Two-phase flow measuring device

Abstract

The two-phase flow measuring device comprises a straight pipe, an instrument head and a valve body, a differential pressure sensor is arranged at the lower end of the instrument head, a first pressure tapping device and a second pressure tapping device are arranged at the lower end of the differential pressure sensor, and the upper sides of the two ends of the straight pipe are connected with a first pressure tapping pipe and a second pressure tapping pipe respectively. The two pressure tapping devices and the two pressure tapping pipes are respectively connected to the upper side and the lower side of the valve body; a rotary valve assembly. The first pressure tapping pipe is communicated with the first pressure tapping device and the second pressure tapping pipe is communicated with the second pressure tapping device during forward circulation in the straight pipe, so that the pressure difference between the two ends in the straight pipe is normally collected, and the first pressure tapping pipe can be switched to be communicated with the second pressure tapping pipe through the first guide pipe during reverse circulation in the straight pipe, so that the pressure difference between the two ends in the straight pipe is normally collected. Therefore, the pressure difference between the two ends of the interior of the straight pipe is reversely collected, normal program calculation of the measuring device is kept, and disassembly and reverse assembly are not needed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flow meters, in particular to a two-phase flow measuring device. BACKGROUND

[0002] In industrial production, such as the gasification unit of thermal power and nuclear power, or the extraction and transportation of natural gas and oil, and the transportation of low-boiling-point liquids, there is a gas-liquid two-phase flow. In such a transportation pipeline, flow is the most basic parameter, and a two-phase flow meter is needed to collect it efficiently and accurately. The existing two-phase flow measuring device can basically meet the daily use requirements, but there are still some deficiencies that need to be improved.

[0003] Patent document CN219694238U discloses a wedge-shaped flow meter, which comprises a straight pipe, a wedge-shaped block, a cover plate and a detection device. The straight pipe is provided with flanges at both ends, and mounting holes, first and second through openings are provided on the side wall of the straight pipe. The wedge-shaped block is arranged in the mounting hole. The cover plate is connected with the wedge-shaped block and is clamped on the side wall of the straight pipe. The cover plate is detachably connected with the straight pipe and is provided with first and second channels. The detection device comprises first and second pressure detection units. The first pressure detection unit detects the pressure of the first channel, and the second pressure detection unit detects the pressure of the second channel. The beneficial effects of the wedge-shaped flow meter are that the detection device is detachably connected to the cover plate, and the cover plate is detachably connected to the straight pipe. Thus, the wedge-shaped block can be taken out of the mounting hole and replaced, thereby improving the maintenance efficiency of the wedge-shaped flow meter, keeping it in good working condition, and achieving accurate measurement of the wedge-shaped flow meter.

[0004] In the prior art as described above, the flow meter is integrated with a differential pressure sensor. By detecting the pressure difference of the fluid flowing into and out of the straight pipe, and combining other collected parameters, the two-phase flow value is obtained through program calculation. In this way, the collection of the pressure difference needs to limit the flow direction of the straight pipe. However, in actual industrial production, the pipeline for input may be changed to an output pipeline in the subsequent production process. At this time, when the flow meter needs to be detected again, it must be reversed after disassembly. Therefore, there is an urgent need for a two-phase flow measuring device to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a two-phase flow measuring device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A two-phase flow measuring device, comprising a straight pipe, a meter head and a valve body, a differential pressure sensor is arranged at the lower end of the meter head, a first pressure taker and a second pressure taker are arranged at the lower end of the differential pressure sensor, a first pressure taking pipe and a second pressure taking pipe are respectively connected to the upper sides of the two ends of the straight pipe, the two pressure takers and the two pressure taking pipes are respectively connected to the upper and lower sides of the valve body, further comprising: a first conduit and a second conduit, one end of each of the first conduit and the second conduit is connected to the side wall of the valve body, and the other end of each of the first conduit and the second conduit is respectively communicated with the second pressure taker and the first pressure taker; a rotary valve assembly arranged in the valve body is used to control the switching of the first pressure taking pipe to be connected with the first pressure taker or the first conduit, and the switching of the second pressure taking pipe to be connected with the second pressure taker or the second conduit.

[0008] Preferably, the rotary valve assembly comprises a first valve block and a second valve block coaxially and synchronously rotating in the valve body, a three-way pipeline is arranged in each of the first valve block and the second valve block, and an operating handle rotatingly connected to the outer side of the valve body is fixedly arranged at the end of the first valve block away from the second valve block.

