Novel high-pressure closed filter

Abstract

The invention relates to the technical field of sewage treatment, in particular to a novel high-pressure closed filter which comprises a shell, an end socket is fixedly connected in the shell, a center shaft, a low-pressure filter cartridge and a high-pressure filter cartridge are arranged in the shell, the high-pressure filter cartridge is conical, the large-diameter end of the high-pressure filter cartridge is fixedly connected with the low-pressure filter cartridge, and the large-diameter end of the high-pressure filter cartridge is fixedly connected with the high-pressure filter cartridge. A slag discharge pipe is arranged at the other end of the high-pressure filter cartridge and penetrates through the seal head; two partition plates are arranged in the shell and are detachably connected with the two ends of the low-pressure filter cartridge respectively; and the central shaft is coaxially and fixedly connected with a spiral blade. The device integrates the functions of stock solution filtering, filter cake scraping, filter cake conveying, filter cake dewatering and filter cake discharging, the possibility that the filtering efficiency is reduced due to excessive accumulation of the filter cakes is avoided, and the automation degree of the device is relatively high; the filter cakes are pressurized and dehydrated in the filter cake conveying process, the working efficiency is improved, and the water content of the filter cakes is low, so that follow-up treatment of the filter cakes is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a novel high-pressure closed filter. Background Art

[0002] Wastewater treatment is the process of purifying wastewater to meet the water quality requirements for discharge into a water body or reuse. Wastewater treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, and catering, and is increasingly entering the daily lives of ordinary people.

[0003] Chinese patent publication number CN2410026Y discloses a horizontal closed pressure filter, which includes a cylinder, a cylinder head, a filter element and filter plate, a filter element scraper, a screw conveyor, a slurry feed port, a filter cake discharge port, a filtrate discharge port and a transmission device. A filter plate is installed on both sides and ends of the cylinder and the periphery of the screw conveyor, so that the machine maintains a large filtration area per unit volume and a high filtration intensity, solves the problem of no thin material, and can be operated in a continuous automatic mode or an intermittent mode. It is particularly suitable for operations that require multiple washing of materials, so that the adaptability is enhanced. The filter element adopts a trolley structure and can be pulled out as a whole for maintenance.

[0004] The device scrapes and discharges the filter cake by setting a scraper and a screw conveyor, but the device lacks facilities for dehydrating the filter cake. Excessive water content in the filter cake is not conducive to subsequent treatment of the filter cake, and excessive water content in the filter cake can easily lead to sewage in the filter cake dripping into the outside during the transportation and treatment of the filter cake, thereby causing external environmental pollution. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a new type of high-pressure closed filter to solve the above problems.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A novel high-pressure closed filter comprises an outer shell, a head is fixedly connected to the inner shell, a central axis, a low-pressure filter cartridge and a high-pressure filter cartridge are arranged in the inner shell, the high-pressure filter cartridge is arranged in a cone shape, the end of the high-pressure filter cartridge with a larger diameter is fixedly connected to the low-pressure filter cartridge, the other end of the high-pressure filter cartridge is provided with a slag discharge pipe, and the slag discharge pipe passes through the head; two partitions are arranged in the inner shell, and the two partitions are detachably connected to the two ends of the low-pressure filter cartridge respectively; a spiral blade is coaxially fixedly connected to the inner shell of the central axis, an expansion ring is arranged at the edge of the spiral blade, the central axis is composed of a central tube and a cone, the space between the low-pressure filter cartridge and the central tube matches the shape of the spiral blade of section A, and the outer surface of the expansion ring of section A fits with the inner wall of the low-pressure filter cartridge; the space between the high-pressure filter cartridge and the cone matches the shape of the spiral blade of section B, and the outer surface of the expansion ring of section B fits with the inner wall of the high-pressure filter cartridge; A motor is installed on the outer shell, and the output end of the motor is drivingly connected to the end of the center tube away from the cone. The outer shell is detachably connected to a mounting body, and a conical plug is slidably fitted on the mounting body. A spring transverse driving mechanism is provided on the mounting body, and the spring transverse driving mechanism pushes against the conical plug and is inserted into the slag discharge pipe. A piston mechanism is provided in the center tube, and the conical plug is drivingly connected to the piston mechanism. A flow channel is provided in the spiral blade, and the center tube is connected to the inside of the expansion ring through the flow channel.

[0007] Preferably, the inner diameter of the slag discharge pipe outlet gradually increases in the direction away from the cone, and a plurality of expansion grooves are provided on the conical plug. A split piece is slidably fitted in the expansion groove, and an elastic block is installed between one side of the split piece inserted into the expansion groove and the inner wall of the expansion groove.

[0008] Preferably, an annular slot is provided on the mounting body, a sleeve is fixedly connected to the side of the conical plug away from the slag discharge pipe, the other end of the sleeve is inserted into the annular slot, a first protrusion is fixedly connected to the inner wall of the annular slot, and a first spiral groove matching the first protrusion is provided on the sleeve.

