CN222488326U - Universal protective cap for hemodialyzer and hemodialyzer - Google Patents
Universal protective cap for hemodialyzer and hemodialyzer Download PDFInfo
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- CN222488326U CN222488326U CN202323151797.9U CN202323151797U CN222488326U CN 222488326 U CN222488326 U CN 222488326U CN 202323151797 U CN202323151797 U CN 202323151797U CN 222488326 U CN222488326 U CN 222488326U
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- hemodialyzer
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Abstract
The utility model provides a universal protective cap for a hemodialysis device and the hemodialysis device, which are characterized by comprising an end cover, wherein a ring wall extends from the top of the end cover to the opening direction of the end cover, a first contact surface is arranged on the periphery of the ring wall, a protrusion extends from the ring wall to the opening direction of the end cover, a second contact surface is arranged on the protrusion, the ring wall and the protrusion are made of elastic materials, a dialysate interface can be sleeved outside the ring wall, the first contact surface is in interference clamping connection with the peripheral surface of an inner hole of the dialysate interface, the protrusion can be arranged in a blood chamber interface, and the second contact surface is closely connected with the inner hole of the blood chamber interface. The utility model not only can be used for two places of blood chamber interface and dialysis fluid measurement, but also ensures good dustproof effect of the blood chamber interface and good airtight sealing effect of the dialysis fluid interface side.
Description
Technical Field
The utility model relates to the technical field of medical equipment, in particular to a universal protective cap for a hemodialysis machine and the hemodialysis machine.
Background
The hemodialysis device is a pipeline and a container for exchanging solutes between blood and dialysate, and is a key part of hemodialysis. Dialyzers are usually composed of hollow fiber tows, hollow cylinders, sealing rings, potting adhesive layers, end caps and protective caps. The protective cap generally refers to a cap structure mounted to the blood compartment inlet and outlet and the dialysate inlet and outlet.
Because of the different requirements for the flow rates or flows of blood and dialysate, the diameters of the axial port (i.e., the blood chamber port) and the radial port (i.e., the dialysate port) of the dialyzer cylinder are slightly different, so that manufacturers need to design different protective caps for the blood chamber port and the dialysate port of the dialyzer. In order to reduce the number of the dies and the production cost, some manufacturers design the blood room interface and the protective cap of the dialysate interface to be the same, and the two parts are universal, and the materials are usually polypropylene, so that the sealing effect is common, only the functions of covering the interface and preventing dust can be achieved, and the interface cannot be sealed in an airtight manner.
Moreover, it has been found in research that medical personnel pre-flush the dialyzer before using the dialyzer to remove gases and impurities from the interior of the dialyzer. During pre-flushing, normal saline flows into the inner cavity of the cylinder body from the blood chamber interface at the upper end of the dialyzer and then flows out from the blood chamber interface at the lower end, and in the process, as the protective cap at the dialysate interface has no airtight sealing function, the normal saline in the cylinder body overflows from the dialysate interface to moisten the ground, and the effect of pre-flushing and exhausting can be influenced in severe cases.
Therefore, it is highly desirable to provide a protective cap that can provide an airtight seal for the dialysate interface of a dialyzer, and that can be used for both the blood chamber interface and the gas-permeable interface of a dialyzer.
Disclosure of utility model
The utility model provides a universal protective cap for a hemodialysis device and the hemodialysis device, which can ensure that a blood chamber interface has a good dustproof effect and a dialysate interface side has a good airtight sealing effect while being used for two places of the blood chamber interface and the dialysate side.
The application provides a universal protective cap for a hemodialysis device, which is characterized by comprising an end cover, wherein an annular wall extends from the top of the end cover to the opening direction of the end cover, a first contact surface is arranged on the periphery of the annular wall, a protrusion also extends from the annular wall to the opening direction of the end cover, a second contact surface is arranged on the protrusion, the annular wall and the protrusion are made of elastic materials, a dialysate interface can be sleeved outside the annular wall, the first contact surface is in interference clamping connection with the peripheral surface of an inner hole of the dialysate interface, the protrusion can be arranged in a blood chamber interface, and the second contact surface is in tight joint or interference fit clamping connection with the inner hole of the blood chamber interface.
Further, the end cover comprises a peripheral wall and an end wall, wherein the peripheral wall is sleeved on the periphery of the annular wall, one end of the end wall is connected with the peripheral wall, and the other end of the end wall is connected with the annular wall.
