CN214373101U - Pressure measuring device for measuring fluid medium pressure and pressure transmitter - Google Patents

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 pressure pipe, the pressure pipe with pressure guide chamber intercommunication is used for the conduction the fluid medium's that awaits measuring pressure of metal diaphragm sensing to and vibrating device, vibrating device can make near the fluid medium that awaits measuring in metal diaphragm is in the vibration state, the utility model discloses utilize vibrating device to form the vibration field, make the fluid medium that awaits measuring continuously shake, prevent to glue to protect the pressure measuring device not influenced, can ensure to await measuring the fluid medium and glue thick, under the operating mode of easy crystallization, the pressure measuring device can normally work, improves life.

Description

Pressure measuring device for measuring fluid medium pressure and pressure transmitter

Technical Field

The utility model relates to a pressure measurement device and pressure transmitter for measuring fluid medium pressure.

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, the demand for various pressure measurement devices is also continuously increased in the future.

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 pressure or liquid level measurement. 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. The viscous medium, especially the medium easy to crystallize, is easy to adhere on the measuring diaphragm box along with the prolonging of the service time, and influences the elasticity of the diaphragm, further influences the performance, and even damages the pressure measuring diaphragm box.

Pressure measurement adopts the pressure of the fluid medium that the metal diaphragm sensing awaits measuring, through metal diaphragm sensing pressure, produce deformation, and then the pressure conduction to the control unit who will gather, carry out the conversion of pressure signal and signal of telecommunication, and when measuring fluid medium's pressure, some fluid medium are easily become thick state or take place the crystallization owing to the nature reason of medium itself, along with the extension of live time, the fluid medium that awaits measuring can bond, adhere to on the metal diaphragm, influence the diaphragm elasticity, destroy pressure measuring device's performance and reduce pressure measuring device's life. Therefore, the utility model provides a pressure measurement device and pressure transmitter for measuring fluid medium pressure aims at solving a great deal of problem that exists among the prior art.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problem, an object of the present invention is to provide a pressure measuring device for measuring fluid medium pressure. 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 pressure of a fluid medium is provided, wherein the pressure measuring device for measuring a pressure of a fluid medium 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 tested sensed by the metal diaphragm, and

and the vibration device can enable the fluid medium to be tested 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:

at least one ultrasonic vibrator, ultrasonic vibrator sets up in on the side of base dorsad the metal diaphragm. 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 the connection terminal through a transmission line, and the connection terminal is connected to an external circuit, which supplies power and/or provides a control signal to the ultrasonic vibrator.

According to some embodiments of the first aspect of the present invention, the number of the ultrasonic vibrators is set to be plural, and the plural ultrasonic vibrators surround the metal diaphragm and are uniformly arranged. 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 the 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, the 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, the base is provided with a first through hole, and the pressure pipe passes through the first through hole and the pressure guide cavity.

According to some embodiments of the first aspect of the present invention, the pressure guiding tube is configured as a capillary tube.

According to some embodiments of the first aspect of the present invention, the pressure guiding pipe and the pressure guiding cavity are filled with a filling liquid for conducting pressure.

According to some embodiments of the first aspect of the present invention, the side of the metal diaphragm is configured with an annular corrugated structure, the annular corrugated structure helps to stabilize the fluid pressure to be measured, and increase the contact area with the fluid to be measured, thereby facilitating more accurate collection of the pressure of the fluid medium to be measured.

According to some embodiments of the first aspect of the present invention, the metal diaphragm generates elastic deformation according to the sensed fluid medium pressure to be measured, after the metal diaphragm generates elastic deformation, the metal diaphragm is utilized to conduct pressure to the signal conversion unit by the pressure conduction cavity formed between the base and the filling liquid in the pressure conduction pipe communicated with the pressure conduction cavity.

According to some embodiments of the first aspect of the present invention, the pressure measuring device for measuring fluid medium pressure further comprises a flange for fixing the pressure measuring device.

According to some embodiments of the first aspect of the present invention, the pressure measuring device for measuring fluid medium pressure further comprises a cylinder, wherein the cylinder ends are respectively connected to the base and the flange.

According to some embodiments of the first aspect of the present invention, the base the barrel and the flange form a casing of a pressure measuring device for measuring fluid medium pressure, the vibrating device is accommodated in the casing, and the casing plays a role in supporting and protecting the entire set of pressure measuring device.

According to some embodiments of the first aspect of the present invention, the flange is provided with:

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 the connection terminal, and the connection terminal passes through the second mounting hole to be fixed to the flange. 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 present invention, the present invention provides a pressure transmitter, the pressure transmitter includes the pressure measuring device for measuring the pressure of a fluid medium as described above. And the pressure measuring device transmits the pressure signal to a signal conversion unit of the pressure transmitter after collecting the pressure signal, and converts the pressure signal 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 structural view according to an embodiment of the present invention;

list of reference numerals:

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. Connecting 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 solution of the embodiment 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 part of the embodiments of the invention, and not to all embodiments. Based on the embodiments disclosed in the present application, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present application.