[0009] Preferably, a limiting assembly for positioning the position of the operating handle is arranged on the outer side of the valve body.

[0010] Preferably, the limiting assembly comprises a button elastically movably arranged on the operating handle, a clamping block is fixedly arranged on the button, a sleeve surrounding the button is arranged on the outer side of the valve body, and a plurality of clamping grooves matched with the clamping block are circumferentially arranged on the inner wall of the sleeve.

[0011] Preferably, the side wall of the valve body is provided with a first interface and a second interface corresponding to the first valve block and the second valve block respectively, a third interface and a fourth interface are respectively arranged on the first pressure taker and the second pressure taker, the two ends of the first conduit are respectively connected to the first interface and the fourth interface, and the two ends of the second conduit are respectively connected to the second interface and the third interface.

[0012] Preferably, the side wall of the valve body is provided with a discharge port corresponding to the second valve block, a plugging piece is detachably arranged on the discharge port, the first valve block and the second valve block are rotationally misaligned, the first pressure taking pipe is simultaneously connected with the first pressure taker and the first conduit, and the discharge port is simultaneously connected with the second pressure taker and the second conduit.

[0013] Preferably, a sliding block is arranged at the end of the second valve block away from the first valve block, and an arc-shaped groove matched with the sliding block is arranged on the inner wall of the valve body.

[0014] Preferably, a torsion slot is arranged at the end of the first valve block away from the operating handle, a mandrel is coaxially arranged on the second valve block, the mandrel is embedded in the torsion slot and is connected to each other through a coil spring.

[0015] Preferably, a temperature sensor is connected to the end of the straight pipe through a hose, and the temperature sensor is detachably arranged on the end of the straight pipe.

[0016] Preferably, the straight pipes are provided with flanges at both ends, the flanges are provided with connecting heads screwed with the temperature sensors, the flanges are radially provided with through holes communicated with the connecting heads and matched with the detection ends of the temperature sensors, and the inner walls of the through holes are provided with a plurality of one-way umbrella rings.

[0017] In the above technical solution, the present application has the following advantages:

[0018] The two-phase flow measuring device is provided with the first conduit, the second conduit and the rotary valve assembly, so that the first pressure tapping pipe is connected with the first pressure taker and the second pressure tapping pipe is connected with the second pressure taker when the straight pipe is used for forward flow, thereby normally collecting the pressure difference between the two ends of the straight pipe, and when the straight pipe is used for reverse flow, the first pressure tapping pipe is connected with the second pressure tapping pipe through the first conduit and the second pressure tapping pipe is connected with the first pressure taker through the second conduit, thereby reversely collecting the pressure difference between the two ends of the straight pipe, keeping the normal program calculation of the measuring device, and without the need of disassembly and reverse installation or design of more complex program.

[0019] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, rather than limiting the present disclosure.

[0020] This application file provides an overview of various implementations or examples of the technology described in this disclosure and is not intended to be all inclusive or to provide an exhaustive list of features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 It is a schematic diagram of the front view cross-sectional structure of the present application;

[0024] Figure 3 It is a schematic diagram of the Figure 2 enlarged structure of position A in the present application;

[0025] Figure 4 It is a schematic diagram of the Figure 2 enlarged structure of position B in the present application;

[0026] Figure 5 It is a schematic diagram of the valve block structure of the present application;

[0027] Figure 6 It is a schematic diagram of the plane structure of the slider and the arc-shaped groove of the present application;

[0028] Figure 7 Fig. 2 is a partial state structure schematic diagram of two valve blocks in a first position of the present application;

[0029] Figure 8 Fig. 3 is a partial state structure schematic diagram of two valve blocks in a second position of the present application;

[0030] Figure 9 Fig. 4 is a partial state structure schematic diagram of two valve blocks in a third position of the present application;

[0031] Figure 10 Fig. 5 is a partial state structure schematic diagram of two valve blocks in a fourth position of the present application.

[0032] BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 1. straight pipe; 2. instrument head; 3. valve body; 4. differential pressure sensor; 5. first pressure taker; 6. second pressure taker; 7. first pressure taking pipe; 8. second pressure taking pipe; 9. first conduit; 10. second conduit; 11. first valve block; 12. second valve block; 13. operating handle; 14. button; 15. clamping block; 16. sleeve; 17. clamping groove; 18. first interface; 19. second interface; 20. third interface; 21. fourth interface; 22. discharge port; 23. plugging member; 24. sliding block; 25. arcuate groove; 26. torsion groove; 27. mandrel; 28. coil spring; 29. hose; 30. temperature sensor; 31. flange; 32. connector; 33. perforation; 34. one-way umbrella. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.

