheral wall 105 and the sealing post 103. On an end surface of the peripheral wall 105 extending in the radial direction corresponding to the opening 107 of the cap 1, a plurality of independent positioning grooves 102 recessed in the axial direction of the cap 1 are provided. These positioning grooves 102 form an annular ring coaxial with the cap 1 along the circumferential direction of the peripheral wall 105. In a state where the cap 1 is fastened to the positioning post 404, the radial position of the positioning groove 102 corresponds to the spherical float 406, so that the cap 1 is positioned on the positioning post 404 along the circumferential direction of the positioning post 404 by pressing the spherical float 406 into the positioning groove 102. Thus, when the cap 1 is screwed onto the positioning post 404, the cap 1 is difficult to fall off from the positioning post 404 by reverse rotation without a large rotation force due to the spherical floating point 406 being pressed into the positioning groove 102. The sealing cushion 2 is fixed in the inner cavity 101 of the sealing post 103 and on the side of the end wall 106 in an interference contact manner. The seal cushion 2 is a silicone rubber block with a tapered contact block 202 at the center of the axial end face of the cylindrical base block 201. When the sealing cushion 2 is fixed in the inner cavity of the sealing post 103, the conical tip of the conical contact block 202 faces away from the end wall 106, so that when the cap 1 is screwed onto the positioning post 404, the conical contact block 202 seals against the docking post 405, so that the blood nozzle 403 is sealed.
In the blood purifier having the above-described structure, the space between the blood nozzle 403 and the cap 1 is sealed by the seal cushion 2 only at the outlet of the blood nozzle 403, so that the blood nozzle of the blood purifier may be infected with bacteria, which poses a certain safety risk, and the compression amount of the seal cushion 2 cannot be controlled, which may easily cause a sealing failure.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve a technical problem lie in providing a seal structure of blood clarifier to the above-mentioned defect of prior art to strengthen the block to the sealed effect of blood clarifier, reduce the risk that the bacterium got into the blood clarifier.
Another technical problem to be solved by the present invention is to provide a blood purifier with the above-mentioned sealing structure.
In order to solve the first technical problem, the utility model provides a sealing structure of a blood purifier, which comprises a cap, an elastic sealing plug and a pipeline connecting end; the nut cap comprises a peripheral wall and an end wall for closing one axial end of the peripheral wall, the other axial end of the peripheral wall is provided with a nut cap opening, a hollow connecting column extending from the end wall to the nut cap opening is arranged inside the nut cap, one end, far away from the end wall, of an inner cavity of the hollow connecting column is provided with a connecting column opening, and a nut cap ring groove is formed between the hollow connecting column and the peripheral wall; the pipeline connecting end comprises a blood nozzle extending along the axial direction of the cover cap and a hollow coupling column positioned on the periphery of the blood nozzle, a connecting end ring groove is formed between the blood nozzle and the hollow coupling column, and the internal thread of the hollow coupling column is matched with the external thread of the hollow connecting column, so that the hollow connecting column is positioned in the connecting end ring groove; the elastic sealing plug is arranged at one end, close to the end wall, of the inner cavity of the hollow connecting column and is in sealing fit with the opening of the blood nozzle; and one end of the cap ring groove, which is close to the end wall, is provided with an elastic sealing gasket, so that the elastic sealing gasket is compressed between the inner wall surface of the end wall and the end surface of the hollow coupling column, which is close to the end wall.
It is visible by the above-mentioned scheme, the utility model discloses a seal structure passes through the coupling of block and pipe connection end, makes the inside and the outside environment isolation of blood clarifier, and this seal structure is double seal structure, at first seals the opening of blood mouth through the elastic sealing plug that sets up at cavity spliced pole inner chamber cecum, carries out secondary seal through the elastic sealing pad that sets up at block annular cecum simultaneously to the sealed effect between block and the end cover of blood clarifier has been strengthened.
The sealing structure further comprises an end cover, and the end cover comprises an end cover body and the pipeline connecting end.
