CN218271190U - Pressure remote transmission device and pressure measuring equipment - Google Patents

Abstract

The application relates to a pressure teletransmission device and pressure measurement equipment, pressure teletransmission device includes: the first pressure transfer component is connected to a medium container or a pipeline to be detected; the second pressure transmission component is connected with the first pressure transmission component and further transmits the pressure to a remote transmission target point; the first pressure transmission assembly comprises a first pressure transmission unit formed based on a closed pressure liquid guide system, the second pressure transmission assembly comprises a second pressure transmission unit formed based on a closed pressure liquid guide system, the first pressure transmission assembly and the second pressure transmission assembly are connected with each other through a detachable joint, and in the detachable joint, the first pressure transmission unit and the second pressure transmission unit are automatically disconnected or connected in a pressure transmission mode along with the detachment or assembly of the mechanical connecting mechanism. The foundation the utility model discloses, under the condition that realizes accurate pressure measurement, biography pressure, solved in the past teletransmission pressure transmitter overhaul, inspection and the inconvenient difficult problem of calibration.

Description

Pressure remote transmission device and pressure measuring equipment

Technical Field

The utility model relates to a ressure measurement field especially relates to a pressure teletransmission device and a pressure measurement equipment.

Background

Pressure transmitters are often used in intelligent and digital pressure measurement equipment. Pressure transmitter generally refers to pressure, absolute pressure and differential pressure transmitter, and is an instrument for converting pressure parameters (for example, collected in the form of analog electrical signals) of a medium such as gas or liquid into standard electrical signals. The remote pressure transmitter is suitable for measuring special media such as high temperature, corrosion and the like, is produced as a derivative application of the pressure transmitter, and comprises a remote pressure transmission assembly consisting of a pressure measuring diaphragm, a capillary tube, pressure guide liquid and the like besides a common pressure transmitter.

Pressure transmitters belong to the class of meters as measuring devices, which require periodic calibration for verification of the accuracy of the measurement. Generally, the pressure measuring part of the pressure transmitter can be connected with a medium container or a pipeline to be measured (such as a medium tank body) in a flange mode, and the pressure transmitter can be easily verified only by disassembling a flange connecting mechanism when required. However, in many practical working conditions, a remote transmission pressure transmitter is often used for measuring the pressure of some high-risk special media, if a conventional flange connecting mechanism is still adopted between a medium tank body and a pressure measuring part of the pressure transmitter, the leakage of the media is easy to occur during disassembly and verification, so that serious potential safety hazards can be brought, for example, metal sodium liquid is taken as an example, if the sodium liquid leaks and contacts air, the sodium liquid is easy to combust to cause explosion; for preventing that the medium from leaking and causing the safety risk, pressure measurement portion of pressure transmitter and its pressure measurement diaphragm can adopt welding mode and medium jar body to be connected, from this, can avoid leading the leakage of the medium that awaits measuring of pressure point department to a certain extent admittedly, but based on this kind of non-detachable connection, the periodic inspection calibration of teletransmission pressure transmitter becomes difficult problem again.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pressure teletransmission device to at least some overcome the defect that exists among the prior art. The pressure remote transmission device is particularly suitable for pressure measuring equipment comprising a pressure transmitter, solves the problem of inconvenient maintenance, inspection and calibration of the prior remote transmission pressure transmitter under the condition of realizing accurate pressure measurement and pressure transmission, and can keep and support the leakage-proof design of a medium to be measured at a pressure leading point.

According to the utility model discloses a first aspect provides a pressure teletransmission device, include: the first pressure transmission assembly is connected to a medium container or a pipeline to be detected so as to receive and transmit the pressure of a medium to be detected; the second pressure transmission component is connected with the first pressure transmission component and further transmits the pressure transmitted by the first pressure transmission component to a remote transmission target point; the first pressure transmission assembly comprises a first pressure transmission unit formed based on a closed pressure liquid guide system, the second pressure transmission assembly comprises a second pressure transmission unit formed based on a closed pressure liquid guide system, the first pressure transmission assembly and the second pressure transmission assembly are connected with each other through a detachable joint, and in the detachable joint, the first pressure transmission unit and the second pressure transmission unit are automatically disconnected or connected in a pressure transmission mode along with the detachment or assembly of the mechanical connecting mechanism.

According to the technical scheme of the utility model, on the pressure measurement/biography pressure route, be independent of the medium joint structure that awaits measuring of drawing pressure point department (contain usually and prevent leaking the design), set up a detachable joint between passing the pressure subassembly, this detachable joint has unified integrated mechanical connecting mechanism and has passed and press connecting mechanism, can realize the synchronous operation that mechanical connection and biography pressure are connected, has solved the technical problem that provides with particularly advantageous mode from this.

According to the utility model discloses an embodiment, removable joint includes the first joint component of first pressure transmission subassembly one side and the second joint component of second pressure transmission subassembly one side, and first joint component and second joint component can pass through mechanical element removable assembly and come together, and make first pressure transmission subassembly and second pressure transmission subassembly location are connected.

