CN114910210A - Pressure measuring device for measuring fluid medium pressure and pressure transmitter - Google Patents
Pressure measuring device for measuring fluid medium pressure and pressure transmitter Download PDFInfo
- Publication number
- CN114910210A CN114910210A CN202110169269.2A CN202110169269A CN114910210A CN 114910210 A CN114910210 A CN 114910210A CN 202110169269 A CN202110169269 A CN 202110169269A CN 114910210 A CN114910210 A CN 114910210A
- Authority
- CN
- China
- Prior art keywords
- pressure
- fluid medium
- measuring device
- measuring
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 86
- 239000002184 metal Substances 0.000 claims abstract description 80
- 229910052751 metal Inorganic materials 0.000 claims abstract description 80
- 239000007788 liquid Substances 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 15
- 239000012528 membrane Substances 0.000 claims description 9
- 238000009530 blood pressure measurement Methods 0.000 abstract description 14
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000002775 capsule Substances 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
- G01L7/08—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
- G01L7/10—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the capsule type
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
A pressure measurement device and pressure transmitter for measuring the pressure of a fluid medium, the pressure measurement device comprising: a base; the metal diaphragm is arranged on the base and used for sensing the pressure of a fluid medium to be detected, and a pressure guide cavity is formed between the metal diaphragm and the base; the vibration device is used for forming a vibration field, so that the fluid medium to be detected can continuously vibrate and can be prevented from being sticky, the pressure measuring device is protected from being influenced, the pressure measuring device can be ensured to normally work under the working conditions that the fluid medium to be detected is sticky and easy to crystallize, and the service life is prolonged.
Description
Technical Field
The invention relates to a pressure measuring device and a pressure transmitter for measuring the pressure of a fluid medium.
Background
The pressure measuring device is a detecting device which can sense measured information, such as pressure, temperature, liquid level and the like, and convert the sensed information into electric signals according to a certain rule so as to meet the requirements of information transmission, processing, display, recording, control and the like. The pressure measuring device is generally composed of a sensing element and a conversion element, and is not used for converting electricity into electricity. Pressure measurement devices have been widely used in the fields of industrial automation, aerospace, automotive electronics, biomedicine, consumer electronics, and the like, as key devices for obtaining information. With the continuous development of fields such as unmanned aerial vehicles/robots, automatic driving, industrial 4.0, wearable equipment, artificial intelligence, 5G and the like in the future, the demands on various pressure measurement devices are also continuously increased.
At present, in the field of industrial fluid measurement, a flange diaphragm box type remote transmission pressure transmitter is mostly adopted as a detection device for measuring pressure or liquid level. The flange bellows is divided into a flush type and a convex type inserting barrel. Conventional fluid media are flange-tested using a flush membrane process, and when viscous or crystalline media are encountered, they need to be measured using a flange capsule with an insert cartridge. Viscous media, particularly those which are easily crystallized, tend to adhere to the capsule as the time of use increases, affecting the elasticity of the capsule, and further affecting the performance, even destroying the capsule.
The pressure measurement adopts the metal diaphragm sensing fluid medium's that awaits measuring pressure, through metal diaphragm sensing pressure, produce deformation, and then the pressure conduction that will gather to the control unit, carry out the conversion of pressure signal and signal of telecommunication, and when measuring fluid medium's pressure, some fluid medium are easily become viscous state or take place the crystallization because the nature reason of medium itself, along with the increase of live time, the fluid medium that awaits measuring can bond, attach to the metal diaphragm, influence the diaphragm elasticity, destroy pressure measurement device's performance and reduce pressure measurement device's life. Therefore, the pressure measuring device and the pressure transmitter for measuring the pressure of the fluid medium provided by the invention aim to solve various problems in the prior art.
Disclosure of Invention
In view of the above technical problems, the present invention aims to provide a pressure measuring device for measuring the pressure of a fluid medium. By arranging the vibration device at the base of the pressure measuring device, a vibration field is formed near the metal diaphragm, and the fluid medium to be measured is prevented from crystallizing.
Therefore, according to a first aspect of the present invention, a pressure measuring device for measuring a fluid medium pressure is proposed, characterized in that the pressure measuring device for measuring a fluid medium pressure comprises:
a base;
the metal diaphragm is arranged on the base and used for sensing the pressure of a fluid medium to be detected, and a pressure guide cavity is formed between the metal diaphragm and the base;
a pressure pipe communicated with the pressure guide cavity for conducting the pressure of the fluid medium to be measured sensed by the metal diaphragm, an
And the vibration device can enable the fluid medium to be measured near the metal diaphragm to be in a vibration state.
According to some embodiments of the first aspect of the present invention, the vibration device comprises:
the ultrasonic vibrator is arranged on the side face, back to the metal diaphragm, of the base. After the ultrasonic vibrator is electrified, vibration is generated at the base to form a vibration field, so that the fluid medium to be detected is prevented from crystallizing.
According to some embodiments of the first aspect of the present invention, the ultrasonic vibrator is connected to a connection terminal through a transmission line, and an external circuit that supplies power and/or a control signal to the ultrasonic vibrator is connected to the connection terminal.
According to some embodiments of the first aspect of the present invention, the number of the ultrasonic vibrators is provided in plural, and the plural ultrasonic vibrators are arranged uniformly around the metal diaphragm. Through the reasonable arrangement mode of the ultrasonic vibrators, the crystallization problem of the medium to be measured can be crystallized efficiently and reliably, and the accuracy of measured data is improved.