[0009] Preferably, the spring transverse driving mechanism includes a rotating cylinder rotatably connected to the mounting body, and a second protrusion is fixedly connected to the inner wall of the rotating cylinder; a push plate is slidably fitted in the sleeve, and the conical plug is coaxially rotatably connected to the rotating plate on the side close to the push plate, a first spring is installed in the rotating cylinder between the rotating plate and the push plate, and a push rod and a guide rod are fixedly connected to the side of the push plate away from the first spring, a blind hole is provided on the mounting body, the other end of the guide rod is inserted into the blind hole and can slide in the blind hole, the end of the push rod away from the push plate sequentially passes through the mounting body and the rotating cylinder, and a second spiral groove matching the second protrusion is provided on the push rod.

[0010] Preferably, an annular mounting groove is provided in the mounting body, one end of the rotating drum is inserted into the annular mounting groove, a volute spring is installed between the outer surface of the rotating drum and the inner wall of the annular mounting groove, and the rotating drum is provided with a hand wheel.

[0011] Preferably, a ratchet is coaxially fixedly connected to the outer surface of the rotating drum, a slide groove is provided on the mounting body, a guide block is slidably fitted in the slide groove, a one-way limit rod is fixedly connected to the guide block, the bottom end of the one-way limit rod is provided with an inclined surface, and the bottom end of the one-way limit rod is engaged with the tooth groove of the ratchet, and an electric spring is installed between the bottom of the guide block and the inner bottom wall of the slide groove.

[0012] Preferably, the piston mechanism comprises a piston slidingly sealed in a central tube, a second spring is installed in the central tube on the side of the piston away from the cone, an outer tube is coaxially fixedly connected to the piston, and a third protrusion is fixedly connected to the inner wall of the outer tube.

[0013] Preferably, the conical body is coaxially rotatably connected to an inner cylinder, one end of the inner cylinder is inserted into the outer cylinder, and a third spiral groove matching the third protrusion is provided on the outer surface of the inner cylinder; a clearance groove is provided on the conical body, and a stopper is fixedly connected to the inner wall of the clearance groove; a positioning rod is coaxially fixedly connected to the side of the conical plug close to the conical body, the positioning rod passes through the conical body and the clearance groove in sequence and is inserted into the interior of the inner cylinder, a key strip is fixedly connected to the outer surface of the positioning rod, and a key slot matching the key strip is provided on the inner wall of the inner cylinder.

[0014] Preferably, the two partitions and the sealing head divide the space inside the shell into a raw material chamber, a low-pressure filter chamber, a high-pressure filter chamber and a slag chamber.

[0015] Preferably, a feed pipe seat, a raw material pressure measuring pipe seat, a low-pressure clear liquid discharge pipe seat, a clear liquid pressure measuring pipe seat, a high-pressure clear liquid discharge pipe seat and a slag outlet are fixedly connected to the outer shell; the setting positions of the feed pipe seat and the raw material pressure measuring pipe seat match the raw material cavity, the setting positions of the low-pressure clear liquid discharge pipe seat and the clear liquid pressure measuring pipe seat match the low-pressure filter cavity, the setting position of the high-pressure clear liquid discharge pipe seat matches the high-pressure filter cavity, and the slag outlet is located below the slag cavity.

[0016] The beneficial effects of the present invention are: 1. The present invention integrates the functions of raw liquid filtration, filter cake scraping, filter cake transportation, filter cake dehydration and filter cake discharge, thereby avoiding the possibility of reduced filtration efficiency due to excessive accumulation of filter cakes, and the device has a high degree of automation; the present invention pressurizes and dehydrates the filter cake during the filter cake transportation process, thereby improving work efficiency, and the low water content of the filter cake is conducive to the subsequent treatment of the filter cake.

[0017] 2. The present invention can adjust the pressing force of the conical plug inserted into the slag discharge pipe according to needs, and has high practicality. Through the coordinated arrangement of the volute spring, the push rod and the rotating drum, the user can quickly detach the conical plug from the slag discharge pipe, thereby improving the convenience of using the device.

[0018] 3. During the use of the present invention, when the filter cake is discharged from the slag discharge pipe, the filter cake can be divided by setting the dividing piece to avoid the discharged filter cake being a whole piece, which leads to excessive resistance to the filter cake discharge and is not conducive to the filter cake falling into the slag cavity. In addition, if the filter cake is too large, it will easily cause the slag discharge port to be blocked.

[0019] 4. After the use of the present invention, the shrinkage of the expansion ring can reduce the resistance of the spiral blade during rotation, and then the spiral blade rotates at a high speed and throws off the filter cake attached to the surface, thereby achieving the cleaning of the surface of the spiral blade.

[0020] 5. In the initial stage of the movement of the conical plug of the present invention when it is separated from the slag discharge pipe, the conical plug rotates with the dividing piece and scrapes off the filter cake adhered to the outlet of the slag discharge pipe, thereby achieving the purpose of cleaning the slag discharge pipe; after the conical plug is completely separated from the slag discharge pipe, the high-speed rotation of the spiral blade can drive the conical plug to rotate at a high speed, so that the filter cake adhered to the conical plug is thrown off, thereby achieving the cleaning of the surface of the conical plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the installation body of the present invention.

[0023] Figure 3 It is a schematic cross-sectional structural diagram of the mounting body of the present invention.

[0024] Figure 4 It is a schematic cross-sectional structure diagram of the conical plug of the present invention.

[0025] Figure 5 For the present invention Figure 3 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0026] Figure 6 It is a schematic cross-sectional structure diagram of the central axis of the present invention.

[0027] Figure 7 For the present invention Figure 6 Schematic diagram of the structure with a partial enlargement at point B in the middle.

