A dynamic filtration and retention rate tester

Abstract

The application discloses a dynamic filterability and retention rate tester and relates to the technical field of paper sheet forming equipment. The dynamic filterability and retention rate tester comprises a machine base, a receiving groove arranged on the machine base, a rotating mechanism arranged in the machine base, a rotating end of the rotating mechanism extending into the receiving groove, a filter cylinder arranged at the top end of the receiving groove and detachably connected with the machine base, a rotating end of the rotating mechanism located in the filter cylinder, a first stirring rotor or a second stirring rotor arranged in the filter cylinder and rotationally connected with the rotating end of the rotating mechanism, and the first stirring rotor or the second stirring rotor seals a discharging port of the filter cylinder. A receiving cylinder is arranged on the receiving groove and located below the filter cylinder, and the discharging port of the filter cylinder faces a feeding port of the receiving cylinder. The dynamic filterability and retention rate tester can be used to measure filterability or retention rate according to measurement requirements, the application range of the tester is widened, and the equipment investment cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of paper forming equipment technology, and in particular to a dynamic water filtration and retention rate measuring instrument. Background Technology

[0002] Paper sheet formation is the most crucial process in papermaking. During this process, on the one hand, the fine fibers and added chemicals in the pulp must be retained as much as possible to ensure improved fiber utilization and reduced circulating white water load within the system. On the other hand, the pulp needs to possess good water filtration properties to ensure the stability of paper sheet formation.

[0003] Therefore, in the paper industry, it is necessary to simulate the production conditions of papermaking machines in the laboratory, test the water-filtering performance of pulp, and evaluate the dynamic retention rate of papermaking chemicals, so as to determine whether the pulp meets the water-filtering and retention rate standards required for papermaking.

[0004] Existing tests for dynamic retention and filterability of pulp liquor require the use of different equipment. This increases both the time required to complete both tests on the same pulp liquor, raising the time cost, and the cost of laboratory equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a dynamic filterability and retention rate tester, which can measure filterability or retention rate according to measurement requirements, thereby improving measurement efficiency, expanding the applicability of the tester, and reducing equipment investment costs.

[0006] To achieve the above objectives, the present invention provides a dynamic filtration and retention rate measuring instrument, the specific implementation of which is as follows:

[0007] A dynamic filterability and retention rate measuring instrument, comprising:

[0008] Base;

[0009] A receiving trough is provided on the machine base;

[0010] A rotating mechanism is located inside the machine base, with the rotating end of the rotating mechanism extending into the receiving trough;

[0011] A filter media cylinder is located at the top of the receiving trough and is detachably connected to the machine base. The rotating end of the rotating mechanism is located inside the filter media cylinder.

[0012] A first stirring rotor or a second stirring rotor is disposed inside the filter media cylinder and is rotatably connected to the rotating end of the rotating mechanism, and the first stirring rotor or the second stirring rotor seals the outlet of the filter media cylinder;

[0013] The receiving cylinder is placed on the receiving trough, located below the filter cylinder, with the outlet of the filter cylinder facing the receiving port of the receiving cylinder.

[0014] The present invention provides a dynamic filtration and retention rate tester. Compared with the prior art, it provides a rotating mechanism in the base, with the rotating end of the rotating mechanism extending through the base into a receiving groove. A detachable filter media cylinder in the receiving groove covers the rotating end of the rotating mechanism inside the filter media cylinder, so that the rotating end of the rotating mechanism can be connected to a replaceable first stirring rotor or second stirring rotor. The first stirring rotor or second stirring rotor seals the outlet of the filter media cylinder, and a receiving cylinder is provided at the bottom of the receiving groove, with the receiving port of the receiving cylinder facing the outlet of the filter media cylinder.

[0015] In use, on the one hand, a first or second stirring rotor with an unsealed outlet of the filter cylinder can be selected. In this case, the pulp entering the filter cylinder is stirred by the first or second stirring rotor and falls into the receiving cylinder through the outlet. The retention rate of the pulp is calculated by comparing the mass of the pulp entering the filter cylinder and the mass of the pulp on the receiving cylinder. On the other hand, a second or first stirring rotor with a sealable outlet of the filter cylinder can be selected. In this case, the pulp entering the filter cylinder is stirred by the first or second stirring rotor and then allowed to settle before the outlet of the filter cylinder is opened, allowing the pulp to fall into the receiving cylinder. The water permeability of the pulp is calculated based on the curve of the pulp's water permeability versus time. The water permeability and retention rate of pulp can be measured using the same testing instrument, effectively improving the applicability of the testing instrument and reducing equipment investment costs.

