CN104155049A - Apparatus for detecting pressure of fluid in a flexible pipe - Google Patents
Apparatus for detecting pressure of fluid in a flexible pipe Download PDFInfo
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- CN104155049A CN104155049A CN201310180387.9A CN201310180387A CN104155049A CN 104155049 A CN104155049 A CN 104155049A CN 201310180387 A CN201310180387 A CN 201310180387A CN 104155049 A CN104155049 A CN 104155049A
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- flexible pipe
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- compressive plane
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Abstract
The invention discloses an apparatus for detecting the pressure of a fluid in a flexible pipe. A first extruding surface of a pressure plate and a second extruding surface of an upper bracing frame are arranged to be opposite to form a compaction gap. The arrangement of the flexible pipe in the compaction gap can cause extruding deformation to the flexible pipe, so that two plane areas which respectively match the first extruding surface and the second extruding surface are formed. A force measurement plane of a force guide support extends into the compaction gap from a guiding aperture to be in abutted joint with the to-be-tested flexible pipe on a plane area formed on the second extruding surface. A third extruding surface at other end of the force guiding support is in abutted joint with a pressure transducer fixed on a lower bracing frame, so that the fluid pressure in the flexible pipe is conducted to the pressure transducer. Or a force bearing portion used for bearing external forces on the pressure transducer can be enabled to directly extend from the guiding aperture into the compaction gap, so that the force bearing portion can be in abutted joint with the to-be-tested flexible pipe on the matched plane area of the second extruding surface, and thus the influences of stress generated by self-extrusion deformation of the flexible pipe on detection results are eliminated.
Description
Technical field
The application relates to a kind of pick-up unit, especially relates to a kind of device detecting for flexible pipe fluid pressure.
Background technology
In clinical medicine application, often use elastic hose fluid transfer, such as carrying liquid, nutrient solution or blood etc. to human body, or from human body extracting liquid, or from fluid transfer between different device.In above application, need to the hydrodynamic pressure in elastic hose be detected, for overpressure being limited to the scope that equipment sets, if while exceeding setting range, can provide warning message.
Flexible pipe is generally PVC(Polyvinylchloride) or silica gel material, during crimp, flexible pipe two layers of material distortional stress is larger, part as shown in A in Fig. 1, this stress is subject to the factor impacts such as hose materials, environment temperature time, such as temperature is high, material deliquescing, stress can diminish.Existing pressure detection method is when detecting, and the stress that the crimp of elastic hose produces can have influence on testing result, causes pressure detection precision inaccurate.
Summary of the invention
The application provides a kind of device detecting for flexible pipe fluid pressure.
According to the application's first aspect, the application provides a kind of device detecting for flexible pipe fluid pressure, comprising:
Pressing plate, described pressing plate has the first compressive plane;
Upper support frame, described upper support frame one end has the second compressive plane and connects and extend to the pilot hole on the second compressive plane from the upper support frame other end, described the first compressive plane and the second compressive plane are oppositely arranged, be formed for compressing the compression gap of flexible pipe between the two, the distance between described the first compressive plane and the second compressive plane is less than the diameter of flexible pipe to be measured;
Lead power support, one end of the described power of leading support is dynamometry portion, and the other end has the 3rd compressive plane, and the end face of described dynamometry portion is dynamometry plane, described dynamometry portion reaches and compresses gap from described pilot hole, makes dynamometry plane and flexible pipe to be measured be engaged in the plane domain butt on the second compressive plane;
Pressure transducer;
And lower support frame, described pressure transducer is fixed on lower support frame, and described upper support frame and lower support frame are fixedly connected, and described the 3rd compressive plane is pressed on pressure transducer, and flexible pipe fluid pressure is conducted to pressure transducer.
Further, the 50%-70% that the distance between described the first compressive plane and the second compressive plane is hose diameter to be measured.
Further, described dynamometry plane is less than flexible pipe to be measured and is engaged in the plane domain on the second compressive plane.
Further, described dynamometry plane is rectangle.
Further, described rectangular length and width ratio is more than or equal to 2.
