Novel thick oil multiphase flowmeter

Abstract

The invention discloses a novel thick oil multiphase flowmeter, and relates to the technical field of flowmeters. The separation chamber, the auxiliary liquid screening pipe and the exhaust pipe are used for efficient gas-liquid separation. The anti-blocking assembly composed of the washing anti-blocking pipe, the conical limiting block and the rotatable cleaning shifting plate is used for preventing solid impurities from being accumulated and blocked. Due to the arrangement of the pressure sensor, multi-redundancy flow measurement of the gas phase and the liquid phase is achieved, and the reliability of data is improved. And the equipment design allows cleaning and maintenance of key parts under the condition of no shutdown, so that the operation cost is reduced, and the efficiency is improved. The flowmeter overcomes the defects of incomplete gas-liquid separation, easiness in blockage, difficulty in maintenance and inaccurate measurement in the prior art. Through a self-cleaning and anti-blocking structure and multiple flow measurement and on-line maintenance functions, the invention provides a high-reliability and multifunctional flow measurement device suitable for thickened oil recovery and transportation.

Description

Technical Field

[0001] The invention relates to the technical field of flow meters, in particular to a novel heavy oil multiphase flow meter. Background Art

[0002] Existing heavy oil multiphase flowmeters have many deficiencies in gas-liquid separation and anti-blocking. Traditional separation devices are inefficient, and heavy oil and gas cannot be completely separated, resulting in inaccurate flow measurement. At the same time, the high viscosity of heavy oil and the presence of solid impurities are easily accumulated inside pipelines and flowmeters, causing blockages. Existing equipment usually lacks effective online cleaning and anti-blocking mechanisms, is difficult to maintain, and requires shutdown for cleaning, affecting production efficiency. In addition, traditional flowmeters often rely on a single measurement method, lack redundancy, and cannot guarantee measurement accuracy under harsh working conditions. These problems seriously restrict the monitoring and control of heavy oil extraction and transportation processes. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a novel heavy oil multiphase flowmeter comprises a separation chamber, an auxiliary liquid sieve pipe is connected to the top of the separation chamber, an exhaust pipe is connected to the top of the auxiliary liquid sieve pipe, the exhaust pipe is horizontally arranged at one end away from the auxiliary liquid sieve pipe, and an air pressure detection pipe is connected to the horizontal end of the exhaust pipe along its own radial direction, and an air pressure sensor is arranged inside the air pressure detection pipe; a lower leakage elbow is arranged at the bottom of the separation chamber, an output pipe is arranged on the side of the lower leakage elbow, an anti-blocking component is connected in series between the output pipe and the lower leakage elbow, and an inlet pipe is connected to the middle and upper part of the circumferential surface of the separation chamber along its own radial direction; the anti-blocking component comprises a flushing anti-blocking pipe, and the two ends of the flushing anti-blocking pipe are connected to the corresponding lower leakage elbow and the output pipe through a first three-way pipe and a second three-way pipe respectively, and a conical limiting block is fixed to the axial position of the inner part of the flushing anti-blocking pipe through a conical limiting block bracket.

[0004] Preferably, a gap is provided in the middle of the flushing and anti-blocking pipe, a passive gear ring is installed in the rotary seal in the gap, and the inner wall of the flushing and anti-blocking pipe is located at the position of the gap and a cleaning plate rotating sleeve is provided in an embedded manner for rotating the seal, and the same number of cleaning plates as the conical limiting block bracket are fixed on the inner wall of the cleaning plate rotating sleeve, and the cleaning plates are in contact and sliding cooperation with the conical limiting block bracket.

[0005] Preferably, one end of the conical limiting block is conically set, and the other end of the conical limiting block is plane-set, a facing conical block is set on the side of the plane, and a pressure sensor is fixedly provided between the facing conical block and the plane of the conical limiting block.

