A lye filter

Abstract

The invention discloses an alkali liquid filter, which relates to the technical field of filters, and includes an outer cylinder, a rotating cylinder, a filter cylinder, a liquid inlet pipe, a liquid outlet pipe and a sewage discharge assembly. The rotating cylinder is rotatably connected in the outer cylinder, one end of which is fixedly connected to the mouth of the filter cylinder, and the other end is provided with a clean liquid port and a backwash port, a filter screen is arranged in the backwash port, and a notch is arranged on the rotating cylinder. An operating part is used to drive the rotating cylinder to rotate relative to the outer cylinder so that the rotating cylinder switches between a first station and a second station; in the first station, the liquid inlet pipe is connected to the notch and the liquid outlet pipe is connected to the clean liquid port; in the second station, the liquid inlet pipe is connected to the backwash port and the liquid outlet pipe is blocked by the end face of the rotating cylinder; an anti-fouling plate is fixedly connected to the liquid outlet pipe, and the anti-fouling plate blocks the backwash port when the rotating cylinder is in the first station, and the anti-fouling plate blocks the clean liquid port during the station switching process of the rotating cylinder. The invention realizes the cleanliness of the inside of the rotating cylinder and the inside of the filter cylinder during the switching between the filtering state and the backwashing state, and during the backwashing state.

Description

Technical Field

[0001] The invention relates to the technical field of filters, in particular to an alkali solution filter. Background Art

[0002] In the process of producing butadiene rubber, it is necessary to immerse butadiene rubber in an alkaline solution for alkaline washing, or spray alkaline solution on butadiene rubber through a nozzle for alkaline washing. Alkaline washing is to neutralize the residual acidic substances and improve the physical properties of the rubber. In the production process of butadiene rubber, there are solid impurities and debris on the surface, as well as accumulation of salt substances produced during the alkaline washing process. Therefore, the alkaline washing liquid needs to be treated for impurities after recovery.

[0003] The patent with announcement number CN209548825U discloses a backwash pre-filter, including a pre-bottle cap and a pre-bottle body, a bottle body bracket is inserted into the pre-bottle body, a first stopper is provided at the upper end of the bottle body bracket, a filter bracket is inserted into the bottle body bracket, the filter bracket is used to cover the filter, and the inner wall of the bottle body bracket and the outer wall of the filter bracket form a first water path; a filter bracket upper cover is fixedly provided at the upper end of the filter bracket, the filter bracket upper cover divides the pre-bottle body into an upper cavity and a lower cavity, the bottle body bracket is located in the lower cavity, and the filter bracket upper cover is provided with a first channel connecting the upper cavity and the first water path; the filter bracket upper cover is also provided with a second connecting pipe, a second stopper is provided on the second connecting pipe, and the inside of the filter bracket is connected to the second connecting pipe The channels are connected to form a second water channel; a water inlet port, a water outlet port and a first connecting pipe are provided on the front bottle cover; the water inlet port is connected to the upper cavity, the water outlet port is connected to the first connecting pipe, the first connecting pipe is sleeved on the second connecting pipe, and a second channel connecting the upper cavity and the second water channel is provided on the wall of the first connecting pipe; a sewage valve is fixedly provided at the lower end of the filter bracket, and a backwashing knob is provided on the sewage valve, and the backwashing knob is suitable for driving the sewage valve to move along the axis of the front bottle body or rotate around the axis of the front bottle body, thereby driving the upper cover of the filter bracket to move along the axis of the front bottle body or rotate around the axis of the front bottle body, so that the first stopper can block or open the first channel, and at the same time, the second stopper can open or block the second channel.

