CN219049772U

CN219049772U - Blood perfusion device

Info

Publication number: CN219049772U
Application number: CN202223237247.4U
Authority: CN
Inventors: 苑兴明
Original assignee: Zhuhai Tianze Mold Injection Co ltd
Current assignee: Zhuhai Tianze Mold Injection Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-05-23
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a blood perfusion device, comprising: a cylinder; the sealing rings are inserted into the cylinder, the sealing rings are arranged at the two ends of the cylinder, and the sealing rings extend out of the cylinder along the axial direction of the cylinder; the two end covers are provided with an inserting part and a side plate, the inserting part is inserted into the inner ring of the corresponding sealing ring, and the side plate is abutted against the part of the sealing ring protruding out of the cylinder body; the locking nuts are arranged in two and are in threaded connection with the cylinder body, and the locking nuts are used for compressing the corresponding end covers. The sealing ring is inserted into the cylinder, then the end cover is connected with the cylinder and the sealing ring, and because the side plate is abutted on the part of the sealing ring protruding out of the cylinder, a plurality of surfaces of the sealing ring are abutted with the cylinder or the end cover to form a plurality of sealing surfaces, so that the sealing effect is enhanced and the product percent of pass is improved when high-temperature steam is sterilized.

Description

Blood perfusion device

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a blood perfusion device.

Background

The blood perfusion device is used for blood purification.

The sealing between the end cover and the cylinder of the current blood perfusion device in the market mainly comprises the steps of placing a sheet silica gel pad between the top end surface and the bottom surface of the cylinder of the perfusion device, extruding the silica gel pad through a lock nut to enable the top end surface and the bottom surface of the cylinder to realize sealing of an upper sealing surface and a lower sealing surface, and when the blood perfusion device is produced, the sealing mode is easy to leak after liquid in the blood perfusion device is vaporized under a high-temperature steam sterilization process, and the lock nut is easy to crack, so that a higher product reject ratio is caused.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the blood perfusion device, which can ensure the tightness between the end cover and the cylinder body and improve the product qualification rate during production.

According to an embodiment of the first aspect of the present utility model, a blood perfusion apparatus includes: a cylinder; the sealing rings are inserted into the cylinder body, the sealing rings are arranged at the two ends of the cylinder body, and the sealing rings protrude out of the cylinder body along the axial direction of the cylinder body; the two end covers are provided with an insertion part and a side plate, the insertion part is inserted into the inner ring of the corresponding sealing ring, and the side plate is abutted against the part of the sealing ring protruding out of the cylinder body; the locking nuts are arranged in two and are in threaded connection with the cylinder body, and the locking nuts are used for compressing the corresponding end covers.

The blood perfusion device provided by the embodiment of the utility model has at least the following beneficial effects: the sealing ring is inserted into the cylinder, then the end cover is connected with the cylinder and the sealing ring, and because the side plates are abutted to the part of the sealing ring protruding out of the cylinder, a plurality of surfaces of the sealing ring are abutted to the cylinder or the end cover to form a plurality of sealing surfaces, and when high-temperature steam is used for sterilization, the plurality of sealing surfaces can effectively prevent liquid in the cylinder from leaking after being gasified, so that the sealing effect is enhanced, and the product percent of pass is improved.

According to some embodiments of the utility model, a first step is arranged at the end of the cylinder, the sealing ring comprises a plug cylinder and a flanging, the plug cylinder is inserted into the cylinder, the flanging is lapped on the first step, the arranged first step and the sealing ring are matched to form a plurality of sealing surfaces, the sealing effect is enhanced, and in addition, the sealing ring is supported in the cylinder for limiting the sealing ring.

According to some embodiments of the utility model, an annular raised line is arranged at one end of the flanging for contacting with the end cover, and the annular raised line is arranged, so that the upper bottom surface of the end cover and the sealing ring are easier to squeeze and deform to contact, and the axial sealing effect of the end cover and the cylinder body is improved.