[0006] Preferably, two coaxial second bypass pipes and a first bypass pipe are arranged on the side of the flushing and anti-blocking pipe and parallel to the axial direction of the flushing and anti-blocking pipe, and the rotary seal at the butt end of the second bypass pipe and the first bypass pipe is equipped with a driving gear ring, and the driving gear ring is located on the inner side of the first bypass pipe and the second bypass pipe and is fixed with a driving blade.

[0007] Preferably, the first bypass pipe is connected to the first three-way pipe, and the second bypass pipe is connected to the second three-way pipe, wherein a one-way valve is arranged inside the first bypass pipe to allow liquid to enter the first bypass pipe from the first three-way pipe, and a one-way valve is arranged at the connection between the second three-way pipe and the second bypass pipe to prevent liquid from entering the second bypass pipe from the second three-way pipe; wherein the connection between the second bypass pipe and the second three-way pipe adopts an arc-shaped end face, and the center of the arc-shaped end face intersects with the axis of the connection between the first bypass pipe and the second bypass pipe, and a sealing threaded ring is provided on the outer threaded sealing sleeve at the connection between the arc-shaped end faces of the second three-way pipe and the second bypass pipe.

[0008] Preferably, a guide block coaxial with the first bypass pipe is suspended and fixed on the inner wall of the first bypass pipe by a guide block bracket, and a sealing ring is slidably provided on the inner wall of the second bypass pipe. The sealing ring can be sleeved on the circumferential surface of the guide block to block the connecting path from the first bypass pipe to the second bypass pipe, wherein the circular array of driving blades is arranged in the gap between the inner wall of the first bypass pipe and the circumferential surface of the guide block.

[0009] Preferably, a second sealing plate and a second sealing chamber are fixedly sealed on both sides of the gap arranged in the middle of the scour prevention tube, and the first sealing chamber is fixedly sealed on both sides of the butt ends of the second bypass tube and the first bypass tube, and a first sealing plate is fixedly sealed on the side of the first sealing chamber, and the first sealing plate and the second bypass tube are matched in a rotating seal, wherein the second sealing plate and the second sealing chamber are fixedly sealed with the outer surface of the first bypass tube, and the first sealing plate and the first sealing chamber are fixedly sealed with the outer surface of the scour prevention tube.

[0010] Preferably, a driven input gear meshing with the passive gear ring is rotatably installed inside the second sealing plate and the second sealing chamber, and an active input gear meshing with the driving gear ring is rotatably installed inside the first sealing plate and the first sealing chamber; a separation one-way transmission cover and a rotating dial are rotatably installed between the opposite surfaces of the first sealing chamber and the second sealing plate, wherein the separation one-way transmission cover is sleeved on the outside of the rotating dial, the separation one-way transmission cover and the active input gear are fixed and synchronously transmitted through a rotating shaft, and the rotating dial and the driven input gear are fixed and synchronously transmitted through a rotating shaft.

[0011] Preferably, a rotating block is rotatably provided on the inner wall of the separation one-way transmission cover, and the rotating block is rotationally matched with the end face of the rotating dial. Two symmetrically arranged inclined grooves are provided on the circumferential surface of the rotating block, and a magnetic column is provided in sliding contact with the inner wall of each inclined groove and the separation one-way transmission cover. The circumferential surface of the magnetic column is magnetically contacted with a magnetic lever, and all the second sealing plates are fixedly matched with the rotating dial.