Further, the annular wall comprises an outer ring and a transverse surface closely connected with the circumference of the outer ring, the protrusions are arranged on the lower bottom surface of the transverse surface, the first contact surface is arranged on the periphery of the outer ring, and the outer ring, the transverse surface and the protrusions are made of soft rubber materials.
Further, the end wall is integrally formed with the annular wall.
Further, the peripheral wall is made of a hard rubber material.
Further, the outer diameter of the outer ring is gradually reduced towards the opening direction of the end cover, and at least part of the outer diameter of the outer ring is larger than the inner diameter of the dialysate interface.
Further, a plurality of ribs are arranged on the inner peripheral surface of the peripheral wall at intervals, a limiting block protruding towards the axis direction of the annular wall is further arranged above the ribs on the inner peripheral surface of the peripheral wall, vertical edges along the axial direction of the peripheral wall and transverse edges perpendicular to the vertical edges are arranged on the limiting block, grooves are formed between the vertical edges and the outer peripheral wall of the outer ring, the groove width of the grooves is matched with the thickness of the end wall of the dialysate interface, when the protective cap is matched with the dialysate interface, the end wall of the dialysate interface can be embedded into the grooves, so that the limiting block radially extrudes the dialysate interface through the vertical edges, interference fit clamping of the annular wall and the dialysate interface is further guaranteed, and in addition, the transverse edges are used for abutting against the end face of the blood chamber interface when the protective cap is matched with the blood chamber interface, and the protective cap is guaranteed to be installed in place.
Further, the center of the protrusion coincides with the center of the outer ring.
Further, the periphery on perisporium top is equipped with the connecting hole, and the position that the end wall corresponds the hole site is equipped with towards perisporium fixed column, and the fixed column can imbed the connecting hole.
The application also provides a hemodialysis machine which is characterized by comprising the universal protective cap for the blood ventilation device.
The technical scheme provided by the embodiments of the application has the advantages that the bulge made of the elastic material can be matched with the inner hole of the blood chamber interface in a sealing and clamping way, so that the tightness of the blood chamber interface is ensured, and the peripheral surface of the annular wall is tightly clamped and fixed with the inner hole of the dialysate interface in an interference fit way through the annular wall made of the elastic material, so that the protection cap can be used for both the blood chamber interface and the dialysate interface, and also ensures the good dustproof effect of the blood chamber interface and the good airtight sealing effect of the dialysate interface side.
Drawings
In order to more clearly illustrate the embodiments of the present utility model, the following description will briefly explain the embodiments or the drawings required for the description of the prior art, it being obvious that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic view showing a first axial direction tangential plane structure of the present embodiment;
FIG. 2 is a schematic view showing a tangential plane structure in the second axial direction of the present embodiment;
FIG. 3 is a schematic view showing the reverse structure of the present embodiment;
Fig. 4 is a schematic front view of the present embodiment;
fig. 5 is a schematic view of the mounting structure of the present embodiment.
The following describes the embodiments of the present utility model in further detail with reference to the drawings.
Detailed Description
In describing embodiments of the present utility model in detail, the drawings showing the structure of the device are not to scale locally for ease of illustration, and the schematic illustrations are merely examples, which should not limit the scope of the utility model. It should be noted that the drawings are in simplified form and are not to scale precisely, but rather are merely intended to facilitate and clearly illustrate the embodiments of the present utility model. It should be noted that the connection mentioned in the present utility model may be a direct connection or an indirect connection.
As shown in fig. 1-5, this embodiment provides a universal protective cap for a hemodialysis device, which comprises a peripheral wall 1, a ring wall 2 and an end wall 3, wherein the peripheral wall 1 is provided with an upper port and a lower port, the ring wall 2 comprises an outer ring 21 and a transverse surface 22 closely connected to the inner periphery of the outer ring, the section of the outer ring 21 and the transverse surface 22 in the axial direction of the ring wall 2 is in an H-like shape, the peripheral wall 1 is sleeved on the outer periphery of the ring wall 2, one end of the end wall 3 is connected with the upper port of the peripheral wall 1, the other end of the end wall 3 is closely connected with the upper end surface of the ring wall 2, specifically, the other end of the end wall 3 is closely connected with the top surface of the outer ring 21, the outer periphery of the ring wall 2 is provided with a first contact surface, a protrusion is further extended in the direction facing the opening of the end cover, specifically, the protrusion is arranged on the lower bottom surface of the transverse surface 22, the protrusion is provided with a second contact surface, the outer wall of the ring wall 2 wraps the blood chamber interface 4, the ring wall 2 and the protrusion 23 can be clamped with the inner hole of the blood chamber interface 4 through the second contact surface or interference fit, and the contact may be closely or just contact. The annular wall 2 can be clamped with an interference fit with the inner hole of the dialysate interface 5 through a first contact surface thereon.
