Full-flow type headbox

Abstract

The full-flow type headbox comprises a hoisting mechanism, a headbox body, a pulp inlet mechanism, an upper lip plate assembly and a control mechanism, the hoisting mechanism is connected to the top of the headbox body, the pulp inlet mechanism and the upper lip plate assembly are arranged on the pulp inlet side and the pulp outlet side of the headbox body respectively, and a lower lip plate is arranged on the pulp outlet side of the headbox body; the upper lip plate assembly is located above the lower lip plate, the bottom of the upper lip plate assembly is provided with a flat pulp outlet face, the upper lip plate assembly is rotationally connected with the upper portion of the pulp outlet side of the headbox body on the first side of the pulp outlet face, a pulp outlet cavity is formed between the pulp outlet face and the lower lip plate, and the control mechanism is arranged at the top of the headbox body and connected with the upper lip plate assembly. And the control mechanism is suitable for enabling the upper lip plate assembly to rotate so as to change the shrinkage amplitude of the pulp outlet cavity in the pulp outlet direction, and the suspension type pulp outlet device has the advantage of being compact in structure, more space of a production line can be saved through a suspension installation mode, and the suspension type pulp outlet device has better installation applicability and adjustability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pulping and papermaking, in particular to a full-flow headbox. BACKGROUND

[0002] The headbox is the core component of the papermaking machine, which realizes the uniform distribution and accurate injection of the pulp through the coordinated action of the three parts of the pulp distributor, weir pool and weir plate. Its structure contains components such as turbulence generator and dilution water device, which can adjust the pulp flow rate, pressure and fiber dispersion, and directly affects the paper basis weight distribution and strength performance. It is mainly divided into three types of open type, air cushion type and hydraulic type.

[0003] However, the existing headbox has the following defects: the traditional headbox is usually erected on the production line and needs to be supported by a rack, which occupies a large area and space, is complex to install, has poor adaptability, and is difficult to adjust and control conveniently due to the obstruction of the rack. SUMMARY

[0004] An object of the present application is to provide a full-flow headbox with a suspended installation layout and convenient adjustment.

[0005] To achieve the above object, the technical scheme adopted by the present application is as follows: a full-flow headbox, comprising a hoisting mechanism, a headbox main body, a pulp inlet mechanism, an upper lip plate assembly and a control mechanism, the hoisting mechanism is connected to the top of the headbox main body, the pulp inlet mechanism and the upper lip plate assembly are respectively arranged on the pulp inlet side and the pulp outlet side of the headbox main body, the pulp outlet side of the headbox main body is provided with a lower lip plate, the upper lip plate assembly is located above the lower lip plate, the bottom of the upper lip plate assembly has a flat pulp outlet surface, the upper lip plate assembly is rotationally connected to the upper part of the pulp outlet side of the headbox main body on the first side of the pulp outlet surface, a pulp outlet cavity is formed between the pulp outlet surface and the lower lip plate, the control mechanism is arranged on the top of the headbox main body and connected with the upper lip plate assembly, and the control mechanism is adapted to rotate the upper lip plate assembly to change the contraction amplitude of the pulp outlet cavity in the pulp outlet direction.

[0006] In some embodiments, the upper lip plate assembly includes a lip plate seat, a small lip plate and an adjusting mechanism, the number of the small lip plates and the adjusting mechanisms is multiple, the small lip plates and the adjusting mechanisms are uniformly arranged along the left and right side directions of the lip plate seat, the bottom of the lip plate seat is the pulp outlet surface, the lip plate seat is slidably arranged on the pulp outlet side of the lip plate seat, the adjusting mechanism is adapted to slide the small lip plate along a first direction and protrude from the pulp outlet surface, an included angle a is formed between the pulp outlet surface and the first direction, 30°≤a≤75°.

[0007] In some embodiments, the adjusting mechanism comprises an adjusting table, an adjusting hand wheel and an adjusting rod, the adjusting table and the adjusting hand wheel are connected with the upper part of the adjusting rod, the lower end of the adjusting rod is connected with the small lip plate, the adjusting hand wheel and the adjusting rod are adapted to be combined with a worm and a gear, the adjusting hand wheel is adapted to control the adjusting rod to move in a first direction, the adjusting table is adapted to amplify and display the adjusting stroke of the adjusting hand wheel; the small lip plate is adapted to be connected with the pulp discharge surface of the lip plate seat when the small lip plate protrudes from the pulp discharge surface.

