Temperature-resistant and pressure-resistant circulation pipeline assembly based on Venturi differential pressure principle

Abstract

The embodiment of the utility model provides a temperature-resistant and pressure-resistant circulation pipeline assembly based on the Venturi differential pressure principle. The temperature-resistant and pressure-resistant circulation pipeline assembly comprises a branch pipe assembly. The branch pipe assembly comprises a metal connecting pipe fitting, a metal three-way connector, a first branch hose, a second branch hose and a metal inserting connector. The first branch hose and the second branch hose are temperature-resistant and pressure-resistant hoses, and the pipe wall of each temperature-resistant and pressure-resistant hose at least comprises a circle of metal woven mesh. According to the embodiment of the scheme, the venturi principle is utilized, and liquid in the cavity can form circulating liquid flow in the first branch hose, the metal three-way connector, the second branch hose and the cavity. The metal connecting pipe fitting, the metal three-way connector, the first branch hose, the second branch hose and the metal inserting connector are all temperature-resistant and pressure-resistant parts, and high-temperature and high-pressure liquid can be adopted to be introduced into the branch pipe assembly in the process of disinfecting the branch pipe assembly, so that high-temperature and high-pressure disinfection and sterilization of the branch pipe assembly are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a temperature-resistant and pressure-resistant circulation pipeline component utilizing the Venturi pressure difference principle. Background Art

[0002] The kidneys are important organs in the human body. They are responsible for filtering waste from the blood and maintaining the body's electrolyte balance. When the kidneys are damaged and cannot effectively complete these tasks, a hemodialysis machine is needed to dialysis the body.

[0003] During the dialysis process, the patient's blood will pass through the dialyzer and exchange substances with the dialysis water through the semi-permeable membrane to remove waste from the human body. Therefore, dialysis water must meet strict pure water standards, such as the quality standards of dialysis water, microbial limits, bacteria and endotoxin levels, etc., to ensure that no harmful substances are introduced into the human body during the dialysis process.

[0004] In practice, in large medical facilities, a main dialysis water pipeline is generally used, and branch pipelines made of single-layer plastic pipes are connected to dozens of dialyzers. After the dialyzer is turned on, the dialysis water in the main dialysis water pipeline flows through the branch pipeline into the turned-on dialyzer to supply water to the dialysis machine. After the dialyzer is turned off, the branch pipeline no longer supplies water to the closed dialyzer. Therefore, the liquid flow at the branch pipeline is weak, which is easy to breed bacteria. Utility Model Content

[0005] The purpose of the utility model is to provide a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle to improve the safety of dialysis water. The specific technical solution is as follows:

[0006] In order to achieve the above-mentioned purpose, the first embodiment of the utility model proposes a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle, comprising:

[0007] A branch pipe assembly, the branch pipe assembly comprising:

[0008] A metal connecting pipe fitting, wherein one end of the metal connecting pipe fitting has a first interface, the other end of the metal connecting pipe fitting has a second interface, the metal connecting pipe fitting has a cavity connecting the first interface and the second interface, and in the direction from the first interface of the metal connecting pipe fitting to the second interface of the metal connecting pipe fitting, the metal connecting pipe fitting is sequentially provided with a third interface and a fourth interface, the third interface is connected to a first position of the cavity, and the fourth interface is connected to a second position of the cavity;

[0009] The second position in the cavity has a throttling structure to limit the radial cross-sectional area of ​​the water flow channel at the second position in the cavity, so that the liquid flow rate and liquid pressure of the liquid flowing through the cavity at the first position of the cavity are different from the liquid flow rate and liquid pressure at the second position of the cavity;

[0010] A metal three-way connector, the metal three-way connector comprising a first connection port, a second connection port and a third connection port, wherein the first connection port, the second connection port and the third connection port are connected;

[0011] A first branch hose, connected to the third interface of the metal connecting pipe and the first connection port of the metal three-way connector;

[0012] A second branch hose is connected to the fourth interface of the metal connecting pipe and the second connection port of the metal three-way connector;

[0013] A metal plug connector is connected to the third connection port of the metal three-way connector; wherein,

[0014] The first branch hose and the second branch hose are both temperature-resistant and pressure-resistant hoses, and the tube wall of the temperature-resistant and pressure-resistant hose includes at least one circle of metal braided mesh.

