Solid-liquid separation mechanism of expansion tubular filter

Abstract

The invention relates to an expansion tube type filter, in particular to an expansion tube type filter solid-liquid separation mechanism which comprises a fixed support, a barrel, a water inlet and a water outlet, the water inlet and the water outlet are formed in the two sides of the barrel, the expansion tube type filter solid-liquid separation mechanism further comprises a transmission assembly, and the transmission assembly is installed in the barrel. The transmission assembly connects the moving rod with the power-assisted plate through the linkage rotating shaft, the power-assisted plate is connected with the expansion membrane through the clockwork spring, the expansion membrane is stretched to form wrinkles within the rupture strength range under the limitation of the clockwork spring, the contact area of water to be treated and the expansion membrane is increased through the wrinkle structure, and the compression spring can generate elastic force to drive the expansion membrane to rebound. The reciprocating motion of the moving rod drives the sliding block to move, meanwhile, the rack and the gear are meshed and matched to control the opening size of the drainage pipe, when the water flow speed is too high, the expansion membrane forms wrinkles to increase the contact area with the water flow, and the opening of the drainage pipe is enlarged for drainage, so that the filtering effect of the filter is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inflatable drum filter, in particular to a solid-liquid separation mechanism of inflatable drum filter. BACKGROUND

[0002] In many industrial and environmental treatment processes, such as lime method, double alkali method and other calcium method for treating SO2-containing flue gas or regenerated alkaline absorption liquid, and treating waste water and waste acid in sulfuric acid production, slurry containing solid particles will be generated. In order to eliminate secondary pollution and reuse these slurry, environmental treatment is needed, and a key step is solid-liquid separation.

[0003] Inflatable drum filter is a pressure filtration device, which separates solid-liquid mixture under pressure through filter medium. The filter medium is usually composed of a series of porous tubular filter cores, and solid-liquid separation is realized by applying back pressure or elastic rebound. It can effectively separate solid-liquid mixture, reduce wastewater discharge and solid waste treatment cost, so it is widely used in the fields of treating liquid solid suspension, high concentration wastewater, industrial wastewater, mine tailings, etc.

[0004] The existing inflatable drum filter equipment needs to control the back pressure of water flow to realize solid-liquid separation, so the solid-liquid separation effect of inflatable drum membrane will be restricted by water flow speed. When the water flow speed is too fast, the pore size of the inflatable drum membrane will become larger and the surface contact will not be sufficient, which will cause solid particles or high molecular substances to be unable to be effectively filtered out, thereby affecting the filtering effect. Therefore, it involves the arrangement of inflatable drum, control system and design of solid-liquid separation chamber, which makes the maintenance and operation of the equipment relatively complex, and requires professional technicians for maintenance.

[0005] In view of the above situation, in order to overcome the above technical problems, the present application designs a solid-liquid separation mechanism of inflatable drum filter, which solves the above technical problems. SUMMARY

[0006] The technical purpose to be achieved by the present application is that when the water flow speed is too fast, the inflatable drum membrane can form different degrees of wrinkles according to the water flow speed, the formed wrinkles adjust the surface area of the inflatable drum membrane in contact with the water to be filtered, reduce the influence on the membrane pore size, and thus improve the service life and filtering effect of the inflatable drum membrane.

[0007] In order to achieve the above technical purpose, the present application provides the following technical scheme:

[0008] The application provides a drum tube type filter solid-liquid separation mechanism, which comprises a fixed support, a cylinder, a water inlet and a water outlet, the cylinder is installed on the fixed support, the water inlet and the water outlet are installed on the two sides of the cylinder, further comprises a transmission assembly, the transmission assembly is installed inside the cylinder, the transmission assembly connects the moving rod and the booster plate through the linkage shaft, the booster plate is connected with the drum membrane through the clockwork, part of the drum membrane is stored in the storage groove, the drum membrane outside the supporting cage is pushed by the water flow, under the limitation of the clockwork, the drum membrane is stretched to form a wrinkle and the compression spring is compressed in the breaking strength range, the wrinkle structure increases the contact area of the water to be filtered and the drum membrane, when the water pressure outside the drum membrane makes the displacement of the moving rod to the drain pipe reach the maximum deformation of the compression spring, the elastic force drives the drum membrane to recover and rebound, thereby flushing away part of the deposits on the surface of the drum membrane, the back-and-forth movement of the moving rod drives the sliding block to move, the rack movement is engaged with the gear to control the opening size of the drain pipe, when the water flow velocity is too large, the drum membrane forms a wrinkle to increase the contact area with the water flow, the opening of the drain pipe is larger to drain water, thereby improving the filtering effect and efficiency of the filter.