[0028] Figure 8 For the present invention Figure 6 Schematic diagram of the partially enlarged structure at point C in the middle.

[0029] Fig. 9 This is a schematic diagram of the structure of the stopper installation of the present invention.

[0030] In the attached drawings: 1, housing; 2, end cap; 3, low-pressure filter cartridge; 4, high-pressure filter cartridge; 5, partition; 6, raw material chamber; 7, low-pressure filter chamber; 8, high-pressure filter chamber; 9, slag chamber; 10, slag discharge pipe; 11, center tube; 12, cone; 13, spiral blade; 14, expansion ring; 15, motor; 16, cone plug; 17, mounting body; 18, annular slot; 19, sleeve; 20, first protrusion; 21, first spiral groove; 22, rotating drum; 23, push plate; 24, first spring; 25, ejector rod; 26, telescopic groove; 27, Splitting piece; 28. annular mounting groove; 29. ​​scroll spring; 30. hand wheel; 31. ratchet; 32. slide groove; 33. electric spring; 34. piston; 35. second spring; 36. rotating plate; 37. outer cylinder; 38. inner cylinder; 39. clearance groove; 40. positioning rod; 41. stopper; 42. key bar; 43. feed pipe seat; 44. raw material pressure measuring pipe seat; 45. low-pressure clear liquid discharge pipe seat; 46. clear liquid pressure measuring pipe seat; 47. high-pressure clear liquid discharge pipe seat; 48. slag outlet; 49. elastic block; 50. one-way limit rod; 51. guide rod. DETAILED DESCRIPTION

[0031] The following will refer to Figures 1 to 9 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention. Embodiment 1;

[0032] A new type of high pressure closed filter, such as Figure 1 As shown, it includes a shell 1. The shell 1 in this embodiment is composed of two cylindrical objects and a cover plate connected by bolts, so that the shell 1 can be disassembled, which is convenient for the staff to regularly maintain the device in the future, thereby improving the practicality of the device.

[0033] like Figure 1 and Figure 6As shown in the figure, two shells 1 are fixedly connected with a head 2, a central axis, a low-pressure filter cartridge 3 and a high-pressure filter cartridge 4 are arranged in the shell 1, the high-pressure filter cartridge 4 is arranged in a cone shape, the end of the high-pressure filter cartridge 4 with a larger diameter is fixedly connected to the low-pressure filter cartridge 3, and the other end of the high-pressure filter cartridge 4 is provided with a slag discharge pipe 10, the slag discharge pipe 10 passes through the head 2, and the outer wall of the slag discharge pipe 10 is fixed to the head 2 by welding; two partitions 5 are arranged in the shell 1, and the two partitions 5 are detachably connected to the two ends of the low-pressure filter cartridge 3 respectively. In this embodiment, the partition 5 is connected to the low-pressure filter cartridge 3 by bolts, and the partition 5 is arranged in a ring shape; a spiral blade 13 is coaxially fixedly connected to the central axis, and the central axis is composed of a central tube 11 and a cone 12, and the end of the cone 12 with a larger diameter is fixedly connected to one end of the central tube 11, and the space between the low-pressure filter cartridge 3 and the central tube 11 matches the shape of the spiral blade 13 in section A, The space between the high-pressure filter cartridge 4 and the cone 12 matches the shape of the spiral blade 13 in section B; in this embodiment, the edge of the spiral blade 13 in section A fits the inner wall of the low-pressure filter cartridge 3, and the edge of the spiral blade 13 in section B fits the inner wall of the high-pressure filter cartridge 4; a motor 15 is installed on the outer shell 1, and a reducer is installed on the motor 15. The output end of the motor 15 is drivingly connected to the end of the center tube 11 away from the cone 12; the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4 are both used to filter impurities in sewage. It should be noted that during the filtering process, the filtered impurities are deposited or attached to the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4, and filter cakes are formed as the impurities gradually increase; when the motor 15 drives the central shaft to rotate, the spiral blades 13 rotate and scrape off the filter cakes on the inner walls of the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4 to prevent excessive accumulation of filter cakes and blockage, thereby affecting the filtering effect.

[0034] like Figure 1-Figure 5 As shown in the figure, the outer shell 1 is detachably connected to the mounting body 17. In this embodiment, the outer shell 1 is connected to the mounting body 17 by bolts. A conical plug 16 is slidably fitted on the mounting body 17. An annular slot 18 is provided on the mounting body 17. A sleeve 19 is fixedly connected to the side of the conical plug 16 away from the slag discharge pipe 10, and the other end of the sleeve 19 is inserted into the annular slot 18; the sleeve 19 can slide in the annular slot 18, so that the conical plug 16 can move laterally and linearly.

