High-pressure shield pump sight glass self-flushing system and flushing method

Abstract

The utility model relates to a kind of high-pressure shielded pump sight glass self-flushing system and flushing method, relating to high-pressure shielded pump on-line monitoring and automatic cleaning maintenance technical field, including shielded pump sight glass module, flushing execution module, pressure stabilizing filter module and monitoring feedback module;Shielded pump sight glass module includes installation bottom plate, the upper surface of installation bottom plate is sequentially provided with front pump cylinder, sight glass cylinder and rear pump cylinder along transverse direction, and sight glass cylinder is transparent glass cylinder.The utility model solves the problem that the existing high-pressure shielded pump sight glass is not completely cleaned during use, there is observation blind area, flushing pressure is unstable, needs to be stopped, manual operation and maintenance cost is high, lacks safety protection, structure is fixed, cleaning component is not replaceable, and the problems such as poor adaptability.

Description

Technical Field

[0001] This invention relates to the field of online monitoring and automatic cleaning and maintenance technology for high-pressure shielded pumps, specifically to a self-flushing system and flushing method for the sight glass of a high-pressure shielded pump. Background Technology

[0002] In industrial fields such as oil and gas transportation and chemical fluid transfer, high-pressure canned motor pumps are core equipment for achieving long-distance, high-pressure transportation of media. To monitor the flow status of the media in the pump body and pipeline in real time and avoid equipment failure caused by abnormal media, a sight glass device needs to be installed in the canned motor pump pipeline. The flow rate, cleanliness, and operational stability of the media can be directly observed through the transparent sight glass tube. This is a key link to ensure the safe and reliable operation of the entire transportation system.

[0003] However, in actual operation, the medium in the high-pressure pipeline often carries tiny particulate impurities. After long-term operation, these impurities gradually adhere to the inner wall of the sight glass tube, forming a layer of dirt that is difficult to clean. Under certain operating conditions, the medium may also cause scaling due to changes in temperature and pressure, further obstructing the observation line of sight. To address this problem, existing technologies mostly rely on manual periodic disassembly and wiping or external simple flushing pipelines. This is not only cumbersome to operate and has a short maintenance cycle, but it is also ineffective at cleaning stubborn scale, and can easily lead to safety hazards due to blind spots in the observation.

[0004] Meanwhile, existing flushing solutions generally suffer from a lack of pressure control. The flushing medium pressure relies entirely on manual experience for adjustment, which can easily damage the sight glass and pipeline sealing structure due to improper pressure. Furthermore, flushing operations require shutdown and pipe disconnection, severely impacting the continuous operating efficiency of the delivery system. In addition, under manual operation and maintenance, the timing of sight glass cleaning depends entirely on the judgment of inspection personnel, making precise timed cleaning impossible. This results in both untimely cleaning and potential equipment damage due to over-cleaning. Moreover, the entire cleaning process lacks effective pressure monitoring and safety protection mechanisms, failing to automatically warn or shut down when pipelines are overpressurized, posing a significant safety risk to system operation.

[0005] On the other hand, the characteristics of media and the types of impurities vary greatly in different industrial scenarios, and the requirements for cleaning methods also differ. However, the cleaning components of traditional sight glasses are fixed and cannot be replaced, and the observation angle is limited, making it difficult to adapt to diverse working conditions.

[0006] Against this backdrop, developing a high-pressure shielded pump sight glass self-flushing system that can achieve automatic cleaning, pressure control, safety monitoring, and strong adaptability has become an urgent need to solve the pain points of existing technologies and improve the operational stability of high-pressure transmission systems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a self-rinsing system and method for high-pressure shielded pump sight glasses, which solves the problems of incomplete cleaning leading to blind spots, unstable rinsing pressure requiring shutdown, high manual maintenance costs and lack of safety protection, fixed structure, non-replaceable cleaning components, and poor adaptability in existing high-pressure shielded pump sight glasses during use.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A high-pressure shielded pump sight glass self-flushing system includes a shielded pump sight glass module, a flushing execution module, a pressure stabilizing filter module, and a monitoring feedback module.

[0010] As an optimized solution, the shielded pump sight glass module includes a mounting base plate, which is a horizontally arranged square plate, and mounting bolts are provided at the four corners of the mounting base plate.

[0011] As an optimized solution, the upper surface of the mounting base plate is provided with a front pump cylinder, a sight glass cylinder and a rear pump cylinder in sequence along the transverse direction, and the sight glass cylinder is a transparent glass cylinder.