According to some embodiments of the first aspect of the present invention, the base is provided with a first mounting hole for mounting an ultrasonic vibrator, and the ultrasonic vibrator is embedded in the base through the first mounting hole.
According to some embodiments of the first aspect of the present invention, a side of the base facing the metal diaphragm is configured with a corrugated structure.
According to some embodiments of the first aspect of the present invention, a first through hole is provided in the base, and the pressure guide pipe communicates with the pressure guide cavity through the first through hole.
According to some embodiments of the first aspect of the present invention, the impulse pipe is configured as a capillary.
According to some embodiments of the first aspect of the present invention, the pressure guiding tube and the pressure guiding cavity are filled with an inflation liquid for conducting pressure.
According to some embodiments of the first aspect of the present invention, the side surface of the metal diaphragm is configured with an annular corrugated structure, and the annular corrugated structure helps to stabilize the pressure of the fluid to be measured and increase the contact area with the fluid to be measured, so as to facilitate more accurate pressure collection of the fluid medium to be measured.
According to some embodiments of the first aspect of the present invention, the metal diaphragm is elastically deformed according to a sensed pressure of a fluid medium to be measured, and after the metal diaphragm is elastically deformed, the pressure is conducted to the signal conversion unit by using a pressure guide cavity formed between the metal diaphragm and the base and a filling liquid in a pressure guide pipe communicated with the pressure guide cavity.
According to some embodiments of the first aspect of the present invention, the pressure measurement device for measuring fluid medium pressure further comprises a flange for fixing the pressure measurement device.
According to some embodiments of the first aspect of the present invention, the pressure measuring device for measuring the pressure of the fluid medium further comprises a cylinder, and two ends of the cylinder are respectively connected to the base and the flange.
According to some embodiments of the first aspect of the present invention, the base, the cylinder and the flange form a housing of a pressure measuring device for measuring the pressure of the fluid medium, the vibration device being accommodated in the housing, the housing serving as a support protection for the entire pressure measuring device.
According to some embodiments of the first aspect of the present invention, the flange has disposed thereon:
a second through hole; and
a fixing sleeve used for fixing the pressure guide pipe,
the pressure guide pipe penetrates through the second through hole and the fixing sleeve to be fixed on the flange.
According to some embodiments of the first aspect of the present invention, the flange is provided with a second mounting hole for mounting a terminal, and the terminal is fixed to the flange through the second mounting hole. The connection terminal is fixed to the flange and connected to an external circuit to supply power to the ultrasonic vibrator and/or provide a control signal.
According to some embodiments of the second aspect of the invention, the invention provides a pressure transmitter comprising a pressure measurement device as described above for measuring a pressure of a fluid medium. And after the pressure measuring device collects the pressure signal, the pressure signal is transmitted to a signal conversion unit of the pressure transmitter and converted into an electric signal to be output. Through the vibration device in the pressure measuring device of the pressure transmitter, a vibration field can be generated at the metal diaphragm, and the fluid medium to be measured can be prevented from being bonded or crystallized, so that the measurement accuracy of the pressure transmitter is improved, and the service life of the pressure transmitter is prolonged.
Drawings
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and examples. In the drawings, like reference numerals are used to refer to like parts unless otherwise specified. Wherein:
FIG. 1 is a schematic block diagram of an embodiment according to the present invention;
list of reference numbers:
1. flange
2. Barrel body
3. Ultrasonic vibrator
4. Base seat
5. Filling liquid
6. Metal diaphragm
7. Pressure guide cavity
8. Transmission line
9. Wiring terminal
10. Pressure guiding pipe
11. Fixing sleeve
12. First through hole
13. Second through hole
14. First mounting hole
15. Second mounting hole
Detailed Description
The technical solutions of the embodiments of the present invention will be described below with reference to the accompanying drawings. It is clear that the described embodiments relate only to a few embodiments of the invention, not to all embodiments. All other embodiments, which can be derived by a person skilled in the art from the disclosed embodiments without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," "third," and the like in the description and in the claims of this application are used for distinguishing between different elements and not for describing a particular sequential order. Furthermore, the terms "comprising" and "having," as well as any variant thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. It will be understood by those skilled in the art that throughout the present specification and claims, certain terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, may be used in a variety of orientations and positional relationships indicated in the drawings, which are used for convenience in describing the invention and to simplify the description, and which do not represent or imply that the referenced device, mechanism, structure, or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, the above terms should not be construed as limiting the present invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one implementation of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Fig. 1 is a schematic structural diagram according to an embodiment of the present invention. In the embodiment shown in fig. 1, the pressure measuring device for measuring the pressure of the fluid medium comprises a base 4, a metal diaphragm 6 for sensing the pressure of the fluid medium to be measured is arranged on the base 4, a pressure conducting cavity 7 is formed between the metal diaphragm 6 and the base 4, and the pressure conducting cavity 7 is used for conducting the pressure generated after the metal diaphragm 6 is deformed due to compression. The pressure measuring device further comprises a pressure guide pipe 10 and a vibration device capable of enabling the fluid medium to be measured nearby the metal diaphragm 6 to be in a vibration state, wherein the pressure guide pipe 10 is communicated with the pressure guide cavity 7 and used for conducting the pressure of the fluid medium to be measured sensed by the metal diaphragm 6, and the vibration device can form a vibration field nearby the metal diaphragm 6 and prevent the fluid medium to be measured from being attached or bonded to the metal diaphragm 6.
