CN108603780B

CN108603780B - Liquid flow measuring device

Info

Publication number: CN108603780B
Application number: CN201680077994.4A
Authority: CN
Inventors: 徐孟飚
Original assignee: JINZHOU TECHNOLOGY Co Ltd
Current assignee: JINZHOU TECHNOLOGY Co Ltd
Priority date: 2016-02-04
Filing date: 2016-02-04
Publication date: 2020-02-07
Anticipated expiration: 2036-02-04
Also published as: CN108603780A; WO2017132942A1

Abstract

A liquid flow measuring device is provided, the top of the device is provided with a dropping liquid pipe (18) shaped like a dropping funnel, a pressure guide channel (112) communicated with the inside is arranged around a dropping liquid pipe body (10), the outer end of the pressure guide channel (112) is provided with a pressure sensing module (30), a pressure communicating pipe (20) is arranged right below the dropping liquid pipe (18), and the bottom end of the pressure communicating pipe (20) extends to a position close to the inner end of the pressure guide channel (112); when the device is used for a micro flow measurement pipeline, the device can be connected into a small flow pipeline in series; when the drip tube is used for a transfusion system, the drip tube is connected in series in a transfusion pipeline of liquid medicine, the liquid medicine can enter the drip tube body (10) in the transfusion process, the pressure sensing module (30) senses the dropping number of the liquid medicine, and then the information is transmitted to a background of a hospital or a single chip (101) carried by the hospital for calculation, so that the flow speed and flow of the transfusion can be calculated, and whether the transfusion is stopped or reversed can be calculated, the effect of automatically monitoring the transfusion process can be achieved, and accidents can be avoided.

Description

Liquid flow measuring device

Technical Field

The invention relates to a device for metering and controlling feeding in biochemical reaction, chemical reaction, brewing and ore washing and medical transfusion, in particular to a device which is shaped like a dropping funnel, changes continuous flow into dropping liquid, detects the quantity of the dropping liquid and is matched with an internal or external device to calculate flow speed and flow.

Background

For small flow measurements, it has been a very difficult problem, especially for flow measurements with flow rates of only 1, 2 liters or less per hour or a few tenths of liters (e.g., 0.1-1.0L/h). The traditional flow measurement modes such as a turbine and a vortex shedding flowmeter have large initial flow and cannot realize the measurement of small flow; or with float flow meters, which may be suitable, it is also difficult to achieve such a small flow rate range, so that the flow meter has to be more precisely machined.

For convenience of explanation, the prior art is described only in terms of the conventional medical infusion method, and other prior arts for small flow measurement such as dosing measurement control are similar to the conventional medical infusion method, and therefore, the description thereof is omitted. Referring to fig. 10, an infusion bag 80 filled with a liquid medicine is hung on a support, an infusion tube 81 connected to the bottom of the infusion bag 80 is combined with a disposable needle 82 capable of injecting a human body, and a dropping funnel 83 is connected in series with the middle of the infusion tube 81, wherein the dropping funnel 83 is used for a medical staff to observe the dropping speed and prevent accidents. When in use, the disposable needle 82 is inserted into the vein of the arm, the back of the hand or the inner side of the thigh of the human body, and the effect of continuously injecting the liquid medicine into the human body is achieved.

In the process of injecting the liquid medicine, the infusion speed is controlled by providing an adjusting infusion valve 84 around the infusion tube 81 and controlling the speed and flow rate of the infusion by changing the size of the flow area of the infusion tube 81 by the adjusting infusion valve 84. However, the regulating infusion valve 84 for controlling the infusion speed, especially the electric or pneumatic regulating infusion valve 84, needs to be driven by energy when in use, has relatively high power consumption and relatively heavy weight, and is not convenient to use.

Although the flow rate of the infusion tube 81 can be adjusted by adjusting the rate at which the liquid medicine is injected into the human body, the medical staff can only manually observe and record the flow rate of the liquid medicine and the liquid medicine in the infusion bag 80 when they want to know whether the flow rate is proper or the liquid medicine in the infusion bag is used up, and can only know the result of the recording after calculating the result, and this manual observation and recording method cannot automatically give an alarm to notify the medical staff when the infusion rate is abnormal, and cannot timely replace the infusion bag 80 with a new one when the liquid medicine in the infusion bag 80 is used up. In addition, since the manual operation factor has a high degree of uncertainty, such a manual observation and recording method is also likely to cause accidents such as medical careless and blood backflow, for example, due to untimely replacement of the infusion bag 80.

In order to solve the above uncertainty of manual operation, some authors have tried to provide a solution, which measures the infusion speed and volume to a certain extent by weighing the infusion bag or installing a counting means for photoelectrically detecting the number of drops beside the dropping funnel.

However, the aforementioned weighing method has a disadvantage in that the tubing of the infusion tube is easily pulled, which affects the accuracy of the measurement. The photoelectric detection means is installed beside the dropping funnel, such as TW patent application No. 85213537, the invention is named as the patent case of the dropping monitor, the photoelectric detector is installed beside the dropping funnel, the defect is that the sizes and the sizes of the dropping funnels produced by various manufacturers are different, the technology can only be applied to products produced by the photoelectric detector, the sizes of the dropping funnels are calibrated aiming at the products of different manufacturers to calculate the flow rate instead of producing the products of different specifications aiming at the dropping funnels of various manufacturers, and the workload is very large and the hospital is inconvenient to carry out the matching task due to the fact that the manufacturers for producing the dropping funnels are numerous; in addition, the technology of detecting the number of drops by photo-electricity also has a problem of being easily interfered by various light sources.