[0016] In some embodiments, the following are included:

[0017] Multiple turbulence baffles are provided and are detachably mounted on the inner peripheral wall of the filter media cylinder;

[0018] A snap-fit ​​groove is provided on the inner wall of the filter media cylinder. The turbulence baffle is inserted into the snap-fit ​​groove, and the plurality of turbulence baffles are arranged in a ring array along the axial direction of the filter media cylinder.

[0019] By installing turbulence baffles on the inner circumferential wall of the filter media cylinder, the turbulence baffles collide with the slurry when the first or second stirring rotor rotates inside the filter media cylinder, creating turbulence. This makes the slurry more uniform under the stirring action of the first or second stirring rotor, improving the retention rate of the slurry and the accuracy and stability of the water-filtering performance test. Furthermore, the turbulence baffles are designed to be detachable, reducing the structural complexity and manufacturing cost of the filter media cylinder. The turbulence baffles can also be replaced individually after damage, further reducing cost investment.

[0020] In some embodiments, the following are included:

[0021] The first connecting hole is opened at the top of the first stirring rotor, and the rotating end of the rotating mechanism is inserted into the first connecting hole;

[0022] The first stirring element is fitted onto the bottom end of the first stirring rotor;

[0023] At least one first stirring rod is provided on the outer wall of the first stirring member.

[0024] The transmission connection between the first stirring rotor and the rotating mechanism is achieved by inserting the first connecting hole into the rotating end of the rotating mechanism, which reduces the complexity of the structure, improves the ease of disassembly and assembly of the first stirring rotor, and facilitates the replacement of the first stirring rotor with the second stirring rotor. The stirring function of the first stirring rotor is achieved by using a first stirring component with a first stirring rod. The first stirring component can be disassembled and assembled according to the usage requirements, and the first stirring component can also be replaced separately according to the damage, thereby reducing the equipment maintenance cost.

[0025] In some embodiments, the following are included:

[0026] The second connecting hole is opened at the top of the second stirring rotor, and the rotating end of the rotating mechanism is inserted into the second connecting hole;

[0027] At least one second stirring rod is provided on the outer wall of the second stirring rotor;

[0028] A conical sealing disc is fitted onto the bottom end of the connecting rod and can rotate relative to the connecting rod;

[0029] A sealing ring is provided at the bottom end of the conical sealing disc. The bottom end of the sealing ring abuts against the outer peripheral wall of the filter media cylinder to seal the outlet of the filter media cylinder.

[0030] Multiple baffles are provided on the outer peripheral wall of the conical sealing disc and arranged in a ring array along the axial direction of the second stirring rotor.

[0031] The transmission connection between the second stirring rotor and the rotating mechanism is achieved by inserting the second connecting hole into the rotating end of the rotating mechanism, which reduces the complexity of the structure, improves the ease of disassembly and assembly of the second stirring rotor, facilitates the replacement of the first stirring rotor with the second stirring rotor, and seals the outlet of the filter media when the second stirring rotor rotates inside the filter media cylinder by setting a conical sealing cover. The second stirring rod, together with the baffle and turbulence baffle, achieves full mixing of the slurry, improving the accuracy and stability of the slurry's filterability test.

[0032] In some embodiments, the following are included:

[0033] The first mounting hole is formed on the outer wall of the filter media cylinder and matches the limiting groove.

[0034] A first limiting rod is disposed in the first mounting hole, and the end of the first limiting rod extends into the filter media cylinder through the first mounting hole.

[0035] A fixed sleeve is fixed to the top wall of the receiving groove, and the rotating end of the rotating mechanism extends through the fixed sleeve into the receiving groove.

[0036] The limiting groove is provided in at least two parts, and is provided on the inner peripheral wall of the fixing sleeve;

[0037] The first through groove is formed at the bottom end of the fixed sleeve, and connects to the limiting groove. The filter media cylinder is sleeved on the fixed sleeve. The first limiting rod passes through the first through groove and is embedded in the limiting groove, and is limited and engaged with the limiting groove.