[0004] In the prior art such as the above patent, during backwashing, unfiltered liquid will enter the interior of the filter cartridge and pollute the interior of the filter cartridge, and a portion of the unfiltered liquid will directly flow to the water outlet port, causing pollution to the filtrate. Summary of the invention

[0005] The object of the present invention is to provide an alkaline solution filter to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an alkali liquid filter comprises an outer cylinder, a filter cylinder located in the outer cylinder, and a liquid inlet pipe, a liquid outlet pipe and a sewage discharge assembly arranged on the outer cylinder, and also comprises a rotating drum, an operating part and an anti-fouling plate, the rotating drum is rotatably connected in the outer cylinder, one end of the rotating drum is fixedly connected with the mouth of the filter cylinder, the other end of the rotating drum is provided with a clean liquid port and a backwash port connected to the inside of the rotating drum, and a notch connected to the inside of the outer cylinder is also provided, and a filter screen is provided in the backwash port; the operating part is used to drive the rotating drum to rotate relative to the outer cylinder so that the rotating drum switches between a first station and a second station; in the first station, the outlet of the liquid inlet pipe is connected with the notch and the inlet of the liquid outlet pipe is connected with the clean liquid port; in the second station, the inlet of the liquid inlet pipe is connected with the backwash port and the inlet of the liquid outlet pipe is blocked by the end face of the rotating drum; the anti-fouling plate is fixedly connected to the liquid outlet pipe, the anti-fouling plate blocks the backwash port when the rotating drum is in the first station, and the anti-fouling plate blocks the clean liquid port when the rotating drum is rotating from the first station to the second station.

[0007] Furthermore, the operating part includes a center rod and a knob. The center rod is dynamically sealed to the outer cylinder. The inner end of the center rod is fixedly connected to the rotating cylinder. The outer end is slidably connected to the knob along the length direction. The knob is fixedly connected to a positioning rod. The positioning rod can be respectively plugged into and matched with two positioning holes set on the end surface of the outer cylinder.

[0008] Furthermore, the anti-fouling plate is waist-shaped, and when the drum rotates from the first station to the second station, the anti-fouling plate is dynamically sealed to the clean liquid port.

[0009] Furthermore, the sewage discharge assembly includes a sewage discharge pipe connected to the outer cylinder and coaxially therewith, and a valve plug slidably connected along the axial direction of the sewage discharge pipe; when the rotating cylinder rotates from the first position to the second position, the valve plug slides from the closed position of closing the sewage discharge pipe to the sewage discharge position of opening the sewage discharge pipe.

[0010] Furthermore, it also includes an arc-shaped recoil booster plate, which is movably arranged in the filter cartridge. During the process of the rotating drum rotating from the first station to the second station, the recoil booster plate moves close to the inner wall of the filter cartridge; and during the sewage discharge process of the sewage pipe, the recoil booster plate rotates along the circumferential direction of the filter cartridge.

[0011] Furthermore, it also includes a locking mechanism, which includes: a shaft rod, which is respectively slidably and rotatably connected to the closed end of the filter cartridge and the outer cylinder, the valve plug is coaxially fixedly connected to the shaft rod, and the recoil booster plate is connected to the shaft rod by a telescopic rod arranged along the radial direction of the filter cartridge; a connecting rod, one end of which is rotatably connected to the recoil booster plate, and the other end is rotatably connected to a sleeve rotatably connected to the closed end of the filter cartridge, and the sleeve is slidably sleeved on the shaft rod; an elastic member, the process of restoring its deformation drives the recoil booster plate to move away from the inner wall of the filter cartridge; a wedge block, which is slidably connected to the closed end of the filter cartridge along the radial direction of the filter cartridge, and when the rotating drum rotates, the wedge block is driven to rotate through the filter cartridge, and the rotating wedge block slides with the inclined guide rail fixedly connected to the shaft rod, so that the wedge block approaches the axis center of the filter cartridge and slides and abuts with the conical body fixedly connected to the shaft rod, so that the shaft rod slides axially to drive the recoil booster plate to move close to the inner wall of the filter cartridge.

[0012] Furthermore, a propeller blade is coaxially fixedly connected to the shaft rod, and the propeller blade is located in the sewage pipe.

[0013] Furthermore, the elastic member is a torsion spring, which is movably sleeved on the rotating shaft between the connecting rod and the collar, with one end of the torsion spring fixedly connected to the connecting rod and the other end fixedly connected to the collar.

