CN215952847U - Submersible differential pressure remote transmitter and measuring system - Google Patents

Abstract

The utility model relates to a submersible differential pressure remote transmission transmitter and a measuring system, comprising at least one differential pressure transmitter device, at least two remote transmission devices and at least two pressure guide components, wherein the differential pressure transmitter device comprises: the pressure guide assembly is arranged to penetrate through the shell component and fixedly and hermetically connected with the shell component; the differential pressure transmitter further comprises an electrical connector which is fixed on the shell component in a sealing mode and is configured to be in signal conduction with the circuit component so as to lead out an electrical signal output by the processed differential pressure transmitter. The submersible differential pressure remote transmitter provided by the utility model can be suitable for deep-sea and deep-water operation platforms.

Description

Submersible differential pressure remote transmitter and measuring system

Technical Field

The utility model relates to the technical field of flow measurement, in particular to a differential pressure remote transmitter for measuring pressure, and particularly relates to a submersible differential pressure remote transmitter; the utility model also relates to a measuring system comprising the submersible differential pressure remote transmitter.

Background

The pressure transmitter is an important component of the instrument industry and provides important basic data for the current industrial production. In some application scenarios, for example, in order to measure the level of a fluid contained in a tank, it is necessary to perform the measurement at a location remote from the instrument or at two different locations, which may be remote from each other and from the transmitter body itself. At the moment, the remote transmission differential pressure transmitter is provided with a specially designed remote transmission device, the remote transmission device can detect the pressure of an object to be measured in a diaphragm mode and the like and transmit the sensed pressure to the transmitter in a fluid mode of silicon oil and the like so as to achieve the purpose of measurement.

At present, remote-transmission differential pressure transmitters are widely applied to ground operation platforms of coal chemical industry, petroleum industry, metallurgy industry, water utilities and the like. However, in the deep sea platform operation, in view of the limitation of long-distance transmission and other factors of the deep sea operation environment, the existing differential pressure remote transmission transmitter structure is far from meeting the requirement.

It is therefore necessary to redesign and manufacture a submersible differential pressure transmitter.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a submersible differential pressure remote transmission transmitter and a measurement system.

According to a first aspect of the present invention, there is provided a submersible differential pressure transmitter comprising at least one differential pressure transmitter device, at least two remote transmission devices and at least two pressure directing assemblies for transmitting pressure from the remote transmission devices to the differential pressure transmitter device, the differential pressure transmitter device comprising:

a housing component that is pressure resistant and has a closed cavity;

the differential pressure transmitter is fixed in the closed cavity of the shell component and is provided with two pressure measuring ends; the two pressure guide assemblies are configured to respectively transmit the pressures detected by the two remote transmission devices to two pressure measuring ends of the differential pressure transmitter; the pressure guide assembly is arranged to penetrate through the shell component and is fixedly and hermetically connected with the shell component;

a circuit assembly fixed within the sealed cavity of the housing component and configured for processing an electrical signal output by the differential pressure transmitter;

an electrical connector sealingly secured to the housing member, the electrical connector configured to be in signal communication with the circuit assembly for drawing electrical signals output by the processed differential pressure transmitter.

In some embodiments of the utility model, the pressure directing assembly comprises:

a fluid guide tube including connection ends at both end regions thereof, and a middle region between the two connection ends thereof; two ends of the fluid guide pipe are respectively communicated with the differential pressure transmitter and the remote transmission device;

and the connecting ends of the fluid guide pipes penetrate through the fixed pipes and are sealed with the fluid guide pipes at the end parts of the fixed pipes.

In some embodiments of the utility model, the fluid guide tube is aligned with and welded to a weld lip provided on an end face of the stationary tube.

In some embodiments of the utility model, the pressure directing assembly includes a corrosion resistant sleeve through which a mid-region of the fluid directing tube passes; the end part of the anti-corrosion sleeve extends to be connected with the outer wall of the fixed pipe.

In some embodiments of the present invention, the fixing pipe is provided with a thread at least in a region contacting with the corrosion-resistant sleeve, and the corrosion-resistant sleeve is locked to the fixing pipe by a nut engaged with the thread.

In some embodiments of the utility model, the nut is a tapered nut and the corresponding region of the fixation tube has a shape that fits the tapered nut.