[0035] The inner diameter of the outlet of the slag discharge pipe 10 gradually increases in the direction away from the conical body 12; a spring transverse driving mechanism is provided on the mounting body 17, and the spring transverse driving mechanism pushes against the conical plug 16 to be inserted into the slag discharge pipe 10; the spring transverse driving mechanism includes a rotating drum 22 rotatably connected to the mounting body 17, and a second protrusion is fixedly connected to the inner wall of the rotating drum 22; a push plate 23 is slidably matched in the sleeve 19, and a rotating plate 36 is coaxially rotatably connected to the side of the conical plug 16 close to the push plate 23, and a first spring 24 is installed in the rotating drum 22 between the rotating plate 36 and the push plate 23, and the push plate A push rod 25 and a guide rod 51 are fixedly connected to the side of 23 away from the first spring 24. A blind hole is opened on the mounting body 17, which is not drawn. The other end of the guide rod 51 is inserted into the blind hole and can slide in the blind hole. The guide rod 51 plays a positioning and guiding role; one end of the push rod 25 away from the push plate 23 passes through the mounting body 17 and the rotating drum 22 in sequence, and a second spiral groove matching the second protrusion is provided on the push rod 25. The rotating drum 22 is provided with a hand wheel 30. In this embodiment, an openable protective shell is provided on the outside of the hand wheel 30, and the protective shell can protect the hand wheel 30 and the rotating drum 22.

[0036] When the hand wheel 30 is turned, the rotating drum 22 rotates synchronously with the hand wheel 30, and the push rod 25 can move the push plate 23 laterally through the coordinated arrangement of the second protrusion, the second spiral groove, the guide rod 51 and the blind hole; when the rotating drum 22 rotates forward, the push rod 25 pushes the push plate 23 to move away from the mounting body 17, and the first spring 24 pushes the conical plug 16 to move in the same direction, so that the conical plug 16 is inserted into the outlet of the slag discharge pipe 10, and the sleeve 19 extends out of the annular slot 18; when the rotating drum 22 rotates reversely, the push rod 25 pulls the push plate 23 to move close to the mounting body 17, and the first spring 24 pulls the conical plug 16 to move in the same direction, so that the conical plug 16 is separated from the outlet of the slag discharge pipe 10, and the sleeve 19 is retracted into the annular slot 18.

[0037] It should be noted that after the conical plug 16 is inserted into the outlet of the slag discharge pipe 10, when the drum 22 continues to rotate forward to move the push plate 23 away from the mounting body 17, the pressing force of the conical plug 16 inserted into the slag discharge pipe 10 gradually increases, thereby achieving adjustment of the pressing force.

[0038] In this embodiment, a pressure sensor is provided on the rotating plate 36 , which is not shown. The pressure sensor is used to detect the thrust exerted on the conical plug 16 , so that the user can control the pressing force of the conical plug 16 inserted into the slag discharge pipe 10 .

[0039] An annular mounting groove 28 is provided in the mounting body 17, one end of the rotating drum 22 is inserted into the annular mounting groove 28, a volute spring 29 is installed between the outer surface of the rotating drum 22 and the inner wall of the annular mounting groove 28, when the rotating drum 22 rotates forward, the volute spring 29 contracts to store force.

[0040] A ratchet 31 is coaxially fixedly connected to the outer surface of the rotating drum 22, and a slide groove 32 is provided on the mounting body 17. A guide block is slidably fitted in the slide groove 32, and a one-way limit rod 50 is fixedly connected to the guide block. The bottom end of the one-way limit rod 50 is provided with an inclined surface, and the bottom end of the one-way limit rod 50 is engaged with the tooth groove of the ratchet 31. An electric spring 33 is installed between the bottom of the guide block and the inner bottom wall of the slide groove 32. In the initial state, the electric spring 33 is in a power-off state, that is, the electric spring 33 is in a fully expanded state, at which time the bottom end of the one-way limit rod 50 is engaged with the tooth groove of the ratchet 31; by providing the one-way limit rod 50 with an inclined surface at the bottom end, when the bottom end of the one-way limit rod 50 is engaged with the tooth groove of the ratchet 31, the ratchet 31 can only rotate in the forward direction, that is, the rotating drum 22 can only rotate in the forward direction.

[0041] The two partitions 5 and the head 2 divide the space inside the shell 1 into a raw material chamber 6, a low-pressure filter chamber 7, a high-pressure filter chamber 8 and a slag chamber 9; a feed pipe seat 43, a raw material pressure measuring pipe seat 44, a low-pressure clear liquid discharge pipe seat 45, a clear liquid pressure measuring pipe seat 46, a high-pressure clear liquid discharge pipe seat 47 and a slag outlet 48 are fixedly connected to the shell 1, and the raw material pressure measuring pipe seat 44 and the clear liquid pressure measuring pipe seat 46 are both connected to an external pressure measuring device such as a pressure gauge, and the setting positions of the feed pipe seat 43 and the raw material pressure measuring pipe seat 44 match the raw material chamber 6, the setting positions of the low-pressure clear liquid discharge pipe seat 45 and the clear liquid pressure measuring pipe seat 46 match the low-pressure filter chamber 7, the setting position of the high-pressure clear liquid discharge pipe seat 47 matches the high-pressure filter chamber 8, and the slag outlet 48 is located below the slag chamber 9.

[0042] When the device in this embodiment is in use, the hand wheel 30 is used to drive the rotating drum 22 to rotate in the forward direction (at the same time, the spiral spring 29 contracts to store force), the push rod 25 pushes the push plate 23 to move away from the mounting body 17, and the first spring 24 pushes the conical plug 16 to move in the same direction, so that the conical plug 16 is inserted into the outlet of the slag discharge pipe 10, and the sleeve 19 extends from the annular slot 18.

