A device for natural gas flow metering correction

Abstract

The utility model relates to natural gas flow monitoring technical field, concretely relates to a device for natural gas flow measurement correction, including connecting pipe, sleeve, sensor and correction appearance. The one end of connecting pipe is used for with the measurement interface on the aeration casing passes through the thread connection. The both ends of sleeve are equipped with first internal thread and second internal thread respectively, the rotation direction of first internal thread and second internal thread is opposite. The both ends of sleeve are connected with the other end of connecting pipe and sensor through first internal thread and second internal thread respectively. The sensor is connected with correction appearance through data line. Through the sleeve both ends set up the first internal thread and the second internal thread of rotation direction opposite, can realize rotating sleeve just can complete its with connecting pipe and sensor connection, avoids the data line torsion simultaneously, reduces the risk that the data line and sensor junction breaks or is damaged.

Description

Technical Field

[0001] This utility model relates to the field of natural gas flow monitoring technology, and in particular to a device for natural gas flow metering correction. Background Technology

[0002] In natural gas pipeline systems, flow meters are used to measure the flow rate of natural gas and are important tools for metering, trade settlement, and production control. However, since various factors can cause deviations in flow measurement, a calibrator (or flow calibration device, standard meter method calibration system) is required to ensure the accuracy of the flow meter.

[0003] Under normal circumstances, the sensor equipped with the calibrator is directly connected to the measurement interface on the natural gas pipeline, and the two are tightly connected by a threaded structure. At the same time, the sensor establishes a data transmission channel with the calibrator via a data cable.

[0004] When operators need to install or remove the sensor, they must rotate the sensor to install it onto the measurement interface or remove it from the measurement interface. During the rotation of the sensor, the data cable will rotate along with the sensor.

[0005] To reduce the risk of external interference during data transmission and improve data transmission accuracy, a relatively stiff and thick data cable is used. However, because the other end of the data cable connects to the calibrator, it cannot be easily disassembled and must be handled by professional personnel. Therefore, this data cable is usually not disconnected. Consequently, when the sensor rotates, causing the data cable to rotate, this part of the cable cannot rotate as flexibly as the end closer to the sensor. Therefore, during sensor installation or removal, the connection point between the data cable and the sensor is prone to breakage or damage. Utility Model Content

[0006] The purpose of this invention is to overcome the problem in the prior art that when the sensor is installed on the measurement interface of the natural gas pipeline or removed from the measurement interface, the data cable connection point between the sensor and the calibrator is easily broken or damaged, so as to provide a device for natural gas flow metering calibration.

[0007] This utility model provides a device for natural gas flow metering calibration, comprising: A connecting pipe, one end of which is used for threaded connection to a measuring interface on the vent housing; A sleeve, wherein the two ends of the sleeve are respectively provided with a first internal thread and a second internal thread, and the first internal thread and the second internal thread have opposite directions of rotation; The sensor is provided, with both ends of the sleeve connected to the other end of the connecting pipe and the sensor via the first internal thread and the second internal thread, respectively. The sensor is connected to the calibrator via a data cable.

[0008] The vent housing is the main body of the natural gas flow metering device, and its two ends are connected to the main natural gas pipeline via flanges. A flow meter base is installed on the vent housing.

[0009] The sensor is used to detect specific parameters of the natural gas flowing through the ventilation housing and feeds them back to the calibration instrument via the data line.

[0010] This invention provides a device for natural gas flow metering calibration. The connecting pipe connects the sleeve to the measuring interface. The sleeve, in turn, connects the connecting pipe to the sensor. The sleeve has a first internal thread and a second internal thread at each end, with opposite directions of rotation. This opposite-direction design allows for connection between the sleeve and the connecting pipe and sensor simultaneously without rotating either component; simply rotating the sleeve completes the connection. Since the sensor remains stationary and does not rotate, the data cable connected to the sensor will not twist, thus reducing the risk of breakage or damage at the connection point.

[0011] The outer wall of the sleeve can be textured or sandblasted to increase friction and facilitate manual rotation. Alternatively, the outer wall of the sleeve can be designed as a polygon to allow for rotation using tools such as wrenches.

[0012] The connecting pipe and the sleeve can be made of plastic or stainless steel.

[0013] Preferably, a nut is fitted in the middle of the connecting pipe, and the nut is welded to the connecting pipe. The nut facilitates the connection of the connecting pipe to the measuring interface using tools such as a wrench, increasing operational convenience.

[0014] Preferably, the outer contour of the sleeve's cross-section is a regular polygon, such as a square, pentagon, hexagon, or octagon. This design facilitates rotation of the sleeve using tools such as wrenches.

[0015] Preferably, the outer contour of the sleeve cross-section is a regular hexagon.

[0016] Preferably, the sleeve has an internal rubber gasket located between the first internal thread and the second internal thread. During connection, the connecting tube and the sensor compress the rubber gasket from both sides, thereby enhancing the sealing of the sleeve connection, reducing the possibility of air leakage at the connection point, and ensuring the measurement accuracy of the sensor.