[0012] Preferably, a screw is provided on the inner wall of the second bypass pipe at a threaded seal coaxially with the first bypass pipe, one end of the screw located inside the second bypass pipe is fixedly matched with the sealing ring, and one end of the screw located outside the second bypass pipe is fixed with a handle wheel.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention realizes the self-cleaning function of the inside of the pipeline by arranging a conical limiting block and a rotatable cleaning plate inside the flushing anti-blocking pipe. The gap between the conical limiting block and the pipe wall is reduced, which increases the flow rate of the heavy oil and prevents the deposition of solid impurities. The cleaning plate can rotate to remove impurities accumulated on the conical limiting block bracket, and can play a role in clearing the blockage when blockage occurs. This self-cleaning mechanism reduces the maintenance frequency, ensures the continuous and stable operation of the flowmeter, and improves the reliability and efficiency of the equipment; (2) The present invention effectively prevents heavy oil from splashing into the exhaust pipe by arranging an auxiliary screen pipe with a height at least five times that of the separation chamber, thereby ensuring the thoroughness of gas-liquid separation. This design improves the accuracy of gas and liquid flow measurement and avoids measurement errors caused by mutual mixing. Effective separation under gravity allows the heavy oil and gas to enter their respective pipelines respectively, ensuring the accuracy of subsequent measurement and processing; (3) The present invention arranges pressure sensors in both the gas and liquid paths to achieve redundant measurement of flow. The air pressure sensor in the exhaust pipe and the pressure sensor at the conical restriction block provide dual flow detection methods. This redundant design improves data reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of the scouring and anti-blocking pipe of the present invention.

[0016] Figure 3 It is a structural schematic diagram of the guide block of the present invention.

[0017] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle.

[0018] Figure 5 It is a schematic diagram of the structure of the separated one-way transmission cover of the present invention.

[0019] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at point B in the middle.

[0020] Figure 7 This is a schematic diagram of the internal structure of the flushing and anti-blocking pipe of the present invention.

[0021] Figure 8 It is a schematic diagram of the structure of the front cone block of the present invention.

[0022] In the figure: 101-separation chamber; 102-inlet pipe; 103-exhaust pipe; 104-auxiliary screen pipe; 105-air pressure sensor; 106-air pressure detection pipe; 107-output pipe; 108-lower leakage elbow; 109-first three-way pipe; 110-second three-way pipe; 111-second bypass pipe; 112-first bypass pipe; 113-check valve; 114-handle wheel; 115-screw rod; 116-blocking ring; 117-guiding block; 118-driving blade; 119-driving gear ring; 120-scouring anti-blocking pipe; 121-first sealing plate; 12 2-first sealing chamber; 123-second sealing plate; 124-second sealing chamber; 125-active input gear; 126-separation one-way transmission cover; 127-driven input gear; 128-passive gear ring; 129-rotating dial; 130-rotating block; 131-bevel groove; 132-magnetic lever; 133-magnetic column; 134-cleaning plate rotating sleeve; 135-cleaning plate; 136-sealing threaded collar; 137-conical limiting block; 138-conical limiting block bracket; 139-front cone block; 140-pressure sensor; 141-guide block bracket. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-8 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0024] The present invention provides a novel heavy oil multiphase flowmeter, comprising a separation chamber 101, wherein the top of the separation chamber 101 is connected to an auxiliary liquid sieve pipe 104, the top of the auxiliary liquid sieve pipe 104 is connected to an exhaust pipe 103, the exhaust pipe 103 is horizontally arranged at one end away from the auxiliary liquid sieve pipe 104, and the horizontally arranged end of the exhaust pipe 103 is connected to an air pressure detection pipe 106 along its radial direction, and an air pressure sensor 105 is arranged inside the air pressure detection pipe 106; the bottom end of the separation chamber 101 is provided with a lower leakage elbow 108, and the side of the lower leakage elbow 108 is connected to the lower leakage elbow 108. An output pipe 107 is provided, and an anti-blocking component is provided in series between the output pipe 107 and the lower leakage elbow 108, and an inlet pipe 102 is provided in the middle and upper part of the circumferential surface of the separation chamber 101 along its own radial direction; the anti-blocking component includes a flushing anti-blocking pipe 120, and both ends of the flushing anti-blocking pipe 120 are connected with the corresponding lower leakage elbow 108 and the output pipe 107 through a first tee pipe 109 and a second tee pipe 110 respectively, and a conical limiting block 137 is suspended and fixed at the internal axial position of the flushing anti-blocking pipe 120 through a conical limiting block bracket 138.

