CN113952529A - Fork of precision flowmeter divides tub device for hemodialysis treatment - Google Patents

Fork of precision flowmeter divides tub device for hemodialysis treatment Download PDF

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Publication number
CN113952529A
CN113952529A CN202111237250.3A CN202111237250A CN113952529A CN 113952529 A CN113952529 A CN 113952529A CN 202111237250 A CN202111237250 A CN 202111237250A CN 113952529 A CN113952529 A CN 113952529A
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China
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main
shaped pipe
magnet
mounting bracket
coil
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CN202111237250.3A
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Chinese (zh)
Inventor
欧小明
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Chengdu Kehui Mould Co ltd
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Chengdu Kehui Mould Co ltd
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Priority to CN202111237250.3A priority Critical patent/CN113952529A/en
Publication of CN113952529A publication Critical patent/CN113952529A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
    • A61M1/1621—Constructional aspects thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • A61M2205/3334—Measuring or controlling the flow rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3379—Masses, volumes, levels of fluids in reservoirs, flow rates

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Urology & Nephrology (AREA)
  • Hematology (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Emergency Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measuring Volume Flow (AREA)
  • External Artificial Organs (AREA)

Abstract

The invention provides a forking tube device of a precision flowmeter for hemodialysis treatment, which comprises a shell for accommodating a forking tube, a main mounting bracket, a main oscillator, a first flowing liquid quality detector and a second flowing liquid quality detector, wherein the main mounting bracket is used for fixing the forking tube and is positioned in the shell; the method is characterized in that: the fork branch pipe is composed of two mutually crossed U-shaped pipes, and the main oscillator is positioned at the cross position of the two U-shaped pipes; the first flowing liquid mass detector and the second flowing liquid mass detector are respectively positioned at a first corner and a second corner of the U-shaped pipe; the two ends of the U-shaped pipe are fixed on the main mounting support, and the main mounting support is fixed on the shell through fastening screws. The tube branching device of the precision flowmeter for hemodialysis treatment can ensure that the precision flowmeter for hemodialysis treatment has stable work, reduced manufacturing difficulty and convenient installation and maintenance.

