Headbox

Abstract

The utility model discloses a headbox. Comprising a box body and a stirring structure, the stirring structure is arranged on the box body and comprises a stirring end shaft, a stirring roller and a bearing seat, the bearing seat is installed on the outer wall of the box body, the stirring end shaft is movably arranged on the bearing seat, one end of the stirring end shaft extends into the box body and is connected with the stirring roller, and a first shaft shoulder and a key groove are arranged at the end, close to the stirring roller, of the stirring end shaft; a first containing groove matched with the first shaft shoulder is formed in the stirring roller, the stirring roller is installed on the key groove through a connecting key, and a first sealing ring is arranged between the first shaft shoulder and the key groove. The first shaft shoulder is arranged on the stirring end shaft, the first containing groove matched with the shaft shoulder is formed in the stirring roller, the stirring roller can be axially positioned through the shaft shoulder and is prevented from shaking left and right, the first sealing ring is arranged between the stirring roller and the stirring end shaft, and the connection reliability of the stirring roller and the stirring end shaft can be guaranteed; slurry is prevented from entering the key groove, and the stirring roller can be prevented from moving in the radial direction.

Description

Technical Field

[0001] This utility model relates to the field of headbox equipment technology, and in particular to a headbox. Background Technology

[0002] The headbox is the core component of the flow-type calcium silicate board machine, and its structure and performance play a decisive role in the formation and quality of the calcium silicate board. During the production process of flow-type calcium silicate boards, the stirring roller rotates at a uniform speed in the headbox to agitate the slurry, preventing sedimentation and segregation within the headbox and ensuring that the slurry is evenly spread on the towel.

[0003] The mixing structure is an important component in the headbox. In traditional headboxes, the connection between the mixing roller and the mixing end shaft inside the box is unreliable, which poses a risk of the mixing roller wobbling axially or radially, and also poses a risk of the slurry inside the box flowing between the mixing roller and the mixing end shaft. On the one hand, this affects the mixing effect, and on the other hand, it affects the service life of the roller. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a headbox, comprising a headbox body and a stirring structure. The stirring structure is mounted on the headbox body and includes a stirring end shaft, a stirring roller, and a bearing seat. The bearing seat is mounted on the outer wall of the headbox body, and the stirring roller is located inside the headbox body. The stirring end shaft is movably mounted on the bearing seat, with one end extending into the headbox body and connecting to the stirring roller. The end of the stirring end shaft near the stirring roller is provided with a first shoulder and a keyway. The keyway is located on the side of the first shoulder away from the bearing seat. The stirring roller is provided with a first receiving groove adapted to the first shoulder. The stirring roller is mounted on the keyway via a connecting key. A first sealing ring is provided between the first shoulder and the keyway, and the first sealing ring is squeezed and filled between the stirring end shaft and the stirring roller.

[0005] Furthermore, a sealing groove is provided on the stirring end shaft, and the first sealing ring is disposed in the sealing groove.

[0006] Furthermore, the stirring end shaft is also provided with a second shoulder, which is located between the first shoulder and the keyway. The stirring roller is provided with a second receiving groove that matches the second shoulder, and the inner diameter of the second receiving groove is smaller than the inner diameter of the first receiving groove.

[0007] Furthermore, the sealing groove is located between the first shoulder and the second shoulder.

[0008] Furthermore, the bottom of the box body is provided with at least one arc-shaped protrusion.

[0009] Furthermore, the bearing housing includes a base, a bearing, and a first end cover and a second end cover disposed at both ends of the base. The base is provided with a flange ring, which is installed on the housing. The bearing is disposed inside the base and sleeved on the stirring end shaft. The first end cover is sleeved on the stirring end shaft and a second sealing ring is provided between the two. The second end cover is sleeved on the stirring end shaft and a third sealing ring is provided between the two.

