CN215780388U

CN215780388U - Medical retention-free water conveying system

Info

Publication number: CN215780388U
Application number: CN202122218175.8U
Authority: CN
Inventors: 鲍志国; 鲍义康; 罗莉丽
Original assignee: Europe Asia Fluid Technique Development Co ltd Hangzhou
Current assignee: Europe Asia Fluid Technique Development Co ltd Hangzhou
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-02-11
Anticipated expiration: 2031-09-14

Abstract

The utility model belongs to the field of medical equipment, and particularly relates to a medical retention-free water conveying system which is characterized by comprising a main conveying pipe and a water return pipe, wherein the tail end of the main conveying pipe is connected with the head end of the water return pipe in a matched mode through a pressure limiting valve, at least one conveying branch pipe is connected to the main conveying pipe in a matched mode, a water conveying interface used for being connected with pure water receiving equipment in a matched mode is arranged on each conveying branch pipe, and the tail end of each conveying branch pipe is connected with the water return pipe in a matched mode. The utility model is provided with the water return pipe and the pressure limiting valve, the tail end of the conveying branch pipe is connected to the water return pipe, the water pressure of the main conveying pipe is controlled to be always higher than that of the water return pipe through the pressure limiting valve, and the residual water in the conveying branch pipe can directly flow to the water return pipe, so that the water retention is avoided, and the breeding of bacteria and bacterial endotoxin is further avoided.

Description

Medical retention-free water conveying system

Technical Field

The utility model belongs to the field of medical equipment, and particularly relates to a medical retention-free water conveying system.

Background

Prior art 1: in the case of pure water supply for hemodialysis, for example, when the system supplies treated pure water to each hemodialysis machine 2 for use, a branch line is usually branched from the main line, and the form is shown in fig. 1, in which 1 is the main line, 2 is the hemodialysis machine, and 3 is the branch line. Due to discontinuous work of the hemodialysis machine (usually, daytime running, night and weekend stopping), when the hemodialysis machine stops running, the conveying branch pipe becomes a blind pipe, so that accumulated water in the conveying branch pipe becomes stagnant water which is easy to breed bacteria and bacterial endotoxin, and the hemodialysis machine becomes a risk source of potential unqualified water quality when working again.

Prior art 2: subsequently, it has been proposed to solve the above drawbacks by using a "U" process on the same main duct, which is shown in fig. 2, in which 1 is the main duct, 2 is the hemodialysis machine, and 3 is the branch duct. The general knowledge of fluid mechanics suggests that to make pure water in the main delivery pipe flow from point a to point "U" B for the hemodialysis machine, the remaining water flows to point C and is collected in the main delivery pipe, and that point A, C must have a certain head pressure difference (i.e., vector energy), and the fact is that the pressure difference between the water delivered at points a and C connected to the "U" pipe is almost O. Thus, the "U" tube shown in FIG. 2 not only does not allow flow from point A to point C through the "U" tube from point B, but also doubles the amount of saline produced when the hemodialysis machine is shut down as compared to that shown in FIG. 1.

SUMMERY OF THE UTILITY MODEL

In order to make up the defects of the prior art, the utility model provides a technical scheme of a medical retention-free water delivery system.

The utility model provides a medical no stagnant water conveying system which characterized in that, includes main conveyer pipe and wet return, and the end of main conveyer pipe is passed through the pressure-limiting valve cooperation with the head end of wet return and is connected, at least one delivery branch pipe is connected in the cooperation on the main conveyer pipe, delivery branch pipe is last have be used for with the water delivery interface that pure water receiving equipment cooperation is connected, delivery branch pipe the end with the wet return cooperation is connected.

The medical retention-free water conveying system is characterized in that the tail end of the water return pipe is connected with the head end of the main conveying pipe or the raw water end of the main conveying pipe in a matched mode, and conveying water forms a circulating loop through the main conveying pipe and the water return pipe.

The medical retention-free water conveying system is characterized in that the conveying interface is positioned at any position of the middle section of the conveying branch pipe.

The medical retention-free water conveying system is characterized in that the pure water receiving equipment is a hemodialysis machine.

The medical retention-free water conveying system is characterized in that the conveying branch pipe is a hose.