Preferably, the detachable joint is configured as a flange joint, the first joint part of the first pressure transfer assembly being formed as a connecting flange and the second joint part of the second pressure transfer assembly being formed as a remote transmitting flange.

In this regard, it may be further specified that: the connecting flange and the remote transmission flange are respectively provided with a central boss, and the top surfaces of the two central bosses are butted and attached to each other in the state that the first pressure transmission assembly is connected with the second pressure transmission assembly in a positioning manner.

It is further preferred that the central boss of the connecting flange and the central boss of the remote transmitting flange have the same outer diameter, and that the two central bosses are aligned and positioned by a guide ring sleeve that is hooped on the outer periphery of the central boss when the first pressure transmission member and the second pressure transmission member are connected.

According to the utility model discloses an embodiment, be provided with on the first joint part and belong to the first pressure transmission diaphragm of first pressure conduction unit, be provided with on the second joint part and belong to the second pressure transmission diaphragm of second pressure conduction unit under the state that first pressure transmission subassembly is connected with second pressure transmission subassembly location, first pressure transmission diaphragm and second pressure transmission diaphragm laminate each other to can conduct pressure.

In this respect, according to the utility model discloses an embodiment, first pressure transmission subassembly include the pressure measurement diaphragm, bear the pressure measurement base, the first capillary of this pressure measurement diaphragm and bear in on the first joint part first pressure transmission diaphragm, wherein, be formed with the pressure measurement space between pressure measurement diaphragm and pressure measurement base, be formed with first pressure transmission space between first joint part and first pressure transmission diaphragm, first capillary intercommunication the pressure measurement space with first pressure transmission space to form a seal chamber jointly, this seal chamber is inside to be filled has pressure-conducting liquid, thereby constitutes first pressure conduction unit.

Further, according to the utility model discloses an embodiment, first pressure transmission subassembly still includes with the pressure measurement base with first joint part fixed connection's stay tube, first capillary extends through the pressure measurement base the stay tube with first joint part, wherein, makes pressure measurement diaphragm orientation on the pressure measurement base the inner chamber of await measuring medium container or pipeline, and makes first pressure transmission diaphragm on the first joint part dorsad the inner chamber of await measuring medium container or pipeline.

According to the utility model discloses an embodiment, first pressure transmission subassembly is still including being used for with the medium container or the pipeline turn-on connection's that awaits measuring interface piece, pressure measurement base fixed mounting be in on the interface piece.

The interface piece may be designed as a pipe section, in which the pressure measuring base is at least partially inserted and welded to the pipe section in a sealing manner. That is, the pressure measuring part and the pressure measuring membrane thereof can still be connected with a medium container or pipeline (such as a medium tank body) to be measured in a welding mode, so that the medium leakage-proof effect can be realized by simple and easy measures under the condition that the joint structure at the pressure leading point is stable and reliable.

According to the utility model discloses an embodiment, the second passes pressure subassembly including bear in on the second connects the part second passes pressure diaphragm and second capillary, wherein, is formed with second and passes pressure space between second connects the part and second and passes pressure diaphragm, the second capillary intercommunication second passes pressure space and the measuring chamber that is located teletransmission target point department to form a seal chamber body jointly, this seal chamber body is inside to be filled there is pressure conduction liquid, thereby constitutes second pressure conduction unit.

In this case, it is expedient for the second pressure-transmitting diaphragm on the second connection part to be oriented toward the first pressure-transmitting diaphragm on the first connection part and for the second capillary to extend through the second connection part as far as the measurement chamber.

Advantageously, the overall elastic properties (deformation properties) of the assembly formed when the first pressure transfer diaphragm and the second pressure transfer diaphragm are in close contact are identical or substantially identical to the elastic properties (deformation properties) of the pressure sensing diaphragm, so that accurate pressure transfer can be achieved.

According to the utility model discloses an embodiment, the pressure measurement diaphragm first pressure transmission diaphragm with the second passes the pressure diaphragm and is circular sheetmetal, and wherein preferred, the diameter of first pressure transmission diaphragm is greater than the diameter of pressure measurement diaphragm, the diameter that the second passed the pressure diaphragm equals the diameter of first pressure transmission diaphragm.

According to the utility model discloses an embodiment, the thickness of first pressure transmission diaphragm with the thickness sum of second pressure transmission diaphragm equals the thickness of pressure measurement diaphragm.

According to the utility model discloses an embodiment, first pressure transmission diaphragm with the second passes pressure diaphragm and is the corrugated diaphragm that has ring shape ripple under first pressure transmission subassembly and the second state of passing pressure transmission subassembly location connection, the ring shape ripple of two corrugated diaphragms is rabbeted each other and is made first pressure transmission diaphragm and second pass pressure diaphragm closely laminate.

According to the utility model discloses an embodiment, the pressure measurement diaphragm is the corrugated diaphragm that has ring shape ripple, the pressure measurement base is equipped with same ring shape ripple on its terminal surface of settling this pressure measurement diaphragm.

According to an embodiment of the present invention, the first transmission pressure diaphragm is a corrugated diaphragm having circular corrugations, and the first joint member is provided with the same circular corrugations on its end face where the first transmission pressure diaphragm is placed.

