A new type of multiphase flowmeter for heavy oil

Abstract

The present invention discloses a novel heavy oil multiphase flowmeter, which relates to the technical field of flowmeters. The present invention has a separation chamber, an auxiliary liquid screening pipe and an exhaust pipe for efficient gas-liquid separation. The anti-blocking assembly composed of a flushing anti-blocking pipe, a conical limiting block and a rotatable cleaning flap prevents the accumulation and blockage of solid impurities. The setting of the pressure sensor realizes multiple redundant flow measurements of the gas phase and the liquid phase, improving the reliability of the data. The device design allows the cleaning and maintenance of key components without shutting down the machine, reducing the operating cost and improving the efficiency. This flowmeter overcomes the shortcomings of incomplete gas-liquid separation, easy blockage, difficult maintenance and inaccurate measurement in the prior art. Through the self-cleaning and anti-blocking structure, multiple flow measurements and online maintenance functions, it provides a highly reliable and multifunctional flow measurement device suitable for heavy oil exploitation and transportation.

Description

Technical Field

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

[0002] Existing heavy oil multiphase flow meters 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 make it easy to accumulate inside the pipeline and the flow meter, causing blockage. Existing equipment usually lacks an effective on-line cleaning and anti-blocking mechanism, is difficult to maintain, requires shutdown for cleaning, and affects production efficiency. In addition, traditional flow meters often rely on a single measurement method, lack redundancy, and cannot guarantee the 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] To overcome the defects of the above-mentioned prior art, the present invention provides the following technical solution: A novel heavy oil multiphase flow meter, including a separation chamber. An auxiliary liquid screening pipe is connected in communication at the top of the separation chamber. The top end of the auxiliary liquid screening pipe is connected to an exhaust pipe. One end of the exhaust pipe away from the auxiliary liquid screening pipe is horizontally arranged, and a pressure detection pipe is connected in communication along the radial direction of the horizontally arranged exhaust pipe. A pressure sensor is arranged inside the pressure detection pipe. A downward leakage elbow is arranged at the bottom end of the separation chamber. An output pipe is arranged on the side of the downward leakage elbow. An anti-blocking component is connected in series and communicated between the output pipe and the downward leakage elbow. An inlet pipe is connected in communication along the radial direction in the middle and upper part of the circumferential surface of the separation chamber. The anti-blocking component includes a flushing anti-blocking pipe. The two ends of the flushing anti-blocking pipe are respectively connected and communicated with the corresponding downward leakage elbow and output pipe through a first three-way pipe and a second three-way pipe. A conical limiting block is fixed in the air through a conical limiting block bracket at the central axis position inside the flushing anti-blocking pipe.

[0004] Preferably, a gap is arranged in the middle of the flushing anti-blocking pipe. A passive gear ring is rotatably and sealingly installed in the gap. And a cleaning dial rotating sleeve is rotatably and sealingly arranged by embedding at the position of the inner wall of the flushing anti-blocking pipe corresponding to the gap. The same number of cleaning dials as the conical limiting block brackets are fixed on the inner wall of the cleaning dial rotating sleeve. The cleaning dials are in contact and sliding fit with the conical limiting block brackets.

[0005] Preferably, one end of the conical limiting block is conical, and the other end is flat. A facing cone block is arranged on the side of the flat surface. A pressure sensor is fixedly arranged between the facing cone block and the flat surface of the conical limiting block.

[0006] Preferably, two coaxial second bypass pipes and a first bypass pipe are arranged parallel to the axis of the flushing anti-blocking pipe on the side of the flushing anti-blocking pipe. A driving gear ring is rotationally sealed at the docking end of the second bypass pipe and the first bypass pipe. A driving paddle is fixed at a position inside the first bypass pipe and the second bypass pipe where the driving gear ring is located.

[0007] Preferably, the first bypass pipe is communicated with the first three-way pipe, and the second bypass pipe is communicated with the second three-way pipe. 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. A one-way valve is arranged at the connection position between the inside of 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. 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. A sealing thread sleeve is sleeved on the outside of the arc-shaped end face connection between the second three-way pipe and the second bypass pipe in a threaded sealing manner.

