Target flowmeter for high-viscosity oil flow

Abstract

The invention relates to the technical field of flow measuring instruments, and discloses a target flowmeter for high-viscosity oil flow, which comprises a fixed support, a flange pipe assembly is arranged at the bottom of the fixed support, a bottom shell is arranged at the top of the fixed support, a fixed sleeve and a sealing washer are arranged in the fixed support, and the flange pipe assembly is arranged in the fixed sleeve. An elastic reset piece is arranged at the lower end of the fixing sleeve, an elastic reset piece seat is arranged at the bottom of the elastic reset piece, a transmission shaft is arranged in the fixing sleeve, a target piece is arranged at the bottom of the transmission shaft, a sensor mounting seat is arranged in the bottom shell, and a cover shell is arranged at the top of the bottom shell. According to the target flow meter for large-viscosity oil flow, the streamline target piece is matched with the edge fillet passivation treatment of the target piece, the adhesive force of large-viscosity oil liquid is reduced from the source, the problem that oil sludge is hung on the wall and accumulated is solved, the effective stress area of the target piece is kept stable in the long-term operation process, and the service life of the target piece is prolonged. The problem of measurement signal drifting caused by oil sticking and scale depositing of a conventional flowmeter is solved.

Description

Technical Field

[0001] This invention relates to the field of flow measurement instrument technology, specifically a target flow meter for high viscosity oil flow. Background Technology

[0002] Target flow meters are measuring devices that rely on hydrodynamic forces to generate thrust on a target plate, and calculate the fluid flow rate by detecting the magnitude of the thrust. Due to their simple structure, resistance to impurities, and suitability for low Reynolds number fluids, they are often used for flow measurement of high-viscosity media. However, conventional target flow meters have many compatibility defects when applied to the flow detection of high-viscosity oils, making it difficult to meet the requirements for accurate and stable measurement.

[0003] While traditional target-type flow meters offer some adaptability to high-viscosity media, they generally suffer from insufficient reliability of dynamic sealing structures, leading to media leakage over long-term use; large gaps and high losses in the force transmission path result in low sensitivity; and the lack of temperature compensation mechanisms means that the viscosity of high-viscosity oil varies significantly with temperature, directly causing excessive flow measurement errors and making them unsuitable for the long-term stable metering requirements in industrial settings. Therefore, developing a target-type flow meter specifically designed for high-viscosity oils that features reliable sealing, stable accuracy, and temperature compensation has significant practical application value.

[0004] Currently, there is a lack of improved technologies for target flow meters specifically designed for high viscosity oils. Existing products mostly use conventional structural optimizations without making targeted improvements from core perspectives such as anti-sticking, anti-sludge, signal compensation, and flow field adaptation. As a result, they cannot completely solve the problems of unstable accuracy, high failure rate, and frequent maintenance in the measurement of high viscosity oils. Therefore, a target flow meter for high viscosity oil flow is proposed to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a target-type flow meter for high-viscosity oil flow, which has advantages such as high viscosity oil adhesion and accumulation, signal drift, low accuracy, and operational lag during the measurement and use of target-type flow meters.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a target-type flow meter for high viscosity oil flow, comprising a fixed support, a flange pipe assembly at the bottom of the fixed support, a bottom shell at the top of the fixed support, a fixed sleeve and a sealing gasket inside the fixed support, an elastic reset member at the lower end of the fixed sleeve, an elastic reset member seat at the bottom of the elastic reset member, a drive shaft inside the fixed sleeve, a target plate at the bottom of the drive shaft, a sensor mounting base inside the bottom shell, a cover shell at the top of the bottom shell, a tension / compression sensor fixedly connected to the sensor mounting base, and a pin on one side of the tension / compression sensor.

[0007] Furthermore, the top of the fixed sleeve is threaded with a tightening screw, the top of the drive shaft is provided with an end cap, the top of the end cap is convex, and the side of the tightening screw near the end cap is provided with a groove that matches the top of the end cap.

[0008] Furthermore, a temperature sensor is installed inside the drive shaft.

[0009] Furthermore, the fixed sleeve has a through groove inside, and the size of the through groove is adapted to the size of the ejector pin, and the end of the ejector pin is movably connected to the drive shaft.

[0010] Furthermore, the elastic reset element is disposed on the outer surface of the transmission shaft, the interior of the fixed support is a sealed cavity, and the elastic reset element can be a bellows.

[0011] Furthermore, the target plate has a symmetrical streamlined structure, and the surface curvature of the target plate is adapted to the flow direction of high viscosity oil, which effectively reduces oil adhesion and accumulation, while reducing fluid flow resistance and avoiding measurement errors caused by the formation of local eddies in high viscosity oil.

