Headbox for papermaking

Abstract

The utility model discloses a headbox for papermaking, which relates to the field of paper production and comprises a headbox body, end plates are mounted at one end of the headbox body, an upper lip plate is connected to one end of the headbox body in an up-down sliding manner, the upper lip plate is connected to the inner sides of the two end plates in an up-down sliding manner, a lower lip plate is fixedly connected to one end of the headbox body, and the lower lip plate is connected to the inner sides of the two end plates in an up-down sliding manner. The lower lip plate is located between the two end plates, the lower lip plate is located below the upper lip plate, and a channel allowing slurry to flow out is formed between the lower lip plate and the upper lip plate; a connecting mechanism for driving the upper lip plate to slide up and down is mounted at the top end of the headbox, and the connecting mechanism comprises a rotating assembly and an axial moving assembly. Through the arrangement of the connecting mechanism, the purpose of adjusting the upper lip plate is achieved, meanwhile, the acting force acting on the threaded rod can be reduced, and therefore abrasion of the threaded rod in the action process is reduced, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of paper production, in particular to a headbox for papermaking. Background Art

[0002] During the paper production process, the channel between the upper and lower lips at the end of the headbox is used to allow the slurry to flow out, and then the paper is formed through extrusion and drying. When producing paper of different thicknesses, the channel needs to be adjusted to meet the production of paper of different thicknesses. In the existing technology, multiple screws are generally synchronously connected to the upper lip. The upper lip is heavy, and the gravity of the upper lip is directly dispersed on multiple screws, which will cause the screws to wear more severely during operation, thereby reducing their service life. Utility Model Content

[0003] The purpose of the present utility model is to provide a headbox for papermaking in order to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a headbox for papermaking, comprising a headbox, an end plate being installed at one end of the headbox, an upper lip plate being slidably connected to one end of the headbox, the upper lip plate being slidably connected to the inner sides of the two end plates, a lower lip plate being fixedly connected to one end of the headbox, the lower lip plate being located between the two end plates and below the upper lip plate, and a channel for slurry to flow out being defined between the lower lip plate and the upper lip plate;

[0005] A connecting mechanism for driving the upper lip plate to slide up and down is installed at the top of the headbox. The connecting mechanism includes a rotating assembly and an axial moving assembly. The axial moving assembly is connected to the output end of the rotating assembly.

[0006] As a further solution of the present invention: the rotating assembly includes two groups of fixed ears fixedly connected to the top of the headbox, a screw is rotatably installed between the two groups of fixed ears, one end of the screw is connected to a synchronous wheel, and adjacent synchronous wheels are connected by a synchronous belt transmission. A forward and reverse motor is installed on the top of the headbox, and the output shaft of the forward and reverse motor is connected to the center of the end face of a group of synchronous wheels.

[0007] As a further solution of the present invention: the axial moving assembly includes a synchronous plate threadedly connected to the outer walls of multiple screws, one end of the synchronous plate is fixedly connected to multiple moving plates, the bottom end of the moving plate is fixedly connected to a slider, and the top end of the flow box is fixedly connected to a slide rail for the slider to slide.

[0008] As a further solution of the present invention: the axial moving assembly also includes a guide groove opened at one end of the moving plate and extending to the other end of the moving plate, the guide groove has an inclined structure, the inner wall of the guide groove is movably connected to a sliding shaft, and the two ends of the sliding shaft are fixedly connected to connecting ears, and the connecting ears are fixedly connected to the top end of the upper lip plate.

[0009] As a further solution of the present invention: a sealing ring is provided at the connection position between the headbox, the end plate and the slide rail, and the sealing ring is used to prevent slurry from leaking from the contact position between the headbox, the end plate and the slide rail.

[0010] As a further solution of the present invention: the vertical cross-section of the slider is a "convex" structure, and ball grooves are opened in the protruding parts of the two wings of the slider, and the inner walls of the ball grooves are movably connected with balls, and the outer periphery of the balls contacts the inner wall of the slide rail.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] By providing a connecting mechanism, the force acting on the screw can be reduced while achieving the purpose of adjusting the upper lip plate, thereby reducing the wear of the screw during the operation process and improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic structural diagram of the connecting mechanism of the present invention;

[0015] Figure 3 This is a structural schematic diagram of the connecting mechanism of the present invention from another perspective;

[0016] Figure 4 This is a schematic diagram of the internal structure of the slider of the present utility model.