Disclosure of Invention

Due to the difficulty of small flow measurement, the invention aims to design a device which is shaped like a dropping funnel, changes continuous flow into point dropping flow and carries out drop-by-drop counting, and realizes the measurement of small flow. The device can be connected to any small-flow pipeline, and can also be connected to the existing infusion set pipeline to count liquid drops, so that the flow speed and flow of infusion can be calculated, whether the infusion is stopped or the infusion is in a reverse flow state can be judged, and the effect of automatically detecting the flowing condition of liquid medicine can be achieved.

To achieve the above object, the present invention provides a liquid flow rate measuring device comprising:

a dropping tube body, which is provided with a liquid storage tube, a mounting seat is formed around the liquid storage tube, a pressure guiding channel is arranged in the mounting seat in a penetrating way, the inner end of the pressure guiding channel is communicated with the inside of the liquid storage tube, a dropping tube is arranged at the top of the liquid storage tube in a penetrating way, the width of the dropping tube is narrower than that of the liquid storage tube, and a funnel-shaped dropping nozzle is formed at the bottom of the dropping tube;

a pressure communicating pipe fixed in the middle of the liquid storage pipe, wherein the top end of the pressure communicating pipe is positioned under the drip nozzle, a pressure communicating hole is formed in the pressure communicating pipe, and the bottom end of the pressure communicating hole is closer to the inner end of the pressure guiding channel than the top end; and

the pressure sensing module is arranged at the outer end of the pressure guide channel, seals the outer end of the pressure guide channel and can measure the pressure change of fluid in the pressure guide channel.

Furthermore, the mounting base is provided with a data transmission module which is electrically connected with the pressure sensing module so as to transmit the drip pressure data measured by the pressure sensing module.

Preferably, the data transmission module of the present invention includes a wireless transmission unit, and the wireless transmission unit wirelessly transmits the droplet pressure data measured by the pressure sensing module.

Preferably, the data transmission module is provided with a single chip, the single chip is electrically connected with the data transmission module, receives the drip pressure data transmitted by the data transmission module, senses whether the drip tube drops, measures the number of the dropped drips and calculates the flow rate and the flow velocity of the liquid medicine passing through the drip tube in unit time.

Further, the liquid storage tube of the present invention is divided into an upper liquid storage tube and a lower liquid storage tube which are connected in a straight line, the mounting seat is divided into an upper mounting seat and a lower mounting seat which are combined up and down, the upper mounting seat and the lower mounting seat are respectively formed around the bottom of the upper liquid storage tube and the top of the lower liquid storage tube, a flow rate adjusting groove is formed in the middle of the joint of the upper mounting seat and the lower mounting seat, the middle of the flow rate adjusting groove is communicated with the upper liquid storage tube and the lower liquid storage tube, a perforated plate is embedded in the middle of the flow rate adjusting groove, the perforated plate divides the flow rate adjusting groove into an upper part and a lower part, two or more than two flow rate adjusting holes are formed in the perforated plate, and when three or four flow rate adjusting holes are formed, the area ratio is 1: 2: 4 or 1: 2: 4: 8;

the installation base is provided with a flow adjusting hole, the installation base is provided with a plurality of flow adjusting holes, each flow adjusting hole is aligned with the corresponding flow adjusting hole, each flow adjusting hole is provided with an induction core groove, each induction core groove is a vertical hole, the inner end of each induction core groove is communicated with the corresponding flow adjusting hole, the outer end of each induction core groove is a closed end, a magnet is arranged at the position, corresponding to the outer end of each induction core groove, of the installation base, an electromagnetic induction tube and an induction coil surrounding the electromagnetic induction tube are arranged around each induction core groove, the intensity of an induction magnetic field generated by the induction coil can be enhanced by the electromagnetic induction tube, each induction coil is electrically connected with the data transmission module, an induction core rod capable of being attracted and positioned by each magnet is arranged in each induction core groove. When the induction core rod falls down, the corresponding flow regulating hole can be blocked, so that the flow passing through the flow regulating hole is zero; when the induction core rod is lifted, the corresponding flow regulating holes are completely communicated; thus, when three flow regulating holes are provided, the area ratio is 1: 2: the opening and closing conditions of the 3 flow regulating holes are combined, so that eight kinds of flow can be generated; if when four flow adjustment orifices are provided, a 1: 2: 4: the open-close condition combination of the 8 flow regulating holes with 4 flow regulating holes can realize sixteen kinds of flow.

Furthermore, the pressure guiding channel is arranged on the upper mounting seat in a penetrating manner in an up-and-down extending manner, the inner end of the pressure guiding channel is communicated with the flow adjusting groove, the middle of the top surface of the perforated plate is concavely provided with a slot, the position of the top surface of the perforated plate, which is positioned below the pressure guiding channel, is concavely provided with an outlet groove, a connecting hole communicated with the slot and the outlet groove is arranged in the perforated plate in a penetrating manner, the bottom end of the pressure communicating pipe is inserted into the slot for fixing, and the pressure communicating hole is communicated with the connecting hole.

