An automated medicament injection pick

Abstract

This utility model belongs to the field of liquid transportation, specifically relating to an automated chemical injection skid, aiming to solve the problem of existing crude oil pipeline chemical injection relying on manual operation, resulting in inaccurate injection volume control and safety hazards such as hazardous chemical leaks and fires. This utility model includes a storage tank, a delivery pipeline, a first branch, a second branch, and a main pipeline; the storage tank is sealed and connected to one end of the delivery pipeline, and the other end of the delivery pipeline is sealed and connected to one end of the first branch and one end of the second branch respectively; the other ends of the first and second branches are sealed and connected to the inlet of the main pipeline, and the outlet of the main pipeline is the dosing port; wherein, electrically controlled valves are installed on the delivery pipeline, the first branch, the second branch, and the main pipeline. This utility model achieves automated and precise control, avoiding safety hazards.

Description

Technical Field

[0001] This utility model belongs to the field of liquid transportation, and specifically relates to an automated agent injection skid. Background Technology

[0002] During crude oil pipeline transportation and storage, various liquid chemicals, including drag reducers, pour point depressants, and pipeline cleaning agents, need to be added to the pipeline. To facilitate the addition of these liquid chemicals, an injection skid is typically installed at the pumping station. The injection skid allows for the long-term, stable addition of liquid chemicals. Currently, chemical agents used in oil fields are injected manually, making it impossible to precisely control the injection volume. This poses significant safety risks, especially when handling hazardous chemicals. Operational errors can lead to leaks, fires, and other accidents, threatening personnel health and environmental safety.

[0003] Based on this, the present invention proposes an automated drug injection skid. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, namely that the chemical injection of existing crude oil pipelines relies on manual operation, which leads to inaccurate control of the injection volume and safety hazards such as leakage of hazardous chemicals and fire, this utility model provides an automated chemical injection skid, including a storage tank, a delivery pipeline, a first branch, a second branch, and a main pipeline.

[0005] The storage tank is sealed and connected to one end of the delivery pipeline, and the other end of the delivery pipeline is sealed and connected to one end of the first branch and one end of the second branch, respectively.

[0006] The other end of the first branch and the other end of the second branch are sealed and connected to the inlet of the main pipeline, and the outlet of the main pipeline is the dosing port;

[0007] Electrically controlled valves are installed on the drug delivery pipeline, the first branch, the second branch, and the main pipeline.

[0008] Furthermore, one end of the medicine storage tank is sealed and connected to the unloading pipeline, and the other end of the unloading pipeline is sealed and connected to the ton barrel as a discharge port.

[0009] Furthermore, a stirrer is installed inside the medicine storage tank, which is used to stir the medicine.

[0010] Furthermore, the medicine storage tank is sealed and connected to one end of the backup pipeline, and the other end of the backup pipeline is connected to a floor drain.

[0011] Furthermore, the middle part of the drug delivery pipeline is sealed and connected to one end of the return pipeline, and the other end of the return pipeline is sealed and connected to the drug storage tank.

[0012] Furthermore, the drug delivery pipeline is sequentially equipped with a first shut-off valve, a first back pressure valve, a first pressure gauge, a first ball valve, a filter, and a second ball valve in the direction of delivery.

[0013] Furthermore, both the first branch and the second branch are sequentially equipped with a third ball valve, a metering pump, a safety valve, a second pressure gauge, a pressure transmitter, and a second shut-off valve in the direction of transport.

[0014] Furthermore, the second pressure gauge is connected to the first branch and the second branch via a buffer.

[0015] Furthermore, the main pipeline is equipped with a third shut-off valve and a check valve in sequence according to the delivery direction. The two ends of the third shut-off valve are respectively connected to one end of two fourth shut-off valves, and the other ends of the two fourth shut-off valves are connected to the two ends of the flow meter.

[0016] Furthermore, the middle part of the unloading pipeline is sealed and connected to one end of the first passage, and the other end of the first passage is sealed and connected to the main pipeline near the dosing port of the check valve.

[0017] The beneficial effects of this utility model are:

[0018] Precise reagent control: The flow rate of each pipeline is adjusted in real time through electronically controlled valves to eliminate human operation errors and ensure that the reagent injection ratio is precisely matched with the process requirements.

[0019] Multiple safety barriers: The dual-branch pipeline serves as a backup for each other, and with the automatic opening and closing of valves, the path is automatically switched in the event of a single-sided failure, which greatly reduces the risk of leakage or downtime caused by equipment failure.