[0017] Preferably, the length of the threaded ends at both ends of the connecting pipe is 10mm-16mm.

[0018] Preferably, the length of the sleeve is 20mm-32mm, and the inner diameter of the sleeve is 12mm-16mm.

[0019] Preferably, both the connecting pipe and the sleeve are made of stainless steel. Compared to plastic, stainless steel exhibits superior strength and mechanical properties, and possesses excellent resistance to acid corrosion. The tensile strength, yield strength, and hardness of stainless steel are significantly higher than those of ordinary plastics, enabling it to withstand greater pressure, impact, and vibration loads. A dense oxide film (such as Cr2O3) can form on the surface of stainless steel, which performs exceptionally well in acidic environments (such as solutions with pH < 6), preventing material degradation or structural damage, whereas most plastics are prone to swelling or corrosion in strong acids.

[0020] Preferably, the calibrator is connected to the fixed column of the vent housing via a bracket.

[0021] The connection between the bracket and the fixed column can be welding or bolting.

[0022] Preferably, the bracket is connected to the fixed column by U-bolts. This connection method not only provides stability but also facilitates disassembly.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a device for natural gas flow metering calibration. By setting a first internal thread and a second internal thread with opposite directions at both ends of the sleeve, the connection between the sleeve and the connecting pipe and the sensor can be completed by rotating the sleeve, while avoiding the twisting of the data line and reducing the risk of breakage or damage at the connection between the data line and the sensor. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a natural gas flow metering device.

[0025] Figure 2 This is a schematic diagram of the connector.

[0026] Figure 3 This is a schematic diagram of the sleeve.

[0027] Figure 4 for Figure 3 Cross-sectional view of section line AA in the middle.

[0028] Figure 5 This is a schematic diagram of the sensor.

[0029] Figure 6 This is a top view of the support and calibration instrument.

[0030] Marked in the image: 1-Ventilation shell, 101-Measurement Interface 2-Connecting pipe, 3-Sleeve, 4-Sensors 5. Data cable 6-Calibrator 7-Staff, 701-U bolt, 8-Flowmeter base gauge, 801-Fixed Column. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0032] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0034] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0035] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0036] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0037] Example 1 like Figures 1 to 6 As shown, a device for natural gas flow metering calibration includes a connecting pipe 2, a sleeve 3, a sensor 4, and a calibrator 6.

[0038] One end of the connecting pipe 2 is threadedly connected to the measuring interface 101 on the vent housing 1. Specifically, the measuring interface 101 communicates with the interior of the vent housing 1, and the measuring interface 101 has an internal thread. The end of the connecting pipe 2 connected to the measuring interface 101 has a corresponding external thread. A flow meter base gauge 8 is connected to the vent housing 1 via a fixing post 801. The flow meter base gauge 8 is used to measure the flow rate of natural gas in the vent housing 1.

[0039] The sleeve 3 has a first internal thread and a second internal thread at both ends, as shown below. Figure 4 As shown. The first internal thread and the second internal thread have opposite directions of rotation. The lengths of the first internal thread and the second internal thread can be the same.

[0040] The two ends of the sleeve 3 are connected to the other end of the connecting pipe 2 and the sensor 4 respectively through the first internal thread and the second internal thread. Specifically, the other end of the connecting pipe 2 and the sensor 4 are both provided with external threads corresponding to the first internal thread and the second internal thread.

[0041] Sensor 4 is connected to calibrator 6 via data cable 5. Specifically, sensor 4 may have a hexagonal prism structure, which is coaxially arranged with sensor 4 to facilitate fixing sensor 4 with tools such as wrenches during connection. The inner diameter of the vent hole at the center of sensor 4 can be 4mm-5mm, specifically 4mm, 4.15mm, 4.5mm, 4.8mm, or 5mm.

[0042] In an optional embodiment, a nut may be fitted in the middle of the connecting pipe 2, the nut being welded to the connecting pipe 2 and arranged coaxially. Specifically, the nut is 14mm long and has a hexagonal cross-section with a side length of 13.2mm. The inner diameter of the vent hole penetrating the center of the connecting pipe 2 can be 4mm-5mm, specifically 4mm, 4.15mm, 4.5mm, 4.8mm, or 5mm.

[0043] In an optional embodiment, the outer contour of the sleeve 3 cross-section can be a regular polygon.

[0044] In an optional embodiment, the outer contour of the sleeve 3 cross-section can be a regular hexagon. Specifically, the side length of the regular hexagon can be 12mm-14mm, and the specific side length can be 12mm, 12.4mm, 13mm, 13.2mm, 13.6mm, or 14mm.

[0045] In an optional embodiment, a rubber washer may be provided inside the sleeve 3, the rubber washer being located between the first internal thread and the second internal thread. The outer diameter of the rubber washer is the same as the inner diameter of the sleeve 3, and the inner diameter of the rubber washer may be 4mm-6mm. The thickness of the rubber washer may be 2mm-4mm.