[0014] Furthermore, a coaxial end plate is fixedly embedded in the closed end of the filter cartridge, the shaft rod is dynamically sealed with the end plate, the wedge block is slidably connected to the guide block fixedly connected to the end plate, a sliding column is fixedly connected to the wedge block, the inclined guide rail is an inclined slide groove, the inclined slide groove is bent from a position away from the axis of the shaft rod to a position close to the axis of the shaft rod, and the slide column is movably arranged in the inclined slide groove and can slide along the inclined slide groove.

[0015] Furthermore, the filter cartridge is provided with reinforcing ribs.

[0016] Compared with the prior art, the alkaline liquid filter provided by the present invention can block the clean liquid port in the whole process of switching from the filtering state to the backwashing state by rotating the drum, thereby ensuring that the impurity liquid in the outer drum will not enter the drum from the clean liquid port in the whole process, thereby ensuring the cleanliness of the inside of the drum and the filter cartridge in the process of switching between the filtering state and the backwashing state; in the backwashing state, the impurity liquid is filtered by the filter screen when passing through the backwashing port from the liquid inlet pipe, and the clean filtrate enters the inside of the drum and the filter cartridge, thereby ensuring the cleanliness of the inside of the drum and the filter cartridge during the backwashing state. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the structure of the filter provided by the embodiment of the present invention Figure I ;

[0019] Figure 2 A schematic diagram of the structure of the filter provided by the embodiment of the present invention Figure II ;

[0020] Figure 3 A schematic diagram of the structure of the filter provided by the embodiment of the present invention Figure III ;

[0021] Figure 4 For along Figure 3 Plane section view of the midline BB;

[0022] Figure 5 For along Figure 3 Isometric section view of the center BB line;

[0023] Figure 6 For along Figure 2 Plane section view along line AA;

[0024] Figure 7 A schematic diagram of the structure inside the outer cylinder during filtration provided by an embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the connection structure between the anti-fouling plate and the liquid outlet pipe provided in an embodiment of the present invention;

[0026] Fig. 9 A schematic diagram of the connection structure between the recoil pressurization plate and the interlocking mechanism during filtration provided by an embodiment of the present invention;

[0027] Fig.10 A schematic diagram of the structure of sewage discharge provided by an embodiment of the present invention;

[0028] Fig.11 A schematic diagram of the structure of the backwash port and the liquid inlet pipe docking during sewage discharge provided by an embodiment of the present invention;

[0029] Fig.12 A plan cross-sectional view of sewage discharge provided by an embodiment of the present invention;

[0030] Fig.13 An isometric cross-sectional view of a sewage discharge according to an embodiment of the present invention;

[0031] Fig.14 A schematic diagram of the structure inside the outer cylinder during sewage discharge provided by an embodiment of the present invention;

