CN114111922A - Micro-flow detector and detection method - Google Patents
Micro-flow detector and detection method Download PDFInfo
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- CN114111922A CN114111922A CN202111386947.7A CN202111386947A CN114111922A CN 114111922 A CN114111922 A CN 114111922A CN 202111386947 A CN202111386947 A CN 202111386947A CN 114111922 A CN114111922 A CN 114111922A
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- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 74
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 235000014676 Phragmites communis Nutrition 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 18
- 238000012544 monitoring process Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 6
- 230000002457 bidirectional effect Effects 0.000 abstract description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
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- 238000012986 modification Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000005465 channeling Effects 0.000 description 1
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- 230000014509 gene expression Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/06—Indicating or recording devices
- G01F15/061—Indicating or recording devices for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
A micro-flow detector and a detection method thereof belong to the technical field of fluid detection. The micro-flow valve comprises an outer shell, a sensor and a micro-flow valve body, wherein the micro-flow valve body is arranged in the outer shell and comprises a valve body shell, a liquid pipe joint, a spring and a valve core group, a loop which is communicated end to end is processed in the valve body shell, a left side port and a right side port which are communicated with the outside are respectively processed at two opposite angles of the loop, the liquid pipe joints are respectively arranged at the left side port and the right side port, one end of each liquid pipe joint is respectively connected with the valve core group through the spring in the loop, the other end of each liquid pipe joint penetrates through the outer shell, two opposite angles which are communicated with the outside are removed from the loop, and the sensors are respectively arranged on the outer side wall of the valve body shell corresponding to the other two opposite angles. The invention can realize the detection of bidirectional flow in the same pipeline, and the detector is suitable for the detection of the flow condition of the fluid, has very sensitive reflection on trace leakage and can effectively test the leakage condition in the system.
Description
Technical Field
The invention relates to a micro-flow detector and a detection method thereof, belonging to the technical field of fluid detection.
Background
Because the hydraulic system is closed and opaque, the internal operation condition of the system is difficult to observe, so that the operation state of the hydraulic system is known in practice, and the fault analysis is very difficult. The existing devices capable of testing the fluid flow in the market are more, such as target type and piston type flow switches and other products, and the flow of the fluid can be detected.
The target type (baffle type) flow meter is used for detecting media such as air, oil and water flowing in a single direction or a double direction. When fluid flows through the pipeline, the baffle deflects to enable the single-pole double-throw microswitch to act on a set flow rate and output a switch signal; during bidirectional detection, the baffle plate is deflected to push the magnetic module to move upwards so as to drive the switch module to act.
The disadvantages are that: it is not sensitive to micro-flow detection. Because the flow is small, the acting force applied to the sensor is small, and the energy consumed by the detection element in the flow detector cannot be ignored at the moment. Some instruments can adjust to a small signal alarm in the field, but the effect is not reliable. For small flows, the small flow rate must be adapted in principle, and the small signal alarm is a set result and is not manually adjusted.
The piston type flow switch comprises: CN208466183U A piston type flow induction switch built-in piston drives the piston to move according to the change of the flow, the permanent magnet in the piston matches with the reed pipe to give out the switch signal, the piston is reset by the spring force;
the disadvantages are that: the device is sensitive to micro-flow, but cannot judge the flow direction of fluid in a closed fluid pipeline, and the switch has directionality, so that the detection of bidirectional flow cannot be realized in the same pipeline, and the application occasion is limited.
Therefore, a new micro-flow detector is needed to solve the above technical problems.
Disclosure of Invention
The present invention has been developed in order to solve the problem of the prior art fluid testing devices that do not enable bi-directional flow testing in the same circuit, and a brief summary of the invention is provided below in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.