Further, the width of described dynamometry plane is less than or equal to the radius of flexible pipe to be measured.
Further, described upper support frame also comprises along the guide pillar or the guide hole that arrange perpendicular to the second compressive plane direction, described in lead corresponding guide hole or the guide pillar being mated that be provided with on power support.
Further, at described upper support frame with lead between power support or lower support frame and leading between power support is provided with for making the 3rd compressive plane prop up the elastic component of pressure transducer, one end of described elastic component and upper support frame or lower support frame butt, the other end with lead power support butt.
Further, described in, lead that power support is structure as a whole or be fixedly connected and form one-piece construction by the part of a plurality of independent processing.
The application also provides a kind of device detecting for flexible pipe fluid pressure, comprising:
Pressing plate, described pressing plate has the first compressive plane;
Upper support frame, described upper support frame one end has the second compressive plane and connects and extend to the pilot hole on the second compressive plane from the upper support frame other end, described the first compressive plane and the second compressive plane are oppositely arranged, be formed for compressing the compression gap of flexible pipe between the two, the distance between described the first compressive plane and the second compressive plane is less than the diameter of flexible pipe to be measured;
Pressure transducer, described pressure transducer comprises for bearing the load portion of external force;
And lower support frame, described pressure transducer is fixed on lower support frame, described upper support frame and lower support frame are fixedly connected, load portion on described pressure transducer reaches and compresses gap in pilot hole, makes load portion and flexible pipe to be measured be engaged in the plane domain butt on the second compressive plane.
Further, the 50%-70% that the distance between described the first compressive plane and the second compressive plane is hose diameter to be measured.
The application's beneficial effect is:
In a kind of scheme providing in the application, the first compressive plane on pressing plate and the second compressive plane on upper support frame are oppositely arranged and form a compression gap, flexible pipe is placed in this compression gap, because the distance between the first compressive plane and the second compressive plane (compressing the width in gap) is less than the diameter of flexible pipe to be measured, therefore can allow flexible pipe produce crimp, thereby form two plane domains that coordinate with the first compressive plane and the second compressive plane respectively, and the dynamometry plane of leading power support extend in compression gap from pilot hole, the plane domain butt forming on the second compressive plane with flexible pipe to be measured, the 3rd compressive plane of leading on the other end of power support is connected on the pressure transducer being fixed on lower support frame, thereby flexible pipe fluid pressure is conducted to pressure transducer.Because flexible pipe in the application is clamped between the first compressive plane and the second compressive plane, the stress Main Function that hose squeezing distortion produces is on the first compressive plane and the second compressive plane, and dynamometry plane only with hose compression distortion after plane domain butt, in this plane domain, there is hardly flexible pipe distortional stress, therefore dynamometry plane can only record flexible pipe fluid pressure, the impact of the stress that the distortion of elimination flexible pipe self extrusion produces on testing result.
In another kind of scheme, also can directly make for bearing the load portion of external force, in pilot hole, to reach compression gap on pressure transducer, thereby make load portion and flexible pipe to be measured be engaged in the plane domain butt on the second compressive plane.In like manner, because flexible pipe in the application is clamped between the first compressive plane and the second compressive plane, the stress Main Function that hose squeezing distortion produces is on the first compressive plane and the second compressive plane, and load portion only with hose compression distortion after plane domain butt, in this plane domain, there is hardly flexible pipe distortional stress, therefore pressure transducer can only record flexible pipe fluid pressure, the impact of the stress that the distortion of elimination flexible pipe self extrusion produces on testing result, and also can simplification device structure in this programme.
Accompanying drawing explanation
Fig. 1 is a kind of hose squeezing distortion schematic diagram;
Fig. 2 is that the application is for the cut-open view of a kind of embodiment of device of flexible pipe fluid pressure detection;
Fig. 3 is the explosive view of the device that detects for flexible pipe fluid pressure shown in Fig. 2.
Embodiment
Below by embodiment, by reference to the accompanying drawings the present invention is described in further detail.