Description

Fork of precision flowmeter divides tub device for hemodialysis treatment
Technical Field
The invention relates to the technical field of medical instrument manufacturing, in particular to a tube branching device of a precise flow meter for hemodialysis treatment.
Background
Hemodialysis treatment is to introduce the blood and dialysate of a patient into a dialyzer (the flow directions of the two are opposite) at the same time, utilize a semipermeable membrane of the dialyzer (artificial kidney), clear excess toxins and excess water accumulated in the blood out of the body, supplement basic groups to correct acidosis, adjust electrolyte disturbance, and replace the excretion function of the kidney.
Hemodialyzers, commonly known as artificial kidneys, have 3 types, i.e., hollow fiber type, coil type and flat plate type. The most common hollow fiber type is composed of 1-1.5 ten thousand hollow fibers, and the wall of each hollow fiber is a dialysis membrane and has the property of a semipermeable membrane. During hemodialysis, blood flows into each hollow fiber, dialysate flows through each hollow fiber, the flow direction of the blood is opposite to that of the dialysate, poisons are removed through a semipermeable membrane principle, and moisture is removed through ultrafiltration and osmosis.
During treatment, the blood is in contact with the dialysate through a semi-permeable membrane, through which it releases waste substances to the dialysate and gets or acquires ions by diffusion and convection, while excess fluid is removed by ultrafiltration. Excess fluid, typically about two liters, is required during these procedures to use a computer to monitor the total mass of fluid that is being subtracted by the patient during dialysis, also known as hemodialysis weight loss.
The measurement system for calculating weight loss comprises a plurality of active elements, the most important of which is the precision flow meter, which is commonly used in the prior art as a differential flow meter.
Differential flow meters operate on the principle that when a mass point in a rotating system moves toward or away from the center of rotation, an inertial force is generated, and the mass flow of a fluid through a conduit is measured by directly or indirectly measuring the coriolis force acting on the conduit by the fluid flowing in the rotating conduit, and are also known as coriolis mass flow meters.
The Coriolis mass flowmeter can directly measure mass flow and has high measurement accuracy. The measurable fluid is wide in range, and comprises various liquids of high-viscosity liquid, slurry containing solids, liquid containing trace gas and medium-high pressure gas with enough density. The measuring tube can be generally regarded as a non-moving part due to the small vibration amplitude, and no obstruction piece or moving piece exists in the measuring pipeline. Therefore, the coriolis mass flowmeter is sensitive to external vibration interference, and very high requirements are put on the installation of elements such as a flow sensor of the coriolis mass flowmeter in order to prevent external environmental factors from influencing the vibration of the pipeline.
The fork branch pipe of the differential flowmeter is fixedly installed with the related sensor, so that the working precision, the working stability, the manufacturing cost and the like of the whole device are greatly improved.
Disclosure of Invention
The invention aims to provide a tube branching device of a precision flowmeter for hemodialysis treatment, which can ensure that the precision flowmeter for hemodialysis treatment has stable work, reduced manufacturing difficulty and convenient installation and maintenance.
In order to achieve the purpose, the invention provides the following technical scheme: a fork tube dividing device of a precision flowmeter for hemodialysis treatment comprises a shell for accommodating a fork tube, a main mounting bracket, a main oscillator, a first flowing liquid quality detector and a second flowing liquid quality detector, wherein the main mounting bracket is used for fixing the fork tube and is positioned in the shell; the fork branch pipe is composed of two mutually crossed U-shaped pipes, and the main oscillator is positioned at the cross position of the two U-shaped pipes; the first flowing liquid mass detector and the second flowing liquid mass detector are respectively positioned at a first corner and a second corner of the U-shaped pipe; the two ends of the U-shaped pipe are fixed on the main mounting support, and the main mounting support is fixed on the shell through fastening screws.
Preferably, the intersection of the two mutually intersected U-shaped tubes is positioned in the middle of the U-shaped tube.
Preferably, the first fluid mass detector comprises a left mounting bracket, a left circuit board, a left coil, a left magnet and a left magnet bracket; the left mounting bracket is fixed on the shell through a bolt, the left circuit board and the left coil are mounted on the left mounting bracket, and the left magnet is directly welded at a first corner of the U-shaped pipe through the left magnet bracket.
Preferably, the second flowing liquid mass detector comprises a right mounting bracket, a right circuit board, a right coil, a right magnet and a right magnet bracket; the right mounting bracket is fixed on the shell through a bolt, the right circuit board and the right coil are mounted on the right mounting bracket, and the right magnet is directly welded at a second corner of the U-shaped pipe through the right magnet bracket.