The technical scheme of the invention is as follows:
little flow detector, including shell body, sensor and little flow valve body, install little flow valve body in the shell body, little flow valve body includes the valve body casing, liquid pipe joint, spring and case group, the inside processing of valve body casing has the return circuit of head and the tail intercommunication, two diagonal departments in return circuit have processed left side mouth and right side mouth and external intercommunication respectively, liquid pipe joint is installed respectively to left side mouth and right side mouth, liquid pipe joint one end is established through spring and case group respectively inside the return circuit and is connected, the liquid pipe joint other end runs through the shell body setting, the return circuit is except two diagonal angles with external intercommunication, all install the sensor on the valve body casing lateral wall that two diagonal angles correspond in addition.
Preferably: the circuit is a rectangular circuit, and the inner walls of the top transverse pipeline and the bottom transverse pipeline of the rectangular circuit are both in sliding contact with a valve core group.
Preferably: and a permanent magnet is arranged in the valve core group.
The micro-flow detection method is realized based on a micro-flow detector, the micro-flow detector is arranged on a pipeline for fluid circulation to be detected, and the method specifically comprises the following steps:
initial position: when the fluid to be detected in the pipeline does not flow, the valve core groups on the left side and the right side in the micro-flow valve body are in initial positions under the pushing force of the spring, the permanent magnet is far away from the reed pipe sensor in the permanent magnet, and the control panel does not work;
monitoring of the flow of the fluid to be tested from left to right: when fluid to be detected in the pipeline flows from left to right, the fluid flows into the inlet loop from the left port of the micro-flow valve body, the fluid to be detected pushes the right valve core group to move towards the right side, and the fluid to be detected flows out from the right port of the micro-flow valve body after passing through the guide end of the right valve core group. At the moment, the left valve core group is fixed at the initial position, the right permanent magnet moves rightwards along with the right valve core group to be close to the right reed pipe sensor, the right reed pipe sensor is attracted under the magnetic control action of the permanent magnet by the reed pipe sensor, the control panel starts to work, and the right forward indicator lamp on the control panel is on;
monitoring of the flow of the fluid to be tested from right to left: when fluid to be detected in the pipeline flows from right to left, the fluid flows into the inlet loop from the right port of the micro-flow valve body, the fluid to be detected pushes the left valve core group to move towards the left side, and the fluid to be detected flows out from the left port of the micro-flow valve body after passing through the guide end of the left valve core group. At the moment, the right valve core group is fixed at the initial position, the left permanent magnet moves left along with the left valve core group to be close to the left reed pipe sensor, the left reed pipe sensor is attracted under the magnetic control action of the permanent magnet by the reed pipe sensor, the control panel starts to work, and the left reverse indicator lamp on the control panel is on.
In order to solve the problem that the valve core group can move left and right according to the fluid pressure, the invention provides the technical scheme that:
preferably: the valve core group comprises a sealing end and a guiding end which are fixedly connected left and right;
the guide end outer wall is provided with a guide protrusion, a liquid flow groove is formed between the guide protrusion and the outer side wall of the guide end, the liquid flow groove is of a wedge-shaped structure, and the liquid flow groove is divided into long grooves and short grooves which are distributed in a staggered mode.
Preferably: the number of the guide protrusions is at least four, and the guide protrusions are arranged on the outer wall of the guide end in an equidistant circumference mode.
Preferably: the permanent magnet is arranged in the sealing end, and two ends of the spring are respectively connected with the sealing end and the liquid pipe joint;
the spring is connected with the liquid pipe joint through the spring seat.
Preferably: the liquid pipe joint is installed inside the outer shell through a fixing clamp.
In order to display the flow direction of fluid in time, the invention adopts the technical scheme that:
preferably: still include control panel and battery, the sensor includes sensor terminal box and tongue tube sensor, installs the tongue tube sensor in the sensor terminal box, tongue tube sensor and control panel electric connection, and the battery passes through the battery case and installs in the shell, battery and control panel electric connection.
In order to be suitable for fluids with different components and flow rates and adjust the sensitivity of the sensor, the invention adopts the technical scheme that:
preferably: a waist-shaped hole is processed on the sensor junction box, an adjusting bolt is arranged in the waist-shaped hole, and the sensor junction box is installed at the top of the valve body shell through the adjusting bolt.