Embodiment mono-:
Please refer to Fig. 2 and 3, the device that should detect for flexible pipe fluid pressure in the present embodiment comprises lower support frame 1, pressure transducer 2, upper support frame 3, leads power support 4 and pressing plate 5.
This pressing plate 5 has the first compressive plane 51, and these upper support frame 3 one end have the second compressive plane 31.On the second compressive plane 31, have from upper support frame 3 other ends and connect and extend to the pilot hole 32 on the second compressive plane 31, and the first compressive plane 51 and the second compressive plane 31 are oppositely arranged, and are formed for compressing the compression gap of flexible pipe between the two.
Flexible pipe 7 to be measured determines by the distance between the first compressive plane 51 of pressing plate 5 and the second compressive plane 31 of upper support frame 3 in the decrement perpendicular in the first compressive plane 51 and the second compressive plane 31 directions, and flexible pipe 7 to be measured is at the first compressive plane 51 be arrangeding in parallel and the second compressive plane 31 direction Free Transforms.For the distance (compressing the width in gap) between the first compressive plane 51 and the second compressive plane 31, it should meet the requirement that is less than flexible pipe 7 diameters to be measured, to make flexible pipe 7 crimps to be measured, forms a certain size plane domain 71 on flexible pipe outside.
And in order to improve tonometric accuracy, can further the distance between the first compressive plane 51 and the second compressive plane 31 be arranged to the 50%-70% of flexible pipe 7 diameters to be measured, that is to say the desirable 30%-50% of decrement of this flexible pipe 7 to be measured.
Pressing plate 5 can be removable fixing with upper support frame 3, and the distance between pressing plate 5 and upper support frame 3 is adjustable, for example, can fix by bolt or screw.Certainly, pressing plate 5 can be to be also fixed on upper support frame 3 miscellaneous part in addition, only need to guarantee that the first compressive plane 51 and the second compressive plane 31 are oppositely arranged, and the width in compression gap meets above-mentioned requirements.
Please continue to refer to Fig. 2 and 3, lead in the present embodiment power support 4 one end (upper end) for dynamometry portion 41, the other end (lower end) has the 3rd compressive plane 43.The end face of this dynamometry portion 41 is dynamometry plane 42, and dynamometry portion 41 reaches and compresses gap from pilot hole 32.This dynamometry plane 42, for being engaged in plane domain 71 butts on the second compressive plane 31 with flexible pipe 7 to be measured, to detect the pressure of soft liquid in pipe, can make dynamometry plane 42 be less than flexible pipe 7 to be measured and be engaged in the plane domain 71 on the second compressive plane 31.The stress Main Function producing due to hose squeezing distortion is on the first compressive plane 51 and the second compressive plane 31, and dynamometry plane 42 only with hose compression distortion after plane domain 71 butts, in this plane domain 71, there is hardly flexible pipe distortional stress, therefore dynamometry plane 42 can only record flexible pipe fluid pressure, and the stress influence that the distortion of elimination flexible pipe self extrusion produces is to the detection of pressure.
The shape of this dynamometry plane 42 can or be similar to rectangle for rectangle, the parameter when area of this dynamometry plane 42 can be as calculation of pressure.Certainly, in other embodiments, rectangle is not the unique selection of dynamometry plane 42, and it can select triangle, circle or polygon etc.Accordingly, the shape of the pilot hole 32 on this second compressive plane 31 and the shape of dynamometry portion 41 are suitable, and this dynamometry portion 41, can be upper mobile perpendicular to the direction (above-below direction in Fig. 2) of the second compressive plane 31 on the interior edge of pilot hole 32 through after pilot hole 32.
And in the present embodiment, take and adopt rectangle as example, this rectangular length and width ratio selectable is selected and is more than or equal to 2, and rectangular length is wide more than two times or two times.Certainly, in other embodiments, improving under the prerequisite of pressure transducer 2 precision, also can make this rectangular length and wide ratio be less than 2, to guarantee the accuracy of measurement.
In order to improve further accuracy of detection, in the present embodiment rectangular width value is set as being less than or equal to half (being radius) of flexible pipe 7 diameters to be measured.Certainly, in other embodiments, this rectangular width value still can be less than half of flexible pipe 7 diameters to be measured (being radius).