[0038] By setting a fixing sleeve on the top wall of the receiving trough, a limiting groove is set on the inner wall of the fixing sleeve, and a first through groove is set at the bottom of the limiting groove. A first mounting hole that mates with the limiting groove is set at the top of the filter media cylinder, and a first limiting rod is set in the first mounting hole. The first limiting rod passes through the first through groove and enters the limiting groove. By rotating the filter media cylinder, the first limiting rod is driven into the limiting groove, offsetting the first through groove. This achieves a detachable connection between the filter media cylinder and the top wall of the receiving trough. The structure is simple and easy to assemble and disassemble, effectively improving the ease of assembly and disassembly of the filter media cylinder.

[0039] In some embodiments, the following are included:

[0040] The first connecting sleeve is located at the top of the filter media cylinder and is fitted onto the fixing sleeve. The first connecting hole is formed on the first connecting sleeve.

[0041] The second connecting sleeve is located at the bottom end of the filter media cylinder;

[0042] The first insertion groove is formed at the bottom end of the first connecting sleeve;

[0043] The second insertion groove is formed at the top of the second connecting sleeve;

[0044] The first sealing element is fitted into the first fitting groove, the top end of the filter media tube is inserted into the first fitting groove, and the top end of the filter media tube presses against the first sealing element.

[0045] The second sealing element is fitted into the second fitting groove, and the bottom end of the filter media tube is inserted into the second fitting groove, and the bottom end of the filter media tube presses against the second sealing element.

[0046] By setting a first connecting sleeve at the top of the filter media cartridge and a second connecting sleeve at the bottom, the filter media cartridge is fixed by embedding the top of the filter media cartridge into the first groove of the first connecting sleeve and the bottom of the filter media cartridge into the second groove of the second connecting sleeve. At the same time, the connection is sealed by a first sealing element and a second sealing element, which reduces the manufacturing difficulty of the filter media cartridge and thus reduces manufacturing and maintenance costs.

[0047] In some embodiments, the following are included:

[0048] A sealing cover is provided at the bottom end of the second connecting sleeve;

[0049] The filter media tube is located at the bottom end of the sealing cover and extends towards the receiving cylinder;

[0050] The filter media holes are formed on the filter media tube, penetrate the filter media tube, and the top of the filter media holes passes through the sealing cover to conduct to the filter media cylinder;

[0051] A switching valve is provided on the filter media tube, and the switching end of the switching valve extends into the filter media hole.

[0052] By setting a sealing cover at the bottom of the second connecting sleeve, and a filter media tube at the bottom of the sealing cover, and setting filter media holes and a switch valve with a switch end extending into the filter media holes on the filter media tube, the filter media holes can be opened or closed by opening or closing the filter media holes through the switch valve, thereby improving the controllability of slurry discharge.

[0053] In some embodiments, the following are included:

[0054] The feed component is located at the top of the machine base;

[0055] The feed inlet is located on the feed member and passes through the feed member;

[0056] A feed pipe is located at the bottom end of the feed component, which is connected to the feed inlet, and the bottom end of the feed pipe passes through the machine base and the fixing sleeve and extends into the filter cylinder.

[0057] By setting a feeding component at the top of the machine base, the inlet of the feeding component is located above the top of the machine base. The feeding pipe at the bottom passes through the machine base and the fixing sleeve and extends into the filter cylinder, so that the slurry can be poured into the filter cylinder through the feeding port at the top of the machine base and fed into the filter cylinder through the feeding pipe. The structure is simple and easy to use, further simplifying the complexity of the structure.

[0058] In some embodiments, the following are included:

[0059] A receiving groove is formed inside the machine base, and a rotating mechanism is disposed inside the receiving groove. The rotating mechanism includes a rotating motor and a transmission rod. The rotating motor is fixed inside the receiving groove, and the transmission rod is the rotating end of the rotating mechanism.

[0060] The drive turntable is sleeved on the motor shaft of the rotating motor;

[0061] A driven turntable is sleeved on the top end of the transmission rod, and the bottom end of the transmission rod passes through the machine base and extends into the filter cylinder, where it is connected to the first stirring rotor or the second stirring rotor.

[0062] A transmission belt is disposed in the receiving groove, with one end sleeved on the driving turntable and the other end sleeved on the driven turntable, and is respectively connected to the rotating motor and the transmission rod for transmission.

[0063] By using a rotating motor to drive the turntable to rotate, which in turn drives the transmission belt to rotate, and the transmission belt drives the driven turntable to rotate, which in turn drives the transmission rod to rotate. This causes the first or second stirring rotor connected to the transmission rod to rotate under the drive of the transmission rod, thus stirring the slurry in the filter cylinder. The structure is simple, easy to use, and reduces the manufacturing cost of the equipment.

