A sizing sleeve for medical catheter production
Patent Information
- Application Number
- CN202522071698.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-09-26
AI Technical Summary
[0005]本实用新型的目的是为了解决现有技术中存在设备在对软管进行连接时，一般使用螺栓进行安装，螺栓的安装与拆卸需要使用工具进行操作，工具的使用过于繁琐，造成使用者安装效率低下的缺点，而提出的一种用于医用导管生产的定径套
[0014]1、本实用新型中，通过设置连接装置，有效地对软管与连接头进行快速安装，起到了快速安装软管的作用，减少了现有设备在对软管进行安装时，一般使用螺栓螺母进行螺纹连接，螺纹连接与拆卸，需要使用工具进行操作，工具的使用过于繁琐，造成使用者安装效率低下的情况，此连接装置，实现了软管的快速连接，提高了使用者的安装效率。
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Figure CN224810049U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sizing sleeve technology, and in particular to a sizing sleeve used in the production of medical catheters. Background Technology
[0002] The sizing sleeve in medical catheter production is a core shaping device in the catheter extrusion molding process. It is mainly used to control the outer diameter accuracy, roundness, and surface finish of medical catheters, such as infusion tubes and urinary catheters. It is a key component to ensure the safety and compatibility of catheters in clinical use. It is widely used in medical polymer catheter production lines. It is usually a hollow cylindrical structure, and the material is mostly brass or stainless steel with good corrosion resistance and thermal conductivity. The inner wall has a spiral guide groove, and the outside is equipped with a cooling water jacket. During operation, the thermoplastic tube that has just been extruded from the extruder die is fed into the sizing sleeve in a molten state. It is quickly cooled and shaped by the cooling water guided by the inner wall. At the same time, with the help of negative pressure adsorption or positive pressure support, the tube is tightly attached to the sleeve wall, and finally a catheter blank with accurate dimensions and regular shape is formed. The inner diameter, length, and cooling efficiency of the sizing sleeve need to be customized according to the catheter specifications and materials, which directly determines the key physical dimensional indicators of the catheter.
[0003] However, the existing equipment has the following shortcomings: When installing hoses, the existing equipment generally uses bolts and nuts for threaded connection. The threaded connection and disassembly require the use of tools, which are too cumbersome and result in low installation efficiency for users.
[0004] Therefore, we propose a sizing sleeve for the production of medical catheters to solve the problems mentioned above. Utility Model Content
[0005] The purpose of this utility model is to solve the problem that in the existing technology, when connecting equipment to hoses, bolts are generally used for installation. The installation and removal of bolts require tools, which are too cumbersome and result in low installation efficiency for users. Therefore, a sizing sleeve for the production of medical catheters is proposed.
[0006] To achieve the above objectives, this utility model adopts the following technical solution: a sizing sleeve for medical catheter production, comprising a first mounting plate, a second mounting plate, a mounting barrel, a connecting rod, a connector, a plastic tube, a discharge head, and a connecting device. The plastic tube is fixedly connected to one end of the first mounting plate, and the end of the plastic tube away from the first mounting plate is fixedly connected to the second mounting plate. The connecting rod is installed between the first and second mounting plates. The mounting barrel is installed on the surface of the plastic tube. The discharge head is fixedly connected to the end of the first mounting plate away from the plastic tube. The connector is fixedly connected to the surface of the discharge head. The connecting device is installed on... The connector includes a plug and a flexible tube. The plug is inserted into the surface of the connector. The flexible tube is installed on the upper end of the plug. A movable ring is slidably connected to the surface of the plug. A limiting ring is fixedly connected to the surface of the plug. A first spring is sleeved on the surface of the plug. One end of the first spring is fixedly connected to the upper end of the movable ring. The end of the first spring away from the movable ring is fixedly connected to the lower surface of the limiting ring. A movable hole is opened inside the plug. A limiting groove is opened on the surface of the connector. A limiting rod is slidably connected inside the movable hole. One end of the limiting rod is engaged with the inside of the limiting groove.
[0007] Furthermore, a slider is fixedly connected to the surface of the limiting rod, and the slider is slidably connected inside the moving hole. By setting the limiting rod, the connection between the plug and the connector can be restricted, reducing the difficulty of quickly installing the plug and connector during use.
