CN215351106U - Blood perfusion device - Google Patents
Blood perfusion device Download PDFInfo
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- CN215351106U CN215351106U CN202120237245.1U CN202120237245U CN215351106U CN 215351106 U CN215351106 U CN 215351106U CN 202120237245 U CN202120237245 U CN 202120237245U CN 215351106 U CN215351106 U CN 215351106U
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Abstract
The utility model relates to the field of medical instruments, and provides a blood perfusion device which comprises a main body structure and a cover cap, wherein the main body structure is provided with a first cylinder and a second cylinder which are suspended in the positive direction of a first direction and have coincident axes, and the first cylinder is arranged at the radial inner side of the second cylinder at intervals; the cap is provided with an end part and a third cylinder, the third cylinder is suspended from the end part along the negative direction of the first direction, the third cylinder is arranged between the first cylinder and the second cylinder, and the third cylinder is in threaded connection with the second cylinder; the cap comprises a cap body and a sealing element which are connected with each other, a limiting structure is arranged at the joint of the cap body and the sealing element, and the limiting structure limits the movement of the sealing element relative to the cap body along a first direction; the sealing element comprises a sealing plug which is inserted into the cylinder cavity of the first cylinder, and the sealing plug is extruded with the inner cylinder wall of the first cylinder. The blood perfusion device has the advantages of simple structure, low processing difficulty, simple and convenient use and operation of the blood perfusion device and low risk of polluting a blood nozzle.
Description
Technical Field
The utility model relates to the field of medical instruments, in particular to a blood perfusion device.
Background
Chinese utility model patent publication No. CN204766761U discloses a seal structure and a blood purifier (blood perfusion device), this scheme adopts elastic sealing gasket 10 and elastic sealing plug 12 to seal the connection of cap 11 and end cover 13, and along the axial direction of blood perfusion device, elastic sealing gasket 10 and elastic sealing plug 12 are all extruded between cap 11 and end cover 13.
In addition, in order to keep the elastic sealing gasket 10 and the elastic sealing plug 12 to have sufficient sealing pressure and avoid the cap 11 from loosening under the action of the extrusion force of the elastic sealing gasket 10 and the elastic sealing plug 12, the floating point 33 is arranged to interfere with the positioning groove 25 for friction, so that the self-locking of the cap 11 is realized, and the good sealing between the cap 11 and the end cover 13 can be ensured.
However, in this solution, due to the arrangement of the floating point 33 and the positioning groove 25, both the screwing and unscrewing difficulty of the cap 11 is large, so that it is not easy for medical staff to manually complete the screwing operation of the cap 11, which brings great inconvenience to the use of the hemoperfusion apparatus, and the arrangement of the floating point 33 and the positioning groove 25 also causes the difficulty in the production and processing of the end cap 13 and the cap 11; on the other hand, in this solution, after the cap 11 is unscrewed, the elastic sealing gasket 10 and the elastic sealing plug 12 may still be held at the blood nozzle of the end cap 13, and at this time, the elastic sealing gasket 10 and the elastic sealing plug 12 need to be additionally removed, which not only results in a complicated operation process, but also may contaminate the blood nozzle.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a blood perfusion device which has good sealing, easy screwing and simple structure.
The utility model provides a blood perfusion device which comprises a main body structure and a cover cap, wherein the main body structure is provided with a first cylinder and a second cylinder which are suspended in the positive direction along the first direction, the axes of the first cylinder and the second cylinder are superposed, the first cylinder is positioned at the radial inner side of the second cylinder, and the first cylinder and the second cylinder are arranged at intervals along the radial direction; the cap is provided with an end part and a third cylinder, the third cylinder is suspended from the end part along the negative direction of the first direction, the third cylinder is arranged between the first cylinder and the second cylinder, and the third cylinder is in threaded connection with the second cylinder; the cap comprises a cap body and a sealing element which are connected with each other, a limiting structure is arranged at the joint of the cap body and the sealing element, the limiting structure limits the sealing element to move along a first direction relative to the cap body, and the end part of the limiting structure is positioned at the cap body; the sealing element comprises a sealing plug which is inserted into the cylinder cavity of the first cylinder, and the sealing plug is extruded with the inner cylinder wall of the first cylinder; and/or the third cylinder is positioned on the cap body, the sealing element comprises a sealing ring extending along the circumferential direction of the third cylinder, the sealing ring is limited on the inner cylinder wall of the third cylinder by a limiting structure, and the sealing ring is extruded between the inner cylinder wall of the third cylinder and the outer cylinder wall of the first cylinder.