[0064] In some embodiments, the following are included:

[0065] A mounting plate is fixedly disposed in the receiving groove. The rotating motor and the transmission rod are both disposed at the bottom end of the mounting plate. The motor shaft of the rotating motor and the top end of the transmission rod both pass through the mounting plate and extend to the top end of the mounting plate.

[0066] A connecting post is fixedly disposed in the receiving groove, located below the mounting plate, with its top end passing through the mounting plate and extending above the mounting plate;

[0067] The tensioning turntable is rotatably mounted on the top of the connecting column and is detachably connected to the connecting column. It is located between the driving turntable and the driven turntable, and part of the transmission belt is mounted on the tensioning turntable.

[0068] By fixing an installation plate in the receiving groove of the base, and setting a connecting post on the installation plate, a tensioning turntable connected to the transmission belt is sleeved on the top of the connecting post. During use, the tension of the transmission belt can be adjusted by adjusting the installation position of the connecting post or adjusting the size of the tensioning turntable, thereby improving the service life of the transmission belt.

[0069] Based on the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0070] By setting a rotating mechanism inside the machine base, the rotating end of the rotating mechanism extends through the machine base into the receiving groove opened in the machine base. The detachable filter media cylinder inside the receiving groove covers the rotating end of the rotating mechanism inside the filter media cylinder, so that the rotating end of the rotating mechanism can be interchangeably connected to the first stirring rotor or the second stirring rotor. The first stirring rotor or the first stirring rotor seals the outlet of the filter media cylinder, and a receiving cylinder is set at the bottom of the receiving groove, with the inlet of the receiving cylinder facing the outlet of the filter media cylinder.

[0071] In use, on the one hand, a first or second stirring rotor with an unsealed outlet of the filter cylinder can be selected. In this case, the pulp entering the filter cylinder is stirred by the first or second stirring rotor and falls into the receiving cylinder through the outlet. The retention rate of the pulp is calculated by comparing the mass of the pulp entering the filter cylinder and the mass of the pulp on the receiving cylinder. On the other hand, a second or first stirring rotor with a sealable outlet of the filter cylinder can be selected. In this case, the pulp entering the filter cylinder is stirred by the first or second stirring rotor and then allowed to settle before the outlet of the filter cylinder is opened, allowing the pulp to fall into the receiving cylinder. The water permeability of the pulp is calculated based on the curve of the pulp's water permeability versus time. The water permeability and retention rate of pulp can be measured using the same testing instrument, effectively improving the applicability of the testing instrument and reducing equipment investment costs. Attached Figure Description

[0072] Figure 1 This is a schematic diagram of the structure of the present invention;

[0073] Figure 2 This is a cross-sectional view of the present invention using a first stirring rotor;

[0074] Figure 3 This is a cross-sectional view of the present invention employing a second stirring rotor;

[0075] Figure 4 This is a schematic diagram of the first stirring rotor of the present invention;

[0076] Figure 5 This is a schematic diagram of the second stirring rotor of the present invention;

[0077] Figure 6 This is an exploded view of the present invention.

[0078] Explanation of reference numerals in the attached figures:

[0079] 1. Base; 101. Receiving groove; 102. Mounting plate; 103. Mounting column; 104. Connecting column; 105. Tensioning turntable; 106. Fixing sleeve; 1061. Limiting groove; 1062. First through groove; 107. Receiving groove; 108. Insertion port; 109. Control switch;

[0080] 2. Rotating mechanism; 21. Rotating motor; 22. Driven turntable; 23. Transmission belt; 24. Driven turntable; 25. Transmission rod;

[0081] 3. Filter media cartridge; 31. Feeding component; 311. Feed inlet; 312. Feeding pipe; 32. First connecting sleeve; 321. First mounting hole; 322. First interlocking groove; 323. First sealing element; 324. First limiting rod; 33. Second connecting sleeve; 331. Second interlocking groove; 332. Second sealing element; 333. Snap-fit ​​groove; 34. Turbulence baffle; 35. Discharge port; 36. Sealing cover; 37. Filter media pipe; 371. Filter media hole; 38. Switch valve;

[0082] 4. Receiving cylinder;

[0083] 5. First stirring rotor; 51. First connecting hole; 52. First stirring element; 53. First stirring rod;

[0084] 6. Second stirring rotor; 61. Second connecting hole; 62. Second stirring rod; 63. Connecting rod; 64. Conical sealing disc; 65. Sealing ring; 66. Baffle plate;

[0085] 71. Touchpad; 72. Control circuit board. Detailed Implementation

[0086] The present invention provides a dynamic water filtration and retention rate measuring instrument, illustrated in conjunction with the accompanying drawings.

