A safe and unblocking device for preventing blockage of a styrene-acrylic emulsion conveying pipeline

Abstract

The utility model discloses a kind of styrene-acrylic emulsion conveying pipeline anti-blocking safe dredging devices, belong to styrene-acrylic emulsion production equipment field, including conveying main pipe and control mechanism, conveying main pipe two ends are respectively equipped with feed flange and discharge flange, first pressure sensor for detecting liquid inlet end pressure, dredging interface and second pressure sensor for detecting liquid outlet end pressure are arranged on the conveying main pipe, heating assembly for heating the styrene-acrylic emulsion conveyed in conveying main pipe is arranged on the outer wall of the conveying main pipe, the dredging assembly in the utility model real-time monitoring pressure in conveying main pipe by first pressure sensor and second pressure sensor, once blocked can be triggered automatically dredging fast, avoid jamming diffusion, can discover and handle in time in the early stage of jamming, extinguish problem in sprouting state, change passive repair for active maintenance, without shutdown dismounting pipe, realize on-line operation without stop production, greatly improve production efficiency and continuity.

Description

Technical Field

[0001] This utility model relates to the technical field of styrene-acrylic emulsion production equipment, and in particular to a safety unblocking device for styrene-acrylic emulsion conveying pipelines. Background Technology

[0002] Styrene-acrylic emulsions have high adhesion and water resistance, and are widely used in coatings, adhesives, and other fields. During the production of styrene-acrylic emulsions, the emulsion needs to be transferred through pipelines. However, styrene-acrylic emulsions are prone to viscosity increase and localized solidification in low-temperature environments or under static conditions, leading to blockages in the pipelines.

[0003] Existing traditional solutions mostly involve manually disassembling and cleaning the pipes, which requires interrupting production and disassembling parts of the pipeline. This is not only time-consuming and labor-intensive, but also prone to causing emulsion leakage during the disassembly process, posing a safety hazard. Furthermore, cleaning after a blockage occurs requires stopping the machine, which seriously affects the continuity of production, reduces production efficiency, and is inconvenient to operate with high safety risks. Utility Model Content

[0004] The purpose of this utility model is to solve the problems of time-consuming, labor-intensive, inefficient, and unsafe cleaning of existing styrene-acrylic emulsion conveying pipelines, and to propose a safe unblocking device for styrene-acrylic emulsion conveying pipelines.

[0005] To achieve the above objectives, this utility model employs the following technology: a safety unblocking device for a styrene-acrylic emulsion conveying pipeline, comprising a conveying main pipe and a control mechanism. The conveying main pipe is provided with an inlet flange and an outlet flange at both ends. The conveying main pipe is provided with a first pressure sensor for detecting the pressure at the inlet end, an unblocking interface, and a second pressure sensor for detecting the pressure at the outlet end. The outer wall of the conveying main pipe is provided with a heating component for heating the styrene-acrylic emulsion conveyed in the conveying main pipe. The end of the conveying main pipe near the inlet flange is provided with an unblocking component for unblocking the styrene-acrylic emulsion in the conveying main pipe.

[0006] As a further description of the above technical solution: the unblocking component includes a base, a styrene-acrylic emulsion storage tank is provided on the top of the base, a high-pressure pump is fixedly installed on the top side of the base near the top of the styrene-acrylic emulsion storage tank, an inlet pipe is fixedly connected to the input end of the high-pressure pump, a main pipe is fixedly connected to the output end of the high-pressure pump, a return valve is fixedly connected to one end of the main pipe, and the top end of a first branch pipe extends through the top side of the styrene-acrylic emulsion storage tank into the interior, a second branch pipe is fixedly connected to the other end of the main pipe, and an unblocking nozzle is fixedly connected to the other end of the second branch pipe.

[0007] As a further description of the above technical solution: a reflux valve is provided on the first branch pipe, a solenoid valve is provided on the second branch pipe, and one end of the second branch pipe extends through the dredging interface into the inside of the main conveying pipe.

[0008] As a further description of the above technical solution: the unblocking nozzle is a fan-shaped spray nozzle with a spray angle of 60-90°, and the spray direction of the unblocking nozzle is towards the material flow direction in the conveying main pipe.

