Device and method for quickly checking pressure transmitter on line

Abstract

The invention belongs to the technical field of natural gas exploitation, and particularly relates to a device and a method for on-line rapid calibration of a pressure transmitter, the device comprises an experiment table, the experiment table is provided with a power supply module, a calibration instrument, a manual fine adjustment device, an oil cup and an electric pressurizing pump, and a pipeline is connected between the electric pressurizing pump and the manual fine adjustment device. A check valve and a second stop valve are mounted on the pipeline, the oil cup is communicated with the electric pressurizing pump, the electric pressurizing pump is connected with a connecting pipeline, a first stop valve is mounted on the connecting pipeline, the other end of the connecting pipeline is connected with a two-valve group, and the two-valve group is respectively connected with a pressure transmitter main body and a process pipeline. According to the invention, the original power supply and the process connecting pipeline of the pressure transmitter can be utilized to combine the detection calibrator with the experiment table, so that the pressure transmitter can be quickly calibrated without being disassembled.

Description

Technical Field

[0001] The present invention belongs to the technical field of natural gas extraction, and particularly relates to an on-line rapid calibration pressure transmitter device and method. Background Technique

[0002] The natural gas extraction and treatment unit mainly includes a gas well wellhead gas production tree, a wellhead treatment process, a desulfurization unit, a dehydration unit, a deep dehydration treatment device, and a metering and external transportation unit, which use a large number of pressure transmitters to detect production data, analyze production conditions, and measure production capacity. After being used for a period of time, the pressure transmitters need to be calibrated. Generally, the inspection period is specified as 12 months. Therefore, a large amount of time needs to be invested to complete disassembly, transportation, and installation. Due to the limitations of the installation location and operating space of some pressure transmitters, disassembly and installation are inconvenient. Based on reducing labor intensity and improving calibration efficiency, this invention is made.

[0003] The calibration of a pressure transmitter refers to detecting the pressure transmitter using a certain standard instrument under the premise of the corresponding relationship between input and output. When the pressure transmitter is produced, its technical performance needs to be calibrated to ensure the accurate transmission of the measured value. After the pressure transmitter is used, stored, or repaired, its technical performance needs to be calibrated again to ensure the normal use of the pressure transmitter.

[0004] However, the existing pressure transmitters still have the following problems in use:

[0005] 1. Complicated disassembly: Before disassembly, the power supply of the pressure transmitter needs to be cut off, the back cover of the pressure transmitter needs to be opened, the power cord of the pressure transmitter needs to be disassembled, the metal coiled pipe needs to be disassembled to take out the power cord, the control valve of the pressure transmitter needs to be closed, the process interface pipeline needs to be depressurized, and then the pressure transmitter can be disassembled; transportation of the pressure transmitter: the pressure transmitter needs to be numbered to avoid mixed loading, and the back cover of the pressure transmitter needs to be covered; calibration of the pressure transmitter: the pressure transmitter is installed on the test bench, the back cover of the pressure transmitter is opened, an independent power supply is connected, and the calibration is carried out according to the calibration procedure; installation of the pressure transmitter: repeat the disassembly process to restore the pressure transmitter.

[0006] 2. Complicated wiring: After each execution unit is assembled, the detection facilities need to be powered on. The traditional wiring method generally fixes the wire on the wiring terminal of the transmitter with a screwdriver. On the one hand, the operation is relatively complicated and slow, and on the other hand, the sealing performance is poor and it is easy to infiltrate water vapor. Summary of the Invention

[0007] The purpose of the present invention is to provide an on-line rapid calibration pressure transmitter device and method, which can utilize the original power supply and process connection pipeline of the pressure transmitter, combine the detection calibrator with the test bench, and realize the rapid calibration of the pressure transmitter without disassembly.