[0035] Reference will be made to Figures 1-10The embodiment of the present application provides a two-phase flow measuring device, which comprises a straight pipe 1, a meter head 2 and a valve body 3, the lower end of the meter head 2 is provided with a differential pressure sensor 4, the lower end of the differential pressure sensor 4 is provided with a first pressure taker 5 and a second pressure taker 6, the upper sides of the two ends of the straight pipe 1 are respectively connected with a first pressure taking pipe 7 and a second pressure taking pipe 8, the two pressure takers and the two pressure taking pipes are respectively connected to the upper and lower sides of the valve body 3, and the two-phase flow measuring device further comprises a first conduit 9 and a second conduit 10, one end of each of the first conduit 9 and the second conduit 10 is connected to the side wall of the valve body 3, and the other end of each of the first conduit 9 and the second conduit 10 is respectively communicated with the second pressure taker 6 and the first pressure taker 5; a rotary valve assembly is arranged in the valve body 3 and is used for controlling the first pressure taking pipe 7 to be switched to be connected with the first pressure taker 5 or the first conduit 9, and simultaneously controlling the second pressure taking pipe 8 to be switched to be connected with the second pressure taker 6 or the second conduit 10.

[0036] Specifically, the straight pipe 1 is horizontally connected to a conveying pipeline; the meter head 2 is used for displaying measurement data and is vertically arranged above the straight pipe 1; the valve body 3 is arranged between the straight pipe 1 and the meter head 2; the valve body 3 is in the shape of a cylindrical cylinder; the differential pressure sensor 4 obtains pressure data collected by the first pressure taker 5 and the second pressure taker 6, calculates a difference value, and sends the difference value to the meter head 2 for program calculation; the first pressure taker 5 and the first pressure taking pipe 7 correspond to the upper and lower ends of the valve body 3 and are respectively connected to the upper and lower ends of the valve body 3, the second pressure taker 6 and the second pressure taking pipe 8 correspond to the upper and lower ends of the valve body 3 and are respectively connected to the upper and lower ends of the valve body 3; the lower end of the first pressure taking pipe 7 and the lower end of the second pressure taking pipe 8 are respectively arranged close to the two ends of the straight pipe 1. The first conduit 9 and the second conduit 10 are cross-arranged, the lower end of the first conduit 9 is connected to one end of the valve body 3 close to the first pressure taking pipe 7, and the upper end of the first conduit 9 is connected to the second pressure taker 6; the lower end of the second conduit 10 is connected to one end of the valve body 3 close to the second pressure taking pipe 8, and the upper end of the second conduit 10 is connected to the first pressure taker 5; under the control of the rotary valve assembly, when the first pressure taking pipe 7 is connected with the first conduit 9, that is, the first pressure taking pipe 7 is connected with the second pressure taker 6 through the first conduit 9, and the second pressure taking pipe 8 is connected with the second conduit 10, that is, the second pressure taking pipe 8 is connected with the first pressure taker 5 through the second conduit 10. In actual use, when the straight pipe 1 is in forward flow, the rotary valve assembly controls the first pressure taking pipe 7 to be connected with the first pressure taker 5, and the second pressure taking pipe 8 to be connected with the second pressure taker 6, so that the pressure difference between the two ends of the straight pipe 1 is normally collected, and when the straight pipe 1 is in reverse flow, the rotary valve assembly controls the first pressure taking pipe 7 to be connected with the second pressure taking pipe 8 through the first conduit 9, and the second pressure taking pipe 8 to be connected with the first pressure taker 5 through the second conduit 10, so that the pressure difference between the two ends of the straight pipe 1 is reversely collected, the measuring device is kept normal program calculation, does not need to be disassembled and reassembled, and does not need to design a more complex program.

[0037] Compared with the prior art, the two-phase flow measuring device provided by the embodiment of the application can connect the first pressure tapping pipe 7 with the first pressure taker 5 and connect the second pressure tapping pipe 8 with the second pressure taker 6 when the straight pipe 1 is used for normal flow, so that the pressure difference between the two ends of the straight pipe 1 can be normally collected, and when the straight pipe 1 is used for reverse flow, the first pressure tapping pipe 7 can be connected with the second pressure tapping pipe 8 through the first conduit 9, and the second pressure tapping pipe 8 can be connected with the first pressure taker 5 through the second conduit 10, so that the pressure difference between the two ends of the straight pipe 1 can be reversely collected, the normal program calculation of the measuring device is kept, and it is not necessary to disassemble and reverse the device or design a more complex program.