[0017] In the figure: 1. headbox; 2. end plate; 3. lower lip plate; 4. upper lip plate; 5. slide rail; 6. slider; 7. movable plate; 8. guide groove; 9. connecting ear; 10. fixing ear; 11. screw; 12. synchronous plate; 13. synchronous pulley; 14. synchronous belt; 15. forward and reverse motor; 16. ball groove; 17. ball. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figures 1 to 4 In an embodiment of the utility model, a headbox for papermaking includes a headbox 1, one end of the headbox 1 is installed with an end plate 2, one end of the headbox 1 is connected to an upper lip plate 4 for sliding up and down, the upper lip plate 4 is connected to the inner sides of the two end plates 2 for sliding up and down, one end of the headbox 1 is fixedly connected to a lower lip plate 3, the lower lip plate 3 is located between the two end plates 2, and the lower lip plate 3 is located below the upper lip plate 4, and a channel for slurry to flow out is provided between the lower lip plate 3 and the upper lip plate 4; a connecting mechanism for driving the upper lip plate 4 to slide up and down is installed at the top of the headbox 1, the connecting mechanism includes a rotating component and an axial moving component, and the axial moving component is connected to the output end of the rotating component.

[0020] In this embodiment, when adjusting the outflow channel according to the thickness of the paper, the rotating assembly is first started, and the rotating assembly drives the axial moving assembly to move and slide axially. The sliding axial sliding assembly drives the upper lip plate 4 to adjust in the up and down directions. At this time, the thickness of the flow channel between the upper lip plate 4 and the lower lip plate 3 changes, thereby adjusting the thickness of the produced paper.

[0021] Please refer to Figure 2 and Figure 3 The rotating assembly includes two groups of fixed ears 10 fixedly connected to the top of the headbox 1, a screw 11 is rotatably installed between the two groups of fixed ears 10, one end of the screw 11 is connected to a synchronous wheel 13, and adjacent synchronous wheels 13 are connected by a synchronous belt 14. A forward and reverse motor 15 is installed on the top of the headbox 1, and the output shaft of the forward and reverse motor 15 is connected to the center of the end face of a group of synchronous wheels 13.

[0022] In this embodiment, by starting the forward and reverse motor 15, the forward and reverse motor 15 drives the synchronous wheel 13 connected thereto to rotate, and the synchronous wheel 13 drives other synchronous wheels 13 to rotate synchronously and in the same direction through the synchronous belt 14.

[0023] Please refer to Figure 2 and Figure 3The axial moving assembly includes a synchronous plate 12 threadedly connected to the outer wall of a plurality of screws 11, one end of the synchronous plate 12 is fixedly connected to a plurality of moving plates 7, the bottom end of the moving plate 7 is fixedly connected to a slider 6, and the top of the headbox 1 is fixedly connected to a slide rail 5 for sliding the slider 6. The axial moving assembly also includes a guide groove 8 opened at one end of the moving plate 7 and extending to the other end of the moving plate 7. The guide groove 8 has an inclined structure, and the inner wall of the guide groove 8 is movably connected to a sliding shaft. Both ends of the sliding shaft are fixedly connected to connecting ears 9, and the connecting ears 9 are fixedly connected to the top of the upper lip plate 4.

[0024] In this embodiment, multiple sets of synchronous wheels 13 rotate synchronously, and the synchronous wheels 13 respectively drive the screws 11 connected thereto to rotate synchronously. At this time, the synchronous plate 12 moves axially along the outer wall of the screw 11 under its internal thread. The axially moving synchronous plate 12 synchronously pushes multiple movable plates 7 to move synchronously, and the guide groove 8 in the movable plate 7 moves accordingly. Then, the sliding shaft is squeezed by the guide groove 8, and the sliding shaft moves in the up and down direction. The sliding shaft drives the upper lip plate 4 to move up and down through the connecting ear 9, thereby achieving the purpose of up and down adjustment of the upper lip plate 4.

