Pulping machine and working method thereof

Abstract

The invention relates to the technical field of papermaking equipment, in particular to a pulping machine and a working method thereof.The pulping machine comprises a front machine body and a rear machine body which are connected in a sealed mode, the front machine body is provided with a front feeding port and a moving mechanism, the front machine body is internally provided with a moving seat fixed to the stroke end of the moving mechanism, the moving seat is provided with a front grinding piece, and the rear machine body is internally provided with a rear grinding piece; a discharge port is formed in the rear machine body, a rotating shaft is arranged in the rear machine body in a penetrating manner, a shaft sealing mechanism and a rotating disc capable of moving axially are arranged on the rotating shaft, the shaft sealing mechanism is in sealing connection with the rear machine body, and rotating grinding pieces are arranged at the two ends of the rotating disc and are in clearance with the front grinding piece and the rear grinding piece respectively; a forward pushing mechanism which penetrates through the rear machine body and the rear abrasive disc and is hermetically connected with the rear machine body and the rear abrasive disc is arranged on the rear machine body and is used for forwards pushing the rotary disc fixed with the rotary abrasive disc. According to the pulping machine and the working method thereof, the rotating disc on the rotating shaft is convenient to disassemble and move; the rotary grinding disc on the rotary disc cannot be damaged, and the service life of the grinding disc is prolonged.

Description

Technical Field

[0001] This invention relates to the field of papermaking equipment technology, specifically to a pulping machine and its working method. Background Technology The double-disc refiner is a mechanical device widely used in pulping, papermaking, and biomass processing for refining and polishing fiber materials. It was developed from the pulping process in the papermaking industry. Initially, the double-disc refiner mainly used two sets of relatively rotating discs to mechanically process the fibers, making them finer, more filamentous, and more dispersed in the solution, resulting in paper products with higher strength and quality.

[0002] Currently, double-disc refiners are widely used in many industries such as papermaking, food, and chemicals. The main structure of a double-disc refiner is that two grinding discs with opposing grinding teeth in the middle rotate through a transmission component, while fixed grinding discs are placed on both sides of the rotating discs to process fibers. In addition, by adjusting the distance between the two fixed grinding discs, the gap between the rotating discs and the fixed grinding discs can be changed, thereby controlling the refining process.

[0003] After completing the single-stage grinding operation, the double-disc refiner needs to disassemble the front body, remove the rotating grinding discs from the shaft, clean and replace the front grinding discs in the front body and the rear grinding discs in the rear body, as well as the removed rotating grinding discs. The rotating grinding discs also need to be moved to the front of the shaft. After reassembly, the next grinding operation can be carried out.

[0004] However, conventional dual-disc refiners still have the following shortcomings when removing the rotating grinding discs: Because the gap between the rotating grinding disc located below the discharge port and the inner wall of the front machine body is small, and the outer diameter of the rotating grinding disc is large, it cannot be removed by a multi-claw puller, making it difficult to remove and move the rotating grinding disc. When removing it by a specially designed multi-claw puller, the force point is at the outer edge of the rotating grinding disc, which can easily cause deformation of the outer ring of the rotating grinding disc, distortion of the tooth surface, and damage to the spline hole, affecting the grinding effect and reducing the service life. Summary of the Invention

[0005] To address the technical problems existing in the background art, the present invention provides a grinding machine and its working method, which facilitates the removal and movement of the rotating disk on the rotating shaft used to fix and install the rotating grinding disc; it will not damage the rotating grinding disc on the rotating disk and extends the service life of the grinding disk.

[0006] The technical solution adopted by this invention is: A pulping machine, comprising: The machine comprises a front body and a rear body that are sealed together. The upper part of the front body is connected to a feed inlet, and the front end of the front body is provided with a moving mechanism. A moving seat is movably installed inside the front body and fixedly connected to the stroke end of the moving mechanism. A front grinding disc is provided at the rear end of the moving seat, and a rear grinding disc is provided at the front end of the rear body. A discharge port is connected to the upper part of the rear body. A rotating shaft is installed through the rear body. A rotating disk is slidably mounted on the front part of the rotating shaft. Rotating grinding discs are respectively provided at the front and rear ends of the rotating disk. The gap between the rotating grinding discs is set between the front grinding disc and the rear grinding disc. A shaft sealing mechanism is sealed and connected to the rear body at the rear end of the rotating shaft.