The invention has the following beneficial effects:
1. the micro-flow detector can detect the flow condition of fluid in the system, and is particularly sensitive to weak flow;
2. the micro-flow detector can realize the detection of bidirectional flow in the same pipeline, is suitable for the detection of the flow condition of fluid, has very sensitive reflection on trace leakage, and can effectively test the leakage condition in the system;
3. the micro-flow detector can effectively monitor a micro-flow test instrument of the hydraulic system, and can simultaneously complete the functions of detecting the flow condition of oil in the system, monitoring the operation condition of the system, analyzing the internal leakage fault of the system and the like;
4. the micro-flow detector of the invention adopts magnetic induction triggering detection equipment, the valve body is made of stainless steel, and the internal fluid is not in contact with external electronic detection equipment and cannot corrode a detection element. The fluid working cavity is closed, can bear higher pressure, has wide applicable pressure range, and can be normally used by connecting the detector into a pipeline of the system in series by using a special high-pressure rubber pipe;
5. the micro-flow detector is suitable for fluids with different components and flow rates, and the sensitivity of the sensor can be adjusted through the waist-shaped hole;
6. the micro-flow detector of the invention can also be used in the occasions of equipment application such as liquid level monitoring, and the like, such as: the water circulation control, water inlet and outlet control, water heating control, water pump switch control, electromagnetic valve on-off control or water outlet power failure and water outlet power on control of a wet grinder, a humidifier, an electric water heater, a solar water heater, an air conditioner and other water systems, and the internal leakage detection of a hydraulic system.
Drawings
FIG. 1 is a perspective view of a microfluidic detector;
FIG. 2 is a block diagram of a micro-flow detector;
FIG. 3 is a top view of FIG. 2;
fig. 4 is a schematic view showing the construction of a battery pack according to the present invention;
FIG. 5 is a perspective view of the valve core set of the present invention;
FIG. 6 is a block diagram of the valve core set of the present invention;
FIG. 7 is a state diagram of a micro flow valve body in step one of the second embodiment;
FIG. 8 is a state diagram of a microfluidic valve body according to step two of the second embodiment;
FIG. 9 is a cross-sectional view A-A of FIG. 8;
FIG. 10 is a state diagram of a micro flow valve body according to step three of the second embodiment;
FIG. 11 is a sectional view taken along line B-B of FIG. 10;
FIG. 12 is a perspective view of the valve body housing of the present invention;
FIG. 13 is a block diagram of the valve body housing of the present invention;
FIG. 14 is a perspective view of the spring seat of the present invention;
FIG. 15 is a perspective view of the sensor junction box of the present invention;
FIG. 16 is a block diagram of the control panel of the present invention;
FIG. 17 is a circuit diagram of the control panel of the present invention;
in the figure, 1-a valve body shell, 2-a liquid pipe joint, 3-a spring, 4-a valve core group, 5-a permanent magnet, 6-an outer shell, 7-a sensor, 8-a micro-flow valve body, 9-a fixing clamp, 10-a control panel, 11-a loop, 111-a left side port, 112-a right side port, 11-1-a top transverse pipeline, 11-2-a bottom transverse pipeline, 31-a spring seat, 41-a sealing end, 42-a guiding end, 421-a guiding bulge, 422-a liquid flow groove, 61-a battery box, 71-a sensor junction box, 72-a reed pipe sensor, 711-a kidney-shaped hole and 712-an adjusting bolt.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The connection mentioned in the invention is divided into fixed connection and detachable connection, the fixed connection is non-detachable connection and includes but is not limited to folding edge connection, rivet connection, bonding connection, welding connection and other conventional fixed connection modes, the detachable connection includes but is not limited to threaded connection, snap connection, pin connection, hinge connection and other conventional detachment modes, when the specific connection mode is not clearly limited, at least one connection mode can be found in the existing connection modes by default to realize the function, and the skilled person can select according to the needs. For example: the fixed connection selects welding connection, and the detachable connection selects hinge connection.