[0009] The transmission assembly comprises a drum membrane, a supporting cage, a booster plate and a drain block, the filter membrane is generally divided into three materials, which are polyester fiber, polypropylene fiber and polypropylene. The material of the polyester fiber is relatively soft, has a high filtering efficiency, can filter out small particulate matters in the air, and can be repeatedly cleaned and used. The material of the polypropylene fiber is relatively hard, has a low filtering efficiency, can only filter out large particulate matters, and cannot filter out small particulate matters. The material of the polypropylene is relatively soft, can filter out small particulate matters, but cannot be repeatedly cleaned and used. The drum membrane is installed on the outer surface of the supporting cage, the supporting cage has a "cage" structure, the "cage" structure prevents the drum membrane from collapsing excessively and can block part of the short fibers and impurities, a plurality of fixed rods and three moving rods are installed on the side surface of the supporting cage in a ring array, the rod pieces in the ring array ensure the stability of the supporting cage and play a certain guiding role on the movement of the drum membrane after being impacted by the water flow, the moving rods move back and forth to the axis of the supporting cage, when the water flow velocity is large, the moving rods move close to the axis of the supporting cage, thereby increasing the water pressure at the water inlet channel, so that the filtered water accelerates through the water inlet channel, the booster plate is rotatably installed with the moving rods through the linkage shaft, support plates are installed at the upper and lower ends of the supporting cage, the support plates are provided with sliding rails, the moving rods are slidably installed on the sliding rails, the upper end of the moving rod is installed with a sliding block, one side of the sliding block is installed with a rack, the lower end of the sliding block is installed with the upper end of the moving rod, one end of the compression spring is clamped with one end of the sliding rail, the other end of the compression spring is clamped with one side of the moving rod, and the drain block is installed at the central axis position inside the supporting cage, so that the greater the water flow velocity is, the greater the surface area of the drum membrane in contact with the water to be filtered is, and the greater the opening of the drain pipe is, thereby improving the filtering effect.

[0010] The shape of the slide rail is a "key" shape opened in the support plate, the design of the "key" shape slide rail makes the moving rod be limited by the circular arc matched with the side surface at the starting position and the ending position of movement, and the length of the "key" shape at the upper end is greater than the length of the "key" shape at the lower end, because the compression spring is also clamped in the "key" shape at the upper end, when the moving rod moves to compress the compression spring to a large deformation, the length of the "key" shape at the lower end corresponds to the ending position of the moving rod, so the length of the slide rail at the lower end is less than the length of the slide rail at the upper end, the width of the "key" shape is consistent with the diameter of the moving rod, so that the moving rod makes linear sliding in the slide rail, and the stability of the transmission assembly is increased.

[0011] The power assisting block comprises a power assisting plate, a sliding pin, a linkage rotating shaft, a storage groove and a cylindrical groove, the sliding pin is installed at both ends of the power assisting plate, the power assisting plate is rotationally installed on the linkage rotating shaft, the storage groove and the cylindrical groove are opened in the power assisting plate, the power assisting plate is a rectangular plate which can rotate around the linkage rotating shaft, two rectangular plates are rotationally installed on each rotating shaft, the two rotatable rectangular plates rotate under the pushing of water flow to form a gap to expand the drum membrane, the rotating angle between the two power assisting plates is limited to within 120° by the sliding pins installed at the upper and lower ends, so that the movement of the three moving rods does not affect each other and prevents the rotating angle of the two power assisting plates from being too large, thereby preventing the drum membrane from being excessively stretched to affect the filtering effect, and the sliding pin is slidingly installed in the sliding groove opened in the supporting cage.

[0012] The storage groove is a rectangular groove matched with the power assisting plate, the rectangular storage groove allows the expandable part of the drum membrane to be flatly stored, the upper and lower ends of the rectangular storage groove are symmetrically left with gaps from the upper and lower ends of the power assisting plate, so that the drum membrane can be stretched in and out of the storage groove from the two ends, one end of the rectangular groove close to the linkage rotating shaft is left with a gap of one fifth of the power assisting plate, the one fifth gap allows the cylindrical groove to be opened parallel to the linkage rotating shaft, so that the clockwork with the drum membrane can store as much drum membrane as possible from the direction close to the linkage rotating shaft, and the upper and lower ends of the storage groove are symmetrically distributed in the axial direction of the power assisting plate, so that the drum membrane is stretched to form a wrinkle at the central position of the power assisting plate, reducing the influence on the pore size of the drum membrane.

[0013] The cylindrical groove is symmetrically opened on one side of the storage groove, the cylindrical groove is a cylindrical groove matched with the shape of the clockwork, and is symmetrically opened on one side of the storage groove close to the linkage rotating shaft, the clockwork is horizontally installed in the cylindrical groove, one end of the clockwork is provided with the drum membrane, so that when the power assisting plate is rotated by the water flow, the horizontal cross-sectional shape of the cylindrical groove is a circular arc, the clockwork which is contracted into a ring shape in the cylindrical groove is stretched, so that the drum membrane is formed into a wrinkle to increase the contact surface area with the water to be filtered.