[0010] Furthermore, the stirring end shaft is also provided with a third shoulder, which is located on the side of the first shoulder near the bearing seat. The second end cover is sleeved between the first shoulder and the third shoulder, and the third sealing ring is squeezed and filled between the second end cover and the stirring end shaft.

[0011] Furthermore, there are two bearings, which are disposed between the first end cover and the third shoulder, and a retaining ring is provided between the two bearings.

[0012] Furthermore, a fourth sealing ring is provided between the first end cap and the second end cap and the base, respectively.

[0013] Furthermore, the second sealing ring is a lip seal, and / or the third sealing ring is a lip seal.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0015] 1) The headbox provided by this utility model has a first shoulder on the stirring end shaft of the stirring structure and a first receiving groove on the stirring roller that matches the first shoulder. The stirring roller can be axially positioned by the first shoulder to prevent the stirring roller from swaying left and right. A first sealing ring is provided between the stirring roller and the stirring end shaft. On the one hand, it can ensure the reliability of the connection between the stirring roller and the stirring end shaft and prevent the slurry from entering the keyway and affecting the use of the stirring roller. On the other hand, it can prevent the stirring roller from moving in the radial direction.

[0016] 2) The headbox provided by this utility model has a split structure for the bearing housing, which facilitates the assembly of the stirring end shaft, bearing, second sealing ring, third sealing ring and fourth sealing ring, and also facilitates the replacement of sealing rings. The second sealing ring and the third sealing ring ensure the dynamic seal between the stirring end shaft and the bearing housing, and the fourth sealing ring ensures the static seal between the end cover and the base. The sealing effect is good and it is not easy to leak slurry. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the headbox provided for the utility model;

[0019] Figure 2 A partial structural schematic diagram of the headbox provided for the utility model;

[0020] Figure 3 A schematic diagram of the stirring structure in the headbox provided for the utility model;

[0021] Figure 4 Schematic diagram of the structure of the stirring end shaft in the headbox provided for the utility model Figure 1 ;

[0022] Figure 5 Schematic diagram of the structure of the stirring end shaft in the headbox provided for the utility model Figure 2 ;

[0023] Figure 6 A schematic diagram of the structure of the base in the headbox provided for the utility model;

[0024] Figure 7 A schematic diagram of the structure of the second end cap in the headbox provided for the utility model;

[0025] Figure 8 A left view of the stirring structure in the headbox provided by the utility model.

[0026] 1-Box body; 11-Inlet; 12-Slag discharge port; 13-Arched protrusion; 14-Outlet; 15-First extrusion roller; 2-Stirring structure; 21-Stirring end shaft; 211-First shoulder; 212-Keyway; 213-Drive unit; 214-Sealing groove; 215-Second shoulder; 216-Third shoulder; 22-Stirring roller; 221-First receiving groove; 222-Second receiving groove; 223-Connecting key; 23-Bearing seat; 231-Base; 232-Bearing; 233-First end cover; 234-Second end cover; 235-Flange ring; 236-Second sealing ring; 237-Third sealing ring; 238-Steel retainer; 239-Oil nozzle; 24-First sealing ring; 3-Second extrusion roller. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. In the accompanying drawings, the dimensions and relative dimensions of certain parts may be enlarged for clarity.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "connected" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] In the description of this utility model, the terms "upper", "lower", "left", "right", "front", "back", "center", "horizontal", "vertical", "top", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, in the description of this utility model, the terms "first" and "second" are used merely for descriptive distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Additionally, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0031] As per the instruction manual Figure 1-3As shown, this utility model provides a headbox, including a box body 1 and a stirring structure 2. The stirring structure 2 is disposed on the box body 1. The stirring structure 2 includes a stirring end shaft 21, a stirring roller 22, and a bearing seat 23. The bearing seat 23 is installed on the outer wall of the box body 1. The stirring roller 22 is located inside the box body 1. The stirring end shaft 21 is movably disposed on the bearing seat 23 and one end extends into the box body 1 and is connected to the stirring roller 22. The end of the stirring end shaft 21 near the stirring roller 22 is provided with a first shoulder 211 and a keyway 212. The keyway 212 is disposed on the side of the first shoulder 211 away from the bearing seat 23. The stirring roller 22 is provided with a first receiving groove 221 adapted to the first shoulder 211. The stirring roller 22 is mounted on the keyway 212 through a connecting key 223. A first sealing ring 24 is provided between the first shoulder 211 and the keyway 212. The first sealing ring 24 is squeezed and filled between the stirring end shaft 21 and the stirring roller 22.