[0008] The technical solutions adopted by the present invention are specifically as follows:

[0009] An on-line rapid calibration pressure transmitter device and method, including an experimental bench, on which a power supply module, a calibrator, a manual fine-tuning device, an oil cup, and an electric pressure pump are installed. A pipeline is connected between the electric pressure pump and the manual fine-tuning device, and a check valve and a second stop valve are installed on the pipeline. The oil cup is communicated with the electric pressure pump. A connecting pipeline is connected to the electric pressure pump, and a first stop valve is installed on the connecting pipeline. The other end of the connecting pipeline is connected to a two-valve group, and a pressure transmitter main body and a process pipeline are respectively connected to the two-valve group;

[0010] A negative connecting wire and a positive connecting wire are connected to the terminals of the calibrator. A transmitter rear cover is assembled on the side wall of the pressure transmitter main body, and a quick conduction component is arranged on the transmitter rear cover.

[0011] The positive and negative poles of the power supply module are connected with a positive pressure pump power supply wire and a negative pressure pump power supply wire, and the other ends of the positive pressure pump power supply wire and the negative pressure pump power supply wire are connected to the electric pressure pump.

[0012] The quick conduction component includes a conductive sheet and a seal. The conductive sheet is assembled on the wiring terminal of the pressure transmitter main body. The other end of the conductive sheet is fixedly connected with a connecting cylinder, and an electrode sheet is fixedly connected to the inner wall of the connecting cylinder. The other ends of the negative connecting wire and the positive connecting wire are both fixedly connected with a transfer pipe. A thimble is arranged in the transfer pipe, and the thimbles are connected with the negative connecting wire and the positive connecting wire. The thimble and the electrode sheet are mutually matched, and a screw sleeve is threadedly connected to the side wall of the transfer pipe.

[0013] A sealing plate is fixedly connected to the side wall of the transfer pipe. The sealing plate is annular, and the cross section of the sealing plate is L-shaped. A sealing groove is opened on the side wall of the transmitter rear cover, and the sealing plate and the sealing groove are mutually matched. The sealing plate is hollow, and a fixing component is arranged in the sealing plate.

[0014] The fixing component includes a thimble movably connected to the side wall of the sealing plate. One end of the thimble is movably connected with the screw sleeve, and the other end of the thimble penetrates through the sealing plate and is fixedly connected with a trapezoidal block. A plurality of insertion rods are uniformly arranged in the inner cavity of the sealing plate. One end of the insertion rod is slidably connected with the trapezoidal block, and the other end of the insertion rod penetrates through the sealing plate and is movably connected with it. A slot is opened on the side wall of the sealing groove. The slot is annular, and the insertion rod is adapted to the slot.

[0015] The cross section of the thimble is T-shaped, and a T-shaped groove is opened on the end face of the screw sleeve. The T-shaped groove is annular, and the thimble extends into the T-shaped groove.

[0016] The seal includes a sealing plug, and the sealing plug is adapted to the connecting cylinder. A pull rod is fixedly connected to the end face of the sealing plug.

[0017] The number of the electrode plates is at least four. One end of the electrode plate close to the conductive sheet is suspended, and the electrode plate is made of an elastic conductive material.

[0018] A method for using an on-line rapid calibration pressure transmitter device, the method comprising the following steps:

[0019] S1: Close the first stop valve of the pressure transmitter main pipeline, open the relief valve of the two-valve group. When the pressure at the process interface of the pressure transmitter main body is released to zero, slowly open the first stop valve to purge the process pipeline to complete the pipeline;

[0020] S2: Connect the positive and negative connection wires on the calibrator to the terminals of the pressure transmitter main body through the quick conduction component, turn on the calibrator, adjust the working mode of the calibrator to the calibration mode, and turn on the standard precision digital meter;

[0021] S3: Confirm that the third stop valve is in the closed state, the first stop valve and the second stop valve are in the open state, start the electric pressure pump. When the pressure reaches the target value range, stop the electric pressure pump, close the second stop valve, adjust the manual fine-tuning device to make the pressure stable at the target value, record the value. After the measurement is completed, open the third stop valve to release the pressure to complete the calibration.