[0012] Compared with the prior art, the present invention provides a target flow meter for high viscosity oil flow rate, which has the following advantages: 1. This target-type flow meter for high-viscosity oil uses a streamlined target plate with rounded corners to reduce the adhesion of high-viscosity oil at the source, eliminating the problem of sludge buildup on the walls. During long-term operation, the effective force-bearing area of ​​the target plate remains stable, solving the problem of measurement signal drift caused by oil and scale buildup in conventional flow meters.

[0013] 2. This target-type flow meter for high-viscosity oil uses a nested composite sealing structure and a bellows seat adapted to high-viscosity media as an elastic reset component. This not only completely blocks the media leakage channel, but also prevents sludge from accumulating in the sealing gap and jamming the target rod. The bellows is responsive and the reset force is not affected by the viscosity of the media. The drive shaft runs smoothly without jamming throughout the entire process. The overall failure rate of the equipment is significantly reduced, the daily maintenance cycle is greatly extended, and it is suitable for long-term continuous industrial metering conditions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a target-type flow meter for high viscosity oil flow rate proposed in this invention. Figure 2 This is a schematic diagram of the target plate structure of a target-type flow meter for high viscosity oil flow rate proposed in this invention; Figure 3 This is a cross-sectional view of a target-type flow meter for high viscosity oil flow rate proposed in this invention. Figure 4 This is a front view of a target-type flow meter for high-viscosity oil flow rate proposed in this invention.

[0015] In the diagram: 100 Fixed support, 101 Base shell, 102 Sensor mounting base, 103 Tension / compression sensor, 104 Ejector pin, 105 Cover shell, 106 Tightening screw, 107 End cap, 108 Fixed sleeve, 109 Sealing gasket, 110 Elastic reset element, 111 Elastic reset element seat, 112 Drive shaft, 113 Target plate, 114 Flange pipe assembly, 115 Temperature sensor. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1-4 A target-type flow meter for high-viscosity oil flow rate. It includes a fixed support 100, a flange pipe assembly 114 at the bottom of the fixed support 100, and a base shell 101 at the top of the fixed support 100. The flange pipe assembly 114 serves as the core fluid channel and is directly connected to the high-viscosity oil delivery pipeline through the flange.

[0018] The fixed support 100 is provided with a fixed sleeve 108 and a sealing gasket 109 inside. The lower end of the fixed sleeve 108 is provided with an elastic reset member 110. The elastic reset member 110 can be a bellows or other elastic reset members. The bottom of the elastic reset member 110 is provided with an elastic reset member seat 111. The fixed sleeve 108 is provided with a drive shaft 112. The bottom of the drive shaft 112 is provided with a target plate 113. Secondly, the lower end of the drive shaft 112 is fixed to the center of the target plate 113, and the upper end extends upward through the flow channel. The external bellows 110 is fitted to achieve dynamic sealing, blocking the upward leakage of high viscosity oil. A sealing gasket 109 is installed between the bellows seat 111 and the bottom shell 101 to further enhance the static sealing effect and eliminate the risk of leakage.

[0019] A sensor mounting base 102 is provided inside the bottom shell 101, and a cover 105 is provided on the top of the bottom shell 101. The cover 105 is fastened to the top of the bottom shell 101 to form a closed protective cavity to protect the internal sensor and transmission components. A tension / compression sensor 103 is fixedly connected to the sensor mounting base 102. The tension / compression sensor 103 is installed horizontally or vertically on it. The top end of the transmission shaft 112 is movably connected to the sensor detection end through a pin 104, i.e., in contact connection.

[0020] The fixed sleeve 108 has a through groove inside, and the size of the through groove is adapted to the size of the ejector pin 104. The ejector pin 104 is provided on one side of the tension / compression sensor 103. The elastic reset member 110 is provided on the outer surface of the drive shaft 112. The fixed support 100 has a sealed cavity inside.

[0021] In this embodiment, a tightening screw 106 is threadedly connected to the top of the fixed sleeve 108, and an end cap 107 is provided on the top of the drive shaft 112. The top of the end cap 107 is convex, and a groove adapted to the top of the end cap 107 is provided on the side of the tightening screw 106 near the end cap 107. The tightening screw 106 and the end cap 107 cooperate to adjust the preload of the ejector pin, eliminate assembly gaps, and reduce force transmission loss.

[0022] Furthermore, a temperature sensor 115 is installed inside the drive shaft 112. The temperature sensor 115 is inserted laterally into the flange pipe assembly 114, with the probe positioned at the center of the flow channel to collect the medium temperature in real time.

[0023] In this embodiment, the target plate 113 has a symmetrical streamlined structure. The target plate 113 is vertically disposed inside the flange pipe assembly 114, perpendicular to the fluid flow direction. The surface curvature of the target plate 113 is adapted to the flow direction of high viscosity oil. When the fluid impacts the target plate 113, the drive shaft 112 undergoes axial displacement, driving the ejector pin 104 to move, thereby transmitting the fluid force on the target plate 113 to the tension-compression sensor 103. The tension-compression sensor 103 converts the force signal into an electrical signal output to realize the measurement of flow rate.