From the above, on one hand, the connection between the cap and the main body structure is sealed by adopting the sealing plug and/or the sealing ring, the sealing plug is extruded and sealed with the inner cylinder wall of the first cylinder, and the sealing ring is extruded between the outer cylinder wall of the first cylinder and the inner cylinder wall of the third cylinder, so that the connection strength of the main body structure and the cap in the first direction does not influence the sealing performance between the main body structure and the cap, and the extrusion of the sealing plug/the sealing ring on the cap does not cause the cap to be loosened relative to the main body structure, so that floating points and positioning grooves are not needed to be arranged, the structure of the end cover and the cap is facilitated to be simplified, the processing difficulty of the end cover and the cap is facilitated to be reduced, and the screwing difficulty of the cap is facilitated to be reduced; on the other hand, the position between the sealing plug/sealing ring and the cap body is limited through the limiting structure, so that the sealing plug/sealing ring can be inserted into the barrel cavity of the first barrel along with the screwing of the cap body and can also be withdrawn from the barrel cavity of the first barrel along with the unscrewing of the cap body, and therefore after the cap body is unscrewed by medical personnel, the sealing plug/sealing ring does not need to be detached independently, the use and operation steps of the blood perfusion device are simplified, and the risk of pollution to a blood nozzle is reduced.
Preferably, the end part is provided with a mounting hole, the opening of the mounting hole faces to the negative direction of the first direction, and the mounting hole is opposite to the cylinder cavity of the first cylinder along the first direction; the limiting structure comprises a first limiting protrusion positioned on the wall of the mounting hole and a first limiting groove positioned on the outer peripheral wall of the sealing plug, and the first limiting protrusion is embedded in the first limiting groove; or the limiting structure comprises a second limiting groove positioned on the hole wall of the mounting hole and a second limiting protrusion positioned on the peripheral wall of the sealing plug, and the second limiting protrusion is embedded in the second limiting groove.
Further, the mounting hole penetrates the end portion in the first direction.
Therefore, the assembly operation difficulty of the sealing plug and the cap body is reduced, and the processing difficulty of the first limiting protrusion/the second limiting groove is reduced.
The sealing plug is further provided with a mounting part and a plug part, wherein the mounting part is connected to the positive end of the plug part along the first direction; the first limiting groove is positioned on the peripheral wall surface of the mounting part; the second limiting protrusion is located on the peripheral wall surface of the mounting portion.
Another preferred solution is that the limiting structure comprises a ring groove provided on the inner wall of the third cylinder, the ring groove extends along the circumferential direction, and the sealing ring is limited in the ring groove.
In a further preferred embodiment, the sealing plug and the third cylinder are formed as a single piece as a sealing element.
Still preferably, the seal is an interference fit with the cap.
In another preferred embodiment, the cap further has a fourth cylinder that overhangs from the end portion in the negative direction of the first direction, the fourth cylinder is located radially outside the third cylinder, the fourth cylinder is spaced from the third cylinder in the radial direction, and the second cylinder is located between the third cylinder and the fourth cylinder.
Therefore, the screwing difficulty of the cap can be further reduced.
In a further preferred embodiment, the sealing element is made of silicone material.
In a further preferred embodiment, the cap body is made of polycarbonate material.