According to the technical scheme, the main mounting bracket is of a groove-shaped steel structure, through holes are formed in the side wall of the main mounting bracket of the groove-shaped steel structure, and two ends of the U-shaped pipe penetrate through the through holes respectively and are fixed to the main mounting bracket.
According to the preferable technical scheme, the main oscillator comprises a main circuit board, a vibration magnetic rod, a main detection coil and a main vibration coil; the vibration magnetic bar is directly welded on the U-shaped pipe; the vibration magnetic rod is characterized in that the main vibration coil, the main detection coil and the main circuit board are all sleeved on the vibration magnetic rod, the main vibration coil and the main detection coil are respectively located on two sides of the main circuit board, the main vibration coil is located on one side close to the U-shaped pipe, and the main detection coil is located on one side far away from the U-shaped pipe.
Preferably, the shell is provided with a through hole, two ends of the U-shaped pipe are provided with pipe nozzles, and the pipe nozzles penetrate through the through hole and are exposed outside the shell.
According to the preferable technical scheme, the left magnet bracket is provided with a clamping groove and a platform; the left magnet support is clamped at the first corner of the U-shaped pipe through the clamping groove and then fixed at the first corner of the U-shaped pipe in a welding mode; the left magnet is adsorbed on the platform of the left magnet support.
According to the preferable technical scheme, the right magnet support is provided with a clamping groove and a platform; the right magnet bracket is clamped at the second corner of the U-shaped pipe through the clamping groove and then fixed at the second corner of the U-shaped pipe in a welding mode; the right magnet is adsorbed on the platform of the right magnet support.
Compared with the prior art, the invention has the beneficial effects that:
1. through left magnet support, right magnet support, directly with left magnet or right magnet joint back, the welding is on U type pipe for whole check out test set's magnet is relative expansion end, and the coil is fixed on the casing, and the coil is the stiff end. The U-shaped pipe is driven to be weakly deformed through oscillation sent by the main oscillator, and then the deformation is transmitted to the magnet located at the R-angle position of the U-shaped pipe of the branch pipe of the fork, the magnet is driven to do the action of cutting magnetic induction lines relative to the coil, and therefore the induction of fluid quality change in the pipe is achieved. By adopting the structure, the influence of signal acquisition from the branch tube of the fork in the prior art is not considered, the stability of the detection instrument is improved, the manufacturing and production difficulty is reduced, and the manufacturing and production cost is further reduced.
2. The main mounting bracket adopts a structure similar to the groove steel, the U-shaped pipe of the fork branch pipe is fixed, the whole design is compact, and the mounting and fixing effects are good.
3. The main oscillator of whole precision flowmeter installs at the positive middle part of fork branch pipe, and first flowing liquid quality detector and second flowing liquid quality detector install in both sides about the main oscillator symmetry respectively for the quality of whole U type fork branch pipe is balanced, and work is more steady, detects more accurately.
Drawings
Fig. 1 is a schematic view of the entire structure of the tube branching device of the precision flowmeter for hemodialysis treatment according to the present invention.
Fig. 2 is a schematic diagram of the internal three-dimensional structure of the tube branching device of the precision flowmeter for hemodialysis treatment according to the present invention.
Fig. 3 is a schematic front view of fig. 2.
Fig. 4 is a schematic plan view of the installation among the main oscillator, the first flowing liquid mass detector, the second flowing liquid mass detector, and the U-tube.
FIG. 5 is a side view of a partial installation between the master oscillator and the U-tube.
FIG. 6 is a schematic view of the three-dimensional installation among the left magnet, the left magnet support, the right magnet support, the U-shaped tube and the main installation.
FIG. 7 is a partially enlarged installation diagram of the right magnet, the right magnet support and the U-shaped tube.
Detailed Description
An embodiment of a tube branching device of a precision flow meter for hemodialysis treatment according to the present invention will be further described with reference to fig. 1 to 7.