[0015] According to an embodiment of the utility model, the water pressure resistance of the heat-resistant and pressure-resistant hose is greater than or equal to 1 MPa, and the high temperature resistance of the heat-resistant and pressure-resistant hose is greater than or equal to 150°C.

[0016] According to one embodiment of the utility model, the heat-resistant and pressure-resistant hose comprises: an inner layer tube of silicone, a middle layer tube made of a metal woven mesh, and an outer layer protective tube, wherein the middle layer tube is arranged between the inner layer tube and the outer layer protective tube; or, the heat-resistant and pressure-resistant hose comprises: a metal pipe mesh formed by a metal woven mesh and a high-temperature resistant silicone tube filled in the metal pipe mesh.

[0017] According to one embodiment of the utility model, it also includes: a main water supply pipeline and a high-temperature water disinfection circulation device; there are multiple branch pipe assemblies, and the first interface and the second interface of each branch pipe assembly are connected in series to the main water supply pipeline, so that the multiple branch pipe assemblies are connected in series to the main water supply pipeline in sequence; the circulating water inlet of the high-temperature water disinfection circulation device and the circulating water outlet of the high-temperature water disinfection circulation device are connected in series to the main water supply pipeline to form a circulating disinfection pipeline.

[0018] According to one embodiment of the utility model, the high-temperature water disinfection circulation device includes: a water temperature heater, a water pressure booster, a circulating water pump and a controller; the main water supply pipeline, the water temperature heater, the water pressure booster and the circulating water pump are connected in series, and the controller is electrically connected to the water temperature heater, the water pressure booster and the circulating water pump, respectively.

[0019] According to an embodiment of the utility model, the high-temperature water disinfection circulation device further includes: a drain valve, and the drain valve is arranged on the main water supply pipeline.

[0020] According to an embodiment of the present utility model, the ratio of the radial cross-sectional area of ​​the water flow channel of the main water supply pipeline to the radial cross-sectional area of ​​the water flow channel of the temperature-resistant and pressure-resistant hose is between 2 and 3.

[0021] According to one embodiment of the utility model, the throttling structure is an elastic ring lining, which is arranged on the inner wall of the second position in the cavity, and the elastic ring lining has a channel connecting the cavity and the fourth interface; when there is a fluid with a first pressure in the cavity, the elastic ring lining undergoes a first elastic deformation, and the elastic ring lining has a first radial cross-sectional area of ​​the water flow channel; when there is a fluid with a second pressure in the cavity, the elastic ring lining undergoes a second elastic deformation, and the elastic ring lining has a second radial cross-sectional area of ​​the water flow channel; the second pressure is less than the first pressure, and the radial cross-sectional area of ​​the second water flow channel is less than the radial cross-sectional area of ​​the first water flow channel.

[0022] According to an embodiment of the utility model, the sealing connection structure between the first branch hose and the third interface of the metal connecting pipe and the sealing connection structure between the second branch hose and the fourth interface of the metal connecting pipe are both spherical seals.

[0023] According to one embodiment of the utility model, the third interface of the metal connecting pipe fitting includes: a conical joint, a spherical joint and a connecting nut; the first end of the conical joint has a conical interface, which is located outside the cavity, and the second end of the conical joint extends into the cavity; the first end of the spherical joint has a spherical interface, and the spherical interface and the conical interface are connected; the connecting nut locks the spherical interface to the conical joint.

[0024] The technical solution provided by this embodiment has at least one of the following advantages:

