Low-temperature elastic PVC medical catheter material stirring device

Abstract

The utility model discloses a low temperature elasticity PVC medical catheter material stirring device, including stirring jar body (1), be equipped with stirring main shaft (2) in stirring jar body (1), stirring main shaft (2) upper end is equipped with the drive motor (3) of fixed in the top of stirring jar body (1), stirring main shaft (2) bottom is equipped with anchor type paddle (4), and the outer edge of anchor type paddle (4) is equipped with flexible scraper (5), and the middle part of stirring main shaft (2) is equipped with multilayer inclined paddle (6), and stirring main shaft (2) still is equipped with the dispersion gear disc group (7) of being located in the upside and downside of inclined paddle (6). The dispersion gear disc group (7) includes main gear disc (71), and the outside gear disc (72) of gradually decreasing diameter is equipped on the upside of main gear disc (71). The utility model has the characteristics that can effectively promote the uniformity of stirring.

Description

Technical Field

[0001] This utility model relates to a low-temperature elastic PVC medical catheter material mixing device, and more particularly to a low-temperature elastic PVC medical catheter material mixing device. Background Technology

[0002] PVC (polyvinyl chloride) is a commonly used base material for medical catheters. To obtain the low-temperature elasticity (i.e., maintaining good flexibility at low temperatures and not easily hardening or becoming brittle) and high biocompatibility required for clinical applications, various functional additives need to be added to the PVC resin, such as special plasticizers, low-temperature modifiers, heat stabilizers, and lubricants. These additives are added in small quantities. If commonly used high-speed mixers or simple mixing tanks are used for mixing ordinary PVC materials, the functional additives are prone to uneven dispersion, making it difficult to achieve uniform dispersion and resulting in inconsistent catheter performance. Therefore, existing technologies suffer from the problem of uneven mixing. Utility Model Content

[0003] The purpose of this invention is to provide a mixing device for low-temperature elastic PVC medical catheter materials. This invention effectively improves the uniformity of mixing.

[0004] The technical solution of this utility model is as follows: A low-temperature elastic PVC medical catheter material mixing device includes a mixing tank, a mixing main shaft inside the mixing tank, a drive motor fixed to the top of the mixing tank at the upper end of the mixing main shaft, an anchor-type paddle at the bottom of the mixing main shaft, a flexible scraper at the outer edge of the anchor-type paddle, a multi-layer inclined blade in the middle of the mixing main shaft, and a dispersion toothed disc assembly located on the upper and lower sides of the inclined blades on the mixing main shaft; the dispersion toothed disc assembly includes a main toothed disc, and an outer toothed disc with a progressively decreasing diameter is provided on the upper side of the main toothed disc.

[0005] In the aforementioned low-temperature elastic PVC medical catheter material mixing device, the outer toothed disc has an inclined tooth surface structure, and the inclined tooth surface structures of the outer toothed disc located on the upper and lower sides of the inclined blade have opposite inclination directions.

[0006] In the aforementioned low-temperature elastic PVC medical catheter material mixing device, the top of the mixing tank is also provided with an electric lifting rod assembly, and a base is provided above the electric lifting rod assembly, with the drive motor fixed to the base.

[0007] In the aforementioned low-temperature elastic PVC medical catheter material mixing device, the mixing tank is provided with a temperature regulating jacket. The upper end of one side of the temperature regulating jacket is provided with an inlet and the lower end of the other side is provided with an outlet. A thermostat is provided between the inlet and the outlet. The mixing tank is provided with multiple temperature sensors. The temperature sensors are connected to a controller, and the controller is connected to the thermostat.

[0008] Compared with existing technologies, this invention features an anchor-type impeller distributed from bottom to top on the mixing shaft, multiple layers of inclined impeller blades (the inclined turbine impeller ensures effective overall mixing), and a dispersion toothed disc assembly located on the upper and lower sides of the inclined impeller blades (which disperses the material). The dispersion toothed disc assembly consists of a main toothed disc and multiple layers of outer toothed discs with progressively decreasing diameters. Through the synergistic effect of the above-mentioned impeller structures, the material in the tank can be stirred, sheared, and convectioned, thereby effectively improving the mixing uniformity of the material. Simultaneously, the flexible scraper on the edge of the anchor-type impeller can also scrape the wall, preventing material from forming on the wall surface. In summary, this invention effectively improves the mixing uniformity. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] The labels in the attached diagram are: 1-mixing tank, 2-mixing main shaft, 3-drive motor, 4-anchor paddle, 5-flexible scraper, 6-inclined blade, 7-dispersion gear disc assembly, 71-main gear disc, 72-outer gear disc, 8-electric lifting rod assembly, 9-base, 10-temperature regulating jacket. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0012] Example. A low-temperature elastic PVC medical catheter material mixing device, configured as follows: Figure 1 As shown, the system includes a mixing tank 1, a mixing main shaft 2 inside the mixing tank 1, a drive motor 3 fixed to the top of the mixing tank 1 at the upper end of the mixing main shaft 2, an anchor blade 4 at the bottom of the mixing main shaft 2, a flexible scraper 5 on the outer edge of the anchor blade 4, a multi-layer inclined blade 6 in the middle of the mixing main shaft 2, and a dispersion toothed disc assembly 7 located on the upper and lower sides of the inclined blade 6 on the mixing main shaft 2; the dispersion toothed disc assembly 7 includes a main toothed disc 71, and an outer toothed disc 72 with a gradually decreasing diameter on the upper side of the main toothed disc 71.