In some embodiments of the present invention, the fixing tube of the two pressure guide assemblies adjacent to the side of the housing member passes through the hole provided on the housing member and is connected with the housing member in a sealing and fixing manner.

In some embodiments of the present invention, the hole positions of the fixing tube and the shell component are sealed and fixed together by welding.

In some embodiments of the present invention, the housing component comprises a base plate and a barrel part enclosing a closed cavity with the base plate; the barrel part and the substrate are sealed and fixed together in a welding mode.

In some embodiments of the present invention, the cylindrical body is a cup-shaped member made of titanium metal, and the substrate is a flat plate-shaped member made of titanium metal.

In some embodiments of the present invention, the differential pressure transmitter is fixed with the base plate; the circuit assembly is connected to the differential pressure transmitter through a bracket.

In some embodiments of the present invention, one end of the electrical connector passes through the through hole provided on the cylinder and is electrically connected to the terminal of the circuit component, and the electrical connector is fixed and sealed on the outer side of the cylinder by welding.

In some embodiments of the utility model, the remote transmission device is configured with a pressure measuring flange, a fluid channel is arranged in the pressure measuring flange, and the fluid channel extends to and penetrates through the detection end face of the pressure measuring flange; a pressure diaphragm is further arranged on the detection end face of the pressure measuring flange and is configured to transmit pressure into the fluid channel; the pressure guide assembly is in communication with a fluid passage in the pressure measuring flange.

In some embodiments of the present invention, a protective cover is disposed outside the detection end face, and the pressure diaphragm is located in an inner cavity surrounded by the protective cover and the pressure measuring flange; the protection cover is provided with a micropore structure for communicating the inner cavity with the outside.

According to a second aspect of the utility model, there is also provided a measurement system in which at least one submersible differential pressure telemetric transmitter as described above is provided.

According to the technical scheme, the differential pressure transmitter and the circuit assembly are arranged in the closed cavity of the shell component, the pressure guide assembly used for transmitting pressure is in sealing fit with the shell component, and the structural design ensures the sealing performance and pressure resistance requirements of the submersible differential pressure remote transmission transmitter. Meanwhile, the electric signal output by the differential pressure transmitter positioned in the closed cavity of the shell component is processed by the circuit component and finally led out through the electric connector, compared with the traditional differential pressure remote transmission transmitter, the differential pressure remote transmission transmitter does not need a longer pressure guide component any more, reduces the transmission distance of pressure from a remote transmission device to the differential pressure transmitter, ensures the efficiency of pressure transmission and improves the precision of the differential pressure transmitter. In addition, the electric connector is adopted to lead out the signal of the transmitter, so that the long-distance transmission of the signal can be realized.

Drawings

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that the drawings are designed for illustrative purposes only and are intended to conceptually illustrate the structural configurations described herein, and are not necessarily drawn to actual scale.

Fig. 1 is a schematic structural diagram of a submersible differential pressure remote transmitter of the present invention.

Fig. 2 is a schematic view of the connection structure of the pressure guide assembly of fig. 1 with a differential pressure transmitter and a remote transmission device.

Detailed Description

First, it should be noted that the structures, compositions, features, advantages, etc. of the remote transmission device for a pressure transmitter, the remote transmission pressure transmitter, and the measurement system including the remote transmission pressure transmitter of the present invention will be specifically described below by way of examples, however, all the descriptions are for illustrative purposes only and should not be construed as forming any limitation on the present invention. In this document, the technical terms "first" and "second" are used for the purpose of differential expression only and are not intended to indicate their order or relative importance, the technical term "connected" and its derivatives mean that a specific component is directly and/or indirectly connected to another component, and the technical term "high temperature" means a temperature not lower than, for example, 300 ℃. In addition, general matters already known to those skilled in the art are not described herein in detail for the sake of clarity.

Furthermore, any single feature described or implicit in an embodiment or any single feature shown or implicit in the drawings or shown or implicit in the drawings, may still allow any combination or permutation to continue between the features (or their equivalents) without any technical barriers and thus further embodiments according to the utility model should also be considered within the scope of this disclosure.

The utility model provides a submersible differential pressure remote transmission transmitter which comprises a differential pressure transmitter device, at least two remote transmission devices and at least two pressure guide assemblies connected with the differential pressure transmitter device and the remote transmission devices. The remote transmission device is connected with the pressure measuring end of the differential pressure transmitter device through the pressure guide assembly, so that the pressure detected by the remote transmission device can be transmitted to the differential pressure transmitter device through the pressure guide assembly, and the differential pressure transmitter device can output corresponding parameters related to the pressure or other parameters obtained through pressure parameter calculation and processing.