[0014] The drainage block comprises a drainage pipe, a water inlet channel, a vane, an opening control rod, a rotating pin, a gear and a rack. The drainage pipe is fixedly installed at the center of the support cage, so that the drainage pipe is stable under pressure and connected with the annular array installed transmission assembly, thereby improving the stability of the drainage block. The drainage pipe has an upper opening and a lower end closure structure. The lower end closure of the drainage pipe reduces the influence of the air pressure in the drainage pipe on the water to be drained. The upper end of the drainage pipe is designed to have a through hole for drainage, so that the water to be drained rises under the action of water pressure and is discharged through the opening at the upper end. A plurality of water inlet channels are formed in the side surface of the drainage pipe, so that the filtered water enters the drainage pipe from the side surface of the drainage pipe. The water inlet channel is an arc-shaped through hole formed around the central axis of the drainage pipe. The arc-shaped through hole causes the filtered water to flow transversely at the water inlet channel, thereby forming a vortex and accelerating the filtered water into the drainage pipe. The diameter of the water inlet channel gradually decreases towards the central axis of the drainage pipe. The gradually decreasing diameter is conducive to the drainage pipe absorbing a large amount of filtered water from the large-diameter end under the action of water pressure and air pressure, reducing the air pressure in the drainage pipe and accelerating the discharge of the water to be drained. One end of the vane is installed at the upper end of the drainage pipe, and the other end of the vane is installed with one end of the opening control rod. The other end of the opening control rod is installed with a gear. The water inlet channel designed around the central axis causes the filtered water to rapidly enter the drainage pipe in the form of a rotating vortex, so that a negative pressure is generated around the drainage pipe, thereby forming a water pressure difference between the inside and outside of the inflated membrane and improving the filtering rate of the inflated membrane at the wrinkle.

[0015] The vane has a shape similar to a triangle. The triangular structure has stability, and the rotating pin rotates and fixes one corner of the vane. By swinging the other corner, the other two sides will move correspondingly. The structure is simple. The edges of the triangular vane are "undulating", that is, the edges of the triangular vane have ups and downs, so that the edges are tightly combined when the vane is closed, and the opening of the drainage pipe is closed. When the vane is driven, the undulating edges of the vane make the opening of the outlet more flexible. The length of the center line of the triangular vane is greater than the radius of the through hole of the drainage pipe, so that the through hole of the drainage pipe is completely closed by the vane when there is no need for drainage. Therefore, the drainage block can adjust the size of the opening of the drainage pipe according to the water flow rate under the transmission of other transmission assemblies, thereby balancing the water pressure inside and outside the inflated membrane and improving the filtering effect and efficiency of the mechanism.

[0016] The two ends of the opening control lever are two different sizes of circles in the horizontal cross section direction, and the circle connected with one end of the vane is smaller than the circle connected with one end of the gear, so that the opening control lever is driven by the large circle end to the small circle end, and due to the radius difference between the large circle end and the small circle end, a larger torque can be generated at the small circle end to drive the vane to rotate, so that the opening and closing of the opening control pipe to the vane is more sensitive, the gear is coaxially installed at the upper end of the drain pipe, the radius of the gear is larger than the radius of the drain pipe, and the gear is rotatably installed with the rack, so that the movement of the booster lever and the moving lever is converted into the meshing rotation of the rack and the gear, thereby driving the opening control lever to rotate, and the vane is opened by the opening control lever to discharge the water in the drain pipe.

[0017] The included angle between the rack and the support plate is an acute angle, and the rack keeps synchronous movement around the drain pipe, the acute angle converts the linear reciprocating movement of the three circumferentially arranged moving levers into the synchronous rotation of the three racks around the gear, and the rotation of the gear controls the opening size of the drain pipe, so that the movement of each component of the transmission assembly is integrated, the movement of the booster block caused by the influence of the water flow drives the movement of the drain block, and the solid-liquid separation work of the filter is completed.

[0018] The beneficial effects of the present application are as follows:

[0019] 1. The present application forms a complete solid-liquid separation mechanism by combining the design of the transmission assembly and the inflatable membrane, so that when the water flow speed is too large, the inflatable membrane forms wrinkles to increase the contact area with the water to be filtered and reduce the influence on the membrane aperture, and the water outlet is enlarged to accelerate drainage, so that the filter can adjust the inflatable membrane and the drainage efficiency according to the water flow speed, and the filtering effect of solid-liquid separation when the water flow speed is too large is improved.