[0043] It should be noted that after the conical plug 16 is inserted into the outlet of the slag discharge pipe 10, when the drum 22 continues to rotate forward to move the push plate 23 away from the mounting body 17, the pressing force of the conical plug 16 inserted into the slag discharge pipe 10 gradually increases, thereby achieving adjustment of the pressing force.

[0044] It is worth mentioning that in the initial state, the electric spring 33 is in the power-off state, that is, the electric spring 33 is in the fully expanded state. At this time, the bottom end of the one-way limit rod 50 is engaged with the tooth groove of the ratchet 31, and the ratchet 31 can only rotate in the forward direction, that is, after the conical plug 16 is inserted into the slag discharge pipe 10 and moves, the position of the conical plug 16 can be locked.

[0045] Then, the raw liquid is injected into the feed pipe seat 43, and the raw liquid passes through the raw material cavity 6, the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4 in sequence. After being filtered, the raw liquid flows into the low-pressure filter cavity 7 outside the low-pressure filter cartridge 3 and the high-pressure filter cavity 8 outside the high-pressure filter cartridge 4 respectively. It should be noted that during the filtering process, the filtered impurities are deposited or attached to the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4. As the impurities gradually increase, filter cakes are formed. As the filter cakes increase, the filtering will be poor, and the pressure difference inside and outside the low-pressure filter cartridge 3 will gradually increase. The external pressure measuring device is used to measure. When the pressure difference reaches the set value, the motor 1 is started. 5 (a controller is provided in this embodiment, but the controller is not shown. The external pressure measuring device transmits the measured data to the controller. When the pressure difference reaches the set value, the controller controls the motor 15 to start). The motor 15 drives the central cylinder 11 and the cone 12 to rotate. The spiral blades 13 rotate to scrape off the filter cakes on the inner walls of the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4 and push the filter cakes toward the slag discharge pipe 10. After the filter cakes are scraped off, the filtration efficiency is improved. Therefore, the pressure difference between the inside and outside of the low-pressure filter cartridge 3 decreases. The motor 15 is controlled to be turned off to stop the spiral blades 13 from rotating. The device continues to filter by relying on the water pressure difference.

[0046] After repeating the above operation for many times, the spiral blades 13 gradually push the filter cake into the high-pressure filter cartridge 4, causing the filter cake in the high-pressure filter cartridge 4 to be gradually pressurized, thereby separating the residual liquid in the filter cake; when the pressure on the filter cake is greater than the pressing force of the conical plug 16 inserted into the slag discharge pipe 10, the conical plug 16 is slightly away from the slag discharge pipe 10 and an annular gap is generated between the conical plug 16 and the outlet of the slag discharge pipe 10; the filter cake is discharged from the annular gap into the slag cavity 9, and then, under the action of gravity, is finally discharged through the slag discharge port 48.

[0047] After the use of the device, when it is necessary to pull the conical plug 16 out of the slag discharge pipe 10, the electric spring 33 is energized, the electric spring 33 contracts and causes the bottom end of the one-way limiting rod 50 to disengage from the tooth groove of the ratchet 31, and the ratchet 31 is no longer limited. The volute spring 29 releases the force and drives the rotating drum 22 to rotate in the opposite direction. The push rod 25 pulls the push plate 23 to move closer to the mounting body 17, and the first spring 24 pulls the conical plug 16 to move in the same direction, so that the conical plug 16 quickly disengages from the slag discharge pipe 10, and the sleeve 19 is retracted into the annular slot 18. Embodiment 2:

[0048] Based on the first embodiment, Figure 1 , Figure 6 and Figure 8 As shown, an expansion ring 14 is provided at the edge of the spiral blade 13. In this embodiment, the edge of the spiral blade 13 does not fit the inner walls of the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4. The outer surface of the expansion ring 14 of section A fits the inner wall of the low-pressure filter cartridge 3; the outer surface of the expansion ring 14 of section B fits the inner wall of the high-pressure filter cartridge 4.

[0049] like Figure 3 and Figure 4 As shown, a plurality of telescopic grooves 26 are provided on the conical plug 16, and a split piece 27 is slidably fitted in the telescopic groove 26. An elastic block 49 is installed between one side of the split piece 27 inserted into the telescopic groove 26 and the inner wall of the telescopic groove 26; when the conical plug 16 is inserted into the slag discharge pipe 10, the split piece 27 contacts the side wall at the outlet of the slag discharge pipe 10 and causes the split piece 27 to be retracted into the telescopic groove 26, and at the same time the elastic block 49 is compressed and stores force; when the conical plug 16 is separated from the slag discharge pipe 10, the elastic block 49 releases the force to expand and push the split piece 27 out of the telescopic groove 26; a first protrusion 20 is fixedly connected to the inner wall of the annular slot 18, and a first spiral groove 21 matching the first protrusion 20 is provided on the sleeve 19.

[0050] like Figure 1 , Figure 3-Figure 7 and Fig. 9 As shown, a piston mechanism is provided in the center tube 11, and the conical plug 16 is drivingly connected to the piston mechanism; a flow channel is provided in the spiral blade 13, and the center tube 11 is connected to the inside of the expansion ring 14 through the flow channel; the piston mechanism includes a piston 34 that is slidingly sealed and fitted in the center tube 11, and the piston 34 can only slide in the center tube 11 (for example, the piston 34 is elliptical), and a second spring 35 is installed in the center tube 11 on the side of the piston 34 away from the cone 12, and an outer tube 37 is coaxially fixedly connected to the piston 34, and a third protrusion is fixedly connected to the inner wall of the outer tube 37; an inner tube 38 is coaxially rotatably connected to the cone 12, one end of the inner tube 38 is inserted into the outer tube 37, and a third spiral groove matching the third protrusion is opened on the outer surface of the inner tube 38.