[0007] A forward pushing mechanism is provided at the rear end of the rear body. The forward pushing mechanism passes through the rear body and the rear grinding disc and is sealed to both, in order to push the rotating disc fixed thereon.

[0008] Furthermore, a rear feed port is connected to the upper end of the rear body behind the discharge port.

[0009] Furthermore, the inlet and the outlet have the same diameter.

[0010] The diameter of the discharge port is 1-2 standard sizes larger than that of the inlet and the outlet.

[0011] Furthermore, the rear body and the rear grinding disc are provided with through holes, and the axis of the through holes is parallel to the central axis of the rotating shaft.

[0012] Furthermore, the forward pushing mechanism and through holes are arranged in a circular array with the central axis of the rotating shaft as the center.

[0013] Furthermore, the pushing mechanism includes: A push rod is inserted into the through hole along the axial direction. A receiving ring is protruding on the rear end wall of the rear body. The receiving ring is coaxial with the push rod and is spaced apart. A sealing filler is provided in the gap between the receiving ring and the push rod. The sealing filler is sleeved outside the push rod. A pressure seat is provided at the rear end of the sealing filler. A sealing bolt is threaded through the pressure seat and screwed to the rear end wall of the rear body.

[0014] A cylinder is coaxially connected to the rear end of the push rod. The cylinder is connected to a solenoid valve. The solenoid valve is electrically connected to the control system and connected to the compressed air pipeline.

[0015] Furthermore, the front end of the pressure seat is configured as a protruding first annular pressing part, the first annular pressing part is spaced apart from the outer wall of the top rod and the inner wall of the receiving ring, and the rear end of the pressure seat is configured as a fixing part that extends radially and protrudes from the outer wall of the receiving ring, and the fixing part is provided with a first through hole group for inserting sealing bolts.

[0016] Furthermore, the pushing mechanism includes: A push rod is inserted into the through hole along the axial direction. A receiving ring is protruding on the rear end wall of the rear body. The receiving ring is coaxial with the push rod and is spaced apart. A sealing packing is provided in the gap between the receiving ring and the push rod. The sealing packing is sealed outside the push rod. A piston cylinder is abutted against the rear end of the sealing packing. A sealing bolt is threaded through the piston cylinder and screwed to the rear end wall of the rear body.

[0017] A piston is coaxially and sealed to the piston cylinder with a push rod extending into the piston cylinder. An inlet and outlet port group is connected to the outer wall of the piston cylinder. The inlet and outlet port group is connected to a solenoid valve. The solenoid valve is electrically connected to the control system and connected to the compressed air pipeline.

[0018] Furthermore, the front end of the piston cylinder is configured as a sealing connection part that extends radially and protrudes from the outer wall of the receiving ring. A second perforation group for inserting a sealing bolt is provided through the sealing connection part. The front end inside the piston cylinder is configured as a protruding second annular pressing part. The second annular pressing part is spaced apart from the outer wall of the push rod and the inner wall of the receiving ring. A thrust spring is provided at the front end of the piston inside the piston cylinder, and the two ends of the thrust spring abut against the piston cylinder and the piston, respectively; The piston cylinder has an adjusting bolt at the rear end of the sealing screw that abuts against the piston cylinder.

[0019] A method for operating a pulp refiner includes: S1, Polishing: The solenoid valve loses power and uses compressed air to retract the push rod inside the through hole. The drive motor is started to rotate the disc on the rotating shaft. The clearance between the rotating grinding disc and the front and rear grinding discs is adjusted by adjusting the stroke of the moving mechanism. Raw materials are fed in through the front feed inlet and the rear feed inlet, and after being ground into a slurry by the front grinding disc, the rotating grinding disc and the rear grinding disc, they are discharged through the outlet. S2, Reset: When the drive motor is stopped, the solenoid valve is energized and compressed air causes the push rod in the through hole to extend. The extended push rod abuts against the rotating grinding disc and pushes the disc forward.