[0032] Fig.15 A schematic diagram of the connection structure between the recoil booster plate and the interlocking mechanism during sewage discharge provided by an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Outer cylinder; 2. Filter cylinder; 21. End plate; 3. Liquid inlet pipe; 4. Liquid outlet pipe; 5. Drain assembly; 51. Drain pipe; 52. Valve plug; 6. Rotating cylinder; 61. Clean liquid port; 62. Recoil port; 63. Notch; 7. Filter screen; 8. Anti-fouling plate; 9. Operating unit; 91. Center rod; 92. Knob; 93. Positioning rod; 94. Positioning hole; 10. Recoil booster plate; 11. Interlocking mechanism; 111. Shaft rod; 112. Telescopic rod; 113. Connecting rod; 114. Ring; 115. Elastic member; 116. Guide block; 117. Wedge block; 118. Sliding column; 119. Inclined guide rail; 1110. Conical body; 12. Propeller blade. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] See also Figure 1-15 An alkali liquid filter provided by an embodiment of the present invention comprises an outer cylinder 1, a rotating cylinder 6 is rotatably connected inside the outer cylinder 1, one end of the rotating cylinder 6 is fixedly connected to the mouth of the filter cylinder 2, a reinforcing rib is arranged on the filter cylinder 2 to strengthen the strength of the filter cylinder 2, the outer cylinder 1 and the filter cylinder 2 are both located inside the outer cylinder 1, the outer cylinder 1, the rotating cylinder 6 and the filter cylinder 2 are coaxially arranged, a liquid inlet pipe 3 and a liquid outlet pipe 4 are arranged on the outer cylinder 1, a clean liquid port 61 and a backwash port 62 connected to the inside of the rotating cylinder 6 are opened on the other end of the rotating cylinder 6, and a connecting A notch 63 is formed inside the outer cylinder 1, and a filter screen 7 is arranged in the backwash port 62. A sewage discharge assembly 5 is also arranged on the outer cylinder 1. When the sewage discharge assembly 5 is opened, the liquid and filter residue in the outer cylinder 1 can be discharged. The sewage discharge assembly 5 includes a sewage discharge pipe 51 and a valve plug 52. The sewage discharge pipe 51 is fixedly connected to the outer cylinder 1, and the sewage discharge pipe 51 is coaxial with the outer cylinder 1. The valve plug 52 is axially slidable along the sewage discharge pipe 51. Therefore, the valve plug 52 has a closing position for closing the sewage discharge pipe 51, and a sewage discharge position for opening the sewage discharge pipe 51.

[0037] The operating part 9 is used to drive the rotating drum 6 to rotate relative to the outer drum 1 so that the rotating drum 6 can be switched between the first station and the second station. The operating part 9 can be a manual structure or an electric structure. It is required to be able to drive the rotating drum 6 to rotate and have the function of locking the rotating drum 6 in any of the first station and the second station. In one technical solution, the operating part 9 includes a center rod 91 and a knob 92. The center rod 91 is dynamically sealed with the outer drum 1. The inner end of the center rod 91 is fixedly connected to the rotating drum 6. The knob 92 is slidably connected to the outer end along the length direction. The knob 92 is fixedly connected to a positioning rod 93. The positioning rod 93 can be respectively plugged and matched with two positioning holes 94 provided on the end surface of the outer drum 1. When it is necessary to rotate the rotating drum 6, it is only necessary to pull the knob 92 upward to pull the positioning rod 93 out of the corresponding positioning hole 94 at this time, and then rotate the knob 92 to drive the rotating drum 6 to rotate through the center rod 91. After the rotating drum 6 rotates to the right position, the knob 92 is pressed downward to insert the positioning rod 93 into the corresponding positioning hole 94 at this time. Another technical solution is that the operating part 9 includes a servo motor fixedly mounted on the outer cylinder 1. The servo motor has a self-locking function. The shaft of the servo motor moves through the end surface of the outer cylinder 1 and is coaxially fixedly connected with the shaft. The forward and reverse rotation functions of the servo motor are used to realize the station switching of the rotating cylinder 6.

[0038] When the drum 6 is in the first position, the outlet of the liquid inlet pipe 3 is connected to the notch 63, and the inlet of the liquid outlet pipe 4 is connected to the clean liquid port 61. The direction of liquid filtration flow is: the liquid inlet pipe 3, the notch 63, the inside of the outer drum 1 (the outside of the filter drum 2 and the drum 6), the inside of the filter drum 2, the inside of the drum 6, the clean liquid port 61 and the liquid outlet pipe 4. Figure 4 When the drum 6 is in the second position, the inlet of the liquid inlet pipe 3 is connected to the backwash port 62 and the inlet of the liquid outlet pipe 4 is blocked by the end face of the drum 6. The direction of liquid filtration flow is: the liquid inlet pipe 3, the filter screen 7, the backwash port 62, the inside of the drum 6, the inside of the filter cartridge 2, the inside of the outer cylinder 1 (the outside of the filter cartridge 2 and the drum 6) and the sewage pipe 51. Fig.12 . During the process of the drum 6 rotating and switching from the first station to the second station, the valve plug 52 slides and switches from the closing station to the sewage discharge station. An anti-fouling plate 8 is fixedly connected to the liquid outlet pipe 4, and the anti-fouling plate 8 is tightly fitted with the end surface of the drum 6. When the drum 6 is in the first station, the anti-fouling plate 8 blocks the recoil port 62. When the drum 6 is rotating from the first station to the second station, the anti-fouling plate 8 blocks the clean liquid port 61. Specifically, the anti-fouling plate 8 is waist-shaped. When the drum 6 is rotating from the first station to the second station, the anti-fouling plate 8 and the clean liquid port 61 are dynamically sealed.