[0012] As an optimized solution, two sets of support frames are fixed on one side of the upper surface of the mounting base plate, and the front pump cylinder is fixedly clamped onto the two sets of support frames.

[0013] As an optimized solution, a front connecting seat is provided between the front pump barrel and the sight glass barrel. The lower end of the front connecting seat is fixed to the upper surface of the mounting base plate. The front connecting seat has an opening in the middle. The front pump barrel and the sight glass barrel are respectively fixed to the outer end faces on both sides of the opening of the front connecting seat.

[0014] As an optimized solution, a rear connecting seat is provided between the sight glass barrel and the rear pump barrel. The lower end of the rear connecting seat is fixed to the upper surface of the mounting base plate. The rear connecting seat has an opening in the middle. The sight glass barrel and the rear pump barrel are respectively fixed to the outer end faces on both sides of the opening of the rear connecting seat.

[0015] As an optimized solution, a diversion oil inlet pipe is fixed on the front pump barrel and communicates with it. The diversion oil inlet pipe extends longitudinally and its end is connected to the main oil and gas transmission pipeline.

[0016] As an optimized solution, a diversion return oil pipe is fixed on the rear pump cylinder and connected thereto. The diversion return oil pipe extends longitudinally and its end is also connected to the main oil and gas transmission pipeline.

[0017] As an optimized solution, a closed end cap is fixed on the outer wall of the open end of the front pump cylinder, and a sealing partition is fixed on the inner peripheral wall of the front pump cylinder.

[0018] As an optimized solution, a flow divider box is fixed on the outer wall of the opening end of the rear pump cylinder. The flow divider box is a horizontally extending double-layer cylindrical tube. A circular partition is fixed on the inner peripheral wall of the flow divider box near the opening end. Several observation ports are opened on the horizontal outer end face of the flow divider box. The several observation ports are centrally symmetrically arranged, and a glass window is fixed in each observation port.

[0019] As an optimized solution, the flushing execution module includes a flushing supply pump and a rotary drive motor. The flushing supply pump is located on the lateral side of the diversion box, and the rotary drive motor is located on the lateral side of the front pump cylinder.

[0020] As an optimized solution, a first support base is fixed to one side of the upper surface of the mounting base plate. The first support base is a U-shaped base with the opening facing downwards, and the rotary drive motor is fixed on the first support base.

[0021] As an optimized solution, the output shaft end of the rotary drive motor passes through the closed end cover and the sealing partition in sequence and is fixed with a supporting turntable.

[0022] As an optimized solution, a second support is fixed on the other side of the upper surface of the mounting base plate. The second support is a U-shaped seat with the opening facing downwards, and the flushing supply pump is fixed on the second support.

[0023] As an optimized solution, a flushing supply pipe is fixedly connected to the transverse side end face of the flushing supply pump, and the end of the flushing supply pipe passes through the circular partition and extends into the diversion box.

[0024] As an optimized solution, a three-way pipe connector is rotatably mounted at the end of the flushing supply pipe, and two symmetrical flushing bends are fixed on the three-way pipe connector. The end of each flushing bend is fixed to the side end face of the support turntable.

[0025] As an optimized solution, several intermediate flushing pipes are fixed between the two flushing bends, and these intermediate flushing pipes are located inside the sight glass tube.

[0026] As an optimized solution, the upper and lower ends of each of the flushing intermediate pipes are respectively connected to two of the flushing bends, and two symmetrically arranged pressurized flushing nozzles are fixed on each of the flushing intermediate pipes.

[0027] As an optimized solution, the installation angle of the intermediate flushing pipe can be adaptively adjusted according to actual needs during installation, and the pressurized flushing nozzle can also adopt a direct spray or oblique spray (i.e., oblique flushing nozzle) structure according to the flushing angle requirements.

[0028] As an optimized solution, each of the flushing bends is fixed with a laterally extending cleaning scraper, which is set close to the inner peripheral wall of the sight glass tube.

[0029] As an optimized solution, the pressure stabilizing filter module includes a drain pipe, the initial end of which passes through the outer wall of the distribution box and extends into the internal space of its inner cylinder. The drain pipe is equipped with a drain check valve.

[0030] As an optimized solution, the pressure stabilizing filter module also includes a return pipe, the initial end of which is fixedly connected to the flushing supply pipe, and a return check valve is provided on the return pipe.

[0031] As an optimized solution, the pressure stabilizing filter module also includes a high-pressure filter, which is fixed to the upper surface of the mounting base plate, and the ends of the drain pipe and the return pipe are respectively fixedly connected to the high-pressure filter.

