Filter with blockage degree detection function for preparing boiling point heavy aromatics

Abstract

The invention discloses a filter with a blocking degree detection function for preparation of boiling-point heavy aromatics, which belongs to the technical field of preparation of boiling-point heavy aromatics and comprises a filter box, a liquid inlet formed in the side edge of the filter box, a liquid outlet formed in the bottom of the filter box and a box cover mounted at the top end of the filter box. The spiral bimetallic strip is arranged in the cylindrical filter element, the bottom end of the bimetallic strip is fixed on the positioning column, and the top movable end of the spiral bimetallic strip is connected with the first sliding rod, so that when impurities are gradually accumulated to cause blockage, the resistance of fluid passing through the cylindrical filter element is increased, and the spiral bimetallic strip is deformed and extended by generated friction heat; the first sliding rod is controlled to extend, the height of the indicating plate in the adjusting bin is increased, the end of the indicating plate points to different indicating marks, the plugging degree is prompted, a pure mechanical structure is adopted, electromagnetic interference is effectively avoided, the risk of electric sparks is thoroughly eradicated, and the use safety is improved.

Description

Technical Field

[0001] The invention relates to a filter, in particular to a filter with a blockage degree detection function for preparing boiling point heavy aromatic hydrocarbons, and belongs to the technical field of preparing boiling point heavy aromatic hydrocarbons. Background Art

[0002] In the preparation process of boiling point heavy aromatics, the raw materials of heavy aromatics (such as catalytic reforming oil, pyrolysis gasoline, etc.) may contain mechanical impurities (such as mud, metal debris), colloids or asphaltene and other solid particles. In order to ensure the quality of production, metal mesh or fiber filter bags with a precision of 10-50μm are often used for filtration.

[0003] During use, current filters are equipped with pressure gauges at both ends of the filter's inlet and outlet, and the degree of filter blockage is determined by pressure differential monitoring. However, traditional sensors are susceptible to electromagnetic interference (such as motors and transformers in cracking units) and vibration (pipeline pulsation), leading to false alarms. They also require regular calibration (such as calibration of differential pressure sensors every six months) and battery replacement (wireless sensors), resulting in high maintenance costs. At the same time, circuit failures (such as short circuits) in traditional sensors during cracked gasoline filtration may cause explosions, posing certain safety risks. In addition, during use, the filter cannot automatically stabilize the voltage and clear the blockage without the aid of electricity, reducing its functionality.

[0004] Therefore, a filter with a blockage degree detection function for preparing boiling point heavy aromatic hydrocarbons is designed to optimize the above-mentioned problem. Summary of the Invention

[0005] The main purpose of the present invention is to provide a filter with a blockage degree detection function for the preparation of boiling point heavy aromatic hydrocarbons. A spiral bimetallic strip is provided inside the cylindrical filter element, and the bottom end of the bimetallic strip is fixed on the positioning column. The top movable end of the spiral bimetallic strip is connected to the first slide rod. When impurities gradually accumulate and cause blockage, the resistance of the fluid passing through the cylindrical filter element increases, and the friction heat generated causes the spiral bimetallic strip to deform and elongate, thereby controlling the elongation of the first slide rod and raising the height of the indicator plate inside the adjustment chamber. The end of the indicator plate is pointed to different indicator marks to indicate the degree of blockage. The use of a purely mechanical structure effectively avoids electromagnetic interference and completely eliminates the risk of electric sparks, thereby improving the safety of use. A diversion mechanism consisting of a guide groove, a transfer chamber, a through groove, and a sheet filter element is provided on the box cover, and then combined with a compression spring, a piston, a plug rod, and an annular The sealing release assembly composed of a slot, a sliding hole, a block, and a return spring is used, so that when the cylindrical filter element is seriously clogged, as the first sliding rod rises, the sealing release assembly can be controlled in conjunction to release the blocking state of the guide groove, changing the flow direction of the liquid. The liquid is filtered from the inside of the guide mechanism and then discharged, effectively reducing the pressure difference inside the filter box, protecting the device, and being more practical. By arranging a rotating assembly composed of a first shaft rod, an impeller, a toothed disk, a first gear, a second shaft rod, a second gear, and a gear ring on the box cover, the impact of the water flow is used as a power source to control the rotation of the impeller when the cylindrical filter element is blocked and the pressure is relieved, and then the scraper assembly is controlled through the transmission between the gears to automatically clean the cylindrical filter element, thereby improving the functionality of the device. No electricity is required to drive it, and it is safer to use.