[0008] Furthermore, a second spring is sleeved and connected to the surface of the limiting rod.
[0009] Furthermore, one end of the second spring is fixedly connected to the surface of the slider, and the end of the second spring away from the slider is fixedly connected to the inside of the moving hole. The second spring is provided to facilitate the application of a reset force to the limit rod.
[0010] Furthermore, an auxiliary component is fixedly provided on the surface of the discharge head. The auxiliary component includes a support arm and a retaining ring. The support arm is fixedly connected to the outer surface of the discharge head, and the retaining ring is installed at one end of the support arm. A groove is formed at the end of the support arm near the retaining ring. A connecting block is fixedly connected to the side of the retaining ring, and a sliding rod is fixedly connected to the end of the connecting block near the support arm. The sliding rod is slidably connected inside the groove. By setting the retaining ring, the hose can be closely connected to the support arm, reducing the situation where the hose is difficult to limit to the support arm during use.
[0011] Furthermore, a third spring is fixedly connected to the end of the slide rod away from the connecting block, and the end of the third spring away from the slide rod is fixedly connected to the inside of the pull groove. The third spring is provided to facilitate the application of a reset spring force to the retaining ring.
[0012] Furthermore, a pull handle is fixedly connected to the end of the retaining ring away from the support arm, and the pull handle facilitates the movement of the retaining ring.
[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0014] 1. In this utility model, by setting a connecting device, the hose and connector can be quickly installed, which can quickly install the hose. This reduces the need for tools to operate when installing hoses with existing equipment, which generally uses bolts and nuts for threaded connection and disassembly. The use of tools is too cumbersome and results in low installation efficiency for users. This connecting device realizes the quick connection of hoses and improves the installation efficiency of users.
[0015] 2. In this utility model, by setting an auxiliary component, the hose is effectively limited, thus restricting its position. This reduces the risk of the hose being easily impacted by liquid when the cooling medium flows through it after connection to the connector in existing equipment. This can cause the hose to move and come into prolonged contact with the surface of the first mounting plate of the equipment. Since the temperature of the first mounting plate is between 80 and 90 degrees Celsius for a long time during equipment operation, prolonged contact with the hose can easily damage it, affecting the liquid filling process. This auxiliary component limits the hose, preventing it from aging and breaking due to high temperature, extending its service life. It also prevents the connection device from loosening and leaking due to hose shaking, ensuring a stable supply of cooling medium and improving the reliability of equipment operation. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0017] Figure 1 This utility model provides a three-dimensional structural diagram of a sizing sleeve for the production of medical catheters;
[0018] Figure 2 This utility model provides a side view of a sizing sleeve for the production of medical catheters.
[0019] Figure 3 This utility model provides a schematic diagram of the discharge head structure for a sizing sleeve used in the production of medical catheters;
[0020] Figure 4 This utility model proposes a sizing sleeve for the production of medical catheters. Figure 3 Enlarged structural diagram at point A in the middle;
[0021] Figure 5This utility model proposes a sizing sleeve for the production of medical catheters. Figure 4 Enlarged structural diagram at point B;
[0022] Figure 6 This utility model proposes a sizing sleeve for the production of medical catheters. Figure 4 Enlarged structural diagram at point C.
[0023] Legend: 1. First mounting plate; 2. Second mounting plate; 3. Mounting barrel; 4. Connecting rod; 5. Connector; 6. Shaping tube; 7. Discharge head; 8. Connecting device; 81. Plug; 82. Moving ring; 83. Hose; 84. Limiting ring; 85. First spring; 86. Limiting groove; 87. Moving hole; 88. Limiting rod; 89. Sliding block; 810. Second spring; 9. Auxiliary component; 91. Support arm; 92. Snap ring; 93. Pull handle; 94. Connecting block; 95. Pull groove; 96. Slide rod; 97. Third spring. Detailed Implementation
[0024] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0025] Please see Figures 1-6 This utility model provides a technical solution: a sizing sleeve for the production of medical catheters, comprising a first mounting plate 1, a second mounting plate 2, a mounting barrel 3, a connecting rod 4, a connector 5, a shaping tube 6, a discharge head 7, and a connecting device 8. The shaping tube 6 is fixedly connected to one end of the first mounting plate 1, and the end of the shaping tube 6 away from the first mounting plate 1 is fixedly connected to the second mounting plate 2. The connecting rod 4 is installed between the first mounting plate 1 and the second mounting plate 2. The mounting barrel 3 is installed on the surface of the shaping tube 6. The discharge head 7 is fixedly connected to the end of the first mounting plate 1 away from the shaping tube 6, and the connector 5 is fixedly connected to the surface of the discharge head 7.
