Headbox for papermaking
By setting up a mobile connecting plate and elastic parts in the pulp box for papermaking, the pulp discharge speed is controlled, and the intermittent and uniform discharge of the pulp is achieved by using motor drive, the problem of uneven pulp flow rate in the pulp box is solved, and the uniformity of paper quality and the efficiency of the papermaking process are improved.
Patent Information
- Application Number
- CN202421691687.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-17
AI Technical Summary
In the existing papermaking process, the pulp flow rate in the pulp box is uneven, resulting in the paper being inconsistent in the mesh forming process, affecting the quality of the paper.
A pulp box for papermaking is designed. By providing a first connecting plate, a fixing frame and a first elastic member in the pulp box, the first connecting plate is driven upward by using a wedge-shaped block and the second connecting plate, the pulp is discharged at a pulp, and the intermittent and uniform discharge of the pulp is achieved through a motor driving the toggle rod and the connecting cylinder.
Accurate control of the pulp discharge speed is achieved, uniformity of paper quality is ensured, and uniform discharge of pulp is achieved through intermittent discharge, improving the efficiency of the papermaking process.
Smart Images
Figure CN223003220U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of papermaking, in particular to a headbox for papermaking. Background Art
[0002] The headbox is a key part of a modern paper machine, and its structure and performance play a decisive role in the formation of paper sheets and the quality of paper. Therefore, higher requirements are imposed on the headbox during papermaking.
[0003] In the existing papermaking process, when the pulp flows out of the headbox used, if the pulp flow rate in the headbox is uneven, it is easy to cause the situation that the front and back papers are different during the forming process of the pulp on the wire section.
[0004] Therefore, we need to develop a headbox for papermaking that can control the feeding speed of the pulp to make the paper quality uniform. Summary of the Utility Model
[0005] In order to overcome the defect that the front and back papers are different during the forming process of the pulp on the wire section in the prior art, the utility model provides a headbox for papermaking that can control the feeding speed of the pulp to make the paper quality uniform.
[0006] A headbox for papermaking includes a support frame, a headbox, a cover plate, a first connecting plate, a fixing frame and a first elastic member. The upper part of the support frame is connected with the headbox. The bottom of the headbox is provided with a discharge port. The top of the headbox is connected with the cover plate. The first connecting plate is slidably connected inside the headbox and is slidably connected with the cover plate. The first connecting plate is stuck on the headbox. When the first connecting plate moves upward, it is staggered from the headbox. Fixing frames are fixedly connected to both the left and right sides inside the headbox. The first connecting plate is slidably connected with the fixing frames. The fixing frames are symmetrically connected with the first elastic members at both the front and back parts. The upper and lower ends of the first elastic members are respectively connected with the first connecting plate and the fixing frames.
[0007] More preferably, it further includes a wedge block, a second connecting plate and a second elastic member. The second connecting plate is slidably connected to the upper rear part of the headbox. Wedge blocks are fixedly connected to both the left and right sides of the front part of the second connecting plate. The wedge blocks are located behind the first connecting plate. The second elastic members are wound around both the left and right parts of the second connecting plate. The front and back ends of the second elastic members are respectively connected with the headbox and the second connecting plate.
[0008] More preferably, it also includes a motor, a toggle rod, a connecting tube, a fixed rod and a third elastic member. The motor is installed on the lower left side of the flow box, and the toggle rod is fixedly connected to the right side of the motor output shaft. The toggle rod rotatably penetrates into the lower part of the flow box. The left and right sides of the bottom of the flow box are respectively connected to the fixed rods, and the connecting tube is slidably connected between the fixed rods. The connecting tube is located at the discharge port at the bottom of the flow box, and the third elastic member is wound around the fixed rods. The upper and lower ends of the third elastic member are respectively connected to the connecting tube and the fixed rod.
[0009] More preferably, a cover is further included, and the cover is clamped in the middle of the cover plate.
[0010] More preferably, a handle is connected to the top of the lid.
[0011] More preferably, both the front and rear sides of the bottom of the headbox are inclined inwardly and downwardly.
[0012] The utility model has the following advantages: 1. By pushing the second connecting plate forward, the wedge block is driven to move forward, thereby pushing the first connecting plate upward. In this way, by controlling the height of the first connecting plate moving upward, the speed of pulp feeding can be controlled to make the pulp quality uniform.