[0025] A gap is provided in the middle of the flushing and anti-blocking pipe 120, and a passive gear ring 128 is installed in the gap for rotary sealing, and a cleaning plate rotating sleeve 134 is provided in an embedded manner for rotary sealing at the inner wall of the flushing and anti-blocking pipe 120 at the position of the gap, and the same number of cleaning plates 135 as the conical limiting block bracket 138 are fixed on the inner wall of the cleaning plate rotating sleeve 134, and the cleaning plates 135 are in contact and sliding cooperation with the conical limiting block bracket 138. One end of the conical limiting block 137 is conical, and the other end of the conical limiting block 137 is plane, and a front cone block 139 is provided on the side of the plane, and a pressure sensor 140 is fixed between the front cone block 139 and the plane of the conical limiting block 137.

[0026] Two coaxial second bypass pipes 111 and first bypass pipes 112 are arranged on the side of the flushing and anti-blocking pipe 120 and parallel to the axial direction of the flushing and anti-blocking pipe 120. The butt-end rotation seals of the second bypass pipe 111 and the first bypass pipe 112 are equipped with a driving gear ring 119. The driving gear ring 119 is located on the inner side of the first bypass pipe 112 and the second bypass pipe 111 and is fixed with a driving blade 118. The first bypass pipe 112 is connected to the first three-way pipe 109, and the second bypass pipe 111 is connected to the second three-way pipe 110, wherein a one-way valve 113 is arranged inside the first bypass pipe 112 to allow liquid to enter the first bypass pipe 112 from the first three-way pipe 109, and a one-way valve 113 is arranged at the connection between the second three-way pipe 110 and the second bypass pipe 111 to prevent liquid from entering the second bypass pipe 111 from the second three-way pipe 110; wherein the connection between the second bypass pipe 111 and the second three-way pipe 110 adopts an arc-shaped end face, and the center of the arc-shaped end face intersects with the axis of the connection between the first bypass pipe 112 and the second bypass pipe 111, and a sealing threaded collar 136 is provided on the outer threaded sealing sleeve at the connection between the arc-shaped end faces of the second three-way pipe 110 and the second bypass pipe 111. A guide block 117 coaxial with the first bypass pipe 112 is suspended and fixed on the inner wall of the first bypass pipe 112 through a guide block bracket 141, and a sealing ring 116 is slidably arranged on the inner wall of the second bypass pipe 111. The sealing ring 116 can be sleeved on the circumferential surface of the guide block 117 to block the connecting path from the first bypass pipe 112 to the second bypass pipe 111, wherein a circular array of driving blades 118 is arranged in the gap between the inner wall of the first bypass pipe 112 and the circumferential surface of the guide block 117.

[0027] A second sealing plate 123 and a second sealing chamber 124 are fixedly sealed on both sides of a gap arranged in the middle of the scour prevention pipe 120, and a first sealing chamber 122 is fixedly sealed on both sides of the butt ends of the second bypass pipe 111 and the first bypass pipe 112, and a first sealing plate 121 is fixedly sealed on the side of the first sealing chamber 122. The first sealing plate 121 and the second bypass pipe 111 are matched in a rotating seal manner, wherein the second sealing plate 123 and the second sealing chamber 124 are both fixedly sealed with the outer surface of the first bypass pipe 112, and the first sealing plate 121 and the first sealing chamber 122 are both fixedly sealed with the outer surface of the scour prevention pipe 120. A driven input gear 127 meshing with a driven gear ring 128 is rotatably installed inside the second sealing plate 123 and the second sealing chamber 124, and an active input gear 125 meshing with a driving gear ring 119 is rotatably installed inside the first sealing plate 121 and the first sealing chamber 122; a separation one-way transmission cover 126 and a rotating dial 129 are rotatably installed between the opposite surfaces of the first sealing chamber 122 and the second sealing plate 123, wherein the separation one-way transmission cover 126 is sleeved on the outer side of the rotating dial 129, the separation one-way transmission cover 126 and the active input gear 125 are fixed and synchronously transmitted through a rotating shaft, and the rotating dial 129 and the driven input gear 127 are fixed and synchronously transmitted through a rotating shaft.