[0009] As a further description of the above technical solution: the heating component includes a heat insulation cover sleeved on the conveying main pipe and an electric heating wire wound around the outer wall of the conveying main pipe.

[0010] As a further description of the above technical solution: the control mechanism includes a control box installed on the wall near the unblocking component, and the control box is equipped with a controller.

[0011] As a further description of the above technical solution: the controller is a PLC controller, and is electrically connected to the first pressure sensor, the second pressure sensor, the high-pressure pump, the reflux valve, the solenoid valve and the temperature sensor.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. The unblocking component in this utility model monitors the pressure inside the main conveying pipe in real time through a first pressure sensor and a second pressure sensor. Once a blockage occurs, it can quickly trigger automatic unblocking. The unblocking nozzle is set inside the main conveying pipe and the spray direction is consistent with the material flow direction. With the styrene-acrylic emulsion pressurized by the high-pressure pump, it can accurately impact the blockage point and prevent the blockage from spreading. By using styrene-acrylic emulsion as the high-pressure flushing medium, it has good compatibility with the emulsion inside the conveying pipe and will not cause corrosion of the inner wall of the pipe due to solvent or water flushing. It also avoids foreign impurities from contaminating the emulsion, ensuring product quality and pipe service life. It can detect and deal with blockages in the early stage, eliminating problems in their infancy. It transforms passive repair into proactive maintenance, eliminating the need to stop the machine and dismantle the pipe, realizing online operation without stopping production, greatly improving production efficiency and continuity. Through automated operation, it avoids direct contact between personnel and hazardous chemicals and high-pressure environments, reducing safety risks.

[0013] 2. This utility model controls the heating wire inside the heat preservation cover to generate heat, so that the temperature inside the conveying main pipe is stably maintained at 30-40℃. This temperature range can effectively inhibit the increase of emulsion viscosity, avoid blockage causes from the physical characteristics level, reduce blockage causes from the source, significantly reduce the frequency of pipeline blockage, and ensure production continuity. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure according to an embodiment of the present utility model is shown; Figure 2 A schematic diagram of a dredging component provided according to an embodiment of the present utility model is shown; Figure 3A schematic diagram of the control mechanism according to an embodiment of the present utility model is shown; Figure 4 This diagram shows a cross-sectional internal view of the conveying main pipe and the heat insulation cover according to an embodiment of the present invention; Figure 5 It shows Figure 4 Enlarged view of point A in the middle.

[0015] Legend: 1. Conveying main pipe; 2. Inlet flange; 3. Outlet flange; 4. Unclogging assembly; 41. Base; 42. Styrene-acrylic emulsion storage tank; 43. High-pressure pump; 44. Main pipeline; 45. Return valve; 46. First branch pipe; 47. Solenoid valve; 48. Second branch pipe; 49. Unclogging nozzle; 410. Liquid inlet pipe; 5. Control mechanism; 51. Control box; 52. Controller; 6. Insulation cover; 7. Electric heating wire; 8. First pressure sensor; 9. Second pressure sensor; 10. Temperature sensor; 11. Unclogging interface. Detailed Implementation