The first embodiment is as follows: the micro-flow detector of the embodiment is described with reference to fig. 1 to 17, and includes an outer shell 6, a sensor 7 and a micro-flow valve body 8, the micro-flow valve body 8 is installed in the outer shell 6, the micro-flow valve body 8 includes a valve body shell 1, a liquid pipe connector 2, a spring 3 and a valve core group 4, a loop 11 that is connected end to end is processed inside the valve body shell 1, a left port 111 and a right port 112 are respectively processed at two opposite corners of the loop 11 to be communicated with the outside, the liquid pipe connector 2 is respectively installed at the left port 111 and the right port 112, one end of the liquid pipe connector 2 is respectively connected with the valve core group 4 through the spring 3 inside the loop 11, the other end of the liquid pipe connector 2 penetrates through the outer shell 6, the loop 11 excludes two opposite corners that are communicated with the outside, the sensor 7 is installed on the outer side walls of the valve body shell 1 corresponding to the other two opposite corners, the liquid pipe connector 2, Spring 3 and case group 4 quantity are two, distribute in 8 left and right sides of miniflow valve body, and valve body housing 1 is the rectangle, for preventing two sensor 7 conflicts, and the independent adjustment of being convenient for, two sensors 7 separately install on valve body housing 1.
The circuit 11 is a rectangular circuit, the inner walls of a top transverse pipeline 11-1 and a bottom transverse pipeline 11-2 of the rectangular circuit are both provided with a valve core group 4 in a sliding contact mode, through holes are machined in four side walls of a valve body shell 1 when the circuit 11 is machined, the through holes in the left side and the right side of the valve body shell 1 are a left side port 111 and a right side port 112 and used as fluid circulation, and the through holes in the front side and the rear side of the valve body shell 1 are machining process holes and need to be sealed by screw plugs.
And a permanent magnet 5 is arranged in the valve core group 4 and is used for generating magnetic on-off reaction with a sensor 7.
The valve core group 4 comprises a sealing end 41 and a guiding end 42 which are fixedly connected left and right, and the sealing end 41 plays a role in sealing; the terminal surface processing of sealed end 41 has the mounting groove, and the permanent magnet 5 is arranged in the mounting groove bottom, and the mounting groove top is provided with spring holder 31 of spring 3.
The outer wall of the guide end 42 is provided with a guide protrusion 421, a liquid flow groove 422 is formed between the guide protrusion 421 and the outer side wall of the guide end 42, the liquid flow groove 422 is of a wedge-shaped structure, the liquid flow groove 422 is machined by an arc surface, machining conditions are met, and the liquid flow groove 422 is divided into long grooves and short grooves which are distributed in a staggered mode. The long groove is close to the end face of the sealing end, and the fluid groove 422 is in a wedge-shaped design with alternate lengths, so that the movement amount of the valve core group 4 is in linear relation with the flow; the long groove is arranged close to the end face of the sealing end, so that the sealing distance is reduced, and the valve core group 4 can be conveniently reset in time when not working.
The wedge-shaped structure of the liquid flow groove mainly plays a gradual opening process and can prevent the valve core group 4 from impacting; more importantly, the linear relation between the opening degree and the flow rate can be realized.
The number of the guide protrusions 421 is even, and at least four, the guide protrusions are circumferentially arranged on the outer wall of the guide end 42 at equal intervals, the guide end 42 is cross-shaped or m-shaped, and the like, when the sealing end 41 leaves the sealing surface, the valve body is conducted, the guide ends play a role in guiding and channeling, and the sealing surface is the inner wall of the middle part of the top transverse pipeline 11-1 and the bottom transverse pipeline 11-2.
The permanent magnet 5 is arranged in the sealing end 41, and two ends of the spring 3 are respectively connected with the sealing end 41 and the liquid pipe joint 2;
the spring 3 is connected to the liquid pipe connector 2 via a spring seat 31. The outer side of the spring seat 3 is processed with threads and is connected with a shoulder in the valve body 3 after being tightened.
The liquid pipe joint 2 is installed inside the outer housing 6 by a fixing clip 9.