[0087] like Figures 1 to 6 As shown, the dynamic filtration and retention rate tester provided in this embodiment includes a base 1, a receiving groove 101 inside the base 1, a rotating mechanism 2 inside the receiving groove 101, a receiving groove 107 on either side of the base 1, a receiving cylinder 4 placed at the bottom of the receiving groove 107, and a detachable filter cylinder 3 connected to the top. The outlet 35 of the filter cylinder 3 faces the receiving port of the receiving cylinder 4. The rotating end of the rotating mechanism 2 passes through the base 1 and extends into the filter cylinder 3 to connect to a first stirring rotor 5 or a second stirring rotor 6. The first stirring rotor 5 or the second stirring rotor 6 seals the outlet 35 of the filter cylinder 3, thereby realizing the retention rate and filtration of the slurry entering the filter cylinder 3.

[0088] At least two mounting posts 103 are provided in the receiving groove 101, preferably three in this embodiment. A mounting plate 102 is fixed on the mounting post 103, and the rotating mechanism 2 is provided on the mounting plate 102. Specifically, the rotating mechanism 2 includes a rotating motor 21 and a transmission rod 25. The rotating motor 21 and the transmission rod 25 are both located at the bottom end of the mounting plate 102. The rotating motor 21 is located on the side opposite to the receiving groove 107, and the motor shaft of the rotating motor 21 rotatably passes through the mounting plate 102 and extends to the mounting plate. Above 102, the top end of the transmission rod 25 rotatably passes through the mounting plate 102 and extends above the mounting plate 102. A drive turntable 22 is sleeved on the motor shaft of the rotating motor 21, and a driven turntable 24 is sleeved on the top end of the transmission rod 25. A transmission belt 23 is also included to drive the drive turntable 22 and the driven turntable 24 to connect them, so that the rotating motor 21 can drive the transmission rod 25 to rotate when it operates. The transmission rod 25 is the rotating end of the rotating mechanism 2, and its bottom end passes through the base 1 and extends into the filter cylinder 3.

[0089] Specifically, a connecting post 104 is provided in the receiving groove 101. The position of the connecting post 104 is adjustable. The top end of the connecting post 104 passes through the mounting plate 102 and extends above the mounting plate 102. A tensioning turntable 105 is sleeved on the top end of the connecting post 104. The size of the tensioning turntable 105 is adjustable. The transmission belts 23 are respectively sleeved on the tensioning turntable 105 to realize the tension adjustment of the transmission belts 23.

[0090] Understandably, three through holes are provided on the mounting plate 102 for the motor shaft of the rotating motor 21, the top end of the transmission rod 25 and the top end of the connecting column 104 to pass through and extend above the mounting plate 102.

[0091] A fixing sleeve 106 is provided at the top of the receiving groove 107. The fixing sleeve 106 is integrally formed with the base 1 or detachably connected. At least two opposing limiting grooves 1061 are provided on the fixing sleeve 106. In this embodiment, three limiting grooves 1061 arranged in a ring array are preferably provided first. A first through groove 1062 is provided at the bottom end of the fixing sleeve 106 to guide the limiting grooves 1061. The first through groove 1062 extends to a portion of the guiding limiting grooves 1061. The filter cylinder 3 is sleeved on the fixing sleeve 106.

[0092] A feeding component 31 is provided at the top of the machine base 1. The top of the feeding component 31 has a feeding port 311 that passes through the feeding component 31. The bottom end has a feeding pipe 312 that connects to the feeding port 311. The bottom end of the feeding pipe 312 passes through the machine base 1 and the fixing sleeve 106 and extends into the filter cylinder 3 to feed the slurry into the filter cylinder 3.

[0093] It also includes a first connecting sleeve 32 and a second connecting sleeve 33. The bottom end of the first connecting sleeve 32 is provided with a first fitting groove 322, and a first sealing element 323 is provided in the first fitting groove 322. The top end of the second connecting sleeve 33 is provided with a second fitting groove 331, and a second sealing element 332 is provided in the second fitting groove 331. The top end of the filter media cylinder 3 is inserted into the first fitting groove 322 and the bottom end is inserted into the second fitting groove 331. The connection is sealed by the first sealing element 323 and the second sealing element 332. In this embodiment, the first sealing element 323 and the second sealing element 332 are silicone rings.