[0025] In the technical solution provided by the embodiment of the present scheme, the temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle includes: a branch pipe assembly. The branch pipe assembly includes: a metal connecting pipe, a metal three-way connector, a first branch hose, a second branch hose and a metal plug joint. One end of the metal connecting pipe has a first interface, and the other end of the metal connecting pipe has a second interface. The metal connecting pipe has a cavity connecting the first interface and the second interface. In the direction from the first interface of the metal connecting pipe to the second interface of the metal connecting pipe, the metal connecting pipe is sequentially provided with a third interface and a fourth interface. The third interface connects to the first position of the cavity, and the fourth interface connects to the second position of the cavity. The second position in the cavity has a throttling structure to limit the radial cross-sectional area of ​​the water flow channel at the second position in the cavity, so that the liquid flowing through the cavity has a liquid flow rate, a liquid pressure and a liquid pressure at the first position of the cavity. The liquid flow rate and liquid pressure at the second position of the body are different; the metal three-way connector includes a first connection port, a second connection port and a third connection port, and the first connection port, the second connection port and the third connection port are connected; the first branch hose connects the third interface of the metal connecting pipe and the first connection port of the metal three-way connector; the second branch hose connects the fourth interface of the metal connecting pipe and the second connection port of the metal three-way connector; the metal plug joint connects the third connection port of the metal three-way connector; wherein, the first branch hose and the second branch hose are both temperature-resistant and pressure-resistant hoses, and the tube wall of the temperature-resistant and pressure-resistant hose contains at least one circle of metal braided mesh. The embodiment of the present solution provides a heat-resistant and pressure-resistant circulating pipeline assembly using the Venturi pressure difference principle. On the one hand, the Venturi principle is used. The radial cross-sectional area of ​​the water flow channel at the first position in the cavity is different from the radial cross-sectional area of ​​the water flow channel at the second position in the cavity. Therefore, the liquid pressure at the first position and the second position of the cavity will be different. Therefore, the liquid in the cavity will form a circulating liquid flow in the first branch hose, the metal three-way connector, the second branch hose and the cavity, thereby improving the safety of the water used for dialysis. On the other hand, the branch pipe assembly is prone to breed bacteria after being used for a period of time. The metal connecting pipe fittings, the metal three-way connector, the first branch hose, the second branch hose and the metal plug connector are all heat-resistant and pressure-resistant components. When disinfecting the branch pipe assembly, a high-temperature and high-pressure liquid can be used to pass into the branch pipe assembly to achieve high-temperature and high-pressure disinfection and sterilization of the branch pipe assembly, thereby further improving the safety of the water used for dialysis.

[0026] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 It is a structural schematic diagram of a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to one embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of a radial cross-sectional structure of a temperature-resistant and pressure-resistant hose in a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to an embodiment of the utility model;

[0030] Figure 3 It is a structural schematic diagram of a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to another embodiment of the utility model;

[0031] Figure 4 It is a structural schematic diagram of a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to another embodiment of the utility model;

[0032] Figure 5 It is a schematic diagram of the disassembled structure of a conical joint, a spherical joint and a connecting nut in a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to another embodiment of the utility model.

[0033] The reference numerals are as follows:

[0034] Branch pipe assembly 100, metal connecting pipe 10, cavity 11, throttling structure 12, first interface 10a, second interface 10b, third interface 10c, fourth interface 10d, metal three-way connector 20, first branch hose 30, second branch hose 40, metal plug connector 50, inner layer tube 61, middle layer tube 62, outer layer protective tube 63, elastic ring liner 80, conical joint 91, conical interface 911, spherical joint 92, spherical interface 921, retaining ring 922, connecting nut 93, stepped groove 931;

[0035] Main water supply pipeline 200, high temperature water disinfection circulation device 300, dialyzer 400, water supply device 500. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of the utility model.

[0037] Dialysis water is specifically used for dialysis treatment. During the dialysis process, the patient's blood will pass through the dialyzer, exchange substances with the dialysate through a semipermeable membrane, and remove waste from the body. Therefore, dialysis water must meet strict hygiene standards to ensure the safety of dialysis. In the related art, the dialysis water pipeline is made of plastic material, which cannot withstand high temperature and high pressure and can only be used under normal temperature and pressure. In order to ensure the safety of the branch pipelines of the dialysis water pipeline, it is necessary to regularly maintain and manage the dialysis water pipeline. For example, the dialysis water pipeline is replaced regularly to ensure the purity and safety of the dialysis water quality. However, this maintenance and management method is time-consuming and labor-intensive, and the operation is inconvenient. If the method of boiling water at room temperature is adopted, a long disinfection time is required, and the time cost of maintenance and management is high.

[0038] To this end, the utility model proposes a temperature-resistant and pressure-resistant circulation pipeline component utilizing the Venturi pressure difference principle.

