An underwater flow meter with a recyclable electronic compartment

Abstract

The present invention discloses an underwater flowmeter with a recyclable electronic bin, comprising a flowmeter body for fluid measurement and an electronic bin module for data acquisition and transmission, the two being independently arranged, the flowmeter body being provided with a multiphase flow metering device, a temperature measuring device and a pressure measuring device, and a line collection bin module, the electronic bin module comprising a recyclable electronic bin, the measurement signal output ends of each measuring device being respectively connected to the line collection bin module via cables, the line collection bin module being connected to the recyclable electronic bin via a measurement signal electric flying wire, so as to transmit the measurement signal to the recyclable electronic bin. The beneficial effects of the present invention: the flowmeter body and the recyclable electronic bin are independent of each other, the measurement signal output cables of each measuring device on the flowmeter body are uniformly connected to the line collection bin, and connected to the recyclable electronic bin via a measurement signal electric flying wire, so as to facilitate signal conduction and the recovery of the recyclable electronic bin.

Description

Technical Field

[0001] The invention belongs to the field of flow meters, and in particular relates to an underwater flow meter with a recoverable electronic compartment. Background Art

[0002] The underwater multiphase flowmeter is an emerging device for measuring the flow of marine oil and gas wells. It is in the process of continuous development and is particularly suitable for measuring the flow of remote wells. Unlike the multiphase flowmeters used on land or drilling platforms, underwater multiphase flowmeters face extremely harsh environments. They must not only meet basic measurement requirements, but also be able to withstand high pressure and corrosive underwater environments. The underwater multiphase flowmeter is installed at the underwater manifold for measurement, and then the signal data is transmitted to the platform. It generally includes a measurement module and an electronic warehouse module for signal processing, storage and transmission. The measurement module includes a metering flow channel, a temperature and pressure measurement component arranged on the metering flow channel, and a multiphase flow measurement component composed of a radioactive source and a detector. Patent document CN106706047A discloses an underwater multiphase flowmeter based on Ba133, in which the electronic warehouse component is connected to the detector component in a waterproof and sealed manner, and the overall structure is compact. However, since the underwater flowmeter is relatively expensive, exploring the recyclable technology of the underwater flowmeter has important economic value. The electronic compartment module is an important component of the underwater flowmeter and can be fully reused. The recovery of the electronic compartment module is of great significance and is also the research basis for the subsequent full flowmeter recovery technology. Summary of the invention

[0003] In view of this, the present invention provides an underwater flow meter with a recoverable electronic compartment.

[0004] The technical solution is as follows:

[0005] An underwater flow meter with a recyclable electronic compartment comprises a flow meter body for fluid measurement and an electronic compartment module for data acquisition and transmission. The flow meter body is provided with a multiphase flow metering device, a temperature measuring device and a pressure measuring device. The key point is that:

[0006] The flow meter body and the electronic compartment module are independently arranged, and the electronic compartment module includes a recyclable electronic compartment;

[0007] A line collection bin module is provided on the flow meter body, and the measurement signal output ends of the multiphase flow metering device, the temperature measuring device and the pressure measuring device are respectively connected to the line collection bin module through cables. The line collection bin module is connected to the recyclable electronic bin through a measurement signal electric flying lead to transmit the measurement signal to the recyclable electronic bin, and the measurement signal electric flying lead is connected to the recyclable electronic bin by a plug-in docking joint.

[0008] The advantage of adopting the above design is that the flow meter body and the recyclable electronic warehouse are independent of each other, and the measurement signal output cables of each measuring device on the flow meter body are uniformly connected to the line collection warehouse, and connected to the recyclable electronic warehouse through a measurement signal electrical flying wire, which facilitates signal transmission and recovery of the recyclable electronic warehouse.

[0009] As a preferred technical solution, the electronic warehouse module further includes an electronic warehouse fixing barrel for fixing on the underwater manifold, the electronic warehouse fixing barrel includes a vertically arranged cylinder, the upper end of the cylinder is open, and the lower end is provided with an annular barrel bottom;

[0010] The recyclable electronic bin is arranged in the electronic bin fixed barrel, and a guide mechanism is arranged between the outer wall of the recyclable electronic bin and the electronic bin fixed barrel;

[0011] A T-shaped handle is provided on the upper end of the recyclable electronic bin.