[0008] Preferably, a flow guide block coaxial with the first bypass pipe is fixed on the inner wall of the first bypass pipe through a flow guide block bracket. A plugging ring is slidably arranged on the inner wall of the second bypass pipe. The plugging ring can be sleeved on the circumferential surface of the flow guide block to block the communication path from the first bypass pipe to the second bypass pipe. The driving paddles are arranged in a circular array in the gap between the inner wall of the first bypass pipe and the circumferential surface of the flow guide block.

[0009] Preferably, a second sealing plate and a second sealing chamber are respectively fixed and sealed on both sides of the gap arranged in the middle of the flushing anti-blocking pipe. First sealing chambers are respectively fixed and sealed on both sides of the docking end of the second bypass pipe and the first bypass pipe. A first sealing plate is fixed and sealed on the side of the first sealing chamber. The first sealing plate and the second bypass pipe are in a rotational sealing fit. The second sealing plate and the second sealing chamber are both fixedly sealed with the outer surface of the first bypass pipe. The first sealing plate and the first sealing chamber are both fixedly sealed with the outer surface of the flushing anti-blocking pipe.

[0010] Preferably, a driven input gear meshing and driving with a passive gear ring is rotatably installed inside the second sealing plate and the second sealing chamber. A driving input gear meshing and driving with the driving gear ring is rotatably installed inside the first sealing plate and the first sealing chamber. A separating 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. The separating one-way transmission cover is sleeved on the outside of the rotating dial. The separating one-way transmission cover and the driving input gear are fixedly and synchronously driven through a rotating shaft. The rotating dial and the driven input gear are fixedly and synchronously driven through a rotating shaft.

[0011] Preferably, a rotating block is rotatably arranged on the inner wall of the separating one-way transmission cover. The rotating block is rotatably fitted with the end face of the rotating dial. Two symmetrically arranged inclined groove are formed on the circumferential surface of the rotating block. A magnetic column is slidably and contact-fitted between each inclined groove and the inner wall of the separating one-way transmission cover. The circumferential surface of the magnetic column is magnetically contact-fitted with a magnetic lever. All the second sealing plates are fixedly fitted with the rotating dial.

[0012] Preferably, a lead screw is thread-sealed and fitted coaxially with the first bypass pipe on the inner wall of the second bypass pipe. One end of the lead screw located inside the second bypass pipe is fixedly fitted with a plugging ring in a suspended manner. A handwheel is fixed to the other end of the lead screw located outside the second bypass pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) By arranging a conical limiting block and a rotatable cleaning dial plate inside the flushing anti-blocking pipe, the present invention realizes the self-cleaning function of the pipeline interior. The gap between the conical limiting block and the pipe wall is reduced, increasing the flow rate of the viscous oil and preventing the deposition of solid impurities. The cleaning dial plate can rotate to remove the impurities accumulated on the conical limiting block support, and can play a role in dredging 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) By arranging an auxiliary liquid screening pipe with a height at least five times that of the separation chamber, the present invention effectively prevents the viscous oil from splashing into the exhaust pipeline, ensuring the thoroughness of gas-liquid separation. This design improves the accuracy of gas-phase and liquid-phase flow measurement, avoiding measurement errors caused by mutual mixing. The effective separation under the action of gravity enables the viscous oil and gas to enter their respective pipelines, ensuring the accuracy of subsequent measurement and processing; (3) Pressure sensors are arranged in both the gas and liquid paths of the present invention to realize redundant measurement of the flow rate. The air pressure sensor in the exhaust pipeline and the pressure sensor at the conical limiting block provide dual flow detection means. This redundant design improves the reliability of the data. Description of the Drawings

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

[0015] Figure 2 It is a schematic diagram of the structure at the flushing anti-blocking pipe of the present invention.

[0016] Figure 3 It is a schematic diagram of the structure at the diversion block of the present invention.

[0017] Figure 4 For the present invention Figure 3 The schematic diagram of the structure at position A in

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

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

[0020] Figure 7 Schematic diagram of the internal structure of the flushing and anti-blocking pipe of the present invention.