Still include control panel 10 and battery, last switch, power detection lamp, backward flow pilot lamp, the forward pilot lamp of having of control panel, sensor 7 includes sensor terminal box 71 and tongue tube sensor 72, installs tongue tube sensor 72 in the sensor terminal box 71, tongue tube sensor 72 and control panel 10 electric connection, and the battery passes through battery case 61 to be installed in shell body 6, battery and control panel electric connection.
The sensor junction box 71 is provided with a waist-shaped hole 711, an adjusting bolt 712 is arranged in the waist-shaped hole 711, the sensor junction box 71 is mounted at the top of the valve body shell 1 through the adjusting bolt 712, the waist-shaped hole 711 can enable the sensor junction box 71 to move transversely and is suitable for fluids with different components and flow rates, the sensitivity of the sensor can be adjusted through the waist-shaped hole, and the purposes of detecting whether liquid flows or detecting the lowest flow are achieved.
As shown in fig. 17, two reed pipe sensors 72 are respectively installed in two sensor junction boxes 71, the reed pipe sensors 72 are installed on the valve body housing 1, and when no fluid flows in the valve body housing 1, the reed pipe sensors 72 should be in an off state to indicate that the circuit is not on. When fluid flows in the valve body shell 1 or the flow reaches the set requirement, the valve core group 4 is pushed to move, the permanent magnet 5 arranged in the valve core group 4 is close to the reed pipe sensor 72, the reed inside can be triggered to be closed, the switch of the reed pipe sensor 72 is switched on, the loop is switched on, and the indicator light is on.
The second embodiment is as follows: referring to fig. 1 to 17, this embodiment is described, and based on the first embodiment, the microfluidic detection method of this embodiment includes that a microfluidic detector is installed on a pipeline through which a fluid to be detected flows, specifically:
step one, initial position: as shown in fig. 7, when the fluid to be detected in the pipeline does not flow, the valve core sets 4 on the left and right sides in the micro-flow valve body 8 are in the initial position under the thrust of the spring 3, the permanent magnet 5 is far away from the reed pipe sensor 72 in the permanent magnet 5, and the control panel 10 does not work;
step two, monitoring the flow of the fluid to be detected from left to right: as shown in fig. 8 and 9, when the fluid to be detected in the pipeline flows from left to right, the fluid flows into the inlet circuit 11 from the left port 111 of the micro flow valve body 8, the fluid to be detected pushes the right spool group 4 to move to the right, and the fluid to be detected flows out from the right port 112 of the micro flow valve body 8 after passing through the guide end 42 of the right spool group 4. At the moment, the left valve core group 4 is fixed at the initial position, the right permanent magnet 5 moves rightwards along with the right valve core group 4 to be close to the right reed pipe sensor 72, and the reed pipe sensor 72 enables the right reed pipe sensor 72 to be attracted under the magnetic control effect of the permanent magnet 5, the control panel 10 starts to work, and a right forward indicator lamp on the control panel 10 is on;
step three, monitoring the flow of the fluid to be detected from right to left: monitoring of the flow of the fluid to be tested from right to left when the fluid to be tested flows from right to left in the pipeline, as shown in fig. 10 and 11: when the fluid to be detected in the pipeline flows from right to left, the fluid flows into the inlet circuit 11 from the right port 112 of the micro flow valve body 8, the fluid to be detected pushes the left valve core group 4 to move towards the left, and the fluid to be detected flows out from the left port 111 of the micro flow valve body 8 after passing through the guide end 42 of the left valve core group 4. At this time, the right valve core group 4 is not moved at the initial position, the left permanent magnet 5 moves left along with the left valve core group 4 to approach the left reed pipe sensor 72, and the reed pipe sensor 72 attracts the left reed pipe sensor 72 under the magnetic control effect of the permanent magnet 5, so that the control panel 10 starts to work, and the left reverse indicator light on the control panel 10 is on.