According to some embodiments of the utility model, the annular protruding strip is provided with a sharp top near one end of the end cover, and the sharp top is arranged to enable the upper bottom surface of the end cover to be in linear contact with the sealing ring, so that the end cover is more tightly and completely attached, and the axial sealing effect of the end cover and the cylinder body is improved.

According to some embodiments of the present utility model, the sealing device further comprises two net racks, the two net racks are disposed in the cylinder, a separation net is disposed on the net racks, a filling space is defined between the two separation nets, the sealing ring is abutted against the corresponding net racks, and the net racks can be used for limiting the filler in the cylinder to flow out, can also support the sealing ring line, and can also perform a height compensation function on the sealing ring.

According to some embodiments of the utility model, a chamfer is provided at an end of the cartridge adjacent to the grid, the chamfer being configured to guide the cartridge into the barrel, the chamfer being provided to facilitate insertion of the cartridge.

According to some embodiments of the utility model, a second step is further arranged in the cylinder, the net rack is clamped on the second step, and the second step is used for limiting and supporting the net rack.

According to some embodiments of the utility model, the diameter of the inner ring of the sealing ring is smaller than the diameter of the outer ring of the insertion part, so that interference fit is realized, and sealing is facilitated.

According to some embodiments of the utility model, an arc-shaped transition surface is arranged at the junction of the inner peripheral wall and the inner top surface of the lock nut, and the arc-shaped transition surface can disperse stress and avoid cracking and damaging the lock nut.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a semi-sectional view of a blood perfusion apparatus according to an embodiment of the present utility model;

FIG. 2 is an exploded view of the upper half of the blood perfusion apparatus shown in FIG. 1;

FIG. 3 is an exploded view of FIG. 2 at A;

FIG. 4 is a schematic view of the cartridge body of the blood perfusion apparatus shown in FIG. 1;

FIG. 5 is a schematic view of the seal ring of the blood perfusion apparatus shown in FIG. 1;

fig. 6 is a schematic structural view of a lock nut of the blood perfusion apparatus shown in fig. 1.

A cylinder 100, a first step 110, a second step 120;

net rack 200, spacer 210;

the sealing ring 300, the insertion barrel 310, the chamfer structure 311, the flanging 320, the annular raised strips 330 and the sharp peaks 331;

end cap 400, insert 410, side plate 420;

