Negative pressure adsorption roller

Abstract

The utility model discloses a negative pressure adsorption roller, comprising a roller body and a core shaft relatively rotatably nested in an inner cavity of the roller body, wherein the roller surface of the roller body is provided with at least one group of multiple adsorption holes communicated with its inner cavity, the outer roller surface of the core shaft is tightly attached to the inner wall of the inner cavity of the roller body, the outer roller surface of the core shaft is provided with at least one negative pressure cavity communicated with the adsorption hole, and as the roller body and the core shaft rotate, the negative pressure cavity can be periodically communicated with at least one adsorption hole of the roller body.

Description

Technical Field

[0001] The utility model relates to the technical field of roller structure, in particular to a negative pressure adsorption roller. Background Art

[0002] In the fields of household paper processing, a roller structure with a vacuum adsorption function is often needed to achieve the effect of pulling and transferring paper materials. Common adsorption rollers are mainly divided into two types. One is an integral single roller structure, which achieves a negative pressure effect in a local area of ​​the roller surface by drilling a number of air passages inside the roller body and under the action of an external suction fan; the other is a combined split structure. This type of split structure mainly adopts a rotating set of outer and inner rollers, and the two rollers are rotated and fixed between the two rollers through bearings, supports and other structures. However, this method will undoubtedly increase the gap between the roller surfaces, causing fibers to accumulate in the gap between the roller surfaces, resulting in abnormal problems such as rotational heating, air passage blockage and severe air leakage. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a negative pressure adsorption roller with a more stable and reliable structure and higher energy saving.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a negative pressure adsorption roller, including a roller body and a core shaft relatively rotatably nested in the inner cavity of the roller body, wherein the roller surface of the roller body is provided with at least one group of multiple adsorption holes communicated with its inner cavity, the outer roller surface of the core shaft is tightly attached to the inner wall of the inner cavity of the roller body, and the outer roller surface of the core shaft is provided with at least one negative pressure cavity communicated with the adsorption hole, and as the roller body and the core shaft rotate, the negative pressure cavity can be periodically communicated with at least one adsorption hole of the roller body.

[0005] Furthermore, at least one suction channel is provided in the core shaft, and any one of the negative pressure chambers is formed with at least one negative pressure hole communicating with the suction channel.

[0006] Furthermore, a suction shaft is provided in the suction channel, wherein the outer roller surface of the suction shaft is relatively rotatably pressed against or fixedly pressed against the outer edge of the negative pressure hole, the suction shaft is communicated with the suction channel or not, and the suction shaft is formed with at least one air guide hole that can communicate with the negative pressure hole.

[0007] Furthermore, the suction shaft is relatively rotatably arranged in the suction channel, and the relative rotation between the suction shaft and the core shaft allows the air guide holes to rotate to communicate with each other or rotate to avoid the negative pressure holes.

[0008] Furthermore, a receiving channel is provided in the core shaft, and any of the negative pressure chambers is provided with a connecting port connected to a suction air pipe preset in the receiving channel.

[0009] Furthermore, a blowing channel is provided in the core shaft, and at least one cleaning blowing hole is formed on the outer roller surface of the core shaft, which is connected to the blowing channel and the adsorption hole. As the roller body and the core shaft rotate, the cleaning blowing hole periodically blows toward the adsorption hole.

[0010] Furthermore, the outer roller surface of the core shaft is provided with a cleaning brush in contact with the inner wall of the inner cavity of the roller body.

[0011] The utility model adopts the above-mentioned scheme, and its beneficial effects are: by adopting the method of the outer roller surface of the core shaft tightly attached to the inner wall of the inner cavity of the roller body and the relatively rotating roller body and core shaft to achieve the negative pressure adsorption function, the structure is stable and reliable, and effectively avoids the problems of fiber accumulation, airway blockage and serious air leakage caused by excessive gap between the roller surfaces. Its unique suction channel and negative pressure chamber design make the adsorption process more flexible and efficient, and improve the adsorption effect. The additional blowing channel and cleaning blowing hole can remove the fibers in the adsorption hole and keep the airway unobstructed, effectively extending the service life of the roller body and saving more energy. Finally, the addition of a cleaning brush further enhances the cleaning effect and ensures the continuous and stable operation of the roller body. In short, the negative pressure adsorption roller of the utility model, with its stable and reliable structure, efficient adsorption function and convenient cleaning mechanism, brings significant advantages of more stability, reliability and energy saving to the fields of household paper processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the negative pressure adsorption roller.