[0038] As the preferred technical scheme of the embodiment, the rotating valve assembly comprises the first valve block 11 and the second valve block 12 which are coaxially and synchronously rotated in the valve body 3, the three-way pipeline is arranged in each of the first valve block 11 and the second valve block 12, the operating handle 13 which is rotationally connected to the outer side of the valve body 3 is fixedly arranged at the end of the first valve block 11 away from the second valve block 12, specifically, the first valve block 11 is arranged at the end of the position where the first pressure taker 5, the first pressure tapping pipe 7 and the first conduit 9 are connected to the valve body 3, and the second valve block 12 is arranged at the end of the position where the second pressure taker 6, the second pressure tapping pipe 8 and the second conduit 10 are connected to the valve body 3; the first pressure taker 5, the first pressure tapping pipe 7 and the first conduit 9 are connected to the valve body 3 in a T-shaped distribution mode; the second pressure taker 6, the second pressure tapping pipe 8 and the second conduit 10 are also connected to the valve body 3 in a T-shaped distribution mode; the first conduit 9 and the second conduit 10 are arranged on the same side of the valve body 3; the three-way pipeline is arranged in a T-shaped mode; the operating handle 13 directly drives the first valve block 11 to rotate, and the second valve block 12 synchronously rotates with the first valve block 11; when the first pressure tapping pipe 7 is connected with the first pressure taker 5 through the three-way pipeline on the first valve block 11, the second pressure tapping pipe 8 is simultaneously connected with the second pressure taker 6 through the three-way pipeline on the second valve block 12; when the first pressure tapping pipe 7 is connected with the first conduit 9 through the three-way pipeline on the first valve block 11, the second pressure tapping pipe 8 is simultaneously connected with the second conduit 10 through the three-way pipeline on the second valve block 12.

[0039] As the preferred technical scheme of the embodiment, the outer side of the valve body 3 is provided with a limiting assembly for positioning the position of the operating handle 13, specifically, the limiting assembly limits the rotation of the operating handle 13, and further fixes the rotating positions of the first valve block 11 and the second valve block 12.

[0040] As a further preferred technical solution of the embodiment, the limiting assembly comprises a button 14 elastically movably arranged on the operating handle 13, a clamping block 15 is fixedly arranged on the button 14, a sleeve 16 is arranged outside the valve body 3 and surrounds the button 14, a plurality of clamping grooves 17 matched with the clamping block 15 are circumferentially arranged on the inner wall of the sleeve 16, specifically, an elastic groove is arranged in the rotating shaft of the operating handle 13, a spring is arranged in the elastic groove and connects the button 14, the spring hinders the movement of the button 14 into the elastic groove, so that the button 14 is automatically kept in the state of extending outward, which is convenient for pressing; the clamping block 15 extends radially from the button 14, under the elastic force, the position where the button 14 is at rest corresponds to the position of the sleeve 16 carrying the clamping block 15, when the clamping block 15 corresponds to the clamping groove 17, the clamping block 15 is automatically embedded in the clamping groove 17, thereby limiting the rotation of the operating handle 13; the sleeve 16 is in the shape of a rotating body and is internally provided with a cavity, the end of the sleeve 16 away from the valve body 3 is provided with the clamping groove 17, when the button 14 is pressed and drives the clamping block 15 to move away from the clamping groove 17, the clamping block 15 is accommodated into the cavity, at this time, the operating handle 13 rotates and the clamping block 15 can freely move in the cavity; a chamfer is arranged at the position where the inner wall of the cavity meets the clamping groove 17, which can facilitate the clamping block 15 to automatically identify the position of the clamping groove 17, when the clamping block 15 moves to the vicinity of the clamping groove 17, the chamfer assists the clamping block 15 to be embedded in the clamping groove 17; the clamping groove 17 is preferably four, which are uniformly distributed in the circumference, thereby enabling the operating handle 13 to rotate by an integer multiple of 90°, which matches the T-shaped distribution arranged on the valve body 3.