The terms "first," "second," "third," and the like in the description and in the claims of the present application are used for distinguishing between different objects and not for describing a particular 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 given orientation or positional relationship indicated in the drawings for ease of description and simplicity of description only, and do not indicate or imply that the device, mechanism, structure, or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered 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 vibrator 3 is connected to a connection terminal 9 through a transmission line 8, and an external circuit that supplies power and/or a control signal to the ultrasonic vibrator 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 vibrators 3 may be arranged radially and symmetrically with respect to the center of the base 4, that is, the two ultrasonic vibrators 3 are respectively located at the top and the bottom of the base 4, and the distances from the two ultrasonic vibrators 3 to the center of the circle are equal, and the ultrasonic vibrators are arranged symmetrically with respect to the center of the circle 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 apparatus for measuring a pressure of a fluid medium shown in fig. 1, a first mounting hole 14 for mounting an ultrasonic vibrator 3 is provided in the 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 vibrators 3 may be the same as the number of the first mounting holes 14, that is, each of the ultrasonic vibrators 3 is fitted into the first mounting hole 14 uniquely corresponding thereto, or the number of the ultrasonic vibrators 3 may be larger than the number of the first mounting holes 14, that is, a plurality of the ultrasonic vibrators 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 diaphragm 6 is provided with a wave-shaped structure such as a "U" shape, a "V" shape, and the like, which can meet the requirement of pressure transmission and realize a better pressure guiding effect of the pressure measuring device.

In the pressure measuring device for measuring the pressure of the fluid medium shown in fig. 1, a first through hole 12 is arranged on the base 4, the pressure guide pipe 10 is communicated with the pressure guide cavity 7 formed between the metal diaphragm 6 and the base 4 through the first through hole 12 at one end, and the other end is communicated with 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 cross-sectional shape of the first through hole 12 may be circular, oval, square or other suitable shapes, so as to facilitate the manufacturing, transportation, installation, maintenance and the like, and of course, the present invention also allows the first through hole 12 to be constructed into a more complex structure, so as to fully satisfy various application requirements.

In the case of the pressure measuring device for measuring the pressure of a fluid medium shown in fig. 1, the pressure lines 10 are designed as capillary tubes. The utility model discloses according to the different capillaries of operating mode selectable length and pipe diameter of difference, satisfy the pressure conduction demand that corresponds.

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 liquid 5 that fills of selection is silicone oil, it is to be explained the utility model discloses a fill liquid 5 not only is limited to silicone oil, and other ability pressure conduction fill liquid 5 bodies can be selected to use equally, like glycerine, liquid metal gallium etc. above-mentioned material all belongs to the stable and biography pressure liquid that accords with safe environmental protection requirement of nature, consequently can guarantee safe and reliable in measuring environment and operation. In the utility model discloses, what chooseed for use is that it has filling liquid 5 to fill in pressure guide cavity 7 and pressure guide pipe 10. According to some other embodiments, other can conduct pressure such as gas, liquid etc. all can be regarded as the utility model discloses well packing material in pressure guiding chamber 7 and the pressure guiding pipe 10 can be stably conducted pressure to the condition under guaranteeing pressure guiding chamber 7 and pressure guiding pipe 10 and inside packing material, can select suitable material to fill according to actual production and application.

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 diaphragm 6 is provided with a plurality of concentric rings with gradually increasing diameters by taking the geometric center of the metal diaphragm 6 as the center of a circle, and the corrugations are continuously distributed along the diameter direction of the metal diaphragm 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 deforms, which helps the collected pressure to be quickly and accurately conducted through the pressure guide cavity 7 and the pressure guide pipe 10.

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 obviously 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 this 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 here that the second through hole 13 and the fixed sleeve 11 are arranged to mechanically fix the pressure pipe 10, so that the pressure pipe can conduct pressure and is connected with the signal conversion unit, and therefore, the setting mode satisfying the condition can be selected in the utility model, if the fixed sleeve 11 is located on the inner side of the flange 1, namely, the pressure pipe 10 firstly passes through the fixed sleeve 11 and then passes through the second through hole 13, and the setting mode which can reach the fixed pressure pipe 10 can also be selected for use.

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 structure, so that various different application requirements can be fully satisfied.

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 guiding cavity 7 and the pressure guiding pipe 10, the position P shown in fig. 1 is the position P, and the pressure guiding pipe 10 in the position P in fig. 1 is connected with a signal conversion unit, i.e. the pressure signal transmitted by the pressure guiding cavity 7 and the pressure guiding pipe 10 is converted into an electric signal.

It should be noted that the present invention has been described above only by way of example 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 pointed out that the utility model provides a barrel 2 forms the guard action to the inside subassembly of barrel 2 to still can provide the supporting role to vibrating device through this barrel 2, thereby can make overall structure compacter 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 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 any feasible connection mode such as welding, riveting, screwing and the like, so that an integrated integral structure is formed.

It should be noted that, in the housing formed by the base 4, the cylinder 2 and the flange 1 of the present invention, the cross-sectional shape 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 the metal material, and other materials with the same effect and better corrosion resistance can be selected. The structural connection mode related to 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 are completely allowed to be flexibly set, selected or adjusted according to the actual application requirement conditions for the specific setting number, arrangement position, structural size and the like of such holes. Thereby facilitating manufacturing, transportation, installation, maintenance, etc. Of course, the invention also allows the holes to be constructed in a more complex design in order to be able to fully 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 and the first through hole 12 or the second through hole 13 disposed thereon may be integrally formed by a casting process, a machining process, or the like, so as to improve the reliability and the service life of the device.

According to the utility model discloses an on the other hand provides a pressure transmitter, pressure transmitter includes as before the pressure measurement device who is used for measuring fluid medium pressure, pressure measurement device among the pressure transmitter if meet the fluid medium that awaits measuring comparatively thick or the easy condition of crystallization, can supply power and/or provide control signal to ultrasonic vibrator 3 through external circuit. 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 understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. 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), and

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 diaphragm (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 for measuring the pressure of a fluid medium 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 the 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. The pressure measuring device for measuring the pressure of the fluid medium according to claim 3, further comprising a flange (1), wherein the flange (1) is used for fixing the pressure measuring device, a second mounting hole (15) for mounting the terminal (9) is formed in the flange (1), and the terminal (9) is fixed to the flange (1) through the second 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 of claims 1-16.

Images