[0013] Figure 2 It is a schematic diagram of the structure of the mandrel.

[0014] Figure 3 It is a cross-sectional schematic diagram of the negative pressure adsorption roller.

[0015] Figure 4-5 Schematic diagram of a negative pressure adsorption roller according to another embodiment.

[0016] Figure 6 Schematic diagram of a negative pressure adsorption roller according to another embodiment.

[0017] Among them, 1-roller body, 11-adsorption hole, 2-core shaft, 21-negative pressure chamber, 211-negative pressure hole, 212-suction air pipe, 22-suction channel, 3-blowing channel, 31-cleaning blowing hole, 4-cleaning brush, 5-suction shaft, 51-air guide hole. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention is described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0019] See attached Figure 1-3 As shown in the embodiment, a negative pressure adsorption roller is suitable for the production of household paper and other fields, so as to generate a negative pressure effect on the roller surface to transfer the base paper by negative pressure traction, specifically, it includes a roller body 1, a core shaft 2 relatively rotatably embedded in the inner cavity of the roller body 1, wherein, see the attached Figure 1 As shown, the roller surface of the roller body 1 is provided with at least one group of multiple adsorption holes 11 arranged in a ring shape and communicating with its inner cavity. The adsorption holes 11 of this embodiment are arranged axially and radially along the roller body 1, and each group includes a number of adsorption holes 11 arranged in a ring shape.

[0020] In this embodiment, the roller body 1 and the core shaft 2 are both cylindrical structures (the outer roller surface of the roller body (1) can be (1) smooth, concave and convex, or grooved (hole) surface, which is not specifically limited here and can be selected as needed), wherein the outer diameter length of the core shaft 2 is almost equal to the inner diameter length of the roller body 1 (in fact, in order to facilitate the relative rotation and assembly of the two, the outer diameter length of the core shaft 2 is actually slightly smaller than the inner diameter length of the roller body 1), so that the outer roller surface of the core shaft 2 is closely attached to the inner wall of the inner cavity of the roller body 1. Secondly, see the attached Figure 2 As shown, the outer roller surface of the core shaft 2 has at least one negative pressure cavity 21 that communicates with the adsorption hole 11 (the shape of the negative pressure cavity 21 can be a groove or a hole, which is not specifically limited here, and an appropriate shape can be selected as needed), that is, each negative pressure cavity 21 of this embodiment is arranged along the axial direction of the core shaft 2, and the notch of each negative pressure cavity 21 extends in an arc shape along the circumferential direction of the roller surface of the core shaft 2 to form an arc notch with a certain circumferential span. At this time, each negative pressure cavity 21 can communicate with a single adsorption hole 11 or communicate with multiple adjacent adsorption holes 11 at the same time, so that a negative pressure area is formed on the roller surface of the roller body 1 over a certain circumferential span. Therefore, as the roller body 1 and the core shaft 2 rotate, the negative pressure cavity 21 can be periodically communicated with the adsorption hole 11 of the roller body 1. Specifically, as the roller body 1 rotates relative to the core shaft 2, each adsorption hole 11 of the roller body 1 can be connected to form a negative pressure for adsorbing materials only when it rotates to the overlapping position corresponding to the negative pressure cavity 21 (which can be partially overlapped or completely overlapped).

[0021] In this embodiment, a suction channel 22 is provided in the core shaft 2, and the suction channel 22 can be extended to the end of the core shaft 2 to communicate with an external suction fan (not shown in the figure), thereby achieving a negative pressure effect of the suction channel 22. Any negative pressure cavity 21 is formed with a negative pressure hole 211 directly communicating with the suction channel 22, thereby forming a negative pressure suction path of "adsorption hole 11-negative pressure cavity 21-negative pressure hole 211-suction channel 22".