[0039] Specifically, a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0040] Figure 1 : is a schematic structural diagram of a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to an embodiment of the present invention, such as Figure 1As shown, a temperature-resistant and pressure-resistant circulation pipeline assembly utilizing the Venturi pressure difference principle of an embodiment of the utility model includes: a branch pipe assembly 100, and the branch pipe assembly 100 includes: a metal connecting pipe fitting 10, a metal three-way connector 20, a first branch hose 30, a second branch hose 40 and a metal plug joint 50. One end of the metal connecting pipe 10 has a first interface 10a, and the other end of the metal connecting pipe 10 has a second interface 10b. The metal connecting pipe 10 has a cavity 11 connecting the first interface 10a and the second interface 10b. In the direction from the first interface 10a of the metal connecting pipe 10 to the second interface 10b of the metal connecting pipe 10, the metal connecting pipe 10 is sequentially provided with a third interface 10c and a fourth interface 10d, the third interface 10c is connected to the first position of the cavity 11, and the fourth interface 10d is connected to the second position of the cavity 11; the second position in the cavity 11 has a throttling structure 12 to limit the radial cross-sectional area of ​​the water flow channel at the second position in the cavity 11, so that the liquid flowing through the cavity 11 is at the first position of the cavity 11. The liquid flow rate, liquid pressure and the liquid flow rate and liquid pressure at the second position of the cavity 11 are different; the metal three-way connector 20 includes a first connection port, a second connection port and a third connection port, and the first connection port, the second connection port and the third connection port are connected; the first branch hose 30 connects the third interface 10c of the metal connecting pipe 10 and the first connection port of the metal three-way connector 20; the second branch hose 40 connects the fourth interface 10d of the metal connecting pipe 10 and the second connection port of the metal three-way connector 20; the metal plug connector 50 connects the third connection port of the metal three-way connector 20; wherein, the first branch hose 30 and the second branch hose 40 are both temperature-resistant and pressure-resistant hoses, and the tube wall of the temperature-resistant and pressure-resistant hose contains at least one circle of metal braided mesh.

[0041] The heat-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle provided by the embodiment of the present solution, on the one hand, utilizes the Venturi principle, and the second position in the cavity 11 has a throttling structure 12 to limit the radial cross-sectional area of ​​the water flow channel at the second position in the cavity 11. Therefore, the liquid flowing through the cavity 11 has a liquid flow rate at the first position of the cavity 11 that is less than the liquid flow rate at the second position of the cavity 11, and the liquid pressure at the first position of the cavity 11 is greater than the liquid pressure at the second position of the cavity 11, so that the liquid in the cavity 11 forms a circulating liquid flow in the first branch hose 30, the metal three-way connector 20, the second branch hose 40 and the cavity 11. The metal plug connector 50 is used to connect with the dialyzer 400 so that the branch pipe assembly 100 supplies water to the dialyzer 400. After the dialyzer 400 is closed, it can prevent the formation of a dead flow of liquid in the branch pipe assembly 100 connected to the closed dialyzer 400, thereby improving the safety of dialysis water.

[0042] On the other hand, the branch pipe assembly 100 is prone to breed bacteria after being used for a period of time. In the embodiment of the present scheme, the metal connecting pipe fitting 10, the metal three-way connector 20, the first branch hose 30, the second branch hose 40 and the metal plug joint 50 are all temperature-resistant and pressure-resistant components. When disinfecting the branch pipe assembly 100, high-temperature and high-pressure liquid can be used to pass into the branch pipe assembly 100 through the first interface 10a and the second interface 10b of the metal connecting pipe fitting 10 (the metal plug joint 50 can be sealed separately, or it can be closed by the pipeline valve of the dialyzer 400 connected thereto), so as to achieve high-temperature and high-pressure rapid and efficient disinfection and sterilization of the branch pipe assembly 100, thereby further improving the safety of dialysis water.

[0043] For example, the water pressure resistance of the heat-resistant and pressure-resistant hose is greater than or equal to 1 MPa, and the high temperature resistance of the heat-resistant and pressure-resistant hose is greater than or equal to 150° C. In the regular disinfection and maintenance of the branch pipe assembly 100, high-temperature and high-pressure circulating water at 121° C. is passed into the branch pipe assembly 100 and circulated for more than 30 minutes to achieve disinfection and sterilization maintenance of the branch pipe assembly 100.