The third concrete implementation mode: the embodiment is described with reference to fig. 1 to 17, and based on the first embodiment, the microfluidic detection method of the embodiment includes that a microfluidic detector is installed on a pipeline through which a fluid to be detected flows, a flow scale is drawn on a microfluidic valve body 8 close to a sensor 7, the mounting position of the sensor 7 is adjusted according to the scale on the microfluidic valve body 8 to detect the microfluidic or detect the quantitative flow, so that a detection result can be obtained more intuitively, that is, the minimum switching value can be set by moving the sensor according to a scale, and when the flow reaches a set value, the sensor can be triggered by the opening degree of a valve core, specifically:
initial position: when the fluid to be detected in the pipeline does not flow, the valve core groups 4 on the left side and the right side in the micro-flow valve body 8 are in the initial positions under the thrust of the spring 3, the permanent magnet 5 is far away from the reed pipe sensor 72 in the permanent magnet 5, and the control panel 10 does not work;
monitoring of the flow of the fluid to be tested from left to right: when the fluid to be detected in the pipeline flows from left to right, the fluid flows into the inlet circuit 11 from the left port 111 of the micro flow valve body 8, the fluid to be detected pushes the right valve core set 4 to move towards the right side, and the fluid to be detected flows out from the right port 112 of the micro flow valve body 8 after passing through the guide end 42 of the right valve core set 4. At the moment, the left valve core group 4 is fixed at the initial position, when the fluid reaches the set flow, the position of the reed switch sensor 72 corresponds to the scale marks representing different flows, the right permanent magnet 5 moves rightwards along with the right valve core group 4 to be close to the right reed switch sensor 72, and the reed switch sensor 72 enables the right reed switch sensor 72 to be attracted under the magnetic control action of the permanent magnet 5, so that the control panel 10 starts to work, and the right forward indicator lamp on the control panel 10 is lightened to indicate that the flow reaches the set flow value;
monitoring of the flow of the fluid to be tested from right to left: when the fluid to be detected in the pipeline flows from right to left, the fluid flows into the inlet circuit 11 from the right port 112 of the micro flow valve body 8, the fluid to be detected pushes the left valve core group 4 to move towards the left, and the fluid to be detected flows out from the left port 112 of the micro flow valve body 8 after passing through the guide end 42 of the left valve core group 4. At this time, the right valve core group 4 is fixed at the initial position, when the fluid reaches the set flow rate, the position of the reed switch sensor 72 corresponds to the scale marks representing different flow rates, the left permanent magnet 5 moves leftwards along with the left valve core group 4 to approach the left reed switch sensor 72, and the reed switch sensor 72 enables the left reed switch sensor 72 to be attracted under the magnetic control effect of the permanent magnet 5, so that the control panel 10 starts to work, and the left reverse indicator light on the control panel 10 is on.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore, the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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 (10)
1. A microfluidic detector, characterized by: comprises an outer shell (6), a sensor (7) and a micro-flow valve body (8), wherein the micro-flow valve body (8) is arranged in the outer shell (6), the micro-flow valve body (8) comprises a valve body shell (1), a liquid pipe joint (2), a spring (3) and a valve core group (4), a loop (11) which is communicated end to end is processed inside the valve body shell (1), a left side port (111) and a right side port (112) are respectively processed at two opposite corners of the loop (11) and are communicated with the outside, the liquid pipe joint (2) is respectively installed at the left side port (111) and the right side port (112), one end of the liquid pipe joint (2) is respectively connected with the valve core group (4) through the spring (3) inside the loop (11), the other end of the liquid pipe joint (2) penetrates through the outer shell (6), the loop (11) is divided into two opposite corners which are communicated with the outside, and the outer side walls of the other two valve body shells (1) which are opposite in angle are provided with sensors (7).
2. The microfluidic detector of claim 1, wherein: the loop (11) is a rectangular loop, and the inner walls of the top transverse pipeline (11-1) and the bottom transverse pipeline (11-2) of the rectangular loop are both in sliding contact with a valve core group (4).