[0039] In the above technical solution, by rotating the drum 6, the filter state (such as Figure 1-7 , Fig. 9 ) Switch to backwash state (such as Figure 10-15), the anti-fouling plate 8 can block the clean liquid port 61 throughout the process, thereby ensuring that the impure liquid in the outer cylinder 1 will not enter the rotary drum 6 from the clean liquid port 61 throughout the process, and then ensuring the cleanliness of the inside of the rotary drum 6 and the filter cartridge 2 during the switching between the filtering state and the backwashing state; in the backwashing state, the impure liquid is filtered by the filter screen 7 when passing through the backwashing port 62 from the liquid inlet pipe 3, and the clean filtrate enters the inside of the rotary drum 6 and the filter cartridge 2, thereby ensuring the cleanliness of the inside of the rotary drum 6 and the filter cartridge 2 during the backwashing state.

[0040] In a further preferred technical solution of the present invention, a recoil boost plate 10 is movably arranged inside the filter cartridge 2. The recoil boost plate 10 is in an arc shape that matches the inner diameter of the filter cartridge 2. The recoil boost plate 10 and the filter cartridge 2 are installed and transmitted through a locking mechanism 11. During the process of the rotating drum 6 rotating from the first station to the second station, the recoil boost plate 10 moves to be close to the inner wall of the filter cartridge 2, and vice versa. Moreover, during the process of sewage discharge through the sewage pipe 51, the recoil boost plate 10 rotates along the circumferential direction of the filter cartridge 2, which is specifically achieved through the locking mechanism 11 and the propeller blades 12 and by utilizing the impact force of the liquid flowing through the sewage pipe 51. During filtering, the recoil booster plate 10 is away from the inner wall of the filter cartridge 2, and the entire filter cartridge 2 can allow liquid to flow through, maintaining the maximum filtering area; during backwashing, the recoil booster plate 10 is close to the inner wall of the filter cartridge 2, which is equivalent to closing and blocking a part of the filter holes of the filter cartridge 2, so that the part of the filter holes cannot flow liquid, thereby reducing the area of ​​liquid circulation on the filter cartridge 2, and then increasing the pressure when the liquid flows through the filter cartridge 2 against the blocked part, thereby improving the recoil effect; the recoil booster plate 10 rotates along the circumferential direction of the filter cartridge 2 to alternately block part of the filter holes of the filter cartridge 2, so that each filter hole on the filter cartridge 2 can be evenly backwashed.

[0041] The interlocking mechanism 11 includes a shaft rod 111, a connecting rod 113, an elastic member 115 and a wedge block 117. A coaxial end plate 21 is fixedly embedded in the closed end of the filter cartridge 2. The shaft rod 111 and the end plate 21 are slidably and rotatably connected. Specifically, a first through hole is opened at the center of the end plate 21, and a sealing ring is embedded on the inner wall of the first through hole. The shaft rod 111 is adapted to the first through hole and can pass through the first through hole. The shaft rod 111 is also slidably and rotatably connected to the outer cylinder 1. Specifically, an isolation sleeve is fixedly connected in the outer cylinder 1, and a second through hole is provided on the isolation sleeve. A sealing ring is embedded on the inner wall of the second through hole. The shaft rod 111 is adapted to the second through hole and can pass through the second through hole. The shaft 111 is coaxially fixedly connected to the valve plug 52, and the axial movement of the valve plug 52 relative to the sewage pipe 51 is realized by the movement of the shaft 111. The recoil booster plate 10 is connected to the shaft 111 through a telescopic rod 112 arranged radially along the filter cartridge 2. One end of the connecting rod 113 is rotatably connected to the recoil booster plate 10, and the other end is rotatably connected to a ring 114 rotatably connected to the closed end of the filter cartridge 2. The ring 114 is slidably sleeved on the shaft 111.