The pressure measuring device for measuring the pressure of the fluid medium shown in fig. 1 operates on the principle that the metal diaphragm 6 senses the pressure of the fluid medium to be measured, and the metal diaphragm 6 deforms after receiving the pressure of the fluid medium to be measured. A pressure guide cavity 7 is formed between the metal diaphragm 6 and the base 4, the pressure guide pipe 10 is communicated with the pressure guide cavity 7, filling liquid 5 for conducting pressure is filled in the pressure guide cavity 7 and the pressure guide pipe 10 of the pressure measuring device, the filling liquid 5 transmits the pressure generated after the metal diaphragm 6 is deformed to a signal conversion unit of the pressure transmitter, and through signal conversion, a pressure signal of a fluid medium to be measured, which is sensed by the metal diaphragm 6, is converted into an electric signal to obtain the pressure value of the fluid medium to be measured. Such a pressure measuring device is designed, for example, as a pressure measuring capsule, in particular as an insertion pressure measuring capsule.
Be provided with vibrating device on pressure measuring device's base 4, including ultrasonic vibrator 3 in the vibrating device, ultrasonic vibrator 3 passes through transmission line 8 and binding post 9 and connects external control circuit, external control circuit supplies power and/or provides control signal for ultrasonic vibrator 3 forms the vibration field near metal diaphragm 6, prevents that the fluid medium that awaits measuring from producing and glues thick or the crystallization, damages metal diaphragm 6. The formed vibration field can effectively prevent the metal diaphragm 6 from being damaged, thereby protecting the pressure measuring device, and improving the reliability and the service life of the pressure measuring device.
Here, the ultrasonic vibrator 3 may adopt different operation modes under the control of the control circuit, such as vibration while the pressure measuring device collects pressure, or vibration at periodic intervals, and other vibration modes matching the operation condition of the pressure measuring device.
As shown in fig. 1, the vibration device includes at least one ultrasonic vibrator 3, and the ultrasonic vibrator 3 is disposed on a side of the base 4 facing away from the metal diaphragm 6. In other words, the metal diaphragm 6 is provided on one side of the base 4, and the ultrasonic vibrator 3 is provided on the opposite side. Here, the metal diaphragm 6 is arranged on the outer side of the base 4 facing the medium to be measured and thus better contacts the medium to be measured and senses the pressure, while the ultrasonic vibrator 3 is arranged on the inner side of the base 4 facing away from the metal diaphragm 6, thereby better generating and transmitting vibrations while being mechanically protected.
In the embodiment shown in fig. 1, two ultrasonic vibrators 3 are exemplarily included, the two ultrasonic vibrators 3 are symmetrically installed centering on the center of the side of the base 4, the ultrasonic vibrators 3 are connected to a connection terminal 9 through a transmission line 8, and an external circuit for supplying power and/or a control signal to the ultrasonic vibrators 3 is connected through the connection terminal 9. Here, the external circuit may include a power supply circuit for supplying power to the ultrasonic vibrator 3 and a control circuit for controlling the ultrasonic vibrator 3.
It is worth mentioning that the two ultrasonic vibrators 3 may be symmetrically arranged with respect to the geometric center of the base 4. For example, for a disc-shaped base 4, the ultrasonic oscillators 3 may be arranged radially and symmetrically with respect to the center of the base 4, that is, two ultrasonic oscillators 3 are located at the top and bottom of the base 4, respectively, and have equal distances to the center of the circle, and are arranged symmetrically with respect to the center of the circle, so as to provide a vibration field for the metal diaphragm 6 on the base 4. However, in some industrial or production applications, the above-mentioned symmetrical arrangement may not be necessary, for example, two ultrasonic vibrators 3 may not be necessarily arranged symmetrically around the center of the base 4, but the ultrasonic vibrators 3 may be provided in plural according to actual needs, and the arrangement may be appropriately selected in accordance with the number and positions of the ultrasonic vibrators 3 while ensuring that the ultrasonic vibrators 3 can form a vibration field in the vicinity of the metal diaphragm 6.
It should be noted that, in practical industrial or production applications, in the working process of the pressure measuring device, the vibrating device is provided with two or more ultrasonic vibrators 3 to play a role of redundancy backup, and if one of the ultrasonic vibrators 3 is damaged, the other ultrasonic vibrator 3 can continue to work to ensure the operation of the device. It is of course also conceivable to provide any number of ultrasonic vibrators 3 to prevent the complete apparatus from stopping when one or more of the ultrasonic vibrators 3 are damaged.