[0028] A rotating block 130 is rotatably provided on the inner wall of the separation one-way transmission cover 126. The rotating block 130 is rotatably matched with the end face of the rotating dial 129. Two symmetrically arranged inclined grooves 131 are provided on the circumferential surface of the rotating block 130. A magnetic column 133 is provided between each inclined groove 131 and the inner wall of the separation one-way transmission cover 126 in sliding contact. The circumferential surface of the magnetic column 133 is magnetically contacted with a magnetic lever 132. All second sealing plates 123 are fixedly matched with the rotating dial 129. A screw rod 115 is threadedly sealed at a position coaxial with the first bypass pipe 112 on the inner wall of the second bypass pipe 111. One end of the screw rod 115 located on the inner side of the second bypass pipe 111 is fixedly matched with the sealing ring 116 in the air. One end of the screw rod 115 located on the outer side of the second bypass pipe 111 is fixed with a handle wheel 114.

[0029] The working principle of a novel heavy oil multiphase flowmeter disclosed in the present invention is as follows: the inlet pipe 102 is connected to the heavy oil output end, and then the heavy oil will enter the separation chamber 101, where the heavy oil and gas will be separated under the action of gravity. Since the weight of the heavy oil is greater than that of the air, the heavy oil will enter the lower leakage elbow 108, and the air will enter the auxiliary sieve pipe 104. The length (height) of the auxiliary sieve pipe 104 is set to be at least five times that of the separation chamber 101, so that the partially splashed heavy oil entering the separation chamber 101 can be effectively discharged through the auxiliary sieve pipe 104. 04 enters the exhaust duct 103. The flowing air inside the exhaust duct 103 will cause the pressure inside the exhaust duct 103 to decrease (at the air pressure detection tube 106). This is because the faster the air flows inside the exhaust duct 103, the lower the pressure inside it (the air pressure detection tube 106 is set perpendicular to the axis of the exhaust duct 103). By detecting the pressure inside the air pressure detection tube 106 by the air pressure sensor 105, the flow rate inside the exhaust duct 103 can be determined (the two extreme values ​​of no flow rate and no pressure need to be avoided), and the flow rate can be obtained. The heavy oil entering the lower leakage elbow 108 will flow into the first three-way pipe 109 under the pressure of the separation chamber 101 (a continuous flow of heavy oil will enter the separation chamber 101 from the inlet pipe 102, so there is a continuous pressure inside the separation chamber 101 to promote the flow of air and heavy oil). After entering the flushing and anti-blocking pipe 120, the heavy oil will flow along the gap between the conical limiting block 137 and the inner wall of the flushing and anti-blocking pipe 120. Due to the reduction in cross-sectional area, the flow rate of the heavy oil will increase at this time, thereby accelerating the flow of some solid impurities in the heavy oil, preventing accumulation in the flushing and anti-blocking pipe 120, and preventing accumulation of heavy oil in the liquid flow meter. The liquid flow meter is installed on the output pipeline 107 to calculate the flow of the heavy oil.As time goes by, impurities will accumulate on the surface of the conical limiting block bracket 138 that is provided inside the anti-blocking pipe 120 for supporting the conical limiting block 137 (due to viscous adhesion), and the accumulation will become more and more. If the debris accumulated between two conical limiting block brackets 138 blocks two (or more) of them, the flow rate of the liquid flow meter will decrease, and the internal pressure on the side of the lower leakage elbow 108 will increase. At this time, the one-way valve 113 will be opened under the pressure (the threshold for the opening of the one-way valve 113 is that at least two of the conical limiting block brackets 138 are blocked). At this time, in order to ensure the normal transportation of the heavy oil, part of the heavy oil will enter the first bypass pipe 112, then enter the second bypass pipe 111 through the guide block 117, and then enter the second three-way pipe 110 through the one-way valve 113, so that the normal flow and measurement of the heavy oil can be ensured (in the default state, the guide block 117 and the blocking ring 116 are separated). When the heavy oil enters the second bypass pipe 111 from the first bypass pipe 112, it will impact the driving blade 118 under the action of the guide block 117, thereby driving the driving blade 118 to rotate, and then pass through the guide block 117 to enter the second bypass pipe 111.