[0026] The first mounting plate 1 and the second mounting plate 2 are the two end support structures of the sizing sleeve. They are made of high-temperature resistant and corrosion-resistant metal material, which can withstand the heat conducted by the molten conduit and ensure the stability of the support. The connecting rod 4 connects the two mounting plates to form a rigid frame to resist the vibration during equipment operation and prevent the deformation of the plastic tube 6. The mounting bucket 3 is a component for containing and guiding the cooling medium. The inner wall is treated with anti-corrosion and can evenly deliver the cooling medium around the plastic tube 6. The connector 5 is the inlet and outlet interface of the cooling medium. It is made of a material with excellent sealing performance to ensure that the medium does not leak. The plastic tube 6 is the core of the conduit sizing. The inner wall smoothness Ra≤0.2μm and its inner diameter directly determines the target outer diameter of the conduit. The material is high-temperature resistant and wear-resistant to ensure sizing accuracy. The discharge head 7 guides the smooth output of the shaped conduit and avoids scratches on the conduit surface. The connecting device 8 realizes the quick disassembly and assembly of the cooling hose 83 and the connector 5. The sealing connection can be completed without tools.
[0027] The specific settings and functions of its connecting device 8 and auxiliary component 9 will be described in detail below.
[0028] In this embodiment: the connecting device 8 is installed on the surface of the connector 5. The connecting device 8 includes a plug 81 and a hose 83. The plug 81 is the connecting carrier between the hose 83 and the connector 5. The surface is provided with sealing texture to achieve medium sealing in conjunction with the connector 5. The hose 83 is a cooling medium conveying channel. The inner wall is smooth to reduce medium resistance and can be flexibly connected to external conveying pipelines. The plug 81 is inserted into the surface of the connector 5. The hose 83 is installed at the upper end of the plug 81. A moving ring 82 is slidably connected to the surface of the plug 81. A limiting ring 84 is fixedly connected to the surface of the plug 81. A first spring 85 is sleeved and connected to the surface of the plug 81. One end of the first spring 85 is fixedly connected to the upper end of the moving ring 82, and the end of the first spring 85 away from the moving ring 82 is fixedly connected to the lower surface of the limiting ring 84. A moving hole 87 is opened inside the plug 81. A limiting groove 86 is opened on the surface of the connector 5. A limiting rod 88 is slidably connected inside the moving hole 87. One end of the limiting rod 88 is engaged with the inside of the limiting groove 86.
[0029] Specifically, a slider 89 is fixedly connected to the surface of the limiting rod 88, and the slider 89 is slidably connected inside the moving hole 87.
[0030] In this embodiment, by setting a limiting rod 88, the connection between the plug 81 and the connector 5 can be restricted, reducing the difficulty of quickly installing the plug 81 and the connector 5 during use.
[0031] Specifically, a second spring 810 is sleeved and connected to the surface of the limiting rod 88.
[0032] Specifically, one end of the second spring 810 is fixedly connected to the surface of the slider 89, and the other end of the second spring 810 away from the slider 89 is fixedly connected to the inside of the moving hole 87. The second spring 810 is provided to facilitate the application of a reset force to the limit rod 88.
[0033] In this embodiment: an auxiliary component 9 is fixedly provided on the surface of the discharge head 7. The auxiliary component 9 includes a support arm 91 and a retaining ring 92. The support arm 91 is fixedly connected to the outer surface of the discharge head 7. The retaining ring 92 is installed at one end of the support arm 91. A groove 95 is provided at the end of the support arm 91 near the retaining ring 92. A connecting block 94 is fixedly connected to the side of the retaining ring 92. A sliding rod 96 is fixedly connected at the end of the connecting block 94 near the support arm 91. The sliding rod 96 is slidably connected inside the groove 95.