[0051] When the inner cylinder 38 is stationary, when the central cylinder 11 rotates forward or reversely, the outer cylinder 37 rotates synchronously with the central cylinder 11 , and the piston 34 moves toward or away from the cone 12 through the cooperation of the third protrusion and the third spiral groove.

[0052] A clearance groove 39 is provided on the cone 12, and a block 41 is fixedly connected to the inner wall of the clearance groove 39; a positioning rod 40 is coaxially fixedly connected to the side of the cone plug 16 close to the cone 12, and the positioning rod 40 passes through the cone 12 and the clearance groove 39 in sequence and is inserted into the interior of the inner cylinder 38. The positioning rod 40 can support the cone 12, improve the stability of the spiral blade 13 during rotation, and a key strip 42 is fixedly connected to the outer surface of the positioning rod 40. A key groove matching the key strip 42 is provided on the inner wall of the inner cylinder 38. The positioning rod 40 can only perform horizontal linear motion in the inner cylinder 38.

[0053] When the device in this embodiment is in use, the motor 15 is started to drive the driving center tube 11 and the cone 12 to rotate forward (the motor 15 in this embodiment is a servo motor, which can rotate forward and backward and can adjust the speed), and the spiral blade 13 drives the expansion ring 14 to rotate forward (in the initial state, the piston 34 is located at the extreme position close to the cone 12, that is, the air pressure between the cone 12 and the piston 34 is the maximum, and the expansion ring 14 is in an expanded state at this time, and the expansion ring 14 fits the inner wall of the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4), scrapes off the filter cake on the inner wall of the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4 and pushes the filter cake toward the slag discharge pipe 10.

[0054] During the filter cake pushing process, when the pressure on the filter cake is greater than the pressing force of the conical plug 16 inserted into the slag discharge pipe 10 (in the initial state, the conical plug 16 is inserted into the slag discharge pipe 10), the conical plug 16 is slightly away from the slag discharge pipe 10 and an annular gap is generated between the conical plug 16 and the outlet of the slag discharge pipe 10. It should be noted that in the first embodiment, when the filter cake is discharged from the annular gap, it is subjected to the extrusion force and the discharged filter cake is a whole piece. The filter cake discharge resistance is large, and the whole piece of filter cake is not conducive to the filter cake falling into the slag cavity 9. Too large a filter cake may also easily cause blockage of the slag outlet 48. In the present embodiment, when the conical plug 16 is away from the slag discharge pipe 10, the elastic block 49 pushes against the dividing piece 27 and extends out of the telescopic groove 26. When the filter cake is discharged from the annular gap, it is divided by the dividing piece 27, which is beneficial to the discharge of the filter cake.

[0055] It is worth noting that, in the initial state, the piston 34 is located at the extreme position where it can be close to the cone 12. At this time, the second spring 35 is in a slightly stretched force storage state, and the third protrusion is located at the extreme position where it can be close to the cone 12. At this time, the third protrusion is disengaged from the left end of the third spiral groove. When the center tube 11 rotates forward with the spiral blade 13, the piston 34 rotates synchronously with the center tube 11, and the outer tube 37 rotates forward. Since the third protrusion is disengaged from the third spiral groove, the outer tube 37 will not cooperate with the inner tube 38 to drive at this time, that is, the piston 34 will not move laterally in a straight line, that is, during the process of scraping and pushing the filter cake by the device, the air pressure between the cone 12 and the piston 34 will not change, and the expansion ring 14 will always be in an expanded state.

[0056] It should be noted that during the use of the device, some filter cakes will adhere to the surface of the spiral blade 13. After the use of the device is completed and the liquid in the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4 is completely discharged, the motor 15 is started to drive the central cylinder 11 and the cone 12 to rotate in the opposite direction at high speed, and the spiral blade 13 rotates in the opposite direction at high speed; at the initial stage of the reverse rotation of the central cylinder 11, the outer cylinder 37 rotates in the opposite direction, and under the influence of the tensile force of the second spring 35, the third protrusion is engaged with the third spiral groove, so that the outer cylinder 37 pushes against the piston 34 to move away from the cone 12 (because the conical plug 16 is plugged into the slag discharge pipe 1 at this time). 0 state, and the first protrusion 20 and the first spiral groove 21 are in an engaged state, so the rotation resistance of the conical plug 16 is relatively large, and through the matching arrangement of the positioning rod 40, the key bar 42 and the key groove, that is, the rotation resistance of the inner cylinder 38 is relatively large, so during the rotation of the outer cylinder 37, the inner cylinder 38 will not be caused to rotate, and the inner cylinder 38 is pulled out of the outer cylinder 37 when the outer cylinder 37 rotates), the air pressure between the cone 12 and the piston 34 is reduced, so that the expansion ring 14 shrinks and no longer fits the inner walls of the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4, thereby reducing the resistance of the spiral blade 13 when it rotates in the opposite direction.