[0094] The outer peripheral wall of the first connecting sleeve 32 is provided with a plurality of first mounting holes 321 corresponding to the limiting groove 1061. A first limiting rod 324 is provided in the first mounting hole 321. In use, the end of the first limiting rod 324 passes through the first through groove 1062 and enters the limiting groove 1061. Then, the first connecting sleeve 32 is rotated so that the first limiting rod 324 rotates into the limiting groove 1061 to realize the detachable connection between the first connecting sleeve 32 and the fixed sleeve 106, thereby realizing the detachable connection between the filter cylinder 3 and the base 1.

[0095] Multiple snap-fit ​​grooves 333 are provided on the inner peripheral wall of the top end of the second connecting sleeve 33. The multiple snap-fit ​​grooves 333 are arranged in a ring array along the axial direction of the second connecting sleeve 33. A turbulence baffle 34 is provided in the snap-fit ​​groove 333 to collide with the slurry in the filter cylinder 3 to form turbulence and make the slurry fully stirred.

[0096] A sealing cover 36 is provided at the bottom end of the second connecting sleeve 33 to seal the outlet 35 of the filter media cylinder 3. A filter media tube 37 is provided at the bottom end of the sealing cover 36. The filter media tube 37 is provided with a filter media hole 371 that guides the outlet 35 of the filter media cylinder 3. A switching valve 38 is provided on the filter media tube 37. The switching end of the switching valve 38 extends into the filter media hole to control the opening and closing of the filter media hole 371. In this embodiment, a solenoid valve is preferably used as the switching valve 38.

[0097] The first stirring rotor 5 described in this embodiment has a first connecting hole 51 at its top end and a first stirring element 52 sleeved at its bottom end. At least one first stirring rod 53 is provided on the outer wall of the first stirring element 52. In this embodiment, it is preferably provided as two opposing first stirring rods 53. The first stirring rotor 5 is connected to the rotating mechanism 2 by the insertion and cooperation of the first connecting hole 51 and the transmission rod 25.

[0098] The second stirring rotor 6 described in this embodiment has a second connecting hole 61 at its top end and a connecting rod 63 at its bottom end. A conical sealing disc 64 is provided at the bottom end of the connecting rod 63. The conical sealing disc 64 and the connecting rod 63 can rotate relative to each other, and a sealing ring 65 is provided at the bottom end of the conical sealing disc 64, so as to achieve a sealed connection between the conical sealing disc 64 and the inner peripheral wall of the second connecting sleeve 33.

[0099] In use, the connecting rod 63 and the conical sealing disc 64 can be set to be elastically connected, so that the conical sealing disc 64 presses against the inner circumferential wall of the second connecting sleeve 33 under the action of centrifugal force during rotation to seal the outlet of the filter cylinder 3. After stopping rotation, it elastically resets and opens the outlet of the filter cylinder 4. In conjunction with the use of the switch valve 38, the sealing performance of the outlet of the filter cylinder 4 is improved.

[0100] At least one second stirring rod 62 is provided on the outer peripheral wall of the second stirring rotor 6. In this embodiment, two oppositely arranged second stirring rods 62 are preferably provided. Multiple baffles 66 arranged in a ring array are provided on the outer peripheral wall of the conical sealing disk 64. Together with the turbulence baffle 34 and the second stirring rods 62, the slurry in the filter cylinder 3 is stirred.

[0101] Understandably, in order to improve the ease of operation of the dynamic filtration and retention rate tester, a control circuit board 72 is provided in the receiving slot 101. The control circuit board 72 is electrically connected to the rotating motor 21. A touch panel 71 is provided on the side of the base 1 where the receiving slot 107 is located. The touch panel 71 is electrically connected to the control circuit board 72. When using the machine, the user can operate the control circuit board 72 to adjust the rotation time, speed and direction of the rotating motor 21 through the touch screen 71. A socket 108 for connecting to the mains power and a control switch 109 for controlling the opening and closing of the dynamic filtration and retention rate tester are provided on the side wall of the base 1. Both the socket 108 and the control switch 109 are electrically connected to the control circuit board 72.