[0032] As an optimized solution, a pressure regulating valve is provided on the outer peripheral wall of the drainage tube near the end section, and the pressure regulating valve is also provided on the outer peripheral wall of the return tube near the end section. The two pressure regulating valves are connected by a pressure stabilizing pipe to achieve linkage and balance adjustment of flushing pressure.

[0033] As an optimized solution, the monitoring and feedback module includes a PLC controller, which is a small programmable logic controller that supports timed flushing parameter settings (flushing cycle adjustable from 1 to 24 hours, flushing duration adjustable from 5 to 30 seconds).

[0034] As an optimized solution, the PLC controller is fixedly equipped with a monitoring pipeline assembly connected thereto. The monitoring pipeline assembly includes a monitoring horizontal pipe, and two monitoring vertical pipes are fixedly connected to the monitoring horizontal pipe. The lower end of one of the monitoring vertical pipes is fixed to the front connecting seat and extends to its inner circumferential wall, while the lower end of the other monitoring vertical pipe is fixed to the distributor box and extends to its outer inner wall.

[0035] As an optimized solution, an overflow connection port is provided on the inner wall of the inner ring of the diversion box.

[0036] As an optimized solution, each of the monitoring horizontal pipes is equipped with a safety valve and a pressure gauge, and each of the monitoring vertical pipes is equipped with a one-way valve.

[0037] As an optimized solution, the middle section of the monitoring horizontal tube is also equipped with a solenoid valve, which is connected to the PLC controller via a cable.

[0038] As an optimized solution, when using a self-flushing system to flush the sight glass of the high-pressure shielded pump, the specific flushing method is as follows: when the preset flushing cycle is reached or a manual start signal is received, the PLC controller triggers the flushing program.

[0039] First, open the diversion stop valve and the return stop valve to allow the diversion medium from the main oil and gas pipeline to flow into the pressure stabilizing and filtration module. After filtration and pressure stabilization, it is used as the flushing medium. Second, start the flushing supply pump and the rotary drive motor to perform rotary spraying and scraping.

[0040] Meanwhile, the pipeline pressure is monitored in real time by a pressure gauge, and the PLC controller adjusts the flushing supply pump power or the opening of the pressure regulating valve based on the pressure feedback.

[0041] After the preset rinsing time is reached, each actuator is shut down in sequence, and the system returns to standby mode.

[0042] Compared with the prior art, the beneficial effects of the present invention are:

[0043] 1. Significantly improves the efficiency of sight glass cleaning and the reliability of observation.

[0044] The system adopts a combined cleaning method of high-pressure jetting and mechanical scraping, which solves the problem that a single flushing method cannot thoroughly clean stubborn scale: During operation, the rotary drive motor drives the flushing bend, the flushing intermediate pipe and the cleaning scraper to move in a circular motion along the inner wall of the sight glass. The high-pressure medium sprayed by the pressurized flushing nozzle can impact and peel off the impurities attached to the inner wall of the sight glass, while the synchronously rotating cleaning scraper mechanically scrapes the inner wall. The two effects are combined to achieve efficient cleaning.

[0045] Meanwhile, the replaceable angled flushing pipe and angled flushing nozzle can adjust the media spray angle to form a specific impact angle with the scale, achieving precise cleaning of stubborn dirt under different working conditions, effectively avoiding blind spots in the observation of media flow status caused by sight glass contamination, and ensuring that operators can monitor the operation of media in the pipeline in real time.

[0046] 2. Ensure a stable and controllable flushing process to avoid damage to the sight glass and pipelines.

[0047] The design of the pressure-stabilizing filter module solves the problem of equipment damage caused by fluctuations in flushing pressure: the pressure regulating valves on the drain pipe and return pipe form a pressure linkage regulation mechanism through the pressure stabilizing pipe, which can accurately control the flushing medium pressure, avoiding both excessive pressure that could cause the sight glass to break and seals to be damaged, and excessive pressure that could affect the flushing effect.

[0048] The high-pressure filter filters the circulating medium to prevent new impurities from adhering to the inner wall of the sight glass during the rinsing process, ensuring the cleanliness of the sight glass after rinsing.

[0049] Meanwhile, the flushing medium circuit operates independently from the main oil and gas pipeline, and the flushing process does not interfere with the normal transport of the medium in the main pipeline, realizing online flushing and non-stop maintenance, which greatly improves the continuity of equipment operation.