The differential pressure transmitter device comprises a pressure-resistant shell component with a closed containing cavity, a differential pressure transmitter and a circuit component, wherein the differential pressure transmitter and the circuit component are positioned in the closed containing cavity of the shell component. One end of each of the two pressure guide assemblies is respectively communicated with two pressure measuring ends of the differential pressure transmitter so as to transmit the pressure detected by the corresponding remote transmission device to the two pressure measuring ends of the differential pressure transmitter, and the differential pressure transmitter outputs corresponding pressure parameters through the pressure difference of the two pressure measuring ends.

Wherein the pressure guiding assembly is arranged to pass through the housing part and is fixedly and sealingly connected with the housing part. The circuit assembly is configured for processing the electrical signal output by the differential pressure transmitter, such as for amplification, calculation, or other processing of the signal. An electrical connector is sealingly secured to the housing member and is configured for signal communication with the circuit assembly for drawing electrical signals output by the processed differential pressure transmitter.

According to the technical scheme, the differential pressure transmitter and the circuit assembly are arranged in the closed cavity of the shell component, the pressure guide assembly used for transmitting pressure is in sealing fit with the shell component, and the structural design ensures the sealing performance and pressure resistance requirements of the submersible differential pressure remote transmission transmitter. Meanwhile, the electric signal output by the differential pressure transmitter positioned in the closed cavity of the shell component is processed by the circuit component and finally led out through the electric connector, compared with the traditional differential pressure remote transmission transmitter, the differential pressure remote transmission transmitter does not need a longer pressure guide component any more, reduces the transmission distance of pressure from a remote transmission device to the differential pressure transmitter, ensures the efficiency of pressure transmission and improves the precision of the differential pressure transmitter. In addition, the electric connector is adopted to lead out the signal of the transmitter, so that the long-distance transmission of the signal can be realized. In conclusion, the submersible differential pressure remote transmitter can be applied to the fields of deep sea or deepwater operation platforms and the like.

Referring to fig. 1, which schematically shows a schematic configuration of an example of a submersible differential pressure transmitter according to the present invention, the technical solution of the present invention will be exemplarily described by the following embodiments.

As shown in fig. 1, the submersible differential pressure remote transmission transmitter includes a differential pressure transmitter device a, two remote transmission devices b, and two pressure guide assemblies c. While fig. 1 shows a schematic diagram of a remote transmission device b only in the right direction of a differential pressure transmitter device a, it should be noted that in this embodiment, the differential pressure transmitter device a performs measurement using the pressure difference between its two pressure measurement terminals, and therefore two remote transmission devices b are required, and the structures of the two remote transmission devices b may be identical. The two remote transmission devices b are respectively communicated with the two pressure measuring ends in the differential pressure transmitter device a through the corresponding pressure guide assemblies c, so that the two remote transmission devices b at different measuring positions can transmit different pressures for the differential pressure transmitter device a.

The submersible differential pressure transmitter of the embodiment illustrated in fig. 1, the structures, shapes and arrangements between the two remote transmitters b and the two pressure guide assemblies c may be the same, and thus the structures and operation principles of the submersible differential pressure transmitter illustrated in fig. 1 will now be described only by describing one of the remote transmitters b and one of the pressure guide assemblies c.

The differential pressure transmitter device a comprises a shell part with a closed cavity, and a differential pressure transmitter 7 and a circuit assembly 9 which are positioned in the closed cavity of the shell part. The case member is made of a pressure-resistant material, for example, a titanium metal material such as a titanium alloy. The shell component made of the material is not only pressure-resistant, but also corrosion-resistant, can be applied to the field of deep sea and deepwater operation, and has long service life.

In some embodiments of the utility model, the housing component comprises a barrel portion 8, a base plate 1. The cylindrical portion 8 and the substrate 1 may be made of a titanium metal material, such as a titanium alloy. One end of the cylinder part 8 is open and is provided with a cavity, the base plate 1 and the open end of the cylinder part 8 are fixed together, and the base plate and the cylinder part together enclose a shell component with a closed cavity. The cylindrical portion 8 and the substrate 1 may be connected by welding to improve the connection strength, the compressive strength, and the sealing performance between the cylindrical portion 8 and the substrate 1.