[0020] 2. The present application stores the coil and the inflatable membrane in the circular groove and the storage groove in the rotatable rectangular booster plate, and the coil is connected with the inflatable membrane, so that the stored inflatable membrane can stretch to form wrinkles when the water flow speed is too large, thereby increasing the contact area with the water to be filtered and reducing the influence on the membrane aperture, and the filtering effect of the filter is improved.

[0021] 3. The present application is provided with the transmission assembly on the support cage, and the annularly arranged moving levers move the inflatable membrane forming wrinkles to the drain pipe under the push of the booster plate, so as to increase the water pressure outside the drain pipe, make the liquid filtered by the inflatable membrane quickly enter the arc-shaped water inlet channel around the drain pipe which is gradually reduced in diameter, and the movement of the moving levers drives the work of the drain block, so that the opening of the drain pipe becomes larger, thereby accelerating the discharge of the water filtered by the inflatable membrane, and ensuring the working efficiency of the inflatable membrane. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] The above and other aspects of the present application will now be described, by way of example only, with reference to the accompanying drawings in which:

[0024] Figure 1 is a schematic diagram of the overall appearance structure of the present application;

[0025] Figure 2 is a schematic diagram of the installation position of the transmission assembly of the present application;

[0026] Figure 3 is a schematic diagram of the positional relationship of the components of the present application;

[0027] Figure 4 is a schematic diagram of the working state of the present application Figure 3 is a sectional view of the perspective of the assisting plate A-A;

[0028] Figure 5 is a schematic diagram of the installation position and structure of the slide rail of the present application;

[0029] Figure 6 is a schematic diagram of the installation position of the round groove and the clockwork of the present application;

[0030] Figure 7 is a schematic diagram of the installation position of the water inlet channel and the drain pipe of the present application;

[0031] Figure 8 is a schematic diagram of the installation position of the components of the drain block of the present application;

[0032] Figure 9 is a schematic diagram of the installation position of the gear rack of the present application;

[0033] Figure 10 is a schematic diagram of the working state of the present application when filtering stably;

[0034] Figure 11 is a schematic diagram of the working state of the present application when the water flow speed is too high.

[0035] In the diagram: 1. Fixed bracket; 2. Cylinder; 3. Inlet; 4. Outlet; 5. Transmission assembly; 51. Expansion diaphragm; 52. Support cage; 521. Fixed rod; 522. Moving rod; 523. Support plate; 524. Slider; 525. Slide rail; 526. Compression spring; 527. Slide groove; 53. Assist block; 531. Assist plate; 532. Sliding pin; 533. Linkage shaft; 534. Storage groove; 535. Cylindrical groove; 54. Spring; 55. Drain block; 551. Drain pipe; 552. Water inlet channel; 553. Blade; 554. Opening control rod; 555. Rotating pin; 556. Gear; 557. Rack. Detailed Implementation

[0036] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0037] like Figures 1 to 11 As shown, this invention provides a solid-liquid separation mechanism for an expansion tube filter, including a fixed support 1, a cylinder 2, an inlet 3, and an outlet 4. The cylinder 2 is mounted on the fixed support 1, and the inlet 3 and outlet 4 are installed on both sides of the cylinder 2. It also includes a transmission assembly 5, which is installed inside the cylinder 2. An expansion membrane 51 covers the outside of a support cage 52 and is in contact with the liquid to be filtered. One end of the expansion membrane 51 is connected to one end of a spring 54 and is stored in an assist block 53. The transmission assembly 5 connects a moving rod 522 to an assist plate 531 via a linkage shaft 533. The assist plate 531 is connected to the expansion membrane 51 via the spring 54, allowing a portion of the expansion membrane 51 to be stored in a storage groove 534. The portion of the expansion membrane 51 covering the support cage 52 is then filtered by water. Driven by the flow, and constrained by the spring 54, the diaphragm 51 is stretched within its burst strength range to form folds, and the compression spring 526 is compressed. This folded structure increases the contact area between the water to be filtered and the diaphragm 51. When the external water pressure causes the moving rod 522 to move towards the drain pipe 551 to the maximum deformation of the compression spring 526, the elastic force causes the diaphragm 51 to rebound, thereby backwashing away some of the deposits on the surface of the diaphragm 51. The reciprocating motion of the moving rod 522 drives the slider 524 to move, while the rack 557 moves and meshes with the gear 556 to control the opening size of the drain pipe 551. When the water flow velocity is too high, the diaphragm 51 forms folds to increase the contact area with the water flow, and the opening of the drain pipe 551 becomes larger to drain water, thereby improving the filtration effect and efficiency of the filter.