[0050] 3. Achieve intelligent operation and full-process security protection, reducing manual operation and maintenance costs.

[0051] The monitoring and feedback module relies on the PLC controller to build an automated and intelligent operation system: the system supports flexible setting of rinsing cycle and rinsing duration, and can complete timed cleaning without manual supervision, which significantly reduces the workload of manual operation and maintenance.

[0052] Two monitoring risers collect the medium pressure in the front connection seat and the distribution box respectively, and the data is fed back to the pressure gauge in real time, so that the operator can intuitively grasp the system status;

[0053] The safety valve can automatically open to release pressure when the pipeline pressure exceeds a preset threshold. The PLC controller, through linkage with the solenoid valve, automatically adjusts the operating power of the flushing supply pump based on pressure monitoring data, or triggers shutdown protection when the pressure is abnormal. This fundamentally avoids safety hazards such as pipeline rupture and media leakage caused by overpressure operation, and improves the safety and reliability of system operation.

[0054] 4. Enhance system structural compatibility and operating condition adaptability

[0055] The shielded pump sight glass module adopts a modular assembly structure. The front pump cylinder, sight glass cylinder, and rear pump cylinder are fixed to the mounting base plate through the front connecting seat and the rear connecting seat, which makes disassembly and assembly convenient and facilitates later maintenance and replacement.

[0056] The shunt box features a centrally symmetrical observation port and glass window, which, together with a transparent viewing tube, enables multi-directional observation to meet the needs of different observation angles.

[0057] Meanwhile, the interchangeable design of the intermediate flushing pipe and the inclined flushing pipe allows the system to flexibly adjust the flushing scheme according to the type of medium and the characteristics of impurities, adapting to the high-pressure shielded pump sight glass cleaning needs under different working conditions, and possessing strong versatility and expandability. Attached Figure Description

[0058] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0059] Figure 1 This is a schematic diagram of the overall external structure of each module in the present invention from the main viewing direction;

[0060] Figure 2 This is a schematic diagram of the overall external structure of each module in the present invention from a top-down perspective;

[0061] Figure 3 This is a schematic diagram of the overall external structure of each module in the present invention from the left-side view direction;

[0062] Figure 4 This is a schematic diagram of the overall external structure of each module in the present invention from the right-side view direction;

[0063] Figure 5 For the present invention along Figure 2 A schematic diagram of the internal structure cut along line AA.

[0064] Figure 6 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the middle BB line;

[0065] Figure 7 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the CC line;

[0066] Figure 8 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the DD line in the middle;

[0067] Figure 9 For the present invention along Figure 3 A half-section diagram of the three-dimensional structure cut along the EE line;

[0068] Figure 10 This is an isometric schematic diagram of the three-dimensional structure of the present invention;

[0069] Figure 11 This is a three-dimensional structural diagram of the second pipeline arrangement of the flushing execution module in this invention;

[0070] Figure 12 This is a front view schematic diagram of the second pipeline arrangement of the flushing execution module in this invention;

[0071] Figure 13 This is a top view schematic diagram of the second pipeline arrangement of the flushing execution module in this invention.

[0072] In the diagram: 1-Mounting base plate, 2-Front pump barrel, 3-Sight glass barrel, 4-Rear pump barrel, 5-Support frame, 6-Front connecting seat, 7-Rear connecting seat, 8-Diverter inlet pipe, 9-Diverter return pipe, 10-Closed end cap, 11-Sealing partition, 12-Diverter box, 13-Circular partition, 14-Observation port, 15-Glass window, 16-Flush supply pump, 17-Rotary drive motor, 18-First support seat, 19-Support turntable, 20-Second support seat, 21-Flush supply pipe, 22-Tee connector 23-Flushing bend, 24-Flushing intermediate pipe, 25-Pressure flushing nozzle, 26-Cleaning scraper, 27-Drainage pipe, 28-Drainage check valve, 29-Return pipe, 30-Return check valve, 31-High pressure filter, 32-Pressure regulating valve, 33-Pressure stabilizing pipe, 34-PLC controller, 35-Monitoring horizontal pipe, 36-Monitoring vertical pipe, 37-Overflow connection port, 38-Safety valve, 39-Pressure gauge, 40-Check valve, 41-Solenoid valve, 42-Angled flushing pipe, 43-Angled flushing nozzle. Detailed Implementation

[0073] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0074] like Figures 1 to 10 The first embodiment shown is a high-pressure shielded pump sight glass self-flushing system, which includes a shielded pump sight glass module, a flushing execution module, a pressure stabilizing filter module, and a monitoring feedback module.