[0012] The above design has the advantage that the electronic bin fixing barrel is fixedly installed on the underwater manifold, providing a fixing point for the underwater installation of the recyclable electronic bin, and has a simple structure and is easy to install with the recyclable electronic bin.

[0013] As a preferred technical solution, the recyclable electronic warehouse is provided with a signal input socket and a signal output socket, the signal input socket is used to connect with the connector of the measurement signal electric flying wire, and the signal output socket is used to connect the SCM electric flying wire connector;

[0014] The electronic compartment fixing barrel is also connected to two plug fixing seats, and socket protection caps are respectively inserted into the two plug fixing seats.

[0015] With the above design, the recyclable electronic compartment can be quickly connected and disconnected from the upstream flow meter body and the downstream data communication module, and a socket protection cap is provided to protect the signal input socket and the signal output socket when the recyclable electronic compartment is disconnected.

[0016] As a preferred technical solution, the above-mentioned guide mechanism includes a bell mouth connected to the upper end of the cylinder, the bell mouth is provided with a guide notch parallel to the axial direction of the cylinder, the guide notch extends upward to the upper edge of the bell mouth, and the outer wall of the recyclable electronic warehouse is provided with a guide plate, which is located in the guide notch.

[0017] With the above design, the bell mouth facilitates the docking of the recyclable electronic bin with the electronic bin fixed barrel, and the guide plate and the guide notch cooperate for guiding.

[0018] As a preferred technical solution, the above-mentioned line collection bin module includes a line collection bin, which is connected to the flow meter body, and a line collection connector assembly is provided on the line collection bin. The signal input end of the line collection connector assembly is connected to the measurement signal output end of the multiphase flow metering device, the temperature measuring device and the pressure measuring device through a cable, and the signal output end of the line collection connector assembly is connected to the measurement signal electric flying lead.

[0019] With the above design, the signals of various measuring devices are connected through the same cable, which facilitates the transmission of signals to the recyclable electronic warehouse and facilitates the disconnection of the line collection warehouse from the recyclable electronic warehouse.

[0020] As a preferred technical solution, the flow meter body comprises a flow meter tube body, and a fluid metering channel is arranged in the flow meter tube body;

[0021] The multiphase flow metering device comprises a radiation source assembly and a detector assembly, wherein the radiation source assembly and the detector assembly are opposite to each other and are located on both sides of the center line of the fluid metering channel;

[0022] A plane area parallel to the axis of the fluid metering channel is provided on the outer side wall of the fluid metering channel, a probe installation cavity is provided in the flow meter tube body, the probe installation cavity is perpendicular to the plane area, a probe installation flange is connected to the plane area, the probe installation flange is fixedly connected to the hollow cylindrical wire collecting bin, a probe installation through hole is provided on the side wall of the wire collecting bin corresponding to the inner hole of the probe installation flange, the probe installation through hole is communicated with the probe installation flange and the probe installation cavity;

[0023] The detector assembly comprises a columnar probe, a front end sealing assembly and a probe cover assembly, wherein the probe is located in the probe mounting flange, the front end of the probe is located in the probe mounting cavity, the probe is sealed and connected to the probe mounting cavity through the front end sealing assembly, the rear end of the probe is located in the probe mounting through hole, a probe inlet hole is provided on the line collection bin directly facing the rear end of the probe, and the probe inlet hole is closed by the probe cover assembly, the probe cover assembly abuts against the rear end of the probe so that its front end abuts against the front end sealing assembly, thereby fixing the probe;

[0024] A probe plug is provided at the rear end of the probe, and the probe plug is connected to the line collection connector assembly through a cable.

[0025] The above design avoids the need to reserve an installation position on the flow meter tube body when the line collection bin is directly connected to the flow meter tube body. Instead, the line collection bin is connected to the probe mounting flange, which has a compact structure, facilitates the cable connection between the probe and the line collection bin, and facilitates the installation of the probe through the probe inlet hole.