[0041] As a preferred technical solution of the embodiment, the side wall of the valve body 3 is provided with a first interface 18 and a second interface 19 corresponding to the first valve block 11 and the second valve block 12 respectively, a third interface 20 and a fourth interface 21 are arranged on the first pressure taker 5 and the second pressure taker 6 respectively, the two ends of the first conduit 9 are connected with the first interface 18 and the fourth interface 21 respectively, the two ends of the second conduit 10 are connected with the second interface 19 and the third interface 20 respectively, specifically, the first interface 18, the first pressure taker 5 and the first pressure taking pipe 7 form a T-shaped arrangement; the second interface 19, the second pressure taker 6 and the second pressure taking pipe 8 form a T-shaped arrangement; the third interface 20 is arranged on the upper side of the first interface 18, and the fourth interface 21 is arranged on the upper side of the second interface 19, thereby the first conduit 9 and the second conduit 10 form a cross arrangement.

[0042] Within the synchronous rotating movement range of the first valve block 11 and the second valve block 12, there are three effective positions:

[0043] The first position, referring to Figure 7 , the three-way pipeline of the first valve block 11 communicates with the first pressure taker 5 and the first pressure taking pipe 7, while the remaining branch pipelines are away from the direction of the first conduit 9, at the same time, the three-way pipeline of the second valve block 12 communicates with the second pressure taker 6 and the second pressure taking pipe 8, while the remaining branch pipelines are away from the direction of the second conduit 10, at this time, the measuring device is collecting the pressure difference in the forward direction;

[0044] second position, reference Figure 8 , the three-way pipe of the first valve block 11 communicates with the first pressure tapping pipe 7 and the first conduit 9, while the remaining branch pipes are away from the first conduit 9, at the same time, the three-way pipe of the second valve block 12 communicates with the second pressure tapping pipe 8 and the second conduit 10, while the remaining branch pipes are away from the second conduit 10, at this time, the first pressure tapping pipe 7 is connected to the second pressure tapping pipe 8 through the first conduit 9, the second pressure tapping pipe 8 is connected to the first pressure tapping pipe 7 through the second conduit 10, and the measuring device collects the pressure difference in the reverse direction;

[0045] third position, reference Figure 9 , the three-way pipe of the first valve block 11 communicates with the first pressure tapping pipe 5 and the first conduit 9, while the remaining branch pipes are away from the first conduit 9, that is, none of the branches of the three-way pipe of the first valve block 11 is connected to the first pressure tapping pipe 7, at the same time, the three-way pipe of the second valve block 12 communicates with the second pressure tapping pipe 6 and the second conduit 10, while the remaining branch pipes are away from the second conduit 10, that is, none of the branches of the three-way pipe of the second valve block 12 is connected to the second pressure tapping pipe 8, at this time, the first pressure tapping pipe 7 and the second pressure tapping pipe 8 are both closed, and the measuring device stops collecting the pressure difference, which can be used for disassembly and maintenance of the instrument head 2 and the pressure tapping pipe.

[0046] Since the first pressure tapping pipe 5 and the second pressure tapping pipe 6 are the detection terminals, it is difficult for the fluid to flow in other directions after entering, which may cause impurities to accumulate and affect the detection accuracy, and therefore needs to be cleaned regularly.