[0075] The shielded pump sight glass module includes a mounting base plate 1, which is a horizontally arranged square plate, and mounting bolts are provided at the four corners of the mounting base plate 1.

[0076] The upper surface of the mounting base plate 1 is provided with a front pump cylinder 2, a sight glass cylinder 3 and a rear pump cylinder 4 in a transverse direction, wherein the sight glass cylinder 3 is a transparent glass cylinder.

[0077] Two sets of support frames 5 are fixed on one side of the upper surface of the mounting base plate 1, and the front pump cylinder 2 is fixedly clamped on the two sets of support frames 5.

[0078] A front connecting seat 6 is provided between the front pump cylinder 2 and the sight glass cylinder 3. The lower end of the front connecting seat 6 is fixed on the upper surface of the mounting base plate 1. The front connecting seat 6 has an opening in the middle. The front pump cylinder 2 and the sight glass cylinder 3 are respectively fixed on the outer end faces on both sides of the opening of the front connecting seat 6.

[0079] A rear connecting seat 7 is provided between the sight glass barrel 3 and the rear pump barrel 4. The lower end of the rear connecting seat 7 is fixed on the upper surface of the mounting base plate 1. The middle opening of the rear connecting seat 7 is provided, and the sight glass barrel 3 and the rear pump barrel 4 are respectively fixed on the outer end faces on both sides of the opening of the rear connecting seat 7.

[0080] A branch oil inlet pipe 8 is fixed on the front pump cylinder 2 and is connected to it. The branch oil inlet pipe 8 extends longitudinally and the end of the branch oil inlet pipe 8 is connected to the main oil and gas transmission pipeline.

[0081] A diversion return oil pipe 9 is fixed on the rear pump cylinder 4 and connected to it. The diversion return oil pipe 9 extends longitudinally and its end is also connected to the main oil and gas transmission pipeline.

[0082] A closed end cap 10 is fixed on the outer wall of the open end of the front pump cylinder 2, and a sealing partition 11 is fixed on the inner circumferential wall of the front pump cylinder 2.

[0083] A diversion box 12 is fixed on the outer wall of the opening end of the rear pump cylinder 4. The diversion box 12 is a horizontally extending double-layer cylindrical tube. A circular partition 13 is fixed on the inner peripheral wall of the diversion box 12 near the opening end. Several observation ports 14 are opened on the horizontal outer end face of the diversion box 12. The several observation ports 14 are symmetrically arranged in the center. A glass window 15 is fixed in each observation port 14.

[0084] The flushing execution module includes a flushing supply pump 16 and a rotary drive motor 17. The flushing supply pump 16 is located on the lateral side of the diversion box 12, and the rotary drive motor 17 is located on the lateral side of the front pump cylinder 2.

[0085] A first support base 18 is fixed on one side of the upper surface of the mounting base plate 1. The first support base 18 is a U-shaped base with the opening facing downwards. The rotary drive motor 17 is fixed on the first support base 18.

[0086] The output shaft of the rotary drive motor 17 passes through the closed end cover 10 and the sealing partition 11 in sequence and is fixed with the supporting turntable 19.

[0087] A second support 20 is fixed on the other side of the upper surface of the mounting base plate 1. The second support 20 is a U-shaped seat with the opening facing downwards. The flushing supply pump 16 is fixed on the second support 20.

[0088] A flushing supply pipe 21 is fixedly connected to the transverse side end face of the flushing supply pump 16. The end of the flushing supply pipe 21 passes through the circular partition 13 and extends into the diversion box 12.

[0089] The end of the flushing supply pipe 21 is rotatably fitted with a three-way pipe connector 22. Two symmetrical flushing bends 23 are fixed on the three-way pipe connector 22. The end of each flushing bend 23 is fixed to the side end face of the support turntable 19.

[0090] Several intermediate flushing pipes 24 are fixed between the two flushing bends 23, and the several intermediate flushing pipes 24 are located inside the sight tube 3.

[0091] Each flushing intermediate pipe 24 is connected to two flushing bends 23 at its upper and lower ends respectively. Each flushing intermediate pipe 24 is fixed with two symmetrical front and rear pressurized flushing nozzles 25. The spray pressure of the pressurized flushing nozzles 25 is 0.5-2.0MPa.

[0092] Each flushing bend 23 has a horizontally extending cleaning scraper 26 fixed on its outer wall. The cleaning scraper 26 is set close to the inner peripheral wall of the sight glass tube 3 and is made of wear-resistant rubber.