[0006] The purpose of the present invention can be achieved by adopting the following technical solutions: A filter for preparing boiling point heavy aromatic hydrocarbons with a blockage detection function, comprising a filter box, a liquid inlet provided on the side of the filter box, a liquid discharge port provided at the bottom of the filter box, a box cover mounted on the top of the filter box, a pressure ring mounted at the middle position of the bottom end of the box cover, and a cylindrical filter element between the pressure ring and the bottom end of the filter box; A positioning column is fixed to the inner top of the discharge port, and a spiral bimetallic strip is fixedly installed on the top of the positioning column. The spiral bimetallic strip is fitted to the inner side of the cylindrical filter element, and a first sliding rod is vertically installed on the top of the spiral bimetallic strip. An adjusting chamber is provided at the middle position of the bottom inner portion of the box cover, and the top of the first sliding rod slides and extends to the interior of the adjusting chamber. A through-hole communicating with the outer side of the box cover is provided on the side of the adjusting chamber, and an indicator plate is vertically slidably provided inside the through-hole, and the bottom of the indicator plate is fitted with the top of the first sliding rod. A vertical rod for vertically limiting the indicator plate is provided inside the adjusting chamber, and a transparent window is provided at the outer end of the through-hole, and an indicator mark is provided on the side of the transparent window, and an attraction mark is provided on the outer side of the box cover; The inside of the box cover is provided with a pressure relief and flow guiding mechanism which connects the inside and outside of the cylindrical filter element; A cleaning mechanism is provided on the outside of the cylindrical filter element.

[0007] Preferably: the pressure relief and diversion mechanism includes a guide groove, a sealing and releasing component, a transfer bin, a through groove and a sheet filter element. The bottom end of the box cover is evenly provided with guide grooves in a ring array, and the bottom end of the guide groove is provided with a sealing and releasing component. A transfer bin connected to the inside of the guide groove is provided at the middle position inside the box cover, and through grooves connected to the inside of the filter box are evenly provided at the bottom of the transfer bin, and sheet filter elements are horizontally installed inside the through grooves.

[0008] Preferably: the blocking release assembly includes a compression spring, a piston, a plug rod, an annular slot, a sliding hole, a stopper and a return spring, the compression spring is installed on the inner top end of the guide groove, the bottom end of the compression spring is fixedly installed with a piston, the piston and the compression spring are vertically slidably connected, the plug rod is horizontally slidably arranged between the guide groove and the through groove, the side of the piston is provided with an annular slot that cooperates with the plug rod, the diameter of the top end of the first slide rod is larger than the diameter of the bottom end, and the connection between the upper and lower ends of the first slide rod is arc-shaped, the end of the plug rod is fitted with the side of the top end of the first slide rod, the sliding hole is opened in the interior of the box cover along the length direction of the plug rod, the box cover passes through the interior of the sliding hole, and the interior of the sliding hole is provided with a stopper for sliding along the length direction, the stopper is fixed on the plug rod, and a return spring is provided between the side of the stopper close to the piston and the end of the sliding hole.

[0009] Preferably, the diameter of the end of the insertion rod is smaller than the height of the annular slot, and the top and bottom of the annular slot are both flat.

[0010] Preferably, the cleaning mechanism includes a scraper assembly and a rotating assembly. The scraper assembly is circumferentially slidably provided on the outer side of the cylindrical filter element, and the rotating assembly for controlling the rotation of the scraper assembly is provided at the bottom end of the box cover.

[0011] Preferably: the rotating assembly includes a first shaft, an impeller, a toothed disc, a first gear, a second shaft, a second gear and a gear ring, the first shaft is vertically rotatably installed at the middle position of the transfer bin, the first shaft is located inside the transfer bin and the impeller is horizontally installed, the top of the first shaft extends to the inner top of the box cover, the top of the first shaft is installed with a toothed disc, the outer side of the toothed disc is evenly meshed with the first gear, the bottom end of the first gear is installed with the second shaft, the second shaft is rotatably connected to the box cover, the bottom end of the second shaft is installed with the second gear, the outer side of the pressure ring is circumferentially rotatably installed with a toothed ring meshing with the second gear, and the scraper assembly is installed at the bottom of the second gear.