[0044] Specifically, in the technical solution for realizing a heat-resistant and pressure-resistant hose, the heat-resistant and pressure-resistant hose may include a metal pipe mesh formed by a metal woven mesh and a high-temperature resistant silicone tube filled in the metal pipe mesh. The high-temperature resistant silicone tube and the metal pipe mesh are combined to form a heat-resistant and pressure-resistant hose.

[0045] Figure 2 FIG. 1 is a schematic diagram of a radial cross-sectional structure of a heat-resistant and pressure-resistant hose in a heat-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to an embodiment of the utility model, as shown in FIG. Figure 2As shown, in some other embodiments, for the convenience of production, the temperature-resistant and pressure-resistant hose includes: an inner layer tube 61 of silicone, a middle layer tube 62 made of a metal woven mesh, and an outer layer protective tube 63, wherein the middle layer tube 62 is arranged between the inner layer tube 61 and the outer layer protective tube 63. The inner layer tube 61 of silicone and the outer layer protective tube 63 are both made of high temperature resistant materials. The middle layer tube 62 made of a metal woven mesh is wrapped around the outer layer of the inner layer tube 61 of silicone, and the outer layer protective tube 63 is wrapped around the outer layer of the middle layer tube 62 made of a metal woven mesh.

[0046] Figure 3 FIG. 1 is a schematic structural diagram of a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to another embodiment of the present invention. Figure 3 As shown, in the embodiment of the present application, during the disinfection of the branch pipe assembly 100, it is possible to implement it without performing a disassembly operation. Specifically, in implementation, the above-mentioned temperature-resistant and pressure-resistant circulating pipeline assembly utilizing the Venturi pressure difference principle also includes: a main water supply pipeline 200 and a high-temperature water disinfection circulation device 300; the branch pipe assembly 100 is multiple, and the first interface 10a and the second interface 10b of each branch pipe assembly 100 are connected in series to the main water supply pipeline 200, so as to connect multiple branch pipe assemblies 100 in series to the main water supply pipeline 200 in sequence; the circulating water inlet of the high-temperature water disinfection circulation device 300 and the circulating water outlet of the high-temperature water disinfection circulation device 300 are connected in series to the main water supply pipeline 200 to form a circulating disinfection pipeline.

[0047] It can be understood that, in practice, the main water supply pipeline 200 may also adopt the temperature-resistant and pressure-resistant hose of the above embodiment.

[0048] During the regular disinfection of the temperature-resistant and pressure-resistant circulating pipe components utilizing the Venturi pressure differential principle, the high-temperature water disinfection circulation device 300 heats and pressurizes the water in the main water supply pipe 200 and drives the circulation, thereby sterilizing and disinfecting the main water supply pipe 200 and the branch pipe assembly 100 using high-temperature and high-pressure water. During the entire process, there is no need to disassemble the main water supply pipe 200 and the branch pipe assembly 100.

[0049] The main water supply pipeline 200 supplies water through a water supply device 500 connected in series therewith.

[0050] It is understandable that in order to achieve high-temperature and high-pressure circulating water to sterilize and disinfect the main water supply pipeline 200 and the branch pipe assembly 100, multiple valves can be used to achieve this. For example, valves are respectively provided between the circulating water inlet of the high-temperature water disinfection circulation device 300, the circulating water outlet of the high-temperature water disinfection circulation device 300, the metal plug connector 50 and the water inlet of the dialyzer 400, and the main water supply pipeline 200 and the water supply device 500. During the disinfection process, the valves between the metal plug connector 50 and the water inlet of the dialyzer 400 and between the main water supply pipeline 200 and the water supply device 500 can be closed.

[0051] Specifically, the high-temperature water disinfection circulation device 300 includes: a water temperature heater, a water pressure booster, a circulating water pump and a controller; the main water supply pipeline 200, the water temperature heater, the water pressure booster and the circulating water pump are connected in series, and the controller is electrically connected to the water temperature heater, the water pressure booster and the circulating water pump respectively. The water temperature heater is used to heat the water in the main pipeline, and the water pressure booster is used to pressurize the water in the main pipeline, so that the water temperature can reach above 120°C under high pressure, and the high-temperature and high-pressure water above 120°C is circulated in the main water supply pipeline 200 and the branch pipe assembly 100 for more than 30 minutes to achieve fast and convenient disinfection and sterilization maintenance operations.