[0042] There are many specific configurations of the elastic member 115, which require ensuring that the elastic member 115 recovers its deformation process to drive the recoil booster plate 10 to move away from the inner wall of the filter cartridge 2. For example, the elastic member 115 is a torsion spring, which is movably sleeved on the rotating shaft between the connecting rod 113 and the collar 114, with one end of the torsion spring fixedly connected to the connecting rod 113 and the other end fixedly connected to the collar 114; another example is a tension spring sleeved on the telescopic rod 112, with both ends of the tension spring connected to both ends of the telescopic rod 112, and the elastic force of the tension spring keeps the telescopic rod 112 in a contraction trend. The elastic member 115 has another function that its elastic force can make the shaft 111 have a force to move toward the rotating drum 6 relative to the collar 114, so that the conical valve plug 52 fixed on the shaft 111 is tightly blocked at the mouth of the sewage pipe 51, so that the valve plug 52 is kept in the closed position of the sewage pipe 51, and the valve plug 52 is automatically closed to the sewage pipe 51.

[0043] The wedge block 117 is connected to the guide block 116 along the radial direction of the filter cartridge 2 by sliding, and the guide block 116 is fixedly connected to the end plate 21, that is, there is a sliding structure between the wedge block 117 and the guide block 116, such as the cooperation of the slider and the slide groove, and the wedge block 117 is fixedly connected with a slide post 118. When the drum 6 rotates, the wedge block 117 is driven to rotate through the filter cartridge 2, and the rotating wedge block 117 is slidably matched with the inclined guide rail 119 fixedly connected to the shaft rod 111. The inclined guide rail 119 can be an inclined slide groove, which is bent from a position away from the axis of the shaft rod 111 to a position close to the axis of the shaft rod 111, and the slide post 118 is movably arranged in the inclined slide groove and can slide along the inclined slide groove. The wedge block 117 is close to the axis of the filter cartridge 2 and is slidably abutted with the conical body 1110 fixedly connected to the shaft rod 111, so that the shaft rod 111 slides axially to drive the recoil booster plate 10 to move close to the inner wall of the filter cartridge 2. The shaft 111 is coaxially fixedly connected with a propeller blade 12 , and the propeller blade 12 is located in the sewage pipe 51 .