[0012] Preferably: the scraper assembly includes a second slide rod, a scraper, a cross bar and an extrusion spring, the second slide rod is installed at the bottom of the second gear, the scraper is tilted and fits the outer side of the cylindrical filter element, an extrusion spring is arranged between the scraper and the second slide rod, and a cross bar is slidably arranged on the second slide rod, the cross bar passes through the inside of the extrusion spring and is fixedly connected to the scraper.

[0013] Preferably: a guide hole is evenly and vertically opened at the bottom end of the gear ring, the second slide rod is vertically slidably arranged inside the guide hole, a slider is fixed on the side of the second slide rod, a corrugated guide groove is opened circumferentially on the outer side of the pressure ring, and the slider is slidably arranged inside the corrugated guide groove.

[0014] Preferably: a circular groove is provided at the inner bottom of the transfer bin, the bottom end of the circular groove and the top end of the sheet filter element are located at the same horizontal plane, a second waste groove is provided on the outside of the circular groove, a second row of waste ports connected to the outside of the box cover are provided on the outside of the second waste groove, a sweeping plate is fixed to the bottom end of the first shaft, and the sweeping plate is attached to the top of the sheet filter element.

[0015] Preferably, a first waste trough is provided at the inner bottom of the filter box along the circumferential direction, and a first row of waste ports communicating with the outside of the filter box is provided at the side of the first waste trough.

[0016] The beneficial effects of the present invention are: The present invention provides a filter with a blockage detection function for preparing boiling-point heavy aromatic hydrocarbons. The filter comprises a spiral bimetallic strip disposed inside a cylindrical filter element, the bottom end of the bimetallic strip being fixed to a positioning post, and the top movable end of the spiral bimetallic strip being connected to a first slide rod. When impurities gradually accumulate and cause blockage, the resistance of the fluid passing through the cylindrical filter element increases, and the frictional heat generated causes the spiral bimetallic strip to deform and elongate, thereby controlling the elongation of the first slide rod and raising the height of an indicator plate inside an adjustment chamber. The end of the indicator plate is directed to different indicator marks to indicate the blockage degree. The purely mechanical structure effectively avoids electromagnetic interference and completely eliminates the risk of electric sparks, thereby improving safety in use. By providing a guide mechanism consisting of a guide groove, a transfer bin, a through groove, and a sheet filter element on the box cover, and using it in conjunction with a blocking release component consisting of a compression spring, a piston, a plug rod, an annular slot, a sliding hole, a block, and a return spring, when the cylindrical filter element is seriously clogged, as the first slide rod rises, the blocking release component can be linked to control the blocking state of the guide groove to change the flow direction of the liquid. The liquid is filtered inside the guide mechanism and then discharged, which effectively reduces the pressure difference inside the filter box, protects the device, and is more practical. By arranging a rotating assembly consisting of a first shaft, an impeller, a gear plate, a first gear, a second shaft, a second gear, and a gear ring on the box cover, the impact of the water flow can be used as a power source to control the rotation of the impeller when the cylindrical filter element is blocked and the pressure is relieved. The scraper assembly is then controlled through transmission between the gears to automatically clean the cylindrical filter element, thereby improving the functionality of the device. No electricity is required to drive it, and it is safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A front cross-sectional view of a preferred embodiment of a filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to the present invention; Figure 2 This is a cross-sectional view of the interior of a case cover of a preferred embodiment of a filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to the present invention; Figure 3 A front view of a preferred embodiment of a filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to the present invention; Figure 4 A preferred embodiment of a filter with a blockage detection device for preparing boiling point heavy aromatic hydrocarbons according to the present invention Figure 1 Enlarged view of point A in the middle; Figure 5 A preferred embodiment of a filter with a blockage detection device for preparing boiling point heavy aromatic hydrocarbons according to the present invention Figure 2 Enlarged view of point B in the middle; Figure 6 A preferred embodiment of a filter with a blockage detection device for preparing boiling point heavy aromatic hydrocarbons according to the present invention Figure 2 Enlarged view of point C in the middle; Figure 7 This is a front structural diagram of a pressure ring in a preferred embodiment of a filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to the present invention; Figure 8 A diagram of a scraper assembly of a preferred embodiment of a filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to the present invention; Figure 9 The present invention is a top sectional view of a box cover of a preferred embodiment of a filter with a blockage degree detection function for preparing boiling point heavy aromatic hydrocarbons.