[0102] The dynamic filtration and retention rate tester provided in this embodiment can be used in two ways. Firstly, by selecting a first stirring rotor 5 or a second stirring rotor 6 with an unsealed outlet 35 of the filter cylinder 3, the pulp entering the filter cylinder 3 is stirred by the first stirring rotor 5 or the second stirring rotor 6 and falls into the receiving cylinder 4 through the outlet 35. The retention rate of the pulp is calculated by comparing the mass of the pulp entering the filter cylinder 3 with the mass of the pulp on the receiving cylinder 4. Secondly, by selecting a second stirring rotor 6 or a first stirring rotor 5 with a sealable outlet 35 of the filter cylinder 3, the pulp entering the filter cylinder 3 is stirred by the first stirring rotor 5 or the second stirring rotor 6 and allowed to settle before the outlet 35 of the filter cylinder 3 is opened, allowing the pulp to fall into the receiving cylinder 4. The filtration rate of the pulp is calculated based on the curve of filtration volume versus time. This allows for the determination of pulp filtration and retention rate using a single tester, effectively improving the applicability of the tester and reducing equipment investment costs.

[0103] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A dynamic filterability and retention rate measuring instrument, characterized in that, include: Base (1); A receiving trough (107) is provided on the machine base (1); A rotating mechanism (2) is provided inside the machine base (1), and the rotating end of the rotating mechanism (2) extends into the receiving groove (107); The filter media cylinder (3) is located at the top of the receiving trough (107) and is detachably connected to the machine base (1). The rotating end of the rotating mechanism (2) is located inside the filter media cylinder (3). A first stirring rotor (5) or a second stirring rotor (6) is disposed inside the filter cylinder (3) and is rotatably connected to the rotating end of the rotating mechanism (2), and the second stirring rotor (6) seals the outlet (35) of the filter cylinder (3). When a second stirring rotor (6) is used, the second stirring rotor (6) includes: A connecting rod (63) is located at the bottom end of the second stirring rotor (6); A conical sealing disc (64) is sleeved on the bottom end of the connecting rod (63), and the conical sealing disc (64) and the connecting rod (63) are connected by an elastic element; A sealing ring (65) is provided at the bottom end of the conical sealing disc (64), and the bottom end of the sealing ring (65) abuts against the outer peripheral wall of the filter media cylinder (3); The elastic element is configured such that, during rotation, the conical sealing disc (64) presses against the inner circumferential wall of the filter cylinder (3) under centrifugal force to seal the outlet (35); when rotation stops, the conical sealing disc (64) elastically resets to open the outlet (35). The receiving cylinder (4) is placed on the receiving trough (107), located below the filter cylinder (3), and the outlet (35) of the filter cylinder (3) faces the receiving port of the receiving cylinder (4).

2. The dynamic filtration and retention rate measuring instrument according to claim 1, characterized in that, include: Multiple turbulence baffles (34) are provided and are detachably installed on the inner peripheral wall of the filter media cylinder (3); A snap-fit ​​groove (333) is provided on the inner wall of the filter media cylinder (3). The turbulence baffle (34) is inserted into the snap-fit ​​groove (333), and the plurality of turbulence baffles (34) are arranged in a ring array along the axial direction of the filter media cylinder (3).

3. The dynamic filtration and retention rate measuring instrument according to claim 2, characterized in that, The first stirring rotor (5) includes: The first connecting hole (51) is opened at the top of the first stirring rotor (5), and the rotating end of the rotating mechanism (2) is inserted into the first connecting hole (51). The first stirring element (52) is sleeved on the bottom end of the first stirring rotor (5); At least one first stirring rod (53) is provided on the outer wall of the first stirring member (52).

4. The dynamic filtration and retention rate measuring instrument according to claim 2, characterized in that, The second stirring rotor (6) includes: The second connecting hole (61) is opened at the top of the second stirring rotor (6), and the rotating end of the rotating mechanism (2) is inserted into the second connecting hole (61); At least one second stirring rod (62) is provided on the outer wall of the second stirring rotor (6); Multiple baffles (66) are provided on the outer peripheral wall of the conical sealing disk (64) and are arranged in a ring array along the axial direction of the second stirring rotor (6).