[0022] The technical effects achieved by the present invention are:

[0023] An on-line rapid calibration pressure transmitter device and method of the present invention can realize on-line rapid calibration of the pressure transmitter, avoid disassembly, transportation and installation of the pressure transmitter, improve the inspection efficiency by 75%, save 5% of the cost, greatly reduce the labor intensity and save the operation time.

[0024] An on-line rapid calibration pressure transmitter device and method of the present invention can facilitate the quick conduction connection between the calibrator and the pressure transmitter through the mutual cooperation between the transmitter rear cover, the connecting cylinder, the thimble and the quick conduction component, etc., effectively solve the cumbersome problem of the traditional need to unscrew the transmitter rear cover and then connect the wiring terminals, effectively improve the wiring efficiency and reduce the on-site assembly time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flow schematic diagram of an embodiment of the present invention;

[0026] Figure 2 is a structural schematic diagram of a prior art two-valve group;

[0027] Figure 3 is a perspective view of a pressure transmitter according to an embodiment of the present invention;

[0028] Figure 4 is a perspective view of a transmitter rear cover according to an embodiment of the present invention;

[0029] Figure 5 It is a schematic structural diagram of the fast-conducting component in the embodiment of the present invention;

[0030] Figure 6 It is a schematic structural diagram of the sealing plug in the embodiment of the present invention;

[0031] Figure 7 is an embodiment of the present invention Figure 5 The enlarged view at position A in.

[0032] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0033] 1. Pressure transmitter main body; 2. Two-valve group; 3. Process pipeline; 4. Calibrator; 5. Standard precision digital meter; 6. Manual fine-tuning device; 7. Power supply module; 8. Oil cup; 9. Electric pressure pump; 10. Check valve; 11. First stop valve; 12. Negative connection wire; 13. Positive connection wire; 14. Positive pressure pump power supply wire; 15. Negative pressure pump power supply wire; 16. Test bench; 17. Connecting pipeline; 18. Second stop valve; 19. Third stop valve; 20. Transmitter rear cover; 21. Conductive sheet; 22. Connecting cylinder; 23. Electrode sheet; 24. Adapter pipe; 25. Thimble; 26. Sealing plate; 27. Sealing groove; 28. Nut sleeve; 29. Thumb rod; 30. Trapezoidal block; 31. Plug rod; 32. Plug slot; 33. T-shaped groove; 34. Sealing plug. Specific embodiments

[0034] In order to make the purpose and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present invention, and does not strictly limit the scope of protection specifically claimed by the present invention.

[0035] Embodiment 1:

[0036] As Figures 1-7 shown, an on-line fast calibration pressure transmitter device and method include a test bench 16, on which a power supply module 7, a calibrator 4, a manual fine-tuning device 6, an oil cup 8, and an electric pressure pump 9 are installed. A pipeline is connected between the electric pressure pump 9 and the manual fine-tuning device 6, and a check valve 10 and a second stop valve 18 are installed on the pipeline. The oil cup 8 is communicated with the electric pressure pump 9. A connecting pipeline 17 is connected to the electric pressure pump 9, a first stop valve 11 is installed on the connecting pipeline 17, and the other end of the connecting pipeline 17 is connected to a two-valve group 2, and a pressure transmitter main body 1 and a process pipeline 3 are respectively connected to the two-valve group 2;

[0037] Among them, the calibrator 4 uses a Fluke 744 calibrator 4, which is mainly an instrument for testing and diagnosing electronic circuits in various fields. It can be used to test and calibrate digital and analog signals, including measurements such as temperature, voltage, current, frequency, pulse, rotational speed, capacitance, and resistance; it features high precision and high sensitivity. This instrument provides a liquid crystal display and various connection options, such as USB and GPIB interfaces, and can be conveniently connected to a computer to achieve data recording and report generation. It also has multiple functions, such as peak recording, relative measurement, extreme value tracking, etc., which can meet various requirements of engineers or technicians in testing and maintaining electronic devices.

[0038] A negative connection wire 12 and a positive connection wire 13 are connected to the terminals of the calibrator 4. A transmitter rear cover 20 is assembled on the side wall of the pressure transmitter body 1, and the transmitter rear cover 20 is provided with a quick conduction component.