[0093] The pressure stabilizing filter module includes a drain pipe 27. The initial end of the drain pipe 27 passes through the outer cylinder wall of the distribution box 12 and extends into the internal space of its inner cylinder. A drain stop valve 28 is provided on the drain pipe 27.

[0094] The pressure stabilizing filter module also includes a return pipe 29, the initial end of which is fixedly connected to the flushing supply pipe 21. A return check valve 30 is provided on the return pipe 29, and the state of the medium in the distribution box 12 can be observed through the glass window 15.

[0095] The pressure stabilizing filter module also includes a high-pressure filter 31, which is fixed on the upper surface of the mounting base plate 1. The ends of the drain pipe 27 and the return pipe 29 are respectively fixedly connected to the high-pressure filter 31.

[0096] A pressure regulating valve 32 is provided on the outer peripheral wall of the end section of the drainage pipe 27, and a pressure regulating valve 32 is also provided on the outer peripheral wall of the end section of the return pipe 29. The two pressure regulating valves 32 are connected by a pressure stabilizing pipe 33.

[0097] The monitoring and feedback module includes a PLC controller 34, which is a small programmable logic controller that supports timed flushing parameter settings (flushing cycle adjustable from 1 to 24 hours, flushing duration adjustable from 5 to 30 seconds).

[0098] The PLC controller 34 is fixed with a monitoring pipeline assembly connected thereto. The monitoring pipeline assembly includes a monitoring horizontal pipe 35, and two monitoring vertical pipes 36 are fixedly connected to the monitoring horizontal pipe 35. The lower end of one monitoring vertical pipe 36 is fixed to the front connecting seat 6 and extends to its inner circumferential wall. The lower end of the other monitoring vertical pipe 36 is fixed to the diversion box 12 and extends to its outer inner wall.

[0099] An overflow connection port 37 is provided on the inner wall of the inner ring of the distribution box 12.

[0100] Safety valve 38 and pressure gauge 39 are installed on each horizontal monitoring pipe 35, and one-way valve 40 is installed on each vertical monitoring pipe 36.

[0101] A solenoid valve 41 is also installed in the middle section of the monitoring horizontal tube 35. The solenoid valve 41 is connected to the PLC controller 34 via a cable.

[0102] like Figures 11 to 13 In the second embodiment shown, the intermediate flushing pipe 24 between the two flushing bends 23 can be replaced with an oblique flushing pipe 42. Each oblique flushing pipe 42 has two oblique flushing nozzles 43 fixed on it. The above scheme can change the spray angle of the flushing medium so that it forms a specific flushing angle with the impurities and scale attached to the inner wall of the sight glass barrel 3. Combined with the rotation flushing method, it can effectively flush stubborn dirt.

[0103] When using this invention:

[0104] When the system is in the initial standby state, the medium in the main oil and gas transmission pipeline flows into the front pump cylinder 2 through the diversion oil inlet pipe 8, passes through the front connecting seat 6, the sight glass cylinder 3, and the rear connecting seat 7 in sequence, and finally enters the rear pump cylinder 4 and flows back to the main pipeline through the diversion return oil pipe 9, forming a medium flow loop.

[0105] At this time, the operator can use the transparent sight glass tube 3, along with the glass window 15 of the observation port 14 of the diversion box 12, to observe the flow status of the medium in the pipeline in real time.

[0106] When the system has been running for a long time and a large amount of impurities or dirt have accumulated on the surface of the sight glass 3, affecting observation, the PLC controller 34 triggers a rinsing command according to preset parameters, and the system enters the self-rinsing stage:

[0107] On one hand, the rotary drive motor 17 starts, and its output shaft drives the support turntable 19 to rotate synchronously, thereby driving the two flushing bends 23, several flushing intermediate pipes 24 and cleaning scraper 26 connected to the support turntable 19 to make circular motion along the inner circumferential wall of the sight glass tube 3.

[0108] On the other hand, the flushing supply pump 16 starts and delivers the flushing medium through the flushing supply pipe 21 to the three-way pipe joint 22. After being split, it enters the two flushing bends 23 and sprays high-pressure flushing medium onto the inner wall of the sight glass barrel 3 through the pressurized flushing nozzle 25 on the flushing intermediate pipe 24 to impact and peel off the attached impurities and scale.

[0109] At the same time, the cleaning scraper 26, which rotates synchronously with the flushing bend 23, mechanically scrapes against the inner wall of the sight glass barrel 3, forming a synergistic cleaning effect with the high-pressure jet and improving flushing efficiency.