[0008] In some embodiments, the upper lip plate assembly is provided with a dilution water adjusting device, the dilution water adjusting device comprises a plurality of water outlets and a plurality of sensing modules, the sensing modules are one-to-one matched and arranged at the adjusting mechanism, the water outlets are one-to-one matched and arranged at the side of the pulp discharge surface of the headbox body close to the headbox body, the sensing modules are adapted to sense the concentration of the pulp flowing through the small lip plate and control the water outlets to inject water into the initial part of the pulp discharge chamber; the adjusting hand wheel and the adjusting rod have low elastic activity, the sensing modules are adapted to sense the pressure transmitted by the small lip plate and fed back by the adjusting rod and control the water outlets to inject water into the initial part of the pulp discharge chamber; the lip plate seat is provided with a left and / or right opening containing channel, the dilution water adjusting device comprises a dilution pipeline, the dilution pipeline is adapted to penetrate along the containing channel and be connected with the water outlets, the dilution pipeline is adapted to rise and fall with the lip plate seat; the front end of the adjusting rod and the pulp discharge side of the lip plate seat are respectively provided with a limiting groove and a limiting part, the limiting groove and the limiting part are adapted to abut to limit the small lip plate to slide in the direction of protruding from the pulp discharge surface; the lip plate seat is provided with a blocking cover plate at the pulp discharge side of the small lip plate.

[0009] In some embodiments, the control mechanism comprises a control screw rod, a matched connecting sleeve and a control pull rod, the connecting sleeve is rotatably arranged at the top of the headbox body, the control screw rod and the control pull rod are both penetrated through the connecting sleeve and engaged in the connecting sleeve, the other end of the control pull rod is rotatably connected with the upper lip plate assembly, the control screw rod is adapted to rotate to make the control pull rod slide along the penetrating direction of the connecting sleeve to drive the upper lip plate assembly to rotate.

[0010] In some embodiments, the number of the connecting sleeves and the control pull rods is multiple, the connecting sleeves and the control pull rods are uniformly arranged along the left and right side directions of the headbox body, the rotation plane of the connecting sleeve is a vertical plane; one end of the control screw rod is provided with a control hand wheel.

[0011] In some embodiments, a turbulence generator is arranged in the headbox body, and two ends of the turbulence generator are connected to the pulp outlet side and the pulp inlet side of the headbox body. The turbulence generator is connected to the pulp outlet cavity of the headbox body. The pulp outlet position of the turbulence generator is arranged above the lower lip plate. The pulp outlet direction of the turbulence generator is towards the pulp outlet surface.

[0012] In some embodiments, the pulp inlet mechanism includes a hanging plate, a hanging rod, and a plurality of pulp inlet pipes. The left side and / or the right side of the hanging plate is provided with an inlet. The pulp inlet pipes extend from the inlet to above the hanging plate and are connected to the pulp inlet side of the headbox body. The two ends of the hanging rod are connected to the side of the hanging plate away from the headbox body and the top of the headbox body, respectively. The hanging plate is arranged obliquely, and the side of the hanging plate away from the headbox body is lower. The hanging plate extends upward to form a supporting portion. The supporting portion is adapted to limit the pulp inlet pipes from being separated from the hanging plate. The headbox body is provided with a sliding opening along the pulp inlet and outlet direction. The end of the hanging rod is connected to the sliding opening.

[0013] In some embodiments, the hoisting mechanism includes first and second telescopic hoisting arms. The upper ends of the first and second hoisting arms are fixedly connected to a support beam. The top of the headbox body is provided with a hoisting arm beam. The lower ends of the first and second hoisting arms are rotatably connected to the two ends of the hoisting arm beam.

[0014] In some embodiments, the first and second hoisting arms each include a first adjusting screw, a second adjusting screw, and an adjusting nut. The first ends of the first and second adjusting screws are connected to the support beam and the hoisting arm beam, respectively. The second ends of the first and second adjusting screws are connected to the adjusting nut in an axial manner. The adjusting nut is adapted to move the first and second adjusting screws closer or farther apart.

[0015] Compared with the prior art, the application has the following advantages: 1. The headbox of the application changes the overall structure, adjusts the overall layout to a hoisting structure layout, and adjusts the installation and adjustment mode of the upper lip plate assembly, thereby realizing the compactness and miniaturization of the overall equipment volume. The full-flow design can make the pulp fill the entire box space without a free surface, avoid unstable pulp flow and cross-section basis weight fluctuation caused by surface fluctuation, provide a stable pulp flow environment, and ensure the uniformity of the cross-section basis weight of the paper web. The redesigned upper lip plate assembly has multiple adjustment modes and a large adjustment range, efficiently and stably controls the run-off speed, angle, and flow of the pulp, and thus meets different production requirements.