In an alternative embodiment of the present invention, the base plate 1 is provided with an annular groove corresponding to the open end of the barrel portion 8, and the open end of the base plate 1 is positioned in the annular groove and fixed and sealed by welding.

In an alternative embodiment of the utility model, a suitably shaped barrel portion 8 may be selected. For example, the cylindrical body 8 having a cylindrical, semicircular or circular-arc cross section is selected to further improve the pressure resistance of the housing member.

With continued reference to fig. 1, differential pressure transmitter 7 has two pressure sensing terminals and outputs a corresponding signal using the differential pressure between its two pressure sensing terminals. Differential pressure transmitter 7 may alternatively be a single crystal silicon differential pressure sensor core or other differential pressure sensors known to those skilled in the art. The differential pressure transmitter 7 is fixed on the base plate 1 at one side of the closed cavity of the shell component. Wherein, differential pressure transmitter 7 can be assembled through the designed supporting seat. For example, the differential pressure transmitter 7 and the support base are separate parts and are assembled by means of assembly; it is also possible that the differential pressure transmitter 7 and the support base are constructed as an integral structure, which is not particularly limited herein.

In an alternative embodiment of the utility model, the support base can be locked to the base plate 1 by means of bolts or screws 12. Blind holes may be provided in the base plate 1 for locking with corresponding bolts or screws 12, for example.

The pressure guide assembly c is used for communicating the differential pressure transmitter 7 and the remote transmission device b, and is configured to transmit the pressure detected by the remote transmission device b to the pressure measuring end of the differential pressure transmitter 7. Referring to fig. 1, the pressure guide assembly c includes a fluid guide tube 4, and the fluid guide tube 4 is a pressure transmitting member, for example, a fluid such as silicon oil 5 flows in the fluid guide tube 4 to transmit the external pressure detected by the remote transmitting device b to a pressure measuring end of the differential pressure transmitter 7.

In some embodiments of the present invention, the fluid guide tube 4 may be a capillary tube, such as a 316L stainless steel capillary tube. The fluid guide tube 4 includes connection ends at both ends thereof, respectively, and a middle region between the connection ends thereof. Two ends of the fluid guide pipe 4 are respectively communicated with a pressure measuring end of the differential pressure transmitter 7 and a remote transmission device.

Referring to fig. 2, an end of the fluid guide tube 4 for communicating with the differential pressure transmitter 7 is referred to as a first connection end 41, an end for communicating with the remote transmission device b is referred to as a second connection end 42, and an area of the fluid guide tube 4 between the first connection end 41 and the second connection end 42 is referred to as a middle area 40. The length of the intermediate region 40 depends on the distance between the differential pressure transmitter 7 and the remote transmission b, so that the differential pressure transmitter 7 can acquire a fluid pressure signal by means of the remote transmission b even if it is located at a distance from the measurement site (the specific distance can be selected according to the actual application).

With continued reference to fig. 1 and 2, the pressure directing assembly c includes a fixed tube 6 at a first connection end 41 of the fluid directing tube 4, the first connection end 41 of the fluid directing tube 4 passing through the conduit of the fixed tube 6 and sealing the fluid directing tube 4 and the fixed tube 6 together.

In some embodiments of the present invention, the outer diameter of the fluid guide tube 4 is designed to be approximately equal to the inner diameter of the fixed tube 6, and the gap between the first connection end 41 of the fluid guide tube 4 and the fixed tube 6 can be controlled within a reasonable range after the two ends pass through the fixed tube 6. Further, the sealing may be performed by welding or other means known to those skilled in the art, such as using a sealant.

In some other alternative embodiments of the utility model, the fluid conducting tube 4 is aligned with and welded to a welding lip (not shown) provided on the end face of the fixed tube 6. For example, a welding lip is provided at the end face position of the fixed pipe 6, the first connection end 41 of the fluid guide pipe 4 is aligned with the welding lip on the fixed pipe 6 from the back of the fixed pipe 6, and the first connection end 41 of the fluid guide pipe 4 and the end face position of the fixed pipe 6 are welded and sealed together by welding. Through such structural design, both can guarantee the connection between fixed pipe 6 and the fluid guide pipe 4, have also realized the sealed between fixed pipe 6 and the fluid guide pipe 4.