[0039] Among them, the two-valve group 2 is a prior art and will not be elaborated in detail in this solution.

[0040] The positive and negative poles of the power supply module 7 are connected with a positive pressure pump power supply wire 14 and a negative pressure pump power supply wire 15, and the other ends of the positive pressure pump power supply wire 14 and the negative pressure pump power supply wire 15 are connected to the electric pressure pump 9.

[0041] Embodiment 2:

[0042] Based on Embodiment 1, this embodiment specifically discloses the quick connection between the negative connection wire 12 and the positive connection wire 13 on the terminals of the calibrator 4 and the pressure transmitter 1:

[0043] As Figure 5 shown, the quick conduction component includes a conductive sheet 21 and a seal. The conductive sheet 21 is assembled on the wiring terminal of the pressure transmitter body 1. The other end of the conductive sheet 21 is fixedly connected with a connecting cylinder 22. An electrode sheet 23 is fixedly connected to the inner wall of the connecting cylinder 22. The other ends of the negative connection wire 12 and the positive connection wire 13 are both fixedly connected with a transfer pipe 24. A thimble 25 is arranged in the transfer pipe 24. The thimbles 25 are both connected to the negative connection wire 12 and the positive connection wire 13. The thimbles 25 are mutually matched with the electrode sheets 23. A screw sleeve 28 is threadedly connected to the side wall of the transfer pipe 24.

[0044] As Figure 5 shown, a sealing plate 26 is fixedly connected to the side wall of the transfer pipe 24. The sealing plate 26 is annular, and the cross-section of the sealing plate 26 is L-shaped. A sealing groove 27 is opened on the side wall of the transmitter rear cover 20. The sealing plate 26 is mutually matched with the sealing groove 27. The sealing plate 26 is hollow, and a fixing component is arranged in the sealing plate 26.

[0045] When the ejector pin 25 is inserted into the connecting tube 22 , the sealing plate 26 enters the sealing groove 27 , which can prevent external dust or moisture from entering the pressure transmitter body 1 , thereby achieving a sealing protection effect.

[0046] like Figure 7 As shown, the fixing assembly includes a push rod 29 movably connected to the side wall of the sealing plate 26, one end of the push rod 29 is movably connected to the screw sleeve 28, the other end of the push rod 29 penetrates the sealing plate 26 and is fixedly connected to the trapezoidal block 30, a plurality of plug rods 31 are evenly arranged in the inner cavity of the sealing plate 26, one end of the plug rod 31 is slidably connected to the trapezoidal block 30, the other end of the plug rod 31 penetrates the sealing plate 26 and is movably connected thereto, a slot 32 is opened on the side wall of the sealing groove 27, the slot 32 is annular, and the plug rod 31 is adapted to the slot 32.

[0047] Specifically, when the negative electrode connection line 12 is connected to the positive electrode connection line 13, the ejector pin 25 is first inserted into the connecting tube 22, and the electrode sheet 23 is stretched open at the same time, and the elasticity of the electrode sheet 23 is used to keep in contact with the ejector pin 25 at all times. When the ejector pin 25 is inserted into place, the sealing plate 26 is located in the sealing groove 27. At this time, the rotating screw sleeve 28 pushes the ejector pin 29 to move, and the ejector pin 29 drives the trapezoidal block 30 to move. The inclined surface of the trapezoidal block 30 is used to push the insertion rod 31 outward, so that the other end of the insertion rod 31 is inserted into the slot 32, which is used to fix the ejector pin 25 to prevent it from falling off during use.

[0048] like Figure 7 As shown, the cross section of the push rod 29 is T-shaped, and the end surface of the screw sleeve 28 is provided with a T-shaped groove 33, which is annular, and the push rod 29 extends into the T-shaped groove 33. When the screw sleeve 28 is rotated, the displacement of the screw sleeve 28 can support the movement of the push rod 29, and the screw sleeve 28 will not reverse without the action of external force, which effectively improves its stability.