[0018] In the figure: 1, filter box; 101, liquid inlet; 102, liquid outlet; 103, box cover; 104, pressure ring; 105, cylindrical filter element; 2. Positioning column; 3. Spiral bimetallic strip; 4. First slide rod; 5. Adjustment chamber; 6. Through port; 7. Indicator plate; 8. Vertical rod; 9. Indicator mark; 10. Transparent window; 11. Attraction mark; 12. Diversion groove; 13. Blocking and releasing assembly; 1301. Compression spring; 1302. Piston; 1303. Insert rod; 1304. Annular slot; 1305. Sliding hole; 1306. Stopper; 1307. Return spring; 14. Transfer bin; 15. Through slot; 16. Sheet filter element; 17. Scraper assembly; 1701. Second slide rod; 1702. Scraper; 1703. Crossbar; 1704. Extrusion spring; 1705. Guide hole; 1706. Corrugated guide groove; 1707. Slider; 18. Rotating assembly; 1801. First shaft; 1802. Impeller; 1803. Toothed disc; 1804. First gear; 1805. Second shaft; 1806. Second gear; 1807. Ring gear; 19. First waste chute; 20. First row of waste outlets; 21. Circular trough; 22. Second waste chute; 23. Sweep plate; 24. Second row of waste outlets. DETAILED DESCRIPTION

[0019] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is described in further detail below with reference to embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0020] like Figures 1-9 As shown, this embodiment provides a filter with a blockage detection function for preparing boiling-point heavy aromatic hydrocarbons, comprising a filter box 1, a liquid inlet 101 provided on the side of the filter box 1, a liquid outlet 102 provided on the bottom of the filter box 1, a box cover 103 installed on the top of the filter box 1, a pressure ring 104 installed at the middle position of the bottom end of the box cover 103, and a cylindrical filter element 105 between the pressure ring 104 and the bottom end of the filter box 1; A positioning column 2 is fixed to the inner top of the discharge port 102, and a spiral bimetallic strip 3 is fixedly installed on the top of the positioning column 2. The spiral bimetallic strip 3 is fitted on the inner side of the cylindrical filter element 105, and a first slide rod 4 is vertically installed on the top of the spiral bimetallic strip 3. An adjusting chamber 5 is provided at the middle position of the bottom of the box cover 103, and the top of the first slide rod 4 slides and extends to the inside of the adjusting chamber 5. A through-hole 6 communicating with the outside of the box cover 103 is provided on the side of the adjusting chamber 5. An indicator plate 7 is vertically slidably provided inside the through-hole 6, and the bottom of the indicator plate 7 is fitted with the top of the first slide rod 4. A vertical rod 8 for vertically limiting the indicator plate 7 is provided inside the adjusting chamber 5. A transparent window 10 is provided at the outer end of the through-hole 6, and an indicator mark 9 is provided on the side of the transparent window 10. An attraction mark 11 is provided on the outside of the box cover 103; The interior of the box cover 103 is provided with a pressure relief and flow guiding mechanism for connecting the inside and outside of the cylindrical filter element 105; A cleaning mechanism is provided on the outside of the cylindrical filter element 105 .

[0021] Overall working principle: In the initial state, the indicator plate 7 is attached to the bottom of the regulating chamber 5 and points to the green area at the bottom of the indicator mark 9. The indicator mark 9 is divided into green, yellow and red from top to bottom for distinguishing prompts. The attraction mark 11 is red. In order to attract the attention of personnel, when the filter is filtering catalytic reforming oil and cracked gasoline normally, the pressure difference on both sides of the cylindrical filter element 105 is small, and no large friction heat is generated. The spiral bimetallic strip 3 is in a normal state. However, when impurities gradually accumulate and cause blockage, the resistance of the fluid through the cylindrical filter element 105 increases, and the friction heat generated causes the spiral bimetallic strip 3 to deform and elongate. Assuming that the cracked gasoline flow rate is 100m³ / h, the pressure difference rises from 0.1MPa to 0.5MPa when blocked. According to the law of conservation of energy, the friction The frictional heat is about 11.6kW (calculation formula: Q=ΔP×Qv / efficiency, efficiency is estimated at 80%), the spiral bimetallic strip 3 is in full contact with the surface of the cylindrical filter element 105, and can be heated to the deformation temperature (60°C) in a short time, controlling the first slide rod 4 to move vertically upward, and pushing the indicator plate 7 upward. When the indicator plate 7 points to the red area of the indicator mark 9, it means that the blockage is more serious at this time. At the same time, the pressure relief diversion mechanism is used to transfer the oil from the inside of the box cover 103 to the inside of the cylindrical filter element 105 after filtration, reducing the internal and external pressure difference of the cylindrical filter element 105 and lowering the temperature of the raw materials. In addition, the cleaning mechanism will also clean the outside of the cylindrical filter element 105, remove impurities on the surface, and automatically dredge the cylindrical filter element 105.