A further technical scheme is that one side of the end cover close to the cap is provided with a limiting step for limiting the axial relative position between the cap and the end cover, and the limiting step is arranged close to the hollow coupling column. The limiting step can limit the axial relative position between the cap and the end cover, so that the elastic sealing gasket can be prevented from generating excessive compression deformation, and the problem that the cap cannot be opened due to the fact that the cap is screwed too tightly can be effectively prevented.
In one embodiment, the stop step is an annular step surrounding the hollow coupling post, which facilitates control of the amount of compression of the gasket.
In one embodiment, the limiting step comprises a plurality of bosses which are distributed at intervals around the hollow coupling column, so that the compression amount of the sealing gasket can be controlled, and meanwhile, the cost is saved.
The end face, far away from the end wall, of the peripheral wall comprises an inner side end face and an outer side end face which are located at different heights, the outer side end face is far away from the end wall, the inner side end face is in contact with the end face of the limiting step, the outer side end face is in contact with the outer side surface, facing the cover cap, of the end cover body, and the height of the limiting platform is not smaller than the height difference between the inner side end face and the outer side end face.
The technical scheme is that a positioning groove is formed in the end face of the outer side, a floating point surrounding the hollow coupling column is arranged on the surface of the outer side of the end cover body, and the floating point is matched with the positioning groove to circumferentially position the cap. After the nut cap is screwed, the positioning groove is in abutting friction with the floating point, so that the nut cap can be prevented from being loosened by autorotation, and a self-locking effect is achieved.
The technical scheme is that the outer peripheral surface of the peripheral wall is provided with anti-slip threads to increase friction force, so that an operator can conveniently unscrew and tighten the cap by hands without any matching equipment.
In order to solve the second technical problem, the utility model provides a blood purifier, which comprises an adsorption column and a sealing device for respectively sealing two axial ports of the adsorption column, wherein the adsorption column is internally provided with an adsorption chamber for containing an adsorbent, and the sealing device is provided with a sealing structure which comprises a cap, an elastic sealing plug and a pipeline connecting end; the cap comprises a peripheral wall and an end wall for closing one axial end of the peripheral wall, the other axial end of the peripheral wall is provided with a cap opening, a hollow connecting column extending from the end wall to the cap opening is arranged inside the cap, one end, far away from the end wall, of an inner cavity of the hollow connecting column is provided with a connecting column opening, and a cap annular groove is formed between the hollow connecting column and the peripheral wall; the pipeline connecting end comprises a blood nozzle extending along the axial direction of the cover cap and a hollow coupling column positioned on the periphery of the blood nozzle, a connecting end ring groove is formed between the blood nozzle and the hollow coupling column, and the internal thread of the hollow coupling column is matched with the external thread of the hollow connecting column, so that the hollow connecting column is positioned in the connecting end ring groove; the elastic sealing plug is arranged at one end, close to the end wall, of the inner cavity of the hollow connecting column and is in sealing fit with the opening of the blood nozzle; and one end of the cap ring groove, which is close to the end wall, is provided with an elastic sealing gasket, so that the elastic sealing gasket is compressed between the inner wall surface of the end wall and the end surface of the hollow coupling column, which is close to the end wall.
It is apparent from the above-mentioned scheme that the utility model discloses blood clarifier's seal structure passes through the coupling of block and end cover, makes blood clarifier's inside and outside environment keep apart, and this seal structure is double seal structure, seals the opening of blood mouth at first through the elastic sealing plug that sets up at cavity spliced pole inner chamber cecum, carries out secondary seal through the elastic sealing pad that sets up at block annular cecum simultaneously to the sealed effect between block and the end cover of blood clarifier has been strengthened.
Drawings
Fig. 1 is a perspective view of a conventional blood purifier.
Fig. 2 is an exploded perspective view of the first blood purifier shown in fig. 1.
Fig. 3 is an exploded perspective view of the blood purifier shown in fig. 1.
Fig. 4 is a schematic view of the cap and end cap of the blood purifier shown in fig. 1.
FIG. 5 is an exploded perspective view of the cap structure of the blood purifier shown in FIG. 1.
Fig. 6 is a cross-sectional view of the cap of the blood purifier shown in fig. 1.
