CN221006638U - Fluid pressure measuring device - Google Patents
Fluid pressure measuring device Download PDFInfo
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- CN221006638U CN221006638U CN202322623103.0U CN202322623103U CN221006638U CN 221006638 U CN221006638 U CN 221006638U CN 202322623103 U CN202322623103 U CN 202322623103U CN 221006638 U CN221006638 U CN 221006638U
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- measuring device
- fluid pressure
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- 239000012530 fluid Substances 0.000 title claims abstract description 60
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to the technical field of fluid pressure measurement, in particular to a fluid pressure measuring device. Comprising the following steps: the pressure measuring straight pipe is communicated with a liquid inlet of the tested product; the pressure measuring straight pipe is provided with a pressure measuring section, the pressure measuring section is provided with a double-layer pipeline structure, the double-layer pipeline structure comprises an inner pipe and an outer pipe which are coaxial, the outer pipe is sleeved outside the inner pipe, the inner pipe is provided with an inner hole, and the outer pipe is provided with a pressure measuring hole for connecting a pressure measuring sensor. The fluid pressure measuring device provided by the utility model relieves the problem of measurement errors caused by non-uniformity of flow fields under different flow rates in the existing pressure measuring mode.
Description
Technical Field
The utility model relates to the technical field of fluid pressure measurement, in particular to a fluid pressure measuring device.
Background
The existing pressure measuring mode has the phenomenon of measuring errors caused by the non-uniformity of flow fields under different flow rates. When the flow rate of the liquid is low, or the pipe diameter of the flow pipeline is small, or the density of the liquid is large, the liquid Reynolds number is smaller than 2300 and is in a laminar flow state, the influence of the viscous force is obvious, the influence of the inertial force is small, the liquid gradually decreases to be stable due to the viscous force even if the flow rate disturbance occurs, and at the moment, the medium at each place of the liquid is uniform and has good test environment and conditions. In contrast, when the inertial force of the liquid becomes a main influencing factor, fine flow velocity disturbance also develops and increases into a disturbed irregular flow field.
The existing pressure measuring mode adopts a mode of directly connecting a hose or connecting a round corner elbow, the capability of changing a flow field is basically avoided, and the flow in a pipeline is often accompanied by the problem of uneven flow after fluid is pumped out, namely, the viscosity force and the inertia force are different when the fluid at different positions flows, and meanwhile, the hose also has the problem of reducing the frequency of the pulsating pressure in the fluid in the pipeline.
Disclosure of utility model
The utility model aims to provide a fluid pressure measuring device which is used for solving the problem that the measurement error is caused by the non-uniformity of flow fields under different flow rates in the existing pressure measuring mode.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
A fluid pressure measurement device comprising: the pressure measuring straight pipe is communicated with a liquid inlet of the tested product;
The pressure measuring straight pipe is provided with a pressure measuring section, the pressure measuring section is provided with a double-layer pipeline structure, the double-layer pipeline structure comprises an inner pipe and an outer pipe which are coaxial, the outer pipe is sleeved outside the inner pipe, the inner pipe is provided with an inner hole, and the outer pipe is provided with a pressure measuring hole for connecting a pressure measuring sensor.
Still further, the method comprises the steps of,
The inner tube is provided with a plurality of inner bores along circumference evenly.
Still further, the method comprises the steps of,
The aperture of the inner hole is 2mm.
Still further, the method comprises the steps of,
The pressure measuring holes are arranged in a staggered manner with the inner holes in the circumferential direction.
Still further, the method comprises the steps of,
The axial distance between the pressure measuring hole and the liquid inlet of the product to be measured is 5-10 times the pipe diameter of the pressure measuring straight pipe.
Still further, the method comprises the steps of,
The outer tube is rotationally connected with the inner tube, and when the fluid is liquid, the outer tube rotates until the pressure measuring hole is positioned at the bottom of the pressure measuring straight tube; when the fluid is gas, the outer tube rotates until the pressure tap is positioned at the top of the pressure measuring straight tube.
Still further, the method comprises the steps of,
The pressure measuring straight pipe is characterized by further comprising a bent pipe, wherein the bent pipe is arranged at one end, far away from a liquid inlet of a product to be measured, of the pressure measuring straight pipe through a connecting structure.
Still further, the method comprises the steps of,
The connecting structure comprises a quick-connection buckle, the quick-connection buckle is provided with a first connecting end and a second connecting end which are oppositely arranged, the pressure measuring straight pipe is connected with the first connecting end, and the bent pipe is connected with the second connecting end.