[0016] 2、The headbox of the application is equipped with an intelligent automatic control system, which integrates a high-precision sensor network, can monitor the key parameters such as pressure, flow, concentration and pulp flow speed in the headbox in real time, and can quickly analyze and process these data in the background. Based on the processing results, the system can automatically and accurately adjust the lip opening, pulp circulation and dilution water release of the headbox, etc. Operation parameters to ensure that the headbox can maintain the best working state under various working conditions, thereby greatly improving the stability and reliability of the production process, reducing human operation errors, significantly reducing the scrap rate, improving production efficiency, and also reducing the labor intensity of the operating personnel, making the operation and maintenance of the headbox more convenient and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure view of the inlet side according to a preferred embodiment of the application.

[0018] Figure 2 is the overall structure view of the outlet side according to a preferred embodiment of the application.

[0019] Figure 3 is the initial state schematic diagram according to a preferred embodiment of the application.

[0020] Figure 4 is the running state schematic diagram according to a preferred embodiment of the application.

[0021] Figure 5 is the overall structure view of the inlet side according to a preferred embodiment of the application Figure 4 is the enlarged view of a in the

[0022] Figure 6 is the structure schematic diagram of the upper lip plate assembly provided with a dilution water adjusting device according to a preferred embodiment of the application.

[0023] Figure 7 is the arrangement schematic diagram of the control mechanism and the lifting mechanism according to a preferred embodiment of the application.

[0024] In the figure: 1, hoisting mechanism; 11, first hoist arm; 12, second hoist arm; 13, first adjusting screw; 14, second adjusting screw; 15, adjusting nut; 2, headbox main body; 21, lower lip plate; 22, sliding opening; 3, pulp feeding mechanism; 31, hoist plate; 311, inlet; 312, support part; 32, hoist rod; 33, pulp feeding pipe; 4, upper lip plate assembly; 41, lip plate seat; 411, pulp outlet surface; 412, containing channel; 413, limiting groove; 414, blocking cover plate; 42, small lip plate; 43, adjusting mechanism; 431, adjusting table; 432, adjusting hand wheel; 433, adjusting rod; 4331, limiting part; 44, water outlet; 45, induction module; 46, dilution pipeline; 5, control mechanism; 51, control screw; 52, connecting sleeve; 53, control pull rod; 54, control hand wheel; 6, support beam; 7, pulp outlet cavity; 71, pulp outlet; 8, turbulence generator. DETAILED DESCRIPTION

[0025] Hereinafter, the present application will be further described in conjunction with specific embodiments, and it should be noted that the following described embodiments between or between technical features can be combined to form new embodiments without conflict.

[0026] In the description of the present application, it should be noted that for orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The orientation and positional relationship shown in the drawing is based on the orientation or positional relationship, and is only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0028] The terms "include" and "have" in the specification and claims of the present application, as well as any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] The present application will be further described below in conjunction with the drawings: As Figures 1 to 7As shown, this application provides a full-flow headbox, including a hoisting mechanism 1, a headbox body 2, a feed mechanism 3, an upper lip plate assembly 4, and a control mechanism 5. The hoisting mechanism 1 is connected to the top of the headbox body 2 and is used to connect with structures such as support beams 6 that are originally present or additionally arranged above the production line. The feed mechanism 3 and the upper lip plate assembly 4 are respectively arranged on the feed side and the discharge side of the headbox body 2. The discharge side of the headbox body 2 cooperates with the paper machine and can feed pulp onto the paper machine for papermaking.

[0030] The headbox body 2 has a lower lip plate 21 on the discharge side, and an upper lip plate assembly 4 is located above the lower lip plate 21. The bottom of the upper lip plate assembly 4 has a flat discharge surface 411. The upper lip plate assembly 4 is rotatably connected to the upper part of the discharge side of the headbox body 2 on the first side of the discharge surface 411. The discharge surface 411 and the lower lip plate 21 are adapted to form a discharge cavity 7. The control mechanism 5 is located on the top of the headbox body 2 and connected to the upper lip plate assembly 4. The control mechanism 5 is adapted to rotate the upper lip plate assembly 4 to change the contraction amplitude of the discharge cavity 7 in the discharge direction.

[0031] It is worth noting that the headbox body 2 has side plates arranged on the left and right sides of the lower lip plate 21 to cooperate in forming the headbox 7.