In some embodiments of the present invention, to further improve the sealing and corrosion protection of the pressure guide assembly c, a corrosion protection sleeve 3 is sleeved over the outer wall of the intermediate region 40 of the fluid guide tube 4. The corrosion-resistant casing 3 may be made of a corrosion-resistant material known to those skilled in the art, for example, a seawater corrosion-resistant material, and is selected according to the actual application.

The middle area 40 of the fluid guide pipe 4 is sleeved in the anticorrosion sleeve 3, and the end part of the anticorrosion sleeve 3 extends from the middle area 40 of the fluid guide pipe 4 to the direction of the fixed pipe 6 until the end part is connected with the outer wall of the fixed pipe 6, namely the end area of the anticorrosion sleeve 3 is sleeved on the outer wall of the fixed pipe 6. By adopting the structure design, on one hand, the connection between the anti-corrosion sleeve 3 and the fixed pipe 6 and the fluid guide pipe 4 is realized, and on the other hand, the sealing between the anti-corrosion sleeve 3 and the fixed pipe 6 and the fluid guide pipe 4 can also be realized. The corrosion to the fluid guide pipe 4 in seawater, fresh water or other application scenes can be avoided through the anti-corrosion sleeve 3, and the service life is prolonged.

In an alternative embodiment of the utility model, the fixed pipe 6 is provided with threads at least in the area in contact with the corrosion protection sleeve 3, and the end of the corrosion protection sleeve 3 is locked to the fixed pipe 6 by a nut 2 cooperating with the threads.

With continued reference to fig. 2, the fixed pipe 6 is provided with a thread (not shown) at least on one side thereof adjacent to the middle area 40 of the fluid guide pipe 4, and the end of the corrosion-resistant sleeve 3 is at least sleeved on the thread position of the fixed pipe 6, so that after the nut 2 and the thread on the fixed pipe 6 are locked together, the corrosion-resistant sleeve 3 is squeezed between the fixed pipe 6 and the nut 2, thereby realizing the connection and sealing between the corrosion-resistant sleeve 3 and the fixed pipe 6.

In some alternative embodiments of the utility model, the nut 2 is a conical nut, and correspondingly, the end of the fixing tube 6 has a shape adapted to the conical nut. Referring to fig. 2, the end of the fixing tube 6 is configured in a conical shape, so that the cone nut and the end of the fixing tube 6 can be locked more tightly in such a conical surface locking manner, thereby improving the strength of the connection between the components and enhancing the sealing performance between the components.

In some embodiments of the present invention, the fixing tube 6 and/or the nut 2 may be made of a pressure-resistant and corrosion-resistant material, such as titanium material.

The structural design of the position of the first connecting end 41 of the fluid guide pipe is basically consistent with that of the position of the second connecting end 42, namely, a fixing pipe 6 with basically the same structure is arranged at the position of the second connecting end 42, and the other end of the corrosion-resistant sleeve 3 is also locked on the outer wall of the fixing pipe 6 at the end through the nut 2, and is not described in detail herein.

Fluid conducting pipe first connection 41 needs to pass through the barrel portion 8 to communicate with the differential pressure transmitter 7 and second connection 42 needs to communicate with remote transmission a. Therefore, the structural design of the fixed pipe 6 can not only protect the fluid guide pipe 4, but also play a role in strengthening the support for the conduction of the two connecting ends of the fluid guide pipe 4, and ensure the structural strength of the connecting position.

Referring to fig. 1, a first connection end 41 of the fluid guide pipe 4 needs to pass through the cylinder portion 8 and be connected and conducted with the differential pressure transmitter 7 located in the sealed cavity, so that a hole position needs to be correspondingly arranged on the cylinder portion 8. Through which the stationary tube 6 at the first connection end 41 passes in order to connect the end of the fluid conducting tube inside the stationary tube 6 to the pressure sensing end of the differential pressure transmitter 7. Further, a sealing process is required between the hole sites of the fixed pipe 6 and the cylindrical body 8. For example, the positions of the hole positions of the fixed pipe 6 and the barrel part 8 can be welded and sealed together by welding, so that the interior of the shell part is completely sealed, and leakage is avoided during deep sea or deep water operation.

