Specialist devices for patients after surgery. It is a kit set, including two radial connectors (one blue and one white, also them as pagoda connector), one cornical connector (transparent), and three threaded luer locks. Six of them are universally used to slove all the turing connection problems after surgery. Using them, no need worrying about leakage, disconnection, size dismatching and others. For blue pagoda connector, it suits with the tubing diameter more than 16Fr, and the white one are applied with the tubings from 3Fr to 16Fr.
The urine bag set consists of A drainage bag and A suction device. Qhy-a is the single drainage bag, and qhy-b is the drainage bag + suction device. The drainage bag consists of the bag body, catheter, lifting lug, joint, guard cap, drainage port, drainage bottom plug, anti-reflux device, and current limiting clip.The suction device is composed of negative pressure bottle, drainage tube joint, suction tube joint, suction connection pipe, automatic drainage device, drainage port and bag body.Should be sterile.
It is used for the collection of body fluids (blood, gastric juice, etc.), secretions (sputum, flushing fluid, etc.) and human excreta (urine, etc.) in hospital, clinical departments and during surgery or after surgery.
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2. Working principle and structure The upper surface of the hyperboloid impeller body is a hyperboloid structure formed by the rotation of the hyperbolic busbar around the axis of the impeller body. With its unique impeller design, Zui combines fluid properties with mechanical motion. The equation of the hyperbola is a curved body formed by the xy=b curve rotating along the y-axis; in order to cater for the flow of water, the design is introduced from the center of the impeller, which reduces the influent turbulence and ensures the liquid to impeller. The pressure on the surface is uniform, thus ensuring the balance of the whole machine under motion. Eight guiding vanes are evenly distributed on the involute double arc surface, and the potential energy obtained by supplementing the influent water with the liquid self-weight pressure forms a kinetic energy with the centrifugal force generated when the impeller rotates, and the liquid is transformed along the impeller by the hyperbolic structure under the action of gravity acceleration. The circumferential direction is a tangential motion, and under the reflection of the pool wall, a water flow is formed from top to bottom, so that a cross flow in the axial (y) and radial (x) directions can be obtained (see Figs. 1, 2). It is precisely because of the structural characteristics of the impeller of the vertical pulsator and the characteristics of the installation near the bottom of the tank. Its working position determines its anti-settling effect on the suspended solids is direct, and the ideal stirring effect can be obtained in the work, which can effectively Eliminate the dead angle of mixing. A large specific surface area allows for a large area of ​​water exchange.
The impeller structure is composed of a fluid guiding body, a stirring part and a transmission part (Fig. 3).
3. Engineering application The vertical pulsator mixer consists of a power part and a hyperboloid impeller body and mounting accessories. In order to meet the user's use under different working conditions, the installation will be designed as dry (also called vertical shaft) and submersible. Two kinds (Figures 4 and 5). Dry installation, using the bridge positioning by the transmission, powered by dry motor and reducer, it is used in liquid with high solid content, high water temperature and abrasiveness. Because the impeller has automatic correcting function, it runs smoothly and decelerates. Machine noise is less than 60 decibels. Submersible installation, can avoid the bridge, using diving power, using equipment self-relocation, flexible installation, suitable for deep water depth, stable water quality, non-abrasive water body, water temperature is not more than 40 ° C, PH value 6 ~ 9 Between, it is characterized by no noise and no visual impairment.
In practical applications, the conical counter-surface design of the impeller greatly distributes the pressure of the liquid on the surface of the impeller through the guide fluid to the diffusion zone of the foliar surface, and uses the unequal lobes of the impeller surface to change the direction of fluid motion. , along the tangential direction of the outer edge of the impeller, centrifugal force is formed under the acceleration of gravity, and converted into a radial flow. The advantage of its large size is that the impeller does not generate turbulent flow during operation, thus ensuring that the influent zone and the outflow zone do not interfere with each other. The orderly flow of water flows plus the negative pressure formed from the impeller center during impeller operation. The energy formation in the water zone is automatically supplemented, i.e., an axial flow is created such that the vertical pulsator produces axial and radial flow even without reflection from the cell wall. At present, the depths of the two users in Beijing and Shanghai are more than 8 meters. From the actual work situation, the mixing effect is very satisfactory. It can be seen that the water depth has little effect on the hyperboloid. If the traditional mixer is difficult to achieve such effect in such a situation, this is the limitation of the horizontal mixer. Because horizontal agitation can only solve a laminar flow, its axial flow and radial flow can not reach the service area of ​​hyperboloids, especially in the boundary water flow of the mixer, it is easy to generate turbulence, and it is difficult to add one-way water flow. It satisfies the complete agitation at the bottom of the pool and at the corner of the pool, especially in the anaerobic section, which is prone to sedimentation. In addition, the difference between the commonly used paddle stirring method and the horizontal stirring is that the paddle mixer is mainly radial flow, and the shearing force is strong. The horizontal mixer is mainly axial flow, the radial flow is small, and the pushing ability is strong. If you want to increase the mixing effect, you can only increase the power and speed. The reflection principle of the wall can be used to form the backflow. However, for large-scale and dead-end working conditions, as the power and speed increase, many problems such as increased energy consumption, structural reliability, and the like are entangled.
4. Working characteristics As a high-efficiency mixing and mixing device, the vertical pulsator is suitable for mixing and mixing between various low-viscosity liquids, solid-liquid, gas-liquid; not only for circular pools and square pools, The use of sub-units in rectangular pools is also more common.
In the existing various sewage treatment processes in China, the vertical pulsator mixer can overcome the problem that the traditional blade (pulp) type mixing is easy to appear dead angle, the mixing effect of the aeration process water and gas is not good, and the advantage of uniform stirring is exerted. The main features are as follows:
(1) It can be used in the case of mixing various liquids with solids and gases. It can replace the existing mixing equipment to achieve three-dimensional and spiral mixing, which makes the mixing more uniform and improves the mixing efficiency.
(2) Large specific surface area impeller, small power supply, large circulating water flow, low energy consumption, energy saving 30%-50% compared with traditional mixing method in conventional municipal sewage mixing.
(3) The whole machine has compact structure, reliable operation and convenient installation and maintenance.
(4) The impeller is made of reinforced fiber or steel material, which can adapt to different working conditions and has a long service life.
5. Application prospects As a kind of energy-saving and high-efficiency mixing and agitating device, the vertical pulsator is widely used in the mixing of two-phase solid-liquid or three-phase solid-liquid gas. At present, due to the increasingly serious environmental pollution and the improvement of environmental awareness in the whole society, sewage treatment has been paid more and more attention. The sewage treatment rate of small and medium-sized cities in China has gradually increased. At the same time, the upgrading of existing sewage treatment plants will inevitably be energy efficient. The critical equipment technology creates an urgent need, and the hyperboloid impeller agitation scheme has obvious advantages in water mixing and energy saving. Therefore, through correct and positive promotion, we believe that this hyperboloid mixing scheme will become the ideal and leading mixing method in the future, playing an important role in the sewage treatment process and other mixing and mixing places.
1. Introduction In the municipal, chemical paper and other various water treatment processes, water mixing and mixing is one of the key processes. The traditional mixing machinery is divided into two types: vertical shaft folding type and horizontal (diving) type. Because of the way of installation and the shape of the blade paddle, the stirring mode is not ideal in terms of energy consumption or stirring effect. Not only will it bring unnecessary increase to the operating cost of the sewage plant, but it will directly affect the final processing effect of the Zui.