Fig. 7 is a perspective view of a sealing structure of the blood purifier of the present invention.
Fig. 8 is a plan view of the sealing structure shown in fig. 7.
Figure 9 is an exploded view of the seal structure shown in figure 7.
Figure 10 is a top view of the sealing structure shown in figure 7.
Figure 11 is a cross-sectional view a-a of the seal structure shown in figure 10.
Fig. 12 is a cross-sectional view of the cap in the seal arrangement of fig. 10.
Fig. 13 is a cross-sectional view of the end cap in the seal structure of fig. 10.
Detailed Description
Reference will now be made in detail to various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below. While the present invention will be described in conjunction with the exemplary embodiments, it will be understood that the invention is not limited to these exemplary embodiments. On the contrary, the present invention includes not only these embodiments but also various modifications and improvements.
The blood purifier of the utility model comprises a perfusion device, a plasma separator, a dialyzer and the like. The blood purifiers comprise a cylinder for containing media and a sealing device for sealing the cylinder. In this embodiment, taking the blood perfusion apparatus as an example, the structure of the perfusion apparatus is substantially similar to that of the perfusion apparatus in the prior art shown in fig. 1 to 6, and also includes an adsorption column and a sealing device for respectively sealing two axial ports of the adsorption column, where the adsorption column has an adsorption chamber therein, and the adsorption chamber can contain various types of adsorbents, such as activated carbon adsorbent, resin adsorbent, and the like, according to different therapeutic purposes.
The closure has a sealing arrangement, as shown in figures 7 to 9, which comprises a cap 11, an elastic sealing plug 12, an elastic sealing gasket 10 and an end cap 13. The cap 11 is a rigid plastic part, and is manufactured by injection molding using medical Polycarbonate (PC) or polypropylene (PP) as a raw material, the elastic sealing plug 12 and the elastic sealing gasket 10 are manufactured by injection molding using silicone rubber as a raw material, and the elastic sealing gasket 10 is an O-ring, for example.
As shown in fig. 12, the cap 11 includes a peripheral wall 14 and an end wall 15 closing one axial end of the peripheral wall 14, the other axial end of the peripheral wall 14 has a cap opening 16, a hollow connecting post 17 extending from the end wall 15 toward the cap opening 16 is provided inside the cap 11, one end of an inner cavity 18 of the hollow connecting post 17 away from the end wall 15 has a connecting post opening 19, a cap annular groove 20 is formed between the hollow connecting post 17 and the peripheral wall 14, and an outer peripheral surface of the hollow connecting post 17 has an external thread 21. The peripheral surface of the peripheral wall 14 is provided with anti-slip threads 22 to increase friction so that the operator can easily unscrew and tighten the cap 11 by hand without the aid of any auxiliary equipment. The end surface of the peripheral wall 14 facing away from the end wall 15 comprises an inner end surface 23 and an outer end surface 24 at different heights, wherein the outer end surface 24 is located further away from the end wall 15 than the inner end surface 23, and the outer end surface 24 is provided with a positioning groove 25.
As shown in fig. 13, the end cap 13 includes an end cap body 26, a blood nozzle 27 extending from the end cap body 26 in an axial direction, and a hollow coupling column 28 located at the periphery of the blood nozzle 27, wherein a connection end ring groove 29 is formed between the blood nozzle 27 and the hollow coupling column 28, and an inner wall surface of the hollow coupling column 28 has an internal thread 30. The end cap 13 forms a stop step 31 on an outer surface 32 thereof adjacent the hollow coupling post 28. in one embodiment, the stop step 31 is formed as an annular step surrounding the hollow coupling post 28. In addition, the limiting step 31 may be a plurality of bosses distributed around the hollow coupling column 28 at intervals.
As shown in FIG. 11, when the cap 11 is coupled to the end cap 13, the internal threads 30 of the hollow coupling post 28 mate with the external threads 21 of the hollow connecting post 17 such that the hollow connecting post 17 is positioned within the connecting end ring groove 29. The elastic sealing plug 12 is arranged at one end of the inner cavity 18 of the hollow connecting column 17 close to the end wall 15 and forms sealing fit with the opening of the blood nozzle 27; meanwhile, the elastic packing 10 is disposed at one end of the cap ring groove 20 close to the end wall 15, so that the elastic packing 10 is compressed between the inner wall surface of the end wall 15 and the end surface of the hollow coupling post 28 remote from the end cap body 26.