[0038] like Figure 3 and Figure 4As shown, the transmission assembly 5 includes an inflatable membrane 51, a supporting cage 52, a booster plate 531 and a drainage block 55. The inflatable membrane 51 is made of polyester fiber, which is soft and has high filtering efficiency, can filter out tiny particulate matter, and can be repeatedly cleaned and used. The inflatable membrane 51 is installed on the outer surface of the supporting cage 52. The supporting cage 52 has a "cage" structure, which prevents the inflatable membrane 51 from collapsing excessively and blocks a part of the short fibers and impurities. A plurality of fixed rods 521 and three moving rods 522 are arranged in an annular array on the side surface of the supporting cage 52. The annular array of rod members ensures the stability of the supporting cage 52 and plays a certain guiding role in the movement of the inflatable membrane 51 after being impacted by the water flow. The moving rod 522 makes reciprocating motion towards the axis of the supporting cage 52. When the water flow speed is high, the moving rod 522 is pushed to move close to the axis of the supporting cage 52, thereby increasing the water pressure at the water inlet passage 552, so that the filtered water accelerates through the water inlet passage 552. The booster plate 531 is rotatably installed with the moving rod 522 through the linkage shaft 533. The supporting cage 52 is provided with support plates 523 at the upper and lower ends. The support plates 523 are provided with slide rails 525. The moving rod 522 is slidably installed on the slide rails 525. The upper end of the moving rod 522 is provided with a sliding block 524. One side of the sliding block 524 is provided with a rack 557. The lower end of the sliding block 524 is provided with the upper end of the moving rod 522. One end of the compression spring 526 is clamped with one end of the slide rail 525. The other end of the compression spring 526 is clamped with one side of the moving rod 522. The drainage block 55 is installed at the central axis position inside the supporting cage 52, so that the greater the water flow speed, the greater the surface area of the inflatable membrane 51 in contact with the water to be filtered, and the greater the opening of the drain pipe 551, thereby improving the filtering effect.

[0039] As shown in Figure 5 , the shape of the slide rail 525 is a "key" shape opened in the support plate 523. The "key" shape of the slide rail 525 is designed to have a circular arc on the side surface to limit the starting position and the ending position of the moving rod 522. The length of the "key" shape at the upper end is greater than the length of the "key" shape at the lower end. Since the "key" shape slot at the upper end is also clamped with the compression spring 526, when the moving rod 522 moves and the compression spring 526 is compressed to a large deformation, the length of the "key" shape at the lower end corresponds to the ending position of the moving rod 522. Therefore, the length of the slide rail 525 at the lower end is less than the length of the slide rail 525 at the upper end. The width of the "key" shape is consistent with the diameter of the moving rod 522, so that the moving rod 522 slides linearly in the slide rail 525, thereby increasing the stability of the movement of the transmission assembly 5 under the influence of the water flow.

[0040] As shown in Figure 3 , Figure 4 , and Figure 6As shown, the booster block 53 includes a booster plate 531, a sliding pin 532, a linkage shaft 533, a storage groove and a cylindrical groove 535, the sliding pin 532 is installed at both ends of the booster plate 531, the booster plate 531 is rotationally installed on the linkage shaft 533, the storage groove and the cylindrical groove 535 are opened in the booster plate 531, the booster plate 531 is a rectangular plate that can rotate around the linkage shaft 533, two rectangular plates are rotationally installed on each rotating shaft, the two rotatable rectangular plates rotate under the push of the water flow to form the gap to expand the drum membrane 51, the rotation angle between the two booster plates 531 is limited to within 120° by the sliding pins 532 installed at the upper and lower ends, the sliding pins 532 are slidingly installed in the sliding groove 527 opened in the support cage 52, the angle limitation makes the movements of the three moving rods 522 not affect each other and prevents the rotation angle of the two booster plates 531 from being too large, thereby excessively stretching the drum membrane 51 and affecting the solid-liquid separation effect of the filter.

[0041] As shown in Figure 3 , the storage groove is a rectangular groove matched with the booster plate 531, the rectangular storage groove 534 allows the expandable part of the drum membrane 51 to be flatly stored, the upper and lower ends of the rectangular storage groove are symmetrically left with gaps with the upper and lower ends of the booster plate 531, so that the drum membrane 51 can be stretched into and out of the storage groove 534 from both ends, the end of the rectangular groove close to the linkage shaft 533 is left with a gap of one-fifth of the booster plate 531, the one-fifth gap allows the circular groove to be opened parallel to the linkage shaft 533, so that the clockwork 54 loaded with the drum membrane 51 can store as much drum membrane 51 as possible from the direction close to the linkage shaft 533, and the upper and lower ends of the storage groove are symmetrically distributed in the axis direction of the booster plate 531, so that the drum membrane 51 is stretched to form wrinkles at the center position of the booster plate 531, reducing the influence on the aperture of the drum membrane 51.