In the pressure measuring device for measuring the pressure of a fluid medium shown in fig. 1, a first mounting hole 14 for mounting an ultrasonic vibrator 3 is provided in a base 4, and the ultrasonic vibrator 3 is inserted into the base 4 through the first mounting hole 14. In the embodiment shown in fig. 1, only two first mounting holes 14 are shown in the base 4, and other mounting arrangements that satisfy the conditions are equally applicable to the present invention. If the internal structure of the first mounting hole 14 is properly arranged in the same first mounting hole 14, and a suitable connection manner is selected, one ultrasonic vibrator 3 may be inserted into the first mounting hole 14 connected to the base 4 by a connecting member such as a bolt, a nut, or the like, or two or more ultrasonic vibrators 3 may be inserted into the same first mounting hole 14. In order to facilitate operations such as manufacturing, assembly, and maintenance, the number of the ultrasonic oscillators 3 may be the same as the number of the first mounting holes 14, that is, each ultrasonic oscillator 3 is fitted into the first mounting hole 14 uniquely corresponding thereto, or the number of the ultrasonic oscillators 3 may be larger than the number of the first mounting holes 14, that is, a plurality of ultrasonic oscillators 3 are fitted into the same first mounting hole 14. Under the condition that the ultrasonic vibrators 3 are reasonably arranged and a vibration field can be provided for the pressure measuring device, the connection mode and the corresponding relation of the ultrasonic vibrators 3 and the first mounting holes 14 can be reasonably selected and distributed according to actual work, production application and the like.
In the pressure measuring device for measuring the pressure of a fluid medium shown in fig. 1, the side of the base 4 facing the metal diaphragm 6 is formed with a corrugated structure. In this embodiment, the corrugations are configured, for example, as a plurality of concentric rings of increasing diameter centered on the geometric center of the side of the base 4, and the corrugations are distributed continuously in the radial direction of the side of the base 4. Here, the wave crests and wave troughs of the corrugated structure can be adjusted as required, so that a good pressure guiding effect of the pressure measuring device is realized in combination with the specific structural form of the metal diaphragm 6 on the base 4. The side surface of the base 4 facing the metal membrane 6 can also be considered to be arranged to be a sawtooth structure, and the tooth shape and the tooth pitch of the sawtooth structure can be adjusted as required, so that the specific structural form of the metal membrane 6 on the base 4 is combined, and the good pressure guiding effect of the pressure measuring device is realized. Therefore, the side surface of the base 4 facing the metal membrane 6 is provided with a wave-shaped structure such as a U shape, a V shape and the like, so that the requirement of pressure conduction can be met, and a good pressure guiding effect of the pressure measuring device is realized.
In the pressure measuring device for measuring the pressure of a fluid medium shown in fig. 1, a first through hole 12 is provided on the base 4, the pressure guiding pipe 10 passes through the first through hole 12 at one end to communicate with the pressure guiding cavity 7 formed between the metal diaphragm 6 and the base 4, and the other end is led to a signal conversion unit. In the embodiment shown in fig. 1, the first through hole 12 is disposed in a cross-sectional circle center of the base 4, and the pressure guide pipe 10 passes through the circle center and communicates with the pressure guide chamber 7. It should be noted that the arrangement of the first through holes 12 is not limited to the cross-sectional center of the base 4, and any other layout that satisfies the condition and enables the pressure guiding pipe 10 to communicate with the pressure guiding chamber 7 may be selected. It should be noted that the first through hole 12 may have a circular, oval, square or other suitable cross-sectional shape to facilitate manufacturing, transportation, installation, maintenance, etc., but the present invention also allows the first through hole 12 to be configured in a more complex structure to sufficiently meet various application requirements.
In the pressure measuring device for measuring the pressure of a fluid medium, as shown in fig. 1, the pressure lines 10 are designed as capillary tubes. The invention can select the capillary tubes with different lengths and tube diameters according to different working conditions, and meets the corresponding pressure conduction requirements.
In the pressure measuring device for measuring the pressure of the fluid medium shown in fig. 1, a pressure guide cavity 7 formed between the metal diaphragm 6 and the base 4 and a pressure guide pipe 10 communicated with the pressure guide cavity 7 are filled with filling liquid 5. The metal diaphragm 6 of the pressure measuring device is in contact with a fluid medium to be measured to generate elastic deformation, and the filling liquid 5 is pushed to move in a pressure guide cavity 7 formed between the metal diaphragm 6 and the base 4 and a pressure guide pipe 10 communicated with the pressure guide cavity 7, so that pressure is transmitted to the signal conversion unit from the metal diaphragm 6 through the pressure guide cavity 7 and the pressure guide pipe 10, and the signal conversion unit converts a received pressure signal into an electric signal.
In this embodiment, the selected filling liquid 5 is silicone oil, it should be noted that the filling liquid 5 of the present invention is not limited to silicone oil, and other filling liquids 5 capable of conducting pressure may be selected and used as well, such as glycerin, liquid metal gallium, and the like, and the above materials all belong to pressure-transmitting liquids which have stable properties and meet the requirements of safety and environmental protection, so that safety and reliability in measurement environment and operation can be ensured. In the invention, the pressure guide cavity 7 and the pressure guide pipe 10 are selected to be filled with the filling liquid 5. According to other embodiments, other materials capable of conducting pressure, such as gas, liquid, etc., can be used as the filling materials in the pressure guide cavity 7 and the pressure guide tube 10 of the present invention, and the materials can be selected to be suitable for filling according to practical production applications under the condition that the pressure guide cavity 7, the pressure guide tube 10 and the internal filling materials can stably conduct pressure.