[0032] Preferably, the tank body 1 is provided with a feed inlet 11 and a slag discharge outlet 12, and the tank body 1 is provided with two stirring structures 2, which are arranged at intervals. The stirring structures 2 rotate to stir the slurry in the tank body 1. The tank body 1 is provided with at least one arc-shaped protrusion 13, which causes the slurry to form turbulence during the stirring process, thereby improving the mixing effect of the slurry.

[0033] The housing 1 is also provided with a discharge port 14, and a first extrusion roller 15 is provided above the discharge port 14. The first extrusion roller 15 is movably disposed inside the housing 1 via a rotating shaft. The first extrusion roller 15 cooperates with the second extrusion roller 3 below the housing 1, so that the slurry is evenly spread on the towel. The distance between the first extrusion roller 15 and the second extrusion roller 3 is adjustable.

[0034] Specifically, the stirring roller 22 is disposed inside the headbox body 1. Both ends of the stirring roller 22 are movably connected to corresponding bearing seats 23 via stirring end shafts 21. The bearing seats 23 are disposed on the headbox body 1. The stirring end shafts 21 are movably connected to the bearing seats 23, with one stirring end shaft 21 serving as the driving shaft and the other as the driven shaft. (See attached specification). Figure 4 The diagram shows a schematic of the drive shaft, which includes a drive unit 213. This drive unit 213 is used to connect to an external drive unit, which can be a motor. When the motor starts, the drive shaft rotates, thereby driving the stirring roller and the driven shaft to rotate. The stirring roller then completes the mixing of the slurry. (See attached instruction manual.) Figure 5 The diagram shows a driven shaft, which is movably connected to the bearing housing 23 on the corresponding side, and it does not have a drive unit. The length of the drive shaft is greater than the length of the driven shaft, and the connection structures of the drive shaft and the driven shaft to the bearing housing 23 and the stirring roller 22 are the same. Of course, in some embodiments, the structures of the drive shaft and the driven shaft may be different, and can be set according to requirements.

[0035] In an optimized implementation, the headbox body 1 is provided with a bearing seat mounting hole. The bearing seat 23 is adapted to the bearing seat mounting hole, and part of the bearing seat 23 extends into the headbox body 1. A sealing layer is provided between the bearing seat 23 and the bearing seat mounting hole for sealing. Part of the stirring end shaft 21 extends into the bearing seat 23 and is movably connected to the bearing seat 23, while the other part extends into the headbox body 1 and is connected to the stirring roller 22. The part of the stirring end shaft 21 extending into the headbox body 1 is the connecting end, which is provided with a first shoulder 211 and a keyway 212. The stirring roller 22 abuts against the first shoulder 211, thereby limiting the stirring roller 22 axially and preventing the stirring shaft 22 from moving left and right during use. The stirring end shaft 21 is provided with a sealing groove 214, and the first sealing ring 24 is disposed in the sealing groove 214.

[0036] Preferably, the sealing groove 214 is a circumferential sealing groove, and the first sealing ring 24 is disposed in the sealing groove 214. The first sealing ring 24 is squeezed and filled between the stirring end shaft 21 and the stirring roller 22, which can seal the gap between the stirring roller 22 and the stirring end shaft 21, and prevent the slurry from entering the keyway 212 at the end of the stirring end shaft 21, thereby improving the connection reliability between the stirring roller 22 and the stirring end shaft 21.