[0042] As shown in Figure 6 , the cylindrical groove 535 is symmetrically opened on one side of the storage groove, the circular groove is a cylindrical groove matched with the shape of the clockwork 54, and is symmetrically opened on one side of the storage groove 534 close to the linkage shaft 533, the clockwork 54 is horizontally installed in the circular groove, one end of the clockwork 54 is installed with the drum membrane 51, so that when the booster plate 531 is rotated by the water flow, the horizontal cross-sectional shape of the cylindrical groove 535 is a circular arc, the clockwork 54 shrunk into a ring shape in the cylindrical circular groove is stretched, thereby releasing the drum membrane 51 to form wrinkles, increasing the contact surface area with the water to be filtered, thereby improving the filtering effect.

[0043] As shown in Figure 3 , Figure 7 and Figure 8As shown, the drainage block 55 includes a drainage pipe 551, a water inlet passage 552, a vane 553, an opening control lever 554, a rotating pin 555, a gear 556 and a rack 557. The drainage pipe 551 is fixedly installed at the center of the support cage 52, so that the drainage pipe 551 is stable under pressure and connected with the annular array installed transmission assembly 5, thereby improving the stability of the drainage block 55 work. The drainage pipe 551 has an upper opening and a lower closed structure. The lower end of the drainage pipe 551 is closed to reduce the influence of the air pressure in the drainage pipe 551 on the water to be drained. The upper end of the drainage pipe 551 is designed to have an opening for draining the water to be drained after being lifted by the water pressure. The side of the drainage pipe 551 is provided with a plurality of water inlet passages 552, so that the filtered water from the inflatable membrane 51 enters the drainage pipe 551 from the side of the drainage pipe 551. The water inlet passage 552 is an arc-shaped through hole around the central axis of the drainage pipe 551. The arc-shaped through hole causes the filtered water to flow transversely at the water inlet passage 552, thereby forming a vortex to accelerate the filtered water into the drainage pipe 551 and reduce the backflow of the water to be drained through the water inlet passage 552. The diameter of the water inlet passage 552 gradually decreases towards the central axis of the drainage pipe 551. The gradually decreasing diameter is beneficial to the drainage pipe 551 to suck a large amount of filtered water from the large-diameter end under the action of water pressure and air pressure, reduce the air pressure in the drainage pipe 551, and accelerate the drainage of the water to be drained. One end of the vane 553 is installed at the upper end of the drainage pipe 551, and the other end of the vane 553 is installed with one end of the opening control lever 554. The other end of the opening control lever 554 is installed with the gear 556. The water inlet passage 552 designed around the central axis causes the filtered water to rapidly enter the drainage pipe 551 in the form of a rotating vortex, so that a negative pressure is generated around the drainage pipe 551, thereby forming a water pressure difference between the inside and outside of the inflatable membrane 51 and improving the filtering rate of the inflatable membrane 51 at the wrinkle.

[0044] As Figure 8 shown, the vane 553 has a triangular shape. The triangular structure has stability, and the rotating pin 555 rotates and fixes one corner of the vane 553. By swinging the other corner, the other two sides will move correspondingly. The structure is simple, and the edges of any triangular shape are "undulating". The "undulating" edges of the triangular shape are undulating, so that the edges are tightly combined when the vane 553 is closed, and the opening of the drainage pipe 551 is closed. When the vane 553 is driven, the undulating edges of the vane 553 make the opening of the outlet 4 more flexible. The length of the center line of the triangular shape is greater than the radius of the through hole of the drainage pipe 551, so that the through hole of the drainage pipe 551 is completely closed by the vane 553 when no drainage is needed. Therefore, the drainage block 55 can adjust the opening size of the drainage pipe 551 according to the water flow speed under the transmission of other transmission assemblies 5, thereby balancing the water pressure inside and outside the inflatable membrane 51 and improving the filtering effect and efficiency of the mechanism.

[0045] AsFigure 8 As shown in the figure, the two ends of the opening control rod 554 are two different sizes of circles in the horizontal cross section, and the circle connected with one end of the vane 553 is smaller than the circle connected with one end of the gear 556, so that the opening control rod 554 is driven by the large circle end to the small circle end, and due to the difference in radius between the large circle end and the small circle end, a greater torque can be generated at the small circle end to drive the vane 553 to rotate, so that the opening and closing of the opening control rod 554 to the vane 553 is more sensitive, the gear 556 is coaxially installed on the upper end of the drain pipe 551, the radius of the gear 556 is larger than the radius of the drain pipe 551, and the gear 556 is rotatably installed with the rack 557, so that the movement of the booster rod and the moving rod 522 is converted into the meshing rotation of the rack 557 and the gear 556, thereby driving the opening control rod 554 to rotate, and at the same time, the vane 553 is driven to open by the opening control rod 554, the air pressure in the drain pipe 551 is reduced, and the liquid flowing into the drain pipe 551 through the inlet water channel 552 is accelerated to be discharged under the action of the rising water pressure, so that the liquid in the drain pipe 551 is discharged.