[0025] With this mechanical structure design, the gravity of the upper lip plate 4 directly acts on multiple movable plates 7, and the movable plates 7 disperse the force on the slide rails 5 and the screw 11, avoiding the screw 11 from directly bearing the gravity of the upper lip plate 4 and ensuring the service life of the screw 11.

[0026] Please refer to Figure 1 A sealing ring is provided at the joint position of the headbox 1, the end plate 2 and the slide rail 5. The sealing ring is used to prevent the slurry from leaking from the contact position of the headbox 1, the end plate 2 and the slide rail 5.

[0027] In this embodiment, this design can prevent slurry from leaking from the contact position between the headbox 1, the end plate 2 and the slide rail 5.

[0028] Please refer to Figure 4 The vertical section of the slider 6 is a "convex" structure, and ball grooves 16 are opened in the protruding parts of the two wings of the slider 6. The inner wall of the ball groove 16 is movably connected with a ball 17, and the outer periphery of the ball 17 contacts the inner wall of the slide rail 5.

[0029] In this embodiment: the movable plate 7 disperses part of the gravity of the upper lip plate 4 to the slider 6, the slider 6 applies an extrusion force to the bottom end of the inner wall of the slide rail 5, and the ball 17 can effectively avoid the phenomenon of increased wear of the slider 6 during movement due to excessive resistance.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A headbox for papermaking, comprising a headbox (1), characterized in that: An end plate (2) is installed at one end of the headbox (1), an upper lip plate (4) is slidably connected to one end of the headbox (1), and the upper lip plate (4) is slidably connected to the inner sides of the two end plates (2). A lower lip plate (3) is fixedly connected to one end of the headbox (1), and the lower lip plate (3) is located between the two end plates (2), and the lower lip plate (3) is located below the upper lip plate (4). A channel for slurry to flow out is provided between the lower lip plate (3) and the upper lip plate (4); A connecting mechanism for driving the upper lip plate (4) to slide up and down is installed at the top end of the headbox (1), wherein the connecting mechanism comprises a rotating assembly and an axially movable assembly, and the axially movable assembly is connected to the output end of the rotating assembly.

2. A papermaking headbox according to claim 1, characterized in that: The rotating assembly comprises two groups of fixed ears (10) fixedly connected to the top of the headbox (1), a screw (11) is rotatably installed between the two groups of fixed ears (10), one end of the screw (11) is connected to a synchronous wheel (13), and adjacent synchronous wheels (13) are connected to each other through a synchronous belt (14), and a forward and reverse motor (15) is installed on the top of the headbox (1), and the output shaft of the forward and reverse motor (15) is connected to the center of the end face of a group of synchronous wheels (13).

3. A papermaking headbox according to claim 2, characterized in that: The axial movement assembly comprises a synchronous plate (12) threadedly connected to the outer walls of the plurality of screw rods (11), one end of the synchronous plate (12) is fixedly connected to a plurality of moving plates (7), the bottom end of the moving plate (7) is fixedly connected to a slider (6), and the top end of the headbox (1) is fixedly connected to a slide rail (5) for the slider (6) to slide.

4. A papermaking headbox according to claim 3, characterized in that: The axial moving assembly further includes a guide groove (8) opened at one end of the moving plate (7) and extending to the other end of the moving plate (7), wherein the guide groove (8) is an inclined structure, and the inner wall of the guide groove (8) is movably connected to a sliding shaft, and both ends of the sliding shaft are fixedly connected to connecting ears (9), and the connecting ears (9) are fixedly connected to the top end of the upper lip plate (4).

5. A papermaking headbox according to claim 4, characterized in that: A sealing ring is provided at the contact position between the headbox (1), the end plate (2) and the slide rail (5), and the sealing ring is used to prevent slurry from leaking from the contact position between the headbox (1), the end plate (2) and the slide rail (5).

6. A papermaking headbox according to claim 5, characterized in that: The vertical cross-section of the slider (6) is a "convex" structure, and ball grooves (16) are provided in the protruding parts of the two wings of the slider (6). The inner wall of the ball groove (16) is movably connected to a ball (17), and the outer periphery of the ball (17) contacts the inner wall of the slide rail (5).

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