lock nut 500, arcuate transition surface 510.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a plurality means one or more, and a plurality means two or more, and it is understood that greater than, less than, exceeding, etc. does not include the present number, and it is understood that greater than, less than, within, etc. include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 6, a blood perfusion apparatus includes: a cylinder 100; the sealing rings 300 are inserted into the cylinder 100, the sealing rings 300 are arranged at two ends of the cylinder 100, and the sealing rings 300 protrude out of the cylinder 100 along the axial direction of the cylinder 100; the end covers 400 are provided, the end covers 400 are provided with insertion parts 410 and side plates 420, the insertion parts 410 are inserted into the inner rings of the corresponding sealing rings 300, and the side plates 420 are abutted against the parts of the sealing rings 300 protruding out of the cylinder body 100; two lock nuts 500 are provided, the lock nuts 500 are in threaded connection with the cylinder 100, and the lock nuts 500 are used for compressing the corresponding end caps 400. The sealing ring 300 is inserted into the cylinder 100, then the end cover 400 is connected with the cylinder 100 and the sealing ring 300, and because the side plate 420 is abutted on the part of the sealing ring 300 protruding out of the cylinder 100, a plurality of surfaces of the sealing ring 300 are abutted with the cylinder 100 or the end cover 400 to form a plurality of sealing surfaces, and the sealing surfaces can effectively prevent liquid in the cylinder 100 from leaking after being gasified during high-temperature steam sterilization, so that the sealing effect is enhanced, and the product percent of pass is improved. It is to be noted that, the first step 110 provided increases the sealing surface, and the inner ring diameter of the seal ring 300 is smaller than the outer ring diameter of the insertion portion 410, when the end cap 400 is inserted into the seal ring 300, the outer side of the end cap 400 faces the seal ring 300 to generate a pressing force to the inner wall of the cylinder 100, thereby realizing the side wall sealing between the end cap 400 and the cylinder 100; when the lock nut 500 is screwed, the upper bottom surface of the end cover 400 and the first step 110 squeeze the sealing ring 300, the top 331 has the function of enabling the upper bottom surface of the end cover 400 to linearly contact with the sealing ring 300, and the top 331 is relatively contacted with a plane during extrusion, so that larger deformation is generated, the end cover 400 is tightly and completely attached, and the axial sealing effect of the end cover 400 and the cylinder 100 is improved; the sealing ring 300, the end cover 400 and the first step 110 are matched to finish the sealing of a plurality of surfaces between the end cover 400 and the cylinder 100, so that the sealing effect is enhanced, and the qualification rate of finished products is improved. In addition, the first step 110 is designed on the cylinder 100, and the lower end surface of the end cap 400 acts on the first step 110 of the cylinder 100 through the sealing ring 300 during assembly, instead of being attached to the end surface of the cylinder 100 through a rubber sealing gasket, the effect is that when the locking nut 500 is screwed, the end cap 400 presses the sealing ring 300 until the end cap 400 contacts the end surface of the cylinder 100, the end cap 400 does not generate downward displacement any more, the constant deformation of the sealing ring 300 is ensured, the sealing stability is realized, the locking nut 500 also has downward constant displacement, and the locking nut 500 is prevented from being cracked due to excessive screwing. The arc transition surface 510 is arranged at the joint of the thread surface of the inner wall and the upper bottom surface of the lock nut 500, so that the internal stress generated at the corner of the lock nut 500 in the injection molding process is reduced, the strength of the lock nut 500 is increased, and the stress cracking caused under the high-temperature steam sterilization high-temperature high-pressure condition is avoided.

Referring to fig. 1 and 4, the end of the cylinder 100 is provided with a first step 110, the sealing ring 300 includes a socket 310 and a flange 320, the socket 310 is inserted into the cylinder 100, the flange 320 is overlapped on the first step 110, the provided first step 110 and the sealing ring 300 cooperate to form a plurality of sealing surfaces, so as to enhance the sealing effect, and in addition, in order to limit the sealing ring 300, the sealing ring 300 is supported in the cylinder 100. It may be understood that the sealing ring 300 is disposed between the end cover 400 and the cylinder 100, the lock nut 500 is disposed above the end cover 400, the net frame 200 is disposed below the sealing ring 300, the sealing ring 300 has a structure that an annular raised line 330 is added at the upper end of the sealing ring 300, the end face seal between the end cover 400 and the cylinder 100 is enhanced, and the side wall seal faces between the two end covers 400 and the cylinder 100 are additionally added. The end face of the cylinder 100 is provided with the first step 110, the compression amount of the sealing ring 300 is constant, the stability of the sealing effect is ensured, the cracking caused by excessive twisting of the locking nut 500 is avoided, the threaded surface of the locking nut 500 is connected with the arc transition surface 510 arranged on the bottom surface of the upper end, the internal stress generated at the corner of a plastic part in the injection molding process is reduced, the strength of the locking nut 500 is increased, and the stress cracking caused under the high-temperature high-pressure steam sterilization conditions is avoided.

Referring to fig. 1, 2, 3 and 5, the flange 320 is provided with an annular protruding strip 330 at one end for contacting the end cover 400, and the annular protruding strip 330 is provided, so that the upper bottom surface of the end cover 400 and the sealing ring 300 are easier to squeeze and deform to contact, and the axial sealing effect of the end cover 400 and the cylinder 100 is improved.