Please continue to refer to Fig. 2 and 3, this pressure transducer 2 is fixedly installed with respect to upper support frame 3, and the 3rd compressive plane 43 is connected on pressure transducer 2, and flexible pipe fluid pressure is conducted to pressure transducer 2.
In the present embodiment, pressure transducer 2 is fixed on lower support frame 1, as can be by bonding or be welded and fixed.And upper support frame 3 is fixedly connected with lower support frame 1, particularly, this upper support frame 3 is fixedly connected by screw with lower support frame 1.
In the structure shown in the present embodiment, the pilot hole 32 of leading on power support 4 can lead dynamometry portion 41 in the upper movement of the direction perpendicular to the second compressive plane 31 (above-below direction in Fig. 2).Certainly, in addition still can and lead at upper support frame 3 other guide is set between power support 4, for example in the present embodiment, upper support frame 3 also comprises along the guide pillar 33 arranging perpendicular to the second compressive plane 31 directions, lead the corresponding guide hole 44 being mated that is provided with on power support 4, this guide hole 44 is enclosed within on guide pillar 33, and can be upper mobile in the direction perpendicular to the second compressive plane 31 (above-below direction in Fig. 2), and the quantity of this guide pillar 33 can be one or more.And in other embodiments, guide hole 44 also can exchange with guide pillar 33, guide hole 44 is set on upper support frame 3, and correspondingly guide pillar 33 is set leading on power support 4.
Further, in the present embodiment, at upper support frame 3 with lead between power support 4 and be also provided with elastic component, this elastic component is the spring 6 being set on guide pillar 33, and this spring 6 can promote the 3rd compressive plane 43 and prop up pressure transducer 2.Certainly, as a kind of distortion, also can and lead between power support 4 at lower support frame 1 elastic component is set, this elastic component can pull the 3rd compressive plane 43 to prop up pressure transducer 2.
Being structure as a whole of the power of leading support 4 shown in the present embodiment, and also can on flexible pipe 7 bearing of trends to be measured (being liquid flow direction), split into a plurality of parts by leading power support 4 in other embodiments, the plurality of part interfixes to connect and forms an one-piece construction, so that the processing of each part.
Adopt structure shown in the present embodiment, between the first compressive plane 51 on pressing plate 5 and the second compressive plane 31 on upper support frame 3, be oppositely arranged and form a compression gap, flexible pipe is placed in this compression gap, because the distance (compressing the width in gap) between the first compressive plane 51 and the second compressive plane 31 is less than the diameter of flexible pipe 7 to be measured, therefore can allow flexible pipe produce compression deformation, thereby form two and coordinate plane domain with the first compressive plane 51 and the second compressive plane 31 respectively, and the dynamometry plane 42 of leading power support 4 extend in compression gap from pilot hole 32, the plane domain butt forming on the second compressive plane 31 with flexible pipe 7 to be measured, the 3rd compressive plane 43 of leading on the other end of power support 4 is connected on the pressure transducer 2 being fixedly installed with relative upper support frame 3, thereby flexible pipe fluid pressure is conducted to pressure transducer 2.Because flexible pipe in the application is clamped between the first compressive plane 51 and the second compressive plane 31, the stress Main Function that hose squeezing distortion produces is on the first compressive plane 51 and the second compressive plane 31, and dynamometry plane 42 only with hose compression distortion after plane domain butt, therefore dynamometry plane 42 can only record flexible pipe fluid pressure, and the stress influence that the distortion of elimination flexible pipe self extrusion produces is to the detection of pressure.
Embodiment bis-
The present embodiment two provides the another kind of apparatus structure detecting for flexible pipe fluid pressure, and it is with the difference part of embodiment mono-, cancels and leads power support 4, and directly pressure transducer 2 and flexible pipe butt are detected in the present embodiment two.
The device that should detect for flexible pipe fluid pressure particularly, comprises pressing plate, upper support frame, pressure transducer and lower support frame.