Still further, the method comprises the steps of,
The connecting structure further comprises a gasket, and the gasket is arranged between the first connecting end and the second connecting end.
Still further, the method comprises the steps of,
The pressure measuring sensor is a pressure sensor or a differential pressure sensor.
The utility model has at least the following beneficial effects:
Since the present utility model provides a fluid pressure measuring device, comprising: the pressure measuring straight pipe is communicated with a liquid inlet of the tested product; the pressure measuring straight pipe is provided with a pressure measuring section, the pressure measuring section is provided with a double-layer pipeline structure, the double-layer pipeline structure comprises an inner pipe and an outer pipe which are coaxial, the outer pipe is sleeved outside the inner pipe, the inner pipe is provided with an inner hole, and the outer pipe is provided with a pressure measuring hole for connecting a pressure measuring sensor.
The fluid has inertia and viscosity when flowing, and has the phenomena of flow separation and wall attachment in the section direction of the pressure measuring straight pipe. The separation phenomenon of the fluid directly causes the formation of uneven flow and damage of resistance along the pipeline, and the arrangement of the inner hole and the pressure measuring hole avoids the two conditions to the greatest extent. The fluid flows through the pressure measuring section and is fully mixed into uniform fluid, and the distance between two layers is smaller, so that the phenomenon of flow velocity layering basically does not exist. The double-layer pipeline structure of the pressure measuring section and the inner hole of the inner pipe realize streamline mixing, ensure that fluid is uniformly mixed, no flow velocity layering exists, and prevent pressure distortion caused by flow velocity layering. The pressure measuring hole arranged on the outer tube can be connected with a pressure measuring sensor to serve as a measuring point, so that the fluid pressure can be measured conveniently.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the related art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described, and it is apparent that the drawings in the description below are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of a fluid pressure measuring device according to an embodiment of the present utility model;
FIG. 2 is an enlarged view of a portion of a pressure section provided in an embodiment of the present utility model;
FIG. 3 is a cross-sectional view of a fluid pressure measurement device according to an embodiment of the present utility model;
fig. 4 is a cross-sectional view of a pressure measurement section provided by an embodiment of the present utility model.
Icon:
001-the product to be tested; 100-pressure measuring straight pipes; 110-pressure measuring section; 120-inner tube; 121-an inner hole; 130-an outer tube; 131-measuring pressure holes; 200-bending the pipe; 300-quick-connect buckle; 400-gasket.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Physical quantities in the formulas, unless otherwise noted, are understood to be basic quantities of basic units of the international system of units, or derived quantities derived from the basic quantities by mathematical operations such as multiplication, division, differentiation, or integration.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and features of the embodiments may be combined with each other without conflict. FIG. 1 is a schematic diagram of a fluid pressure measuring device according to an embodiment of the present utility model; FIG. 2 is an enlarged view of a portion of a pressure section provided in an embodiment of the present utility model; FIG. 3 is a cross-sectional view of a fluid pressure measurement device according to an embodiment of the present utility model; fig. 4 is a cross-sectional view of a pressure measurement section provided by an embodiment of the present utility model.
Example 1
The existing pressure measuring mode is a mode of directly connecting a hose or connecting a round corner elbow, the capability of changing a flow field is basically avoided, and the flow in a pipeline is often accompanied by the problem of uneven flow after fluid is pumped out, namely, the viscosity force and the inertia force are different when the fluid at different positions flows, and meanwhile, the hose also has the problem of reducing the frequency of the pulsating pressure in the pipeline.
In view of this, an embodiment of the present utility model provides a fluid pressure measuring device, including: the pressure measuring straight pipe 100, the pressure measuring straight pipe 100 is communicated with a liquid inlet of the tested product 001; the pressure measuring straight pipe 100 is provided with a pressure measuring section 110, the pressure measuring section 110 is provided with a double-layer pipeline structure, the double-layer pipeline structure comprises an inner pipe 120 and an outer pipe 130 which are coaxial, the outer pipe 130 is sleeved outside the inner pipe 120, the inner pipe 120 is provided with an inner hole 121, and the outer pipe 130 is provided with a pressure measuring hole 131 for connecting a pressure measuring sensor.