[0034] In this embodiment, by setting the retaining ring 92, the hose 83 can be closely connected to the support arm 91, reducing the difficulty of limiting the hose 83 to the support arm 91 during use.
[0035] Specifically, a third spring 97 is fixedly connected to the end of the slide bar 96 away from the connecting block 94. The end of the third spring 97 away from the slide bar 96 is fixedly connected to the inside of the pull groove 95. The third spring 97 is provided to facilitate the application of a reset spring force to the retaining ring 92.
[0036] Specifically, a pull handle 93 is fixedly connected to the end of the retaining ring 92 away from the support arm 91. The pull handle 93 is provided to facilitate the movement of the retaining ring 92.
[0037] Working principle: The first mounting plate 1, the second mounting plate 2, and the connecting rod 4 form the support frame of the sizing sleeve. The shaping tube 6 is the core shaping structure, with an inner wall smoothness Ra≤0.2μm. Its inner diameter is the target outer diameter of the conduit. The extruded molten conduit enters the shaping tube 6 from one side of the second mounting plate 2 and slides along the inner wall. The mounting barrel 3 is usually hollow inside the cooling jacket. A cooling medium, such as water or coolant, is connected to it through the connector 5 to rapidly cool the conduit inside the shaping tube 6, causing it to solidify and shape. The cooled and solidified conduit exits from the discharge head 7 on one side of the first mounting plate 1. Moving on to the subsequent traction and cutting processes, connector 5, serving as the interface for the cooling medium, needs to be connected to the external delivery pipeline via connecting device 8 to ensure a stable supply of the cooling medium. The flow rate of the cooling medium directly affects the shaping speed and dimensional accuracy of the conduit. Connecting device 8 is used for quick assembly and disassembly of connector 5 and external cooling medium hose 83. When quickly connecting hose 83 and connector 5, plug 81 is fixedly connected to hose 83. During connection, plug 81 is inserted into the interface of connector 5. During connection, the user moves the moving ring 82 towards one end of hose 83, abutting the first... Spring 85 is compressed to generate elastic force. Then, after the moving ring 82 disengages from the surface of the limiting hole, when the plug 81 and connector 5 are fully engaged, the plug 81 abuts against the limiting rod 88, causing the slider 89 to move within the moving hole 87. The movement of the slider 89 compresses the second spring 810, generating elastic force. When the plug 81 is fully engaged with the surface of connector 5, the second spring 810 returns to its original position, abutting the slider 89 to move and engage with the limiting rod 88 inside the limiting groove 86. Then, the restraint of the moving ring 82 is released, and the first spring 85 returns to its original position, abutting the moving ring 82 against the surface of the moving hole 87. The limiting rod 88 is used to restrict the plug 81 and the surface of the connector 5, and the connecting device 8 effectively enables the quick installation of the hose 83 and the connector 5. This reduces the need for bolts and nuts to connect the hose 83 in existing equipment, which requires tools for connection and disassembly. The tools are too cumbersome and result in low installation efficiency for users. This connecting device 8 enables the quick connection of the hose 83 and improves the installation efficiency for users.
[0038] By setting auxiliary component 9, after the user installs the hose 83 onto the surface of the connector 5, the user pulls the handle 93 to move the retaining ring 92 and the connecting block 94. When the connecting block 94 moves, it causes the slide rod 96 to move inside the groove 95. The movement of the slide rod 96 causes the third spring 97 to deform and generate elastic force. Then, the retaining ring 92 disengages from one end of the support arm 91, and the hose 83 is fitted and connected to the surface of the support arm 91. After releasing the restraint of the handle 93, the third spring 97 returns to its original position and pulls the slide rod 96, the connecting block 94, and the retaining ring 92 to move and lock the hose 83 onto the surface of the support arm 91. By setting auxiliary component 9, the hose 83 is effectively limited, thus restricting the hose 83. The function of position 3 is to reduce the risk of the hose 83 being easily impacted by liquid when the cooling medium flows inside the hose 83 after it is connected to the connector 5. This can cause the hose 83 to move and come into prolonged contact with the surface of the first mounting plate 1 of the equipment. Since the temperature of the first mounting plate 1 is between 80 and 90 degrees Celsius for a long time during equipment operation, the hose 83 is prone to damage due to prolonged contact, which can affect the liquid filling of the equipment. This auxiliary component 9 limits the hose 83, prevents the hose 83 from being damaged due to high temperature aging, extends the service life of the hose 83, and prevents the connection device 8 from loosening and leaking due to the movement of the hose 83, ensuring a stable supply of cooling medium and improving the reliability of equipment operation.