Drawings
FIG. 1 is a partial cross-sectional view of a first embodiment of a hemoperfusion cartridge of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a partial cross-sectional view of an alternative embodiment of the hemoperfusion cartridge of the present invention shown in the connection of the cap and end cap;
FIG. 4 is a partial cross-sectional view of a second embodiment of the hemoperfusion cartridge of the present invention at the connection of the cap and end cap;
FIG. 5 is a partial cross-sectional view of an alternative embodiment of the hemoperfusion cartridge of the present invention shown in FIG. 5, taken at the junction of the cap and the end cap
FIG. 6 is a partial cross-sectional view of a third embodiment of the hemoperfusion cartridge of the present invention at the connection of the cap and end cap.
Detailed Description
The first embodiment is as follows:
referring to fig. 1, the hemoperfusion apparatus of the present embodiment includes a main body structure and a cap 103, the main body structure includes an adsorption column 101 and an end cap 102, the end cap 102 is fixedly connected to a forward end of the adsorption column 101 along a first direction, the forward direction of the first direction is shown by an arrow Z in fig. 1, a connection scheme of the end cap 102 and the adsorption column 101 may be set by referring to the prior art, for example, by referring to a scheme with a publication number of CN204766761U, which is not described herein again.
Referring to fig. 2, the end cap 102 has a first cylinder 121 and a second cylinder 122 suspended in a forward direction along a first direction at the blood nozzle, axes of the first cylinder 121 and the second cylinder 122 are coincident and both extend along the first direction, the first cylinder 121 is located at a radial inner side of the second cylinder 122, and the first cylinder 121 and the second cylinder 122 are arranged at a radial interval.
The cap 103 includes a cap body 131 and a sealing plug 132, the cap body 131 has an end portion 1311 and a third cylinder 1312, the third cylinder 1312 overhangs from the end portion 1311 in the negative direction of the first direction, the end portion 1311 is provided with an installation hole 13111 penetrating in the first direction, a cross-sectional profile of a normal line of the installation hole 13111 in the first direction is circular, an axis of the installation hole 13111 coincides with an axis of the third cylinder 1312, and a hole wall surface of the installation hole 13111 and an inner cylinder wall surface of the third cylinder 1312 are located on the same cylindrical surface.
The wall of the mounting hole 13111 has a first stopper protrusion 13112 protruding radially inward, and the first stopper protrusion 13112 is an annular protrusion extending in the circumferential direction of the mounting hole 13111.
The sealing plug 132 has a mounting portion 1321 and a plug portion 1322, the mounting portion 1321 is connected to a forward end of the plug portion 1322 along a first direction, a cross-sectional outer contour of a normal line of the mounting portion 1321 along the first direction is circular, a cross-sectional outer contour of a normal line of the plug portion 1322 along the first direction is circular, a center line of the mounting portion 1321 and a center line of the plug portion 1322 are collinear, a first limit groove is formed in the outer periphery of the mounting portion 1321, the first limit groove is recessed inward in a radial direction, and the first limit groove is an annular groove extending in a circumferential direction of the mounting portion 1321.
The mounting portion 1321 is embedded in the mounting hole 13111, the outer peripheral wall of the mounting portion 1321 is matched with the hole wall of the mounting hole 13111, the first limiting protrusion 13112 is embedded in the first limiting groove, the plug portion 1322 extends into the cylinder cavity of the third cylinder 1312, and the first limiting protrusion 13112 and the first limiting groove of the embodiment form a limiting structure.
The inner wall of the second cylinder 122 is provided with a first thread, the outer wall of the third cylinder 1312 is provided with a second thread matched with the first thread, the third cylinder 1312 is installed between the first cylinder 121 and the second cylinder 122, the third cylinder 1312 is in threaded connection with the second cylinder 122, the plug part 1322 is inserted into the cylinder cavity of the first cylinder 121, the plug part 1322 is in compression sealing with the inner wall of the first cylinder 121, and the axes of the first cylinder 121, the second cylinder 122, the third through hole 1312 and the sealing plug 132 are collinear.