[0021] Figure 8 Schematic diagram of the structure at the oncoming conical block of the present invention.

[0022] In the figure: 101 - separation chamber; 102 - inlet pipe; 103 - exhaust pipe; 104 - auxiliary liquid screening pipe; 105 - air pressure sensor; 106 - air pressure detection pipe; 107 - output pipe; 108 - downward leakage elbow; 109 - first three-way pipe; 110 - second three-way pipe; 111 - second bypass pipe; 112 - first bypass pipe; 113 - one-way valve; 114 - handle wheel; 115 - lead screw; 116 - sealing ring; 117 - guide block; 118 - driving paddle; 119 - driving gear ring; 120 - flushing and anti-blocking pipe; 121 - first sealing plate; 122 - 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 - inclined groove; 132 - magnetic lever; 133 - magnetic column; 134 - cleaning plate rotating sleeve; 135 - cleaning plate; 136 - sealing threaded sleeve ring; 137 - conical limiting block; 138 - conical limiting block bracket; 139 - oncoming conical block; 140 - pressure sensor; 141 - guide block bracket. Specific embodiments

[0023] The following will combine with the attached Figure 1-8 drawings and further illustrate the technical solutions of the present invention through specific embodiments.

[0024] The present invention provides a novel heavy oil multiphase flowmeter, which includes a separation chamber 101. An auxiliary liquid screening pipe 104 is connected and arranged at the top of the separation chamber 101. The top end 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 a pressure detection pipe 106 is connected and arranged along the radial direction of the horizontally arranged exhaust pipe 103. A pressure sensor 105 is arranged inside the pressure detection pipe 106. A downward leakage elbow 108 is arranged at the bottom end of the separation chamber 101. An output pipe 107 is arranged on the side of the downward leakage elbow 108. An anti-blocking component is connected in series between the output pipe 107 and the downward leakage elbow 108. An inlet pipe 102 is connected and arranged along the radial direction in the middle and upper part of the circumferential surface of the separation chamber 101. The anti-blocking component includes a flushing anti-blocking pipe 120. The two ends of the flushing anti-blocking pipe 120 are respectively connected and arranged to the corresponding downward leakage elbow 108 and output pipe 107 through a first three-way pipe 109 and a second three-way pipe 110. A conical limiting block 137 is fixedly arranged in the center position inside the flushing anti-blocking pipe 120 through a conical limiting block bracket 138 in a suspended manner.

[0025] A gap is arranged in the middle of the flushing anti-blocking pipe 120. A passive gear ring 128 is rotationally and sealedly installed in the gap. And a cleaning flap rotating sleeve 134 is rotationally and sealedly arranged in an embedded manner at the position of the inner wall of the flushing anti-blocking pipe 120 where the gap is located. The same number of cleaning flaps 135 as that of the conical limiting block bracket 138 are fixed on the inner wall of the cleaning flap rotating sleeve 134. The cleaning flaps 135 are in contact and sliding fit with the conical limiting block bracket 138. One end of the conical limiting block 137 is conically arranged, and the other end of the conical limiting block 137 is flat. A face cone block 139 is arranged on the side of the flat surface. A pressure sensor 140 is fixedly arranged between the face cone block 139 and the flat surface of the conical limiting block 137.

[0026] There are two coaxial second bypass pipes 111 and first bypass pipes 112 arranged parallel to the axis of the flushing anti-blocking pipe 120 on the side of the flushing anti-blocking pipe 120. The docking ends of the second bypass pipes 111 and the first bypass pipes 112 are rotatably sealed with a driving gear ring 119. A driving paddle 118 is fixedly arranged at a position inside the first bypass pipe 112 and the second bypass pipe 111 where the driving gear ring 119 is located. The first bypass pipe 112 is communicated with the first three-way pipe 109, and the second bypass pipe 111 is communicated with the second three-way pipe 110. 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. A one-way valve 113 is arranged at the position where the inside of the second three-way pipe 110 is connected to 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 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. A sealing thread sleeve ring 136 is thread-sealed and sleeved on the outside of the arc-shaped end face connection between the second three-way pipe 110 and the second bypass pipe 111. A flow guide block 117 coaxial with the first bypass pipe 112 is fixedly arranged on the inner wall of the first bypass pipe 112 through a flow guide block bracket 141. A plugging ring 116 is slidably arranged on the inner wall of the second bypass pipe 111. The plugging ring 116 can be sleeved on the circumferential surface of the flow guide block 117 to block the communication path from the first bypass pipe 112 to the second bypass pipe 111. The driving paddles 118 are arranged in a circular array in the gap between the inner wall of the first bypass pipe 112 and the circumferential surface of the flow guide block 117.