[0020] Hazardous materials handling isolation: The fully sealed pipeline combined with the remote control system achieves physical isolation between humans and machines, avoiding direct contact between operators and toxic or flammable chemicals, thus preventing safety accidents from the source.

[0021] Intelligent Leakage Protection: Integrates pressure sensing and valve interlocking mechanisms to monitor abnormal pressure fluctuations in pipelines in real time, triggering fault isolation in milliseconds to form a locally closed protection unit.

[0022] Dynamic adjustment capability: Multi-branch pipelines support the time-sharing or mixed injection of different agents, and can quickly respond to changes in crude oil transportation conditions through coordinated control of valve groups.

[0023] Full lifecycle management: The modular structure design enables standardized operation of drug injection, cleaning, and maintenance processes, extending equipment lifespan while reducing operation and maintenance complexity. Attached Figure Description

[0024] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the system connection of an automated drug injection skid according to this utility model. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] like Figure 1 As shown, the first embodiment of this utility model proposes an automated drug injection skid, including a drug storage tank 1, a drug delivery pipeline 2, a first branch 3, a second branch 4, and a main pipeline 5;

[0029] The medicine storage tank 1 is sealed and connected to one end of the medicine delivery pipeline 2, and the other end of the medicine delivery pipeline 2 is sealed and connected to one end of the first branch 3 and one end of the second branch 4 respectively.

[0030] The other end of the first branch 3 and the other end of the second branch 4 are sealed and connected to the inlet of the main pipeline 5, and the outlet of the main pipeline 5 is the dosing port.

[0031] Among them, electrically controlled valves are installed on the drug delivery pipeline 2, the first branch 3, the second branch 4 and the main pipeline 5.

[0032] In this implementation, the medicine storage tank 1 is sealed to one end of the medicine delivery pipeline 2 via a flange, and the other end of the medicine delivery pipeline 2 is divided into a first branch 3 and a second branch 4 via a tee connector.

[0033] The other ends of the first branch 3 and the second branch 4 are connected to the main pipeline 5 via a manifold tee, and the end of the main pipeline 5 is the dosing port.

[0034] In this embodiment, when in use, the electrically controlled valve of the drug delivery pipeline 2 is opened, the electrically controlled valve of the first branch 3 is opened simultaneously, and the electrically controlled valve of the second branch 4 is closed.

[0035] The medicine is delivered from the storage tank 1 through the delivery pipeline 2 and the first branch 3 into the main pipeline 5, and finally injected into the target pipeline through the dosing port.

[0036] If the flow or pressure in the first branch 3 is abnormal, such as due to blockage:

[0037] The main control system closes the electrically controlled valve of the first branch 3 and simultaneously opens the electrically controlled valve of the second branch 4, switching the drug delivery to the second branch 4. The electrically controlled valve of the main pipeline 5 remains open to ensure continuous drug injection.

[0038] When it is necessary to increase the injection volume, the electrically controlled valves of the first branch 3 and the second branch 4 are opened simultaneously. By adjusting the opening ratio of the two branch valves, parallel injection of drugs through two paths can be achieved.

[0039] When an emergency shutdown signal is triggered: the electrically controlled valve of the drug delivery line 2 immediately closes to cut off the drug supply; the electrically controlled valves of the first branch 3 and the second branch 4 close simultaneously to block the branch path; the electrically controlled valve of the main line 5 closes to prevent backflow at the drug delivery port.

[0040] When cleaning a single branch offline: close the electrically controlled valve of the branch to be cleaned, such as the first branch 3; open the electrically controlled valves of the drug delivery line 2 and the second branch 4 to maintain drug injection in the other branch; connect the cleaning equipment through the reserved interface of the first branch 3 for rinsing.

[0041] In this embodiment, the drug delivery pipeline 2 is sequentially equipped with a first shut-off valve 21, a first back pressure valve 22, a first pressure gauge 23, a first ball valve 24, a filter 25, and a second ball valve 26 in the direction of delivery.

[0042] The first shut-off valve 21 is used for manual or remote opening to establish the main channel. The first back pressure valve 22 has a preset back pressure value, such as 0.5 MPa, to prevent pipeline pressure fluctuations from affecting downstream equipment. The first pressure gauge 23 is used to monitor the initial pressure of the drug delivery pipeline in real time and verify the function of the back pressure valve. The first ball valve 24 remains fully open, connecting to the filter inlet. The filter 25 is used to intercept particulate impurities in the drug, protecting downstream precision equipment such as metering pumps. The second ball valve 26 remains fully open, completing the connection of the drug delivery pipeline.

