Negative pressure seal for a paper stabilizer

Abstract

The application provides a negative pressure sealing device of a paper stabilizer, which comprises a paper stabilizer body and a sealing assembly. The paper stabilizer body comprises a bellows, an air suction pipe and an air supply pipe. The sealing assembly comprises a fixing seat, a linear driver, a driving piece, a fixing frame, two driven pieces, two sealing curtains, two elastic clamping pieces and a sealing strip. The elastic clamping piece comprises a clamping arm, a clamping block and a plurality of elastic structures, the clamping arm is installed on the driven piece, the clamping block is connected to the clamping arm, and the plurality of elastic structures are installed on the clamping arm. The negative pressure sealing device of the paper stabilizer can adjust the positions of the sealing strip and the elastic clamping piece in the first direction under the action of the linear driver, so that the elastic force of the elastic structures acting on the sealing strip is kept constant, and the resisting effect of the elastic structures is effectively ensured.

Description

Technical Field

[0001] This application relates to the field of paper stabilizer technology, and in particular to a negative pressure sealing device for a paper stabilizer. Background Technology

[0002] When using conveyors to transport flexible materials such as thin sheets and plates, high-speed paper stabilizers are typically used to absorb the material and improve conveying stability. Generally, the paper stabilizer creates a vacuum area through the Coanda effect or perforated suction, and then a sealing strip maintains a certain degree of vacuum. Currently, the sealing strip is made of polytetrafluoroethylene (PTFE), which is expensive and wears out quickly. Once worn, the sealing strip cannot provide a stable vacuum area, thus failing to effectively absorb the material. In related technologies, to ensure a tight fit between the sealing strip and the material surface, the sealing strip is snapped into a slot in a clip, and an elastic structure holds the sealing strip against the material surface to ensure a seal. However, as the sealing strip wears down, the elastic structure gradually elongates, and the elastic force acting on the sealing strip gradually decreases. Ultimately, this leads to the sealing strip failing to adhere tightly to the material surface, again failing to form a stable vacuum area. Summary of the Invention

[0003] The purpose of this application is to provide a negative pressure sealing device for a paper stabilizer, so as to solve the technical problem in the prior art where the reduced elastic force causes the sealing strip to fail to adhere tightly to the material surface.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a negative pressure sealing device for a paper stabilizer, comprising: The paper stabilizer body includes a bellows, an exhaust pipe, and an air supply pipe. The exhaust pipe and the air supply pipe are both installed in the bellows and are connected to the bellows. A sealing assembly includes a fixed base, a linear actuator, an active member, a fixed frame, two driven members, two sealing curtains, two elastic clamping members, and a sealing strip. The fixed base is mounted on the air box, the linear actuator is mounted on the fixed base, the active member is mounted on the linear actuator and moves along a first direction under the drive of the linear actuator, the fixed frame is mounted on the active member, the two driven members are both mounted on the fixed frame and move towards each other or away from each other along a second direction under the drive of the active member, the sealing curtains are installed between the two driven members and the fixed base, and the two elastic clamping members are respectively mounted on the two driven members and used to clamp the sealing strip. The elastic clamping member includes a clamping arm, a clamping block, and multiple elastic structures. The clamping arm is mounted on the driven member, the clamping block is engaged with the clamping arm and can slide relative to the clamping arm, and the multiple elastic structures are all mounted on the clamping arm and can drive the clamping block to move away from the fixed base along a first direction.

[0005] Optionally, the active component includes a connecting frame, a rotary driver, a connecting plate, at least one connecting rod, a screw, and a moving block. The connecting frame is mounted on the linear driver and moves along a first direction under the drive of the linear driver. The connecting plate is disposed between the fixed frame and the connecting frame. At least one connecting rod is mounted between the connecting frame and the connecting plate. The screw is mounted on the rotary driver and between the connecting frame and the connecting plate, and rotates around the first direction under the drive of the rotary driver. The moving block is sleeved on at least one connecting rod and the screw, and screwed to the screw.

[0006] Optionally, the fixing frame includes two mounting plates and a plurality of first guide rods, with both mounting plates mounted on the active member and the plurality of first guide rods mounted between the two mounting plates.

[0007] Optionally, the driven member includes a driven block and two hinged rods. The driven block is sleeved on a plurality of first guide rods, and the two hinged rods are hinged between the moving block and the driven block, and are respectively disposed at both ends of the driven block.

[0008] Optionally, the hinge rod is hinged to one end of the movable block near the fixed base.

[0009] Optionally, the active component further includes a plurality of second guide rods, all of which are mounted on the connecting frame and pass through the fixed base.