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

[0017] Reference Figures 1-5 This embodiment provides a styrene-acrylic emulsion conveying pipeline anti-blockage safety unblocking device, including a conveying main pipe 1 and a control mechanism 5. The control mechanism 5 includes a control box 51 installed on the wall near the unblocking component 4. The control box 51 is equipped with a controller 52, which is a PLC controller and is electrically connected to a first pressure sensor 8, a second pressure sensor 9, a high-pressure pump 43, a return valve 45, a solenoid valve 47 and a temperature sensor 10. The conveying main pipe 1 is provided with an inlet flange 2 and an outlet flange 3 at both ends. The conveying main pipe 1 is provided with a first pressure sensor 8 for detecting the pressure at the inlet end, an unblocking interface 11 and a second pressure sensor 9 for detecting the pressure at the outlet end. The outer wall of the conveying main pipe 1 is provided with a heating component for heating the styrene-acrylic emulsion conveyed in the conveying main pipe 1. The heating component includes a heat insulation cover 6 sleeved on the conveying main pipe 1 and an electric heating wire 7 wound around the outer wall of the conveying main pipe 1. The end of the conveying main pipe 1 near the inlet flange 2 is provided with an unblocking component 4 for unblocking the styrene-acrylic emulsion in the conveying main pipe 1. The unblocking component 4 includes a base 41, with a styrene-acrylic emulsion storage tank 42 mounted on top of the base 41. A high-pressure pump 43 is fixedly installed on the side of the base 41 near the top of the styrene-acrylic emulsion storage tank 42. An inlet pipe 410 is fixedly connected to the input end of the high-pressure pump 43, and a main pipe 44 is fixedly connected to the output end of the high-pressure pump 43. A return valve 45 is fixedly connected to one end of the main pipe 44, and the top end of a first branch pipe 46 extends through the top side of the styrene-acrylic emulsion storage tank 42 into the interior. A return valve 45 is installed on the first branch pipe 46. A second branch pipe 48 is fixedly connected to the other end of the main pipe 44. A solenoid valve 47 is installed on the second branch pipe 48. One end of the second branch pipe 48 extends through the unblocking interface 11 into the interior of the conveying main pipe 1, and the other end of the second branch pipe 48 is fixedly connected to an unblocking nozzle 49. The unblocking nozzle 49 is a fan-shaped spray nozzle with a spray angle of 60-90°, and the spray direction of the unblocking nozzle 49 is towards the material flow direction inside the conveying main pipe 1.

[0018] Specifically, the temperature sensor 10 can be a PT100 resistance temperature detector (RTD). Both the first pressure sensor 8 and the second pressure sensor 9 are diaphragm-type pressure sensors, directly mounted on the main conveying pipe 1 via a flange or threaded joint. Their pressure measurement range is 0~1.0 MPa, and the model can be Rosemount. In the 1199 series, the first pressure sensor 8 is installed upstream to measure the pressure before blockage, P1, and the second pressure sensor 9 is installed downstream to measure the pressure after blockage, P2. The first pressure sensor 8 and the second pressure sensor 9 continuously detect the pressure values ​​P1 and P2 upstream and downstream of the conveying main pipe 1 and transmit the real-time signals to the controller 52. The controller 52 controls the heating wire 7 inside the insulation cover 6 to heat up, so that the temperature inside the conveying main pipe 1 is stably maintained at 30-40℃. This temperature range can effectively inhibit the increase of emulsion viscosity and avoid blockage causes from the physical characteristics level. The temperature is monitored in real time by the temperature sensor 10. At the same time, the insulation cover 6 wraps the outer wall of the conveying main pipe 1 to reduce heat loss inside the pipe and ensure the continuity of temperature control. By maintaining a constant temperature, the risk of blockage caused by low temperature is eliminated from the source, and the material temperature is maintained within the preset safe range. The controller 52 controls the real-time calculation of this pressure difference: ΔP = P1 - P2. When the styrene-acrylic emulsion flows normally in the conveying main pipe 1, ΔP is a stable and relatively small value, which is only the normal flow resistance. When blockage begins to form in the main delivery pipe 1, the flow path is obstructed, causing the pressure P1 to rise and the pressure P2 to fall. The controller 52 detects that the calculated ΔP continuously exceeds the preset safety threshold, for example, ΔP_set = 0.15 MPa, and can set the over-limit duration, such as 5 seconds, to prevent false alarms. The controller 52 determines it as "minor blockage," immediately issues a warning signal, and automatically starts the unblocking procedure. The controller 52 first turns on the high-pressure pump 43 and opens the return valve 45. The styrene-acrylic emulsion circulates in the loop of "high-pressure pump 43 → return valve 45 → styrene-acrylic emulsion storage tank 42." The high-pressure pump 43 begins to build up and stabilize at the preset high-pressure working state, for example, 0.8 MPa. This step ensures that the pressure reaches its maximum value instantaneously during injection. After the pressure stabilizes, it usually lasts for 10-30 seconds. The return valve 45 can be a regulating valve. By adjusting the opening of the return valve 45, the total pressure at the pump outlet can be precisely controlled, thereby indirectly controlling the flow. The pressure applied to the unblocking nozzle 49 is adjusted to accommodate blockages of varying severity. The controller 52 closes the return valve 45 and instantly opens the solenoid valve 47. The styrene-acrylic emulsion loses its return path and immediately ejects from the unblocking nozzle 49 at extremely high speed through the second branch pipe 48. The nozzle direction is downstream, and the jet directly impacts, shears, and dissolves the blockage. The high-pressure jet continues for a preset time, such as 10-20 seconds, or dynamically determined by the controller 52 based on the decrease in ΔP. During and after the spraying process, the controller 52 controls the first pressure sensor 8 and the second pressure sensor 9 to continuously monitor P1 and P2 and calculate the new ΔP. If ΔP decreases and returns to within the normal reference range, such as <0.05 MPa, the unblocking is considered successful. The controller 52 closes the solenoid valve 47, cutting off the high-pressure unblocking styrene-acrylic emulsion, opens the return valve 45 to provide a pressure relief circuit for the high-pressure pump 43, stops the high-pressure pump 43, and the device returns to standby monitoring mode, awaiting the next instruction. This achieves uninterrupted online operation, greatly improving production efficiency and continuity.

