CN211477240U - Liquid flow detection device - Google Patents
Liquid flow detection device Download PDFInfo
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- CN211477240U CN211477240U CN202020340621.5U CN202020340621U CN211477240U CN 211477240 U CN211477240 U CN 211477240U CN 202020340621 U CN202020340621 U CN 202020340621U CN 211477240 U CN211477240 U CN 211477240U
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- spring
- connecting pipe
- liquid flow
- liquid
- hard tube
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Abstract
The utility model discloses a liquid flow detection device belongs to flow measurement technical field, including connecting pipe, U type hard tube, guide way and measuring mechanism, U type hard tube both ends link to each other with the connecting pipe respectively, and measuring mechanism includes spring holder, dynamometry spring, pointer, scale and dog, and U type hard tube is kept away from connecting pipe end and spring holder one end fixed connection, and the spring holder other end links to each other with the dynamometry spring, is provided with the pointer on the dynamometry spring, and the dynamometry spring is kept away from spring holder end and is linked to each other with the dog. The utility model has the advantages of the precision is high and the accuracy is high.
Description
Technical Field
The utility model belongs to the technical field of flow measurement, concretely relates to liquid flow detection device.
Background
Flow detection can be roughly classified into two types in terms of detection principle: 1. and the electromagnetism type converts the oil flow velocity signal in the pipeline into an electromagnetic signal, and then converts the electromagnetic signal into the reading of a pointer on a corresponding dial plate. Because the number of signal conversion times of the measuring instrument is large, the accumulated error of the conversion inevitably influences the reading precision of the instrument. 2. And (3) pressure difference, namely, the liquid pressure difference between the inlet end and the outlet end of the pipeline is utilized, the gear is driven to rotate, and the flow of the oil liquid is calculated according to the revolution number of the gear and the structural parameters of the gear. Due to the particularity of the tooth profile, the accuracy of the oil discharge of the gear is difficult to guarantee.
Disclosure of Invention
An object of the utility model is to provide a liquid flow detection device that precision is high and accuracy is high.
The utility model aims at realizing through the following technical scheme:
a liquid flow detection device characterized in that: including connecting pipe, U type hard tube, guide way and measuring mechanism, U type hard tube both ends link to each other with the connecting pipe respectively, measuring mechanism includes spring holder, dynamometry spring, pointer, scale and dog, connecting pipe end and spring holder one end fixed connection are kept away from to U type hard tube, and the spring holder other end links to each other with the dynamometry spring, be provided with the pointer on the dynamometry spring, the dynamometry spring is kept away from spring holder end and is linked to each other with the dog.
Preferably, the U-shaped hard pipe is a drift diameter hard pipe.
Preferably, the connecting pipe is a hose.
Preferably, the end of the connecting tube is provided with an internally threaded connecting nut.
Preferably, the connecting pipe is connected with the U-shaped hard pipe through a flange.
Preferably, two guide grooves are adopted.
Preferably, the U-shaped hard tube, the guide groove and the detection mechanism are arranged in the shell.
Preferably, the shell is a transparent shell.
The working principle is as follows: when no liquid flows in the U-shaped hard tube, the force measuring spring is in a free state, and the pointer returns to zero. When the device is connected in series in a pipeline through the connecting hose, the flow of liquid inevitably impacts the bottom of the U-shaped hard pipe, so that the U-shaped hard pipe moves along the guide groove to compress the force measuring spring, and the compression force is inherently and inevitably connected with the flow. According to the impulse theorem of the fluid:
F=ρQ（v1-v2）
in the formula: f, impact force of the liquid on the solid wall; ρ — density of the flowing liquid; q is the flow rate of the liquid; v. of1-flow rate of liquid into the U-shaped rigid tube; v. of2-the flow rate of the liquid exiting the U-channel.
The U pipeline is of equal diameter, the flow area of the U pipeline is A, and according to the continuity principle of fluid flow:
v1=v2=Q/A=V
because v is1、v2Are vectors, equal in magnitude and opposite in direction.
Therefore: f =2 ρ Q V =2 ρ Q2/A
Thus: q2=FA/2ρ
In the formula: f can be displayed by a pointer of the detection mechanism; the density of the rho liquid is determined by the grade of the liquid; the cross-sectional area of the A pipeline is determined by the pipe diameter.
The beneficial effects of this technical scheme are as follows:
the utility model provides a liquid flow detection device, preparation work before the measurement, look for relevant data and verify the density rho of the liquid that is measured, then return to zero the spring pointer earlier, establish ties this device in the liquid way again; the detected liquid flow is totally flowed to the device; reading F after the pointer is stabilized; calculating Q2 according to Q2= FA/2 rho, and then obtaining the flow value by extraction. The flow is directly reflected by the impact force on the bottom of the U-shaped hard pipe, so that the error caused by energy loss due to mutual conversion of the flow and the pressure in a liquid path is avoided.
Two, the utility model provides a pair of liquid flow detection device, the connecting pipe adopts the hose, and the connecting pipe tip is provided with internal screw thread coupling nut for it is more convenient when establishing ties the liquid way.