[0020] The beneficial effects of the pulping machine of the present invention are as follows: 1. Increase the slurry feed rate by using the front and rear feed inlets to improve production efficiency; 2. The rotating disc with the rotating grinding disc fixed on it is pushed forward by the forward pushing mechanism, which makes it easy to remove and reset the rotating grinding disc without damaging the outer ring, tooth surface and spline hole of the rotating grinding disc, thus extending the service life of the rotating grinding disc. Attached Figure Description

[0021] Figure 1This is a schematic cross-sectional view of an embodiment of the present invention; Figure 2 This is an example of the present invention. Figure 1 Enlarged diagram of part A in the diagram; Figure 3 This is a schematic diagram of the driving component in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the driving component in Embodiment 2 of the present invention; Figure 5 This is a flowchart illustrating an example of the present invention.

[0022] In the picture: 10. Front body; 11. Inlet feed port; 13. Moving mechanism. 20. Moving base; 21. Front grinding disc; 30. Rotary shaft; 31. Rotary disc; 32. Rotary grinding disc; 33. Shaft sealing mechanism. 40. Rear body; 41. Rear grinding disc; 42. Discharge port; 43. Rear feed port; 44. Through hole; 45. Push rod. 46. ​​Receptacle ring; 47. Sealing packing; 480. Pressure seat; 49. Sealing bolt. 481. Piston cylinder; 482. Piston; 483. Thrust spring; 484. Adjusting bolt; 485. Inlet and outlet port assembly. 50. Cylinder; 51. Solenoid valve. Detailed Implementation

[0023] To more clearly and explicitly illustrate the specific objectives and implementation methods of this invention, a complete description of the technical solution of this invention will be provided below. The described embodiments are only a part of the embodiments of this invention, not all of them. Without creative effort, all other embodiments based on the embodiments described in this invention are within the protection scope of this invention.

[0024] This invention provides a pulping machine, such as... Figure 1 As shown, it includes: The front body 10 and the rear body 40 are sealed together and hinged to each other to allow for disassembly of the front body 10. The upper part of the front body 10 has a feed inlet 11, and a moving mechanism 13 is fixedly mounted at the front end of the front body 11. A movable seat 20, fixedly connected to the stroke end of the moving mechanism 13, is movably mounted inside the front body 11, and a front grinding disc 21 is fixedly mounted at the rear end of the movable seat 20. The front end of the rear body 40 has a fixed rear grinding disc 41, and the upper part of the rear body 40 has a discharge port 42 and a rear feed inlet 43. The feed inlet 11, discharge port 42, and rear feed inlet 43 are arranged sequentially from front to back. The inlet 11 and the rear inlet 43 have the same diameter, while the outlet 42 has a diameter that is 1-2 standard sizes larger than the inlet 11 and the rear inlet 43. A rotating shaft 30 is installed through the rear body 40. A rotating disk 31 is coaxially driven at the front of the rotating shaft 30. The rotating disk 31 is located below the outlet 42. The rotating shaft 30 and the rotating disk 31 are connected by a spline, allowing the rotating disk 31 to move along the axial direction of the rotating shaft 30. Rotating grinding discs 32 are fixedly installed at the front and rear ends of the rotating disk 31, respectively. The gap between the rotating grinding discs 32 is set between the front grinding disc 21 and the rear grinding disc 41. A shaft sealing mechanism 33 is provided at the rear of the rotating shaft 30, and the shaft sealing mechanism 33 is sealed to the rear body 40.

[0025] A through hole 44 is provided through the rear body 40 and the rear grinding disc 41, and the axis of the through hole 44 is parallel to the central axis of the rotating shaft 30. A front pushing mechanism is sealed and fixed at the rear end of the rear body 40. The stroke end of the front pushing mechanism passes through the through hole 44 provided on the rear body 40 and the rear grinding disc 41, and is used to push the rotating disk 31 with the rotating grinding disc 32 fixed on it forward.