[0044] In the above technical solution, when the drum 6 is in the first position, i.e., the filtering state, the recoil booster plate 10 is away from the inner wall of the filter cartridge 2 under the elastic force of the elastic member 115. At this time, the liquid in the outer cylinder 1 can flow into the filter cartridge 2 from all parts of the filter cartridge 2, and the entire filter cartridge 2 can play a filtering role. The telescopic rod 112 of the interlocking mechanism 11 is in a contracted state, the valve plug 52 fixed to the shaft rod 111 is in a closed position to close the sewage pipe 51, the slide column 118 is at the end of the inclined slide groove away from the shaft rod 111, and the valve plug 52 is in a closed position to close the sewage pipe 51. Figure 4-5 , Fig. 9During the process of the drum 6 rotating from the first station to the second station, the rotation of the drum 6 drives the filter screen 7 and the wedge block 117 to rotate together. The sliding column 118 on the wedge block 117 slides with the inclined slide groove, so that the wedge block 117 gradually approaches the shaft rod 111 during the process of rotating around the shaft rod 111, that is, the wedge block 117 also slides with the guide block 116, and the inclined surface of the wedge block 117 squeezes the conical body 1110 fixedly connected to the shaft rod 111, so that the conical body 1110 moves away from the filter cartridge 2, and the conical body 1110 drives the shaft rod 111 The shaft 111 moves together, so that on the one hand, the shaft 111 drives the valve plug 52 to leave the closing position to the sewage discharge position, and on the other hand, the shaft 111 overcomes the elastic force of the elastic member 115 to pull the telescopic rod 112, and the telescopic rod 112 drives the recoil booster plate 10 to move together, and the angle between the connecting rod 113 and the shaft 111 increases and the telescopic rod 112 stretches, so that the recoil booster plate 10 moves close to the inner wall of the filter cartridge 2, covering a part of the filter holes of the filter cartridge 2, increasing the liquid pressure flowing through the filter cartridge 2 during backwashing, so that the filter cartridge 2 is backwashed more fully, such as Figure 12-13 , Fig.15 After the backwashing is completed, the drum 6 is rotated from the second station back to the first station through the operating part 9, driving the wedge block 117 and the slide post 118 to reverse and reset, and the slide post 118 moves to the end of the inclined slot away from the center rod 91. The inclined surface of the wedge block 117 loses the squeezing effect on the cone 1110, and the elastic force of the elastic member 115 is released, so that the shaft 111 moves toward the drum 6, thereby driving the valve plug 52 to close the sewage pipe 51, and driving the recoil booster plate 10 away from the inner wall of the filter cartridge 2, so that the entire filter cartridge 2 can flow liquid again.