[0026] As a preferred technical solution, the probe inlet hole is a stepped hole, the inner end of the probe inlet hole is a smaller hole, and the outer end is a larger hole;

[0027] The probe cover assembly includes a probe cover, which includes a large diameter section, a middle diameter section and a small diameter section whose outer diameters decrease in sequence from the outside to the inside, and the three are connected in sequence coaxially to form the probe cover, the large diameter section and the middle diameter section are adapted to and fit with the corresponding side walls of the probe inlet hole, the inner end surface of the large diameter section is against the step of the probe inlet hole, and the large diameter section is connected to the bottom wall of the larger hole of the probe inlet hole by bolts;

[0028] The small diameter section of the probe cover extends into the wire collection bin and faces the rear end of the probe, a guide sleeve is connected between the small diameter section and the rear end of the probe, one end of the guide sleeve is sleeved on the small diameter section, and the other end is sleeved on the probe and embedded in the probe installation hole, and an abutting step is provided on the inner wall of one end of the guide sleeve corresponding to the probe, and the abutting step abuts against the rear end of the probe;

[0029] The probe plug is arranged at the rear end of the probe, and the probe plug is located in the guide sleeve, and a wire passing hole is arranged on the guide sleeve near the probe plug;

[0030] A waterproof sealing structure is provided between the probe cover and the probe inlet.

[0031] With the above design, the probe cover is connected to the side wall of the wire collection bin, and the probe is fixed in place by a guide sleeve. The structure is simple and the installation is convenient. The wire hole design on the guide sleeve facilitates the laying of the cable between the probe plug and the wire collection bin.

[0032] As a preferred technical solution, one end of the wire collection bin is provided with an end step hole, and a flange-type wire collection bin cover is buckled on the end step hole, and the wire collection bin cover is sealed with the end step hole, and the wire collection bin cover is connected to the wire collection bin by bolts;

[0033] The line collection connector assembly includes a core battery fixing seat, a core battery insertion member, an electric flying wire fixing seat and a right-angle terminal;

[0034] The core battery fixing seat is in a cylindrical shape, and is inserted into the line collection compartment cover and sealed therewith, and the electric flying wire fixing seat is also in a cylindrical shape and is sleeved on the core battery fixing seat;

[0035] The core electric penetration chamber is arranged in the electric flying lead fixing seat, the signal input end of the core electric penetration chamber is connected to the probe plug through a cable, the signal output end of the core electric penetration chamber is connected to the right-angle terminal, and the right-angle terminal extends out of the electric flying lead fixing seat and is sealed with it.

[0036] By adopting the above design, the measurement signal output cables of various measuring devices are concentrated into the line collection connector assembly, and the installation structure of various components of the line collection warehouse is compact.

[0037] Compared with the prior art, the present invention has the following beneficial effects: the flow meter body and the recyclable electronic warehouse are independent of each other, the measurement signal output cables of each measuring device on the flow meter body are uniformly connected to the line collection warehouse, and are connected to the recyclable electronic warehouse through a measurement signal electrical flying wire, which facilitates signal conduction and recovery of the recyclable electronic warehouse. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of the present invention;

[0039] Figure 2 It is a structural schematic diagram of a flow meter module;

[0040] Figure 3 It is a schematic diagram of the structure of the flow meter body, the line collection chamber, the radiation source assembly and the detector assembly;

[0041] Figure 4 for Figure 3 Enlarged view of the middle m part;

[0042] Figure 5 It is a structural schematic diagram of a recyclable electronic warehouse;

[0043] Figure 6 It is a schematic diagram of the corrosion-resistant structure of the flow meter tube body;

[0044] Figure 7 for Figure 6 Enlarged view of the middle part;

[0045] Figure 8 This is a schematic diagram of the structure in which the Venturi assembly is installed in the flow meter tube. DETAILED DESCRIPTION

[0046] The present invention is further described below in conjunction with embodiments and drawings.

[0047] like Figure 1 As shown, an underwater flowmeter with a recyclable electronic compartment includes a flowmeter body 100 for fluid measurement and an electronic compartment module 500 for data acquisition, processing and transmission, which are independently arranged. The flowmeter body 100 is provided with a multiphase flow metering device, a temperature measuring device and a pressure measuring device.

[0048] like Figure 2As shown, the flow meter body 100 includes a flow meter tube body 110, and a fluid metering channel 120 is arranged in the flow meter tube body 110. The multiphase flow metering device includes a radiation source assembly 200 and a detector assembly 300, and the radiation source assembly 200 and the detector assembly 300 are opposite to each other and are located on both sides of the center line of the fluid metering channel 120. The temperature measuring device is a temperature differential instrument, and the pressure measuring device is a pressure differential instrument, both of which are connected to the fluid metering channel 120.

[0049] The electronic storage module 500 includes a recyclable electronic storage 520 .