[0046] As shown in the figure, Figure 9 The angle between the rack 557 and the support plate 523 is an acute angle, and the rack 557 keeps synchronous movement around the drain pipe 551, the acute angle converts the linear reciprocating movement of the three circumferentially arranged moving rods 522 into the synchronous rotation of the three racks 557 around the gear 556, the rotation of the gear 556 controls the opening size of the drain pipe 551, so that the movement of each component of the transmission assembly 5 is integrated, the movement of the booster block 53 caused by the influence of the water flow drives the movement of the drain block 55, and the solid-liquid separation work of the filter is completed.

[0047] As shown in the figure, Figure 10 When the water flow speed is normal and stable, the booster block 53 keeps stable movement in the sliding groove 527 of the support cage, the moving rod 522 keeps stable movement to drive the rotation of the gear 556 and the rack 557, the opening of the drain pipe 551 keeps a certain size to drain water, and the solid-liquid separation mechanism keeps stable movement to separate solid and liquid.

[0048] As shown in the figure, Figure 11 When the water flow speed is too large, the water flow drives the booster plate 531 to move towards the drain block 55, the stored drum membrane 51 is released to form a wrinkle, the contact surface area with the water to be filtered is increased, the moving rod 522 is driven to reach the limit position of movement, the gear 556 and the rack 557 are rotated, the opening of the drain pipe 551 is enlarged, the drainage is accelerated, and the filtering effect of solid-liquid separation is improved.

[0049] In the working process of the application, the liquid to be filtered flows into the cylinder 2 from the water inlet 3, is filtered through the drum membrane 51 covering around the transmission assembly 5, and the solid is separated outside the membrane, the filtered liquid enters the drum membrane 51, and is then pumped out from the water outlet 4 by the water pump above the drain block 55.

[0050] When the liquid to be filtered flows into the cylinder 2, because the upper end surface of the supporting cage 51 is in sealed connection with the inner surface of the cylinder 2 and the lower end surface of the supporting cage 51 is closed, the water flow can only enter from the periphery of the transmission assembly 5, so that the membrane inside and outside of the drum membrane 51 covering the periphery of the supporting cage 51 forms a hydraulic pressure difference, at the same time, the booster plate 531 connected with the moving rod 522 is pushed and slides in the sliding groove 527, the moving rod 522 is compressed by the elastic force generated after the compression spring 526 is compressed, and a part of the water flow back pressure is balanced, so that the position of the moving rod 522 remains unchanged at a certain water flow speed, and the drainage block 55 remains fixed to drain water at a certain opening size. When the water flow speed is too large, the booster plate 531 is pushed to move towards the drainage block 55, the drum membrane 51 stored in the storage groove 533 provided in the booster plate 531 and connected with the clockwork 54 is stretched and released, the folds are increased to increase the contact surface area with the water flow, and the influence of the water flow speed on the aperture of the drum membrane is reduced, thereby improving the solid-liquid separation effect. After the liquid to be filtered passes through the drum membrane 51, the solid deposits are filtered outside the drum membrane 51 or adsorbed on the outer surface of the drum membrane 51, and the filtered liquid enters the inner surface of the drum membrane 51 to form water pressure outside the drain pipe 551. Through the water inlet channel 552 which is horizontally provided around the central axis of the water outlet and whose aperture gradually decreases inward, a vortex is formed to accelerate the entry into the drain pipe 551. The T-shaped sliding block 524 connected with the moving rod 522 is driven to move towards the central axis of the drain pipe 551, thereby driving the rack 557 to move. The movement of the rack 557 drives the gear 556 to rotate, the rotation of the gear 556 drives the opening control rod 554 to rotate, the rotation of the opening control rod 554 drives the "triangular" blade 553 to swing at one angle. Under the cooperation of the "undulating" edge, the blade 553 is flexibly opened, the opening of the drain pipe 551 is increased, and the liquid to be drained continuously rises to the opening of the drain pipe 551, and then is sucked out by the water pump to flow out of the cylinder 2 from the water outlet 4, thereby realizing the whole process of solid-liquid separation. Therefore, when the water flow speed increases, the folds formed by the drum membrane 51 become larger, the contact surface area between the water to be filtered and the drum membrane 51 becomes larger, and the opening of the drain pipe 551 becomes larger, thereby completing the solid-liquid separation.