[0027] On both sides of the gap provided in the middle of the flushing anti-blocking pipe 120, a second sealing plate 123 and a second sealing chamber 124 are respectively fixedly sealed. On both sides of the butt joint ends of the second bypass pipe 111 and the first bypass pipe 112, a first sealing chamber 122 is respectively fixedly sealed. On the side of the first sealing chamber 122, a first sealing plate 121 is fixedly sealed. The first sealing plate 121 and the second bypass pipe 111 adopt a rotational sealing fit mode. Among them, both 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 both the first sealing plate 121 and the first sealing chamber 122 are fixedly sealed with the outer surface of the flushing anti-blocking pipe 120. An output gear 127 meshing and driving with the passive gear ring 128 is rotatably installed inside the second sealing plate 123 and the second sealing chamber 124, and an input gear 125 meshing and driving with the driving gear ring 119 is rotatably installed inside the first sealing plate 121 and the first sealing chamber 122; A separating one-way transmission cover 126 and a rotary dial 129 are rotatably installed between the opposite surfaces of the first sealing chamber 122 and the second sealing plate 123. Among them, the separating one-way transmission cover 126 is sleeved on the outer side of the rotary dial 129. The separating one-way transmission cover 126 and the input gear 125 are fixedly and synchronously driven through a rotating shaft, and the rotary dial 129 and the output gear 127 are fixedly and synchronously driven through a rotating shaft.

[0028] A rotating block 130 is rotatably arranged on the inner wall of the separating one-way transmission cover 126. The rotating block 130 is rotatably matched with the end face of the rotary dial 129. Two symmetrically arranged inclined groove 131 are formed on the circumferential surface of the rotating block 130. A magnetic column 133 is slidably contacted and matched between each inclined groove 131 and the inner wall of the separating one-way transmission cover 126. A magnetic rod 132 is magnetically contacted and matched with the circumferential surface of the magnetic column 133. All the second sealing plates 123 are fixedly matched with the rotary dial 129. A lead screw 115 is threadedly sealed and matched with the inner wall of the second bypass pipe 111 at a position coaxial with the first bypass pipe 112. One end of the lead screw 115 located inside the second bypass pipe 111 is fixedly and spacedly matched with a plugging ring 116, and a handle wheel 114 is fixed to the end of the lead screw 115 located outside the second bypass pipe 111.