This pressing plate has the first compressive plane, and upper support frame one end has the second compressive plane and connects and extend to the pilot hole on the second compressive plane from the upper support frame other end.The first compressive plane and the second compressive plane are oppositely arranged, be formed for compressing the compression gap of flexible pipe between the two, distance between the first compressive plane and the second compressive plane is less than the diameter of flexible pipe to be measured, to make hose squeezing distortion to be measured, forms a certain size plane domain on flexible pipe outside.
Pressure transducer is fixed on lower support frame, and upper support frame and lower support frame are fixedly connected.This pressure transducer comprises for bearing the load portion of external force, and this load portion reaches and compresses gap in pilot hole, makes load portion and flexible pipe to be measured be engaged in the plane domain butt on the second compressive plane, thus the pressure of detection flexible pipe inner fluid.
This load portion can be plane, its shape can or be similar to rectangle for rectangle, the parameter when area of this load portion can be as calculation of pressure.Certainly, in other embodiments, rectangle is not the unique selection of load portion, and it can select triangle, circle or polygon etc.Accordingly, the shape of the pilot hole on this second compressive plane and the shape of load portion are suitable, and this load portion, through after pilot hole, can move up along the side perpendicular to the second compressive plane in pilot hole.
Take that to adopt rectangle be example, this rectangular length and width ratio selectable is selected and is more than or equal to 2, and rectangular length is wide more than two times or two times.Certainly, in other embodiments, improving under the prerequisite of Pressure Sensor Precision, also can make this rectangular length and wide ratio be less than 2, to guarantee the accuracy of measurement.
In order to improve further accuracy of detection, in the present embodiment rectangular width value is set as being less than or equal to half (being radius) of hose diameter to be measured.Certainly, in other embodiments, this rectangular width value still can be less than half of hose diameter to be measured (being radius).
And about miscellaneous part as the structure of upper support frame, lower support frame and pressing plate and connecting relation each other, still can reference example one described in structure.
In the present embodiment two, because flexible pipe in the application is clamped between the first compressive plane and the second compressive plane, the stress Main Function that hose squeezing distortion produces is on the first compressive plane and the second compressive plane, and load portion only with hose compression distortion after plane domain butt, in this plane domain, there is hardly flexible pipe distortional stress, therefore load portion can only record flexible pipe fluid pressure, the impact of the stress that the distortion of elimination flexible pipe self extrusion produces on testing result.
Above content is in conjunction with concrete embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace.
Claims (10)
1. the device detecting for flexible pipe fluid pressure, is characterized in that, comprising:
Pressing plate, described pressing plate has the first compressive plane;
Upper support frame, described upper support frame one end has the second compressive plane and connects and extend to the pilot hole on the second compressive plane from the upper support frame other end, described the first compressive plane and the second compressive plane are oppositely arranged, be formed for compressing the compression gap of flexible pipe between the two, the distance between described the first compressive plane and the second compressive plane is less than the diameter of flexible pipe to be measured;
Lead power support, one end of the described power of leading support is dynamometry portion, and the other end has the 3rd compressive plane, and the end face of described dynamometry portion is dynamometry plane, described dynamometry portion reaches and compresses gap from described pilot hole, makes dynamometry plane and flexible pipe to be measured be engaged in the plane domain butt on the second compressive plane;
Pressure transducer;
And lower support frame, described pressure transducer is fixed on lower support frame, and described upper support frame and lower support frame are fixedly connected, and described the 3rd compressive plane is pressed on pressure transducer, and flexible pipe fluid pressure is conducted to pressure transducer.
2. the device detecting for flexible pipe fluid pressure as claimed in claim 1, is characterized in that, described dynamometry plane is less than flexible pipe to be measured and is engaged in the plane domain on the second compressive plane.
3. the device detecting for flexible pipe fluid pressure as claimed in claim 2, is characterized in that, described dynamometry plane is rectangle.
4. the device detecting for flexible pipe fluid pressure as claimed in claim 3, is characterized in that, the length and width ratio of described dynamometry plane is more than or equal to 2.