In the embodiment shown in fig. 1, the metal diaphragm 6 is an elastic diaphragm provided as an elastic sensitive element, for example, in the shape of a circular membrane. The side surface of the metal diaphragm 6 is provided with a corrugated structure, when two surfaces of the metal diaphragm 6 are acted by different pressures, the metal diaphragm 6 moves towards the surface with lower pressure in a strain mode, and the center of the metal diaphragm generates displacement with a certain relation formed by pressure difference. The corrugated structure of the metal membrane 6 is provided with a plurality of concentric rings with gradually increasing diameters by taking the geometric center of the metal membrane 6 as the center of a circle, and the corrugations are continuously distributed along the diameter direction of the metal membrane 6. Herein, the wave crest and the wave trough of ripple can be adjusted as required to can increase the area of contact with the fluid medium that awaits measuring, realize the better sensing effect of pressure measuring device.
The metal diaphragm 6 can also be considered to be arranged into a sawtooth structure, and the tooth shape and the tooth pitch of the sawtooth structure can be adjusted according to needs, so that the contact area with a fluid medium to be measured can be increased, and the better pressure sensing effect of the pressure measuring device is realized. Therefore, the metal diaphragm 6 is arranged into a wave-shaped structure such as a "U" shape, a "V" shape, and the like, and can meet the requirement of sensing pressure, and a good sensing effect of the pressure measuring device is realized. It should be noted that, in the embodiment shown in fig. 1, the structure of the metal diaphragm 6 corresponds to the structure of the side surface of the base 4 facing the metal diaphragm 6, and under the condition that the two structures correspond to each other, the metal diaphragm 6 is deformed, which helps the collected pressure to be conducted through the pressure guiding cavity 7 and the pressure guiding pipe 10 quickly and accurately.
As shown in fig. 1, the pressure measuring device for measuring the pressure of the fluid medium further comprises a flange 1 for fixing the pressure measuring device and a cylinder 2 with two ends respectively connected with the base 4 and the flange 1. In this embodiment, one end of the flange 1 is connected to the cylinder 2 by screw fastening, and the other end is connected to the signal conversion unit and the external control circuit by screw fastening. The cylinder 2 may provide support and protection for the ultrasonic vibrator 3 and the transmission line 8. In the case of a cylindrical barrel 2, the barrel 2 is connected at one end to a base 4 by means of a screw fastening and at the other end to a flange 1 by means of a screw fastening, the base 4 and the flange 1 forming the circular top and bottom surfaces of the barrel 2, respectively. The base 4, the cylinder 2 and the flange 1 form a shell of a pressure measuring device for measuring the pressure of a fluid medium, the ultrasonic vibrator 3 and the transmission line 8 in the vibration device are accommodated in the shell, and the formed shell can strengthen the mechanical strength of the pressure measuring device and protect electronic components inside the shell from being damaged by external physical impact on one hand, and can protect pressure conducting paths and transmission modes from being influenced by the structure of the shell on the other hand, so that the stability of pressure measurement and the data reliability are remarkably improved.
In the embodiment shown in fig. 1, the flange 1 is provided with a second through hole 13, and the second through hole 13 is arranged to enable the pressure pipe 10 to pass through the flange 1 and be connected with a signal conversion unit, so that one end of the pressure pipe 10 close to the flange 1 is fixed at the flange 1, the device is more stable, and the reliability of the device is enhanced.
The flange 1 is further provided with a fixing sleeve 11 for fixing a pressure guide pipe 10, the fixing sleeve 11 is fixed on the flange 1 in a threaded fastening mode, one end of the pressure guide pipe 10 is communicated with a pressure guide cavity 7 formed between the metal diaphragm 6 and the base 4 through a first through hole 12, and the other end of the pressure guide pipe penetrates through a second through hole 13 and the fixing sleeve 11 to be fixed on the flange 1 and is continuously connected to a signal conversion unit.
In the embodiment, the second through hole 13 and the fixing sleeve 11 are located at the center of the flange 1, and the pressure pipe 10 firstly passes through the second through hole 13 and then passes through the fixing sleeve 11, that is, the fixing sleeve 11 is disposed on the outer side surface of the flange 1. It should be noted that the second through hole 13 and the fixing sleeve 11 are arranged to mechanically fix the pressure pipe 10 so that it can conduct pressure and connect with the signal conversion unit, so that the arrangement mode meeting the requirement can be selected in the present invention, for example, the fixing sleeve 11 is located on the inner side surface of the flange 1, that is, the pressure pipe 10 passes through the fixing sleeve 11 first and then passes through the second through hole 13, which can also achieve the arrangement mode of fixing the pressure pipe 10.
It should be noted that the arrangement of the second through holes 13 is not limited to the center of the flange 1, and any other layout that satisfies the condition and enables the pressure pipe 10 to be fixed by the second through holes 13 on the flange 1 and the fixing sleeve 11 may be selected. It should be noted that the cross-sectional shape of the second through hole 13 may be circular, oval, square or other suitable shapes. The cross-sectional shape of the fixing sleeve 11 for fixing the pressure pipe 10 may be circular, oval, square or other suitable shapes, so as to facilitate manufacturing, transportation, installation, maintenance and the like. Of course, the invention also allows the second through-hole 13 and the fixing sleeve 11 to be constructed in a more complex manner, so as to be able to adequately meet the requirements of various applications.
In the embodiment shown in fig. 1, the flange 1 is provided with a second mounting hole 15 for mounting the connection terminal 9, in this embodiment, one second mounting hole 15 is provided, the connection terminal 9 is fixed to the flange 1 through the second mounting hole 15, and the connection terminal 9 is externally connected to a power supply line for supplying power to the ultrasonic vibrator 3 and/or providing a control signal.