[0022] Furthermore, the aperture size of the negative pressure hole 211 can be set according to the actual negative pressure requirement of the material, that is: the aperture of the negative pressure hole 211 directly affects the flow and negative pressure of the negative pressure chamber 21, so that the larger the aperture of the negative pressure hole 211, the stronger the negative pressure effect at the adsorption hole 11; conversely, the smaller the aperture of the negative pressure hole 211, the weaker the negative pressure effect at the adsorption hole 11.

[0023] Since the core shaft 2 and the inner wall of the roller body 1 are in close contact with each other, fibers are likely to accumulate in the gap between the core shaft 2 and the roller body 1 during long-term operation, affecting the relative rotation of the two or blocking the adsorption holes 11. Figure 3 As shown, in this embodiment, a blowing channel 3 is provided inside the mandrel 2, and the blowing channel 3 can be extended to the end of the mandrel 2 and connected to an external high-pressure blower (not shown in the figure), thereby achieving a high-pressure blowing effect. The roller surface of the mandrel 2 has at least one clean blowing hole 31 that is connected to the blowing channel 3 and to the adsorption hole 11 of the roller body 1. As the roller body 1 and the mandrel 2 rotate, the clean blowing hole 31 periodically blows toward the adsorption hole 11, that is, as the roller body 1 rotates relative to the mandrel 2, each adsorption hole 11 can form a positive pressure for blowing outward only when it rotates to a position that is connected to the clean blowing hole 31, thereby blowing out the debris accumulated in the adsorption hole 11 and between the roller body 1 and the mandrel 2 to avoid excessive accumulation.

[0024] Furthermore, the cleaning air blowing hole 31 and the negative pressure chamber 21 of this embodiment are located at radially opposite sides of the core shaft 2 , thereby preventing the positive pressure airflow blown out by the cleaning air blowing hole 31 from interfering with the negative pressure suction effect at the negative pressure chamber 21 .

[0025] In this embodiment, since some debris has a certain degree of stickiness or is easy to hide in the gap between the roller body 1 and the core shaft 2, it cannot be eradicated by blowing alone. Therefore, the outer roller surface of the core shaft 2 is provided with a cleaning brush 4 (the cleaning brush 4 of this embodiment can be made of materials such as wool cloth and roller brush) that contacts the inner wall of the inner cavity of the roller body 1. As the roller body 1 and the core shaft 2 rotate, the cleaning brush 4 continuously rotates and scrapes the inner wall of the inner cavity of the roller body 1, and uses the blowing channel 3 and the cleaning blowing hole 31 to blow out the scraped debris in time.

[0026] In this embodiment, the cleaning brush 4 can be fixed to the outer roller surface of the core shaft 2 by screws, gluing, clamping, etc., so as to prevent the cleaning brush 4 from shifting during the relative rotation of the roller body 1 and the core shaft 2.

[0027] In another embodiment, see the attached Figure 4 and 5 The suction channel 22 shown is provided with a rotating or non-rotating suction shaft 5 (the suction shaft 5 can extend to the end of the core shaft 2 and be connected to the external suction fan, and the suction channel 22 here can be connected to the external suction fan or not), wherein the outer roller surface of the suction shaft 5 is relatively close to the outer edge of the negative pressure hole 211, wherein, see the attached Figure 4 As shown, when the suction shaft 5 is arranged in the suction channel 22 without rotation, the outer roller surface of the suction shaft 5 is fixedly attached to the outer edge of the negative pressure hole 211; see the attached Figure 4 and 5 As shown, when the suction shaft 5 is rotatably arranged in the suction channel 22, the outer roller surface of the suction shaft 5 rotates and is closely attached to the outer edge of the negative pressure hole 211; the suction shaft 5 can be arranged to rotate or not rotate as needed. Secondly, the suction shaft 5 is formed with at least one air guide hole 51 that can communicate with the negative pressure hole 211. For the suction shaft 5 that is arranged to not rotate, the air guide hole 51 is always in communication with the negative pressure hole 211; for the suction shaft 5 that is arranged to rotate, the air guide hole 51 can be rotatably connected with the negative pressure hole 211 or rotate away from it. Specifically, the following further explains and illustrates the suction shaft 5 which is arranged in a rotational manner as an example. In this embodiment, the suction shaft 5 is formed with at least one air guide hole 51 which is arranged along its axial direction and corresponds to each negative pressure hole 211 one by one. As the suction shaft 5 rotates relative to the core shaft 2, the air guide holes 51 can be rotated to connect with or rotated to avoid the negative pressure holes 211. When the air guide holes 51 are rotated to connect with the negative pressure holes 211, a negative pressure suction path of “suction shaft 5-air guide holes 51-negative pressure holes 211-negative pressure chamber 21-adsorption holes 11” is formed. On the contrary, when the air guide holes 51 are rotated to avoid the negative pressure holes 211, the connection between the air guide holes 51 and the negative pressure holes 211 is blocked and cut off, and the adsorption is closed at this time.