[0026] Multiple forward-pushing mechanisms and through holes 44 are arranged in a circular array centered on the central axis of the rotating shaft 30, including: Example 1: A push rod 45 is axially inserted into the through hole 44. A receiving ring 46 protrudes from the rear end wall of the rear body 40. The receiving ring 46 is coaxial with the push rod 45 and is spaced apart. A sealing filler 47 is provided in the gap between the receiving ring 46 and the push rod 45. The sealing filler 47 is sealed and sleeved outside the push rod 44. A pressure seat 480 is abutted at the rear end of the sealing filler 47. A sealing bolt 49 is threaded through the pressure seat 480 and screwed to the rear end wall of the rear body 40. The front end of the pressure seat 480 is a protruding first annular pressing part. The first annular pressing part is spaced apart from the outer wall of the push rod 45 and the inner wall of the receiving ring 46. The rear end of the pressure seat 480 is a fixing part that extends radially and protrudes from the outer wall of the receiving ring 46. A first through hole group for inserting the sealing bolt 49 is provided through the fixing part.

[0027] A cylinder 50 is coaxially connected to the rear end of the push rod 45. The cylinder 50 is connected to a solenoid valve 51. The solenoid valve 51 is electrically connected to the control system and connected to the compressed air pipeline.

[0028] Example 2: A push rod 45 is axially inserted into the through hole 44. A receiving ring 46 protrudes from the rear end wall of the rear body 40. The receiving ring 46 is coaxial with the push rod 45 and is spaced apart. A sealing packing 47 is provided in the gap between the receiving ring 46 and the push rod 45. The sealing packing 47 is fitted over the push rod 44. A piston cylinder 481 is abutted against the rear end of the sealing packing 47. A sealing bolt 49 is threaded through the piston cylinder 481 and screwed onto the rear end wall of the rear body 40. A sealing bolt 49 is provided at the front end of the piston cylinder 481. A sealing connection portion is provided that extends radially and protrudes from the outer wall of the receiving ring 46. A second perforation group for inserting a sealing bolt 49 is provided through the sealing connection portion. The front end of the piston cylinder 481 is provided as a protruding second annular pressing part. The second annular pressing part is spaced apart from the outer wall of the push rod 45 and the inner wall of the receiving ring 46. A thrust spring 483 is provided at the front end of the piston 482 in the piston cylinder 481. The two ends of the thrust spring 483 abut against the piston cylinder 481 and the piston 482, respectively.

[0029] A piston 482 is coaxially and sealed to extend into the piston cylinder 481 via a push rod 45. A rear end cover is sealed to the rear end of the piston cylinder 481. An adjusting bolt 484 is screwed to the rear end of the rear end cover and abuts against the piston cylinder 481 to limit the position of the push rod 45 when it is in the retracted state. An air inlet and outlet port group 485 is connected to the outer wall of the piston cylinder 481. The air inlet and outlet port group 485 is connected to a solenoid valve 51. The solenoid valve 51 is electrically connected to the control system and connected to the compressed air pipeline.

[0030] Based on the specific structure of a pulp refiner in the above embodiments, the working method of a pulp refiner will be further described below: S0. Pre-power-on status check: The drive motor, solenoid valve 51, and feedback components of cylinder 50 or piston 482 of the pulper are electrically connected to the automated control system.

[0031] By comparing the control signal sent to the solenoid valve 51 with the feedback signal received from the cylinder 50 or piston 482, the synchronization status of the control signal and the feedback signal is obtained.

[0032] When the control signal and the feedback signal are in the same state, it indicates a synchronous state. At this time, if cylinder 50 or piston 482 is in the retracted position, the conditions for starting the machine are met; otherwise, if cylinder 50 or piston 482 is in the extended position, the conditions for starting the machine are not met.

[0033] When the control signal and the feedback signal have different states, it indicates a fault state and a fault check is required. If it is a false alarm, the system can be powered on after the fault alarm is reset through the automatic control system. Otherwise, if it is not a false alarm, the fault needs to be eliminated.

[0034] Once the fault is completely eliminated, the device is ready to be powered on; otherwise, if the fault cannot be eliminated, the device is not ready to be powered on.

[0035] S1, Polishing: Before grinding, ensure that the push rod 45 inside the through hole 44 is in the retracted state.