[0052] In the above-mentioned temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle, the high-temperature water disinfection circulation device 300 also includes: a drain valve, which is arranged on the main water supply pipeline 200. After the maintenance operation of disinfection and sterilization is completed, the drain valve can be opened to facilitate the discharge of the water used for disinfection and sterilization. In addition, clean water can be used for flushing.

[0053] In a specific implementation, the ratio of the radial cross-sectional area of ​​the water flow channel of the main water supply pipeline 200 to the radial cross-sectional area of ​​the water flow channel of the temperature-resistant and pressure-resistant hose is between 2 and 3. For example, the ratio is any one of 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, and 3. In a multi-bed system (more than 50 beds, each bed is provided with a branch pipe assembly 100 connected to the main pipe), the pressure loss of the branch pipe assembly 100 can be effectively reduced, and the flow rate of the terminal branch pipe assembly 100 is guaranteed to be greater than 2m / s, thereby effectively preventing the growth of bacteria in the terminal branch pipe assembly 100.

[0054] In the related art, two interfaces are usually sealed and connected using silicone sealing rings. In the embodiment of the present scheme, the sealing connection structure between the first branch hose 30 and the third interface 10c of the metal connecting pipe 10, and the sealing connection structure between the second branch hose 40 and the fourth interface 10d of the metal connecting pipe 10 are both spherical seals. The connection method between the first branch hose 30 and the metal connecting pipe 10, and the connection method between the second branch hose 40 and the metal connecting pipe 10 are both hard seals, eliminating the silicone pad link, and the sealing effect is better, which can further reduce the risk of contamination. In addition, the structure can be made of metal material, the device has a simple structure, is easy to use, and can achieve high-temperature water disinfection above 121 degrees.

[0055] Figure 4 This is a structural schematic diagram of a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to another embodiment of the utility model. Figure 5 This is a schematic diagram of the disassembled structure of a conical joint 91, a spherical joint 92 and a connecting nut 93 in a temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to another embodiment of the utility model. Figure 4 and Figure 5 As shown, specifically, the third interface 10c of the metal connecting pipe fitting 10 includes: a conical joint 91, a spherical joint 92 and a connecting nut 93; the first end of the conical joint 91 has a conical interface 911, which is located outside the cavity 11, and the second end of the conical joint 91 extends into the cavity 11; the first end of the spherical joint 92 has a spherical interface 921, and the spherical interface 921 is connected to the conical interface 911; the connecting nut 93 locks the spherical interface 921 to the conical joint 91.

[0056] In the spherical seal, the bell-mouth cone surface of the cone interface 911 of the cone joint 91 and the spherical interface 921 of the spherical joint 92 are line seals. After the connecting nut 93 is tightened, the bell-mouth cone surface of the cone interface 911 of the cone joint 91 and the spherical interface 921 of the spherical joint 92 can produce a slight deformation, thereby forming an annular sealing surface between the bell-mouth cone surface and the spherical interface 921.

[0057] In an implementation scheme for realizing that the connecting nut 93 locks the spherical interface 921 to the conical joint 91, the outer periphery of the spherical joint 92 has a circle of retaining ring 922, and the inner wall of the connecting nut 93 has a stepped groove 931. The retaining ring 922 can be clamped on the stepped surface of the stepped groove 931, so that the spherical interface 921 is locked to the conical joint 91 when the connecting nut 93 is locked to the outer wall of the conical joint 91.

[0058] The conical joint 91 can be welded to the metal connecting pipe 10 as a whole, thereby improving the integrity and reducing the risk of leakage and pollution.

[0059] The throttling structure 12 and the cavity 11 may be an integrated structure made of metal material.

[0060] In addition, in a multi-bed system (more than 50 beds, each bed is provided with a branch pipe assembly 100 connected to the main pipe), when the dialyzers 400 of the beds close to the water supply device 500 are turned on, the liquid pressure of the terminal branch pipe assembly 100 will be low and the flow rate will be slow. Therefore, the liquid pressure difference between the first position and the second position of the cavity 11 of the terminal branch pipe assembly 100 is low, the Venturi effect of the liquid flow of the first branch hose 30 and the second branch hose 40 will be weakened, and the liquid flow rate in the first branch hose 30 and the second branch hose 40 will be slow. In the case where the dialyzer 400 corresponding to the terminal branch pipe assembly 100 has not been turned on for a long time, bacteria are prone to grow.