It should be noted that, in actual work or production application, two second mounting holes 15 may be provided on the flange 1 of the pressure measuring device, and two connection terminals 9 are provided at the same time, the two connection terminals 9 are mounted and fixed on the flange 1 through the two second mounting holes 15, and the two connection terminals 9 may play a role of mutual redundancy backup, if one of the connection terminals 9 is damaged, the other connection terminal 9 may continue to work, and the operation of the device is ensured. Of course, it is also conceivable to provide any desired number of connection terminals 9, so that a complete device is prevented from being deactivated if one or more of the connection terminals 9 is damaged.
In some embodiments, the connection terminals 9 and the external power line may be two or more, and the external power may control the two connection terminals 9 to transmit signals through the signal transmission line 8, so as to backup the signals and reduce the risk of stopping the device.
It is worth noting that the transmission mode of the signal can be set as wireless transmission, or the wireless transmission and the wired transmission are combined to be deployed, so that the stability and the accuracy of the signal transmission are enhanced, the transmission signal is prevented from being lost, the normal work of the device is prevented from being influenced, and the reliability of the pressure measuring device is improved.
Note that, in the embodiment shown in fig. 1, an external power supply may supply a 24V dc power to the ultrasonic vibrator 3 through the connection terminal 9. However, the power supply is not limited to a 24V dc power supply, and other power supply modes satisfying the requirements for providing a stable power supply may be selected in operation or production applications.
When the power supply is switched on, the ultrasonic vibrator 3 vibrates to form a vibration field at the metal diaphragm 6, so that the fluid medium to be measured is not easy to attach or adhere to the surface of the metal diaphragm 6, the surface of the metal diaphragm 6 contacting the fluid medium to be measured is not affected by the fluid medium to be measured, and the reliability and the service life of the whole pressure measuring device are improved.
In the pressure measuring device for measuring the pressure of the fluid medium shown in fig. 1, the pressure is transmitted through the pressure guide cavity 7 and the pressure guide pipe 10 at the position P in fig. 1, and the pressure guide pipe 10 at the position P in fig. 1 is connected with a signal conversion unit, that is, the pressure signals transmitted by the pressure guide cavity 7 and the pressure guide pipe 10 are converted into electric signals.
It should be noted that the above is only an exemplary illustration of the present invention based on the embodiment illustrated in fig. 1, but it should be understood that the present invention can be flexibly designed, modified or adjusted according to the actual application requirements without departing from the gist of the present invention.
It should be noted that the barrel 2 of the present invention protects the components inside the barrel 2, and the barrel 2 can also provide a supporting function for the vibration device, so that the overall structure is more compact and reliable. In practice, the barrel 2 may be constructed in any suitable shape. One end of the cylinder 2 is connected with the base 4, the other end of the cylinder is connected with the flange 1, if the cylinder 2 is set to be a cylindrical cylinder, the base 4 and the flange 1 respectively form the circular top surface and the bottom surface of the cylinder 2, and the cylinder 2, the base 4 and the flange 1 can be connected together by using any feasible connection modes such as welding, riveting and screwing, so that an integrated integral structure is formed.
It should be noted that, in the housing composed of the base 4, the cylinder 2 and the flange 1, the cross-sectional shapes of the base 4, the cylinder 2 and the flange 1 may be circular, oval, square or other suitable shapes, so as to facilitate the manufacturing, transportation, installation, maintenance and the like.
In the pressure measuring device for measuring the fluid medium to be measured, the material of the structural component contacting the external environment is not limited to a metal material, and other materials with the same effect and better corrosion resistance can be selected. The structural connection mode involved in the pressure measuring device is not limited to welding and other connection modes for improving the compressive strength can be adopted.
It should be understood that the first through hole 12 and the second through hole 13 mentioned in the present invention fully allow flexible arrangement, selection or adjustment according to the actual application requirements for specific arrangement number, arrangement position, structural size and the like of such holes. Thereby facilitating manufacturing, transportation, installation, maintenance, and the like. Of course, the invention also allows the holes to be constructed in a more complex manner in order to be able to adequately meet the requirements of various applications.
Of course, it should be noted that, in some embodiments according to the present invention, the base 4 or the flange 1 may be integrally formed with the first through hole 12 or the second through hole 13 disposed thereon by a processing process such as casting, machining, and the like, so as to improve the reliability and the service life of the device.
According to another aspect of the present invention, a pressure transmitter is provided, which comprises a pressure measuring device as described above for measuring the pressure of a fluid medium, wherein the pressure measuring device in the pressure transmitter can supply power and/or provide a control signal to the ultrasonic vibrator 3 through an external circuit if the fluid medium to be measured is viscous or prone to crystallization. Through control ultrasonic vibrator 3 produces the vibration, forms the vibration field in the metal diaphragm 6 department that is used for the pressure measurement, the vibration field makes the one side that metal diaphragm 6 contacts the fluid medium that awaits measuring produce the vibration for the fluid medium that awaits measuring is in the vibration state, prevents that the fluid that awaits measuring crystallization from attaching to or bonding in the influence pressure measurement result on metal diaphragm 6 surface to cause the damage to pressure transmitter's pressure measurement device. Under the condition that the metal diaphragm 6 is not influenced by the fluid medium to be measured, pressure signals transmitted by the pressure guide cavity 7 and the pressure guide pipe 10 through the filling liquid 5 in the pressure guide cavity are converted into electric signals and output, and the purpose of measuring the pressure of the fluid medium to be measured is achieved. Therefore, the pressure measuring device can work normally under the working conditions that the fluid medium to be measured is viscous and easy to crystallize, the accurate measuring result is ensured, and the service life is prolonged.