[0029] The working principle of a novel heavy oil multiphase flowmeter disclosed by the present invention is as follows: Connect the inlet pipe 102 to the heavy oil output end, and then the heavy oil will enter the separation chamber 101. In the separation chamber 101, under the action of gravity, the heavy oil and gas will be separated. Since the weight of the heavy oil is greater than that of air, the heavy oil will enter the lower leakage elbow 108, while the air will enter the auxiliary liquid screening pipe 104. The length (height) of the auxiliary liquid screening pipe 104 is set to be at least five times that of the separation chamber 101, so that part of the splashed heavy oil entering the interior of the separation chamber 101 can effectively enter the exhaust pipe 103 through the auxiliary liquid screening pipe 104. The flowing air inside the exhaust pipe 103 will cause the pressure inside the exhaust pipe 103 to decrease (for the air pressure detection pipe 106). This is because the faster the flow rate of the air inside the exhaust pipe 103, the lower the pressure inside it (the air pressure detection pipe 106 is arranged perpendicular to the axis of the exhaust pipe 103). By detecting the pressure inside the air pressure detection pipe 106 with the air pressure sensor 105, the flow rate inside the exhaust pipe 103 can be judged (the two extreme values of no flow rate and no pressure need to be avoided), and then 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 push of the pressure inside the separation chamber 101 (there will be a continuous flow of heavy oil from the inlet pipe 102 into the separation chamber 101, so there is a continuous pressure inside the separation chamber 101 to push the flow of air and heavy oil). After the heavy oil enters the scouring anti-blocking pipe 120, it will flow along the gap between the conical limiting block 137 and the inner wall of the scouring anti-blocking pipe 120. Due to the reduction of the 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 and preventing them from accumulating inside the scouring anti-blocking pipe 120. At the same time, it prevents the heavy oil from accumulating in the liquid flowmeter. A liquid flowmeter is installed on the output pipe 107 to calculate the flow rate of the heavy oil.Over time, impurities will accumulate on the surface of the conical restriction block bracket 138 inside the flushing anti-blocking pipe 120, which is used to support the conical restriction block 137 (due to the sticky adhesion effect), and the accumulation will become more and more. If the debris accumulated between two conical restriction block brackets 138 blocks two (or more) of them, the flow rate of the liquid flowmeter will decrease at this time, and it will cause the internal pressure on the side of the downward leakage elbow 108 to increase. At this time, under the push of the pressure, the one-way valve 113 will be opened (the threshold for the one-way valve 113 to open is that at least two of the conical restriction block brackets 138 are blocked). At this time, in order to ensure the normal transportation of heavy oil, part of the heavy oil will enter the first bypass pipe 112 at this time, 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. This can ensure the normal flow and measurement of heavy oil (in the default state, the guide block 117 is separated from the blocking ring 116). When the heavy oil enters the second bypass pipe 111 from the first bypass pipe 112, it will impact and drive the paddle 118 under the action of the guide block 117, thereby driving the paddle 118 to rotate, and then pass through the guide block 117 and enter the second bypass pipe 111.

[0030] According to the characteristics of different transportation media, the medium may adhere to the driving paddle 118. If it is necessary to regularly clean the heavy oil adhering to the driving paddle 118, the structure needs to be changed, such as Figure 2As shown, the handle wheel 114, the lead screw 115, and the sealing ring 116 are installed on one side of the first bypass pipe 112 (the content shown in the figure is to control the sealing state of the sealing ring 116 and the diversion block 117 by rotating the handle wheel 114 to select whether to turn on the function of dredging and blocking. Sometimes, the viscosity of the liquid is poor and this function is not required). At this time, rotate the rotary sealing threaded sleeve ring 136 to separate the second three-way pipe 110 from the second bypass pipe 111, and then rotate the second bypass pipe 111 to disconnect the second three-way pipe 110 and the second bypass pipe 111. Under the action of the one-way valve 113, the viscous oil inside the second three-way pipe 110 will not leak (before that, rotate the handle wheel 114, and the handle wheel 114 drives the lead screw 115 to rotate. The lead screw 115 moves along its own axis on the second bypass pipe 111 (the first bypass pipe 112 after the structure is changed), driving the sealing ring 116 to be sleeved on the diversion block 117, so that the second bypass pipe 111 is sealed to prevent the viscous oil in the first bypass pipe 112 from leaking). Then, clean the internal drive paddle 118 through the second bypass pipe 111, and reset it after cleaning. The rotation of the drive paddle 118 will drive the drive gear ring 119 to rotate. The drive gear ring 119 drives the active input gear 125 to rotate. The active input gear 125 drives the separating one-way transmission cover 126 to rotate. The separating one-way transmission cover 126 drives one of the magnetic columns 133 in one of the two symmetrically arranged one-way valves 113 to move in the inclined groove 131 in the direction of decreasing space through friction. At this time, the separating one-way transmission cover 126 and the inclined groove 131 will squeeze the magnetic column 133, making the friction between the magnetic column 133 and the inclined groove 131 and the inner wall of the separating one-way transmission cover 126 become larger and achieve locking. At this time, the magnetic column 133 rotates synchronously with the separating one-way transmission cover 126, driving the magnetic lever 132 to move. The magnetic lever 132 drives the rotary dial 129 to move. The rotary 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 paddle rotating sleeve 134 and the cleaning paddle 135 to rotate. The rotation of the cleaning paddle 135 will change the relative position with the conical limiting block bracket 138. At this time, if there is a sealing state between the two conical limiting block brackets 138, the movable cleaning paddle 135 can peristalsis the blockage and wash it away under the action of pressure, so as to achieve the purpose of dredging. A permanent magnet is provided in each of the cleaning paddle 135 and the conical limiting block bracket 138. When there is no dredging work, the cleaning paddle 135 and the conical limiting block bracket 138 can attract each other and reset.At this time, the cleaning dial 135 will rotate under the action of the magnet inside the conical limiting block bracket 138, thereby driving the rotation of the cleaning dial rotating sleeve 134. The cleaning dial 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 to move in the inclined plane groove 131 in the direction where the space becomes larger. The extrusion force of the kill-drop separation one-way transmission cover 126 on the inclined plane groove 131 on the magnetic column 133 disappears, and the other symmetrically arranged magnetic column 133 will also move in the same way under the friction force 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 rotate idly 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 cleaning dial 135 to rotate under magnetic force drive can be reduced (less load). When the viscous oil flows, it will impact the oncoming cone block 139. The faster the flow rate, the greater the impact force (extrusion force). The pressure is detected by the pressure sensor 140 to detect the flow rate, aiming to prevent the liquid flow meter installed on the output pipeline 107 from failing. Through multiple redundant flow detections, the reliability of the viscous oil flow detection can be effectively ensured.