[0050] The flow meter body 100 is provided with a line collection bin module 400, which includes a line collection bin 410, which is connected to the flow meter body 100, and a line collection connector assembly is provided on the line collection bin 410, and the signal input end of the line collection connector assembly is respectively connected to the measurement signal output end of the detector assembly 300, the temperature difference instrument and the pressure difference instrument through a cable, and the signal output end of the line collection connector assembly is connected to the measurement signal electric flying lead. The signal output end of the line collection connector assembly is connected to the recyclable electronic bin 520 through the measurement signal electric flying lead to transmit the measurement signal to the recyclable electronic bin 520, and the measurement signal electric flying lead is connected to the recyclable electronic bin 520 using a plug-in joint.

[0051] like Figure 2 and 3 As shown, a plane area 111 parallel to the axis of the fluid metering channel 120 is provided on the outer wall of the fluid metering channel 120, and a probe mounting cavity 112 is opened in the flow meter tube body 110, and the probe mounting cavity 112 is perpendicular to the plane area 111, and the plane area 111 is connected to a probe mounting flange 330, and the probe mounting flange 330 is fixedly connected to a hollow cylindrical wire collecting bin 410, and a probe mounting through hole is opened on the side wall of the wire collecting bin 410 corresponding to the inner hole of the probe mounting flange 330, and the probe mounting through hole is connected to the probe mounting flange 330 and the probe mounting cavity 112.

[0052] The detector assembly 300 includes a columnar probe 310, a front end closing assembly 320 and a probe cover assembly. The probe 310 is located in the probe mounting flange 330. The front end of the probe 310 is located in the probe mounting cavity 112. The probe 310 is sealed and connected to the probe mounting cavity 112 through the front end closing assembly 320. The rear end of the probe 310 is located in the probe mounting through hole. The line collection bin 410 opposite to the rear end of the probe 310 is provided with a probe inlet hole 411, which is closed by the probe cover assembly. The probe cover assembly abuts against the rear end of the probe 310 to make its front end abut against the front end closing assembly 320, thereby fixing the probe 310.

[0053] The front end sealing component 320 and its connection structure with the probe mounting cavity 112 are prior arts, which are described in detail in patent document CN106706047A and will not be repeated here.

[0054] like Figure 4 As shown, specifically, the probe inlet hole 411 is a stepped hole, the inner end of the probe inlet hole 411 is a smaller hole, and the outer end is a larger hole. The probe cover assembly includes a probe cover 420, which includes a large diameter section, a middle diameter section, and a small diameter section with decreasing outer diameters from the outside to the inside, and the three are connected in sequence coaxially to form the probe cover 420, the large diameter section and the middle diameter section are adapted to and fit the corresponding side walls of the probe inlet hole 411, the inner end face of the large diameter section is against the step of the probe inlet hole 411, and the large diameter section is connected to the bottom wall of the larger hole of the probe inlet hole 411 by bolts.

[0055] The small diameter section of the probe cover 420 extends into the line collection bin 410 and faces the rear end of the probe 310. A guide sleeve 340 is connected between the small diameter section and the rear end of the probe 310. One end of the guide sleeve 340 is sleeved on the small diameter section, and the other end is sleeved on the probe 310 and embedded in the probe installation hole. The inner wall of the guide sleeve 340 corresponding to one end of the probe 310 is provided with abutting steps 341, and the abutting steps 341 abut against the rear end of the probe 310. The guide sleeve 340 is screwed to the outer wall of the probe 310.

[0056] The outer wall of the small diameter section of the probe cover 420 is provided with a strip-shaped blind hole 421, and the strip-shaped blind hole 421 is arranged along the axial direction of the probe cover 420. A limiting bolt 343 is passed through the guide sleeve 340, and the screw head end of the limiting bolt 343 extends into the strip-shaped blind hole 421. The guide sleeve 340 is covered with an insulating sleeve 344, and the insulating sleeve 344 is located at the place where the limiting bolt 343 is passed through the guide sleeve 340.

[0057] A waterproof sealing structure is provided between the probe cover 420 and the probe inlet 411, including a first sealing structure and a second sealing structure. The first sealing structure is an O-ring 450, which is sandwiched between the middle diameter section of the probe cover 420 and the inner wall of the smaller hole of the probe inlet 411. There are two O-rings 450, which are arranged along the axial direction of the probe cover 420.