[0110] If a stronger flushing effect is required, the intermediate flushing pipe 24 can be replaced with an angled flushing pipe 42. The angled flushing nozzle 43 can be used to change the spray angle of the flushing medium, so that it forms a specific impact angle with the impurities on the inner wall of the sight glass barrel 3. Combined with the rotating flushing action, it can achieve thorough cleaning of stubborn scale.

[0111] During the rinsing process, the pressure stabilizing and filtering module continuously ensures that the rinsing pressure is stable and controllable: the pressure regulating valve 32 on the drain pipe 27 and the return pipe 29 work together to achieve pressure balance regulation through the pressure stabilizing pipe 33, accurately controlling the pressure of the rinsing medium, avoiding damage to the sight glass tube 3 due to excessive pressure or affecting the rinsing effect due to excessively low pressure; the pure medium filtered by the high pressure filter 31 is continuously supplied to the rinsing execution module to ensure that no new impurities adhere to the inner wall of the sight glass tube 3 during the entire rinsing process, ensuring the clarity of observation of the sight glass after rinsing.

[0112] The monitoring and feedback module monitors the system's operating status throughout the process: two monitoring vertical pipes 36 collect the medium pressure in the front connection seat 6 and the diversion box 12 respectively, and the pressure data is transmitted to the pressure gauge 39 through the monitoring horizontal pipe 35, which is convenient for operators to view intuitively; the safety valve 38 is on standby in real time, and automatically opens to release pressure when the pipeline pressure exceeds the preset threshold, ensuring the safe operation of the system.

[0113] The PLC controller 34 is linked to the solenoid valve 41 on the monitoring horizontal pipe 35 via a cable. It automatically adjusts the operating power of the flushing supply pump 16 according to the pressure monitoring data, or triggers the shutdown protection when the pressure is abnormal, so as to ensure the stability and reliability of the flushing process.

[0114] After the rinsing time reaches the preset value of PLC controller 34, the system stops rinsing: the rotary drive motor 17 and the rinsing supply pump 16 stop, the cleaning scraper 26 and the high-pressure jet action stop; the diversion check valve 28 and the return check valve 30 close, and the pressure stabilizing filter module stops working; the system returns to the initial standby state, waiting for the next rinsing cycle to be triggered, while the sight glass 3 remains clear, allowing the operator to continuously observe the flow of the medium.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A high-pressure shielded pump sight glass self-flushing system, characterized in that: It includes a shielded pump sight glass module, a flushing execution module, a pressure stabilizing filter module, and a monitoring and feedback module; The shielded pump sight glass module includes a mounting base plate. The upper surface of the mounting base plate is provided with a front pump cylinder, a sight glass cylinder and a rear pump cylinder in a transverse direction. The sight glass cylinder is a transparent glass cylinder. The flushing execution module includes a flushing supply pump and a rotary drive motor; The open end of the front pump cylinder is fixed with a closed end cover, and a sealing partition is fixed on the inner peripheral wall of the front pump cylinder. The output shaft end of the rotary drive motor passes through the closed end cover and the sealing partition in sequence and is fixed with a support turntable. A flow divider box is fixed to the open end of the rear pump cylinder. The flow divider box is a horizontally extending double-layer cylindrical tube, and a circular partition is fixed on the inner peripheral wall of the flow divider box. A flushing supply pipe is fixedly connected to the transverse side end face of the flushing supply pump. The flushing supply pipe passes through the circular partition and extends into the inner ring space of the diversion box. The end of the flushing supply pipe is rotatably fitted with a three-way pipe connector, and two symmetrical flushing bends are fixed on the three-way pipe connector. The end of each flushing bend is fixed to the side end face of the support turntable. Several intermediate flushing pipes are provided between the two flushing bends. The intermediate flushing pipes are located inside the sight glass tube, and two symmetrical pressurized flushing nozzles are fixed on the intermediate flushing pipes. The intermediate flushing pipe can be replaced with an angled flushing pipe, and two angled flushing nozzles are fixed on the angled flushing pipe; Each of the flushing bends is fixed with a horizontally extending cleaning scraper, which is set close to the inner peripheral wall of the sight glass tube. The pressure stabilizing filter module includes a drain pipe, the initial end of which passes through the outer wall of the distribution box and extends into the internal space of its inner cylinder. A drain stop valve is provided on the drain pipe. The pressure stabilizing filter module also includes a return pipe, the initial end of which is fixedly connected to the flushing supply pipe, and a return check valve is provided on the return pipe; The pressure stabilizing filter module also includes a high-pressure filter, which is fixed to the upper surface of the mounting base plate, and the ends of the drain pipe and the return pipe are respectively fixedly connected to the high-pressure filter; A pressure regulating valve is provided on the outer peripheral wall of the drainage pipe near its end, and a pressure regulating valve is also provided on the outer peripheral wall of the return pipe near its end. The two pressure regulating valves are connected by a pressure stabilizing pipe to achieve linkage and balance adjustment of flushing pressure. The monitoring feedback module includes a PLC controller and a monitoring pipeline assembly connected to the PLC controller. The monitoring pipeline assembly includes a horizontal monitoring pipe, and two vertical monitoring pipes are fixedly connected to the horizontal monitoring pipe. Each of the monitoring horizontal pipes is equipped with a safety valve and a pressure gauge, and each of the monitoring vertical pipes is equipped with a one-way valve. The middle section of the monitoring tube is also equipped with a solenoid valve, which is connected to the PLC controller via a cable.