[0010] Optionally, the clamping arm includes an arm body, two limiting seats and multiple limiting rods. The two limiting seats are respectively connected to both ends of the arm body, and the multiple limiting rods are installed between the two limiting seats and pass through the multiple elastic structures respectively.

[0011] Optionally, the clamping arm further includes a sealing gasket, which is installed on the clamping block and abuts against the clamping block and the arm body.

[0012] Optionally, the sealing strip includes a strip body, two first protrusions and two second protrusions, the two first protrusions being formed on both sides of the strip body along a second direction, and the two second protrusions being formed on both sides of the strip body along a second direction, with the first protrusions and the second protrusions arranged at intervals along a first direction.

[0013] Optionally, multiple sealing components are provided, and all of the multiple sealing components are installed on the air box.

[0014] The beneficial effects of the negative pressure sealing device for a paper stabilizer provided in this application are as follows: This application provides a negative pressure sealing device for a paper stabilizer. When the sealing strip is in contact with the material surface, a vacuum area can be formed between the housing and the sealing strip through the exhaust pipe and the supply pipe. Under the action of the driving member and two driven members, two elastic clamping members can move towards each other or away from each other in a second direction, thereby clamping sealing strips of different thicknesses. Under the action of the two elastic structures, the sealing strip can always be tightly attached to the material surface, effectively ensuring the vacuum degree of the vacuum area. Under the action of the linear actuator, the position of the sealing strip and the elastic clamping members can be adjusted in the first direction, so that the elastic force of the elastic structure acting on the sealing strip remains approximately constant, effectively ensuring the holding effect of the elastic structure, and also ensuring the vacuum degree of the vacuum area, avoiding the separation of the sealing strip and the material due to insufficient elastic force. Under the action of the sealing curtain, a seal can be formed between the clamping arm and the fixed seat without interfering with the movement of the elastic clamping members. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A plan view of a negative pressure sealing device for a paper stabilizer provided in this application; Figure 2 A partial cross-sectional view of a negative pressure sealing device for a paper stabilizer provided in this application; Figure 3 A cross-sectional view of the sealing assembly of a negative pressure sealing device for a paper stabilizer provided in this application; Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0017] The following are the labeling elements in the figure: 1. Paper stabilizer body; 11. Bellows; 12. Exhaust duct; 13. Supply duct; 2. Sealing assembly; 21. Fixed base; 22. Linear actuator; 23. Driving element; 231. Connecting frame; 232. Rotary actuator; 233. Connecting plate; 234. Connecting rod; 235. Screw; 236. Moving block; 237. Second guide rod; 24. Fixed frame; 241. Mounting plate; 242. First guide rod; 25. Driven element; 251. Driven block; 252. Hinge rod; 26. Sealing curtain; 27. Elastic clamping element; 271. Clamping arm; 2711. Arm body; 2712. Limiting seat; 2713. Limiting rod; 272. Clamping block; 273. Elastic structure; 28. Sealing strip; 281. Strip body; 282. First convex strip; 283. Second convex strip. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0019] It should be noted that when a component is referred to as being "mounted to," "fixed to," or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0020] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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 application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] like Figures 1 to 4As shown, this application provides a negative pressure sealing device for a paper stabilizer, including a paper stabilizer body 1 and a sealing assembly 2. The paper stabilizer body 1 includes a bellows 11, an exhaust pipe 12 and an air supply pipe 13. The exhaust pipe 12 and the air supply pipe 13 are both installed in the bellows 11 and communicate with the bellows 11. The sealing assembly 2 includes a fixed base 21, a linear actuator 22, an active member 23, a fixed frame 24, two driven members 25, two sealing curtains 26, two elastic clamping members 27, and a sealing strip 28. The fixed base 21 is mounted on the air box 11, the linear actuator 22 is mounted on the fixed base 21, the active member 23 is mounted on the linear actuator 22 and moves along a first direction under the drive of the linear actuator 22, the fixed frame 24 is mounted on the active member 23, and the two driven members 25 are both mounted on the fixed frame 24 and move towards each other or away from each other along a second direction under the drive of the active member 23. A sealing curtain 26 is installed between each of the two driven members 25 and the fixed base 21, and the two elastic clamping members 27 are respectively installed on the two driven members 25 and are used to clamp the sealing strip 28. The elastic clamping member 27 includes a clamping arm 271, a clamping block 272, and multiple elastic structures 273. The clamping arm 271 is mounted on the driven member 25. The clamping block 272 is engaged with the clamping arm 271 and can slide relative to the clamping arm 271. Multiple elastic structures 273 are mounted on the clamping arm 271 and can drive the clamping block 272 to move away from the fixed base 21 along the first direction.