[0043] Both the first branch 3 and the second branch 4 are equipped with a third ball valve 31, a metering pump 32, a safety valve 33, a second pressure gauge 34, a pressure transmitter 35, and a second shut-off valve 36 in sequence according to the conveying direction.

[0044] In this embodiment, taking the first branch 3 as an example, the third ball valve 31 remains fully open, allowing the medicine to flow into the branch pipeline. The metering pump 32 receives feedback signals from the pressure transmitter 35 and accurately delivers the medicine at a set flow rate, such as 10 L / min. The safety valve 33 is used to set an overpressure threshold, such as 1.2 MPa, and automatically releases pressure to protect the pipeline in case of abnormal pressure. The second pressure gauge 34 is connected to the pipeline through a buffer 37, displaying the real-time pressure of the branch and reducing pulse interference. The pressure transmitter 35 converts the pressure signal into an electrical signal and feeds it back to the main control system to adjust the metering pump speed. The second shut-off valve 36 is opened under control, allowing the medicine to enter the main pipeline 5.

[0045] In this embodiment, the metering pump 32 is a hydraulic diaphragm metering pump, which is connected to the motor drive. The dosage can be manually adjusted according to the actual needs on site. The flow rate adjustment range of the metering pump 32 is 10-50L, and the metering error is ±1%. It can also receive control signals from the central control room to remotely adjust the flow rate of the metering pump by frequency conversion.

[0046] The second pressure gauge 34 is connected to the first branch 3 and the second branch 4 via a buffer 37.

[0047] When pressure transmitter 35 detects an abnormal pressure, the main control system immediately closes the third ball valve 31 and the second shut-off valve 36 of the faulty branch, switches to the second branch 4, and repeats the above drug injection process.

[0048] The main pipeline 5 is equipped with a third shut-off valve 51 and a check valve 52 in sequence according to the conveying direction. The two ends of the third shut-off valve 51 are respectively connected to one end of two fourth shut-off valves 53, and the other ends of the two fourth shut-off valves 53 are connected to the two ends of the flow meter 54.

[0049] The third shut-off valve 51 remains fully open, serving as the main channel for the main pipeline. The check valve 52 prevents backflow of crude oil pipeline media from contaminating the chemical system. The fourth shut-off valve 53 is normally closed. When the flow meter 54 needs to be calibrated, the fourth shut-off valve 53 is opened and the third shut-off valve 51 is closed, allowing the chemical to flow through the flow meter 54. The flow meter 54 measures the total injection volume and cross-verifies the data with the metering pump 32. An alarm is triggered when the accuracy error is greater than 2%.

[0050] In this embodiment, the medicine storage tank 1 is sealed and connected to one end of the medicine unloading pipeline 6, and the other end of the medicine unloading pipeline 6 is sealed and connected to the ton barrel as a discharge port. The medicine unloading pipeline 6 is provided with a first centrifugal pump 61 and a fifth ball valve 62 in sequence according to the flow channel direction.

[0051] This embodiment also includes a control cabinet 55 containing a PLC communication module, comprising:

[0052] PLC main control unit: As the brain of the system, it receives sensor signals, executes logic control, and drives actuators (such as electric valves and metering pumps).

[0053] Communication module: Supports Modbus TCP / IP, Profinet and other protocols to realize data interaction with host computer (SCADA / DCS) and smart instruments (flow meter 54, pressure transmitter 35).

[0054] I / O module:

[0055] Digital Input (DI): Receives valve status (open / closed) and emergency stop button signals;

[0056] Analog Input (AI): Acquires 4-20mA signals from pressure transmitter 35 and flow meter 54;

[0057] Digital output (DO): controls the opening and closing of all valves and alarm indicator lights;

[0058] Analog Output (AO): Adjusts the speed of metering pump 32 and the opening of the back pressure valve.

[0059] HMI (Human Machine Interface): Provides a visual operation panel that displays parameters such as pressure, flow rate, and valve status, and supports parameter setting and mode switching.

[0060] Redundant power supply: Dual 24VDC power supply to ensure uninterrupted system operation.

[0061] PLC control logic and function implementation:

[0062] When the pressure transmitter 35 detects that the pressure of the first branch 3 and the second branch 4 exceeds the limit, the PLC automatically closes the faulty third ball valve 31 or the second shut-off valve 36 and opens the backup branch valve, with a switching time of ≤1 second.

[0063] Based on feedback from flow meter 54, the frequency of metering pump 32 is adjusted by PID control to maintain a constant injection volume (±1% error).