[0032] Specifically, when the upper lip plate assembly 4 rotates, it can change the distance between the second side of the slurry outlet surface 411, which is opposite to the first side, and the lower lip plate 21, that is, change the size of the slurry outlet 71 formed between the slurry outlet surface 411 and the lower lip plate 21, so as to control the on-line speed and flow rate of the slurry.

[0033] It is understandable that by controlling and adjusting the upper lip plate assembly 4 as a whole relative to the lower lip plate 21, the overall mass of the upper lip plate assembly 4 can be used to improve the stability of the headbox discharge, so as to effectively resist the vibration caused by the reaction force when the headbox discharges from the headbox 7, thereby achieving stable headbox discharge under the condition of a small volume structure design, laying the foundation for the hoisting application of the headbox.

[0034] In some embodiments, the pulp outlet surface 411 is a plane, which can effectively reduce the free surface in the pulp outlet chamber 7, avoid pulp flow instability and width basis weight fluctuation caused by surface fluctuation, reduce the generation of air bubbles, provide a stable flow environment for pulp, and ensure the uniformity of paper width basis weight.

[0035] like Figure 5In the illustrated embodiment, the upper lip plate assembly 4 includes a lip plate seat 41, a small lip plate 42, and an adjustment mechanism 43. There are multiple small lip plates 42 and adjustment mechanisms 43. The small lip plates 42 and adjustment mechanisms 43 are evenly arranged along the left and right sides of the lip plate seat 41 in a coordinated manner to uniformly regulate and control the flow rate of the pulp outlet 71, ensuring the uniformity of the basis weight of the paper sheet. The bottom of the lip plate seat 41 is the pulp outlet surface 411. The lip plate seat 41 is slidably disposed on the pulp outlet side of the lip plate seat 41. The adjustment mechanism 43 is adapted to make the small lip plate 42 slide along the first direction and protrude from the pulp outlet surface 411.

[0036] Meanwhile, in order to ensure that the small lip plate 42 has less impact on the smoothness of the slurry flow, the slurry outlet surface 411 forms an angle α with the first direction, 30°≤α≤75°. The small lip plate 42 is tilted towards the slurry flow direction to guide the slurry flow. At the same time, a certain angle can increase the adjustment rate of the cross-sectional area of ​​the small lip plate 42 at the slurry outlet 71, thereby improving the efficiency of flow control.

[0037] Furthermore, when the small lip plate 42 protrudes from the slurry outlet surface 411, it is suitable to connect with the slurry outlet surface 411 of the lip plate seat 41, thereby reducing the generation of free surfaces and improving the stability of slurry flow.

[0038] like Figure 4 and 5 In the illustrated embodiment, the adjustment mechanism 43 includes an adjustment dial 431, an adjustment handwheel 432, and an adjustment rod 433. The adjustment dial 431 and the adjustment handwheel 432 are connected to the upper part of the adjustment rod 433, and the small lip plate 42 is connected to the lower end of the adjustment rod 433. The adjustment handwheel 432 and the adjustment rod 433 are adapted to be engaged by a worm gear. The adjustment handwheel 432 is adapted to control the adjustment rod 433 to move along a first direction. The above design can realize fine adjustment of the movement of the adjustment rod 433. The adjustment dial 431 is adapted to magnify and display the adjustment stroke of the adjustment handwheel 432, so that the operator can easily observe and control the state of the adjustment rod 433.

[0039] In some embodiments, the adjustment gauge 431 is a dial indicator. By bringing the probe of the dial indicator into contact with the adjustment rod 433, the sliding of the adjustment rod 433 can drive the probe to move. The pointer on the dial can magnify the movement of the probe and display the distance moved, with the value accurately displayed to 0.01mm.

[0040] like Figure 6In the embodiment shown, a dilution water regulating device is provided on the upper lip plate assembly 4. The dilution water regulating device includes multiple outlets 44 and multiple sensing modules 45. The sensing modules 45 are arranged in conjunction with the regulating mechanism 43. The outlets 44 are arranged in conjunction with the regulating mechanism 43 on the side of the slurry outlet surface 411 close to the headbox body 2. The sensing modules 45 are adapted to sense the slurry concentration flowing through the small lip plate 42 and control the outlets 44 to inject water into the starting part of the slurry outlet chamber 7.

[0041] The dilution water adjustment device is used to inject water to dilute areas with excessively high slurry concentration, thereby balancing the concentration between different areas. Considering that the headbox structure of this application is relatively compact, it is necessary to design a simple device that does not occupy extra space to achieve the above purpose.