Three, the utility model provides a pair of liquid flow detection device, the guide way adopts two for when U type hard tube received fluid impact, it is more steady to remove, makes to measure more accurately.
Four, the utility model provides a pair of liquid flow detection device, casing setting make measuring mechanism encapsulated, prevent that measuring mechanism from being damaged, guarantee measurement accuracy, transparent material can effectively observe simultaneously and look over measuring result.
Drawings
The foregoing and following detailed description of the invention will be apparent when read in conjunction with the following drawings, in which:
fig. 1 is a schematic structural diagram of the present invention;
in the figure: 1. a connecting pipe; 2. a U-shaped hard tube; 3. a guide groove; 4.1, a spring seat; 4.2, a force measuring spring; 4.3, a pointer; 4.4, a graduated scale; 4.5, a stop block; 5. a flange; 6. a housing.
Detailed Description
The technical solution for achieving the objectives of the present invention will be further described by using several specific examples, and it should be noted that the technical solution claimed in the present invention includes, but is not limited to, the following examples.
Example 1
As a most basic embodiment of the present invention, this embodiment discloses a liquid flow detection device, as shown in fig. 1, including connecting pipe 1, U type hard tube 2, guide way 3 and measuring mechanism, 2 both ends of U type hard tube link to each other with connecting pipe 1 respectively, measuring mechanism includes spring holder 4.1, dynamometry spring 4.2, pointer 4.3, scale 4.4 and dog 4.5, connecting pipe 1 end and spring holder 4.1 one end fixed connection are kept away from to U type hard tube 2, and the spring holder 4.1 other end links to each other with dynamometry spring 4.2, be provided with pointer 4.3 on the dynamometry spring 4.2, dynamometry spring 4.2 keeps away from spring holder 4.1 end and links to each other with dog 4.5.
The working principle is as follows: when no liquid flows in the U-shaped hard tube, the force measuring spring is in a free state, and the pointer returns to zero. When the device is connected in series in a pipeline through the connecting hose, the flow of liquid inevitably impacts the bottom of the U-shaped hard pipe, so that the U-shaped hard pipe moves along the guide groove to compress the force measuring spring, and the compression force is inherently and inevitably connected with the flow. According to the impulse theorem of the fluid:
F=ρQ（v1-v2）
in the formula: f, impact force of the liquid on the solid wall; rho-flowThe density of the liquid; q is the flow rate of the liquid; v. of1-flow rate of liquid into the U-shaped rigid tube; v. of2-the flow rate of the liquid exiting the U-channel.
The U pipeline is of equal diameter, the flow area of the U pipeline is A, and according to the continuity principle of fluid flow:
v1=v2=Q/A=V
because v is1、v2Are vectors, equal in magnitude and opposite in direction.
Therefore: f =2 ρ Q V =2 ρ Q2/A
Thus: q2=FA/2ρ
In the formula: f can be displayed by a pointer of the detection mechanism; the density of the rho liquid is determined by the grade of the liquid; the cross-sectional area of the A pipeline is determined by the pipe diameter.
The utility model provides a liquid flow detection device, the preparation work before measuring, look up relevant data and verify the density rho of the liquid that is measured, then return spring pointer 4.3 to zero first, establish ties this device in the liquid way again; the detected liquid flow is totally flowed to the device; reading F after the pointer 4.3 is stabilized; calculating Q2 according to Q2= FA/2 rho, and then obtaining the flow value by extraction. The flow is directly reflected by the impact force on the bottom of the U-shaped hard tube 2, so that the error caused by energy loss due to mutual conversion of the flow and the pressure in a liquid path is avoided.
The connecting pipe 1 adopts a hose, and the end part of the connecting pipe 1 is provided with an internal thread connecting nut, so that the liquid path can be connected in series more conveniently. The guide grooves 3 are two, so that when the U-shaped hard tube 2 is impacted by fluid, the U-shaped hard tube moves more stably, and the measurement is more accurate. The shell 6 is arranged to enable the measuring mechanism to be packaged, the measuring mechanism is prevented from being damaged, measuring precision is guaranteed, and meanwhile the transparent material can effectively observe and check measuring results.
Example 2
As a preferred embodiment of the present invention, this embodiment discloses a liquid flow detection device, as shown in fig. 1, including connecting pipe 1, U type hard tube 2, guide way 3 and measuring mechanism, 2 both ends of U type hard tube link to each other with connecting pipe 1 respectively, measuring mechanism includes spring holder 4.1, dynamometry spring 4.2, pointer 4.3, scale 4.4 and dog 4.5, U type hard tube 2 is kept away from connecting pipe 1 end and spring holder 4.1 one end fixed connection, and the spring holder 4.1 other end links to each other with dynamometry spring 4.2, be provided with pointer 4.3 on the dynamometry spring 4.2, dynamometry spring 4.2 is kept away from spring holder 4.1 end and is linked to each other with dog 4.5.
Preferably, the U-shaped hard pipe 2 is a drift diameter hard pipe.