[0022] In this embodiment, the pressure relief and diversion mechanism includes a guide groove 12, a blocking and releasing component 13, a transfer bin 14, a through groove 15 and a sheet filter element 16. The bottom end of the box cover 103 is evenly provided with a guide groove 12 in a circular array, and the bottom end of the guide groove 12 is provided with a blocking and releasing component 13. A transfer bin 14 that is connected to the inside of the guide groove 12 is provided at the middle position inside the box cover 103. The bottom of the transfer bin 14 is evenly provided with a through groove 15 that is connected to the inside of the filter box 1. The inside of the through groove 15 is horizontally installed with a sheet filter element 16. The sheet filter element 16 and the cylindrical filter element 105 both use metal mesh or sintered filter element with a filtration accuracy of 10-50μm and a thickness of 5-10mm.

[0023] Local working principle: When the cylindrical filter element 105 is in a serious blocking state, the pressure difference between the inside and outside of the cylindrical filter element 105 is large, and the blocking release component 13 releases the blocking state of the bottom end of the guide groove 12. The oil entering the filter box 1 passes through the guide groove 12 and enters the interior of the transfer bin 14, then flows downward through the through groove 15, and enters the interior of the cylindrical filter element 105 after being filtered by the sheet filter element 16, so as to balance the pressure difference between the inside and outside of the cylindrical filter element 105 and prevent the filter from bursting.

[0024] In this embodiment, the blocking release assembly 13 includes a compression spring 1301, a piston 1302, an insertion rod 1303, an annular slot 1304, a sliding hole 1305, a stopper 1306 and a return spring 1307. The compression spring 1301 is installed at the inner top of the guide groove 12, and the bottom end of the compression spring 1301 is fixedly installed with the piston 1302. The piston 1302 is vertically slidably connected to the compression spring 1301. The insertion rod 1303 is horizontally slidably arranged between the guide groove 12 and the through groove 15. The side of the piston 1302 is provided with an annular slot 1304 that cooperates with the insertion rod 1303. The diameter of the top end of the first slide rod 4 is larger than the diameter of the bottom end, and the connection between the upper and lower ends of the first slide rod 4 is arc-shaped. The end of the insertion rod 1303 is fitted with the side of the top end of the first slide rod 4. The sliding hole 1305 is opened inside the box cover 103 along the length direction of the insertion rod 1303. The box cover 103 passes through the inside of the sliding hole 1305. A stopper 1306 is provided inside the sliding hole 1305 for sliding along the length direction. The stopper 1306 is fixed on the insertion rod 1303. A return spring 1307 is provided between the side of the stopper 1306 close to the piston 1302 and the end of the sliding hole 1305.

[0025] Partial working principle: Under normal filtering state, the top end of the first slide rod 4 blocks one end of the plug rod 1303, and the other end of the plug rod 1303 is located inside the annular slot 1304, which hinders the upward movement of the piston 1302. However, when the cylindrical filter element 105 is in a serious blocking state, the first slide rod 4 moves upward to release the blockage on the end of the plug rod 1303, and the return spring 1307 pushes the plug rod 1303 to slide toward the inside of the regulating chamber 5. The plug rod 1303 is pulled out from the inside of the annular slot 1304, and the pressure of the liquid The piston 1302 is squeezed upward, and the liquid enters the transfer bin 14 through the guide groove 12. After the cylindrical filter element 105 is cleaned, the squeezing force of the liquid on the piston 1302 becomes smaller, and the piston 1302 is reset under the elastic force of the compression spring 1301, and the friction heat generated on the cylindrical filter element 105 is reduced. The spiral bimetallic strip 3 is reset, controlling the downward pressure of the first sliding rod 4 and squeezing the insertion rod 1303. The end of the insertion rod 1303 is inserted into the inside of the annular slot 1304 again to limit the piston 1302 again.