Furthermore, the pressure guide channel is arranged on the upper mounting seat in a penetrating way in a vertically extending way, and the data transmission module is detachably combined on the upper mounting seat and is positioned beside the upper liquid storage pipe; each induction core groove is formed on the upper mounting seat, a circular coil groove is arranged on the top surface of the upper mounting seat in a downward concave mode corresponding to the periphery of each induction core groove, each coil groove is concentric with each induction core groove, a circular coil pipe penetrates through each coil groove, each induction coil is embedded in each coil pipe, each electromagnetic induction pipe is combined on the inner surface of each coil pipe, the top end of each coil pipe is connected to the bottom of the data transmission module, the magnet is combined at the bottom of the data transmission module, and the pressure sensing module is combined at the bottom of the pressure sensing module.

When the invention is used, the invention can be applied to the fields of biochemistry, chemical engineering or mining and the like for metering charging. The following description is given of how the present invention is used in a medical infusion system by way of example. When the disposable infusion bag is connected in series in an infusion system for metering, the upper end of the disposable infusion bag is inserted into the bottom of an infusion bag, the top end of the infusion tube is connected with the bottom end of a liquid storage tube, a regulating infusion valve for regulating the infusion flow is arranged around the infusion tube, a dropping funnel is connected between the regulating infusion valve and the disposable infusion bag in series, a disposable needle head is connected to the outer end of the infusion tube, and when the disposable needle head penetrates into a human body, liquid medicine flowing out of the infusion bag can flow through the disposable infusion bag, the dropping funnel, the infusion tube and the disposable needle head and is injected into the human body.

When the infusion system is used, the liquid medicine in the infusion bag firstly flows into the dropping liquid pipe which is shaped like a dropping funnel, then the liquid medicine in the dropping liquid pipe is dropped downwards and intermittently in the liquid storage pipe in a dropping mode from the dropping nozzle, so that the liquid medicine in the liquid storage pipe gradually submerges the top end of the infusion pipe and the bottom end of the pressure guide channel, and finally the liquid level of the liquid medicine is positioned in the middle of the liquid storage pipe and is lower than the top end of the pressure communication pipe.

When the liquid medicine drops into the liquid storage pipe from the drip nozzle of the liquid dropping pipe, the liquid medicine can firstly drop on the top end of the pressure communicating pipe, due to the characteristics of liquid non-compressibility and non-directional transmission pressure, the pressure of the liquid medicine dropping pressure communicating pipe can be transmitted to a position closer to the bottom end of the pressure guiding channel by the liquid medicine in the pressure communicating hole, then the pressure sensing module measures the pressure change of the number of drops in unit time along with the transmission of the liquid medicine in the liquid storage pipe to the air in the pressure guiding channel, and also senses whether the drops of the liquid medicine drop in the liquid storage pipe, and then the pressure information measured by the pressure sensing module is transmitted to a data processing center or a device or an element such as a single chip and the like in a wireless or wired mode to carry out calculation processing.

The sizes of liquid medicine drops dripped from the dripping nozzle into the liquid storage pipe are similar, and the size of each liquid medicine drop can be measured by the liquid dripping pipe with the same size in advance, so that when a data processing center or a single chip receives a pressure message measured by the pressure sensing module, the liquid medicine flow and the liquid medicine flowing speed in unit time can be calculated according to the pressure message, medical personnel can understand the condition of the infusion system, and the flow of the infusion system can be adjusted according to the infusion requirement; or the data processing center or the single chip can judge the dosage of the liquid medicine in the infusion bag and whether the liquid medicine is used up and needs to be replaced or judge that the pressure of the dropping liquid pipe is lower than the pressure in the liquid storage pipe, which can cause the problem of blood backflow at the position of the disposable needle head.

Compared with the prior art, the invention has the beneficial effects that: the invention relates to a device which is shaped like a dropping funnel, changes continuous flow into point dropping flow and counts drop by drop, measures the dropping quantity falling in a dropping tube body by matching a pressure detector with the design of the dropping tube body, provides a data processing center or a single chip and other microcomputers for automatically calculating the transfusion speed, the transfusion quantity, whether a transfusion bag needs to be replaced and whether the blood backflow is possible, can replace the manual recording manpower and avoid the error which is possible to occur during the manual recording, can also monitor the transfusion process in real time, automatically monitors the transfusion process, and avoids medical carelessness or the occurrence of human accidents.

The invention is a device which can be operated independently, because the device is provided with a dropper body, the measured size of the drip is a fixed size, the drip size is not needed to be calibrated in addition by matching with a drip funnel of a transfusion system, and the stock of the transfusion bag can be correctly calculated only by knowing the volume of the transfusion bag which is used in cooperation, so the device can be used on any existing transfusion bag and does not need the cooperation of a transfusion bag manufacturer. In addition, the invention has small volume and low power consumption, can be implemented by using a battery and is very convenient to use. When the invention is connected to various feeding pipelines for feeding and metering, the connection mode can be an insertion mode, a threaded connection mode or other quick connector connection modes.