[0013] 2. By starting the motor, the toggle rod is driven to rotate, and the toggle rod and the connecting tube cooperate to drive the connecting tube to move up and down, so as to achieve intermittent and uniform discharge of pulp. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.
[0015] Figure 2 This is a sectional view of the first partial three-dimensional structure of the utility model.
[0016] Figure 3 This is a sectional view of a second partial three-dimensional structure of the utility model.
[0017] The markings of the components in the accompanying drawings are as follows: 1. support frame, 2. flow box, 3. cover plate, 4. cover, 5. first connecting plate, 6. fixing frame, 7. first elastic member, 8. wedge block, 9. second connecting plate, 10. second elastic member, 11. motor, 12. toggle rod, 13. connecting tube, 14. fixing rod, 15. third elastic member. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] Embodiment 1: A headbox for papermaking, such as Figure 1 and Figure 2 As shown, it includes a support frame 1, a flow box 2, a cover plate 3, a lid 4, a first connecting plate 5, a fixing frame 6 and a first elastic member 7. The upper part of the support frame 1 is connected to the flow box 2, and a discharge port is opened at the bottom of the flow box 2. The front and rear sides of the bottom of the flow box 2 are inclined inward and downward. The top of the flow box 2 is connected to the cover plate 3, and the middle part of the cover plate 3 is clamped with the lid 4. The top of the lid 4 is connected to a handle. The inside of the flow box 2 is slidably connected with the first connecting plate 5, and the first connecting plate 5 is clamped on the flow box 2. By moving the first connecting plate 5 upward to stagger with the flow box 2, the pulp can flow downward smoothly. The left and right sides of the headbox 2 are fixedly connected to the fixing frame 6, and the fixing frame 6 is slidably connected to the first connecting plate 5. There are four first elastic members 7, and the first elastic members 7 are wound around the front and rear sides of the fixing frame 6. The upper and lower ends of the first elastic member 7 are respectively connected to the first connecting plate 5 and the fixing frame 6.
[0020] like Figure 2 As shown, it also includes a wedge block 8, a second connecting plate 9 and a second elastic member 10. The second connecting plate 9 is slidably connected to the upper rear part of the headbox 2, and the left and right sides of the front part of the second connecting plate 9 are fixedly connected with wedge blocks 8. The wedge blocks 8 are all located behind the first connecting plate 5. By pushing the wedge blocks 8 forward, the first connecting plate 5 can be lifted up, and the pulp can flow downward. Two second elastic members 10 are provided, and the left and right parts of the second connecting plate 9 are both wrapped with the second elastic members 10. The front and rear ends of the second elastic member 10 are respectively connected to the headbox 2 and the second connecting plate 9.
[0021] When people need to make paper, the headbox can be used for papermaking. First, the user can hold the handle to lift the cover 4 upward to open it, pour the pulp into the headbox 2, and then cover the cover 4. In the initial state, the first elastic member 7 is in a normal state, the first connecting plate 5 is stuck on the headbox 2, and the pulp does not flow downward. When the pulp needs to flow downward, the user can push the second connecting plate 9 forward, thereby driving the wedge block 8 to move forward, the second elastic member 10 is compressed, and the wedge block 8 moves forward to push the first connecting plate 5 upward, the first elastic member 7 is stretched, and the first connecting plate 5 The first connecting plate 5 is no longer stuck on the headbox 2, so that the first connecting plate 5 is connected to the headbox 2, and the pulp can flow downward. In this way, by controlling the height of the first connecting plate 5 moving upward, the speed of the pulp flowing downward can be controlled, so that the quality of paper is uniform. After the pulp in the headbox 2 is discharged, the second connecting plate 9 is released, and the second elastic member 10 is reset, thereby driving the second connecting plate 9 to move backward. The second connecting plate 9 moves backward and drives the wedge block 8 to move backward. The wedge block 8 moves backward and no longer contacts the first connecting plate 5. Under the action of gravity, the first connecting plate 5 moves downward and resets.