According to an embodiment of the present invention, the second pressure transmitting diaphragm is a corrugated diaphragm having circular corrugations, and the second joint member is provided with the same circular corrugations on a end surface thereof on which the second pressure film is placed.

According to the utility model discloses a second aspect provides a pressure measurement equipment, and this pressure measurement equipment includes aforementioned pressure teletransmission device and the pressure transmitter who links to each other with this pressure teletransmission device, and pressure transmitter is in teletransmission target point department receives and measures the pressure that is transmitted by pressure teletransmission device. The pressure transmitter can convert the pressure signal into an electric signal to be output. Therefore, according to the utility model discloses alright constitute a detachable teletransmission pressure transmitter, specially adapted remote measurement is like special high-risk medium such as metal sodium liquid.

It goes without saying that the features and advantages of the pressure transmitter according to the first aspect of the present invention are equally applicable to the pressure measuring device according to the second aspect of the present invention.

Drawings

Exemplary embodiments of the invention are shown in the drawings. The embodiments and figures disclosed herein are to be regarded as illustrative rather than restrictive. It is also noted that for purposes of clarity of illustration, certain features are not necessarily drawn to scale in the drawings.

Fig. 1 is a schematic view of a first pressure transfer assembly of a pressure telemetry unit according to an embodiment of the present invention;

fig. 2 is a schematic view of a second pressure transmission assembly of a pressure telemetering apparatus according to an embodiment of the present invention;

fig. 3 is a schematic view of a pressure measuring device according to an embodiment of the present invention, including a first pressure transfer member and a second pressure transfer member connected to each other.

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 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, in the description of the present application and the claims, certain terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are used in the orientation or positional relationship indicated in the drawings, which is for convenience only and to simplify the description, and do not represent or imply that the device, mechanism, structure, or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore the terms should not be construed as limiting the 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.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art and may be specifically interpreted based on their context within the context of the description of the relevant art.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1, fig. 2 and fig. 3 show schematic diagrams of the pressure remote transmission device and the pressure measuring apparatus of the present invention.

The utility model provides a pressure teletransmission device, it includes: a first pressure transfer assembly 100, which is connected to a medium container or pipe (such as a medium tank) to be tested, for receiving and transferring the pressure of the medium to be tested; a second pressure transmission member 200 connected to the first pressure transmission member and further transmitting the pressure transmitted by the first pressure transmission member to a remote transmission target point; the first pressure transmission assembly 100 includes a first pressure transmission unit formed based on a closed type pressure fluid system, the second pressure transmission assembly 200 includes a second pressure transmission unit formed based on a closed type pressure fluid system, and the first pressure transmission assembly 100 and the second pressure transmission assembly 200 are connected to each other by a detachable joint in which the first pressure transmission unit and the second pressure transmission unit are automatically disconnected or pressure transmission connected with the disassembly or assembly of the mechanical connection mechanism.

According to the structure, the real synchronization of the mechanical connection and the pressure transmission connection between the pressure transmission components can be realized, and in the separation and connection processes of the pressure transmission connection, no other operation is needed except the disassembly and assembly of the mechanical connecting piece. This means that in a state in which (mechanical structural elements of) the first pressure transfer assembly and the second pressure transfer assembly are connected in place with each other, a pressure transfer connection is automatically established between (the pressure conducting unit of) the first pressure transfer assembly and the second pressure transfer assembly at the same time, so that a pressure transfer can be achieved; when the first pressure transmission assembly and the second pressure transmission assembly are mutually detached, (the mechanical structural element of) the pressure transmission connection between the first pressure transmission assembly and the second pressure transmission assembly is automatically disconnected.

The utility model discloses an within range, pass the quantity of pressure subassembly unrestricted in principle. In this respect, it is conceivable, for example, that, in particular in the pressure transmission path from the second pressure transmission element to the target point, one or more pressure transmission elements of similar design can additionally be provided, which are mechanically and pressure-conductively connected to one another by means of a likewise designed detachable joint, so that a (multiple) relay pressure transmission measurement can be carried out.

Fig. 1 is a schematic view of a first pressure transfer assembly 100 of a pressure telemetry device according to an embodiment of the present invention; fig. 2 is a schematic view of a second pressure transmission assembly 200 of a pressure remote transmission according to an embodiment of the present invention; fig. 3 is a schematic view of a pressure measuring device according to an embodiment of the present invention, including a first pressure transmission assembly and a second pressure transmission assembly connected to each other. As shown, the detachable joint comprises a first joint component at one side of the first pressure transmission assembly 100 and a second joint component at one side of the second pressure transmission assembly 200, and the first joint component and the second joint component can be detachably assembled together through mechanical elements so as to position and connect the first pressure transmission assembly 100 and the second pressure transmission assembly 200. Here, the detachable joint may preferably be configured as a flange joint, the first joint part of the first pressure transmission assembly 100 being formed as the connecting flange 108, as shown in fig. 1, and the second joint part of the second pressure transmission assembly 200 being formed as the remote transmitting flange 202, as shown in fig. 2.