[0061] In an embodiment of the present scheme, the throttling structure 12 is an elastic ring lining 80, which is arranged on the inner wall of the second position in the cavity 11, and the elastic ring lining 80 has a channel connecting the cavity 11 and the fourth interface 10d; when there is a fluid with a first pressure in the cavity 11, the elastic ring lining 80 undergoes a first elastic deformation, and the elastic ring lining 80 has a first radial cross-sectional area of ​​the water flow channel; when there is a fluid with a second pressure in the cavity 11, the elastic ring lining 80 undergoes a second elastic deformation, and the elastic ring lining 80 has a second radial cross-sectional area of ​​the water flow channel; the second pressure is less than the first pressure, and the radial cross-sectional area of ​​the second water flow channel is less than the radial cross-sectional area of ​​the first water flow channel. When the liquid pressure in the cavity 11 of the terminal branch pipe assembly 100 decreases and the flow rate weakens, the elastic ring lining 80 in the cavity 11 of the terminal branch pipe assembly 100 will shrink, and the radial cross-sectional area of ​​the water flow channel will decrease, so that the liquid flow rate difference between the first position and the second position of the cavity 11 of the terminal branch pipe assembly 100 increases, thereby increasing the liquid pressure difference between the first position and the second position of the cavity 11 of the terminal branch pipe assembly 100, and the Venturi effect of the liquid flow in the first branch hose 30 and the second branch hose 40 will be enhanced, and the liquid flow rate in the first branch hose 30 and the second branch hose 40 will be faster.

[0062] Specifically, the present application provides a temperature-resistant and pressure-resistant circulation pipeline assembly utilizing the Venturi pressure difference principle, wherein the metal connecting pipe 10 can be made of stainless steel material, the metal three-way connector 20 can be a U-shaped connector, and the metal plug connector 50 can be a quick-connect connector for quick connection with the dialyzer 400.

[0063] The working principle of Venturi is:

[0064] When the water flows from the end of the cavity 11 through the throttling structure 12, the flow rate suddenly increases, the pressure upstream of the throttling structure 12 (the first position of the cavity 11) is relatively high, and the pressure downstream of the throttling structure 12 (the second position of the cavity 11) is relatively low. Part of the water flows into the first branch hose 30, passes through the second branch hose 40, and then merges into the cavity 11 at the lower end entrance of the throttler, forming a continuously flowing water flow. A quick-connect connector is inserted at the top of the U-shaped connector, and the dialysis machine can automatically absorb the dialysis water in the pipeline as needed.

[0065] After a period of operation, the entire pipeline can be sterilized with high temperature to ensure safe water use.

[0066] The operation mode of high temperature thermal disinfection is:

[0067] Every few days, heat the water in the pipes to 121 degrees and circulate for more than 30 minutes to perform thermal disinfection on the pipes.

[0068] After thermal disinfection, open the drain valve to drain the water in the pipe, and then flush it. After flushing, close the drain valve.

[0069] The technical solution provided by this embodiment has at least one of the following advantages:

[0070] 1. The embodiment of the utility model can avoid dead flow of water flow through the branch pipe assembly;

[0071] 2. The embodiments of the utility model significantly reduce the growth of bacteria in the pipeline;

[0072] 3. The embodiments of the present utility model can be applied to high temperature sterilization process;

[0073] 4. The embodiments of the utility model can be quickly installed and replaced;

[0074] 5. The embodiments of the utility model are flexible and easy to operate;