[0030] Depending on the characteristics of different conveying media, the drive blade 118 may be attached with media. If the heavy oil attached to the drive blade 118 needs to be cleaned regularly, the structure needs to be changed, such as Figure 2As shown, the handle wheel 114, the screw rod 115, and the blocking ring 116 are installed on one side of the first bypass pipe 112 (the content shown in the figure is to control the blocking state of the blocking ring 116 and the guide block 117 by rotating the handle wheel 114 to select whether to start the unblocking function, because sometimes the viscosity of the liquid is poor and this function is not needed), and then the sealing threaded collar 136 is rotated to separate the second three-way pipe 110 from the second bypass pipe 111, and then the second bypass pipe 111 is rotated to disconnect the second three-way pipe 110 and the second bypass pipe 111, in the one-way The valve 113 prevents the heavy oil inside the second three-way pipe 110 from leaking out (before this, the handle wheel 114 is rotated, the handle wheel 114 drives the screw rod 115 to rotate, the screw rod 115 moves along its own axial direction on the second bypass pipe 111 (the first bypass pipe 112 after the structure is changed), and drives the blocking ring 116 to be sleeved on the guide block 117, so that the second bypass pipe 111 is blocked to prevent the heavy oil in the first bypass pipe 112 from leaking out), and then the internal driving blade 118 is cleaned through the second bypass pipe 111, and reset after the cleaning is completed. The rotation of the driving blade 118 will drive the driving gear ring 119 to rotate, and the driving gear ring 119 will drive the active input gear 125 to rotate, and the active input gear 125 will drive the separation one-way transmission cover 126 to rotate, and the separation one-way transmission cover 126 will drive one of the magnetic pillars 133 in the two symmetrically arranged one-way valves 113 to move in the direction of reducing space in the inclined groove 131 through friction. At this time, the separation one-way transmission cover 126 and the inclined groove 131 will squeeze the magnetic pillar 133, so that the friction between the magnetic pillar 133 and the inner wall of the inclined groove 131 and the separation one-way transmission cover 126 becomes larger and locked. At this time, the magnetic pillar 133 3 rotates synchronously with the separation one-way transmission cover 126, driving the magnetic lever 132 to move. The magnetic lever 132 drives the rotating dial 129 to move. The rotating dial 129 drives the driven input gear 127 to rotate. The driven input gear 127 drives the passive gear ring 128 to rotate. The passive gear ring 128 drives the cleaning plate rotating sleeve 134 and the cleaning plate 135 to rotate. The rotation of the cleaning plate 135 will change the relative position with the conical limiting block bracket 138. At this time, if there is a blocking state between the two conical limiting block brackets 138, the blocking object can be peristalticized by the movable cleaning plate 135 and flushed away under the action of pressure, thereby achieving the purpose of dredging. Each cleaning plate 135 and the conical limiting block bracket 138 are provided with permanent magnets. When there is no dredging work, the cleaning plate 135 and the conical limiting block bracket 138 can attract each other to reset.At this time, the cleaning plate 135 will rotate under the action of the magnet inside the conical limiting block bracket 138, thereby driving the cleaning plate rotating sleeve 134 to rotate, the cleaning plate rotating sleeve 134 drives the passive gear ring 128 to rotate, the passive gear ring 128 drives the driven input gear 127 to rotate, the driven input gear 127 drives the rotating dial 129 to rotate, the rotating dial 129 drives the magnetic lever 132 to rotate, and the magnetic lever 132 drives one of the magnetic columns 133 in the inclined groove 131 toward the direction where the space becomes larger. Move, the squeezing force of the separation one-way transmission cover 126 and the inclined groove 131 on the magnetic column 133 disappears, and the other symmetrically arranged magnetic column 133 will also make the same movement under the friction of the separation one-way transmission cover 126. At this time, the rotating dial 129 drives the magnetic lever 132 and the rotating block 130 to idle in the separation one-way transmission cover 126, so that the separation one-way transmission cover 126 cannot be driven to rotate. At this time, the force required for the magnetic drive of the cleaning plate 135 to rotate can be reduced (the load is less). When the heavy oil flows, it will impact the oncoming cone block 139. The faster the flow rate, the greater the impact force (squeezing force). The pressure is detected by the pressure sensor 140, thereby detecting the flow rate, the purpose of which is to prevent the liquid flow meter set on the output pipeline 107 from failing. Through multiple redundant flow detection, the reliability of the heavy oil flow detection can be effectively guaranteed.