It should be noted that the differential pressure transmitter 7 has two pressure measuring terminals, and therefore, two pressure guide assemblies c are provided to pass through the cylindrical body portion 8 and communicate with the corresponding pressure measuring terminals of the differential pressure transmitter 7. In an alternative embodiment of the present invention, two pressure measuring terminals are symmetrically disposed on two sides of the differential pressure transmitter 7, and correspondingly, the fixing pipes 6 of the two pressure guiding assemblies c adjacent to the side of the cylinder 8 (the first connection terminal 41 side) are symmetrically disposed on two opposite sides of the cylinder 8, so as to ensure the symmetrical design of the overall structure of the remote differential pressure transmitter, and further improve the pressure resistance of the remote differential pressure transmitter.

Referring to fig. 1, the second connection end 42 of the fluid guide tube 4 is communicated with the remote transmitting device b, and the pressure detected by the remote transmitting device b is transmitted to the pressure measuring end of the differential pressure transmitter 7 through the pressure guide assembly c, specifically, the pressure detected by the remote transmitting device b is transmitted through the fluid change in the fluid guide tube 4. The two remote transmission devices b respectively detect the pressures at different positions, so that specific parameters capable of representing the pressures can be output according to the pressure difference of the two pressure measuring ends of the differential pressure transmitter 7.

The remote-transmission differential pressure transmitter of the utility model further comprises a circuit assembly 9 positioned in the closed cavity of the shell part, and the circuit assembly 9 is configured to process an electric signal output by the differential pressure transmitter 7.

In some embodiments of the present invention, the circuit assembly 9 can be a circuit board assembly or the like, and the electrical signal output by the differential pressure transmitter 7 is processed by the circuit assembly 9, including but not limited to amplification, noise reduction, conversion, and the like. Or based on the requirement of deep sea transmission, the signals processed by the circuit assembly 9 are easier to be transmitted in a long distance, for example, the transmission efficiency is high, the attenuation is less, the anti-interference capability is strong, and the like.

In some embodiments of the present invention, the circuit components 9 may be disposed on the substrate 1, for example, by screwing or other means known to those skilled in the art, if the design allows the substrate 1 to occupy an area. The output of differential pressure transmitter 7 and circuit assembly 9 can be connected by conventional means, such as by electrical signal conduction through metal wires.

In other embodiments of the utility model, circuit assembly 9 can be coupled to differential pressure transmitter 7. For example, the circuit assembly 9 can be connected to the differential pressure transmitter 7 on the side away from the base plate 1 by a bracket to reduce the area of the base plate 1 occupied by the circuit assembly 9, in other words, such a structural design can reduce the lateral dimension of the cylinder 8, i.e., reduce the inner diameter of the cylinder 8, which facilitates the pressure-resistant design of the housing member.

In some embodiments of the present invention, circuit assembly 9 is comprised of a circuit board and a protective cover, which can be a metal shell that can be welded together with differential pressure transmitter 7. The upper end of the protective cover is provided with two wire outlet terminals so as to output the processed electric signals.

The remote transmission differential pressure transmitter comprises an electric connector 10, wherein the electric connector 10 is hermetically fixed on the shell component and is configured to be in signal conduction with the circuit component 9 so as to lead out an electric signal output by the differential pressure transmitter 7 after processing.

Referring to fig. 1, an electrical connector 10 is mounted on the outside of the barrel 8, for example, in the middle region of the barrel 8 on the side opposite to the substrate 1. A through hole is provided at a corresponding position of the cylindrical body portion 8 so that one end of the electrical connector 10 can be conducted with the connection terminal 11 of the circuit assembly 9 through the through hole. Fig. 1 shows that the electrical connector 10 is electrically connected to the connection terminal 11 of the circuit assembly 9 through a wire, which may also be a manner known to those skilled in the art and will not be described herein.

The electrical connector 10 is sealed with the barrel portion 8. In an alternative embodiment of the utility model, the fixing and sealing may be performed by welding. Further, a sealing material, such as a sealing rubber sleeve, may be added at the position where the electrical connector 10 is matched with the through hole of the barrel 8 to ensure the sealing performance between the electrical connector 10 and the barrel 8.

In an alternative embodiment of the present invention, the other end of the electrical connector 10 can be a plug structure, which is connected to a transmission line in a plug manner to transmit the electrical signal of the remote differential pressure transmitter to the outside. In order to prevent water leakage, sealing treatment is required between the connectors.