As shown in fig. 11 to 13, the height h of the limiting platform2Not less than the height difference h between the inner end surface 23 and the outer end surface 24 of the peripheral wall 14 of the cap 11, d when the elastic seal 10 is not compressed, and h when the inner wall surface of the end wall 15 of the cap 11 is not compressed0The height of the hollow coupling column 28 is h1The thickness of the elastic packing 10 after compression is d0=（h0+h2-h1) The compression amount of the elastic packing 10 is (d-d)0) Compression ratio of (d-d)0) D, therefore, the height h of the limiting platform can be controlled according to the characteristics of the hardness, the shape and the like of the elastic sealing gasket2The compression amount and the compression ratio of the elastic packing 10 are controlled so as to satisfy the sealing action of the elastic packing. For example, the compression ratio of the flat elastic sealing gasket is 30-50%, the compression ratio of the O-ring is 10-30%, and the compression ratio of the elastic sealing gasket 10 in this embodiment is 10-20% for the O-ring.
It can be seen from the above scheme that, this seal structure passes through the coupling of block 11 and end cover 13, make the inside of perfusion ware keep apart with outside environment, this seal structure is double seal structure, at first seal the opening of blood mouth 27 through the elastic sealing plug 12 that sets up at the blind end of hollow connecting column 17 inner chamber, carry out secondary seal through the elastic sealing pad 10 that sets up at the blind end of block annular groove 20 simultaneously, because blood purifiers such as perfusion ware are through transporting before dispatching from the factory to using, processes such as storage, probably lead to elastic sealing plug 12 ageing scheduling problem and the sealed between the blood mouth to be destroyed, realize the secondary seal to perfusion ware through the cooperation of pressure of elastic sealing pad 10 and hollow coupling column 28 terminal surface. On the other hand, since bacteria may enter between the coupling threads between the peripheral wall 14 and the hollow connecting post 17 during transportation and storage, harmful substances such as bacteria are isolated between the peripheral wall 14 and the hollow coupling post 28 by the second resealing action of the elastic sealing gasket 10, and bacteria are prevented from entering the blood tap through the coupling threads between the peripheral wall 14 and the hollow connecting post 17 to contaminate the sterile environment around the blood tap. The cap and the end cover of the blood purifier such as the perfusion device are sealed by the elastic sealing plug 12 and the elastic sealing gasket 10, so that the sealing effect between the cap and the end cover of the blood purifier is enhanced, the good sealing property and the sterile environment of the blood purifier in the period of validity are ensured, and the product failure or the medical hidden trouble caused by the sealing problem are avoided.
The outer end surface 24 of the peripheral wall 14 of the cap 11 is in contact with the outer surface 32 of the end cover body 26 facing the cap 11, and the end surface of the limit step 31 is in contact with the inner end surface 23 of the peripheral wall 14 of the cap 11, so that the axial relative position between the cap 11 and the end cover 13 is limited, excessive compression deformation of the elastic sealing gasket 10 can be avoided, the problem that the cap 11 cannot be opened due to over-tightening of the cap 11 can be effectively prevented while sealing between the cap and the end cover is met, and the operation convenience of medical staff is improved.
As shown in fig. 9 and 12, a float 33 surrounding the hollow coupling post 28 is also provided on the outer side surface 32 of the end cap body 26, the float 33 engaging with the positioning groove 25 provided on the outer side end surface 24 of the peripheral wall 14 to circumferentially position the cap 11. After the cap 11 is screwed, the positioning groove 25 and the floating point 33 are in contact friction, so that the cap 11 can be prevented from rotating and loosening, and a self-locking effect is achieved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, for example, the blood nozzle and the hollow coupling column form a pipeline connecting end, and the pipeline connecting end can be directly formed on the end wall of the blood purifier column, that is, the end of the blood purifier column is not provided with an end cover. These all belong to the protection scope of the present invention.