Drawings

FIG. 1 is a schematic cross-sectional view of a liquid flow measuring device in accordance with a preferred embodiment of the present invention;

FIG. 2 is another schematic cross-sectional view of a fluid flow measuring device in accordance with a preferred embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a preferred embodiment of the present invention with the reusable portion removed;

FIG. 4 is a top view of a perforated plate in accordance with a preferred embodiment of the present invention;

FIG. 5 is a schematic view of the preferred embodiment of the present invention installed in an infusion system;

FIG. 6 is a schematic diagram of a preferred embodiment of the present invention installed in a fluid delivery system for delivering fluid drop pressure data;

FIG. 7 is a schematic view of the preferred embodiment of the present invention installed in an infusion system with the fluid stopped from dripping;

FIG. 8 is a schematic view of a preferred embodiment of the present invention installed in an infusion system to regulate the flow of a medical fluid;

FIG. 9 is a schematic cross-sectional view of a single-wafer add-on according to a preferred embodiment of the present invention;

fig. 10 is an external view of a prior art fluid delivery system.

Description of the symbols:

10 dropper body 11 upper liquid storage tube

111 upper mounting base 112 pressure leading channel

113 induction core slot 114 coil slot

12 lower liquid storage tube 121 lower mounting seat

13 sealing ring 14 flow adjusting groove

15 flow regulating hole with hole plate 151

152 slot 153 outlet slot

154 connecting hole 16 magnet

17 pointed cone part of induction core rod 171

18 dropping tube 181 tip

182 rubber block for drip nozzle 19

20 pressure communicating pipe 21 bucket

22 pressure communication hole 30 pressure sensing module

40 driver 41 coil form

42 induction coil 43 electromagnetic induction tube

50 data transmission module 51 wireless transmission unit

60 outer cover 61 outer cover perforation

80 infusion bag 81 infusion tube

82 disposable needle 83 drip chamber

84 infusion regulating valve 90 infusion bag

91 infusion tube 911 tip

92 disposable needle 93 regulating transfusion valve

94 drip chamber 100 data processing center

101 single crystal wafer

Detailed Description

So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings.

As shown in fig. 1 to 4, the present invention is directed to a device shaped like a dropping funnel for changing a continuous flow into a spot-drop flow and counting the number of drops, which comprises a dropping tube body 10 shaped like a dropping funnel, and a pressure communicating tube 20, a pressure sensing module 30, three drivers 40, a data transmission module 50 and a cover 60 respectively disposed on the dropping tube body 10, wherein:

the dropper body 10 is provided with a straight upper liquid storage tube 11 and a straight lower liquid storage tube 12, the upper liquid storage tube 11 and the lower liquid storage tube 12 are arranged in a manner of being linearly connected from top to bottom, an upper mounting seat 111 is convexly arranged at the bottom of the peripheral surface of the upper liquid storage tube 11 outwards, a lower mounting seat 121 is convexly arranged at the top of the peripheral surface of the lower liquid storage tube 12 outwards, the upper mounting seat 111 and the lower mounting seat 121 are respectively a disk body and are combined up and down, and the combination means can be adhesion, buckling, locking or riveting.

A sealing ring 13 is embedded around the joint of the upper mounting seat 111 and the lower mounting seat 121, a flow adjusting groove 14 is formed in the middle of the joint of the upper mounting seat 111 and the lower mounting seat 121, the flow adjusting groove 14 is a disc-shaped space, the top side and the bottom side of the middle of the flow adjusting groove 14 are respectively communicated with the upper liquid storage pipe 11 and the lower liquid storage pipe 12, a pressure guiding channel 112 is arranged on one side of the upper mounting seat 111 in a penetrating manner in a vertically extending manner, and the inner end of the pressure guiding channel 112 is communicated with the flow adjusting groove 14;

a perforated plate 15 is inserted into the middle of the flow rate adjustment groove 14, the perforated plate 15 is a circular plate and the center thereof is concentric with the centers of the upper liquid storage pipe 11 and the lower liquid storage pipe 12, the periphery of the perforated plate 15 is clamped between the joint of the upper mounting seat 111 and the lower mounting seat 121 and fixed, the perforated plate 15 divides the flow rate adjustment groove 14 into an upper part and a lower part, three flow rate adjustment holes 151 are vertically arranged around the perforated plate 15 in a surrounding and equally-spaced arrangement manner, the three flow rate adjustment holes 151 are circular holes, and the area ratio of the three flow rate adjustment holes 151 is 1: 2: 4, a slot 152 is concavely formed in the center of the top surface of the perforated plate 15, an outlet slot 153 is concavely formed in the top surface of the perforated plate 15 at a position below the pressure guide passage 112, and a connecting hole 154 communicating the slot 152 and the outlet slot 153 is formed through the perforated plate 15.

An induction core groove 113 is respectively arranged at the position of the upper mounting seat 111 above each flow rate adjusting hole 151 in a penetrating way, each induction core groove 113 is a vertical hole, the inner end of each induction core groove 113 is communicated with the flow rate adjusting groove 14, the outer end of each induction core groove 113 is a closed end, a magnet 16 is respectively arranged at the position of the top surface of the upper mounting seat 111 corresponding to the outer end of each induction core groove 113, an induction core rod 17 which can be attracted and positioned by each magnet 16 is arranged in each induction core groove 113, a pointed cone 171 is formed at the inner end of each induction core rod 17, a circular coil groove 114 is arranged at the top surface of the upper mounting seat 111 in a downward concave way corresponding to the periphery of each induction core groove 113, and each coil groove 114 is concentric with each induction core groove 113.