[0024] During installation, the flow meter can be installed horizontally or vertically on the pipeline, ensuring that the plane of the target plate 113 is completely perpendicular to the fluid flow direction to avoid lateral force interference. During the commissioning stage, the sensor zero point is adjusted by tightening the screw 106, and the compensation coefficient is calibrated by connecting the temperature signal, after which it can be put into use.

[0025] Employing a bellows 110 dynamic seal combined with a double-layer static seal structure, it boasts excellent sealing performance, completely resolving leakage issues in high-viscosity oil media. Suitable for long-term continuous operation, it offers a longer service life. Its short and rigid force transmission path, coupled with the 106 adjusting screw, eliminates assembly gaps, significantly reducing force transmission loss and improving measurement sensitivity and linearity, enabling accurate detection even at low flow rates. An integrated temperature sensor 115 provides real-time viscosity compensation, effectively eliminating measurement errors caused by the viscosity-temperature characteristics of high-viscosity oils, ensuring stable metering accuracy across the entire temperature range. The compact structure, free of easily clogged components, minimizes pipeline pressure loss, facilitates easy installation and commissioning, requires no complex maintenance, and is suitable for various high-viscosity oil industrial metering scenarios, demonstrating strong versatility.

[0026] The working principle of the above embodiments is as follows: When the high-viscosity oil medium flows stably along the flange pipe assembly 114, the dynamic pressure of the fluid itself and the viscous resistance caused by the high viscosity will act together on the surface of the target plate 113, forming an axial force that is directly related to the fluid velocity and the viscosity of the medium. The magnitude of this force changes synchronously with the flow rate, and the force returns to zero when there is no flow. After the target plate 113 is subjected to force, the force is transmitted upward through the rigidly connected transmission shaft 112 and then transmitted losslessly through the ejector pin 104 to the tension and compression sensor 103. The sensor converts the mechanical force into a standard electrical signal output. At the same time, the temperature sensor 115 collects the medium temperature of the high viscosity oil in real time. Since the viscosity of high viscosity oil changes significantly with temperature fluctuations, it will directly affect the measurement accuracy. Therefore, the temperature signal is synchronously transmitted to the external processing unit. Combined with the viscosity-temperature characteristics of the oil, the force signal is corrected for viscosity compensation in real time. The processing unit converts the compensated electrical signal into the corresponding volumetric flow rate or mass flow rate value according to the calibration coefficient, and finally realizes the accurate and stable measurement of the high viscosity oil flow rate.

[0027] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A target-type flow meter for high-viscosity oil flow rate, characterized in that: The device includes a fixed support (100), a flange pipe assembly (114) at the bottom of the fixed support (100), a bottom shell (101) at the top of the fixed support (100), a fixed sleeve (108) and a sealing gasket (109) inside the fixed support (100), an elastic reset member (110) at the lower end of the fixed sleeve (108), an elastic reset member seat (111) at the bottom of the elastic reset member (110), a drive shaft (112) inside the fixed sleeve (108), a target plate (113) at the bottom of the drive shaft (112), a sensor mounting base (102) inside the bottom shell (101), a cover shell (105) at the top of the bottom shell (101), a tension / compression sensor (103) fixedly connected to the sensor mounting base (102), and a pin (104) on one side of the tension / compression sensor (103).

2. The target flow meter for high viscosity oil flow rate according to claim 1, characterized in that: The top of the fixed sleeve (108) is threaded with a tightening screw (106), and the top of the drive shaft (112) is provided with an end cap (107). The top of the end cap (107) is convex, and the side of the tightening screw (106) near the end cap (107) is provided with a groove that matches the top of the end cap (107).

3. The target flow meter for high viscosity oil flow rate according to claim 1, characterized in that: A temperature sensor (115) is installed inside the drive shaft (112).

4. The target flow meter for high viscosity oil flow rate according to claim 1, characterized in that: The fixed sleeve (108) has a through groove inside, and the size of the through groove is adapted to the size of the ejector pin (104), and the end of the ejector pin (104) is movably connected to the drive shaft (112).

5. The target flow meter for high viscosity oil flow rate according to claim 1, characterized in that: The elastic reset member (110) is disposed on the outer surface of the transmission shaft (112), and the fixed support (100) has a sealed cavity inside.

6. The target flow meter for high viscosity oil flow rate according to claim 1, characterized in that: The target plate (113) has a symmetrical streamlined structure, and the surface curvature of the target plate (113) is adapted to the flow direction of high viscosity oil.

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