Referring to fig. 2 and 3, the connecting flange 108 and the remote transmitting flange 202 respectively have central bosses, and top surfaces of the central bosses are abutted against each other in a state where the first pressure transmission assembly 100 and the second pressure transmission assembly 200 are positioned and connected. Preferably, the central boss of the connecting flange 108 and the central boss of the remote transmitting flange 202 have the same outer diameter, and when the first pressure transmission assembly 100 and the second pressure transmission assembly 200 are connected, the two central bosses are aligned and positioned by the guide ring sleeve 301 which surrounds the periphery of the central bosses. Here, after aligning and positioning the two center bosses by the guide collar 301, the two center bosses may be fastened by bolts 401, as shown in fig. 3. The specific design and configuration dimensions of such an orienting and guiding mechanism, in particular with respect to the guide collar, are within the reach of the person skilled in the art by appropriate design and calculation.

According to an embodiment of the present invention, the first joint member is provided with the first pressure transmission diaphragm 107 (see fig. 1) belonging to the first pressure transmission unit, and the second joint member is provided with the second pressure transmission diaphragm 201 (see fig. 2) belonging to the second pressure transmission unit, and in a state where the first pressure transmission assembly 100 and the second pressure transmission assembly 200 are connected in a fixed position, the first pressure transmission diaphragm 107 and the second pressure transmission diaphragm 201 are attached to each other, so that pressure can be transmitted (see fig. 3). In the process of assembling and disassembling the pressure measuring device (or the remote pressure transmitter), i.e. in the process of disassembling or assembling the mechanical connecting mechanism of the detachable connector, based on the arrangement of the guide ring sleeve 301, the first pressure transmission diaphragm 107 and the second pressure transmission diaphragm 201 can also be accurately positioned.

As shown in fig. 1, according to an embodiment of the present invention, the first pressure transmission assembly 100 includes a pressure measuring diaphragm 102, a pressure measuring base 103 for bearing the pressure measuring diaphragm, a first capillary 106 and a first pressure transmission diaphragm 107 carried on the first joint component, wherein a pressure measuring space is formed between the pressure measuring diaphragm and the pressure measuring base, a first pressure transmission space is formed between the first joint component and the first pressure transmission diaphragm 107, the first capillary 106 communicates the pressure measuring space with the first pressure transmission space, and a sealed cavity is formed jointly, and the sealed cavity is filled with a pressure transmission fluid 104, thereby forming the first pressure transmission unit. The hydraulic fluid 104 is an incompressible fluid, which may be high temperature silicone oil or other high temperature metal fluid, as is conventional.

As shown in fig. 1, according to an embodiment of the present invention, the first pressure transfer assembly 100 further includes a supporting tube 105 fixedly connecting the pressure measuring base 103 with the first joint member, the first capillary 106 extends through the pressure measuring base 103, the supporting tube 105 and the first joint member, wherein the pressure measuring diaphragm 102 on the pressure measuring base 103 is oriented toward the inner cavity of the medium container or pipe to be measured, and the first pressure transfer diaphragm 107 on the first joint member is oriented away from the inner cavity of the medium container or pipe to be measured.

As shown in fig. 1, according to an embodiment of the present invention, the first pressure transmission assembly 100 further includes an interface for connecting with a medium container or a pipe to be measured, and the pressure measuring base 103 is fixedly mounted on the interface. The interface piece can be designed as a pipe section 101, in which the pressure measuring base 103 is at least partially inserted and welded in a sealing manner. Thus, the medium leakage prevention effect can be achieved with simple and easy measures with a stable and reliable joint structure at the pressure leading point.

As shown in fig. 2, according to an embodiment of the present invention, the second pressure transmission assembly 200 includes the second pressure transmission diaphragm 201 and a second capillary 203 carried on the second joint component, wherein a second pressure transmission space is formed between the second joint component and the second pressure transmission diaphragm, the second capillary 203 communicates with the second pressure transmission space and a measurement chamber located at a remote transmission target point (where the pressure transmitted from the second pressure transmission space directly or indirectly acts on a sensor, such as a pressure sensitive element), and forms a sealed cavity together, and the sealed cavity is filled with a pressure transmission liquid 204, thereby forming the second pressure transmission unit. Here, the pressure guiding fluid 204 may be silicone oil, which can transmit pressure well.

As shown in fig. 2 and 3, according to an embodiment of the invention, the second pressure transfer membrane 201 on the second joint part faces the first pressure transfer membrane 107 on the first joint part and the second capillary 203 extends through the second joint part up to the measurement chamber. For added strength and aesthetics, a metal sheathing sleeve may be added generally external to the capillary tube, which along with the capillary tube is preferably flexible and bendable for field installation and deployment.

Advantageously, the overall elastic characteristics (deformation characteristics) of the assembly formed when the first pressure transfer diaphragm 107 and the second pressure transfer diaphragm 201 are in close contact are consistent with or substantially the same as the elastic characteristics (deformation characteristics) of the pressure sensing diaphragm 102, so that pressure can be accurately transferred without additional processing such as conversion.