[0051] The description herein is provided to enable any person skilled in the art to practice or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the examples described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A solid-liquid separation mechanism for an expansion tube filter, comprising a fixed support (1), a cylinder (2), an inlet (3), and an outlet (4), wherein the cylinder (2) is mounted on the fixed support (1), and the inlet (3) and the outlet (4) are mounted on both sides of the cylinder (2), characterized in that, It also includes a transmission assembly (5), which is installed inside the cylinder (2). The diaphragm (51) covers the outside of the support cage (52) and is in contact with the liquid to be filtered. One end of the diaphragm (51) is connected to one end of the spring (54) and is stored in the booster block (53). When the water flow pushes the booster block (53) to rotate, the diaphragm (51) is stretched to form a pleated structure. The booster block (53) drives the moving rod (522) to make a linear movement towards the central axis of the drain block (55), thereby driving the movement of the rack (557) and gear (556) to control the opening size of the drain pipe (551) and discharge the filtered liquid.

2. The solid-liquid separation mechanism of the expansion tube filter according to claim 1, characterized in that: The transmission assembly (5) includes a diaphragm (51), a support cage (52), a booster block (53), a spring (54), and a drain block (55). The support cage (52) is installed at the center of the cylinder (2). The diaphragm (51) is installed on the outer surface of the support cage (52). One end of the booster block (53) is rotatably mounted on the support cage (52). The spring (54) is installed inside the booster block (53). The drain block (55) is installed at the central axis inside the support cage (52). The support cage (52) has springs (54) installed at both the upper and lower ends. The support plate (523) has a cage-like structure with several fixed rods (521) and three movable rods (522) arranged in a circular array on its side. The support cage (52) has six sliding grooves (527) arranged in a circular array on its upper and lower sides. A slide rail (525) is provided in the support plate (523). The movable rod (522) is slidably installed in the slide rail (525). One end of the compression spring (526) is engaged with one end of the slide rail (525), and the other end of the compression spring (526) is engaged with one side of the movable rod (522). A slider (524) is installed on the upper end of the movable rod (522).

3. The solid-liquid separation mechanism of the expansion tube filter according to claim 2, characterized in that: The slide rail (525) is key-shaped, and the length of the key-shaped section on the upper support plate (523) is greater than the length of the key-shaped section on the lower end. The width of the key-shaped section is the same as the diameter of the moving rod (522).

4. The solid-liquid separation mechanism of the expansion tube filter according to claim 2, characterized in that: The assist block (53) includes an assist plate (531), a sliding pin (532), a linkage shaft (533), a storage groove (534), and a cylindrical groove (535). The sliding pin (532) is installed at both ends of the assist plate (531). The assist plate (531) is rotatably mounted on the linkage shaft (533). The storage groove (534) and the cylindrical groove (535) are provided in the assist plate (531). The assist plate (531) is rectangular in shape, and the rotation angle between the two assist blocks (53) is limited to within 120°.

5. The solid-liquid separation mechanism of the expansion tube filter according to claim 4, characterized in that: The storage groove (534) is a rectangular groove that cooperates with the assist plate (531). The storage groove (534) is installed at one-fifth of the position of the assist plate (531) near the linkage shaft (533), and the upper and lower ends of the storage groove (534) are symmetrically distributed in the axial direction of the assist plate (531).

6. The solid-liquid separation mechanism of the expansion tube filter according to claim 5, characterized in that: The cylindrical groove (535) is symmetrically opened on one side of the storage groove (534), and the horizontal cross-sectional shape of the cylindrical groove (535) is an arc.

7. The solid-liquid separation mechanism of the expansion tube filter according to claim 2, characterized in that: The drainage block (55) includes a drainage pipe (551), a water inlet channel (552), a blade (553), an opening control rod (554), a rotating pin (555), a gear (556), and a rack (557). The drainage pipe (551) is fixedly installed at the center of the support cage (52). The drainage pipe (551) has a structure that is open at the top and closed at the bottom. The water inlet channel (552) is an arc-shaped through hole opened around the central axis of the drainage pipe (551). The diameter of the water inlet channel (552) gradually decreases towards the central axis of the drainage pipe (551). One end of the blade (553) is mounted on the upper end of the drainage pipe (551) by rotating pin (555). The other end of the blade (553) is mounted on one end of the opening control rod (554). The other end of the opening control rod (554) is mounted on the inner side of the gear (556). The gear (556) is rotatably mounted with a rack (557).

8. The solid-liquid separation mechanism of the expansion tube filter according to claim 7, characterized in that: The blade (553) is triangular in shape, with wavy sides, and the length of the center line of the triangular shape is greater than the radius of the through hole of the drain pipe (551).

9. The solid-liquid separation mechanism of the expansion tube filter according to claim 7, characterized in that: The two ends of the opening control rod (554) are two circles of different sizes in the horizontal cross-section direction. The circle connected to one end of the blade (553) is smaller than the circle connected to one end of the gear (556). The gear (556) is coaxially installed at the upper end of the drain pipe (551).

10. The solid-liquid separation mechanism of the expansion tube filter according to claim 7, characterized in that: The angle between the rack (557) and the support plate (523) is acute, and the rack (557) maintains synchronous movement around the drain pipe (551).

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