[0026] In this embodiment, the diameter of the end of the insertion rod 1303 is smaller than the height of the annular slot 1304 , and the top and bottom of the annular slot 1304 are both flat.

[0027] Partial working principle: When the insertion rod 1303 is reset, it can be more easily inserted into the inside of the annular slot 1304. When the piston 1302 is subjected to thrust, the insertion rod 1303 can limit it well because the top and bottom are both flat.

[0028] In this embodiment, the cleaning mechanism includes a scraper assembly 17 and a rotating assembly 18. The scraper assembly 17 is circumferentially slidably provided on the outer side of the cylindrical filter element 105, and the rotating assembly 18 for controlling the rotation of the scraper assembly 17 is provided at the bottom end of the box cover 103.

[0029] Partial working principle: When the cylindrical filter element 105 is in a severely blocked state, the rotating assembly 18 will control the scraper assembly 17 to slide along the circumference of the cylindrical filter element 105 to clean the surface of the cylindrical filter element 105.

[0030] In this embodiment, the rotating assembly 18 includes a first shaft 1801, an impeller 1802, a toothed disc 1803, a first gear 1804, a second shaft 1805, a second gear 1806 and a gear ring 1807. The first shaft 1801 is vertically rotatably mounted at the middle position of the transfer bin 14. The first shaft 1801 is located inside the transfer bin 14 and the impeller 1802 is horizontally mounted thereon. The top end of the first shaft 1801 extends to the inner top of the box cover 103. 1 is mounted on the top of the gear disc 1803, the outer side of the gear disc 1803 is evenly meshed with the first gear 1804, the bottom end of each first gear 1804 is mounted with a second shaft 1805, the second shaft 1805 is rotatably connected to the box cover 103, the bottom end of each second shaft 1805 is mounted with a second gear 1806, the outer side of the pressure ring 104 is circumferentially mounted with a gear ring 1807 meshing with the second gear 1806, and the scraper assembly 17 is mounted at the bottom of the second gear 1806.

[0031] Local working principle: When the oil enters the interior of the transfer bin 14 from the guide groove 12, the oil exerts a large thrust on the impeller 1802, which can control the rotation of the first shaft 1801. The first shaft 1801 drives the gear ring 1807 to rotate under the transmission control of the gear, thereby controlling the movement of the scraper assembly 17 at the bottom of the gear ring 1807.

[0032] In this embodiment, the scraper assembly 17 includes a second sliding rod 1701, a scraper 1702, a cross bar 1703 and an extrusion spring 1704. The second sliding rod 1701 is installed at the bottom of the second gear 1806. The scraper 1702 is tilted and fits against the outer side of the cylindrical filter element 105. An extrusion spring 1704 is arranged between the scraper 1702 and the second sliding rod 1701. A cross bar 1703 is slidingly arranged on the second sliding rod 1701. The cross bar 1703 passes through the inside of the extrusion spring 1704 and is fixedly connected to the scraper 1702.

[0033] Local working principle: The scraper 1702 is tightly attached to the outside of the cylindrical filter element 105. The gear ring 1807 controls the movement of the second slide rod 1701 during rotation. The second slide rod 1701 drives the movement of the scraper 1702. The extrusion spring 1704 ensures that the scraper 1702 is always in contact with the outside of the cylindrical filter element 105. The elastic coefficient of the extrusion spring 1704 is 5-10N / mm, and the compression amount is 2-5mm, so that the pressure of the scraper 1702 on the outer wall of the cylindrical filter element 105 is maintained at 0.1-0.3N / cm², which can effectively scrape off impurities without damaging the filter element.

[0034] In this embodiment, a guide hole 1705 is evenly and vertically opened at the bottom end of the gear ring 1807, the second slide rod 1701 is vertically slidably set inside the guide hole 1705, a slider 1707 is fixed on the side of the second slide rod 1701, a corrugated guide groove 1706 is opened circumferentially on the outer side of the pressure ring 104, the slider 1707 is slidably set inside the corrugated guide groove 1706, and the waveform of the corrugated guide groove 1706 is a sine curve.