In some embodiments, the peripheral wall 1 is cylindrical, the periphery of the cylindrical peripheral wall 1 may be provided with a plurality of ribs 11 or other ribs of regular or irregular shape or other structures, forms of bumps or the like for increasing the hand holding friction force, in this embodiment, the periphery of the peripheral wall 1 is arranged with regular strip-shaped ribs at intervals along the axial direction of the peripheral wall 1, and the lower end of the peripheral wall 1 is provided with an opening 12, which is an inlet port of the blood chamber port 4 or the dialysate port 5.
In some embodiments, the peripheral wall 1 may be made of a hard plastic material, and the peripheral wall 2 and the protrusions 23 are made of a soft plastic material, but the peripheral wall is not limited to the hard plastic material, and in practical use, the peripheral wall 1 may be made of a non-elastic material or a software material identical to the peripheral wall, and the hard plastic material has a certain elasticity, but compared with the soft plastic material, the elasticity of the hard plastic material is not as large as that of the soft plastic material, so that when the peripheral wall 1 is made of the hard plastic material, the opening molding is convenient, and the connection with other components is convenient.
In some embodiments, the end wall 3 and the annular wall 2 are integrally formed, and when the annular wall 2 is integrally formed, the end wall 3 can be formed by downwards sinking and injection molding from the top, and the other end of the peripheral wall 1 is provided with an opening 12 of a protective cap, and the opening 12 can be connected with the blood chamber interface 4 or the dialysate interface 5.
In some embodiments, part of the outer diameter of the annular wall 2, or at least the outer diameter of the first contact surface is slightly larger than the inner diameter of the dialysate interface 5, and the first contact surface of the annular wall 2 can be in interference fit with the inner hole of the dialysate interface 5, and the annular wall 2 is compressed and deformed during interference fit due to the elasticity of the soft rubber material of the annular wall 2, so that the effect of hermetically sealing the dialysate interface 5 can be achieved.
In some embodiments, ribs 13 are provided at intervals on the inner peripheral surface of the peripheral wall 1. The ribs 13 can reduce the contact area, prevent the peripheral wall 1 from being too tightly matched with the blood chamber interface 4 or the dialysate interface 5, and in addition, the interference fit amount can be increased under the condition of proper matching tightness, so that the loosening of the protective cap caused by the deviation of injection molding size and the conventional aging of the product is reduced.
In summary, the rib 13 is provided on the inner peripheral surface of the peripheral wall 1, and the soft rubber material of the annular wall 2 is fitted, so that the dialysate port 5 can be hermetically sealed.
In some embodiments, a limiting block 14 protruding towards the axis direction of the annular wall 2 is further arranged above the rib 13 on the inner peripheral surface of the peripheral wall 1, a vertical edge 141 along the axial direction of the peripheral wall 1 and a transverse edge 142 perpendicular to the vertical edge direction are arranged on the limiting block 14, a groove 143 is formed between the vertical edge 141 and the outer peripheral wall of the outer ring 21, the groove width of the groove is matched with the thickness of the end wall of the dialysate interface 5, and when the protective cap is matched with the dialysate interface 5, the end wall of the dialysate interface 5 can be embedded into the groove 143, so that the limiting block 14 generates radial extrusion on the dialysate interface 5 through the vertical edge, interference fit clamping of the annular wall 2 and the dialysate interface 5 is further guaranteed, and in addition, the transverse edge 142 is used for abutting against the end surface of the blood chamber interface 4 when the protective cap is matched with the blood chamber interface 4, so that the protective cap is guaranteed to be installed in place.
In some embodiments, the limiting block 14 may extend from the rib 13 on the inner peripheral surface of the peripheral wall 1 to the top end of the adjacent end wall 3 along the axial direction, and bulge to form a plurality of right-angle limiting blocks protruding toward the axis of the annular wall 2, the transverse edges 142 are perpendicular to the vertical edges 141, and the limiting block with the right-angle structure not only realizes the functions of matching, abutting and clamping the peripheral wall with the blood chamber interface and the dialysate interface, but also has simple and durable structure.