The above description is only a preferred embodiment of the present application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention according to the present application is not limited to the specific combination of the above-mentioned features, but also covers other embodiments where any combination of the above-mentioned features or their equivalents is made without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (17)
1. A pressure measuring device for measuring the pressure of a fluid medium, characterized in that the pressure measuring device for measuring the pressure of a fluid medium comprises:
a base (4);
the metal diaphragm (6) is arranged on the base (4) and used for sensing the pressure of a fluid medium to be detected, and a pressure guide cavity (7) is formed between the metal diaphragm (6) and the base (4);
a pressure pipe (10), the pressure pipe (10) is communicated with the pressure guide cavity (7) and is used for transmitting the pressure of the fluid medium to be detected sensed by the metal diaphragm (6), an
The vibrating device can enable the fluid medium to be measured near the metal diaphragm (6) to be in a vibrating state.
2. Pressure measuring device for measuring the pressure of a fluid medium according to claim 1, characterized in that the vibration means comprise at least one ultrasonic vibrator (3), the ultrasonic vibrator (3) being arranged on the side of the base (4) facing away from the metal diaphragm (6).
3. The pressure measuring device according to claim 2, wherein the ultrasonic vibrator (3) is connected to a terminal (9) through a transmission line (8), and an external circuit is connected to the terminal (9), and the external circuit supplies power to the ultrasonic vibrator (3) and/or provides a control signal.
4. The pressure measuring device for measuring fluid medium pressure according to claim 3, wherein the number of the ultrasonic vibrators (3) is provided in plural, and the plural ultrasonic vibrators (3) are uniformly arranged around the metal diaphragm (6).
5. The pressure measuring device for measuring fluid medium pressure according to claim 2, wherein a first mounting hole (14) for mounting the ultrasonic vibrator (3) is provided on the base (4), and the ultrasonic vibrator (3) is embedded in the base (4) through the first mounting hole (14).
6. Pressure measuring device for measuring the pressure of a fluid medium according to claim 1, characterized in that the side of the base (4) facing the metal membrane (6) is configured with a corrugated structure.
7. Pressure measuring device for measuring the pressure of a fluid medium according to claim 1, characterized in that a first through hole (12) is provided on the base (4), and the pressure guiding tube (10) communicates with the pressure guiding chamber (7) through the first through hole (12).
8. Pressure measuring device for measuring the pressure of a fluid medium according to claim 1, characterized in that the pressure line (10) is configured as a capillary tube.
9. Pressure measuring device according to claim 1, characterized in that the pressure conducting tube (10) and the pressure conducting chamber (7) are filled with a filling liquid (5) for conducting pressure.
10. Pressure measuring device for measuring the pressure of a fluid medium according to claim 1, characterized in that the side of the metal diaphragm (6) is configured with an annular corrugated structure.
11. Pressure measuring device for measuring the pressure of a fluid medium according to claim 1, characterized in that the metal diaphragm (6) is elastically deformed according to the sensed pressure of the fluid medium to be measured.
12. The pressure measuring device for measuring fluid medium pressure according to any one of claims 1 to 11, characterized in that the pressure measuring device for measuring fluid medium pressure further comprises a flange (1), the flange (1) being used for fixing the pressure measuring device.
13. The pressure measuring device for measuring the pressure of a fluid medium according to claim 12, further comprising a cylinder (2), wherein the two ends of the cylinder (2) are respectively connected with the base (4) and the flange (1).
14. Pressure measuring device for measuring the pressure of a fluid medium according to claim 13, characterized in that the base (4), the cylinder (2) and the flange (1) form a housing of the pressure measuring device for measuring the pressure of a fluid medium, the vibration device being accommodated in the housing.
15. Pressure measuring device for measuring the pressure of a fluid medium according to claim 12, characterized in that on the flange (1) there are provided:
a second through hole (13); and
a fixing sleeve (11) for fixing the pressure pipe (10),
the pressure guide pipe (10) penetrates through the second through hole (13) and the fixing sleeve (11) to be fixed on the flange (1).
16. Pressure measuring device according to claim 12, characterized in that a first mounting hole (15) is provided in the flange (1) for mounting the terminal (9), the terminal (9) being fixed to the flange (1) via the first mounting hole (15).