[0042] Since the lip plate seat 41 and the small lip plate 42 can be actively adjusted to change the flow rate and velocity of the slurry, the sensing modules 45 can be matched one by one and placed on the slurry outlet surface 411 of the lip plate seat 41 near the small lip plate 42 to achieve more accurate concentration monitoring.

[0043] It is worth noting that the top structure of the outlet 44 should be as flat as possible, and it should be kept as flush as possible with the slurry outlet surface 411 to reduce interference with the stability of the slurry flow.

[0044] like Figure 6 In the illustrated embodiment, the adjusting handwheel 432 and the adjusting rod 433 have a low degree of elasticity. This can be achieved by using an elastic bushing, a low-elasticity spring, or similar means at their joint. The low degree of elasticity means that the adjusting rod 433 can move a certain amount of elasticity relative to the adjusting handwheel 432 in the adjusting direction and can automatically reset. This elasticity is small and should not affect the stability of the adjusting rod 433, thus ensuring the stability of the slurry flow. In this case, the sensing module 45 is configured to sense the small elasticity caused by the pressure transmitted from the small lip plate 42 due to the change in concentration, which is fed back by the adjusting rod 433. This can be achieved by a pressure sensor or similar device. Then, information is sent to the system backend. After the system backend identifies and processes the information, a control signal is sent, and the outlet 44 is controlled to inject water into the beginning part of the slurry outlet 7, and there is sufficient time for dilution to occur in the middle and later parts of the slurry outlet 7.

[0045] It is worth noting that although the low elasticity between the adjusting handwheel 432 and the adjusting rod 433 may affect the normal display of the adjusting meter 431, in actual applications, a baseline adjusting data can be set first according to the characteristics of the slurry. After adjusting and positioning the data using the display of the adjusting meter 431, it is not necessary to refer to the display data of the adjusting meter 431 in subsequent operations. Therefore, the elasticity of the sensing module 45 will not affect the use of the adjusting meter 431.

[0046] In some embodiments, the sensing module 45 can use sensors for sensing minute displacements, such as laser displacement sensors and capacitive sensors, in the prior art. The system backend identifies, analyzes, and filters the acquired data to determine whether water should be injected and the amount of water injected.

[0047] It is understandable that the two types of sensor module 45 arrangements have different sensing principles, so they can be used individually or in combination to improve sensing accuracy and reduce errors and interference.

[0048] like Figure 6 In the illustrated embodiment, the lip plate seat 41 is provided with a receiving channel 412 with openings on the left and / or right sides. The dilution water regulating device includes a dilution pipe 46, which is adapted to pass through the receiving channel 412 and connect to the outlet 44. The side access method will not affect the operation of the headbox and the entire production line. The end of the dilution pipe 46 is fixed inside the lip plate seat 41 and is adapted to rise and fall with the lip plate seat 41. The dilution pipe 46 is connected to the upper lip plate assembly 4. The dilution water regulating device can be adjusted with the upper lip plate assembly 4, which can save space, improve the structural compactness, and allow the outlet 44 to change accordingly with the movement of the lip plate seat 41, thereby improving the quality of the output slurry.

[0049] like Figure 5 and 6 In the embodiment shown, the front end of the adjusting rod 433 and the slurry outlet side of the lip plate seat 41 are respectively provided with a limiting groove 413 and a limiting part 4331. The limiting groove 413 and the limiting part 4331 are adapted to abut against each other to limit the sliding of the small lip plate 42 in the direction of protruding from the slurry outlet surface 411. The limiting groove 413 and the limiting part 4331 are used to limit the maximum stroke of the small lip plate 42 to prevent the small lip plate 42 from protruding too much from the slurry outlet surface 411 and contacting other equipment on the production line, which would cause damage.

[0050] like Figure 5 and 6 In the embodiment shown, the lip plate seat 41 is provided with a blocking cover plate 414 on the slurry outlet side of the small lip plate 42. The blocking cover plate 414 is used to prevent the slurry from splashing up to the adjusting rod 433 when it flows out, thus affecting the feedback accuracy of the adjusting rod 433.

[0051] like Figures 1 to 4In the embodiment shown in Figure 7, the control mechanism 5 includes a control screw 51, a matching connecting sleeve 52, and a control rod 53. The connecting sleeve 52 is rotatably disposed on the top of the headbox body 2. One end of both the control screw 51 and the control rod 53 passes through the connecting sleeve 52 and is engaged within the connecting sleeve 52. The other end of the control rod 53 is rotatably connected to the upper lip plate assembly 4. The control screw 51 is adapted to rotate so that the control rod 53 slides along the insertion direction of the connecting sleeve 52 to drive the upper lip plate assembly 4 to rotate.