[0028] In another embodiment, see the attached Figure 6 As shown, a containing channel is provided in the core shaft 2 (for the convenience of processing, the suction channel 22 here also serves as the containing channel), and any negative pressure chamber 21 leads out with a connection port connected to a suction air pipe (212) preset in the containing channel, so that the negative pressure of any negative pressure chamber 21 can be independently controlled through the suction air pipe (212), that is, when a larger negative pressure effect is required locally on the roller surface of the roller body 1, the suction air pipe (212) can be connected to the negative pressure suction fan to be independently connected to the negative pressure chamber 21 of the corresponding area, thus forming a negative pressure suction path of "suction air pipe (212)-negative pressure chamber 21-adsorption hole 11".

[0029] The embodiments described above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any technician familiar with the field, without departing from the scope of the technical solution of the present invention, can make more possible changes and modifications to the technical solution of the present invention using the technical content disclosed above, or the modifications are equivalent embodiments of the present invention. Therefore, any equivalent and equivalent changes made according to the idea of ​​the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A negative pressure adsorption roller, characterized in that: The invention comprises a roller body (1) and a core shaft (2) which is relatively rotatable and nested in an inner cavity of the roller body (1), wherein the roller surface of the roller body (1) is provided with at least one group of a plurality of adsorption holes (11) which are in communication with the inner cavity thereof, the outer roller surface of the core shaft (2) is tightly attached to the inner wall of the inner cavity of the roller body (1), and the outer roller surface of the core shaft (2) is provided with at least one negative pressure cavity (21) which is in communication with the adsorption hole (11), and as the roller body (1) and the core shaft (2) rotate, the negative pressure cavity (21) can be periodically communicated with at least one adsorption hole (11) of the roller body (1).

2. The negative pressure adsorption roller according to claim 1, characterized in that: At least one suction channel (22) is provided in the core shaft (2), and any one of the negative pressure chambers (21) is formed with at least one negative pressure hole (211) that communicates with the suction channel (22).

3. A negative pressure adsorption roller according to claim 2, characterized in that: A suction shaft (5) is provided in the suction channel (22), wherein an outer roller surface of the suction shaft (5) is relatively tightly attached to an outer edge of the negative pressure hole (211), the suction shaft (5) is in communication with the suction channel (22) or not, and the suction shaft (5) is formed with at least one air guide hole (51) that can communicate with the negative pressure hole (211).

4. The negative pressure adsorption roller according to claim 3, characterized in that: The suction shaft (5) is relatively rotatably arranged in the suction channel (22), and as the suction shaft (5) and the core shaft (2) rotate relative to each other, the air guide holes (51) rotate to communicate with each other or rotate to avoid the negative pressure hole (211).

5. The negative pressure adsorption roller according to claim 1, characterized in that: The core shaft (2) is provided with a receiving channel, and any one of the negative pressure chambers (21) leads out with a connection port that is connected to a suction air pipe (212) preset in the receiving channel.

6. The negative pressure adsorption roller according to claim 1, characterized in that: The core shaft (2) is provided with a blowing channel (3), and the outer roller surface of the core shaft (2) is formed with at least one cleaning blowing hole (31) which is in communication with the blowing channel (3) and the adsorption hole (11), so that as the roller body (1) and the core shaft (2) rotate, the cleaning blowing hole (31) periodically blows air toward the adsorption hole (11).

7. The negative pressure adsorption roller according to claim 5, characterized in that: The outer roller surface of the core shaft (2) is provided with a cleaning brush (4) which contacts the inner wall of the inner cavity of the roller body (1).

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