The fluid has inertia and viscosity when flowing, and has separation and wall attachment phenomena of flowing in the section direction of the pressure measuring straight pipe 100. The segregation of the fluid directly results in uneven flow and damage to the line resistance along the path, and the placement of the bore 121 and the pressure taps 131 avoids both conditions to a maximum extent. The fluid flows through the pressure measuring section 110 and is fully mixed into uniform fluid, and the distance between two layers is smaller, so that the phenomenon of flow rate layering is basically not existed. The double-layer pipeline structure of the pressure measuring section 110 and the inner hole 121 arranged on the inner pipe 120 realize streamline mixing, ensure that fluid is uniformly mixed, no flow velocity layering exists, and prevent pressure distortion caused by flow velocity layering. The pressure measuring hole 131 arranged on the outer tube 130 can be connected with a pressure measuring sensor to serve as a measuring point, so that the fluid pressure can be measured conveniently.
In this embodiment, the pressure measuring straight tube 100 is a rigid straight tube, which can mix fluid in a pipeline uniformly, and is a testing tool with reliable measurement value.
In an alternative manner of the present embodiment, the inner tube 120 is provided with a plurality of inner holes 121 uniformly in the circumferential direction.
Referring to fig. 4, six inner holes 121 are uniformly arranged in the inner tube 120 along the circumferential direction, and the six inner holes 121 are symmetrically arranged to effectively change the flow direction of the streamline into spiral so as to quickly mix the fluid, ensure that the fluid is uniformly mixed, and avoid the pressure distortion phenomenon caused by flow velocity layering. Of course, the number of the inner holes 121 uniformly provided in the circumferential direction of the inner tube 120 may be more or less, as long as the technical purpose of the flow line of the hybrid agitation flow field can be achieved.
Further, the bore diameter of the inner bore 121 is 2mm, which can better mix and agitate the flow field streamline.
In an alternative mode of this embodiment, the pressure taps 131 are arranged offset from the inner bore 121 in the circumferential direction.
Referring to fig. 2, the outer tube 130 is provided with a pressure measuring hole 131 as a sensor measuring point at a middle position of the two inner holes 121, which can facilitate real-time detection of the pressure of the fluid.
In an alternative mode of this embodiment, the axial distance between the pressure measuring hole 131 and the liquid inlet of the product 001 to be measured is 5-10 times the pipe diameter of the pressure measuring straight pipe 100.
Because the streamline of the liquid is a smooth curve, the streamline cannot be turned and cannot be intersected, vortex can be formed at the right-angle turning position of the runner, the length of the pipe diameter which is 5-10 times of the measuring point can stabilize the streamline, the vortex caused by the opening corner can be prevented from causing errors, and the influence of the vortex on the test result is avoided. The axial distance between the pressure measuring hole 131 and the liquid inlet of the product 001 to be measured can be any value between 5 times and 10 times of the pipe diameter of the pressure measuring straight pipe 100.
In an alternative manner of this embodiment, the outer tube 130 is rotatably connected to the inner tube 120, and when the fluid is liquid, the outer tube 130 is rotated until the pressure tap 131 is located at the bottom of the pressure measuring straight tube 100; when the fluid is a gas, the outer tube 130 is rotated until the pressure taps 131 are located at the top of the straight pressure tube 100.
Referring to fig. 1, when the fluid to be measured is a liquid, the pressure measuring hole 131 is located below the pressure measuring straight tube 100, and when the fluid to be measured is a gas, the pressure measuring hole 131 is located above the pressure measuring straight tube 100. The split structure of the outer tube 130 and the inner tube 120 facilitates the rotation adjustment of the position of the pressure measuring point above or below the pressure measuring straight tube 100, and can be changed correspondingly when the medium in the pressure measuring straight tube 100 is liquid or gas, so that the operation is simple and convenient.
In an alternative manner of this embodiment, the fluid pressure measuring device further includes an elbow 200, where the elbow 200 is installed at an end of the pressure measuring straight pipe 100 far away from the liquid inlet of the product 001 to be measured through a connection structure.
Referring to fig. 3 specifically, the rigid bent pipe 200 is connected with the pressure measuring straight pipe 100 through a connection structure, and has the function of enabling the flow lines of the uniformly mixed flow field to be flat and stable again, so that the test result is more accurate and the repeatability is high.
Further, the connection structure includes a quick-connection buckle 300, the quick-connection buckle 300 has a first connection end and a second connection end which are oppositely arranged, the pressure measurement straight pipe 100 is connected with the first connection end, and the bent pipe 200 is connected with the second connection end.