[0045] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An alkaline liquid filter, comprising an outer cylinder (1), a filter cylinder (2) located in the outer cylinder (1), and a liquid inlet pipe (3), a liquid outlet pipe (4) and a sewage discharge assembly (5) arranged on the outer cylinder (1), characterized in that: Also includes: A rotary drum (6) is rotatably connected in the outer drum (1); one end of the rotary drum (6) is fixedly connected to the mouth of the filter drum (2); the other end of the rotary drum (6) is provided with a clean liquid port (61) and a backwash port (62) connected to the interior of the rotary drum (6); a filter screen (7) is provided in the backwash port (62); and a notch (63) connected to the interior of the outer drum (1) is also provided on the rotary drum (6); an operating portion (9) for driving the rotating drum (6) to rotate relative to the outer drum (1) so that the rotating drum (6) switches between a first position and a second position; in the first position, the liquid inlet pipe (3) is connected to the notch (63) and the liquid outlet pipe (4) is connected to the liquid cleaning port (61); in the second position, the liquid inlet pipe (3) is connected to the backwash port (62) and the liquid outlet pipe (4) is blocked by the end face of the rotating drum (6); an anti-fouling plate (8) fixedly connected to the liquid outlet pipe (4); the anti-fouling plate (8) blocks the recoil opening (62) when the rotating drum (6) is in the first working position; and the anti-fouling plate (8) blocks the clean liquid opening (61) when the rotating drum (6) is rotating from the first working position to the second working position; The sewage discharge assembly (5) comprises a sewage discharge pipe (51) which is connected to the outer cylinder (1) and is coaxial with the outer cylinder (1), and a valve plug (52) which is slidably connected along the axial direction of the sewage discharge pipe (51); when the rotating cylinder (6) is rotated from the first position to the second position, the valve plug (52) is slidably switched from the closed position for closing the sewage discharge pipe (51) to the sewage discharge position for opening the sewage discharge pipe (51); It also includes an arc-shaped recoil boost plate (10), which is movably arranged in the filter cartridge (2). When the rotating drum (6) is rotated from the first working position to the second working position, the recoil boost plate (10) moves to be close to the inner wall of the filter cartridge (2); and when the sewage is discharged through the sewage discharge pipe (51), the recoil boost plate (10) rotates along the circumferential direction of the filter cartridge (2); It also includes a chain mechanism (11), and the chain mechanism (11) includes: A shaft (111) is slidably and rotatably connected to the closed end of the filter cartridge (2) and the outer cartridge (1), respectively; the valve plug (52) is coaxially fixedly connected to the shaft (111); and the recoil booster plate (10) is connected to the shaft (111) via a telescopic rod (112) radially arranged along the filter cartridge (2); A connecting rod (113), one end of which is rotatably connected to the recoil booster plate (10), and the other end of which is rotatably connected to a collar (114) rotatably connected to the closed end of the filter cartridge (2), wherein the collar (114) is slidably sleeved on the shaft (111); The elastic member (115) causes the recoil booster plate (10) to move away from the inner wall of the filter cartridge (2) during the process of restoring its deformation; A wedge block (117) is slidably connected to the closed end of the filter cartridge (2) along the radial direction of the filter cartridge (2). When the rotating drum (6) rotates, the wedge block (117) is driven to rotate through the filter cartridge (2). The rotating wedge block (117) is slidably matched with an inclined guide rail (119) fixedly connected to the shaft rod (111), so that the wedge block (117) approaches the axis of the filter cartridge (2) and slidably abuts against a conical body (1110) fixedly connected to the shaft rod (111), so that the shaft rod (111) slides in the axial direction to drive the recoil booster plate (10) to move close to the inner wall of the filter cartridge (2); A coaxial end plate (21) is fixedly embedded in the closed end of the filter cartridge (2); the shaft (111) is dynamically sealedly connected to the end plate (21); a wedge block (117) is slidably connected to a guide block (116) fixedly connected to the end plate (21); a slide column (118) is fixedly connected to the wedge block (117); the inclined guide rail (119) is an inclined slide groove, the inclined slide groove is bent from a position away from the axis of the shaft (111) to a position close to the axis of the shaft (111); the slide column (118) is movably arranged in the inclined slide groove and can slide along the inclined slide groove; During filtering, the recoil booster plate (10) is away from the inner wall of the filter cartridge (2), and the entire filter cartridge (2) can allow liquid to flow through, thereby maintaining a maximum filtering area; during backwashing, the recoil booster plate (10) is close to the inner wall of the filter cartridge (2) to close and block part of the filter holes of the filter cartridge (2), so that the part of the filter holes cannot flow liquid, thereby reducing the area of ​​liquid circulation on the filter cartridge (2), thereby increasing the pressure when the liquid flows through the unblocked part of the filter cartridge (2) to improve the recoil effect; the recoil booster plate (10) rotates along the circumferential direction of the filter cartridge (2) to alternately block part of the filter holes of the filter cartridge (2), so that each filter hole on the filter cartridge (2) can be evenly backwashed.

2. The alkali solution filter according to claim 1, characterized in that: The operating portion (9) comprises a center rod (91) and a knob (92); the center rod (91) is dynamically sealed to the outer cylinder (1); the inner end of the center rod (91) is fixedly connected to the rotating cylinder (6); the outer end is slidably connected to the knob (92) along the length direction; the knob (92) is fixedly connected to a positioning rod (93); the positioning rod (93) can be respectively plugged into two positioning holes (94) provided on the end surface of the outer cylinder (1).

3. The alkali liquid filter according to claim 1, characterized in that: The anti-fouling plate (8) is waist-shaped, and when the rotating drum (6) is rotating from the first working position to the second working position, the anti-fouling plate (8) is dynamically sealed to the clean liquid port (61).

4. The alkali solution filter according to claim 1, characterized in that: The shaft (111) is coaxially and fixedly connected with a propeller blade (12), and the propeller blade (12) is located in the sewage pipe (51).

5. The alkali liquid filter according to claim 1, characterized in that: The elastic member (115) is a torsion spring, which is movably sleeved on the rotating shaft between the connecting rod (113) and the sleeve ring (114), one end of the torsion spring is fixedly connected to the connecting rod (113), and the other end is fixedly connected to the sleeve ring (114).

6. The alkali solution filter according to claim 1, characterized in that: The filter cartridge (2) is provided with reinforcing ribs.

Images