[0058] The second sealing structure includes an annular gasket 451, which is sleeved on the small diameter section of the probe cover 420. The inner end surface of the middle diameter section of the probe cover 420 is flush with the inner end circumferential area of ​​the probe inlet hole 411 to form a combined arc surface. The annular gasket 451 is sandwiched between the combined arc surface and the guide sleeve 340.

[0059] The probe 310 is provided with a probe plug 311 at the rear end, and the probe plug 311 is located in the guide sleeve 340. The guide sleeve 340 is provided with a waist-shaped wire hole 342 near the probe plug 311. The cable of the probe plug 311 passes through the wire hole 342 and is connected to the wire hub assembly.

[0060] One end of the line collecting bin 410 is provided with an end step hole which is larger on the outside and smaller on the inside. The end step hole is connected to the inner cavity of the line collecting bin 410. A flange-type line collecting bin cover 430 is buckled on the end step hole. The line collecting bin cover 430 is sealed with the end step hole. The line collecting bin cover 430 is connected to the line collecting bin 410 by bolts.

[0061] The line collection connector assembly includes a core electric fixing seat 440, a core electric through-bin component 441, an electric flying lead fixing seat 442 and a right-angle terminal 443. The core electric fixing seat 440 is cylindrical, and is inserted into the line collection bin cover 430 and sealed therewith. The electric flying lead fixing seat 442 is also cylindrical and is sleeved on the core electric fixing seat 440. The electric flying lead fixing seat 442 is provided with the core electric through-bin component 441, and the signal input end of the core electric through-bin component 441 is connected to the probe plug 311 and the measurement signal output end of the temperature difference instrument and the pressure difference instrument through a cable, wherein the signal output cables of the temperature difference instrument and the pressure difference instrument are respectively inserted into the wire tube, the wire tube passes through the side wall of the line collection bin 410 and is sealed therewith, and the inner cavity of the wire tube is connected to the inner cavity of the line collection bin 410. The signal output end of the core electrical penetration component 441 is connected to the right-angle terminal 443, and the right-angle terminal 443 extends out of the electrical flying lead fixing seat 442 and is sealed with it. The right-angle terminal 443 is connected to the measurement signal electrical flying lead to transmit the measurement signals of the temperature difference meter, pressure difference meter and detector assembly 300 to the data acquisition unit of the recyclable electronic warehouse 520.

[0062] like Figure 1and 5 As shown, the electronic warehouse module 500 also includes an electronic warehouse fixing barrel 510 for being fixedly installed on the underwater manifold, and the electronic warehouse fixing barrel 510 includes a vertically arranged cylinder 512, the upper end of which is open, and the lower end is provided with an annular barrel bottom 511. The upper end of the cylinder 512 is fixedly connected to a bell mouth 513 arranged on the same center line, and the bell mouth 513 is provided with a guide notch 514 parallel to the axial direction of the cylinder 512, and the guide notch 514 extends upward to the upper edge of the bell mouth 513.

[0063] The recyclable electronic bin 520 is disposed in the electronic bin fixing barrel 510 , and a guide plate 522 is disposed on the outer wall of the recyclable electronic bin 520 . The guide plate 522 is located in the guide notch 514 , and the guide plate 522 cooperates with the guide notch 514 to form a guide mechanism.

[0064] The recyclable electronic bin 520 includes an electronic bin housing 521, and a buffer pad 523 is provided at the bottom of the electronic bin housing 521. A T-shaped handle is provided at the upper end of the recyclable electronic bin 520.

[0065] A data acquisition and transmission module is arranged inside the electronic compartment housing 521, and the data acquisition and transmission module includes a data acquisition unit and a dual-energy transmitter. A signal input socket and a signal output socket are arranged on the upper end surface of the electronic compartment housing 521, and the signal input socket and the signal output socket are connected to the data acquisition and transmission module. The signal input socket is used to connect to the measurement signal electrical flying lead connector, and the signal output socket is used to connect to the SCM electrical flying lead connector.

[0066] The electronic warehouse fixing barrel 510 is also connected to two plug fixing seats 530, and the two plug fixing seats 530 are respectively provided with removable socket protection caps 540. When the signal input socket and the signal output socket are not connected to the electric flying wire, the two socket protection caps 540 are respectively connected to the signal input socket and the signal output socket to protect them from corrosion.