[0022] Embodiment 2: Based on embodiment 1, Figure 2 and Figure 3 As shown, it also includes a motor 11, a toggle rod 12, a connecting tube 13, a fixed rod 14 and a third elastic member 15. The motor 11 is installed on the lower left side of the headbox 2, and the toggle rod 12 is fixedly connected to the right side of the output shaft of the motor 11. The toggle rod 12 rotatably penetrates into the lower part of the headbox 2. By starting the motor 11, the toggle rod 12 can be driven to rotate. The left and right sides of the bottom of the headbox 2 are connected with fixed rods 14, and the connecting tube 13 is slidably connected between the fixed rods 14 on the left and right sides. The toggle rod 12 cooperates with the connecting tube 13, so that the pulp can be discharged intermittently and automatically. The third elastic member 15 is wound around the fixed rod 14, and the upper and lower ends of the third elastic member 15 are respectively connected to the connecting tube 13 and the fixed rod 14.
[0023] When the pulp needs to be discharged evenly, the user can start the motor 11, and the output shaft of the motor 11 rotates to drive the toggle rod 12 to rotate. When the toggle rod 12 rotates to contact with the connecting tube 13, the connecting tube 13 is squeezed to move downward, and the third elastic member 15 is compressed. The connecting tube 13 moves downward and no longer blocks the pulp. The pulp can move downward to be discharged. When the toggle rod 12 rotates to lose contact with the connecting tube 13, the third elastic member 15 is reset, and the connecting tube 13 moves upward and resets. In this way, the pulp can be discharged intermittently and automatically to achieve uniform discharge. When the discharge of the pulp is completed, the motor 11 is turned off.
[0024] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.
Claims
1. A headbox for papermaking, characterized in that: The invention comprises a support frame (1), a flow box (2), a cover plate (3), a first connecting plate (5), a fixing frame (6) and a first elastic member (7); the upper part of the support frame (1) is connected to the flow box (2); the bottom of the flow box (2) is provided with a discharge port; the top of the flow box (2) is connected to the cover plate (3); the interior of the flow box (2) is slidably connected to the first connecting plate (5); the first connecting plate (5) and the cover plate (3) are slidably connected; the first connecting plate (5) is clamped on the flow box (2); the first connecting plate (5) moves upward to be staggered with the flow box (2); the left and right sides of the flow box (2) are fixedly connected to the fixing frame (6); the first connecting plate (5) and the fixing frame (6) are slidably connected; the fixing frame (6) is symmetrically connected to the first elastic member (7) at the front and rear parts; the upper and lower ends of the first elastic member (7) are respectively connected to the first connecting plate (5) and the fixing frame (6).
2. A headbox for papermaking as claimed in claim 1, characterized in that: The invention also comprises a wedge block (8), a second connecting plate (9) and a second elastic member (10); the second connecting plate (9) is slidably connected to the upper rear portion of the headbox (2); the left and right sides of the front portion of the second connecting plate (9) are fixedly connected to the wedge block (8); the wedge block (8) is located behind the first connecting plate (5); the second elastic member (10) is wound around the left and right portions of the second connecting plate (9); and the front and rear ends of the second elastic member (10) are respectively connected to the headbox (2) and the second connecting plate (9).
3. A headbox for papermaking as claimed in claim 2, characterized in that: The invention also comprises a motor (11), a toggle rod (12), a connecting tube (13), a fixed rod (14) and a third elastic member (15). The motor (11) is installed on the lower left side of the headbox (2). The toggle rod (12) is fixedly connected to the right side of the output shaft of the motor (11). The toggle rod (12) is rotatably inserted into the lower part of the headbox (2). The left and right sides of the bottom of the headbox (2) are respectively connected to the fixed rods (14). The connecting tube (13) is slidably connected between the fixed rods (14). The connecting tube (13) is located at the discharge port at the bottom of the headbox (2). The third elastic member (15) is wound around the fixed rods (14). The upper and lower ends of the third elastic member (15) are respectively connected to the connecting tube (13) and the fixed rod (14).
4. A headbox for papermaking as claimed in claim 3, characterized in that: It also includes a cover (4), and the cover (4) is clamped in the middle of the cover plate (3).
5. A headbox for papermaking as claimed in claim 4, characterized in that: A handle is connected to the top of the cover (4).
6. A headbox for papermaking as claimed in claim 5, characterized in that: Both the front and rear sides of the bottom of the headbox (2) are inclined inwardly and downwardly.