[0052] In some embodiments, the control screw 51, the connecting sleeve 52, and the control rod 53 cooperate to form a worm gear adjustment structure.

[0053] Understandably, the control screw 51 structure can not only precisely adjust the position of the control lever 53 to meet the precise adjustment requirements of the slurry outlet 71, but also effectively lock after adjustment, so that the upper lip plate assembly 4 can be stabilized at a fixed height without the need for additional structures and equipment.

[0054] like Figure 1 , 2 In the embodiments shown in Figure 7, there are multiple connecting sleeves 52 and control rods 53. The connecting sleeves 52 and control rods 53 are evenly arranged along the left and right sides of the headbox body 2. The rotation plane of the connecting sleeves 52 is a vertical plane. Multiple control rods 53 are used to improve the stability of the upper lip plate assembly 4 and reduce the vibration of the upper lip plate assembly 4 at various positions.

[0055] like Figures 1 to 4 In the embodiment shown in Figure 7, a control handwheel 54 is provided at one end of the control screw 51. The control screw 51 passes through all the connecting sleeves 52 and is connected to the control pull rods 53 inside the connecting sleeves 52. Therefore, the control handwheel 54 can drive the control screw 51 to rotate, so that all the control pull rods 53 can move synchronously, thereby stabilizing the distance between the upper lip plate assembly 4 and the lower lip plate 21.

[0056] like Figures 3 to 6 In the embodiment shown, a turbulence generator 8 is provided inside the headbox body 2. The structure of the turbulence generator 8 can use the common structure in the prior art. The two ends of the turbulence generator 8 are connected to the headbox body 2's outlet side and inlet side. The turbulence generator 8 is connected to the headbox outlet cavity 7 on the headbox body 2's outlet side. The headbox outlet positions of the turbulence generator 8 are spaced above the lower lip plate 21, and the headbox outlet direction of the turbulence generator 8 faces the headbox outlet surface 411.

[0057] It is worth noting that since the upper lip plate assembly 4 is a rotating and pressing structure, the length of the slurry outlet surface 411 is greater than the length of the lower lip plate 21 in the slurry outlet cavity 7. In order to overcome the problem of slurry flow rate caused by the difference in length between the upper and lower sides of the slurry outlet cavity 7 to a certain extent, the slurry outlet direction of the turbulence generator 8 is directed towards the slurry outlet surface 411 to accelerate the slurry flow rate at the slurry outlet surface 411 and achieve a better slurry outlet effect.

[0058] Meanwhile, since the outlet 44 is also arranged on the slurry outlet surface 411, the slurry outlet direction of the turbulence generator 8 is towards the slurry outlet surface 411, which can immediately replenish and mix the diluted slurry, ensuring the uniformity of the slurry flow.

[0059] like Figures 1 to 4 In the embodiment shown, the slurry feeding mechanism 3 includes a hanging plate 31, a hanging rod 32, and multiple slurry feeding pipes 33. The hanging plate 31 has an inlet 311 on its left and / or right sides. The slurry feeding pipes 33 extend from the inlet 311 to the top of the hanging plate 31 and are connected obliquely upward to the slurry feeding side of the headbox body 2. The two ends of the hanging rod 32 are respectively adapted to connect the side of the hanging plate 31 away from the headbox body 2 and the top of the headbox body 2. The slurry feeding pipes 33 are also designed as a lifting structure to adapt to changes in the headbox installation method and save installation space.

[0060] like Figures 1 to 4 In the embodiment shown, the hanging plate 31 is arranged at an angle, with the side of the hanging plate 31 away from the headbox body 2 being the lower side, and extending upward to form a support portion 312. The support portion 312 is suitable for restricting the slurry inlet pipe 33 from detaching from the hanging plate 31, preventing the slurry inlet pipe 33 from falling, while allowing the slurry inlet pipe 33 to enter the headbox body 2 with a larger arc, thereby improving the smoothness of slurry input.

[0061] like Figure 1 In the embodiment shown, a sliding port 22 is provided on the headbox body 2 along the direction of slurry inlet and outlet. The end of the hanging rod 32 is slidably connected to the sliding port 22, which can adjust the tilt of the hanging plate 31 and prevent the hanging plate 31 from tilting too much and falling too low, thus affecting the operation of the production line below.