[0047] In another embodiment of the present application, the side wall of the valve body 3 is provided with a discharge port 22 corresponding to the second valve block 12, and a sealing member 23 is detachably arranged on the discharge port 22. The first valve block 11 and the second valve block 12 are rotationally offset, and the first pressure taking pipe 7 is simultaneously connected to the first pressure taker 5 and the first conduit 9. The discharge port 22 is simultaneously connected to the second pressure taker 6 and the second conduit 10. Specifically, the discharge port 22 is arranged on the opposite side of the second interface 19, and forms a cross-shaped arrangement with the second pressure taker 6, the second pressure taking pipe 8 and the second interface 19. The sealing member 23 is preferably a screw member, which is convenient to disassemble and assemble. When the measuring device is normally used for measurement, the sealing member 23 keeps the discharge port 22 sealed. The end of the second valve block 12 away from the first valve block 11 is provided with a sliding block 24, and the inner wall of the valve body 3 is provided with an arc-shaped groove 25 matched with the sliding block 24. The arc-shaped groove 25 is arranged in the upper half of the valve body 3, and the arc is preferably 180°. In the first position, the sliding block 24 is at the highest position in the active range, and corresponds to the middle position of the arc-shaped groove 25, thereby limiting the second valve block 12 to rotate only 90° clockwise or 90° counterclockwise from the first position, i.e. to meet the switching of the second valve block 12 from the first position to the second position or the third position. The end of the first valve block 11 away from the operating handle 13 is provided with a torsion groove 26, and the second valve block 12 is coaxially provided with a mandrel 27, which is embedded in the torsion groove 26 and connected to each other by a coil spring 28. When the first valve block 11 and the second valve block 12 can freely rotate, the coil spring 28 makes the first valve block 11 and the second valve block 12 rotate synchronously. After the second valve block 12 rotates 90° clockwise or 90° counterclockwise from the first position, the sliding block 24 on the second valve block 12 is limited by the arc-shaped groove 25. Therefore, under the continuous rotation of the first valve block 11, the first valve block 11 can rotate relative to the second valve block 12 against the elastic force of the coil spring 28. Thus, when the second valve block 12 rotates to the third position, the continuous rotation of the first valve block 11 in the same direction can switch the first valve block 11 to make the three-way pipe on it simultaneously connect the first pressure taker 5, the first pressure taking pipe 7 and the first conduit 9. At this time, the three-way pipe on the second valve block 12 simultaneously connects the second pressure taker 6 and the second conduit 10 to the discharge port 22, thereby forming the fourth position of the first valve block 11. Figure 10 In this position, the second pressure taking pipe 8 is closed, the first pressure taking pipe 7 guides the fluid to be divided into the first pressure taker 5 and the first conduit 9. The fluid entering the first pressure taker 5 is guided to the discharge port 22 through the second conduit 10 and the three-way pipe of the second valve block 12. The fluid entering the first conduit 9 is also guided to the discharge port 22 through the second pressure taker 6 and the three-way pipe of the second valve block 12. Thus, the discharge port 22 can discharge the impurities and precipitates accumulated in the first pressure taker 5 and the second pressure taker 6, and smoothly realize the cleaning effect.

[0048] The above first position, second position, third position and fourth position are matched with the limiting of the four rotation positions of the operating handle 13.

[0049] In yet another embodiment of the present application, the instrument head 2 is connected with a temperature sensor 30 through a hose 29, which is detachably arranged at the end of the straight pipe 1. Specifically, the temperature sensor 30 detects the temperature of the fluid at the outlet end of the straight pipe 1, so as to assist the program calculation of the flow rate in combination with the collected differential pressure and other data. According to the principles of fluid mechanics and thermodynamics, it is more optimal to measure the temperature at the outlet end of the straight pipe 1, and the specific principles are known in the art and will not be described herein.

[0050] As a preferred technical solution of the present embodiment, the straight pipe 1 is provided with flanges 31 at both ends, and the flanges 31 are provided with connecting heads 32 that are screwed with the temperature sensor 30. The flanges 31 are radially provided with perforations 33 that are in communication with the connecting heads 32 and match the detection end of the temperature sensor 30. The inner wall of the perforations 33 is provided with a plurality of one-way umbrella rings 34. Specifically, the detection end of the temperature sensor 30 is in the shape of a cylindrical needle. When the temperature sensor 30 is connected with the connecting head 32 on one of the flanges 31, the connecting head 32 on the other flange 31 is blocked by a screwing member. The temperature sensor 30 is kept installed at the outlet end of the straight pipe 1, that is, the reversing of the pressure differential collection is kept. The detection end of the temperature sensor 30 penetrates into the interior of the straight pipe 1 through the perforation 33. The one-way umbrella ring 34 is elastic and includes a plurality of blades arranged circumferentially. When not subjected to external force, the blades of the one-way umbrella ring 34 elastically approach each other to form a closed conical sleeve, and the conical tip is directed toward the interior of the straight pipe 1. The maximum expansion aperture of the one-way umbrella ring 34 is not less than the outer diameter of the detection end of the temperature sensor 30. In actual use, when the temperature sensor 30 is screwed on the connecting head 32, the needle-shaped detection end of the temperature sensor 30 can penetrate through the perforation 33 and, when passing through the one-way umbrella ring 34, the blades of the one-way umbrella ring 34 are expanded by extrusion, so that the temperature sensor 30 smoothly penetrates into the interior of the straight pipe 1. When the temperature sensor 30 is detached, the detection end of the temperature sensor 30 is separated from the one-way umbrella ring 34, and the blades of the one-way umbrella ring 34 are automatically elastically contracted to prevent leakage of the perforation 33. Subsequently, the connecting head 32 is connected with the screwing member to form a seal.