[0064] When the emergency stop signal is triggered, the PLC simultaneously closes all valves and activates the audible and visual alarms.

[0065] Communications and Data Management:

[0066] Remote monitoring: Real-time data (pressure, flow, valve status) is uploaded to the central control room via the communication module, and OPC UA protocol is supported for integration with third-party platforms.

[0067] Event logging: Stores alarm logs (such as "First branch pressure too high - 2023 / 10 / 05 14:30"), and supports exporting via USB flash drive or transferring via network.

[0068] Firmware upgrade: Supports online PLC program updates without downtime.

[0069] In this embodiment, a level gauge is also installed in the storage tank 1 to monitor the remaining amount of the medicine.

[0070] The second embodiment of this utility model proposes an automated drug injection skid. Based on the first embodiment, a stirrer 7 is installed inside the drug storage tank 1. The stirrer 7 is used to stir the drug and is connected to a rotary motor drive.

[0071] The third embodiment of this utility model proposes an automated drug injection skid. Based on the first or second embodiment, the drug storage tank 1 is sealed and connected to one end of the backup pipeline 8, and the other end of the backup pipeline 8 is connected to the floor drain 9.

[0072] A fourth ball valve 81 is installed on the backup pipeline 8.

[0073] The fourth ball valve 81 remains normally closed, cutting off the connection between the medicine storage tank 1 and the floor drain 9, ensuring that the medicine is delivered to the branch pipeline only through the main medicine delivery pipeline 2.

[0074] The main control system monitors the status of the fourth ball valve 81. If it is accidentally opened, it will trigger an alarm and lock the valve 2 of the main drug delivery pipeline to prevent accidental discharge of the drug.

[0075] In this embodiment, when active drainage is required, the first shut-off valve 21, the first ball valve 24, and the second ball valve 26 of the drug delivery pipeline 2 are closed to block the delivery of the drug to the first branch 3 and the second branch 4.

[0076] Open the backup pipeline: Manually or remotely open the fourth ball valve 81, and the medicine in the medicine tank 1 flows to the floor drain 9 through the backup pipeline 8.

[0077] Emptying monitoring: The emptying progress is confirmed by the liquid level sensor of the medicine storage tank 1. After the liquid is drained, the fourth ball valve 81 is closed immediately.

[0078] In this embodiment, when passive drainage is required, if the pressure sensor of the medicine storage tank 1 detects overpressure (e.g., >1.5 times the rated pressure) or a leak occurs in the tank, the main control system performs the following actions:

[0079] Close all valves in the drug delivery pipeline 2, namely, close the first shut-off valve 21, the first ball valve 24, and the second ball valve 26;

[0080] Isolation main system: Automatically opens the fourth ball valve 81 to guide the hazardous agent through the backup pipeline 8 to be discharged into the floor drain 9, avoiding tank rupture or environmental pollution.

[0081] In this embodiment, one end of the backup pipeline 8 is sealed and connected to the bottom of the medicine storage tank 1 to prevent any remaining medicine from being drained.

[0082] The side wall of the medicine storage tank 1 is sealed and connected to one end of the second passage 82, and the other end of the second passage 82 is sealed and connected to the spare pipeline 8 between the fourth ball valve 81 and the floor drain 9.

[0083] When the pressure in the medicine storage tank 1 exceeds the safety threshold, the main control system automatically opens the fourth ball valve 81, and the high-pressure medium in the tank is simultaneously released to the floor drain 9 through the backup pipeline 8 and the second passage 82, increasing the pressure relief speed by more than 50%.

[0084] A valve can also be installed on the second passage 82. When the medicine in the storage tank 1 separates due to density differences, a specific liquid layer is selectively discharged to perform the stratification discharge operation.

[0085] Discharge of upper liquid: Open only the valve corresponding to the second passage 82 to preferentially discharge the upper low-density agent through the side wall outlet;

[0086] Switch to backup pipeline 8: After the upper layer is emptied, open the fourth ball valve 81 to discharge the high-density agent in the lower layer.

[0087] The fourth embodiment of this utility model proposes an automated drug injection skid, which, based on the first, second, or third embodiment, further includes:

[0088] The middle part of the drug delivery pipeline 2 is sealed and connected to one end of the return pipeline 10, and the other end of the return pipeline 10 is sealed and connected to the drug storage tank 1.

[0089] The return pipeline 10 is provided with a second centrifugal pump 101 and a fifth ball valve 102 in sequence according to the return direction;

[0090] In this embodiment, a return line 10 is provided to maintain a stable pressure in the drug delivery line 2 and avoid overpressure or flow fluctuations.