Preferably, according to an embodiment of the present invention, the pressure measuring diaphragm 102, the first pressure transfer diaphragm 107 and the second pressure transfer diaphragm 201 are all circular metal sheets. Preferably, the diameter of the first pressure transfer diaphragm 107 is larger than the diameter of the pressure measuring diaphragm 102, and the diameter 201 of the second pressure transfer diaphragm is equal to the diameter of the first pressure transfer diaphragm 107.

According to the utility model discloses an embodiment can set for: the sum of the thickness of the first pressure transfer diaphragm 107 and the thickness of the second pressure transfer diaphragm 201 is equal to the thickness of the pressure measurement diaphragm 102.

In the scope of the present invention, each of the pressure transmitting diaphragm and the pressure measuring diaphragm may be a flat diaphragm or a corrugated diaphragm, particularly a corrugated diaphragm as described below.

Preferably, according to the utility model discloses an embodiment, first pressure transmission diaphragm 107 with second pressure transmission diaphragm 201 is the corrugated diaphragm that has the ring shape ripple under first pressure transmission subassembly 100 passes the state of being connected with second pressure transmission subassembly 200 location, and the ring shape ripple of two corrugated diaphragms is rabbeted each other and makes first pressure transmission diaphragm and second pressure transmission diaphragm closely laminate. That is, the circular corrugations of the first pressure transmission diaphragm and the second pressure transmission diaphragm are matched, the shapes and the sizes of the circular corrugations are the same, and in the positioning and connecting state, the corrugations are meshed in a concave-convex mode, so that the two diaphragms are in close contact without gaps, and pressure can be accurately transmitted without difference and damage.

Preferably, according to an embodiment of the present invention, the pressure measuring diaphragm 102 is a corrugated diaphragm having circular corrugations, and the pressure measuring base 103 is provided with the same circular corrugations on its end face where the pressure measuring diaphragm is placed. That is, the circular corrugations of the pressure measuring diaphragm are matched with the circular corrugations on the end face of the pressure measuring base, and the shape and the size of the circular corrugations are the same.

Preferably, according to an embodiment of the present invention, the first pressure transfer membrane 107 is a corrugated membrane having circular corrugations, and the first joint component is provided with the same circular corrugations on its end face where the first pressure transfer membrane is placed. That is, the annular corrugations of the first pressure transfer foil are identical in shape and size to the annular corrugations of the end face of the first fitting member.

Preferably, according to an embodiment of the present invention, the second pressure transmitting diaphragm 201 is a corrugated diaphragm having circular corrugations, and the second joint member is provided with the same circular corrugations on its end surface where the second pressure film is placed. That is, the circular corrugations of the second pressure transmitting diaphragm are matched with the circular corrugations on the end face of the second joint component, and the shape and the size of the circular corrugations are the same.

The utility model also provides a pressure measuring equipment 300, it includes aforementioned pressure teletransmission device and the pressure transmitter 205 that links to each other with this pressure teletransmission device, pressure transmitter is in teletransmission target point department receives and measures the pressure that is transmitted by pressure teletransmission device. The pressure transducer 205 is only schematically represented by an ellipse in the drawing, and is of a conventional design in principle, and can convert a pressure signal into an electrical signal output. Therefore, according to the utility model discloses alright constitute a detachable teletransmission pressure transmitter, be particularly suitable for remote measurement like special high-risk medium such as metal sodium liquid.

In this case, the operating principle and the structural configuration of the pressure measuring device or remote pressure transmitter are summarized as follows, based on a specific and preferred embodiment of the invention:

the pressure remote transmission device mainly comprises a first pressure transmission assembly 100 and a second pressure transmission assembly 200. The first pressure transfer assembly 100 is welded to a media container or pipe, such as a media tank, to be tested via an interface formed by a pipe segment 101. The pressure transmitter 205 is connected to the media tank via the first pressure transmitting assembly 100 and the second pressure transmitting assembly 200 to perform relay pressure transmitting measurement.

As shown in fig. 1, the first pressure transfer assembly 100 includes: the pressure measuring device comprises a pipe segment 101, a pressure measuring diaphragm 102, a pressure measuring base 103, a support pipe 105, a first capillary 106, a connecting flange 108, a first pressure transmission diaphragm 107 and pressure guide liquid 104. One end of the pipe segment 101 is connected to the pressure base 103 and the other end can be welded to the tank. The pressure measuring diaphragm 102 is a circular metal sheet with a thickness of 0.1mm, and the surface thereof is provided with circular corrugations to increase elastic deformation. The pressure measuring base 103 is mainly used as a carrier of the pressure measuring diaphragm 102, and has one end surface provided with annular corrugations, connected to the pressure measuring diaphragm 102, and fitted with the annular corrugations of the pressure measuring diaphragm, and the other end surface connected to the first capillary 106. The connecting flange 108 is a disk-shaped flange, four bolt connecting holes are arranged on the peripheral region, one end face of the connecting flange is connected with the first capillary 106, the other end face of the connecting flange is provided with a corrugated surface, and the corrugated surface is connected with the first pressure transmission membrane 107. Between the connecting flange 108 and the pressure measuring base 103, a support tube 105 is provided to connect the two, which is located outside the first capillary tube 106 and serves as a support fixture. The first pressure transfer diaphragm 107 is a circular metal sheet with the thickness of 0.05mm, the surface of the first pressure transfer diaphragm is provided with circular corrugations to increase elastic deformation, and the diameter of the first pressure transfer diaphragm 107 is slightly larger than that of the pressure measuring diaphragm 102. After the pressure measuring diaphragm 102, the pressure measuring base 103, the first capillary tube 106, the connecting flange 108 and the first pressure transfer diaphragm 107 are connected, a sealed cavity is formed. The pressure-guiding liquid 104 is injected into the sealed cavity, and can play a role in transmitting pressure. The pressure-conducting fluid 104 is an incompressible fluid such as high temperature silicone oil or other high temperature metal fluid.