[0036] The control flow of the forward pushing mechanism in Example 1 is as follows: When the solenoid valve 51 is de-energized, compressed air is delivered to the cylinder 50 through the solenoid valve 51, and the stroke end of the cylinder 50 is in a retracted state, that is, the push rod 45 in the through hole 44 is in a retracted state.

[0037] The control flow of the forward pushing mechanism in Example 2 is as follows: When the solenoid valve 51 is de-energized, compressed air is delivered to the piston cylinder 481 via the solenoid valve 51. Alternatively, when the solenoid valve 51 is de-energized and the air supply is cut off, the piston 482 inside the piston cylinder 481 moves backward under the thrust of the thrust spring 483 until the piston cylinder 481 abuts against the adjusting bolt 484. When the piston 482 moves to its last end, the push rod 45 in the through hole 44 is in the retracted state.

[0038] After the push rod 45 inside the through hole 44 is in the retracted state, the drive motor is started to drive the rotating disk 31 on the rotating shaft 30 to rotate. By adjusting the stroke of the moving mechanism 13, the gap between the rotating grinding disc 32 and the front grinding disc 21 and the rear grinding disc 41 is adjusted.

[0039] The raw material is injected through the inlet 11 and the outlet 43, and after being crushed by the front grinding plate 21, the rotating grinding plate 32 and the rear grinding plate 41, it is discharged through the outlet 42.

[0040] S2, Reset: Before resetting, ensure that the drive motor is in a stopped state.

[0041] The control flow of the forward pushing mechanism in Example 1 is as follows: When the solenoid valve 51 is energized, compressed air is delivered to the cylinder 50 through the solenoid valve 51, and the stroke end of the cylinder 50 is in the extended state, that is, the push rod 45 in the through hole 44 is in the extended state.

[0042] The control flow of the forward pushing mechanism in Example 2 is as follows: When the solenoid valve 51 is energized, compressed air is delivered to the piston cylinder 481 through the solenoid valve 51, causing the piston 482 in the piston cylinder 481 to move forward, that is, the push rod 45 in the through hole 44 is in the extended state.

[0043] The extended push rod 45 abuts against the rotating grinding disc 32 and pushes the rotating disk 31 forward.

[0044] In summary, these are merely preferred embodiments of the present invention and are not intended to limit the scope of the invention. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of the present invention is not limited to the contents of the specification; all equivalent variations and modifications in shape, structure, features, and spirit that conform to the claims of the present invention should be included within the scope of the claims.

Claims

1. A pulping machine, comprising: A front body (10) and a rear body (40) are connected in a sealed manner. The front body (10) has a feed inlet (11) connected to its upper part. A moving mechanism (13) is provided at the front end of the front body (11). A moving seat (20) is movably arranged inside the front body (11) and fixedly connected to the stroke end of the moving mechanism (13). A front grinding plate (21) is provided at the rear end of the moving seat (20). A rear grinding plate (41) is provided at the front end of the rear body (40). The upper part of the rear body (40) is connected to a feed inlet (11). The machine has a discharge port (42), and a rotating shaft (30) is installed through the rear body (40). A rotating disk (31) is slidably mounted on the front of the rotating shaft (30). Rotating grinding discs (32) are respectively installed at the front and rear ends of the rotating disk (31). The gap between the rotating grinding discs (32) is set between the front grinding disc (21) and the rear grinding disc (41). A shaft sealing mechanism (33) is provided on the rear of the rotating shaft (30). The shaft sealing mechanism (33) is sealed to the rear body (40). The machine is characterized in that: The rear end of the rear body (40) is provided with a push mechanism, which passes through the rear body (40) and the rear grinding plate (41) and is sealed to both, in order to push the rotating disk (31) with the rotating grinding plate (32) fixed thereon.

2. A pulping machine according to claim 1, characterized in that: The rear inlet (43) is connected to the upper end of the rear body (40) behind the discharge port (42).

3. A pulping machine according to claim 2, characterized in that: The front feed inlet (11) and the rear feed inlet (43) have the same diameter; The diameter of the discharge port (42) is 1-2 standard sizes larger than that of the inlet port (11) and the outlet port (43).

4. A pulping machine according to claim 1, 2, or 3, characterized in that: The rear body (40) and the rear grinding disc (41) are provided with through holes (44), and the axis of the through holes (44) is parallel to the central axis of the rotating shaft (30).