On one hand, since the plug 1322 is pressed and sealed with the inner cylindrical wall of the first cylinder 121 in the present embodiment, and the pressing force between the plug 1322 and the first cylinder 121 is along the radial direction of the first cylinder 121, there is no need to press the plug 1322 through the cap 103 in the first direction to ensure the sealing performance between the plug 1322 and the first cylinder 121, and certainly, the connection between the cap 103 and the end cap 102 is not loosened due to the pressing force between the plug 1322 and the first cylinder 121, so that a floating point and a positioning groove in the CN204766761U scheme are not required to be provided in the present embodiment, which is beneficial to simplifying the structures of the end cap 102 and the cap 103, reducing the difficulty in screwing the cap 103, and reducing the processing difficulty of the end cap 102 and the cap 103, and the hemoperfusion apparatus of the present embodiment has a simple structure, a low processing difficulty and is convenient to use; on the other hand, since the sealing plug 132 and the cap body 131 of the embodiment are limited by the first limiting groove and the first limiting protrusion 13112, the sealing plug 132 can be inserted into the cylinder cavity of the first cylinder 121 along with the screwing of the cap body 131, and can also be withdrawn from the cylinder cavity of the first cylinder 121 along with the unscrewing of the cap body 131, so that after the cap body 131 is unscrewed, the sealing plug 132 can be detached from the end cover 102 along with the cap body 131, the medical staff does not need to detach the sealing plug 132 alone, which is beneficial to simplifying the operation steps of the hemoperfusion apparatus, and reducing the risk of the blood nozzle being polluted.
The first stopper protrusion 13112 of this embodiment is located on the wall of the mounting hole 13111, if the mounting hole 13111 is a blind hole that opens in the negative first direction, the sealing plug 132 needs to be fitted to the mounting hole 13111 through the cylinder chamber of the third cylinder 1312 from the negative side of the third cylinder 1312 in the first direction, it is not easy to ensure that the first position-limiting protrusion 13112 and the first position-limiting groove are matched in place, which results in a difficult assembly of the cap body 131 and the sealing plug 132, and the difficulty of processing the first position-limiting protrusion 13112 is high, so that the embodiment arranges the mounting hole 13111 as a through hole penetrating the end portion 1311 along the first direction, which is not only beneficial to reducing the difficulty of processing the first position-limiting protrusion 13112, moreover, when the cap body 131 and the sealing plug 132 are assembled, the sealing plug 132 can be installed into the installation hole 13111 from the first direction positive side of the cap body 131 along the first direction negative side, which is beneficial to reducing the difficulty of assembling the sealing plug 132 and the cap body 131.
Specifically, the sealing plug 132 is made of a silicone material, for example, the sealing plug 132 is made of silicone rubber.
Specifically, the cap body 131 is made of a polycarbonate material.
Preferably, the mounting portion 1321 has an interference fit with the wall of the mounting hole 13111. This is beneficial to enhance the strength of the fit connection between the sealing plug 132 and the cap 131, and further beneficial to ensure that the sealing plug 132 advances and retreats synchronously with the cap 131 in the first direction.
Alternatively, in other embodiments of the present invention, the cross-sectional profile shape of the normal of the mounting hole 13111 along the first direction and the cross-sectional profile shape of the normal of the mounting portion 1321 along the first direction may also be adjusted to other shapes, such as a square, a triangle, etc., and it is of course preferable to adopt the embodiment in which the cross-sectional profile shapes of the mounting hole 13111 and the mounting portion 1321 are both set to be circular, which is favorable for reducing the difficulty of assembling the sealing plug 132 with the cap 131 and facilitating the fitting of the sealing plug 132 with the cap 131.