[0067] When in use, the underwater flowmeter is installed on the underwater pipe network, the electronic warehouse fixing barrel 510 is welded to the periphery of the underwater manifold, the measuring signal electric flying wire connector is inserted into a plug fixing seat 530, and the SCM electric flying wire connector is inserted into another plug fixing seat 530. The recyclable electronic warehouse 520 is placed in a hanging basket together with two socket protection caps 540 and lowered to the bottom of the water. The ROV robot holds the T-shaped handle to put the recyclable electronic warehouse 520 into the electronic warehouse fixing barrel 510, and then the measuring signal electric flying wire connector and the SCM electric flying wire connector are respectively inserted into the signal input socket and the signal output socket, and then the two socket protection caps 540 are respectively inserted into the corresponding plug fixing seats 530, that is, the installation of the recyclable electronic warehouse 520 is completed. When recycling, first remove the two socket protection caps 540 and put them in the hanging basket, then unplug the measuring signal electric flying wire connector and the SCM electric flying wire connector, and insert them into the corresponding plug fixing seats 530, and finally the ROV robot takes out the recyclable electronic warehouse 520 and puts it into the hanging basket for recycling.

[0068] In addition, in order to improve the corrosion resistance of the flow meter and increase its service life, the flow meter body 110 is provided with a corrosion-resistant structure. Figure 6 and 7 As shown, the fluid metering channel 120 includes a liquid inlet section 123 and a venturi section 121 which are arranged and connected to each other according to the fluid flow direction. The liquid inlet section 123 and the venturi section 121 are connected by a channel step surface 122, and a venturi tube assembly is arranged in the venturi section 121. A pressure inlet hole is provided on the tube wall of the fluid metering channel 120 corresponding to the venturi section 121, and the pressure inlet hole is connected to the fluid metering channel 120. The inner wall of the fluid metering channel 120 and the inner wall of the pressure inlet hole are both covered with a continuous corrosion-resistant metal layer 130 by surfacing welding. The corrosion-resistant metal layer 130 extends to the inlet end of the flowmeter tube body 110, and an inlet docking ring 131 is formed on the end face of the inlet end, and an inlet end docking ring groove 132 is provided on the surface of the inlet docking ring 131 facing away from the flowmeter tube body 110. The corrosion-resistant metal layer 130 is welded to the flowmeter tube body 110 as a whole. The material of the flow meter tube body 110 is a first metal, and the material of the corrosion-resistant metal layer 130 is a second metal. The second metal has stronger erosion resistance and corrosion resistance than the first metal.

[0069] like Figure 8As shown, the venturi tube assembly includes a venturi tube 140, which includes a venturi tube body 141, and the outlet end of the venturi tube body 141 is integrally formed with an end flange 142. The outlet end of the flow meter tube body 110 is provided with a notch adapted to the end flange 142, the venturi tube 140 is inserted into the venturi section 121, the inlet end of the venturi tube body 141 abuts against the channel step surface 122, the inlet of the venturi tube body 141 and the liquid inlet section 123 form a continuous equal-diameter flow channel, and the end flange 142 falls into the notch. The venturi tube 140 and the fluid metering channel 120 are sealed and connected. The end flange 142 is connected to the flow meter tube body 110 by bolts to install and fix the venturi tube 140 and the flow meter tube body 110, and the connection method is described in patent document CN106706047A. An outlet end butt-jointing annular groove 143 is formed on the end surface of the end flange 142 facing away from the venturi tube body 141 .

[0070] Specifically, from the inlet to the outlet of the venturi tube 140 , a first sealing structure 151 , a second sealing structure 152 , a third sealing structure 153 and a flange sealing structure are distributed between the outer wall of the venturi tube 140 and the inner wall of the fluid metering channel 120 .

[0071] The first sealing structure 151 is close to the inlet end of the venturi tube 140 , and the second sealing structure 152 and the third sealing structure 153 are located outside the two ends of the throat of the venturi tube 140 .

[0072] A first annular cavity 157 and a second annular cavity 158 are further provided between the outer wall of the venturi tube 140 and the inner wall of the fluid metering channel 120, wherein the first annular cavity 157 is located between the first sealing structure 151 and the second sealing structure 152, and the first annular cavity 157 corresponds to the inlet of the inner cavity of the venturi tube 140. The second annular cavity 158 is located between the second sealing structure 152 and the third sealing structure 153, and the second annular cavity 158 corresponds to the throat of the inner cavity of the venturi tube 140.