In addition, in some embodiments, the outer diameter of the outer ring 21 tapers toward the end cap opening. The degree of tightness of the outer ring 21 and the dialysate interface 5 is suitable, the outer ring can be assembled in place without too great force during assembly, and the outer ring can be disassembled without too great force during disassembly, so that the outer ring is convenient to use, and the customer experience degree is improved.
In some embodiments, according to the size of the dialysate interface 5, the outer diameter of the outer ring 21 can be correspondingly adjusted, so that a proper compression amount is ensured when the outer ring 21 is extruded, and tightness is ensured, and the protective cap cannot be pulled out due to too much interference fit.
In some embodiments, the protrusion 23 is a hemispherical protrusion, the center of the sphere coincides with the axis of the annular wall 2, the aperture of the hemispherical protrusion 23 is not smaller than the inner hole of the blood chamber interface 4, and the hemispherical protrusion can be in interference fit with the inner hole of the blood chamber interface 4, so that the connection is tighter, and the seal is formed to be dustproof. Specifically, when the protective cap is matched with the blood chamber interface 4, the hemispherical protrusions are clamped into the inner holes of the blood chamber interface 4 to form a seal and prevent dust, the inner diameter of the hemispherical protrusions can be properly adjusted and is slightly larger than the inner holes of the blood chamber interface 4, and when the protective cap is matched with the blood chamber interface 4, as the end wall 3 and the hemispherical protrusions are made of soft rubber materials, the end wall 3 is pressed vertically downwards, the hemispherical protrusions can be extruded and clamped into the inner holes of the blood chamber interface 4 to form interference fit, and the effect of airtight sealing of the blood chamber interface is achieved.
In some embodiments, the hemispherical protrusion 23 has a caliber equal to the inner hole of the blood chamber interface 4, and can abut or seal against the inner hole of the blood chamber interface 4.
In other embodiments, the protrusion 23 may have an inverted truncated cone or conical shape, at least a portion of the caliber of the protrusion 23 is greater than or equal to the inner diameter of the blood chamber interface, the above shapes are merely exemplified, and the specific shapes are not limited, so long as the installation form of the protrusion can achieve interference fit with the blood chamber interface, and the structural shape of ensuring air tightness can be adopted.
In addition, it should be noted that, in the above embodiment, the hard rubber material may be PP, PE, or the like, and the soft rubber material may be TPE, PVC, or the like.
In some embodiments, in order to improve the connection effect between the end wall 3 and the peripheral wall 1, a connection hole is further formed on the outer periphery of the top end of the peripheral wall 1, and a fixing post 31 is disposed at a position corresponding to the hole position of the end wall 3, where the fixing post 31 can be embedded into the connection hole. The quantity of connecting hole can be 2 and above, and the connecting hole more than 2 can two equidistant settings, and fixed column 31 can with end wall 3 integrated into one piece, under the condition that fixed column 31 is elastic material, the diameter of fixed column 31 also can be slightly more than the aperture of connecting hole, can realize interference fit like this and connect for both are connected compacter, are difficult for droing.
A hemodialysis machine comprising the universal protective cap for the hemodialysis machine.
In some embodiments, the hemodialysis device comprises an upper inlet chamber interface and a lower outlet chamber interface, the upper inlet chamber interface and the lower outlet chamber interface are positioned in the same vertical direction, two dialysate interfaces in the horizontal direction are arranged on the side surface of the hemodialysis device, and the universal protective cap of the hemodialysis device can be respectively covered on the upper chamber interface, the lower chamber interface and the dialysate interfaces in the horizontal direction.
In this embodiment, the same protective cap can be matched with both the blood chamber interface and the dialysate interface, thereby realizing the versatility of the blood chamber interface and the dialysate interface.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323151797.9U CN222488326U (en) | 2023-11-22 | 2023-11-22 | Universal protective cap for hemodialyzer and hemodialyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323151797.9U CN222488326U (en) | 2023-11-22 | 2023-11-22 | Universal protective cap for hemodialyzer and hemodialyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222488326U true CN222488326U (en) | 2025-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323151797.9U Active CN222488326U (en) | 2023-11-22 | 2023-11-22 | Universal protective cap for hemodialyzer and hemodialyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222488326U (en) |
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2023
- 2023-11-22 CN CN202323151797.9U patent/CN222488326U/en active Active
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