As shown in fig. 2, the second pressure transmitting assembly 200 mainly includes: a remote flange 202, a second diaphragm 201, a second capillary 203 and a filling or pressure conducting fluid 204, which is connected to a pressure transmitter 205. The remote transmission flange 202 is a disk-shaped flange, four bolt connection holes are formed in the peripheral area, the remote transmission flange is similar to the connection flange 108 of the first pressure transmission assembly 100, one end surface of the remote transmission flange is provided with a corrugated surface, and the corrugated surface is connected with the second pressure transmission diaphragm 201. The second pressure transmission membrane 201 is a circular metal sheet with the thickness of 0.05mm, and the surface of the second pressure transmission membrane is provided with circular corrugations. The concave-convex structure of the circular ring-shaped corrugation of the second pressure transfer diaphragm 201 is opposite to the concave-convex structure of the first pressure transfer diaphragm 107 in direction and is embedded with each other, so that after the first pressure transfer diaphragm 107 and the second pressure transfer diaphragm 201 are attached, the surfaces of the first pressure transfer diaphragm and the second pressure transfer diaphragm can be in complete contact without gaps. The second capillary 203 may be configured as a soft metal tube connecting the remote flange 202 and the pressure transmitter 205, and a metal sheath may be provided around the outside of the capillary for added strength and aesthetics. The pressure transmitter is a conventional pressure transmitter, and the pressure transmitter, the absolute pressure transmitter and the differential pressure transmitter are generally referred to herein. The fill or pilot fluid 204 is silicone oil and is capable of transmitting pressure.

Thus, a detachable remote pressure transmitter can be constructed, wherein the first pressure transmitting diaphragm 107 at the diaphragm end of the connecting flange 108 of the first pressure transmitting assembly 100 is connected with the second pressure transmitting diaphragm 210 at the diaphragm end of the remote pressure transmitting assembly, and the first pressure transmitting diaphragm 107 and the second pressure transmitting diaphragm 201 can be tightly attached and contacted because the sizes are the same, and the concave-convex structures of the diaphragms are opposite in directions and are embedded with each other. To further achieve accuracy of the positional contact between the first pressure transmitting diaphragm 107 and the second pressure transmitting diaphragm 201, a guide collar 300 is provided on the periphery of the diaphragm ends of the connecting flange 108 and the remote transmitting flange 202 to ensure the insertion into the aligned position. Here, the connection flange 108 and the remote transmission flange 202 are fastened by bolts 401 to ensure the tightness of the positional contact between the first pressure transmission diaphragm 107 and the second pressure transmission diaphragm 201.

As shown in fig. 3, in the formed pressure measuring device 300 or remote pressure transmitter, the first pressure transmission assembly 100 and the second pressure transmission assembly 200 are connected by flanges, and the first pressure transmission diaphragm 107 and the second pressure transmission diaphragm 201 are in close contact with each other to realize pressure transmission. Specifically, after the pressure measuring diaphragm 102 of the first pressure transfer assembly 100 senses the pressure of the medium, the pressure is transmitted to the first pressure transfer diaphragm 107 through the pressure guiding liquid 104 in the first capillary 106, so that the first pressure transfer diaphragm 107 is slightly deformed; because the first pressure transmission diaphragm 107 is in close contact with the second pressure transmission diaphragm 201, under the action of deformation force, the pressure can be transmitted to the second pressure transmission diaphragm 201 at the same time; the second pressure transmission diaphragm 201 further transmits to the pressure transmitter 205 through the silicone oil inside the second capillary 203, and the pressure transmitter 205 converts the pressure signal into an electrical signal to be output.