[0091] The second centrifugal pump 101 is linked with the main control system to actively control the return flow and accurately maintain the pressure stability of the drug delivery pipeline 2.

[0092] The fifth embodiment of this utility model proposes an automated drug injection skid, based on the first, second, third, or fourth embodiment, and further includes: the middle part of the unloading pipeline 6 is sealed and connected to one end of the first passage 63, and the other end of the first passage 63 is sealed and connected to the summing pipeline 5 on the side of the check valve 52 near the drug injection port.

[0093] The first passage 63 is equipped with a sixth shut-off valve 64.

[0094] The check valve 52 of the main pipeline 5 only allows the agent to flow in one direction from the branch pipeline to the dosing port. However, when the system needs to perform reverse operations such as venting, backflushing, or depressurization, the check valve will block the flow path.

[0095] Therefore, in this embodiment, the first passage 63 is connected to the unloading pipeline 6 and the downstream collection pipeline 5 of the check valve 52 via a bypass, thus bypassing the one-way restriction of the check valve and allowing the agent / medium to flow in reverse.

[0096] In addition, if the dosing port is blocked, causing overpressure in the main pipeline 5, the first passage 63 serves as a pressure relief channel, quickly guiding the high-pressure agent to be safely discharged through the unloading pipeline 6.

[0097] In this embodiment, when cleaning the main pipeline 5, cleaning agent is injected from the unloading pipeline 6 and back-flushed through the first passage 63 to remove deposits near the check valve 52.

[0098] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0099] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0100] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0101] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An automated drug injection skid, characterized in that, It includes a medicine storage tank (1), a medicine delivery pipeline (2), a first branch (3), a second branch (4), and a main pipeline (5); The medicine storage tank (1) is sealed and connected to one end of the medicine delivery pipeline (2), and the other end of the medicine delivery pipeline (2) is sealed and connected to one end of the first branch (3) and one end of the second branch (4); The other end of the first branch (3) and the other end of the second branch (4) are sealed and connected to the inlet of the main pipeline (5), and the outlet of the main pipeline (5) is the dosing port; Among them, electrically controlled valves are installed on the drug delivery pipeline (2), the first branch (3), the second branch (4) and the main pipeline (5).

2. The automated drug injection skid according to claim 1, characterized in that, The storage tank (1) is sealed and connected to one end of the unloading pipeline (6), and the other end of the unloading pipeline (6) is sealed and connected to the ton barrel as a discharge port.

3. The automated drug injection skid according to claim 1, characterized in that, The storage tank (1) is equipped with a stirrer (7), which is used to stir the medicine.

4. The automated drug injection skid according to claim 1, characterized in that, The medicine storage tank (1) is sealed and connected to one end of the backup pipeline (8), and the other end of the backup pipeline (8) is connected to the floor drain (9).

5. The automated drug injection skid according to claim 1, characterized in that, The middle part of the drug delivery pipeline (2) is sealed and connected to one end of the return pipeline (10), and the other end of the return pipeline (10) is sealed and connected to the drug storage tank (1).

6. The automated drug injection skid according to claim 1, characterized in that, The drug delivery pipeline (2) is equipped with a first shut-off valve (21), a first back pressure valve (22), a first pressure gauge (23), a first ball valve (24), a filter (25), and a second ball valve (26) in sequence according to the delivery direction.

7. The automated drug injection skid according to claim 1, characterized in that, The first branch (3) and the second branch (4) are each equipped with a third ball valve (31), a metering pump (32), a safety valve (33), a second pressure gauge (34), a pressure transmitter (35), and a second shut-off valve (36) in sequence according to the conveying direction.

8. The automated drug injection skid according to claim 7, characterized in that, The second pressure gauge (34) is connected to the first branch (3) and the second branch (4) via a buffer (37).

9. The automated drug injection skid according to claim 2, characterized in that, The main pipeline (5) is equipped with a third shut-off valve (51) and a check valve (52) in sequence according to the conveying direction. The two ends of the third shut-off valve (51) are respectively connected to one end of two fourth shut-off valves (53), and the other ends of the two fourth shut-off valves (53) are connected to the two ends of the flow meter (54).

10. An automated drug injection skid according to claim 9, characterized in that, The middle part of the unloading pipeline (6) is sealed and connected to one end of the first passage (63), and the other end of the first passage (63) is sealed and connected to the main pipeline (5) near the dosing port of the check valve (52).

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