As shown in fig. 1 to 7: a fork tube dividing device of a precision flowmeter for hemodialysis treatment comprises a shell 1 for accommodating a fork tube, a main mounting bracket 2 for fixing the fork tube and positioned in the shell 1, a main oscillator 3, a first flowing liquid quality detector 4 and a second flowing liquid quality detector 5; the bifurcated pipe is composed of two mutually crossed U-shaped pipes 6, and the two mutually crossed U-shaped pipes 6 are crossed at the middle part of the U-shaped pipes 6. The master oscillator 3 is located at the intersection of the two U-tubes 6. The first flowing liquid mass detector 4 and the second flowing liquid mass detector 5 are respectively positioned at a first corner and a second corner of the U-shaped pipe 6; two ends of the U-shaped pipe 6 are fixed on the main mounting bracket 2, and the main mounting bracket 2 is fixed on the shell 1 through a fastening screw 7. The first flowing liquid mass detector 4 comprises a left mounting bracket 41, a left circuit board 42, a left coil 43, a left magnet 44 and a left magnet bracket 45; the left mounting bracket 41 is fixed on the shell 1 through bolts, the left circuit board 42 and the left coil 43 are mounted on the left mounting bracket 41, and the left magnet 44 is directly welded at the first corner of the U-shaped tube 6 through the left magnet bracket 45. The second flowing liquid mass detector 5 comprises a right mounting bracket 51, a right circuit board 52, a right coil 53, a right magnet 54 and a right magnet bracket 55; the right mounting bracket 5 is fixed on the housing 1 through a bolt, the right circuit board 52 and the right coil 53 are mounted on the right mounting bracket 51, and the right magnet 54 is directly welded at a second corner of the U-shaped pipe 6 through the right magnet bracket 55.
The main mounting bracket 2 is of a groove-shaped steel structure, through holes are formed in the side wall of the main mounting bracket 2 of the groove-shaped steel structure, and two ends of the U-shaped pipe 6 penetrate through the through holes respectively and are fixed on the main mounting bracket 2.
The main oscillator 3 comprises a main circuit board 31, a vibrating magnetic rod 32, a main detection coil 33 and a main vibrating coil 34; the vibration magnetic bar 32 is directly welded on the U-shaped pipe 6; the main vibration coil 34, the main detection coil 33 and the main circuit board 31 are all sleeved on the vibration magnetic rod 32, the main vibration coil 34 and the main detection coil 33 are respectively located on two sides of the main circuit board 31, the main vibration coil 34 is located on one side close to the U-shaped pipe 6, and the main detection coil 33 is located on one side far away from the U-shaped pipe 6.
The shell 1 is provided with a through hole, two ends of the U-shaped pipe 6 are provided with pipe nozzles 61, and the pipe nozzles 61 penetrate through the through hole and are exposed outside the shell 1.
The left magnet bracket 45 is provided with a clamping groove 8 and a platform 9; the left magnet bracket 45 is clamped at the first corner of the U-shaped pipe 6 through the clamping groove 8 and then fixed at the first corner of the U-shaped pipe 6 in a welding manner; the left magnet 44 is attached to the platform 9 of the left magnet holder 45.
The right magnet bracket 55 is provided with a clamping groove 8 and a platform 9; the right magnet bracket 55 is clamped at the second corner of the U-shaped pipe 6 through the clamping groove 8 and then fixed at the second corner of the U-shaped pipe 6 in a welding manner; the right magnet 54 is attached to the platform 9 of the right magnet holder 55.
The working principle of the invention is as follows: the fork flow meter is characterized in that a main oscillator generates vertical oscillation with a certain frequency when liquid flows in a pipeline through U-shaped A-C pipes and U-shaped B-D pipes, Coriolis force is generated at the R corners of the two U-shaped pipes when the liquid flows in the pipeline, magnetic lines of cut magnetic force are generated through magnets fixed on the U-shaped pipes, a left coil and a right coil, generated electric signals are obtained through amplification calculation, the mass of the liquid flowing in the pipes is obtained, the higher the flowing speed is, the higher the Coriolis force is, and the larger the amplitude of the U-shaped pipes is.
It is customary in the art to fix the coil at the R corner of the U-tube by winding, and then fix the magnet on the housing by means of the fixing bracket. The coil is as the form of expansion end, magnet as the stiff end, often can cause the coil to become flexible, defect such as drop, want to fix the coil, just must additionally increase a lot of supports, however the manufacturing accuracy requirement of U type fork branch pipe is very high, and especially this kind of structure extremely high to the quality requirement of the R fillet department of U type fork branch pipe, this very big increase production manufacturing cost, also increased later stage use maintenance cost simultaneously, cause the work of flowmeter unstable, phenomenon such as unstability easily. Meanwhile, as the coil is wound on the U-shaped pipe and the coil is not at the movable end, the coil is easy to displace in the place where the coil is wound after long-time use, so that the defects of unbalanced mass, inaccurate mass detection and the like of the U-shaped pipe are caused.
The present invention should be considered as limited only by the preferred embodiments of the invention, and not limited to the above embodiments, and it should be understood that any modifications, equivalents and improvements made within the spirit and principle of the invention are included in the scope of the invention.