Here, the pipe segment 101 is welded to the medium tank and fixed integrally. After the first pressure transmission assembly 100 and the second pressure transmission assembly 200 are separated at the detachable joint, the pressure of the medium in the tank body acts on the pressure measurement diaphragm 102, the pressure measurement diaphragm 102 is pressed to generate micro-motion deviation, then the pressure is transmitted to the first pressure transmission diaphragm 107 through the pressure measurement base 103 and the pressure transmission liquid 104 in the first capillary 106, and the first pressure transmission diaphragm 107 also generates micro-motion under the action of the pressure transmission liquid. In this process, the pressure-guiding fluid at one end of the pressure measuring diaphragm 102 flows to the first pressure-transmitting diaphragm 107, so that the first pressure-transmitting diaphragm 107 is convexly deformed. When the pressure-conducting fluid at the end of the pressure sensing diaphragm 102 flows to the end of the first pressure-conducting diaphragm 107, the pressure sensing diaphragm 102 comes to rest against the end face of the pressure sensing base 103, thereby stopping the pressure transmission. So that the pressure measuring diaphragm 102 or the first pressure transfer diaphragm 107 is not damaged. On one hand, after the second pressure transmission assembly 200 and the pressure transmitter 205 are disassembled, the pressure guiding liquid at one end of the pressure measuring diaphragm 102 flows to one end of the first pressure transmission diaphragm 107 under the action of the pressure of the tank body medium, so that the pressure measuring diaphragm is attached to the surface of the pressure measuring base and cannot be damaged, and therefore, an overload protection structure is formed, the safety protection function is realized, and the outflow of the tank body medium can also be prevented; on the other hand, because the diameter of the pressure measuring diaphragm 102 is smaller than the diameter of the first pressure transmitting diaphragm 107, that is, the diameter of the pressure guiding hydraulic volume chamber at one end of the pressure measuring diaphragm 102 is smaller than the diameter of the pressure guiding hydraulic volume chamber at one end of the first pressure transmitting diaphragm 107, when the pressure guiding hydraulic moves, the displacement deformation of the first pressure transmitting diaphragm is smaller than the deformation displacement of the pressure measuring diaphragm, that is, the protrusion deformation of the first pressure transmitting diaphragm 107 is very small, and the pressure transmitting diaphragm cannot be damaged. Thus, even after the second pressure transfer assembly 200 and the pressure transmitter 205 are removed, the pressure effect of the tank medium will not cause damage to the first pressure transfer assembly 100 (and in particular to its pressure sensing/transfer diaphragm). Periodic calibration and verification of the pressure transmitter can then be performed on the second pressure transmission assembly 200 side.

Here, it should be mentioned that, at the connection portion of the first pressure transmission assembly 100 and the second pressure transmission assembly 200, the first pressure transmission membrane 107 and the second pressure transmission membrane 201 can be precisely aligned by positioning the guide ring sleeve 301. The bolt fastening tension in the peripheral area of the flange can ensure that the first pressure transfer diaphragm 107 and the second pressure transfer diaphragm 201 are tightly combined; furthermore, as the fastening tension is increased, after the first pressure transmission diaphragm 107 and the pressure measurement diaphragm 102 are stressed, the deflection of the diaphragms can be eliminated, and the diaphragms can be restored to the original shape.

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 those skilled in the art that the scope of the present application is not limited to the particular combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible 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 (20)

1. A pressure telemetry device, comprising:

the first pressure transmission assembly (100) is connected to a medium container or a pipeline to be detected so as to receive and transmit the pressure of the medium to be detected;

a second pressure transmission component (200) which is connected with the first pressure transmission component and further transmits the pressure transmitted by the first pressure transmission component to a remote transmission target point;

the first pressure transmission assembly (100) comprises a first pressure transmission unit formed based on a closed pressure liquid guide system, the second pressure transmission assembly (200) comprises a second pressure transmission unit formed based on a closed pressure liquid guide system, the first pressure transmission assembly (100) and the second pressure transmission assembly (200) are connected with each other through a detachable joint, and in the detachable joint, the first pressure transmission unit and the second pressure transmission unit are automatically disconnected or connected in a pressure transmission mode along with the detachment or assembly of the mechanical connecting mechanism.

2. The pressure telemetering device according to claim 1, wherein the detachable joint comprises a first joint member on the side of the first pressure transmission assembly (100) and a second joint member on the side of the second pressure transmission assembly (200), and the first joint member and the second joint member can be detachably assembled together by a mechanical element to position the first pressure transmission assembly (100) and the second pressure transmission assembly (200).

3. Pressure telemetering device according to claim 2, wherein the detachable joint is configured as a flange joint, and the first joint part of the first pressure transmission assembly (100) is formed as a connecting flange (108), and the second joint part of the second pressure transmission assembly (200) is formed as a remote transmission flange (202).

4. The pressure transmitter according to claim 3, wherein the connecting flange (108) and the remote transmitting flange (202) each have a central boss, and wherein the top surfaces of the central bosses abut against each other in the state of the fixed connection of the first pressure transmission member (100) and the second pressure transmission member (200).

5. Pressure telemetering device according to claim 4, wherein the central boss of the connecting flange (108) and the central boss of the remote transmitting flange (202) have the same outer diameter, and the two central bosses are aligned and positioned by means of a guide ring sleeve (301) that is hooped against the outer periphery of the central bosses when connecting the first pressure transmission member (100) and the second pressure transmission member (200).