[0057] It is worth noting that when the piston 34 moves away from the cone 12, the second spring 35 will be compressed and accumulate force. When the piston 34 moves away from the cone 12 to the limit, the third protrusion moves to disengage from the right end of the third spiral groove, allowing the spiral blade 13 to continue to rotate in the opposite direction at high speed.

[0058] When the spiral blade 13 rotates in the opposite direction at high speed, the filter cake on the surface of the spiral blade 13 is thrown off to the inner walls of the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4 under the action of centrifugal force, so as to achieve the purpose of cleaning the surface of the spiral blade 13; it should be noted that during the reverse rotation of the spiral blade 13, since the expansion ring 14 shrinks and no longer fits the inner walls of the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4, there is a gap between the inner walls of the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4 and the spiral blade 13. Therefore, during the reverse rotation of the spiral blade 13, the thrown-off filter cake will not be pushed to move toward the raw material chamber 6.

[0059] After the filter cake on the surface of the spiral blade 13 is thrown off, the motor 15 is controlled again to drive the central tube 11 and the cone 12 to rotate forward, and the outer tube 37 rotates forward. The second spring 35 pushes against the piston 34 to make the third protrusion engage with the right end of the third spiral groove. When the outer tube 37 rotates forward, the piston 34 moves close to the cone 12 to reset. The air pressure between the piston 34 and the cone 12 increases, causing the expansion ring 14 to expand and re-fit the inner walls of the low-pressure filter cartridge 3 and the high-pressure filter cartridge 4. The spiral blade 13 rotates forward with the expansion ring 14 and pushes the thrown-off filter cake to the slag discharge pipe 10, and finally the filter cake is discharged.

[0060] After the device is used, the control electric spring 33 is energized. The first spring 24 pulls the rotating plate 36 and moves the conical plug 16 toward the mounting body 17 according to the working principle of the first embodiment, so that the conical plug 16 is separated from the slag discharge pipe 10, and the sleeve 19 is received in the annular slot 18.

[0061] It should be noted that, in the initial stage of the conical plug 16 detaching from the slag discharge pipe 10, through the cooperation of the first protrusion 20 and the first spiral groove 21, the sleeve 19 is retracted into the annular slot 18 while the conical plug 16 is rotated (in the present embodiment, the distance between the first spiral groove 21 is relatively short, and the rotation amplitude of the conical plug 16 is between 1 and 2 circles). As the conical plug 16 detaches from the slag discharge pipe 10, the split piece 27 gradually extends out of the telescopic groove 26, so that the edge of the split piece 27 always fits the inner wall of the outlet of the slag discharge pipe 10. When the conical plug 16 rotates with the split piece 27, the filter cake adhered to the inner wall of the outlet of the slag discharge pipe 10 can be scraped off, thereby achieving the purpose of cleaning, and further improving the practicality of the device.

[0062] It is worth noting that when the conical plug 16 is separated from the slag discharge pipe 10, the positioning rod 40 will be pulled out of the inner tube 38 with the key bar 42. When the conical plug 16 is completely separated from the slag discharge pipe 10, the leftmost end of the key bar 42 moves to correspond to the stopper 41, and the sleeve 19 is completely received in the annular slot 18. At this time, the first protrusion 20 and the first spiral groove 21 are no longer engaged, that is, the rotation resistance of the conical plug 16 is small; at this time, the high-speed rotation of the cone 12 and the center tube 11 can drive the stopper 41 to rotate, and the stopper 41 pushes against the key bar 42 to rotate with the positioning rod 40, so that the conical plug 16 rotates at a high speed. Under the action of centrifugal force, the filter cake on the conical plug 16 is thrown off, thereby achieving the effect of cleaning the surface of the conical plug 16.

[0063] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0064] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A novel high pressure sealed filter, comprising a housing (1), characterized in that: A head (2) is fixedly connected to the shell (1), and a central axis, a low-pressure filter cartridge (3) and a high-pressure filter cartridge (4) are provided in the shell (1). The high-pressure filter cartridge (4) is arranged in a conical shape. The end of the high-pressure filter cartridge (4) with a larger diameter is fixedly connected to the low-pressure filter cartridge (3). The other end of the high-pressure filter cartridge (4) is provided with a slag discharge pipe (10), and the slag discharge pipe (10) passes through the head (2). Two partitions (5) are provided in the shell (1), and the two partitions (5) are detachably connected to the two ends of the low-pressure filter cartridge (3) respectively. A spiral blade ( 13), an expansion ring (14) is provided at the edge of the spiral blade (13), the central axis is composed of a central cylinder (11) and a cone (12), the space between the low-pressure filter cartridge (3) and the central cylinder (11) matches the shape of the spiral blade (13) in section A, and the outer surface of the expansion ring (14) in section A fits with the inner wall of the low-pressure filter cartridge (3); the space between the high-pressure filter cartridge (4) and the cone (12) matches the shape of the spiral blade (13) in section B, and the outer surface of the expansion ring (14) in section B fits with the inner wall of the high-pressure filter cartridge (4); A motor (15) is mounted on the outer shell (1), and an output end of the motor (15) is drivingly connected to an end of the center tube (11) away from the conical body (12); a mounting body (17) is detachably connected to the outer shell (1), and a conical plug (16) is slidably fitted on the mounting body (17), and a spring transverse driving mechanism is provided on the mounting body (17), and the spring transverse driving mechanism pushes against the conical plug (16) and inserts it into the slag discharge pipe (10); a piston mechanism is provided in the center tube (11), and the conical plug (16) is drivingly connected to the piston mechanism; a flow channel is provided in the spiral blade (13), and the center tube (11) is connected to the inside of the expansion ring (14) through the flow channel.