[0037] In an optimized implementation, the stirring end shaft 21 is further provided with a second shoulder 215, located between the first shoulder 211 and the keyway 212. The stirring roller 22 is provided with a second receiving groove 222 adapted to the second shoulder 215, the inner diameter of the second receiving groove 222 being smaller than the inner diameter of the first receiving groove 221. The two ends of the stirring roller 22, through the cooperation of the receiving grooves with the shoulders of the stirring end shaft, prevent the stirring shaft from moving axially, improving the reliability of the connection between the stirring end shaft and the stirring roller.

[0038] In an optimized implementation, the sealing groove 214 is located between the first shoulder 211 and the second shoulder 215.

[0039] Specifically, the stirring end shaft 21 has a multi-stage stepped structure, and the diameter of the stirring end shaft 21 gradually decreases from the first shoulder 211 to the keyway 212.

[0040] In an optimized implementation, the first sealing ring 24 is an O-ring. A static seal is formed between the stirring end shaft 21 and the stirring roller 22 through the first sealing ring 24, resulting in a good sealing effect and preventing slurry leakage.

[0041] Optimized implementation methods, as shown in the appendix to the instruction manual. Figure 6 and 7As shown, the bearing housing 23 includes a base 231, a bearing 232, and a first end cap 233 and a second end cap 234 disposed at both ends of the base 231. The base 231 is provided with a flange ring 235 for mounting on the headbox body 1. The flange ring 235 is detachably connected to the body 1 by bolts. The bearing 232 is disposed inside the base 232 and sleeved on the stirring end shaft 21. The first end cap 233 is sleeved on the stirring end shaft 21 and a second sealing ring 236 is provided between the two. The second end cap 234 is sleeved on the stirring end shaft 21 and a third sealing ring 237 is provided between the two.

[0042] Specifically, the bearing housing 23 has a split structure. The base 231 has a first end cover 233 and a second end cover 234 at both ends. The two end covers are detachably connected to the base 231 by bolts, facilitating the installation of the bearing 232, the second sealing ring 236, and the third sealing ring 237 within the base 231, and also facilitating the replacement of the corresponding sealing rings. When the stirring shaft 21 is the driving shaft, the driving part of the stirring shaft 21 extends beyond the first end cover 233; when the stirring shaft 21 is the driven shaft, the end of the stirring shaft 21 furthest from the keyway 212 is located inside the first end cover 233.

[0043] As per the instruction manual Figure 7 The diagram shows the structure of the second end cap 234. The second end cap 234 has a through hole, the diameter of which is adapted to the diameter of the stirring shaft 21. The stirring shaft 21 passes through the through hole. The second end cap 234 has an inner cavity for installing the third sealing ring 237. The second end cap 234 also has several mounting holes, which are connected by bolts and a base 231. When the stirring shaft 21 is the driving shaft, the first end cap 233 and the second end cap 234 have the same structure, and their dimensions are set according to requirements. When the stirring shaft 21 is the driven shaft, the first end cap 233 has no through hole.

[0044] In an optimized implementation, the stirring end shaft 21 is further provided with a third shoulder 216, which is located on the side of the first shoulder 211 near the bearing seat 23. The second end cap 234 is sleeved between the first shoulder 211 and the third shoulder 216. The stirring end shaft is provided with a protruding ring, which forms the first shoulder and the third shoulder with the stirring end shaft. The second end cap 234 is sleeved on the protruding ring, and the third sealing ring 237 is squeezed and filled between the second end cap 234 and the protruding ring of the stirring end shaft.

[0045] In an optimized implementation, the number of bearings 232 is two, and the two bearings 232 are disposed between the first end cover 233 and the third shoulder 216, with a retaining ring 238 provided between the two bearings 232. The two bearings 232 are positioned together by the retaining ring 238, and the bearing 232 closer to the third shoulder 216 abuts against the third shoulder 216.