[0062] like Figures 1 to 4 In the embodiment shown in Figure 7, the hoisting mechanism 1 includes a telescopic first boom 11 and a second boom 12. The upper ends of the first boom 11 and the second boom 12 are fixedly connected to the support beam 6. A boom beam is provided on the top of the headbox body 2 to improve the connection strength and stability between the headbox body 2 and the first boom 11 and the second boom 12. The lower ends of the first boom 11 and the second boom 12 are rotatably connected to both ends of the boom beam. It can be understood that the headbox body 2 can be tilted as a whole through the telescopic first boom 11 and the second boom 12, thereby facilitating the adjustment of the netting angle. It is also highly adaptable to the production line and does not require modification of other equipment.

[0063] Since the overall stability of the equipment is to be achieved by suspension installation, the balance of forces is an important factor. The control mechanism 5 is set at the top of the headbox body 2, which can help the equipment achieve counterweight balance and concentrate the center of gravity in the middle position of the headbox body 2. Furthermore, the control mechanism 5 can be set between the first boom 11 and the second boom 12 to reduce the weight offset on the outside of the first boom 11 and the second boom 12, thereby reducing the vibration that may occur in the headbox body 2 during operation to a certain extent.

[0064] like Figure 3 , 4 In the embodiments shown in Figure 7, both the first boom 11 and the second boom 12 include a first adjusting screw 13, a second adjusting screw 14, and an adjusting sleeve 15. The first end of the first adjusting screw 13 and the first end of the second adjusting screw 14 are respectively connected to the support beam 6 and the boom beam. The adjusting sleeve 15 is axially movable to connect the second end of the first adjusting screw 13 and the second end of the second adjusting screw 14. The adjusting sleeve 15 is adapted to bring the first adjusting screw 13 and the second adjusting screw 14 closer or further apart. The adjusting sleeve 15, in conjunction with the bolt, can be locked with high strength after the first adjusting screw 13 and the second adjusting screw 14 move relative to each other, thereby ensuring the stability of the headbox body 2 when the whole is tilted.

[0065] like Figures 1 to 4 In the embodiment shown, the first boom 11 and the second boom 12 are connected to a support beam 6 in an opposing embrace manner, which facilitates installation and enables better load-bearing and stability of the inclined headbox body 2 below.

[0066] The full-flow headbox of this application, with the above-described design, can achieve stable suspended installation, greatly improving the freedom of layout, while having multiple adjustable modes to achieve comprehensive control over the inflow speed, angle, and flow rate of the headbox, meeting various production needs. At the same time, the adjustment structures of each part are rationally laid out to adapt to suspended installation, making operation convenient, the adjustment process efficient, space-saving, and less prone to interference with external equipment, thus solving the shortcomings of traditional headboxes with complex structures and difficult layout.

[0067] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are only the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope of this application. All such changes and modifications fall within the scope of this application as claimed. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A full-flow headbox, characterized in that: The headbox includes a hoisting mechanism, a headbox body, a headbox inlet mechanism, an upper lip plate assembly, and a control mechanism. The hoisting mechanism is connected to the top of the headbox body. The headbox inlet mechanism and the upper lip plate assembly are respectively disposed on the headbox inlet side and the headbox outlet side of the headbox body. A lower lip plate is disposed on the headbox outlet side of the headbox body. The upper lip plate assembly is located above the lower lip plate. The bottom of the upper lip plate assembly has a flat headbox outlet surface. The upper lip plate assembly is rotatably connected to the upper part of the headbox outlet side of the headbox body on the first side of the headbox outlet surface. A headbox outlet cavity is adapted to be formed between the headbox outlet surface and the lower lip plate. The control mechanism is disposed on the top of the headbox body and connected to the upper lip plate assembly. The control mechanism is adapted to rotate the upper lip plate assembly to change the contraction amplitude of the headbox outlet cavity in the headbox outlet direction.

2. A full-flow headbox as described in claim 1, characterized in that: The upper lip plate assembly includes a lip plate seat, a small lip plate, and an adjustment mechanism. There are multiple small lip plates and adjustment mechanisms. The small lip plates and adjustment mechanisms are evenly arranged along the left and right sides of the lip plate seat, with one small lip plate and one adjustment mechanism cooperating with each other. The bottom of the lip plate seat is the pulp outlet surface. The lip plate seat is slidably disposed on the pulp outlet side of the lip plate seat. The adjustment mechanism is adapted to make the small lip plate slide along a first direction and protrude from the pulp outlet surface. The pulp outlet surface forms an angle α with the first direction, where 30°≤α≤75°.