Claims (9)

1. A fork tube dividing device of a precision flowmeter for hemodialysis treatment comprises a shell for accommodating a fork tube, a main mounting bracket, a main oscillator, a first flowing liquid quality detector and a second flowing liquid quality detector, wherein the main mounting bracket is used for fixing the fork tube and is positioned in the shell; the method is characterized in that: the fork branch pipe is composed of two mutually crossed U-shaped pipes, and the main oscillator is positioned at the cross position of the two U-shaped pipes; the first flowing liquid mass detector and the second flowing liquid mass detector are respectively positioned at a first corner and a second corner of the U-shaped pipe; the two ends of the U-shaped pipe are fixed on the main mounting support, and the main mounting support is fixed on the shell through fastening screws.
2. The tube branching device of a precision flow meter for hemodialysis treatment according to claim 1, wherein: the intersection of the two mutually intersected U-shaped pipes is positioned in the middle of the U-shaped pipe.
3. The tube branching device of a precision flow meter for hemodialysis treatment according to claim 2, wherein: the first flowing liquid mass detector comprises a left mounting bracket, a left circuit board, a left coil, a left magnet and a left magnet bracket; the left mounting bracket is fixed on the shell through a bolt, the left circuit board and the left coil are mounted on the left mounting bracket, and the left magnet is directly welded at a first corner of the U-shaped pipe through the left magnet bracket.
4. The tube branching device of a precision flow meter for hemodialysis treatment according to claim 3, wherein: the second flowing liquid mass detector comprises a right mounting bracket, a right circuit board, a right coil, a right magnet and a right magnet bracket; the right mounting bracket is fixed on the shell through a bolt, the right circuit board and the right coil are mounted on the right mounting bracket, and the right magnet is directly welded at a second corner of the U-shaped pipe through the right magnet bracket.
5. The tube branching device of a precision flow meter for hemodialysis treatment according to claim 4, wherein: the main mounting bracket is of a groove-shaped steel structure, through holes are formed in the side wall of the main mounting bracket of the groove-shaped steel structure, and two ends of the U-shaped pipe penetrate through the through holes respectively and are fixed on the main mounting bracket.
6. The tube branching device of a precision flow meter for hemodialysis treatment according to claim 5, wherein: the main oscillator comprises a main circuit board, a vibrating magnetic rod, a main detection coil and a main vibrating coil; the vibration magnetic bar is directly welded on the U-shaped pipe; the vibration magnetic rod is characterized in that the main vibration coil, the main detection coil and the main circuit board are all sleeved on the vibration magnetic rod, the main vibration coil and the main detection coil are respectively located on two sides of the main circuit board, the main vibration coil is located on one side close to the U-shaped pipe, and the main detection coil is located on one side far away from the U-shaped pipe.
7. The tube branching device of a precision flow meter for hemodialysis treatment according to claim 6, wherein: the shell is provided with a through hole, pipe nozzles are arranged at two ends of the U-shaped pipe and penetrate through the through hole to be exposed outside the shell.
8. The tube branching device of a precision flow meter for hemodialysis treatment according to claim 3, wherein: the left magnet bracket is provided with a clamping groove and a platform; the left magnet support is clamped at the first corner of the U-shaped pipe through the clamping groove and then fixed at the first corner of the U-shaped pipe in a welding mode; the left magnet is adsorbed on the platform of the left magnet support.
9. The tube branching device of a precision flow meter for hemodialysis treatment according to claim 4, wherein: the right magnet bracket is provided with a clamping groove and a platform; the right magnet bracket is clamped at the second corner of the U-shaped pipe through the clamping groove and then fixed at the second corner of the U-shaped pipe in a welding mode; the right magnet is adsorbed on the platform of the right magnet support.
CN202111237250.3A 2021-10-21 2021-10-21 Fork of precision flowmeter divides tub device for hemodialysis treatment Pending CN113952529A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111237250.3A CN113952529A (en) 2021-10-21 2021-10-21 Fork of precision flowmeter divides tub device for hemodialysis treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111237250.3A CN113952529A (en) 2021-10-21 2021-10-21 Fork of precision flowmeter divides tub device for hemodialysis treatment

Publications (1)

Publication Number Publication Date
CN113952529A true CN113952529A (en) 2022-01-21

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CN202111237250.3A Pending CN113952529A (en) 2021-10-21 2021-10-21 Fork of precision flowmeter divides tub device for hemodialysis treatment

Country Status (1)

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