2. A novel high pressure sealed filter according to claim 1, characterized in that: The inner diameter of the outlet of the slag discharge pipe (10) gradually increases in a direction away from the conical body (12); a plurality of expansion slots (26) are provided on the conical plug (16); a split piece (27) is slidably fitted in the expansion slot (26); an elastic block (49) is installed between one side of the split piece (27) inserted into the expansion slot (26) and the inner wall of the expansion slot (26).

3. A novel high pressure sealed filter according to claim 1, characterized in that: The mounting body (17) is provided with an annular slot (18), a sleeve (19) is fixedly connected to the side of the conical plug (16) away from the slag discharge pipe (10), the other end of the sleeve (19) is inserted into the annular slot (18), a first protrusion (20) is fixedly connected to the inner wall of the annular slot (18), and a first spiral groove (21) matching the first protrusion (20) is provided on the sleeve (19).

4. A novel high pressure sealed filter according to claim 3, characterized in that: The spring transverse driving mechanism comprises a rotating cylinder (22) rotatably connected to the mounting body (17), the inner wall of the rotating cylinder (22) being fixedly connected to a second protrusion; a push plate (23) is slidably fitted in the sleeve (19), a rotating plate (36) is coaxially rotatably connected to a side of the conical plug (16) close to the push plate (23), a first spring (24) is installed in the rotating cylinder (22) between the rotating plate (36) and the push plate (23), a push rod (25) and a guide rod (51) are fixedly connected to a side of the push plate (23) away from the first spring (24), a blind hole is provided in the mounting body (17), the other end of the guide rod (51) is inserted into the blind hole and can slide in the blind hole, the end of the push rod (25) away from the push plate (23) passes through the mounting body (17) and the rotating cylinder (22) in sequence, and a second spiral groove matching the second protrusion is provided on the push rod (25).

5. A novel high pressure sealed filter according to claim 4, characterized in that: An annular mounting groove (28) is provided in the mounting body (17), one end of the rotating drum (22) is inserted into the annular mounting groove (28), a spiral spring (29) is installed between the outer surface of the rotating drum (22) and the inner wall of the annular mounting groove (28), and the rotating drum (22) is provided with a hand wheel (30).

6. A novel high pressure sealed filter according to claim 4, characterized in that: A ratchet (31) is coaxially fixedly connected to the outer surface of the rotating drum (22); a slide groove (32) is provided on the mounting body (17); a guide block is slidably fitted in the slide groove (32); a one-way limit rod (50) is fixedly connected to the guide block; a slope is provided at the bottom end of the one-way limit rod (50); the bottom end of the one-way limit rod (50) is engaged with the tooth groove of the ratchet (31); and an electric spring (33) is installed between the bottom of the guide block and the inner bottom wall of the slide groove (32).

7. A novel high pressure sealed filter according to claim 1, characterized in that: The piston mechanism comprises a piston (34) which is slidingly sealed and fitted in a central tube (11); a second spring (35) is installed in the central tube (11) on a side of the piston (34) away from the conical body (12); an outer tube (37) is coaxially fixedly connected to the piston (34); and a third protrusion is fixedly connected to the inner wall of the outer tube (37).

8. A novel high pressure sealed filter according to claim 7, characterized in that: An inner cylinder (38) is coaxially rotatably connected to the conical body (12), one end of the inner cylinder (38) is inserted into the outer cylinder (37), and a third spiral groove matching the third protrusion is provided on the outer surface of the inner cylinder (38); a clearance groove (39) is provided on the conical body (12), and a stopper (41) is fixedly connected to the inner wall of the clearance groove (39); a positioning rod (40) is coaxially fixedly connected to the side of the conical plug (16) close to the conical body (12), the positioning rod (40) sequentially passes through the conical body (12), the clearance groove (39) and is inserted into the inner cylinder (38), a key bar (42) is fixedly connected to the outer surface of the positioning rod (40), and a key groove matching the key bar (42) is provided on the inner wall of the inner cylinder (38).

9. A novel high pressure sealed filter according to claim 1, characterized in that: The two partitions (5) and the sealing head (2) divide the space inside the housing (1) into a raw material chamber (6), a low-pressure filter chamber (7), a high-pressure filter chamber (8) and a slag chamber (9).

10. A novel high pressure sealed filter according to claim 9, characterized in that: The housing (1) is fixedly connected with a feed pipe seat (43), a raw material pressure measuring pipe seat (44), a low-pressure clear liquid discharge pipe seat (45), a clear liquid pressure measuring pipe seat (46), a high-pressure clear liquid discharge pipe seat (47) and a slag outlet (48); the feed pipe seat (43) and the raw material pressure measuring pipe seat (44) are arranged at positions matching the raw material cavity (6); the low-pressure clear liquid discharge pipe seat (45) and the clear liquid pressure measuring pipe seat (46) are arranged at positions matching the low-pressure filter cavity (7); the high-pressure clear liquid discharge pipe seat (47) is arranged at positions matching the high-pressure filter cavity (8); and the slag outlet (48) is located below the slag cavity (9).

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