2. The high-pressure shielded pump sight glass self-flushing system according to claim 1, characterized in that: The mounting base plate is a horizontally arranged square plate, and mounting bolts are provided at the four corners of the mounting base plate; Two sets of support frames are fixed on one side of the upper surface of the mounting base plate, and the front pump cylinder is fixedly clamped on the two sets of support frames.

3. The high-pressure shielded pump sight glass self-flushing system according to claim 1, characterized in that: A front connecting seat is provided between the front pump cylinder and the sight glass cylinder. The lower end of the front connecting seat is fixed to the upper surface of the mounting base plate. The front connecting seat has an opening in the middle. The front pump cylinder and the sight glass cylinder are respectively fixed to the outer end faces on both sides of the opening of the front connecting seat. A rear connecting seat is provided between the sight glass barrel and the rear pump barrel. The lower end of the rear connecting seat is fixed to the upper surface of the mounting base plate. The rear connecting seat has an opening in the middle. The sight glass barrel and the rear pump barrel are respectively fixed to the outer end faces on both sides of the opening of the rear connecting seat.

4. The high-pressure shielded pump sight glass self-flushing system according to claim 1, characterized in that: The front pump cylinder is fixed with a split oil inlet pipe that communicates with it. The split oil inlet pipe extends longitudinally and its end is connected to the main oil and gas transmission pipeline. A diversion return oil pipe is fixed on the rear pump cylinder and communicates with it. The diversion return oil pipe extends longitudinally and its end is also connected to the main oil and gas transmission pipeline.

5. The high-pressure shielded pump sight glass self-flushing system according to claim 1, characterized in that: The flushing supply pump is located on one side of the diversion box, and the rotary drive motor is located on one side of the front pump cylinder. A first support base is fixed to one side of the upper surface of the mounting base plate. The first support base is a U-shaped base with the opening facing downwards. The rotary drive motor is fixed on the first support base. A second support is fixed to the other side of the upper surface of the mounting base plate. The second support is a U-shaped seat with the opening facing downwards, and the flushing supply pump is fixed on the second support.

6. The high-pressure shielded pump sight glass self-flushing system according to claim 1, characterized in that: The diversion box has several observation ports on its transverse outer end face. The observation ports are arranged symmetrically in the center, and a glass window is fixed in each observation port. An overflow connection port is provided on the inner wall of the inner ring of the distribution box.

7. The high-pressure shielded pump sight glass self-flushing system according to claim 3, characterized in that: The lower end of one of the monitoring vertical tubes is fixed to the front connecting seat and extends to its inner circumferential wall, while the lower end of the other monitoring vertical tube is fixed to the diversion box and extends to its outer inner wall.

8. A flushing method for a high-pressure shielded pump sight glass self-flushing system according to any one of claims 1-7, characterized in that: When the preset rinsing cycle is reached or a manual start signal is received, the PLC controller triggers the rinsing program. First, open the diversion stop valve and the return stop valve to allow the diversion medium from the main oil and gas pipeline to flow into the pressure stabilizing and filtration module. After filtration and pressure stabilization, it is used as the flushing medium. Second, start the flushing supply pump and the rotary drive motor to perform rotary spraying and scraping. Meanwhile, the pipeline pressure is monitored in real time by a pressure gauge, and the PLC controller adjusts the flushing supply pump power or the opening of the pressure regulating valve based on the pressure feedback. After the preset rinsing time is reached, each actuator is shut down in sequence, and the system returns to standby mode.

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