5. the device detecting for flexible pipe fluid pressure as described in claim 3 or 4, is characterized in that, the width of described dynamometry plane is less than or equal to the radius of flexible pipe to be measured.
6. the device detecting for flexible pipe fluid pressure as described in claim 1-5 any one, it is characterized in that, described upper support frame also comprises along the guide pillar or the guide hole that arrange perpendicular to the second compressive plane direction, described in lead corresponding guide hole or the guide pillar being mated that be provided with on power support.
7. the device detecting for flexible pipe fluid pressure as claimed in claim 6, it is characterized in that, at described upper support frame with lead between power support or lower support frame and leading between power support is provided with for making the 3rd compressive plane prop up the elastic component of pressure transducer, one end of described elastic component and upper support frame or lower support frame butt, the other end with lead power support butt.
8. the device detecting for flexible pipe fluid pressure as claimed in claim 7, is characterized in that, described in lead that power support is structure as a whole or be fixedly connected and form one-piece construction by the part of a plurality of independent processing.
9. the device detecting for flexible pipe fluid pressure, is characterized in that, comprising:
Pressing plate, described pressing plate has the first compressive plane;
Upper support frame, described upper support frame one end has the second compressive plane and connects and extend to the pilot hole on the second compressive plane from the upper support frame other end, described the first compressive plane and the second compressive plane are oppositely arranged, be formed for compressing the compression gap of flexible pipe between the two, the distance between described the first compressive plane and the second compressive plane is less than the diameter of flexible pipe to be measured;
Pressure transducer, described pressure transducer comprises for bearing the load portion of external force;
And lower support frame, described pressure transducer is fixed on lower support frame, described upper support frame and lower support frame are fixedly connected, load portion on described pressure transducer reaches and compresses gap in pilot hole, makes load portion and flexible pipe to be measured be engaged in the plane domain butt on the second compressive plane.
10. the device detecting for flexible pipe fluid pressure as described in claim 1 or 9, is characterized in that the 50%-70% that the distance between described the first compressive plane and the second compressive plane is hose diameter to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310180387.9A CN104155049B (en) | 2013-05-15 | 2013-05-15 | Device for the detection of flexible pipe fluid pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310180387.9A CN104155049B (en) | 2013-05-15 | 2013-05-15 | Device for the detection of flexible pipe fluid pressure |
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| CN104155049A true CN104155049A (en) | 2014-11-19 |
| CN104155049B CN104155049B (en) | 2016-12-28 |
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| CN201310180387.9A Active CN104155049B (en) | 2013-05-15 | 2013-05-15 | Device for the detection of flexible pipe fluid pressure |
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Cited By (5)
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| CN105424268A (en) * | 2015-12-15 | 2016-03-23 | 深圳市深科医疗器械技术开发有限公司 | Pressure detection device for fluid in hose |
| CN105910748A (en) * | 2016-06-28 | 2016-08-31 | 新疆水利水电科学研究院 | Device for measuring pressure of drip irrigation belt |
| CN107063549A (en) * | 2017-06-07 | 2017-08-18 | 利穗科技(苏州)有限公司 | Non-intrusion type flexible pipe fluid pressure sensor |
| CN107131980A (en) * | 2017-06-09 | 2017-09-05 | 上海交通大学 | The direct stress that a kind of small rotary tank prepares mud-rock flow determines device |
| WO2022179625A1 (en) * | 2021-02-26 | 2022-09-01 | 广东利元亨智能装备股份有限公司 | Pressure detection assembly and ultrasonic welding device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107063549A (en) * | 2017-06-07 | 2017-08-18 | 利穗科技(苏州)有限公司 | Non-intrusion type flexible pipe fluid pressure sensor |
| CN107131980A (en) * | 2017-06-09 | 2017-09-05 | 上海交通大学 | The direct stress that a kind of small rotary tank prepares mud-rock flow determines device |
| WO2022179625A1 (en) * | 2021-02-26 | 2022-09-01 | 广东利元亨智能装备股份有限公司 | Pressure detection assembly and ultrasonic welding device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104155049B (en) | 2016-12-28 |
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