[0013] The outer toothed disk 72 has an inclined tooth surface structure, and the inclined tooth surface structures of the outer toothed disk 72 located on the upper and lower sides of the inclined blade 6 have opposite inclination directions.

[0014] The tilting directions are opposite, which allows for better disturbance of the material from different directions, promoting material mixing.

[0015] The top of the mixing tank 1 is also provided with an electric lifting rod assembly 8, and a base 9 is provided above the electric lifting rod assembly 8. The drive motor 3 is fixed to the base 9.

[0016] This further expands the mixing range, which in turn helps to improve the uniformity of mixing.

[0017] The mixing tank 1 is provided with a temperature regulating jacket 10. The temperature regulating jacket 10 has an inlet at the upper end of one side and an outlet at the lower end of the other side. A thermostat is provided between the inlet and the outlet. The mixing tank 1 is provided with multiple temperature sensors. The temperature sensors are connected to a controller, and the controller is connected to the thermostat.

[0018] The tank has a feeding port on the side of the top and a discharge port and an electric discharge valve in the middle of the bottom.

[0019] The mixing process of this invention is as follows: Materials and various functional additives are fed into the mixing tank through the feeding port. The drive motor starts working, driving the mixing shaft to rotate, which in turn drives the anchor blade, flexible scraper, inclined blade, and dispersion toothed disc assembly to rotate. These components stir, mix, disperse, shear, and convect the materials in the mixing tank, promoting rapid and uniform mixing of the functional additives with the PVC material. Simultaneously, the temperature of the mixing tank is controlled by the temperature-regulating liquid in the temperature-regulating jacket. The material temperature is monitored by a temperature sensor. When the temperature is too high or too low, the thermostat is controlled to perform corresponding temperature adjustment actions (when the temperature is too high, a low-temperature heat exchange liquid is pumped in at a set flow rate for heat exchange; when the temperature is too low, a high-temperature heat exchange liquid is pumped in at a set flow rate for heat exchange).

[0020] At the same time, this application also expands the mixing range and improves the mixing uniformity by setting a lifting cycle and raising and lowering the electric lifting rod assembly to drive the mixing main shaft and corresponding mixing blades to lift and lower periodically.

[0021] Preferably, the temperature-regulating jacket comprises three independently distributed layers (upper, middle, and lower), each layer having a corresponding inlet and outlet. The inlet and outlet are independently connected to a thermostat via pipes and a liquid delivery pump, respectively. Temperature sensors are installed inside the tank for corresponding areas to monitor the temperature in those areas. This application, through zoned design, allows for precise temperature control in different zones based on the mixing state and temperature distribution at different heights (typically, more frictional heat is generated at the bottom), ensuring minimal temperature gradient across the entire material layer and achieving uniformity.

Claims

1. A low-temperature elastic PVC medical catheter material mixing device, characterized in that: The system includes a mixing tank (1), a mixing main shaft (2) inside the mixing tank (1), a drive motor (3) fixed to the top of the mixing tank (1) at the upper end of the mixing main shaft (2), an anchor paddle (4) at the bottom of the mixing main shaft (2), a flexible scraper (5) at the outer edge of the anchor paddle (4), a multi-layer inclined blade (6) in the middle of the mixing main shaft (2), and a dispersion toothed disc assembly (7) located on the upper and lower sides of the inclined blade (6) on the mixing main shaft (2); the dispersion toothed disc assembly (7) includes a main toothed disc (71), and an outer toothed disc (72) with a gradually decreasing diameter is provided on the upper side of the main toothed disc (71).

2. The low-temperature elastic PVC medical catheter material mixing device according to claim 1, characterized in that: The outer toothed disk (72) has an inclined tooth surface structure, and the inclined tooth surface structures of the outer toothed disk (72) located on the upper and lower sides of the inclined blade (6) have opposite inclination directions.

3. The low-temperature elastic PVC medical catheter material mixing device according to claim 1, characterized in that: The top of the mixing tank (1) is also provided with an electric lifting rod assembly (8), and a base (9) is provided above the electric lifting rod assembly (8), with the drive motor (3) fixed to the base (9).

4. The low-temperature elastic PVC medical catheter material mixing device according to claim 1, characterized in that: The mixing tank (1) is provided with a temperature regulating jacket (10). The upper end of one side of the temperature regulating jacket (10) is provided with an inlet and the lower end of the other side is provided with an outlet. A thermostat is provided between the inlet and the outlet. The mixing tank (1) is provided with multiple temperature sensors. The temperature sensors are connected to a controller, and the controller is connected to the thermostat.

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