Alternatively, in other embodiments of the present invention, the first limiting protrusion 13112 and the first limiting groove may not be annular, for example, the first limiting protrusion 13112 is disposed to extend and distribute along the circumferential direction of the mounting hole 13111 in two or more segments, and the first limiting groove is correspondingly disposed to extend and distribute along the circumferential direction of the mounting portion 1321 in two or more segments, and each segment of the first limiting protrusion 13112 is embedded in each segment of the first limiting groove in one-to-one correspondence.
Alternatively, in other embodiments of the present invention, a second limiting protrusion may be disposed on the outer periphery of the mounting portion 1321, and a second limiting groove may be disposed on the hole wall of the mounting hole 13111, the second limiting protrusion is embedded in the second limiting groove, and the cooperation between the second limiting protrusion and the second limiting groove may be performed with reference to the cooperation between the first limiting protrusion 13112 and the first limiting groove, which is not described herein again.
Optionally, in another embodiment of the present invention, referring to fig. 3, the cap 231 further has a fourth cylinder 2313, the fourth cylinder 2313 is suspended from the end 2311 in the negative direction of the first direction, the fourth cylinder 2313 is located radially outside the third cylinder 2312, the fourth cylinder 2313 is radially spaced apart from the third cylinder 2312, and the second cylinder 222 is located between the third cylinder 2312 and the fourth cylinder 2313. This is beneficial to increasing the force application area when the medical staff screws the cap body 231, and further beneficial to reducing the difficulty of screwing.
Example two:
referring to fig. 4, in the present embodiment, the mounting hole 13111 and the first limiting protrusion 13112 provided on the end portion 1311 in the first embodiment are eliminated, and the sealing ring 333 is used instead of the sealing plug 132 in the first embodiment.
The position-limiting structure of this embodiment is a ring groove 33121 formed in the inner wall of the third cylinder 3312, the ring groove 33121 extends along the circumferential direction of the third cylinder 3312, the sealing ring 333 is embedded in the ring groove 33121, and the sealing ring 333 is pressed between the inner wall of the third cylinder 3312 and the outer wall of the first cylinder 321. Therefore, the sealing performance of the sealing ring 333 does not need extrusion force in the first direction, the sealing ring 333 does not cause loose matching between the cap 303 and the end cover 302, and the sealing ring 333 can also move synchronously in the first direction along with the cap body 331; of course, it is preferable to adopt the solution of the first embodiment, so that when the cap 103 is placed alone, the sealing plug 132 and the cap body 131 can maintain a good connection relationship, and the sealing plug 132 is not easily detached from the cap body 131.
The rest of the present embodiment is the same as the first embodiment.
Of course, referring to fig. 5, in other embodiments of the present invention, a fourth cylinder 4313 may be additionally disposed on the cap 431 to reduce the difficulty in screwing the cap 431, and the manner of disposing the fourth cylinder 4313 in this embodiment is shown in the fourth cylinder 2313 in the embodiment of fig. 3, which is not repeated herein.
Example three:
referring to fig. 6, in the embodiment, the sealing plug 532 and the third cylinder 5312 are provided as an integrally formed sealing member, the diameter of the outer contour of the section of the normal line of the mounting portion 5321 along the first direction is larger than the diameter of the outer contour of the section of the normal line of the third cylinder 5312 along the first direction, and the third cylinder 5312 is suspended from the mounting portion 5321 in the negative direction of the first direction.
The cap 531 of this embodiment has an end portion 5311 and a fourth cylinder 5313, and the manner of engaging the end portion 5311 with the mounting portion 5321 and the manner of disposing the fourth cylinder 5313 can be both set as described in the first embodiment, and will not be described again here.
The rest of the present embodiment is the same as the first embodiment.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the utility model are possible to those skilled in the art, without departing from the spirit and scope of the utility model.