In some embodiments of the present invention, electrical connector 10 can not only transmit electrical signals of the remote differential pressure transmitter to the outside, but also power the remote differential pressure transmitter, for example, power circuit assembly 9 and differential pressure transmitter 7, so that circuit assembly 9 can process signals output by differential pressure transmitter 7.

By the technical scheme, the pressure-resistant remote transmission differential pressure transmitter with good sealing performance is provided, so that the pressure-resistant remote transmission differential pressure transmitter can be applied to operation platforms in deep sea, deep water and the like. Compared with the traditional remote transmitter, the signal output by the differential pressure transmitter 7 is processed by the circuit component 9 and then transmitted by the electric connector 10, the detection distance is not limited by the length of the pressure guide component c any more, the efficiency and the precision of the pressure transmission of the pressure guide component c are ensured, and the deep sea and deep water detection becomes possible.

The remote transmission device b of the present invention may adopt an existing remote transmission device structure, such as detecting an external pressure through a diaphragm.

In one embodiment of the utility model, the remote transmission device b is configured with a pressure measuring flange 14, and a fluid passage 18 is provided inside the pressure measuring flange 14. One end of the fluid channel extends and penetrates to the detection end face of the pressure measuring flange 14, and the other end of the fluid channel extends to the interface position of the pressure measuring flange 14 and is used for being communicated with the pressure guide assembly c.

Referring to fig. 1, a plurality of screw holes 15 are provided on a flange of the pressure measuring flange 14 to fix the pressure measuring flange 14 in a work platform or other desired scene. The pressure measuring flange 14 has a detection end face, and a pressure diaphragm 17 is arranged on the detection end face of the pressure measuring flange 14, and the pressure diaphragm 17 is a main component of the remote transmission device b for detecting the external pressure. The pressure membrane 17 may be fixed to the detection end face of the pressure measuring flange 14 by welding to cover the fluid passage 18 of the pressure measuring flange 14. When the pressure diaphragm 17 is deformed by sensing the external pressure change, the flow direction of the fluid in the fluid passage 18 is affected, so that the external pressure is transmitted to the pressure measuring end of the differential pressure transmitter 7 through the fluid passage 18 and the pressure guide assembly c.

In an alternative embodiment of the utility model, the side of the pressure measuring flange 14 opposite to its detection end face is also provided with an oil filling hole 13 communicating with the fluid passage 18. Under vacuum, a suitable fluid, such as silicone oil 5, can be injected into the fluid passage 18 through the oil hole 13.

In an alternative embodiment of the utility model, a protective cover 16 is also provided in order to protect the pressure membrane 17. The protective cap 16 is made of, for example, teflon, and is screwed to the outer circumference of the pressure measuring flange 14 on the detection end surface side. An inner cavity is formed between the protective cover 16 and the sensing end face of the pressure measuring flange 14 to accommodate the pressure diaphragm 17 therein. The protective cover 16 can function to protect the pressure diaphragm 17 without restricting the operation of the pressure diaphragm 17.

The protection cover 16 is provided with a micropore structure 20 for communicating the inner cavity with the outside, and the pressure diaphragm 17 can be communicated with the outside through the micropore structure 20 so as to detect the pressure change of the outside and protect the pressure diaphragm 17 from impact or abrasion of sand or other particles.

In some embodiments of the present invention, the pressure diaphragm 17 and/or the pressure measuring flange 14 may be made of titanium to prevent corrosion from seawater.

The remote transmitting device for a pressure transmitter, the remote transmitting pressure transmitter and the measuring system including the remote transmitting pressure transmitter according to the present invention have been explained in detail above by way of examples only, which are provided only for illustrating the principle of the present invention and the embodiments thereof, and not for limiting the present invention, and those skilled in the art can make various modifications and improvements without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to be included within the scope of this invention and defined in the claims of this application.

Claims (15)

1. Submersible differential pressure transmitter comprising at least one differential pressure transmitter device (a), at least two remote transmission devices (b) and at least two pressure directing assemblies (c) for transmitting pressure from a remote transmission device to a differential pressure transmitter device, characterized in that the differential pressure transmitter device (a) comprises:

a housing component that is pressure resistant and has a closed cavity;

the differential pressure transmitter (7) is fixed in the closed cavity of the shell component and is provided with two pressure measuring ends; the two pressure guide assemblies are configured to respectively transmit the pressures detected by the two remote transmission devices to two pressure measuring ends of the differential pressure transmitter; the pressure guide assembly is arranged to penetrate through the shell component and is fixedly and hermetically connected with the shell component;

a circuit assembly (9) secured within the sealed cavity of the housing component and configured for processing an electrical signal output by the differential pressure transmitter;

an electrical connector (10) sealingly secured to the housing member, the electrical connector configured to be in signal communication with the circuit assembly for drawing electrical signals output by the processed differential pressure transmitter.