5. A pulping machine according to claim 4, characterized in that: The forward pushing mechanism and through holes (44) are arranged in a circular array with the central axis of the rotating shaft (30) as the center.

6. A pulping machine according to claim 5, characterized in that: The forward pushing mechanism includes: A push rod (45) is axially inserted into the through hole (44). A receiving ring (46) is protruding from the rear end wall of the rear body (40). The receiving ring (46) is coaxial with the push rod (45) and is spaced apart. A sealing filler (47) is provided in the gap between the receiving ring (46) and the push rod (45). The sealing filler (47) is sealed and sleeved outside the push rod (44). A pressure seat (480) is abutted at the rear end of the sealing filler (47). A sealing bolt (49) is threaded through the pressure seat (480) and screwed to the rear end wall of the rear body (40). A cylinder (50) is coaxially connected to the rear end of the push rod (45). The cylinder (50) is connected to a solenoid valve (51). The solenoid valve (51) is electrically connected to the control system and connected to the compressed air pipeline.

7. A pulping machine according to claim 6, characterized in that: The front end of the pressure seat (480) is configured as a protruding first annular pressing part, and the first annular pressing part is spaced apart from the outer wall of the top rod (45) and the inner wall of the receiving ring (46). The rear end of the pressure seat (480) is configured as a fixing part that extends radially and protrudes from the outer wall of the receiving ring (46). A first through hole group for inserting a sealing bolt (49) is provided through the fixing part.

8. A pulping machine according to claim 5, characterized in that: The forward pushing mechanism includes: A push rod (45) is axially inserted into the through hole (44). A receiving ring (46) is protruding from the rear end wall of the rear body (40). The receiving ring (46) is coaxial with the push rod (45) and is spaced apart. A sealing filler (47) is provided in the gap between the receiving ring (46) and the push rod (45). The sealing filler (47) is sealed and sleeved outside the push rod (44). A piston cylinder (481) is abutted at the rear end of the sealing filler (47). A sealing bolt (49) is threaded through the piston cylinder (481) and screwed to the rear end wall of the rear body (40). A piston (482) is coaxially and sealed and fixedly installed in the piston cylinder (481) with a push rod (45). An air inlet and outlet hole group (485) is connected to the outer wall of the piston cylinder (481). The air inlet and outlet hole group (485) is connected to a solenoid valve (51). The solenoid valve (51) is electrically connected to the control system and connected to the compressed air pipeline.

9. A pulping machine according to claim 8, characterized in that: The piston cylinder (481) has a sealing connection part that extends radially and protrudes from the outer wall of the receiving ring (46). The sealing connection part is provided with a second perforation group for inserting a sealing bolt (49). The piston cylinder (481) has a protruding second annular pressing part at the front end. The second annular pressing part is spaced apart from the outer wall of the push rod (45) and the inner wall of the receiving ring (46). A thrust spring (483) is provided at the front end of the piston (482) inside the piston cylinder (481), and the two ends of the thrust spring (483) abut against the piston cylinder (481) and the piston (482) respectively; The piston cylinder (481) is provided with an adjusting bolt (484) at the rear end of the piston cylinder (481) to abut against the piston cylinder (481).

10. A method of operating a pulp refiner, wherein the pulp refiner is described in claim 7 or 9, characterized in that: S1, Polishing: The solenoid valve (51) is de-energized and compressed air causes the push rod (45) in the through hole (44) to be in a retracted state; Start the drive motor to drive the rotating disk (31) on the rotating shaft (30) to rotate. Adjust the stroke of the moving mechanism (13) to adjust the gap between the rotating grinding disc (32) and the front grinding disc (21) and the rear grinding disc (41); The raw material is injected through the inlet (11) and the outlet (43), and after being crushed by the front grinding plate (21), the rotating grinding plate (32) and the rear grinding plate (41), it is discharged through the outlet (42). S2, Reset: When the drive motor is stopped, the solenoid valve (51) is energized and compressed air causes the push rod (45) in the through hole (44) to extend. The extended push rod (45) abuts against the rotating grinding disc (32) and pushes the rotating disc (31) forward.

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