A vertical dropping tube 18 is arranged on the top of the upper liquid storage tube 11 in a penetrating way, the width of the dropping tube 18 is narrower than the width of the upper liquid storage tube 11 and the lower liquid storage tube 12, a tip 181 is formed on the top of the dropping tube 18, a funnel-shaped dropping nozzle 182 is formed on the bottom of the dropping tube 18, the dropping nozzle 182 extends into the center of the top in the upper liquid storage tube 11, a rubber block 19 is embedded at the bottom end of the lower liquid storage tube 12, and the rubber block 19 seals the bottom end of the lower liquid storage tube 12.

The pressure communication pipe 20 is a vertical pipe body and is fixed in the middle of the upper liquid storage pipe 11 with the bottom end inserted into the insertion groove 152, the top end of the pressure communication pipe 20 forms a bucket part 21, the bucket part 21 is positioned right below the drip nozzle 182, a pressure communication hole 22 is formed inside the pressure communication pipe 20, the top end of the pressure communication hole 22 is higher than the inner end of the pressure guide channel 112, the bottom end of the pressure communication hole 22 is closer to the inner end of the pressure guide channel 112 than the top end, the pressure communication hole 22 is communicated with the connection hole 154 of the perforated plate 15, so that the inner end of the pressure guide channel 112 is extended to a position close to the periphery of the inner end of the pressure guide channel 112.

The pressure sensing module 30 is disposed on the top surface of the upper mounting seat 111 and located at the outer end of the pressure guiding channel 112, the pressure sensing module 30 seals the outer end of the pressure guiding channel 112, and the pressure sensing module 30 can measure the pressure change of the fluid, such as air, in the pressure guiding channel 112.

Each driver 40 is provided with a circular coil pipe 41 inserted in each coil groove 114 in a vertically slidable manner, an induction coil 42 is embedded in each coil pipe 41, and an electromagnetic induction pipe 43 is coupled to the inside of each coil pipe 41, so that the induction coil 42 and the electromagnetic induction pipe 43 of each driver 40 surround the induction core rod 17 in each induction core groove 113.

The data transmission module 50 is a circular ring and is detachably combined on the upper mounting seat 111, the data transmission module 50 surrounds the upper liquid storage tube 11, the pressure sensing module 30 is combined at the bottom of the data transmission module 50, the pressure sensing module 30 is electrically connected with the data transmission module 50, the data transmission module 50 comprises a wireless transmission unit 51, the data measured by the pressure sensing module 30 is wirelessly transmitted outwards by the wireless transmission unit 51, each magnet 16 is combined at the bottom of the data transmission module 50, the top end of the coil tube 41 of each driver 40 is connected at the bottom of the data transmission module 50, each induction coil 42 is electrically connected with the data transmission module 50, so that each induction coil 42 is driven by the data transmission module 50; when the data transmission module 50 is detached from the upper mounting seat 111, the pressure sensing module 30, the magnets 16 and the drivers 40 are moved away from the original position of the upper mounting seat 111.

The outer cover 60 is a circular cover and detachably covers the upper mounting seat 111, an outer cover through hole 61 is formed in the middle of the outer cover 60, the outer cover through hole 61 is sleeved around the dropping liquid tube 18, and the data transmission module 50, the pressure sensing module 30 and the magnets 16 are accommodated in the outer cover 60 and protected by the outer cover 60.

In the use of the preferred embodiment of the present invention, as shown in fig. 5 to 7, the present invention is exemplified in a medical infusion system, when the present invention is installed, the tip 181 of the dropping tube 18 of the present invention is inserted into the bottom of the infusion bag 90, the interior of the infusion bag 90 is filled with a liquid medicine, the tip 911 of the infusion tube 91 is inserted into the rubber block 19, an adjusting infusion valve 93 is arranged around the infusion tube 91, a dropping funnel 94 is connected in series between the adjusting infusion valve 93 and the present invention, the outer end of the infusion tube 91 is connected with a disposable needle 92, and the disposable needle 92 can be inserted into a human body to inject the liquid medicine.

The data transmission module 50 and each driver 40 of the present invention are matched, a data processing center 100 is provided outside the present invention, the data processing center 100 can receive the wireless signal transmitted by the wireless transmission unit 51 of the data transmission module 50 of the present invention, so as to perform calculation processing, then the result of the calculation processing is compared with the value manually input by the operator into the data processing center 100 for judgment, and then the wireless signal for controlling each driver 40 is sent to the wireless transmission unit 51 according to the judgment result, so that the data transmission module 50 selectively controls each driver 40 to operate. The operation of the data processing center 100 in conjunction with the present invention is described in detail below.