[0051] The foregoing merely describes some exemplary embodiments of the present application by way of illustration, and it is self-evident that those skilled in the art can modify the described embodiments in various manners without departing from the spirit and scope of the present application. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. A two-phase flow measuring device, comprising a straight pipe (1), a meter head (2) and a valve body (3), the lower end of the meter head (2) is provided with a differential pressure sensor (4), the lower end of the differential pressure sensor (4) is provided with a first pressure taker (5) and a second pressure taker (6), the upper sides of the two ends of the straight pipe (1) are respectively connected with a first pressure taking pipe (7) and a second pressure taking pipe (8), the two pressure takers and the two pressure taking pipes are respectively connected to the upper and lower sides of the valve body (3), characterized in that, Also include: The first conduit (9) and the second conduit (10), one end of which is connected to the side wall of the valve body (3), and the other end is communicated with the second pressure taker (6) and the first pressure taker (5) respectively; The rotary valve assembly is arranged in the valve body (3), which is used for controlling the first pressure pipe (7) switching and connecting with the first pressure taker (5) or the first conduit (9), while the second pressure pipe (8) switching and connecting with the second pressure taker (6) or the second conduit (10).

2. The two-phase flow measurement device of claim 1, wherein, The rotary valve assembly includes the first valve block (11) and the second valve block (12) which rotate synchronously in the valve body (3), the first valve block (11) and the second valve block (12) are provided with three-way pipes, and the first valve block (11) is fixedly provided with an operating handle (13) which is rotatably connected to the outside of the valve body (3) at one end away from the second valve block (12).

3. The two-phase flow measurement device of claim 2, wherein, The outside of the valve body (3) is provided with a limiting assembly for positioning the position of the operating handle (13).

4. The two-phase flow measurement device of claim 3, wherein, The limiting assembly includes a button (14) which is elastically arranged on the operating handle (13), a clamping block (15) is fixedly arranged on the button (14), and a sleeve (16) is arranged around the button (14) on the outside of the valve body (3), a plurality of clamping grooves (17) matched with the clamping block (15) are circumferentially arranged on the inner wall of the sleeve (16).

5. The two-phase flow measurement device of claim 2, wherein, The side wall of the valve body (3) is provided with a first interface (18) and a second interface (19) corresponding to the first valve block (11) and the second valve block (12) respectively, a third interface (20) and a fourth interface (21) are arranged on the first pressure taker (5) and the second pressure taker (6) respectively, and the first conduit (9) is connected to the first interface (18) and the fourth interface (21) at both ends respectively, and the second conduit (10) is connected to the second interface (19) and the third interface (20) at both ends respectively.

6. The two-phase flow measurement device of claim 2, wherein, The side wall of the valve body (3) is provided with a discharge port (22) corresponding to the second valve block (12), a blocking piece (23) is detachably arranged on the discharge port (22), the first valve block (11) and the second valve block (12) are rotatably misaligned, and the first pressure pipe (7) is connected with the first pressure taker (5) and the first conduit (9) at the same time, and the discharge port (22) is connected with the second pressure taker (6) and the second conduit (10) at the same time.

7. The two-phase flow measurement device of claim 6, wherein, The second valve block (12) is provided with a sliding block (24) at one end away from the first valve block (11), and the inner wall of the valve body (3) is provided with an arc-shaped groove (25) matched with the sliding block (24).

8. The two-phase flow measurement device of claim 6, wherein, The first valve block (11) is provided with a torsion slot (26) at one end away from the operating handle (13), the second valve block (12) is coaxially provided with a mandrel (27), the mandrel (27) is embedded in the torsion slot (26) and connected by a coil spring (28).

9. The two-phase flow measurement device of claim 1, wherein, The instrument head (2) is connected with a temperature sensor (30) through a hose (29), and the temperature sensor (30) is detachably connected with the end of the straight pipe (1).

10. The two-phase flow measurement device of claim 9, wherein, The straight pipe (1) is provided with flanges (31) at both ends, the flanges (31) are provided with connecting heads (32) which are screwed with temperature sensors (30), the flanges (31) are provided with perforations (33) which are communicated with the connecting heads (32) and matched with the detecting ends of the temperature sensors (30) in the radial direction, and the inner walls of the perforations (33) are provided with a plurality of one-way umbrella rings (34).

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