[0049] Embodiment 3:

[0050] Based on Example 2, this embodiment further seals the connecting tube 22 when it is not in use, and its specific structure is as follows:

[0051] like Figure 6 As shown, the seal includes a sealing plug 34, which is matched with the connecting tube 22, and a pull rod is fixedly connected to the end surface of the sealing plug 34. The sealing plug 34 is made of rubber or silicone material, and after being connected to the connecting tube 22, it has a strong friction force and will not fall off easily, thereby effectively playing a sealing role.

[0052] like Figure 5 As shown, the number of electrode sheets 23 is at least four, one end of the electrode sheet 23 close to the conductive sheet 21 is suspended, and the electrode sheet 23 is made of elastic conductive material.

[0053] Specifically, the electrode sheet 23 is made of any one of copper, aluminum, and silver;

[0054] Copper is a common conductive metal. Besides having good electrical conductivity, it also has a certain elasticity. Therefore, copper is often used to manufacture elastic conductive wires, spring contactors, and elastic contacts, etc.;

[0055] Aluminum is also a common conductive metal. Like copper, it has good electrical conductivity and a certain elasticity. Aluminum can be used to manufacture elastic wires, spring sheets, and elastic contactors, etc.;

[0056] Silver is a very excellent conductive metal and has a certain elasticity when its purity is relatively high. Silver wires are widely used in electrical connections and conductive wires.

[0057] Embodiment 4:

[0058] A usage method of an on-line fast-checking pressure transmitter device, the usage method includes the following steps:

[0059] S1: Close the first stop valve 11 of the pipeline of the pressure transmitter main body 1, open the bleed valve of the two-valve group 2. When the pressure at the process interface of the pressure transmitter main body 1 is released to zero, slowly open the first stop valve 11 to purge the process pipeline and complete the pipeline;

[0060] S2: Connect the positive connection wire 13 and the negative connection wire 12 on the calibrator 4 to the terminals of the pressure transmitter main body 1 through the fast conduction assembly, turn on the calibrator 4, adjust the working mode of the calibrator 4 to the calibration mode, and turn on the standard precision digital meter 5;

[0061] S3: Confirm that the third stop valve 19 is in the closed state, the first stop valve 11 and the second stop valve 18 are in the open state, start the electric pressure pump 9. When the pressure reaches the target value range, stop the electric pressure pump 9, close the second stop valve 18, adjust the manual fine-tuning device 6 to make the pressure stable at the target value, record the value. After the measurement is completed, open the third stop valve 19 to relieve the pressure and complete the calibration.

[0062] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, if not specifically stated and limited, are implemented according to the conventional means in this field.

Claims

1. An on-line rapid calibration pressure transmitter device, characterized in that: It includes a test bench (16), on which a power supply module (7), a calibrator (4), a manual fine-tuning device (6), an oil cup (8), and an electric pressure pump (9) are installed. A pipeline is connected between the electric pressure pump (9) and the manual fine-tuning device (6), and a check valve (10) and a second stop valve (18) are installed on the pipeline. The oil cup (8) is communicated with the electric pressure pump (9). A connecting pipeline (17) is connected to the electric pressure pump (9), a first stop valve (11) is installed on the connecting pipeline (17), and the other end of the connecting pipeline (17) is connected to a two-valve group (2). A pressure transmitter main body (1) and a process pipeline (3) are respectively connected to the two-valve group (2). A negative connecting wire (12) and a positive connecting wire (13) are connected to the terminals of the calibrator (4). A transmitter rear cover (20) is assembled on the side wall of the pressure transmitter main body (1), and a quick conduction assembly is arranged on the transmitter rear cover (20).

2. An on-line rapid calibration pressure transmitter device according to claim 1, characterized in that: A positive pressure pump power supply wire (14) and a negative pressure pump power supply wire (15) are connected to the positive and negative poles of the power supply module (7), and the other ends of the positive pressure pump power supply wire (14) and the negative pressure pump power supply wire (15) are connected to the electric pressure pump (9).