Preferably, the connecting pipe 1 is a hose.
Preferably, the end of the connecting tube 1 is provided with an internally threaded connecting nut.
Preferably, the connecting pipe 1 is connected with the U-shaped hard pipe 2 through a flange 5.
Preferably, two guide grooves 3 are used.
Preferably, the U-shaped hard tube 2, the guide groove 3 and the detection mechanism are arranged in the shell 6.
Preferably, the housing 6 is a transparent housing 6.
The working principle is as follows: when no liquid flows in the U-shaped hard tube, the force measuring spring is in a free state, and the pointer returns to zero. When the device is connected in series in a pipeline through the connecting hose, the flow of liquid inevitably impacts the bottom of the U-shaped hard pipe, so that the U-shaped hard pipe moves along the guide groove to compress the force measuring spring, and the compression force is inherently and inevitably connected with the flow. According to the impulse theorem of the fluid:
F=ρQ（v1-v2）
in the formula: f, impact force of the liquid on the solid wall; ρ — density of the flowing liquid; q is the flow rate of the liquid; v. of1-flow rate of liquid into the U-shaped rigid tube; v. of2-the flow rate of the liquid exiting the U-channel.
The U pipeline is of equal diameter, the flow area of the U pipeline is A, and according to the continuity principle of fluid flow:
v1=v2=Q/A=V
because v is1、v2Are vectors, equal in magnitude and opposite in direction.
Therefore: f =2 ρ Q V =2 ρ Q2/A
Thus:Q2=FA/2ρ
in the formula: f can be displayed by a pointer of the detection mechanism; the density of the rho liquid is determined by the grade of the liquid; the cross-sectional area of the A pipeline is determined by the pipe diameter.
The utility model provides a liquid flow detection device, the preparation work before measuring, look up relevant data and verify the density rho of the liquid that is measured, then return spring pointer 4.3 to zero first, establish ties this device in the liquid way again; the detected liquid flow is totally flowed to the device; reading F after the pointer 4.3 is stabilized; calculating Q2 according to Q2= FA/2 rho, and then obtaining the flow value by extraction. The flow is directly reflected by the impact force on the bottom of the U-shaped hard tube 2, so that the error caused by energy loss due to mutual conversion of the flow and the pressure in a liquid path is avoided.
The connecting pipe 1 adopts a hose, and the end part of the connecting pipe 1 is provided with an internal thread connecting nut, so that the liquid path can be connected in series more conveniently. The guide grooves 3 are two, so that when the U-shaped hard tube 2 is impacted by fluid, the U-shaped hard tube moves more stably, and the measurement is more accurate. The shell 6 is arranged to enable the measuring mechanism to be packaged, the measuring mechanism is prevented from being damaged, measuring precision is guaranteed, and meanwhile the transparent material can effectively observe and check measuring results.
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 (8)
1. A liquid flow detection device characterized in that: including connecting pipe (1), U type hard tube (2), guide way (3) and measuring mechanism, U type hard tube (2) both ends link to each other with connecting pipe (1) respectively, measuring mechanism includes spring holder (4.1), dynamometry spring (4.2), pointer (4.3), scale (4.4) and dog (4.5), connecting pipe (1) end and spring holder (4.1) one end fixed connection are kept away from in U type hard tube (2), and the spring holder (4.1) other end links to each other with dynamometry spring (4.2), be provided with pointer (4.3) on dynamometry spring (4.2), spring holder (4.1) end is kept away from in dynamometry spring (4.2) and dog (4.5) link to each other.
2. The liquid flow sensing device as defined in claim 1, wherein: the U-shaped hard pipe (2) is a drift diameter hard pipe.
3. The liquid flow sensing device as defined in claim 1, wherein: the connecting pipe (1) adopts a hose.
4. The liquid flow sensing device as defined in claim 1, wherein: the end part of the connecting pipe (1) is provided with a connecting nut with internal threads.
5. The liquid flow sensing device as defined in claim 1, wherein: the connecting pipe (1) is connected with the U-shaped hard pipe (2) through a flange (5).
6. The liquid flow sensing device as defined in claim 1, wherein: the number of the guide grooves (3) is two.
7. The liquid flow sensing device as defined in claim 1, wherein: the U-shaped hard tube (2), the guide groove (3) and the detection mechanism are arranged in the shell (6).
8. The liquid flow sensing device as defined in claim 7, wherein: the shell (6) adopts a transparent shell (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020340621.5U CN211477240U (en) | 2020-03-18 | 2020-03-18 | Liquid flow detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020340621.5U CN211477240U (en) | 2020-03-18 | 2020-03-18 | Liquid flow detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211477240U true CN211477240U (en) | 2020-09-11 |
Family
ID=72360369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020340621.5U Expired - Fee Related CN211477240U (en) | 2020-03-18 | 2020-03-18 | Liquid flow detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211477240U (en) |
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2020
- 2020-03-18 CN CN202020340621.5U patent/CN211477240U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200911 Termination date: 20210318 |