Referring to fig. 3, the quick-connection buckle 300 connects and fixes the pressure measurement straight pipe 100 and the bent pipe 200, so that the quick-connection buckle 300 is convenient to disassemble and assemble, and is of a conventional structure and will not be described herein.
Further, the connection structure further includes a spacer 400, and the spacer 400 is disposed between the first connection end and the second connection end.
With continued reference to fig. 3, the spacer 400 is a silica gel spacer 400, and plays a role in buffering between the pressure measuring straight tube 100 and the bent tube 200.
The rigid bent pipe 200 is connected with the pressure measuring straight pipe 100 through the gasket 400 and the quick-connection buckle 300, so that the streamline of the uniformly mixed flow field tends to be flat and stable again, the test result is more accurate, and the repeatability is high.
The pressure sensor connected to the pressure tap 131 may be a pressure sensor, a differential pressure sensor, or the like. In the present application, referring to fig. 4, the fluid pressure measuring device adopts a six-hole annular pressure measuring mode.
The fluid pressure measuring device meets the requirement of test precision, and reduces test errors as much as possible. After the fluid flow field is analyzed and calculated, the testing error caused by uneven flow field is avoided, and the uneven pressure measurement caused by the layering phenomenon of the fluid is effectively avoided by the fluid pressure measurement mode through the arrangement of the measuring point distance, the pressure measurement port position and the pressure measurement port form.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. A fluid pressure measurement device, comprising: the pressure measuring straight pipe is communicated with a liquid inlet of the tested product;
The pressure measuring straight pipe is provided with a pressure measuring section, the pressure measuring section is provided with a double-layer pipeline structure, the double-layer pipeline structure comprises an inner pipe and an outer pipe which are coaxial, the outer pipe is sleeved outside the inner pipe, the inner pipe is provided with an inner hole, and the outer pipe is provided with a pressure measuring hole for connecting a pressure measuring sensor.
2. A fluid pressure measuring device as claimed in claim 1, wherein,
The inner tube is provided with a plurality of inner bores along circumference evenly.
3. A fluid pressure measuring device as defined in claim 2, wherein,
The aperture of the inner hole is 2mm.
4. A fluid pressure measuring device as defined in claim 2, wherein,
The pressure measuring holes are arranged in a staggered manner with the inner holes in the circumferential direction.
5. A fluid pressure measuring device as claimed in claim 1, wherein,
The axial distance between the pressure measuring hole and the liquid inlet of the product to be measured is 5-10 times the pipe diameter of the pressure measuring straight pipe.
6. A fluid pressure measuring device as claimed in claim 1, wherein,
The outer tube is rotationally connected with the inner tube, and when the fluid is liquid, the outer tube rotates until the pressure measuring hole is positioned at the bottom of the pressure measuring straight tube; when the fluid is gas, the outer tube rotates until the pressure tap is positioned at the top of the pressure measuring straight tube.
7. A fluid pressure measuring device as claimed in any one of claims 1 to 6, wherein,
The pressure measuring straight pipe is characterized by further comprising a bent pipe, wherein the bent pipe is arranged at one end, far away from a liquid inlet of a product to be measured, of the pressure measuring straight pipe through a connecting structure.
8. A fluid pressure measuring device as defined in claim 7, wherein,
The connecting structure comprises a quick-connection buckle, the quick-connection buckle is provided with a first connecting end and a second connecting end which are oppositely arranged, the pressure measuring straight pipe is connected with the first connecting end, and the bent pipe is connected with the second connecting end.
9. A fluid pressure measuring device as defined in claim 8, wherein,
The connecting structure further comprises a gasket, and the gasket is arranged between the first connecting end and the second connecting end.
10. A fluid pressure measuring device as claimed in claim 1, wherein,
The pressure measuring sensor is a pressure sensor or a differential pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322623103.0U CN221006638U (en) | 2023-09-26 | 2023-09-26 | Fluid pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322623103.0U CN221006638U (en) | 2023-09-26 | 2023-09-26 | Fluid pressure measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221006638U true CN221006638U (en) | 2024-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322623103.0U Active CN221006638U (en) | 2023-09-26 | 2023-09-26 | Fluid pressure measuring device |
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| Country | Link |
|---|---|
| CN (1) | CN221006638U (en) |
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2023
- 2023-09-26 CN CN202322623103.0U patent/CN221006638U/en active Active
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