Claims

1. A new type of heavy oil multiphase flow meter, characterized by: The invention comprises a separation chamber (101), wherein the top of the separation chamber (101) is connected to an auxiliary liquid screening pipe (104), the top of the auxiliary liquid screening pipe (104) is connected to an exhaust pipe (103), one end of the exhaust pipe (103) away from the auxiliary liquid screening pipe (104) is horizontally arranged, and one end of the exhaust pipe (103) is connected to an air pressure detection pipe (106) along its radial direction, and an air pressure sensor (105) is arranged inside the air pressure detection pipe (106); A lower leakage elbow (108) is provided at the bottom end of the separation chamber (101), an output pipe (107) is provided on the side of the lower leakage elbow (108), an anti-blocking component is provided in series connection between the output pipe (107) and the lower leakage elbow (108), and an inlet pipe (102) is provided in the middle and upper part of the circumferential surface of the separation chamber (101) along its own radial direction; The anti-blocking component comprises a flushing anti-blocking pipe (120), the two ends of which are connected to the corresponding lower leakage elbow (108) and the output pipe (107) via a first tee pipe (109) and a second tee pipe (110), respectively, and a conical limiting block (137) is fixed in the air at the axial center position of the flushing anti-blocking pipe (120) via a conical limiting block bracket (138).

2. A novel heavy oil multiphase flowmeter according to claim 1, characterized in that: A slit is provided in the middle of the flushing and anti-blocking pipe (120), a passive gear ring (128) is installed in the slit as a rotary seal, and a cleaning plate rotating sleeve (134) is provided on the inner wall of the flushing and anti-blocking pipe (120) at the position of the slit in an embedded manner as a rotary seal, and the same number of cleaning plates (135) as the conical limiting block bracket (138) are fixed on the inner wall of the cleaning plate rotating sleeve (134), and the cleaning plates (135) are in contact and sliding cooperation with the conical limiting block bracket (138).

3. A novel heavy oil multiphase flowmeter according to claim 2, characterized in that: One end of the conical limiting block (137) is arranged in a conical shape, and the other end of the conical limiting block (137) is arranged in a plane. A facing conical block (139) is arranged on the side of the plane, and a pressure sensor (140) is fixedly arranged between the facing conical block (139) and the plane of the conical limiting block (137).

4. A novel heavy oil multiphase flowmeter according to claim 3, characterized in that: Two coaxial second bypass pipes (111) and a first bypass pipe (112) are arranged on the side of the flushing and anti-blocking pipe (120) and parallel to the axial direction of the flushing and anti-blocking pipe (120); a driving gear ring (119) is provided as a rotary seal at the butt ends of the second bypass pipe (111) and the first bypass pipe (112); a driving blade (118) is fixed to the driving gear ring (119) at a position located inside the first bypass pipe (112) and the second bypass pipe (111).