Referring to fig. 5 and 6, when the tip 181 of the drip tube 18 pierces into the infusion bag 90, the medical fluid flows from the infusion bag 90 into the drip tube 18 of the drip tube body 10 first, and then the medical fluid in the drip tube 18 drops down intermittently from the drip nozzle 182 in a drip manner and drops on the funnel 21 at the top end of the pressure communication tube 20, so that the medical fluid gradually fills the lower fluid reservoir 12, the flow rate adjustment tank 14, the pressure communication hole 22 of the pressure communication tube 20, and the connection hole 154 in the perforated plate 15, and the height of the medical fluid in the drip tube body 10 is finally located between the bottom end of the pressure guide passage 112 and the top end of the pressure communication tube 20. Then the liquid medicine in the dropper body 10 flows out to the disposable needle 92 through the liquid conveying pipe 91 which is punctured into the bottom of the dropper body 10, and is injected into the human body through the disposable needle 92.

In the process of the liquid medicine intermittently dropping from the dropping nozzle 182, the liquid medicine dropping on the bucket 21 applies an instantaneous pressure to the liquid in the pressure communication hole 22, and due to the characteristics of incompressible liquid and non-directional transmission pressure, the instantaneous pressure is transmitted to the periphery of the bottom end of the pressure guiding channel 112 through the liquid medicine in the connection hole 154, so that the liquid medicine at the position applies a pressure to the air in the pressure guiding channel 112, the pressure sensing module 30 can sense the magnitude of the instantaneous pressure generated by the liquid medicine intermittently dropping from the dropping nozzle 182, the amount of the liquid medicine dropping in unit time and the presence or absence of the liquid medicine dropping continuously, and the pressure data is transmitted to the data processing center 100 by the wireless transmission unit 51 of the data transmission module 50 in a wireless manner for receiving.

Since the size of each drop of liquid medicine dropped from the outlet of the drip nozzle 182 is similar, and the size of each drop of liquid medicine can be measured in advance and input to the data processing center 100, when the data processing center 100 receives the pressure data detected by the pressure sensing module 30, the flow rate of the liquid medicine and the flow rate of the liquid medicine in a unit time can be calculated accordingly, and the flow rate of the liquid medicine can be compared with the numerical value input to the data processing center 100 by an operator, such as a medical worker in advance, and then the data processing center 100 sends a wireless signal for controlling each driver 40 to adjust the flow rate of the liquid medicine to the numerical value input to the data processing center 100 by the medical worker in advance.

The data of the instantaneous pressure generated by the intermittent dropping of the liquid medicine can enable the data processing center 100 to eliminate the data of which the pressure is obviously lower than the average value and eliminate the condition of misreporting the number of drops. If the volume of the liquid medicine flowing out of the infusion bag 90 calculated by the data processing center 100 meets the volume of the liquid medicine in the infusion bag 90 and the data output by the pressure sensing module 30 shows that no liquid medicine is dropped, the data processing center 100 can judge that the liquid medicine in the infusion bag 90 has completely flowed, send a message to notify the medical staff to replace the infusion bag 90, and simultaneously send a wireless signal for controlling each driver 40 to prohibit the liquid medicine from flowing out to the wireless transmission unit 51 of the data transmission module 50 by the data processing center 100.

As shown in fig. 5 and 7, if the data output from the pressure sensing module 30 indicates that the drip nozzle 182 does not drip the liquid medicine, and the data processing center 100 calculates that the volume of the liquid medicine flowing out of the infusion bag 90 is less than the volume of the liquid medicine in the infusion bag 90, the data processing center 100 can determine that the pressure in the drip tube 18 is lower than or equal to the pressure output from the infusion tube 91, and that there is a possibility that blood flows back to the infusion tube 91 at the disposable needle 92, and at this time, the data processing center 100 sends a wireless signal to the wireless transmission unit 51 of the data transmission module 50 to control each driver 40 to prohibit the flow of the liquid medicine.

Referring to fig. 8, when the wireless transmission unit 51 of the data transmission module 50 receives the wireless signal transmitted by the data processing center 100 to control each driver 40 to adjust the flow rate of the liquid medicine or stop the outflow of the liquid medicine, the data transmission module 50 selectively drives the induction coil 42 of each driver 40 according to the required flow rate and flow velocity of the liquid medicine, so that each induction coil 42 drives each induction core rod 17 to move downward or return to the original position, and each induction core rod 17 closes the corresponding flow adjustment hole 151 by the pointed cone 171 of the induction core rod 17, or opens the corresponding flow adjustment hole 151. The structure for adjusting the infusion flow does not need to be externally provided with an electric and pneumatic device with a driving function, so that the whole weight of the infusion system can be as small as about 40 grams, and compared with the existing infusion system needing an additional driving device, the infusion system has the weight of only one 50 times, and the infusion system is more convenient to use.

As shown in fig. 4, since the area of the three flow rate adjustment holes 151 in the perforated plate 15 is 1: 2: 4, so that the flow rate adjustment holes 151 are selectively closed by driving the respective sensing pins 17, 8 types of changes in flow area, such as 0, 1 to 7, can be combined, and when a high flow rate and flow velocity of the chemical liquid are required, all three flow rate adjustment holes 151 are opened , and when the flow of the chemical liquid is required to be inhibited, all three flow rate adjustment holes 151 are closed by the three sensing pins 17. By means of the cooperation with the data processing center 100, the effects of calculating the infusion flow and the flow rate, detecting whether the infusion bag 90 needs to be replaced and detecting whether the disposable needle 92 has a blood backflow condition can be achieved, the whole-process monitoring effect during infusion can be achieved, and possible careless mistakes and accidents caused by manual recording of the infusion speed can be avoided.