3. An on-line rapid calibration pressure transmitter device according to claim 1, characterized in that: The quick conduction assembly includes a conductive sheet (21) and a seal. The conductive sheet (21) is assembled on the wiring terminal of the pressure transmitter main body (1). The other end of the conductive sheet (21) is fixedly connected with a connecting cylinder (22). An electrode sheet (23) is fixedly connected to the inner wall of the connecting cylinder (22). The other ends of the negative connecting wire (12) and the positive connecting wire (13) are both fixedly connected with a swivel joint (24). A thimble (25) is arranged in the swivel joint (24). The thimbles (25) are both connected to the negative connecting wire (12) and the positive connecting wire (13). The thimble (25) and the electrode sheet (23) are mutually matched. A screw sleeve (28) is threadedly connected to the side wall of the swivel joint (24).

4. An on-line rapid calibration pressure transmitter device according to claim 2, characterized in that: A sealing plate (26) is fixedly connected to the side wall of the swivel joint (24). The sealing plate (26) is annular, and the cross-section of the sealing plate (26) is L-shaped. A sealing groove (27) is opened on the side wall of the transmitter rear cover (20). The sealing plate (26) and the sealing groove (27) are mutually matched. The sealing plate (26) is hollow, and a fixing component is arranged in the sealing plate (26).

5. An on-line rapid calibration pressure transmitter device according to claim 4, characterized in that: The fixing component includes a push rod (29) movably connected to the side wall of the sealing plate (26). One end of the push rod (29) is movably connected to the screw sleeve (28). The other end of the push rod (29) penetrates through the sealing plate (26) and is fixedly connected with a trapezoidal block (30). A plurality of insertion rods (31) are uniformly arranged in the inner cavity of the sealing plate (26). One end of the insertion rod (31) is slidably connected to the trapezoidal block (30). The other end of the insertion rod (31) penetrates through the sealing plate (26) and is movably connected to it. A slot (32) is opened on the side wall of the sealing groove (27). The slot (32) is annular, and the insertion rod (31) is adapted to the slot (32).

6. The on-line rapid calibration pressure transmitter device according to claim 5, characterized in that: The cross-section of the ejector rod (29) is T-shaped. A T-shaped groove (33) is formed in the end face of the screw sleeve (28). The T-shaped groove (33) is annular, and the ejector rod (29) extends into the T-shaped groove (33).

7. An on-line rapid calibration pressure transmitter device according to claim 3, characterized in that: The seal includes a seal plug (34). The seal plug (34) is adapted to the connecting cylinder (22), and a pull rod is fixedly connected to the end face of the seal plug (34).

8. An on-line rapid calibration pressure transmitter device according to claim 3, characterized in that: The number of the electrode plates (23) is at least four. One end of the electrode plate (23) close to the conductive sheet (21) is suspended, and the electrode plate (23) is made of an elastic conductive material.

9. A method for using an on-line rapid calibration pressure transmitter device, characterized in that: Using the on-line rapid calibration pressure transmitter device according to any one of claims 1-8, the usage method includes the following steps: S1: Close the first stop valve (11) of the pipeline of the pressure transmitter main body (1), open the relief valve of the two-valve group (2). When the pressure at the process interface of the pressure transmitter main body (1) is released to zero, slowly open the first stop valve (11) to purge the process pipeline and complete the pipeline; S2: Connect the positive connection wire (13) and the negative connection wire (12) on the calibrator (4) to the terminals of the pressure transmitter main body (1) through the quick conduction assembly. Open the calibrator (4), adjust the working mode of the calibrator (4) to the calibration mode, and open the standard precision digital meter (5); S3: Confirm that the third stop valve (19) is in the closed state, the first stop valve (11) and the second stop valve (18) are in the open state. Start the electric pressure pump (9). When the pressure reaches the target value range, stop the electric pressure pump (9), close the second stop valve (18), adjust the manual fine-tuning device (6) to make the pressure stable at the target value, record the value. After the measurement is completed, open the third stop valve (19) to relieve the pressure and complete the calibration.

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