Claims (10)
1. The hemoperfusion device comprises a main body structure and a cover cap, wherein the main body structure is provided with a first cylinder and a second cylinder which are suspended and extended along the positive direction of a first direction, the axis of the first cylinder is superposed with that of the second cylinder, the first cylinder is positioned on the radial inner side of the second cylinder, and the first cylinder and the second cylinder are arranged at intervals along the radial direction;
the cap is provided with an end part and a third cylinder, the third cylinder is suspended from the end part along the negative direction of the first direction, the third cylinder is arranged between the first cylinder and the second cylinder, and the third cylinder is in threaded connection with the second cylinder;
the method is characterized in that:
the cap comprises a cap body and a sealing element which are connected with each other, the cap body and the sealing element are provided with a limiting structure at the connection part, the limiting structure limits the sealing element to move relative to the cap body along the first direction, and the end part is positioned on the cap body;
the sealing element comprises a sealing plug which is inserted into the cylinder cavity of the first cylinder, and the sealing plug is extruded with the inner cylinder wall of the first cylinder; and/or
The third cylinder is located on the cap body, the sealing element comprises a sealing ring extending along the circumferential direction of the third cylinder, the sealing ring is limited on the inner cylinder wall of the third cylinder by the limiting structure, and the sealing ring is extruded between the inner cylinder wall of the third cylinder and the outer cylinder wall of the first cylinder.
2. The hemoperfusion cartridge of claim 1, wherein:
the end part is provided with a mounting hole, the hole opening of the mounting hole faces the negative direction of the first direction, and the mounting hole is opposite to the cylinder cavity of the first cylinder along the first direction;
the limiting structure comprises a first limiting protrusion positioned on the wall of the mounting hole and a first limiting groove positioned on the outer peripheral wall of the sealing plug, and the first limiting protrusion is embedded in the first limiting groove; or
The limiting structure comprises a second limiting groove formed in the hole wall of the mounting hole and a second limiting protrusion arranged on the peripheral wall of the sealing plug, and the second limiting protrusion is embedded in the second limiting groove.
3. The hemoperfusion cartridge of claim 2, wherein:
the mounting hole penetrates the end portion in the first direction.
4. The hemoperfusion cartridge of claim 2, wherein:
the sealing plug is provided with a mounting part and a plug part, and the mounting part is connected to the positive end of the plug part along the first direction;
the first limiting groove is positioned on the peripheral wall surface of the mounting part;
the second limiting protrusion is located on the peripheral wall surface of the mounting portion.
5. The hemoperfusion cartridge of claim 1, wherein:
the limiting structure comprises a ring groove arranged on the inner cylinder wall of the third cylinder, the ring groove extends along the circumferential direction, and the sealing ring is limited in the ring groove.
6. The hemoperfusion cartridge of any one of claims 1 to 4, wherein:
the sealing plug and the third cylinder are integrally formed into the sealing element.
7. The hemoperfusion cartridge of any one of claims 1 to 5, wherein:
the sealing element is in interference fit with the cap body.
8. The hemoperfusion cartridge of any one of claims 1 to 5, wherein:
the cap body is further provided with a fourth cylinder which overhangs from an end part in the negative direction of the first direction, the fourth cylinder is located on the radial outer side of the third cylinder, the fourth cylinder and the third cylinder are arranged at intervals in the radial direction, and the second cylinder is located between the third cylinder and the fourth cylinder.
9. The hemoperfusion cartridge of any one of claims 1 to 5, wherein:
the sealing element is made of a silica gel material.
10. The hemoperfusion cartridge of any one of claims 1 to 5, wherein:
the cap body is made of polycarbonate material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120237245.1U CN215351106U (en) | 2021-01-27 | 2021-01-27 | Blood perfusion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120237245.1U CN215351106U (en) | 2021-01-27 | 2021-01-27 | Blood perfusion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215351106U true CN215351106U (en) | 2021-12-31 |
Family
ID=79621797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120237245.1U Active CN215351106U (en) | 2021-01-27 | 2021-01-27 | Blood perfusion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215351106U (en) |
-
2021
- 2021-01-27 CN CN202120237245.1U patent/CN215351106U/en active Active
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