Compared with the prior art, the water return pipe and the pressure limiting valve are arranged, the tail ends of the conveying branch pipes are connected to the water return pipe, the water pressure of the water return pipe is limited through the pressure limiting valve, and the residual water in the conveying branch pipes can directly flow to the water return pipe, so that water retention is avoided, and breeding of bacteria and bacterial endotoxin is further avoided.

Drawings

FIG. 1 is a schematic diagram of a water delivery system in prior art 1;

FIG. 2 is a schematic diagram of a water delivery system of prior art 2;

fig. 3 is a schematic structural view of a medical retention-free water delivery system provided by the utility model.

Detailed Description

In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of the present invention and to simplify the description, but do not indicate or imply that the device or element being 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 invention.

The utility model will be further explained with reference to the drawings.

Referring to fig. 3, a medical retention-free water delivery system includes a main delivery pipe 1 and a return pipe 5, a tail end of the main delivery pipe 1 is connected to a head end of the return pipe 5 by a pressure limiting valve 4, the main delivery pipe 1 is connected to at least one delivery branch pipe 3, the delivery branch pipe 3 is provided with a water delivery interface B for connecting with the pure water receiving device, and a tail end of the delivery branch pipe 3 is connected to the return pipe 5. Wherein, the delivery branch pipe 3 is a hose which meets the water supply pressure of the pure water receiving equipment.

Further, the tail end of the water return pipe 5 is connected with the head end of the main conveying pipe 1 or the raw water end of the main conveying pipe 1 in a matching manner, so that the main conveying pipe 1 and the water return pipe 5 form a circulation loop.

With continued reference to fig. 3, the conveying interface B is located at any position in the middle of the conveying branch pipe 3.

With continuing reference to fig. 1, the pure water receiving device is a hemodialysis machine 2, and the following description will be given for n hemodialysis machines 2 as an example to explain the principles of the present invention:

due to different brands of hemodialysis machines, the required water supply pressure is usually between 1.1bar and 2.5bar, and the alarm pressure is about 3.5 bar. The design of the utility model is that the conveying water pressure is more than or equal to 3.0bar, and the pressure relief critical value of the pressure limiting valve 4 is 3.3bar (the critical pressure value can be adjusted according to the lowest alarm pressure in n hemodialysis machines 2). The pressure difference required by design is formed before and after the pressure limiting valve 4 due to the action of the pressure limiting valve 4, so that the water pressure in the water return pipe 5 is maintained at normal pressure or slightly higher than the normal pressure, when the main conveying pipe 1 supplies water to the hemodialysis machine 2, pure water flows out from the joint A and supplies water to the hemodialysis machine 2 through the conveying joint B, and the residual water naturally gathers in the water return pipe 5 through the joint C and flows to the conveying origin under the pushing of the pressure difference. Therefore, even if the hemodialysis machine 2 stops working, the conveying water flowing out from the point A can continuously flow from the point B to the point C through the conveying interface, so that the water retention is avoided, and the breeding of bacteria and bacterial endotoxin is further avoided.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a medical no stagnant water conveying system, its characterized in that, includes main conveyer pipe (1) and wet return (5), the end of main conveyer pipe (1) is passed through pressure-limiting valve (4) cooperation with the head end of wet return (5) and is connected, at least one delivery branch pipe (3) is connected in the cooperation on main conveyer pipe (1), delivery branch pipe (3) go up have for with water delivery interface (B) that pure water receiving equipment cooperation is connected, the end of delivery branch pipe (3) with wet return (5) cooperation is connected.

2. The medical retention-free water delivery system according to claim 1, wherein the end of the water return pipe (5) is connected with the head end of the main delivery pipe (1) or the raw water end of the main delivery pipe (1) in a matching manner, so that the delivery water forms a circulation loop through the main delivery pipe (1) and the water return pipe (5).

3. The medical retention-free water delivery system according to claim 1, wherein the delivery port (B) is located at any position in the middle of the delivery branch (3).

4. A medical retention-free water delivery system according to claim 1, wherein the pure water receiving device is a hemodialysis machine (2).

5. The medical retention-free water delivery system according to claim 1, wherein the delivery manifold (3) is a hose.