In some embodiments, the end of the annular protruding strip 330 near the end cover 400 is provided with a sharp peak 331, and the sharp peak 331 is provided, so that the upper bottom surface of the end cover 400 is in linear contact with the sealing ring 300, a more tight and complete fit is achieved, and the axial sealing effect of the end cover 400 and the cylinder 100 is improved.

In some embodiments, the device further comprises two net racks 200, the two net racks 200 are arranged in the cylinder 100, the net racks 200 are provided with the separation net 210, a filling space is defined between the two separation net 210, the sealing rings 300 are abutted against the corresponding net racks 200, and the net racks 200 can be used for limiting the filler in the cylinder 100 to flow out, can also play a supporting role on the sealing rings 300 and can also play a role in compensating the height of the sealing rings 300.

In some embodiments, a chamfer structure 311 is provided at an end of the cartridge 310 near the rack 200, the chamfer structure 311 being used to guide the cartridge 310 into the barrel 100, the chamfer structure 311 being provided to facilitate insertion of the cartridge 310.

In some embodiments, a second step 120 is further disposed in the barrel 100, and the rack 200 is clamped on the second step 120, and the second step 120 is used for limiting and supporting the rack 200.

In some embodiments, the inner ring diameter of seal ring 300 is smaller than the outer ring diameter of insert 410 to achieve an interference fit, facilitating sealing.

In some embodiments, the interface between the inner peripheral wall and the inner top surface of the lock nut 500 is provided with an arc-shaped transition surface 510, and the arc-shaped transition surface 510 can disperse the stress to avoid the lock nut 500 from cracking and damaging.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. A blood perfusion apparatus, comprising:

a cylinder (100);

the sealing rings (300) are inserted into the cylinder body (100), the sealing rings (300) are arranged at two ends of the cylinder body (100), and the sealing rings (300) protrude out of the cylinder body (100) along the axial direction of the cylinder body (100);

the two end covers (400) are arranged, the end covers (400) are provided with insertion parts (410) and side plates (420), the insertion parts (410) are inserted into the corresponding inner rings of the sealing rings (300), and the side plates (420) are abutted against the parts, protruding out of the cylinder body (100), of the sealing rings (300);

the locking nuts (500) are arranged in two, the locking nuts (500) are in threaded connection with the cylinder body (100), and the locking nuts (500) are used for pressing the corresponding end covers (400).

2. A blood perfusion apparatus according to claim 1, wherein: the end of the cylinder body (100) is provided with a first step (110), the sealing ring (300) comprises an inserting cylinder (310) and a flanging (320), the inserting cylinder (310) is inserted into the cylinder body (100), and the flanging (320) is lapped on the first step (110).

3. A blood perfusion apparatus according to claim 2, wherein: one end of the flanging (320) for contacting the end cover (400) is provided with an annular raised line (330).

4. A blood perfusion apparatus according to claim 3, wherein: the annular protruding strip (330) is provided with a sharp top (331) near one end of the end cover (400).

5. A blood perfusion apparatus according to claim 2, wherein: still include rack (200), rack (200) are provided with two, two rack (200) set up in barrel (100), be provided with on rack (200) and separate net (210), two separate and prescribe a limit to between net (210) and fill the space, sealing washer (300) butt is in on corresponding rack (200).

6. A blood perfusion apparatus according to claim 5, wherein: one end of the insertion barrel (310) close to the net rack (200) is provided with a chamfering structure (311), and the chamfering structure (311) is used for guiding the insertion barrel (310) to enter the barrel (100).

7. A blood perfusion apparatus according to claim 6, wherein: the barrel (100) is internally provided with a second step (120), and the net rack (200) is clamped on the second step (120).

8. A blood perfusion apparatus according to claim 1, wherein: the inner ring diameter of the seal ring (300) is smaller than the outer ring diameter of the insertion portion (410).

9. A blood perfusion apparatus according to claim 1, wherein: an arc-shaped transition surface (510) is arranged at the junction of the inner peripheral wall and the inner top surface of the lock nut (500).