[0073] The pressure-introducing holes include a low-pressure pressure measuring hole 102 and a high-pressure pressure measuring hole 101, wherein the low-pressure pressure measuring hole 102 is located on the wall of the flow meter tube body 110 corresponding to the first annular cavity 157, and the low-pressure pressure measuring hole 102 is communicated with the first annular cavity 157, and a plurality of low-pressure pressure measuring holes 102 are distributed around the first annular cavity 157. The high-pressure pressure measuring hole 101 is located on the wall of the flow meter tube body 110 corresponding to the second annular cavity 158, and the high-pressure pressure measuring hole 101 is communicated with the second annular cavity 158, and a plurality of high-pressure pressure measuring holes 101 are distributed around the second annular cavity 158.

[0074] The flange sealing structure includes a fourth sealing structure 154 and a fifth sealing structure 155, wherein the fifth sealing structure 155 is located between the connection between the venturi tube body 141 and the end flange 142 and the connection between the venturi section 121 and the recess. The fourth sealing structure 154 is located between the fifth sealing structure 155 and the third sealing structure 153 and is close to the fourth sealing structure 154.

[0075] The specific structure of the sealing structure between the venturi tube 140 and the fluid metering channel 120 and the arrangement of the first annular cavity 157 and the second annular cavity 158 can refer to the arrangement of the flow meter described in patent document CN106706047A.

[0076] To ensure the effect, the surfacing thickness of the corrosion-resistant metal layer 130 and the inlet butt ring 131 is not less than 3 mm. The first metal may be carbon steel, and the second metal may be a nickel-based alloy, such as grade F625 alloy.

[0077] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. An underwater flow meter with a recyclable electronic compartment, comprising a flow meter body (100) for fluid measurement and an electronic compartment module (500) for data acquisition and transmission, wherein the flow meter body (100) is provided with a multiphase flow metering device, a temperature measuring device and a pressure measuring device, and characterized in that: The flow meter body (100) and the electronic compartment module (500) are independently arranged, and the electronic compartment module (500) comprises a recyclable electronic compartment (520); The flow meter body (100) is provided with a line collection bin module (400), the measurement signal output ends of the multiphase flow metering device, the temperature measurement device and the pressure measurement device are respectively connected to the line collection bin module (400) via cables, the line collection bin module (400) is connected to the recyclable electronic bin (520) via a measurement signal electric flying lead, so as to transmit the measurement signal to the recyclable electronic bin (520), and the measurement signal electric flying lead is connected to the recyclable electronic bin (520) via a plug-in type docking connector; The electronic warehouse module (500) further comprises an electronic warehouse fixing barrel (510) for being fixedly mounted on the underwater manifold, the electronic warehouse fixing barrel (510) comprising a vertically arranged cylinder (512), the upper end of the cylinder (512) being open, and the lower end being provided with an annular barrel bottom (511); The recyclable electronic bin (520) is arranged in the electronic bin fixed barrel (510), and a guide mechanism is arranged between the outer wall of the recyclable electronic bin (520) and the electronic bin fixed barrel (510); The recyclable electronic bin (520) is provided with a T-shaped handle at the upper end; The line collection bin module (400) comprises a line collection bin (410), the line collection bin (410) is connected to the flow meter body (100), a line collection connector assembly is arranged on the line collection bin (410), a signal input end of the line collection connector assembly is connected to the measurement signal output ends of the multiphase flow metering device, the temperature measuring device and the pressure measuring device via a cable, and a signal output end of the line collection connector assembly is connected to the measurement signal electric flying lead; The flow meter body (100) comprises a flow meter tube body (110), and a fluid metering channel (120) is arranged in the flow meter tube body (110); The multiphase flow metering device comprises a radiation source assembly (200) and a detector assembly (300), wherein the radiation source assembly (200) and the detector assembly (300) are opposite to each other and are located on both sides of the center line of the fluid metering channel (120); A plane area (111) parallel to the axis of the fluid metering channel (120) is provided on the outer wall of the fluid metering channel (120); a probe mounting cavity (112) is provided in the flow meter tube body (110); the probe mounting cavity (112) is perpendicular to the plane area (111); the plane area (111) is connected to a probe mounting flange (330); the probe mounting flange (330) is fixedly connected to the hollow cylindrical wire collecting bin (410); a probe mounting through hole is provided on the side wall of the wire collecting bin (410) corresponding to the inner hole of the probe mounting flange (330); the probe mounting through hole is connected to the probe mounting flange (330) and the probe mounting cavity (112); The detector assembly (300) comprises a columnar probe (310), a front end sealing assembly (320) and a probe cover assembly; the probe (310) is located in the probe mounting flange (330); the front end of the probe (310) is located in the probe mounting cavity (112); the probe (310) is sealed and connected to the probe mounting cavity (112) via the front end sealing assembly (320); the rear end of the probe (310) is located in the probe mounting through hole; a probe inlet hole (411) is provided on the line collection bin (410) directly facing the rear end of the probe (310); the probe inlet hole (411) is closed by the probe cover assembly; the probe cover assembly abuts against the rear end of the probe (310) so that its front end abuts against the front end sealing assembly (320), thereby fixing the probe (310); A probe plug (311) is provided at the rear end of the probe (310), and the probe plug (311) is connected to the line collection connector assembly via a cable; The probe inlet hole (411) is a stepped hole, the inner end of the probe inlet hole (411) is a smaller hole, and the outer end is a larger hole; The probe cover assembly comprises a probe cover (420), which comprises, from the outside to the inside, a large diameter section, a middle diameter section and a small diameter section, the outer diameters of which decrease in sequence, and the three are connected in sequence coaxially to form the probe cover (420), the large diameter section and the middle diameter section are adapted to and fit with the corresponding side walls of the probe inlet hole (411), the inner end surface of the large diameter section is in contact with the step of the probe inlet hole (411), and the large diameter section is connected to the bottom wall of the larger hole of the probe inlet hole (411) by bolts; The small diameter section of the probe cover (420) extends into the line collection bin (410) and faces the rear end of the probe (310); a guide sleeve (340) is connected between the small diameter section and the rear end of the probe (310); one end of the guide sleeve (340) is sleeved on the small diameter section, and the other end is sleeved on the probe (310) and embedded in the probe installation hole; an abutting step (341) is provided on the inner wall of one end of the guide sleeve (340) corresponding to the probe (310); the abutting step (341) abuts against the rear end of the probe (310); The probe plug (311) is disposed at the rear end of the probe (310), and the probe plug (311) is located in the guide sleeve (340). A wire passing hole (342) is provided on the guide sleeve (340) near the probe plug (311); A waterproof sealing structure is provided between the probe cover (420) and the probe inlet hole (411).