5. The dynamic filtration and retention rate measuring instrument according to any one of claims 1-4, characterized in that, include: A fixed sleeve (106) is fixed on the top wall of the receiving groove (107), and the rotating end of the rotating mechanism (2) extends through the fixed sleeve (106) into the receiving groove (107). At least two limiting grooves (1061) are provided and are formed on the inner peripheral wall of the fixing sleeve (106); The first mounting hole (321) is opened on the outer wall of the filter media cylinder (3) and matches the limiting groove (1061); The first limiting rod (324) is provided in the first mounting hole (321), and the end of the first limiting rod (324) extends into the filter cylinder (3) through the first mounting hole (321); The first through groove (1062) is opened at the bottom end of the fixed sleeve (106) and connects to the limiting groove (1061). The filter material cylinder (3) is sleeved on the fixed sleeve (106). The first limiting rod (324) passes through the first through groove (1062) and is embedded in the limiting groove (1061) to limit and cooperate with the limiting groove (1061).

6. The dynamic filtration and retention rate measuring instrument according to claim 5, characterized in that, include: The first connecting sleeve (32) is located at the top of the filter media cylinder (3) and is sleeved on the fixed sleeve (106). The first connecting hole (51) is opened on the first connecting sleeve (32). The second connecting sleeve (33) is located at the bottom end of the filter media cylinder (3); The first insertion groove (322) is formed at the bottom end of the first connecting sleeve (32); The second insertion groove (331) is formed at the top of the second connecting sleeve (33); The first sealing element (323) is fitted into the first fitting groove (322), the top end of the filter media tube (3) is inserted into the first fitting groove (322), and the top end of the filter media tube (3) presses against the first sealing element (323); The second sealing element (332) is embedded in the second fitting groove (331), the bottom end of the filter media cylinder (3) is inserted into the second fitting groove (331), and the bottom end of the filter media cylinder (3) presses against the second sealing element (332).

7. The dynamic filtration and retention rate measuring instrument according to claim 6, characterized in that, include: A sealing cover (36) is provided at the bottom end of the second connecting sleeve (33), and a filter tube (37) is provided at the bottom end of the sealing cover (36), which extends toward the receiving cylinder (4). The filter material hole (371) is opened on the filter material tube (37), passes through the filter material tube (37), and the top of the filter material hole (371) passes through the sealing cover (36) to conduct the filter material cylinder (3). A switching valve (38) is provided on the filter media tube (37), and the switching end of the switching valve (38) extends into the filter media hole (371).

8. The dynamic filtration and retention rate measuring instrument according to claim 7, characterized in that, include: The feed component (31) is located at the top of the machine base (1); The feed inlet (311) is located on the feed member (31) and passes through the feed member (31). The feed pipe (312) is located at the bottom end of the feed component (31), and is connected to the feed port (311). The bottom end of the feed pipe (312) passes through the machine base (1) and the fixing sleeve (106) and extends into the filter cylinder (3).

9. The dynamic filtration and retention rate measuring instrument according to any one of claims 1-4, characterized in that, include: A receiving groove (101) is provided in the machine base (1), and a rotating mechanism (2) is provided in the receiving groove (101). The rotating mechanism (2) includes a rotating motor (21) and a transmission rod (25). The rotating motor (21) is fixed in the receiving groove (101), and the transmission rod (25) is the rotating end of the rotating mechanism (2). The drive turntable (22) is sleeved on the motor shaft of the rotating motor (21); Driven turntable (24) is sleeved on the top of the transmission rod (25), and the bottom end of the transmission rod (25) passes through the base (1) and extends into the filter cylinder (3) and is connected to the first stirring rotor (5) or the second stirring rotor (6). The transmission belt (23) is located in the receiving groove (101), with one end sleeved on the driving turntable (22) and the other end sleeved on the driven turntable (24), and is connected to the rotating motor (21) and the transmission rod (25) respectively.

10. The dynamic filtration and retention rate measuring instrument according to claim 9, characterized in that, include: Mounting plate (102) is fixed in the receiving groove (101). The rotating motor (21) and the transmission rod (25) are both located at the bottom end of the mounting plate (102). The motor shaft of the rotating motor (21) and the top end of the transmission rod (25) both pass through the mounting plate (102) and extend to the top end of the mounting plate (102). A connecting post (104) is fixed in the receiving groove (101), located below the mounting plate (102), with its top end passing through the mounting plate (102) and extending above the mounting plate (102); The tensioning turntable (105) is rotatably mounted on the top of the connecting column (104) and is detachably connected to the connecting column (104). It is located between the driving turntable (22) and the driven turntable (24), and part of the transmission belt (23) is mounted on the tensioning turntable (105).

Images