[0039] The above description discloses only one or more preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of the present utility model still fall within the scope of the present utility model.
Claims
1. A sizing sleeve for the production of medical catheters, comprising a first mounting plate (1), a second mounting plate (2), a mounting barrel (3), a connecting rod (4), a connector (5), a shaping tube (6), a discharge head (7), and a connecting device (8), characterized in that: The plastic tube (6) is fixedly connected to one end of the first mounting plate (1), and the end of the plastic tube (6) away from the first mounting plate (1) is fixedly connected to the second mounting plate (2). The connecting rod (4) is installed between the first mounting plate (1) and the second mounting plate (2). The surface of the plastic tube (6) is equipped with a mounting bucket (3). The discharge head (7) is fixedly connected to the end of the first mounting plate (1) away from the plastic tube (6). The connecting head (5) is fixedly connected to the surface of the discharge head (7). The connecting device (8) is installed on the surface of the connector (5). The connecting device (8) includes a plug (81) and a hose (83). The plug (81) is inserted into the surface of the connector (5). The hose (83) is installed on the upper end of the plug (81). A movable ring (82) is slidably connected to the surface of the plug (81). A limiting ring (84) is fixedly connected to the surface of the plug (81). A first spring (85) is sleeved on the surface of the plug (81). One end of the first spring (85) is fixedly connected to the upper end of the movable ring (82). The end of the first spring (85) away from the movable ring (82) is fixedly connected to the lower surface of the limiting ring (84). A movable hole (87) is opened inside the plug (81). A limiting groove (86) is opened on the surface of the connector (5). A limiting rod (88) is slidably connected inside the movable hole (87). One end of the limiting rod (88) is engaged with the inside of the limiting groove (86).
2. A sizing sleeve for medical catheter production according to claim 1, characterized in that: The surface of the limiting rod (88) is fixedly connected to a slider (89), which is slidably connected inside the moving hole (87).
3. A sizing sleeve for medical catheter production according to claim 2, characterized in that: A second spring (810) is sleeved and connected to the surface of the limiting rod (88).
4. A sizing sleeve for medical catheter production according to claim 3, characterized in that: One end of the second spring (810) is fixedly connected to the surface of the slider (89), and the other end of the second spring (810) away from the slider (89) is fixedly connected to the inside of the moving hole (87).
5. A sizing sleeve for medical catheter production according to claim 1, characterized in that: An auxiliary component (9) is fixedly provided on the surface of the discharge head (7). The auxiliary component (9) includes a support arm (91) and a retaining ring (92). The support arm (91) is fixedly connected to the outer surface of the discharge head (7). The retaining ring (92) is installed at one end of the support arm (91). A groove (95) is provided at the end of the support arm (91) near the retaining ring (92). A connecting block (94) is fixedly connected to the side of the retaining ring (92). A sliding rod (96) is fixedly connected at the end of the connecting block (94) near the support arm (91). The sliding rod (96) is slidably connected inside the groove (95).
6. A sizing sleeve for medical catheter production according to claim 5, characterized in that: The end of the slide rod (96) away from the connecting block (94) is fixedly connected to a third spring (97), and the end of the third spring (97) away from the slide rod (96) is fixedly connected to the inside of the groove (95).
7. A sizing sleeve for medical catheter production according to claim 6, characterized in that: The end of the retaining ring (92) away from the support arm (91) is fixedly connected to a pull handle (93).