[0046] Optimized implementation methods, as shown in the appendix to the instruction manual. Figure 8 As shown, the base 231 is provided with an oil nozzle 239 for easy lubrication. Lubricating oil is added under positive pressure inside the base to prevent it from flowing into the bearing housing from the rotary seal.

[0047] In an optimized implementation, the second sealing ring 236 is a lip seal, and / or the third sealing ring 237 is a lip seal, wherein the third sealing ring 237 is preferably a double-lip seal, used for rotational sealing between the stirring end shaft 21 and the second end cover 234.

[0048] In the optimized implementation, a fourth sealing ring is provided between the first end cap 233 and the second end cap 234 and the base 231, respectively. The end cap and the base are statically sealed through the fourth sealing ring, which has a good sealing effect and is not prone to leakage.

[0049] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0050] Those skilled in the art will understand that this invention can be implemented in many other specific forms without departing from the spirit and scope of this invention. Although embodiments of this invention have been described, it should be understood that this invention is not limited to these embodiments, and those skilled in the art can make changes and modifications within the spirit and scope of this invention as defined in the appended claims.

Claims

1. A headbox, comprising a box body and a stirring structure, wherein the stirring structure is disposed on the box body, characterized in that, The stirring structure includes a stirring end shaft, a stirring roller, and a bearing housing. The bearing housing is installed on the outer wall of the housing, and the stirring roller is located inside the housing. The stirring end shaft is movably mounted on the bearing housing, with one end extending into the housing and connected to the stirring roller. The end of the stirring end shaft near the stirring roller is provided with a first shoulder and a keyway. The keyway is located on the side of the first shoulder away from the bearing housing. The stirring roller is provided with a first receiving groove adapted to the first shoulder. The stirring roller is mounted on the keyway via a connecting key. A first sealing ring is provided between the first shoulder and the keyway, and the first sealing ring is squeezed and filled between the stirring end shaft and the stirring roller.

2. The headbox according to claim 1, characterized in that, The stirring end shaft is provided with a sealing groove, and the first sealing ring is disposed in the sealing groove.

3. The headbox according to claim 2, characterized in that, The stirring end shaft is also provided with a second shoulder, which is located between the first shoulder and the keyway. The stirring roller is provided with a second receiving groove that matches the second shoulder, and the inner diameter of the second receiving groove is smaller than the inner diameter of the first receiving groove.

4. The headbox according to claim 3, characterized in that, The sealing groove is located between the first shoulder and the second shoulder.

5. The headbox according to claim 1, characterized in that, The bottom of the box is provided with at least one arc-shaped protrusion.

6. The headbox according to claim 1, characterized in that, The bearing housing includes a base, a bearing, and a first end cap and a second end cap disposed at both ends of the base. A flange ring is provided on the base and is installed on the housing. The bearing is disposed inside the base and sleeved on the stirring end shaft. The first end cap is sleeved on the stirring end shaft and a second sealing ring is provided between the two. The second end cap is sleeved on the stirring end shaft and a third sealing ring is provided between the two.

7. The headbox according to claim 6, characterized in that, The stirring end shaft is also provided with a third shoulder, which is located on the side of the first shoulder near the bearing seat. The second end cover is sleeved between the first shoulder and the third shoulder, and the third sealing ring is squeezed and filled between the second end cover and the stirring end shaft.

8. The headbox according to claim 7, characterized in that, The number of bearings is two, and the two bearings are disposed between the first end cover and the third shoulder, with a retaining ring between the two bearings.

9. The headbox according to claim 6, characterized in that, A fourth sealing ring is provided between the first end cap and the second end cap and the base, respectively.

10. The headbox according to claim 6, characterized in that, The second sealing ring is a lip seal, and / or the third sealing ring is a lip seal.

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