Claims

1. A novel heavy oil multiphase flowmeter, characterized in that: It includes a separation chamber (101). An auxiliary liquid screening pipe (104) is connected and arranged at the top of the separation chamber (101). The top end of the auxiliary liquid screening pipe (104) is connected to an exhaust pipe (103). One end of the exhaust pipe (103) far from the auxiliary liquid screening pipe (104) is horizontally arranged, and a pressure detection pipe (106) is connected and arranged along the radial direction of the horizontally arranged exhaust pipe (103). A pressure sensor (105) is arranged inside the pressure detection pipe (106). A downward leakage elbow pipe (108) is arranged at the bottom end of the separation chamber (101). An output pipe (107) is arranged on the side of the downward leakage elbow pipe (108). An anti-blocking component is connected and arranged in series between the output pipe (107) and the downward leakage elbow pipe (108). An inlet pipe (102) is connected and arranged along the radial direction in the middle and upper part of the circumferential surface of the separation chamber (101). The anti-blocking component includes a flushing anti-blocking pipe (120). The two ends of the flushing anti-blocking pipe (120) are respectively connected and arranged to the corresponding downward leakage elbow pipe (108) and output pipe (107) through a first three-way pipe (109) and a second three-way pipe (110). A conical limiting block (137) is fixedly installed in the inner axial center position of the flushing anti-blocking pipe (120) through a conical limiting block bracket (138). A gap is arranged in the middle of the flushing anti-blocking pipe (120). A passive gear ring (128) is rotatably and sealedly installed in the gap. And a cleaning paddle rotating sleeve (134) is rotatably and sealedly arranged by embedding at the position of the inner wall of the flushing anti-blocking pipe (120) where the gap is located. The same number of cleaning paddles (135) as the conical limiting block bracket (138) are fixed on the inner wall of the cleaning paddle rotating sleeve (134). The cleaning paddles (135) are in contact and sliding fit with the conical limiting block bracket (138). One end of the conical limiting block (137) is conically arranged, and the other end of the conical limiting block (137) is flat. A face cone block (139) is arranged on the side of the flat surface. A pressure sensor (140) is fixedly arranged between the face cone block (139) and the flat surface of the conical limiting block (137).