17. Pressure transmitter, characterized in that it comprises a pressure measuring device for measuring the pressure of a fluid medium according to any one of claims 1-16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110169269.2A CN114910210A (en) | 2021-02-07 | 2021-02-07 | Pressure measuring device for measuring fluid medium pressure and pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110169269.2A CN114910210A (en) | 2021-02-07 | 2021-02-07 | Pressure measuring device for measuring fluid medium pressure and pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114910210A true CN114910210A (en) | 2022-08-16 |
Family
ID=82761115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110169269.2A Pending CN114910210A (en) | 2021-02-07 | 2021-02-07 | Pressure measuring device for measuring fluid medium pressure and pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114910210A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104155A (en) * | 1987-06-09 | 1987-11-18 | 上海第三纺织机械厂 | Diaphragm type High Temperature High Pressure flow media pressure transducer |
| CN102402980A (en) * | 2011-02-15 | 2012-04-04 | 何伟宗 | Mode and device for carrying out energy transfer between ultrasonic wave and vibration wave energy converter and liquid connecting tool head |
| CN206258165U (en) * | 2016-12-22 | 2017-06-16 | 重庆九天测控仪器制造有限公司 | Diaphragm type throw-in type liquid transmitter |
| DE102016209538A1 (en) * | 2016-06-01 | 2017-12-07 | Robert Bosch Gmbh | Pressure sensor for detecting a pressure of a fluid medium in a measuring space |
| CN107543645A (en) * | 2016-06-29 | 2018-01-05 | 云南科威液态金属谷研发有限公司 | Diaphragm pressure transmitter |
| CN109570152A (en) * | 2018-11-22 | 2019-04-05 | 江苏理文化工有限公司 | A kind of scale-free heat conductive flow controller |
| CN208780386U (en) * | 2018-06-15 | 2019-04-23 | 江苏德尔森传感器科技有限公司 | A kind of pressure sensor |
| CN112179612A (en) * | 2020-09-27 | 2021-01-05 | 中国航空工业集团公司北京长城计量测试技术研究所 | Dynamic pressure sensor |
| CN214373101U (en) * | 2021-02-07 | 2021-10-08 | 上海洛丁森工业自动化设备有限公司 | Pressure measuring device for measuring fluid medium pressure and pressure transmitter |
-
2021
- 2021-02-07 CN CN202110169269.2A patent/CN114910210A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104155A (en) * | 1987-06-09 | 1987-11-18 | 上海第三纺织机械厂 | Diaphragm type High Temperature High Pressure flow media pressure transducer |
| CN102402980A (en) * | 2011-02-15 | 2012-04-04 | 何伟宗 | Mode and device for carrying out energy transfer between ultrasonic wave and vibration wave energy converter and liquid connecting tool head |
| DE102016209538A1 (en) * | 2016-06-01 | 2017-12-07 | Robert Bosch Gmbh | Pressure sensor for detecting a pressure of a fluid medium in a measuring space |
| CN107543645A (en) * | 2016-06-29 | 2018-01-05 | 云南科威液态金属谷研发有限公司 | Diaphragm pressure transmitter |
| CN206258165U (en) * | 2016-12-22 | 2017-06-16 | 重庆九天测控仪器制造有限公司 | Diaphragm type throw-in type liquid transmitter |
| CN208780386U (en) * | 2018-06-15 | 2019-04-23 | 江苏德尔森传感器科技有限公司 | A kind of pressure sensor |
| CN109570152A (en) * | 2018-11-22 | 2019-04-05 | 江苏理文化工有限公司 | A kind of scale-free heat conductive flow controller |
| CN112179612A (en) * | 2020-09-27 | 2021-01-05 | 中国航空工业集团公司北京长城计量测试技术研究所 | Dynamic pressure sensor |
| CN214373101U (en) * | 2021-02-07 | 2021-10-08 | 上海洛丁森工业自动化设备有限公司 | Pressure measuring device for measuring fluid medium pressure and pressure transmitter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6968073B2 (en) | Pipe fitting with sensor | |
| CN109563866B (en) | Intelligent bolt and using method thereof | |
| JP4699935B2 (en) | Flange fastening monitoring device | |
| CN202182796U (en) | Pressure sensor assembly and process transmitter comprising same | |
| JP2005335692A (en) | System and method for generating electricity from mechanical energy of rotating tire | |
| US9880049B2 (en) | Measuring device and component with measuring device integrated therein | |
| CN214373101U (en) | Pressure measuring device for measuring fluid medium pressure and pressure transmitter | |
| CN103119408A (en) | Exhaust gas temperature sensor including strain relief and/or anti-vibration sleeve | |
| CN105122026B (en) | Bearing including sensor unit | |
| EP3037790B1 (en) | Ultrasonic flow meter housing with integrated spring connectors | |
| CN114910210A (en) | Pressure measuring device for measuring fluid medium pressure and pressure transmitter | |
| US10982973B2 (en) | Position change measuring device | |
| CN113924439A (en) | Pipeline information acquisition device | |
| CN206399564U (en) | A kind of wireless pressure sensor | |
| CN111157153A (en) | Intelligent high-precision force-sensitive sensor | |
| CN111024293B (en) | Three-dimensional force sensor and working method thereof | |
| CN209961346U (en) | Pipe wall type temperature transmitter | |
| CN109387322A (en) | Pressure sensor and method for producing a pressure sensor | |
| US10457547B2 (en) | Multi-layer, stress-isolation platform for a MEMS die | |
| EP3670005B1 (en) | Ultrasonic transducer device and air suspension device comprising an ultrasonic transducer device | |
| CN210089906U (en) | Flange type full-sealed tension sensor | |
| CN214893828U (en) | Pressure sensor | |
| CN218271190U (en) | Pressure remote transmission device and pressure measuring equipment | |
| JP7345173B2 (en) | pressure sensor | |
| CN220625590U (en) | Pressure sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |