A headbox arrangement for kraft paper production

Abstract

The utility model relates to the technical field of flow box, concretely to a flow box device for cow leather card paper production, including paper pulp tank body, the fixed assembly of lower lip board is equipped with in the pulp outlet end of paper pulp tank body, the lateral wall of paper pulp tank body is hinged with upper lip board, the lateral wall rotation of paper pulp tank body is connected with electric push rod, the output end of electric push rod is connected with upper lip board rotation, the lateral wall fixed assembly of paper pulp tank body is equipped with controller, the surface of lower lip board is equipped with cleaning structure, the cleaning structure includes the support frame fixed mounting in the surface of lower lip board, the inner wall sliding connection of support frame has sliding frame. In the utility model, through setting up cleaning structure, the water flow that sprays head sprays, the accumulated pulp that adheres on the surface of upper lip board is washed, and through the sliding frame of horizontal movement, realize the overall cleaning of the whole upper lip board surface accumulated pulp.

Description

Technical Field

[0001] This utility model relates to the field of headbox technology, and in particular to a headbox device for the production of kraft paperboard. Background Technology

[0002] Kraft cardboard is a type of kraft paper. Generally, kraft paper with a weight of 120 grams or more is called kraft cardboard. During the production of kraft cardboard, a headbox is used to evenly and stably spray the pulp onto the forming wire. However, the headboxes used in existing technologies generally have the following problems: During the use of the headbox, the flow rate and thickness of the pulp can be controlled by the cooperation of the rotatable upper lip plate and the fixed lower lip plate. During this process, the pulp will splash. The splashed pulp is easy to adhere to the surface of the upper lip plate, resulting in pulp accumulation. Pulp accumulation will disrupt the uniform distribution of the pulp and thus affect pulp production.

[0003] In summary, existing headboxes often experience pulp splashing during operation. This splashed pulp tends to adhere to the surface of the upper lip plate, leading to pulp accumulation. This accumulation disrupts the uniform distribution of the pulp, thus affecting pulp production. Therefore, we propose a headbox device for kraft paper production. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art, the present invention provides a headbox device for the production of kraft paperboard.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a headbox device for kraft paper production, comprising a pulp box body, a lower lip plate fixedly mounted at the pulp outlet end of the pulp box body, an upper lip plate hinged to the side wall of the pulp box body, an electric push rod rotatably connected to the side wall of the pulp box body, the output end of the electric push rod rotatably connected to the upper lip plate, a controller fixedly mounted on the side wall of the pulp box body, and a cleaning structure provided on the surface of the lower lip plate, the cleaning structure including a support frame fixedly mounted on the surface of the lower lip plate, and a sliding frame slidably connected to the inner wall of the support frame; A water pump is fixedly mounted on the surface of the sliding frame. A water distribution pipe is fixedly mounted on the discharge end of the water pump. Several nozzles are fixedly connected to the circumference of the water distribution pipe. A water receiving hopper, which is fixedly connected to the inlet end of the water pump, is fixedly mounted on the surface of the sliding frame. A water storage hopper is fixedly mounted on the side wall of the pulp box body. Several solenoid valves are fixedly connected to the surface of the water storage hopper. A through-beam photoelectric sensor is fixedly mounted on the outer wall of the water receiving hopper. A motor is fixedly mounted on the surface of the sliding frame. A gear is fixedly mounted on the output end of the motor. The gear is rotatably connected to the sliding frame. A rack that meshes with the gear is fixedly mounted on the outer wall of the support frame. The sprayed water flow can clean the accumulated pulp adhering to the surface of the upper lip plate.

[0006] Preferably, a retaining frame is fixedly mounted on the circumferential surface of the water distribution pipe, and a brush plate is slidably connected to the inner wall of the retaining frame.

[0007] Preferably, a pin slides through the card frame, and the pin slides through the brush plate.

[0008] Preferably, a first spring is fitted around the circumferential surface of the pin, and the two ends of the first spring are fixedly connected to the pin and the retaining frame, respectively.

[0009] Preferably, a sliding rod is slidably passed through the support frame, a force-bearing plate is fixedly mounted on one end of the sliding rod, and a second spring is sleeved on the surface of the sliding rod, with the two ends of the second spring fixedly connected to the force-bearing plate and the support frame, respectively.

[0010] Preferably, the slide bar has a regular hexagonal prism structure.

[0011] Preferably, a rough plate is fixedly mounted on the surface of the load-bearing plate, and the rough plate abuts against the inner wall of the support frame.

[0012] Compared with the prior art, this utility model provides a headbox device for kraft paper production, which has the following advantages: (1) In this utility model, by setting up a cleaning structure, water is sprayed out by the nozzle to wash the slurry attached to the surface of the upper lip plate, and the slurry on the entire surface of the upper lip plate is thoroughly cleaned by the horizontally moving sliding frame.

[0013] (2) While the nozzle is spraying water to clean, the brush plate will move with the sliding frame to physically scrub the stubborn slurry that is difficult to clean with water, further improving the cleaning effect and ensuring that there is no residual slurry on the surface of the upper lip plate.

[0014] (3) When the sliding frame slides to the end of the support frame, it will contact the force plate. The force plate pushes the slide rod to move, the second spring is compressed and generates a reverse elastic force, which plays a buffering and shock-absorbing role on the sliding frame and reduces the impact force of the sliding frame. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the headbox device for the production of kraft paperboard according to this utility model; Figure 2 This is a structural schematic diagram of the support frame of this utility model; Figure 3 This is a structural schematic diagram of the support frame of this utility model from another angle; Figure 4 This utility model Figure 2 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the disassembled structure of the sliding frame of this utility model; Figure 6 This is a schematic diagram of the split structure of the sliding frame of this utility model from another angle; Figure 7 This utility model Figure 3 Enlarged view of point B in the middle.

[0016] Legend: 1. Pulp box body; 2. Lower lip plate; 3. Upper lip plate; 4. Electric actuator; 5. Cleaning structure; 501. Support frame; 502. Sliding frame; 503. Water pump; 504. Water distribution pipe; 505. Nozzle; 506. Water receiving hopper; 507. Water storage hopper; 508. Solenoid valve; 509. Through-beam photoelectric sensor; 510. Motor; 511. Gear; 512. Rack; 513. Frame; 514. Brush plate; 515. Pin; 516. First spring; 517. Sliding rod; 518. Force plate; 519. Second spring; 520. Rough plate; 6. Controller. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] like Figures 1-7As shown, this utility model provides a headbox device for kraft paper production, including a pulp box body 1. A lower lip plate 2 is fixedly mounted on the pulp outlet end of the pulp box body 1. An upper lip plate 3 is hinged to the side wall of the pulp box body 1. An electric actuator 4 is rotatably connected to the side wall of the pulp box body 1. The output end of the electric actuator 4 is rotatably connected to the upper lip plate 3. A controller 6 is fixedly mounted on the side wall of the pulp box body 1. The controller 6 is electrically connected to the electric actuator 4. A cleaning structure 5 is provided on the surface of the lower lip plate 2. The cleaning structure 5 includes components fixedly installed on the surface of the lower lip plate 2. The support frame 501 has a sliding frame 502 slidably connected to its inner wall. During the production of kraft paper, the electric push rod 4 is first started by the controller 6. The extension and retraction of the output end of the electric push rod 4 will drive the upper lip plate 3 to rotate around the hinge point with the pulp box body 1, thereby adjusting the gap between the upper lip plate 3 and the lower lip plate 2 to adapt to the production needs of kraft paper of different thicknesses. When the pulp flows out from the pulp outlet end of the pulp box body 1 and passes through the gap between the upper lip plate 3 and the lower lip plate 2, a uniform pulp layer can be formed to prepare for the subsequent forming process.

[0019] In actual production, the pulp of kraft paperboard is prone to splashing and adhering to the surface of the upper lip plate 3, forming pulp accumulation. If not cleaned in time, it will affect the uniformity of pulp distribution. To avoid the above situation, in this embodiment, a water pump 503 is fixedly mounted on the surface of the sliding frame 502. A water distribution pipe 504 is fixedly mounted on the discharge end of the water pump 503. Several nozzles 505 are fixedly connected to the circumferential surface of the water distribution pipe 504. A water receiving hopper 506 is fixedly mounted on the surface of the sliding frame 502 and is fixedly connected to the inlet end of the water pump 503. A water storage hopper 507 is fixedly mounted on the side wall of the pulp box body 1. Several solenoid valves 508 are fixedly connected to the surface of the water storage hopper 507. A through-beam photoelectric sensor 509 is fixedly mounted on the outer wall of the water receiving hopper 506. A motor 510 is fixedly mounted on the surface of the sliding frame 502. A gear 511 is fixedly mounted on the output end of the motor 510. The gear 511 is rotatably connected to the sliding frame 502. A rack 512 that meshes with the gear 511 is fixedly mounted on the outer wall of the support frame 501. A water pump 503... Solenoid valve 508, through-beam photoelectric sensor 509, and motor 510 are all electrically connected to controller 6. When it is necessary to clean the slurry accumulated on the surface of upper lip plate 3, controller 6 starts motor 510. Motor 510 drives gear 511 to rotate. Gear 511 meshes with rack 512, thereby driving sliding frame 502 to slide along the inner wall of support frame 501, allowing nozzle 505 to move horizontally. During this process, solenoid valve 508 will block through-beam photoelectric sensors 509 one by one. The through-beam photoelectric sensor 509 transmits a signal to the controller 6, which then activates the corresponding solenoid valve 508. The clean water in the water storage tank 507 flows into the water receiving tank 506 through the solenoid valve 508. The water pump 503 then draws the clean water from the water receiving tank 506 and delivers it to the water distribution pipe 504. Finally, the water is sprayed out through the nozzle 505 to wash away the slurry adhering to the surface of the upper lip plate 3. The horizontally moving sliding frame 502 achieves a comprehensive cleaning of the slurry on the entire surface of the upper lip plate 3.

[0020] In the above solution, rinsing with water alone is insufficient to completely remove stubborn slurry from the surface of the upper lip plate 3. Therefore, in this embodiment, a frame 513 is fixedly mounted on the circumferential surface of the water distribution pipe 504, and a brush plate 514 is slidably connected to the inner wall of the frame 513. While the nozzle 505 sprays water for cleaning, the brush plate 514 moves with the sliding frame 502 to physically scrub the stubborn slurry that is difficult to remove with water, further improving the cleaning effect and ensuring that there is no residual slurry on the surface of the upper lip plate 3.

[0021] To prevent the brush plate 514 from falling out of the retaining frame 513 during the brushing process, this embodiment has a pin 515 that slides through the retaining frame 513. The pin 515 slides through the brush plate 514. The pin 515 can restrict the position of the brush plate 514 within the retaining frame 513, preventing the brush plate 514 from falling out of the retaining frame 513 due to vibration or friction, and ensuring stable brushing operation.

[0022] After prolonged use, the brush plate 514 is prone to wear and tear, requiring periodic replacement. To facilitate brush plate 514 replacement, this embodiment includes a first spring 516 fitted around the circumference of the pin 515. The two ends of the first spring 516 are fixedly connected to the pin 515 and the retaining frame 513, respectively. During replacement, simply pull the pin 515 outwards to disengage it from the brush plate 514, allowing the old brush plate 514 to be removed and replaced with a new one. After releasing the pin 515, the first spring 516 will use its own elasticity to pull the pin 515 back to its original position, allowing it to re-enter the new brush plate 514 and complete the fixation. The operation is convenient and efficient.

[0023] During the sliding of the sliding frame 502 along the support frame 501, it is prone to impacting the end of the support frame 501 due to excessive sliding speed, causing damage and deformation to both the sliding frame 502 and the support frame 501. To solve this problem, in this embodiment, a sliding rod 517 slides through the support frame 501. A force-bearing plate 518 is fixedly mounted at one end of the sliding rod 517, and a second spring 519 is sleeved on the surface of the sliding rod 517. The two ends of the second spring 519 are fixedly connected to the force-bearing plate 518 and the support frame 501, respectively. When the sliding frame 502 slides to the end of the support frame 501, it will contact the force-bearing plate 518. The force-bearing plate 518 pushes the sliding rod 517 to move, and the second spring 519 is compressed and generates a reverse elastic force, which plays a buffering and shock-absorbing role for the sliding frame 502, reducing the impact force on the sliding frame 502.

[0024] To prevent the slide bar 517 from rotating during sliding, which would cause the force plate 518 to shift position, this embodiment designs the slide bar 517 as a regular hexagonal prism structure. The regular hexagonal prism structure can restrict the rotational freedom of the slide bar 517, ensuring that the slide bar 517 always slides in a straight line, and the force plate 518 can also maintain a stable force angle, thereby continuously exerting a buffering and shock absorption effect.

[0025] Furthermore, in this embodiment, a roughened plate 520 is fixedly mounted on the surface of the force-bearing plate 518, and the roughened plate 520 abuts against the inner wall of the support frame 501. The roughened plate 520 can increase the friction between the force-bearing plate 518 and the inner wall of the support frame 501, further slowing down the sliding speed of the slide bar 517 and enhancing the buffering effect.

[0026] In the description of this utility model, the terms "first," "second," "another," and "yet another" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0028] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A headbox device for producing kraft paperboard, comprising a pulp box body (1), wherein a lower lip plate (2) is fixedly mounted on the pulp outlet end of the pulp box body (1), an upper lip plate (3) is hinged to the side wall of the pulp box body (1), an electric actuator (4) is rotatably connected to the side wall of the pulp box body (1), the output end of the electric actuator (4) is rotatably connected to the upper lip plate (3), and a controller (6) is fixedly mounted on the side wall of the pulp box body (1), characterized in that: The surface of the lower lip plate (2) is provided with a cleaning structure (5), the cleaning structure (5) includes a support frame (501) fixedly installed on the surface of the lower lip plate (2), and a sliding frame (502) is slidably connected to the inner wall of the support frame (501). A water pump (503) is fixedly mounted on the surface of the sliding frame (502). A water distribution pipe (504) is fixedly mounted on the discharge end of the water pump (503). Several nozzles (505) are fixedly connected to the circumferential surface of the water distribution pipe (504). A water receiving hopper (506) fixedly connected to the inlet end of the water pump (503) is fixedly mounted on the surface of the sliding frame (502). A water storage hopper (507) is fixedly mounted on the side wall of the pulp box body (1). Several solenoid valves (508) are fixedly connected to the surface of the water storage hopper (507). A through-beam photoelectric sensor (509) is fixedly mounted on the outer wall of the water receiving hopper (506). The sprayed water can clean the slurry adhering to the surface of the upper lip plate (3).

2. The headbox device for kraft paper production according to claim 1, characterized in that: The circumferential surface of the water distribution pipe (504) is fixedly fitted with a frame (513), and the inner wall of the frame (513) is slidably connected with a brush plate (514).

3. The headbox device for kraft paper production according to claim 2, characterized in that: A pin (515) slides through the card frame (513), and the pin (515) slides through the brush plate (514).

4. A headbox device for kraft paper production according to claim 3, characterized in that: The circumferential surface of the pin (515) is fitted with a first spring (516), and the two ends of the first spring (516) are fixedly connected to the pin (515) and the frame (513) respectively.

5. A headbox apparatus for kraft paper production according to any one of claims 1-4, characterized in that: A sliding rod (517) slides through the support frame (501). A force plate (518) is fixedly mounted on one end of the sliding rod (517). A second spring (519) is sleeved on the surface of the sliding rod (517). The two ends of the second spring (519) are fixedly connected to the force plate (518) and the support frame (501) respectively.

6. A headbox device for kraft paper production according to claim 5, characterized in that: The slide bar (517) has a regular hexagonal prism structure.

7. A headbox device for kraft paper production according to claim 6, characterized in that: A rough plate (520) is fixedly mounted on the surface of the load-bearing plate (518), and the rough plate (520) abuts against the inner wall of the support frame (501).

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