2. The underwater flow meter with a recyclable electronic compartment according to claim 1, characterized in that: The recyclable electronic warehouse (520) is provided with a signal input socket and a signal output socket, wherein the signal input socket is used to connect to the connector of the measurement signal electrical flying lead, and the signal output socket is used to connect to the SCM electrical flying lead connector; The electronic compartment fixing barrel (510) is also connected to two plug fixing seats (530), and the two plug fixing seats (530) are respectively plugged with socket protection caps (540).

3. The underwater flow meter with a recyclable electronic compartment according to claim 2, characterized in that: The guide mechanism comprises a bell mouth (513) connected to the upper end of the cylinder (512), the bell mouth (513) being provided with a guide notch (514) parallel to the axial direction of the cylinder (512), the guide notch (514) extending upward to the upper edge of the bell mouth (513), and the outer wall of the recyclable electronic bin (520) being provided with a guide plate (522), the guide plate (522) being located in the guide notch (514).

4. The underwater flow meter with a recyclable electronic compartment according to claim 3, characterized in that: An end step hole is provided at one end of the wire collection bin (410), and a flange-type wire collection bin cover (430) is buckled on the end step hole. The wire collection bin cover (430) is sealed and matched with the end step hole, and the wire collection bin cover (430) is connected to the wire collection bin (410) by bolts; The line collection connector assembly comprises a core electric fixing seat (440), a core electric through-bin component (441), an electric flying wire fixing seat (442) and a right-angle terminal (443); The core battery fixing seat (440) is cylindrical, and the core battery fixing seat (440) is inserted into the line collection compartment cover (430) and is sealed therewith, and the electric flying wire fixing seat (442) is also cylindrical and is sleeved on the core battery fixing seat (440); The electric lead fixing seat (442) is provided with the core electric lead storage member (441), the signal input end of the core electric lead storage member (441) is connected to the probe plug (311) through a cable, and the signal output end of the core electric lead storage member (441) is connected to the right-angle terminal (443), and the right-angle terminal (443) extends out of the electric lead fixing seat (442) and is sealed with it.

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