6. The pressure transmitter according to any one of claims 2 to 5, wherein a first pressure transmitting diaphragm (107) belonging to the first pressure transmission unit is provided on the first joint member, and a second pressure transmitting diaphragm (201) belonging to the second pressure transmission unit is provided on the second joint member, and the first pressure transmitting diaphragm and the second pressure transmitting diaphragm are attached to each other in a state where the first pressure transmission assembly (100) and the second pressure transmission assembly (200) are positioned and connected, so that pressure can be transmitted.

7. The pressure remote transmitting device according to claim 6, wherein the first pressure transmitting assembly (100) comprises a pressure measuring diaphragm (102), a pressure measuring base (103) for bearing the pressure measuring diaphragm, a first capillary tube (106) and the first pressure transmitting diaphragm (107) borne on the first joint member, wherein a pressure measuring space is formed between the pressure measuring diaphragm and the pressure measuring base, a first pressure transmitting space is formed between the first joint member and the first pressure transmitting diaphragm, and the first capillary tube communicates the pressure measuring space and the first pressure transmitting space and jointly forms a sealed cavity which is filled with a pressure conducting liquid (104), thereby forming the first pressure transmitting unit.

8. The pressure remote transmitting device according to claim 7, wherein the first pressure transmitting assembly (100) further comprises a support tube (105) fixedly connecting the pressure base (103) with the first connector member, the first capillary tube (106) extending through the pressure base, the support tube and the first connector member, wherein a pressure sensing diaphragm (102) on the pressure base is directed towards the lumen of the medium container or conduit to be tested, and a first pressure transmitting diaphragm (107) on the first connector member is directed away from the lumen of the medium container or conduit to be tested.

9. The pressure remote transmission device according to claim 7, characterized in that the first pressure transmission assembly (100) further comprises an interface member for conducting connection with a medium container or pipe to be measured, and the pressure measuring base (103) is fixedly mounted on the interface member.

10. The pressure telemetering device according to claim 9, wherein the interface is configured as a pipe section (101) in which the load cell (103) is at least partially inserted and sealed welded.

11. The pressure remote transmission device according to claim 6, wherein the second pressure transmission assembly (200) comprises a second pressure transmission diaphragm (201) and a second capillary tube (203) carried on the second joint component, wherein a second pressure transmission space is formed between the second joint component and the second pressure transmission diaphragm, the second capillary tube is communicated with the second pressure transmission space and the measuring chamber at the remote transmission target point and jointly forms a sealed cavity, and the sealed cavity is filled with pressure-conducting liquid (204) so as to form the second pressure transmission unit.

12. The pressure telemetry device of claim 11, characterized in that the second pressure transfer diaphragm (201) on the second joint component faces the first pressure transfer diaphragm (107) on the first joint component and the second capillary (203) extends through the second joint component to the measurement chamber.

13. Pressure telemetering device according to claim 7, wherein the overall elastic properties of the diaphragm assembly formed when the first pressure transmitting diaphragm (107) and the second pressure transmitting diaphragm (201) are attached to each other correspond to the elastic properties of the pressure sensing diaphragm.

14. The pressure telemetering device according to claim 13, wherein the pressure sensing diaphragm (102), the first pressure transmitting diaphragm (107) and the second pressure transmitting diaphragm (201) are all circular metal pieces, wherein the diameter of the first pressure transmitting diaphragm is larger than the diameter of the pressure sensing diaphragm, and the diameter of the second pressure transmitting diaphragm is equal to the diameter of the first pressure transmitting diaphragm.

15. The pressure telemetering device according to claim 14, wherein the sum of the thickness of the first pressure transmitting diaphragm (107) and the thickness of the second pressure transmitting diaphragm (201) is equal to the thickness of the pressure measuring diaphragm (102).

16. The pressure remote transmission device according to claim 14, wherein the first pressure transmission diaphragm (107) and the second pressure transmission diaphragm (201) are corrugated diaphragms having circular corrugations, and in a state that the first pressure transmission assembly (100) and the second pressure transmission assembly (200) are connected in a positioning manner, the circular corrugations of the two corrugated diaphragms are embedded with each other so that the first pressure transmission diaphragm and the second pressure transmission diaphragm are tightly attached.

17. Pressure telemetering device according to claim 14, wherein the pressure sensing diaphragm (102) is a corrugated diaphragm with circular corrugations, and the pressure sensing base (103) is provided with identical circular corrugations on its end face where the pressure sensing diaphragm is placed.

18. Pressure telemetering device according to claim 14, wherein the first pressure transmitting membrane (107) is a corrugated membrane with circular corrugations, and the first connector part is provided with identical circular corrugations on its end face where the first pressure transmitting membrane is located.

19. Pressure telemetering device according to claim 14, wherein the second pressure-transmitting diaphragm (201) is a corrugated diaphragm with annular corrugations, and the second joint member is provided with identical annular corrugations on its end face on which the second pressure-transmitting diaphragm is placed.

20. A pressure measuring device, characterized in that it comprises a pressure transmitter according to any one of claims 1-19 and a pressure transducer (205) connected to the pressure transmitter, which pressure transducer receives and measures the pressure transmitted by the pressure transmitter at the remote target point.

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