2. The novel heavy oil multiphase flowmeter according to claim 1, wherein: Two coaxial second bypass pipes (111) and first bypass pipes (112) are arranged on the side of the flushing anti-blocking pipe (120) parallel to the axis of the flushing anti-blocking pipe (120). A driving gear ring (119) is rotatably and sealedly arranged at the docking end of the second bypass pipe (111) and the first bypass pipe (112). A driving paddle (118) is fixed at the position of the driving gear ring (119) inside the first bypass pipe (112) and the second bypass pipe (111).

3. The novel heavy oil multiphase flowmeter according to claim 2, wherein: The first bypass pipe (112) is communicatively arranged with the first three-way pipe (109), and the second bypass pipe (111) is communicatively arranged with the second three-way pipe (110). A check 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). A check valve (113) is arranged at the connection position between the inside of 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 three-way pipe (110) has an arc-shaped end face, and the center of the arc-shaped end face intersects with the axis at the connection of the first bypass pipe (112) and the second bypass pipe (111). A sealing threaded collar (136) is thread-sealed outside the arc-shaped end face connection of the second three-way pipe (110) and the second bypass pipe (111).

4. A novel heavy oil multiphase flowmeter according to claim 3, characterized in that: A flow guide block (117) coaxial with the first bypass pipe (112) is fixedly installed inside the first bypass pipe (112) through a flow guide block bracket (141). A plugging ring (116) is slidably arranged on the inner wall of the second bypass pipe (111). The plugging ring (116) can be sleeved on the circumferential surface of the flow guide block (117) to block the communication path from the first bypass pipe (112) to the second bypass pipe (111). Driving blades (118) are circularly arrayed in the gap between the inner wall of the first bypass pipe (112) and the circumferential surface of the flow guide block (117).

5. A novel heavy oil multiphase flowmeter according to claim 4, characterized in that: On both sides of the gap arranged in the middle of the scouring and anti-blocking pipe (120), a second sealing plate (123) and a second sealing chamber (124) are respectively fixedly sealed. On both sides of the butt joint ends of the second bypass pipe (111) and the first bypass pipe (112), a first sealing chamber (122) is respectively fixedly sealed. 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 in a rotational sealing fit. 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 scouring and anti-blocking pipe (120).

6. The novel heavy oil multiphase flowmeter according to claim 5, wherein: Inside the second sealing plate (123) and the second sealing chamber (124), a driven input gear (127) that meshes and drives with the passive gear ring (128) is rotatably installed. Inside the first sealing plate (121) and the first sealing chamber (122), a driving input gear (125) that meshes and drives with the driving gear ring (119) is rotatably installed; between the opposite surfaces of the first sealing chamber (122) and the second sealing plate (123), a separating one-way transmission cover (126) and a rotary dial (129) are rotatably installed. The separating one-way transmission cover (126) is sleeved outside the rotary dial (129). The separating one-way transmission cover (126) and the driving input gear (125) are fixedly and synchronously driven through a rotating shaft, and the rotary dial (129) and the driven input gear (127) are fixedly and synchronously driven through a rotating shaft.

7. A novel heavy oil multiphase flowmeter according to claim 6, characterized in that: On the inner wall of the separating one-way transmission cover (126), a rotating block (130) is rotatably arranged. The rotating block (130) is rotationally matched with the end face of the rotary dial (129). On the circumferential surface of the rotating block (130), two symmetrically arranged inclined groove (131) are formed. Between each inclined groove (131) and the inner wall of the separating one-way transmission cover (126), a magnetic column (133) is slidably and contactably arranged. The circumferential surface of the magnetic column (133) is magnetically contactably matched with a magnetic lever (132). All the second sealing plates (123) are fixedly matched with the rotary dial (129).

8. A novel heavy oil multiphase flowmeter according to claim 7, characterized in that: On the inner wall of the second bypass pipe (111) at a position coaxial with the first bypass pipe (112), a lead screw (115) is threadedly and sealingly arranged. One end of the lead screw (115) located inside the second bypass pipe (111) is fixedly and spacedly matched with a plugging ring (116). One end of the lead screw (115) located outside the second bypass pipe (111) is fixed with a hand wheel (114).

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