[0075] 6. The embodiments of the utility model have strong reliability and occupy little space.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle, characterized in that: include: A branch pipe assembly, the branch pipe assembly comprising: A metal connecting pipe fitting, wherein one end of the metal connecting pipe fitting has a first interface, the other end of the metal connecting pipe fitting has a second interface, the metal connecting pipe fitting has a cavity connecting the first interface and the second interface, and in the direction from the first interface of the metal connecting pipe fitting to the second interface of the metal connecting pipe fitting, the metal connecting pipe fitting is sequentially provided with a third interface and a fourth interface, the third interface is connected to a first position of the cavity, and the fourth interface is connected to a second position of the cavity; The second position in the cavity has a throttling structure to limit the radial cross-sectional area of ​​the water flow channel at the second position in the cavity, so that the liquid flow rate and liquid pressure of the liquid flowing through the cavity at the first position of the cavity are different from the liquid flow rate and liquid pressure at the second position of the cavity; A metal three-way connector, the metal three-way connector comprising a first connection port, a second connection port and a third connection port, wherein the first connection port, the second connection port and the third connection port are connected; A first branch hose, connected to the third interface of the metal connecting pipe and the first connection port of the metal three-way connector; A second branch hose is connected to the fourth interface of the metal connecting pipe and the second connection port of the metal three-way connector; A metal plug connector is connected to the third connection port of the metal three-way connector; wherein, The first branch hose and the second branch hose are both temperature-resistant and pressure-resistant hoses, and the tube wall of the temperature-resistant and pressure-resistant hose includes at least one circle of metal braided mesh.

2. The temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to claim 1, characterized in that: The water pressure resistance of the heat-resistant and pressure-resistant hose is greater than or equal to 1 MPa, and the high temperature resistance of the heat-resistant and pressure-resistant hose is greater than or equal to 150°C.

3. The temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to claim 1, characterized in that: The temperature-resistant and pressure-resistant hose comprises: an inner layer tube of silicone, a middle layer tube made of a metal woven mesh, and an outer layer protective tube, wherein the middle layer tube is arranged between the inner layer tube and the outer layer protective tube; or The temperature-resistant and pressure-resistant hose comprises: a metal pipe net formed by a metal braided net and a high-temperature-resistant silicone tube filled in the metal pipe net.

4. The temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to claim 1, characterized in that: Also includes: Main water supply pipeline and high-temperature water disinfection circulation device; There are multiple branch pipe assemblies, and the first interface and the second interface of each branch pipe assembly are connected in series to the main water supply pipeline, so that multiple branch pipe assemblies are connected in series to the main water supply pipeline in sequence; The circulating water inlet and the circulating water outlet of the high-temperature water disinfection circulation device are connected in series to the main water supply pipeline to form a circulating disinfection pipeline.

5. The temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to claim 4, characterized in that: The high-temperature water disinfection circulation device comprises: a water temperature heater, a water pressure booster, a circulating water pump and a controller; The main water supply pipeline, the water temperature heater, the water pressure booster and the circulating water pump are connected in series, and the controller is electrically connected to the water temperature heater, the water pressure booster and the circulating water pump respectively.

6. The temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to claim 5, characterized in that: The high-temperature water disinfection circulation device also includes: a drain valve, which is arranged on the main water supply pipeline.

7. The temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to claim 4, characterized in that: The ratio of the radial cross-sectional area of ​​the water flow channel of the main water supply pipeline to the radial cross-sectional area of ​​the water flow channel of the temperature-resistant and pressure-resistant hose is between 2 and 3.

8. The temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to claim 1, characterized in that: The throttling structure is an elastic ring liner, which is arranged on the inner wall of the second position in the cavity, and the elastic ring liner has a channel connecting the cavity and the fourth interface; When there is fluid with a first pressure in the cavity, the elastic ring lining undergoes a first elastic deformation, and the elastic ring lining has a first radial cross-sectional area of ​​the water flow channel. When there is fluid with a second pressure in the cavity, the elastic ring lining undergoes a second elastic deformation, and the elastic ring lining has a second radial cross-sectional area of ​​the water flow channel. The second pressure is less than the first pressure, and the radial cross-sectional area of ​​the second water flow channel is less than the radial cross-sectional area of ​​the first water flow channel.

9. The temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to claim 1, characterized in that: The sealing connection structure between the first branch hose and the third interface of the metal connecting pipe and the sealing connection structure between the second branch hose and the fourth interface of the metal connecting pipe are both spherical seals.

10. The temperature-resistant and pressure-resistant circulation pipeline assembly using the Venturi pressure difference principle according to claim 9, characterized in that: The third interface of the metal connecting pipe includes: a conical joint, a spherical joint and a connecting nut; The first end of the conical joint has a conical interface and is located outside the cavity, and the second end of the conical joint extends into the cavity; The first end of the spherical joint has a spherical interface, and the spherical interface is butted with the conical interface; The connecting nut locks the spherical interface to the conical joint.

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