5. A novel heavy oil multiphase flowmeter according to claim 4, characterized in that: The first bypass pipe (112) is connected to the first three-way pipe (109), and the second bypass pipe (111) is connected to the second three-way pipe (110), wherein a one-way valve (113) is provided inside the first bypass pipe (112) to allow liquid to enter the first bypass pipe (112) from the first three-way pipe (109), and a one-way valve (113) is provided at the connection between the second three-way pipe (110) and the second bypass pipe (111) to prevent liquid from entering the second bypass pipe (111) from the second three-way pipe (110); The connection between the second bypass pipe (111) and the second tee pipe (110) adopts an arc-shaped end face, and the center of the arc-shaped end face intersects with the axis of the connection between the first bypass pipe (112) and the second bypass pipe (111), and a sealing threaded collar (136) is provided on the outer threaded sealing sleeve at the connection between the arc-shaped end faces of the second tee pipe (110) and the second bypass pipe (111).

6. A novel heavy oil multiphase flowmeter according to claim 5, characterized in that: A guide block (117) coaxial with the first bypass pipe (112) is fixed in the air on the inner wall of the first bypass pipe (112) via a guide block bracket (141); a blocking ring (116) is slidably arranged on the inner wall of the second bypass pipe (111); the blocking ring (116) can be sleeved on the circumferential surface of the guide block (117) to block the communication path from the first bypass pipe (112) to the second bypass pipe (111); a circular array of driving blades (118) is arranged in a gap between the inner wall of the first bypass pipe (112) and the circumferential surface of the guide block (117).

7. A novel heavy oil multiphase flowmeter according to claim 6, characterized in that: A second sealing plate (123) and a second sealing chamber (124) are fixedly sealed on both sides of a slit provided in the middle of the scouring and anti-blocking pipe (120), and a first sealing chamber (122) is fixedly sealed on both sides of the butt ends of the second bypass pipe (111) and the first bypass pipe (112). A first sealing plate (121) is fixedly sealed on the side of the first sealing chamber (122). The first sealing plate (121) and the second bypass pipe (111) are matched in a rotating seal, wherein the second sealing plate (123) and the second sealing chamber (124) are fixedly sealed with the outer surface of the first bypass pipe (112), and the first sealing plate (121) and the first sealing chamber (122) are fixedly sealed with the outer surface of the scouring and anti-blocking pipe (120).

8. A novel heavy oil multiphase flowmeter according to claim 7, characterized in that: A driven input gear (127) meshing with a driven gear ring (128) is rotatably mounted inside the second sealing plate (123) and the second sealing chamber (124), and a driving input gear (125) meshing with a driving gear ring (119) is rotatably mounted inside the first sealing plate (121) and the first sealing chamber (122); a separation one-way transmission cover (126) and a rotating dial (129) are rotatably mounted between opposite surfaces of the first sealing chamber (122) and the second sealing plate (123), wherein the separation one-way transmission cover (126) is sleeved on the outside of the rotating dial (129), the separation one-way transmission cover (126) and the driving input gear (125) are fixed and synchronously driven via a rotating shaft, and the rotating dial (129) and the driven input gear (127) are fixed and synchronously driven via a rotating shaft.

9. A novel heavy oil multiphase flowmeter according to claim 8, characterized in that: A rotating block (130) is rotatably mounted on the inner wall of the separation one-way transmission cover (126). The rotating block (130) is rotatably matched with the end surface of the rotating dial (129). Two symmetrically arranged inclined grooves (131) are provided on the circumferential surface of the rotating block (130). A magnetic column (133) is provided between each inclined groove (131) and the inner wall of the separation one-way transmission cover (126) in sliding contact. A magnetic lever (132) is magnetically matched on the circumferential surface of the magnetic column (133). All second sealing plates (123) are fixedly matched with the rotating dial (129).

10. A novel heavy oil multiphase flowmeter according to claim 9, characterized in that: A screw rod (115) is provided on the inner wall of the second bypass pipe (111) at a position coaxial with the first bypass pipe (112) for threaded sealing. One end of the screw rod (115) located inside the second bypass pipe (111) is fixedly matched with a sealing ring (116) in the air. One end of the screw rod (115) located outside the second bypass pipe (111) is fixed with a handle wheel (114).

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