[0035] Partial working principle: When the gear ring 1807 drives the second slide rod 1701 to move, the slider 1707 slides inside the corrugated guide groove 1706, controlling the second slide rod 1701 to move up and down, and then the scraper 1702 also slides up and down when the cylindrical filter element 105 rotates, thereby improving the cleaning effect.

[0036] In this embodiment, a circular groove 21 is provided at the inner bottom of the transfer bin 14, and the bottom end of the circular groove 21 is located at the same horizontal plane as the top end of the sheet filter element 16. A second waste groove 22 is provided on the outside of the circular groove 21, and a second row of waste ports 24 that are connected to the outside of the box cover 103 are provided on the outside of the second waste groove 22. A sweeping plate 23 is fixed to the bottom end of the first shaft 1801, and the sweeping plate 23 is attached to the top of the sheet filter element 16.

[0037] Partial working principle: When the first shaft 1801 rotates, the sweeping plate 23 will also be driven to rotate. The rotation of the sweeping plate 23 can push the impurities on the top of the sheet filter element 16 into the inside of the second waste trough 22, ensuring the cleanliness of the surface of the sheet filter element 16, and then regularly open the second waste port 24 to clean the waste.

[0038] In this embodiment, a first waste trough 19 is circumferentially formed at the inner bottom of the filter box 1 , and a first waste outlet 20 communicating with the outside of the filter box 1 is formed on a side of the first waste trough 19 .

[0039] Partial working principle: impurities swept from the cylindrical filter element 105 will fall into the interior of the first waste tank 19, and the first waste outlet 20 is opened regularly to discharge the waste.

[0040] The above is only a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which fall within the scope of protection of the present invention.

Claims

1. A filter for preparing boiling point heavy aromatic hydrocarbons with a blockage detection function, comprising a filter box (1), a liquid inlet (101) provided on a side of the filter box (1), a liquid outlet (102) provided on a bottom of the filter box (1), a box cover (103) installed at the top of the filter box (1), a pressure ring (104) installed at a middle position of the bottom end of the box cover (103), and a cylindrical filter element (105) between the pressure ring (104) and the bottom end of the filter box (1); Its characteristics are: A positioning column (2) is fixed to the inner top of the liquid discharge port (102), a spiral bimetallic strip (3) is fixed to the top of the positioning column (2), the spiral bimetallic strip (3) is attached to the inner side of the cylindrical filter element (105), a first slide rod (4) is vertically installed on the top of the spiral bimetallic strip (3), an adjustment chamber (5) is opened at the middle position of the bottom of the box cover (103), the top of the first slide rod (4) slides and extends to the inside of the adjustment chamber (5), and the side of the adjustment chamber (5) is fixed to the top of the positioning column (2). A through opening (6) communicating with the outside of the box cover (103) is provided on the side, an indicator plate (7) is vertically slidably provided inside the through opening (6), the bottom of the indicator plate (7) is in contact with the top of the first slide rod (4), a vertical rod (8) for vertically limiting the indicator plate (7) is provided inside the regulating chamber (5), a transparent window (10) is provided at the outer end of the through opening (6), an indicator mark (9) is provided on the side of the transparent window (10), and an attraction mark (11) is provided on the outer side of the box cover (103); A pressure relief and flow guiding mechanism for connecting the inner and outer sides of the cylindrical filter element (105) is provided inside the box cover (103); A cleaning mechanism is provided on the outside of the cylindrical filter element (105).

2. The filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to claim 1, characterized in that: The pressure relief diversion mechanism comprises a diversion groove (12), a blocking release assembly (13), a transfer chamber (14), a through groove (15) and a sheet filter element (16). The bottom end of the box cover (103) is evenly provided with a diversion groove (12) in a ring array, and the bottom end of each diversion groove (12) is provided with a blocking release assembly (13). A transfer chamber (14) is provided at a middle position inside the box cover (103) and is connected to the inside of the diversion groove (12). The bottom of the transfer chamber (14) is evenly provided with through grooves (15) that are connected to the inside of the filter box (1), and sheet filter elements (16) are horizontally installed inside the through grooves (15).