2. The submersible differential pressure remote transmitter of claim 1, wherein the pressure directing assembly (c) comprises:

a fluid conducting tube (4) comprising connection ends at its two end regions and a middle region between its two connection ends; two ends of the fluid guide pipe are respectively communicated with the differential pressure transmitter (7) and the remote transmission device;

two fixed pipes (6) are arranged at the connecting end positions of the fluid guide pipes, the connecting ends of the fluid guide pipes penetrate through the fixed pipes and are sealed with the fluid guide pipes at the end positions of the fixed pipes.

3. Submersible differential pressure transmitter according to claim 2, characterized in that the fluid guide tube (4) is aligned with a welding lip provided on the end face of the fixed tube (6) and is welded and fixed together.

4. Submersible differential pressure transmitter according to claim 2, characterized in that the pressure guiding assembly comprises a corrosion-resistant sleeve (3) through which a middle region (40) of the fluid guiding tube (4) passes; the end part of the anti-corrosion sleeve (3) extends to be connected with the outer wall of the fixed pipe (6).

5. Submersible differential pressure transmitter according to claim 4, characterized in that the stationary pipe (6) is provided with a thread at least in the area of contact with the corrosion protection sleeve, the corrosion protection sleeve (3) being locked to the stationary pipe (6) by means of a nut (2) cooperating with the thread.

6. Submersible differential pressure transmitter according to claim 5, characterized in that the nut (2) is a conical nut, the corresponding area of the fixing tube (6) having a shape adapted to the conical nut.

7. The submersible differential pressure transmitter of claim 2, wherein the mounting tube of the two pressure directing assemblies adjacent the side of the housing member passes through an aperture provided in the housing member and is sealingly and fixedly connected to the housing member.

8. Submersible differential pressure transmitter according to claim 7, characterized in that the fixing tube (6) is sealingly fixed with the hole site of the housing part by means of welding.

9. Submersible differential pressure remote transmitter according to any of claims 1 to 8, characterized in that the housing part comprises a base plate (1) and a barrel part (8) enclosing a closed volume with the base plate; the barrel part (8) and the substrate (1) are sealed and fixed together in a welding mode.

10. The submersible differential pressure remote transmitter according to claim 9, wherein the cylindrical body (8) is a cup-shaped member made of titanium metal, and the substrate (1) is a flat plate-shaped member made of titanium metal.

11. Submersible differential pressure transmitter according to claim 9, characterized in that the differential pressure transmitter (7) is fixed with the base plate (1); the circuit assembly (9) is connected to the differential pressure transmitter (7) through a bracket.

12. Submersible differential pressure transmitter according to claim 9, characterized in that one end of the electrical connector (10) passes through a through hole provided in the cylinder (8) and is in communication with a terminal of the circuit assembly (9), and the electrical connector (10) is fixed and sealed outside the cylinder (8) by means of soldering.

13. Submersible differential pressure transmitter according to any of claims 1 to 8, characterized in that the remote transmission means (b) is configured with a pressure measuring flange (14), in which a fluid channel (18) is provided, which extends and penetrates to the detection end face of the pressure measuring flange; a pressure diaphragm (17) is further arranged on the detection end face of the pressure measuring flange, and the pressure diaphragm (17) is configured to transmit pressure into the fluid channel; the pressure guide assembly (c) is in communication with a fluid channel in the pressure measuring flange.

14. Submersible differential pressure telemetric transmitter according to claim 13, characterized in that a protective cover (16) is provided outside the detection end face, the pressure diaphragm (17) being located in an inner cavity enclosed by the protective cover and a pressure measuring flange; and a micropore structure (20) for communicating the inner cavity with the outside is arranged on the protective cover (16).

15. A measurement system, characterized in that at least one submersible differential pressure telemetric transmitter according to any of claims 1 to 14 is provided in the measurement system.

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