3. A full-flow headbox as described in claim 2, characterized in that: The adjustment mechanism includes an adjustment dial, an adjustment handwheel, and an adjustment rod. The adjustment dial and the adjustment handwheel are connected to the upper part of the adjustment rod, and the small lip plate is connected to the lower end of the adjustment rod. The adjustment handwheel and the adjustment rod are adapted to be engaged with a worm gear. The adjustment handwheel is adapted to control the adjustment rod to move along a first direction, and the adjustment dial is adapted to magnify and display the adjustment stroke of the adjustment handwheel. When the small lip plate protrudes from the discharge surface, it is adapted to connect with the discharge surface of the lip plate seat.

4. A full-flow headbox as described in claim 3, characterized in that: The upper lip plate assembly is equipped with a dilution water regulating device, which includes multiple outlets and multiple sensing modules. Each sensing module is configured to cooperate with the regulating mechanism, and each outlet is configured to cooperate with the regulating mechanism on the side of the slurry outlet surface near the headbox body. The sensing modules are adapted to sense the slurry concentration flowing through the small lip plate and control the outlets to inject water into the initial part of the slurry outlet chamber. The regulating handwheel and the regulating rod have a low degree of elasticity. The sensing modules are adapted to sense the pressure transmitted from the small lip plate by the regulating rod. The device controls the outlet to inject water into the starting part of the slurry outlet chamber; the lip plate seat is provided with a receiving channel with openings on the left and / or right sides; the dilution water regulating device includes a dilution pipe, which is adapted to pass through the receiving channel and connect to the outlet, and the dilution pipe is adapted to rise and fall with the lip plate seat; the front end of the regulating rod and the slurry outlet side of the lip plate seat are respectively provided with a limiting groove and a limiting part, which are adapted to abut against each other to restrict the small lip plate from sliding in the direction protruding from the slurry outlet surface; the lip plate seat is provided with a blocking cover plate on the slurry outlet side of the small lip plate.

5. A full-flow headbox as described in claim 1, characterized in that: The control mechanism includes a control screw, a matching connecting sleeve, and a control rod. The connecting sleeve is rotatably mounted on the top of the headbox body. One end of both the control screw and the control rod passes through the connecting sleeve and engages within it. The other end of the control rod is rotatably connected to the upper lip plate assembly. The control screw is adapted to rotate so that the control rod slides along the insertion direction of the connecting sleeve, thereby driving the upper lip plate assembly to rotate.

6. A full-flow headbox as described in claim 5, characterized in that: There are multiple connecting sleeves and control rods, which are evenly arranged along the left and right sides of the headbox body. The rotation plane of the connecting sleeve is a vertical plane. A control handwheel is provided at one end of the control screw.

7. A full-flow headbox as described in claim 1, characterized in that: The headbox body is equipped with a turbulence generator. The two ends of the turbulence generator are connected to the headbox body's outlet side and inlet side. The turbulence generator is connected to the headbox outlet cavity on the headbox body's outlet side. The headbox outlet position of the turbulence generator is spaced above the lower lip plate, and the headbox outlet direction of the turbulence generator is towards the headbox outlet surface.

8. A full-flow headbox as described in claim 1, characterized in that: The slurry feeding mechanism includes a hanging plate, a hanging rod, and multiple slurry feeding pipes. The hanging plate has an inlet on its left and / or right sides. The slurry feeding pipes extend from the inlets to the top of the hanging plate and are connected obliquely upward to the slurry feeding side of the headbox body. The two ends of the hanging rod are respectively adapted to connect the side of the hanging plate away from the headbox body and the top of the headbox body. The hanging plate is arranged at an angle, with the side of the hanging plate away from the headbox body being the lower side, and extending upward to form a support portion. The support portion is adapted to restrict the slurry feeding pipes from detaching from the hanging plate. The headbox body has a sliding port along the slurry feeding direction, and the end of the hanging rod is slidably connected to the sliding port.

9. A full-flow headbox as described in claim 1, characterized in that: The hoisting mechanism includes a telescopic first boom and a second boom. The upper ends of the first boom and the second boom are fixedly connected to a support beam. A boom beam is provided on the top of the headbox body. The lower ends of the first boom and the second boom are rotatably connected to both ends of the boom beam.

10. A full-flow headbox as described in claim 9, characterized in that: Both the first boom and the second boom include a first adjusting screw, a second adjusting screw, and an adjusting sleeve. The first end of the first adjusting screw and the first end of the second adjusting screw are respectively connected to the support beam and the boom beam. The adjusting sleeve is axially movably connected to the second end of the first adjusting screw and the second adjusting screw. The adjusting sleeve is adapted to bring the first adjusting screw and the second adjusting screw closer together or further apart.

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