3. The filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to claim 2, characterized in that: The blocking release assembly (13) includes a compression spring (1301), a piston (1302), an insertion rod (1303), an annular slot (1304), a sliding hole (1305), a stopper (1306) and a return spring (1307). The compression spring (1301) is installed at the inner top of the guide groove (12). The bottom end of the compression spring (1301) is fixedly installed with a piston (1302). The piston (1302) and the compression spring (1301) are vertically slidably connected. The insertion rod (1303) is horizontally slidably arranged between the guide groove (12) and the through groove (15). The side of the piston (1302) is provided with an annular slot (1304) that cooperates with the insertion rod (1303). The diameter of the top end of a slide rod (4) is larger than the diameter of the bottom end, and the connection between the upper and lower ends of the first slide rod (4) is arc-shaped. The end of the insertion rod (1303) is fitted with the side of the top end of the first slide rod (4). The sliding hole (1305) is opened inside the box cover (103) along the length direction of the insertion rod (1303). The box cover (103) passes through the inside of the sliding hole (1305). A stopper (1306) is provided inside the sliding hole (1305) to slide along the length direction. The stopper (1306) is fixed on the insertion rod (1303). A return spring (1307) is provided between the side of the stopper (1306) close to the piston (1302) and the end of the sliding hole (1305).

4. The filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to claim 3, characterized in that: The diameter of the end of the insertion rod (1303) is smaller than the height of the annular slot (1304), and the top and bottom of the annular slot (1304) are both flat.

5. The filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to claim 2, characterized in that: The cleaning mechanism comprises a scraper assembly (17) and a rotating assembly (18); the scraper assembly (17) is slidably provided on the outer side of the cylindrical filter element (105) in the circumferential direction; and the rotating assembly (18) for controlling the rotation of the scraper assembly (17) is provided at the bottom end of the box cover (103).

6. The filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to claim 5, characterized in that: The rotating assembly (18) includes a first shaft (1801), an impeller (1802), a toothed disc (1803), a first gear (1804), a second shaft (1805), a second gear (1806) and a gear ring (1807). The first shaft (1801) is vertically rotatably mounted at the middle position of the transfer bin (14). The first shaft (1801) is located inside the transfer bin (14) and the impeller (1802) is horizontally mounted thereon. The top end of the first shaft (1801) extends to the inner top of the box cover (103). A toothed disc (1803) is installed at the top, a first gear (1804) is evenly meshed on the outer side of the toothed disc (1803), a second shaft (1805) is installed at the bottom end of each of the first gears (1804), the second shaft (1805) is rotatably connected to the box cover (103), a second gear (1806) is installed at the bottom end of each of the second shafts (1805), a toothed ring (1807) meshing with the second gear (1806) is rotatably installed on the outer side of the pressure ring (104), and a scraper assembly (17) is installed at the bottom of the second gear (1806).

7. The filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to claim 6, characterized in that: The scraper assembly (17) includes a second slide rod (1701), a scraper (1702), a cross bar (1703) and an extrusion spring (1704). The second slide rod (1701) is installed at the bottom of the second gear (1806). The scraper (1702) is tilted and fits on the outside of the cylindrical filter element (105). An extrusion spring (1704) is provided between the scraper (1702) and the second slide rod (1701). A cross bar (1703) is slidably provided on the second slide rod (1701). The cross bar (1703) passes through the inside of the extrusion spring (1704) and is fixedly connected to the scraper (1702).

8. The filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to claim 7, characterized in that: A guide hole (1705) is evenly and vertically opened at the bottom end of the gear ring (1807), the second slide rod (1701) is vertically slidably set inside the guide hole (1705), a slider (1707) is fixed on the side of the second slide rod (1701), a corrugated guide groove (1706) is opened circumferentially on the outer side of the pressure ring (104), and the slider (1707) is slidably set inside the corrugated guide groove (1706).

9. The filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to claim 6, characterized in that: A circular groove (21) is provided at the inner bottom of the transfer bin (14), the bottom end of the circular groove (21) and the top end of the sheet filter element (16) are located at the same horizontal plane, a second waste trough (22) is provided on the outer side of the circular groove (21), a second row of waste ports (24) connected to the outer side of the box cover (103) is provided on the outer side of the second waste trough (22), and a sweeping plate (23) is fixed to the bottom end of the first shaft (1801), and the sweeping plate (23) is attached to the top of the sheet filter element (16).

10. The filter with a blockage detection function for preparing boiling point heavy aromatic hydrocarbons according to claim 1, characterized in that: A first waste trough (19) is provided on the inner bottom of the filter box (1) along the circumferential direction, and a first row of waste ports (20) communicating with the outside of the filter box (1) is provided on the side of the first waste trough (19).

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