3. The microfluidic detector of claim 2, wherein: and a permanent magnet (5) is arranged in the valve core group (4).
4. A microfluidic detector as in claim 3, wherein: the valve core group (4) comprises a sealing end (41) and a guiding end (42) which are fixedly connected left and right;
the guide end (42) outer wall processing has guide protrusion (421), forms flow liquid groove (422) between guide protrusion (421) and the lateral wall of guide end (42), and flow liquid groove (422) are wedge structure, and flow liquid groove (422) divide into elongated slot and short groove staggered distribution.
5. The microfluidic detector of claim 4, wherein: the number of the guide protrusions (421) is even, and the guide protrusions are at least four and are arranged on the outer wall of the guide end (42) in an equidistant circumference mode.
6. The microfluidic detector of claim 5, wherein: the permanent magnet (5) is installed in the sealing end (41), and two ends of the spring (3) are respectively connected with the sealing end (41) and the liquid pipe joint (2); the spring (3) is connected with the liquid pipe connector (2) through a spring seat (31).
7. The microfluidic detector of claim 6, wherein: the liquid pipe joint (2) is arranged inside the outer shell (6) through a fixing clamp (9).
8. The microfluidic detector of claim 1, wherein: still include control panel (10) and battery, sensor (7) are including sensor terminal box (71) and tongue tube sensor (72), install tongue tube sensor (72) in sensor terminal box (71), and tongue tube sensor (72) and control panel (10) electric connection, and the battery passes through battery case (61) to be installed in shell body (6), battery and control panel electric connection.
9. The microfluidic detector of claim 8, wherein: a waist-shaped hole (711) is processed on the sensor junction box (71), an adjusting bolt (712) is arranged in the waist-shaped hole (711), and the sensor junction box (71) is installed at the top of the valve body shell (1) through the adjusting bolt (712).
10. A microfluidic detection method implemented based on the microfluidic detector of claim 8 or 9, the microfluidic detector being mounted on a pipeline through which a fluid to be detected flows, the method comprising:
initial position: when the fluid to be detected in the pipeline does not flow, the valve core groups (4) on the left side and the right side in the micro-flow valve body (8) are in an initial position under the thrust of the spring (3), the permanent magnet (5) is far away from a reed pipe sensor (72) in the permanent magnet (5), and the control panel (10) does not work;
monitoring of the flow of the fluid to be tested from left to right: when fluid to be detected in a pipeline flows from left to right, the fluid flows into the inlet loop (11) from the left side port (111) of the micro-flow valve body (8), the fluid to be detected pushes the right side valve core group (4) to move towards the right side, and the fluid to be detected flows out from the right side port (112) of the micro-flow valve body (8) after passing through the guide end (42) of the right side valve core group (4). At the moment, the left valve core group (4) is fixed at the initial position, the right permanent magnet (5) is displaced rightwards along with the right valve core group (4) to be close to the right reed pipe sensor (72), the right reed pipe sensor (72) is attracted under the magnetic control action of the permanent magnet (5), the control panel (10) starts to work, and the right forward indicator light on the control panel (10) is on;
monitoring of the flow of the fluid to be tested from right to left: when fluid to be detected in the pipeline flows from right to left, the fluid flows into the inlet loop (11) from the right side port (112) of the micro-flow valve body (8), the fluid to be detected pushes the left side valve core group (4) to move towards the left side, and the fluid to be detected flows out from the left side port (111) of the micro-flow valve body (8) after passing through the guide end (42) of the left side valve core group (4). At the moment, the right valve core group (4) is fixed at the initial position, the left permanent magnet (5) is leftwards displaced along with the left valve core group (4) to be close to the left reed pipe sensor (72), the left reed pipe sensor (72) is attracted under the magnetic control action of the permanent magnet (5), the control panel (10) starts to work, and the left reverse indicator light on the control panel (10) is on.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111386947.7A CN114111922A (en) | 2021-11-22 | 2021-11-22 | Micro-flow detector and detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111386947.7A CN114111922A (en) | 2021-11-22 | 2021-11-22 | Micro-flow detector and detection method |
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