[0046] In an optional embodiment, the length of the threaded ends at both ends of the connecting pipe 2 can be 10mm-16mm, specifically 10mm, 10.8mm, 11.8mm, 12mm, 12.8mm, 13mm, 14mm, 15mm, or 16mm.

[0047] In an optional embodiment, the length of the sleeve 3 can be 20mm-32mm, specifically 20mm, 24mm, 24.5mm, 28mm, 30mm, or 32mm. The inner diameter of the sleeve 3 can be 12mm-16mm, specifically 12mm, 12.4mm, 13mm, 13.2mm, 13.6mm, 14mm, 15mm, or 16mm.

[0048] In an optional embodiment, both the connecting pipe 2 and the sleeve 3 can be made of stainless steel. Specifically, the stainless steel material can be 316 stainless steel, 304 stainless steel, or 2205 stainless steel.

[0049] In an optional embodiment, the calibrator 6 can be connected to the fixed column 801 of the vent housing 1 via the bracket 7.

[0050] In an optional embodiment, the bracket 7 can be connected to the fixing post 801 via U-bolts. For example... Figure 5 As shown, the U-bolt is used to wrap around the fixed column 801, and the two ends of the U-bolt are connected to the bracket 7 by nuts.

[0051] In an optional embodiment, the threaded end of the connecting tube 2 and the connecting sleeve 3 has the same threaded end length as the sensor 4. Therefore, after the sleeve 3 is rotated, it can be tightly connected to both the connecting tube 2 and the sensor 4 simultaneously.

[0052] Example 2 This embodiment describes the installation method of the device for natural gas flow metering and calibration as described in Embodiment 1, including the following steps: S1: First, make a preliminary connection between the connecting tube 2 and the measuring interface 101. Then, use a wrench to hold the nut on the connecting tube 2, and then turn the wrench to complete the connection between the connecting tube 2 and the measuring interface 101. Specifically, the connecting tube 2 can be wrapped with Teflon tape around the screw head first, and then tightened to fix it.

[0053] S2: Initially align both ends of the sleeve 3 with the connecting pipe 2 and the sensor 4, respectively. Use the first wrench to hold the sensor 4 in place to prevent rotation; then use the second wrench to hold the sleeve 3 in place, and then rotate the second wrench so that the first internal thread inside the sleeve 3 engages with the external thread of the connecting pipe 2, while the second internal thread inside the sleeve 3 engages with the corresponding external thread of the sensor 4. This achieves the connection between the sensor 4 and the measurement interface 101.

[0054] Using the device described in this application can reduce the probability of damage to the connection between the sensor 4 and the data cable 5. Given that the purchase price of a single sensor 4 equipped with the data cable 5 is as high as 10,000 yuan, using this device can significantly save equipment costs. Furthermore, the device allows for independent installation and disassembly by a single person, thereby further saving labor costs.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for natural gas flow metering correction, characterized in that, include: A connecting pipe (2), one end of which is used to connect to the measuring interface (101) on the vent housing (1) by means of a thread; Sleeve (3), the two ends of the sleeve (3) are respectively provided with a first internal thread and a second internal thread, the first internal thread and the second internal thread have opposite directions of rotation; The two ends of the sleeve (3) are connected to the other end of the connecting pipe (2) and the sensor (4) respectively through the first internal thread and the second internal thread; The calibrator (6) is connected to the sensor (4) via a data cable (5).

2. The device for natural gas flow metering correction according to claim 1, characterized in that, A nut is fitted in the middle of the connecting pipe (2), and the nut is welded to the connecting pipe (2).

3. The device for natural gas flow metering correction according to claim 1, characterized in that, The outer contour of the cross-section of the sleeve (3) is a regular polygon.

4. The device for natural gas flow metering correction according to claim 3, characterized in that, The outer contour of the cross-section of the sleeve (3) is a regular hexagon.

5. A device for natural gas flow metering correction according to any one of claims 1-4, characterized in that, The sleeve (3) is provided with a rubber washer inside, which is located between the first internal thread and the second internal thread.

6. The device for natural gas flow metering correction according to claim 5, characterized in that, The length of the threaded ends at both ends of the connecting pipe (2) is 10mm-16mm.

7. The device for natural gas flow metering correction according to claim 5, characterized in that, The length of the sleeve (3) is 20mm-32mm, and the inner diameter of the sleeve (3) is 12mm-16mm.

8. The device for natural gas flow metering correction according to claim 5, characterized in that, Both the connecting pipe (2) and the sleeve (3) are made of stainless steel.

9. The device for natural gas flow metering correction according to claim 5, characterized in that, The calibrator (6) is connected to the fixed column (801) of the ventilated housing (1) via a bracket (7).

10. The device for natural gas flow metering correction according to claim 9, characterized in that, The bracket (7) is connected to the fixed column (801) by U-bolts.

Images