As shown in fig. 1 and 3, since the outer cover 60 of the present invention is detachable, the pressure sensing module 30 is combined at the bottom of the data transmission module 50, the magnets 16 are combined at the bottom of the data transmission module 50, and the top end of the coil 41 of each driver 40 is connected at the bottom of the data transmission module 50, after the use of the present invention, the dropper body 10 contacting the liquid medicine is medical waste, which is a part that can only be used once, and after the use, the dropper body is discarded but not reusable, but the outer cover 60 and the data transmission module 50, together with the pressure sensing module 30, the magnets 16 and the drivers 40, can be detached from the upper mounting seat 111 of the dropper body 10 for reuse, so that the disposable dropper body 10 can be reused to achieve the effect of saving cost.

In addition to the aforementioned preferred embodiment, the data processing center 100 is externally disposed, and the external data processing center 100 receives the pressure data transmitted by the data transmission module 50, performs calculation processing on the pressure data and controls the operation of each driver 40, please refer to fig. 9, the function of the data processing center 100 can also be replaced by a single chip 101, the single chip 101 is disposed on the data transmission module 50, the single chip 101 is electrically connected to the data transmission module 50, the single chip 101 receives the pressure data measured by the pressure sensing module 30 directly transmitted by the data transmission module 50, and controls each driver 40 to drive each sensing core 17 to operate, and at this time, the data transmission module 50 may not be disposed with the wireless transmission unit 51. When the data transmission module 50 is detached from the upper mounting seat 111 of the dropper body 10, the single chip 101 can be detached together with the data transmission module 50, and the effect of repeated use is also achieved.

In addition to the above-described preferred embodiment, the present invention is configured such that the upper liquid storage tube 11 and the lower liquid storage tube 12 are divided into two parts to constitute the dropper body 10, and the upper mounting seat 111 around the upper liquid storage tube 11 and the lower mounting seat 121 around the lower liquid storage tube 12 may be directly integrated without providing the above-described sealing ring 13, thereby forming a structure of the liquid storage tube and the mounting seats provided around the liquid storage tube.

In addition to the above preferred embodiment, the pressure communication tube 20 is fixed at the center of the perforated plate 15, but instead of fixing the pressure communication tube 20 at the center of the perforated plate 15, a hollow bracket may be provided between the pressure communication tube 20 and the upper and lower

liquid storage tubes

11, 12, and the pressure communication tube 20 is fixed at the middle of the dropper body 10, at this time, the bottom end of the pressure communication tube 20 may be bent and extended toward the bottom end of the pressure guiding channel 112, so that the bottom end of the pressure communication hole 22 is closer to the bottom end of the pressure guiding channel 112 than the top end, and the pressure of the liquid medicine drip falling from the top end of the pressure communication tube 20 can be more smoothly transmitted into the pressure guiding channel 112 for the pressure sensing module 30 to measure.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid flow measuring device, comprising:

the drip tube comprises a drip tube body, a liquid storage tube, a mounting seat, a pressure guide channel, a drip tube and a funnel-shaped drip nozzle, wherein the liquid storage tube is arranged on the drip tube body, the mounting seat is formed around the liquid storage tube, the pressure guide channel is arranged in the mounting seat in a penetrating mode, the inner end of the pressure guide channel is communicated with the interior of the liquid storage tube, the top of the liquid storage tube is provided with the drip tube in a penetrating mode, the width of the drip tube is smaller than that of the liquid storage tube, and the bottom of the drip tube;

the pressure communicating pipe is fixed in the middle of the liquid storage pipe, the top end of the pressure communicating pipe is positioned under the drip nozzle, a pressure communicating hole is formed in the pressure communicating pipe, and the bottom end of the pressure communicating hole is closer to the inner end of the pressure guiding channel than the top end; and

the pressure sensing module is arranged at the outer end of the pressure guide channel, seals the outer end of the pressure guide channel and can measure the pressure change of the fluid in the pressure guide channel.

2. The fluid flow measuring device of claim 1, wherein a data transmission module is disposed in said mounting base, said data transmission module being electrically connected to said pressure sensing module for transmitting drop pressure data measured by said pressure sensing module.

3. The fluid flow measuring device of claim 2, wherein the data transmission module includes a wireless transmission unit that wirelessly transmits the droplet pressure data measured by the pressure sensing module.

4. The fluid flow measuring device of claim 2, wherein a single chip is disposed on the data transmission module, and the single chip is electrically connected to the data transmission module, receives the droplet pressure data transmitted by the data transmission module, and accordingly senses whether the droplet falls from the droplet tube, measures the number of the falling droplets, and calculates the flow rate and flow rate of the liquid medicine passing through the droplet tube per unit time.