[0019] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A safety unblocking device for styrene-acrylic emulsion conveying pipelines, characterized in that, It includes a conveying main pipe (1) and a control mechanism (5). The conveying main pipe (1) is provided with a feed flange (2) and a discharge flange (3) at both ends. The conveying main pipe (1) is provided with a first pressure sensor (8) for detecting the pressure at the inlet end, a dredging interface (11) and a second pressure sensor (9) for detecting the pressure at the outlet end. The outer wall of the conveying main pipe (1) is provided with a heating component for heating the styrene-acrylic emulsion conveyed in the conveying main pipe (1). The end of the conveying main pipe (1) near the feed flange (2) is provided with a dredging component (4) for dredging the styrene-acrylic emulsion in the conveying main pipe (1).

2. The anti-clogging and safe unblocking device for styrene-acrylic emulsion conveying pipelines according to claim 1, characterized in that, The unblocking component (4) includes a base (41), a styrene-acrylic emulsion storage tank (42) is provided on the top of the base (41), a high-pressure pump (43) is fixedly installed on the top side of the base (41) near the top of the styrene-acrylic emulsion storage tank (42), an inlet pipe (410) is fixedly connected to the input end of the high-pressure pump (43), a main pipe (44) is fixedly connected to the output end of the high-pressure pump (43), a return valve (45) is fixedly connected to one end of the main pipe (44), and the top end of the first branch pipe (46) extends through the top side of the styrene-acrylic emulsion storage tank (42) to the inside, and a second branch pipe (48) is fixedly connected to the other end of the main pipe (44), and an unblocking nozzle (49) is fixedly connected to the other end of the second branch pipe (48).

3. The anti-clogging and safe unblocking device for styrene-acrylic emulsion conveying pipelines according to claim 2, characterized in that, A return valve (45) is provided on the first branch pipe (46), and a solenoid valve (47) is provided on the second branch pipe (48). One end of the second branch pipe (48) extends through the dredging interface (11) into the inside of the conveying main pipe (1).

4. The anti-clogging and safe unblocking device for styrene-acrylic emulsion conveying pipelines according to claim 2, characterized in that, The unblocking nozzle (49) is a fan-shaped spray nozzle with a spray angle of 60-90°, and the spray direction of the unblocking nozzle (49) is towards the material flow direction in the conveying main pipe (1).

5. The anti-clogging and safe unblocking device for styrene-acrylic emulsion conveying pipelines according to claim 1, characterized in that, The heating assembly includes a heat insulation cover (6) fitted on the conveying main pipe (1) and an electric heating wire (7) wrapped around the outer wall of the conveying main pipe (1).

6. The anti-clogging and safe unblocking device for styrene-acrylic emulsion conveying pipelines according to claim 1, characterized in that, The control mechanism (5) includes a control box (51) installed on the wall near the unblocking component (4), and a controller (52) is provided inside the control box (51).

7. The anti-clogging and safe unblocking device for styrene-acrylic emulsion conveying pipelines according to claim 6, characterized in that, The controller (52) is a PLC controller and is electrically connected to the first pressure sensor (8), the second pressure sensor (9), the high-pressure pump (43), the reflux valve (45), the solenoid valve (47), and the temperature sensor (10).

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