Claims (9)
1. The sealing structure of the blood purifier comprises a cap, an elastic sealing plug and a pipeline connecting end; wherein,
the cap comprises a peripheral wall and an end wall for closing one axial end of the peripheral wall, the other axial end of the peripheral wall is provided with a cap opening, a hollow connecting column extending from the end wall to the cap opening is arranged inside the cap, one end, far away from the end wall, of an inner cavity of the hollow connecting column is provided with a connecting column opening, and a cap annular groove is formed between the hollow connecting column and the peripheral wall;
the pipeline connecting end comprises a blood nozzle extending along the axial direction of the cover cap and a hollow coupling column positioned on the periphery of the blood nozzle, a connecting end ring groove is formed between the blood nozzle and the hollow coupling column, and the internal thread of the hollow coupling column is matched with the external thread of the hollow connecting column, so that the hollow connecting column is positioned in the connecting end ring groove;
the elastic sealing plug is arranged at one end, close to the end wall, of the inner cavity of the hollow connecting column and is in sealing fit with the opening of the blood nozzle; the method is characterized in that:
and one end of the cap ring groove, which is close to the end wall, is provided with an elastic sealing gasket, so that the elastic sealing gasket is compressed between the inner wall surface of the end wall and the end surface of the hollow coupling column, which is close to the end wall.
2. The sealing structure of the blood purifier according to claim 1, wherein: the sealing structure further comprises an end cover, and the end cover comprises an end cover body and the pipeline connecting end.
3. The sealing structure of the blood purifier according to claim 2, wherein: the end cover is provided with a limiting step used for limiting the axial relative position between the cap and the end cover on one side close to the cap, and the limiting step is arranged close to the hollow coupling column.
4. The sealing structure of the blood purifier according to claim 3, wherein: the limiting step is a circular ring-shaped step surrounding the hollow coupling column.
5. The sealing structure of the blood purifier according to claim 3, wherein: the limiting step comprises a plurality of bosses which are distributed around the hollow coupling column at intervals.
6. The sealing structure of the blood purifier according to any one of claims 3 to 5, wherein: the end face, far away from the end wall, of the peripheral wall comprises an inner end face and an outer end face, wherein the inner end face and the outer end face are located on different heights, the outer end face is far away from the end wall, the inner end face is in contact with the end face of the limiting step, and the outer end face is in contact with the outer side surface, facing the cover cap, of the end cover body; the height of the limiting platform is not less than the height difference between the inner side end face and the outer side end face.
7. The sealing structure of the blood purifier according to claim 6, wherein: the end cover comprises an end cover body and is characterized in that a positioning groove is formed in the end face of the outer side, a floating point surrounding the hollow coupling column is arranged on the surface of the outer side of the end cover body, and the floating point is matched with the positioning groove to circumferentially position the cover cap.
8. The sealing structure of the blood purifier according to claim 1, wherein: the peripheral surface of the peripheral wall is provided with anti-skid grains.
9. Blood purifier, including the adsorption column and the closing device who seals this adsorption column axial both ends mouth respectively, have the adsorption chamber that holds the adsorbent in the adsorption column, its characterized in that: the closure device comprising a sealing structure according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520443332.7U CN204766761U (en) | 2015-06-25 | 2015-06-25 | Seal structure and blood clarifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520443332.7U CN204766761U (en) | 2015-06-25 | 2015-06-25 | Seal structure and blood clarifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204766761U true CN204766761U (en) | 2015-11-18 |
Family
ID=54506900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520443332.7U Active CN204766761U (en) | 2015-06-25 | 2015-06-25 | Seal structure and blood clarifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204766761U (en) |
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2015
- 2015-06-25 CN CN201520443332.7U patent/CN204766761U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
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Address after: 519080 Zhuhai hi tech Zone No. six road, Guangdong Province, 98 Patentee after: Jianfan Biotechnology Group Co., Ltd. Address before: 519080 Zhuhai hi tech Zone No. six road, Guangdong Province, 98 Patentee before: Jafron Biomedical Co., Ltd. |