5. The liquid flow measuring apparatus according to any one of claims 2 to 3, wherein the liquid storage tube is divided into an upper liquid storage tube and a lower liquid storage tube which are linearly connected, the mounting base is divided into an upper mounting base and a lower mounting base which are combined up and down, the upper and lower mounting bases are respectively formed around the bottom of the upper liquid storage tube and the top of the lower liquid storage tube, a flow regulating groove is formed in the middle of the joint of the upper mounting base and the lower mounting base, the middle of the flow regulating groove is communicated with the upper and lower liquid storage tubes, a perforated plate is embedded in the middle of the flow regulating groove, the perforated plate divides the flow regulating groove into an upper part and a lower part, and a plurality of flow regulating holes are formed in the periphery of the perforated plate

The installation seat is provided with a flow adjustment hole, the installation seat is provided with a plurality of flow adjustment holes, each flow adjustment hole is aligned with the corresponding flow adjustment hole, each flow adjustment hole is provided with an induction core groove, each induction core groove is a vertical hole, the inner end of each induction core groove is communicated with the corresponding flow adjustment hole, the outer end of each induction core groove is a closed end, the installation seat is provided with a magnet corresponding to the outer end of each induction core groove, an electromagnetic induction tube and an induction coil surrounding the electromagnetic induction tube are arranged around each induction core groove, each induction coil is electrically connected with the data transmission module, an induction core rod capable of being attracted and positioned by each magnet is arranged in each induction core groove, and the inner end of each induction core rod forms a pointed.

6. The liquid flow measuring device according to claim 5, wherein the pressure guide passage is formed to extend in an up-down direction through the upper mounting base, an inner end of the pressure guide passage communicates with the flow regulating groove, a slot is recessed in a middle of a top surface of the orifice plate, an outlet groove is recessed in a position of the top surface of the orifice plate below the pressure guide passage, a connection hole communicating the slot and the outlet groove is formed in an interior of the orifice plate, the pressure communication pipe is fixed by inserting a bottom end thereof into the slot, and the pressure communication hole communicates with the connection hole.

7. The liquid flow measuring device of claim 5, wherein the pressure guide passage is disposed through the upper mounting base in a vertically extending manner, and the data transmission module is detachably coupled to the upper mounting base and located beside the upper liquid storage tube; each induction core groove is formed on the upper mounting seat, a circular coil groove is arranged on the top surface of the upper mounting seat in a downward concave mode corresponding to the periphery of each induction core groove, each coil groove is concentric with each induction core groove, a circular coil pipe penetrates through each coil groove, each induction coil is embedded in each coil pipe, each electromagnetic induction pipe is combined on the inner surface of each coil pipe, the top end of each coil pipe is connected to the bottom of the data transmission module, the magnet is combined at the bottom of the data transmission module, and the pressure sensing module is combined at the bottom of the pressure sensing module.

8. The liquid flow measuring device according to claim 4, wherein the liquid storage tube is an upper liquid storage tube and a lower liquid storage tube which are linearly connected, the mounting seat is an upper mounting seat and a lower mounting seat which are combined up and down, the upper mounting seat and the lower mounting seat are respectively formed around the bottom of the upper liquid storage tube and the top of the lower liquid storage tube, a flow regulating groove is formed in the middle of the joint of the upper mounting seat and the lower mounting seat, the middle of the flow regulating groove is communicated with the upper liquid storage tube and the lower liquid storage tube, a perforated plate is embedded in the middle of the flow regulating groove, the perforated plate divides the flow regulating groove into an upper part and a lower part, and a plurality of flow regulating holes are formed in the periphery of the perforated plate

The installation base is provided with a flow adjusting hole, the installation base is provided with a plurality of flow adjusting holes, each flow adjusting hole is aligned with the corresponding flow adjusting hole, each flow adjusting hole is provided with an induction core groove, the induction core groove is a vertical hole, the inner end of each induction core groove is communicated with the flow adjusting groove, the outer end of each induction core groove is a closed end, a magnet is arranged at the position, corresponding to the outer end of each induction core groove, of the installation base, an electromagnetic induction tube and an induction coil surrounding the electromagnetic induction tube are arranged around each induction core groove, each induction coil is electrically connected with the data transmission module, each induction coil can be controlled by the single chip, an induction core rod capable of being attracted and positioned by each magnet is arranged in each induction core groove, and the inner end of.

9. The liquid flow measuring device according to claim 8, wherein the pressure guide passage is formed to extend in an up-down direction through the upper mounting base, an inner end of the pressure guide passage communicates with the flow regulating groove, a slot is recessed in a middle of a top surface of the orifice plate, an outlet groove is recessed in a position of the top surface of the orifice plate below the pressure guide passage, a connection hole communicating the slot and the outlet groove is formed in an interior of the orifice plate, the pressure communication pipe is fixed by inserting a bottom end thereof into the slot, and the pressure communication hole communicates with the connection hole.

10. The liquid flow measuring device of claim 8, wherein the pressure guide passage is formed to extend in an up-and-down direction through the upper mounting base, and the data transmission module is detachably coupled to the upper mounting base and located beside the upper liquid storage pipe; each induction core groove is formed on the upper mounting seat, a circular coil groove is arranged on the top surface of the upper mounting seat in a downward concave mode corresponding to the periphery of each induction core groove, each coil groove is concentric with each induction core groove, a circular coil pipe penetrates through each coil groove, each induction coil is embedded in each coil pipe, each electromagnetic induction pipe is combined on the inner surface of each coil pipe, the top end of each coil pipe is connected to the bottom of the data transmission module, the magnet is combined at the bottom of the data transmission module, and the pressure sensing module is combined at the bottom of the pressure sensing module.