[0023] It should be noted that the "above" and "below" directions refer to the bidirectional direction of the shortest connecting line between the linear actuator 22 and the sealing strip 28, specifically as follows: Figure 3 The X-axis is shown in the diagram. The second direction, above and below, refers to the bidirectional direction of the shortest line connecting the two elastic clamping members 27, as specifically shown in the diagram. Figure 3 The Y-axis is shown in the figure.

[0024] This application provides a negative pressure sealing device for a paper stabilizer. When the sealing strip 28 is in contact with the material surface, a vacuum area can be formed between the housing and the sealing strip 28 through the exhaust pipe 12 and the supply pipe 13. Under the action of the driving member 23 and the two driven members 25, the two elastic clamping members 27 can move towards each other or away from each other in the second direction, thereby clamping sealing strips 28 of different thicknesses. Under the action of the two elastic structures 273, the sealing strip 28 can always be tightly attached to the material surface, effectively ensuring the vacuum degree of the vacuum area. Under the action of the linear actuator 22, the position of the sealing strip 28 and the elastic clamping members 27 in the first direction can be adjusted, so that the elastic force of the elastic structure 273 acting on the sealing strip 28 remains approximately constant, effectively ensuring the holding effect of the elastic structure 273, and also ensuring the vacuum degree of the vacuum area, avoiding the situation where the sealing strip 28 separates from the material due to insufficient elastic force. Under the action of the sealing curtain 26, a seal can be formed between the clamping arm 271 and the fixed seat 21 without interfering with the movement of the elastic clamping member 27.

[0025] Optionally, the elastic structure 273 is configured as a spring or a sheet.

[0026] In one embodiment of this application, please refer to Figures 1 to 4 The active component 23 includes a connecting frame 231, a rotary driver 232, a connecting plate 233, at least one connecting rod 234, a screw 235, and a moving block 236. The connecting frame 231 is mounted on the linear driver 22 and moves along a first direction under the drive of the linear driver 22. The connecting plate 233 is disposed between the fixed frame 24 and the connecting frame 231. At least one connecting rod 234 is mounted between the connecting frame 231 and the connecting plate 233. The screw 235 is mounted on the rotary driver 232 and between the connecting frame 231 and the connecting plate 233, and rotates around the first direction under the drive of the rotary driver 232. The moving block 236 is sleeved on at least one connecting rod 234 and the screw 235 and screwed to the screw 235.

[0027] This configuration, under the action of the connecting frame 231 and the connecting plate 233, limits the screw 235, ensuring that it can only rotate around the first direction. Under the action of the connecting rod 234, the moving block 236 is limited, ensuring it can only move around the first direction, preventing it from rotating with the screw 235 and improving its stability in the first direction. Under the action of the screw 235, the rotary driver 232 can move the moving block 236 and lock it, thus improving the structural stability between the two elastic clamping members 27 and preventing them from loosening during clamping.

[0028] In one embodiment of this application, please refer to the following: Figures 1 to 4 The fixed frame 24 includes two mounting plates 241 and multiple first guide rods 242. Both mounting plates 241 are mounted on the driving member 23, and the multiple first guide rods 242 are mounted between the two mounting plates 241. The driven member 25 includes a driven block 251 and two hinge rods 252. The driven block 251 is sleeved on the multiple first guide rods 242, and the two hinge rods 252 are hinged between the moving block 236 and the driven block 251, and are respectively located at both ends of the driven block 251.

[0029] This configuration, with the action of multiple first guide rods 242, can guide the driven block 251, helping to improve the movement stability of the driven block 251 in the second direction. With the action of two hinge rods 252, the movement of the moving block 236 in the first direction can be converted into movement of the driven block 251 in the second direction.

[0030] In one embodiment of this application, see [reference] Figures 1 to 4 The hinge rod 252 is hinged to one end of the movable block 236 near the fixed base 21.

[0031] This configuration allows the two driven blocks 251 to move towards each other or away from each other along the second direction, and the two clamping blocks 272 to move towards each other or away from each other along the second direction. It can be used to clamp sealing strips 28 of different thicknesses, has a wide range of applications, and can quickly replace sealing strips 28, making it convenient to use.

[0032] In one embodiment of this application, please refer to Figures 1 to 4 The active component 23 also includes a plurality of second guide rods 237, which are all mounted on the connecting frame 231 and pass through the fixed seat 21.

[0033] With this configuration, the movement of the connecting frame 231 can be guided by the action of multiple second guide rods 237, which helps to improve the movement stability of the active member 23, the driven member 25, the elastic clamping member 27 and the sealing strip 28 in the first direction.

[0034] In one embodiment of this application, please refer to the following: Figures 1 to 4 The clamping arm 271 includes an arm body 2711, two limiting seats 2712 and multiple limiting rods 2713. The two limiting seats 2712 are respectively connected to the two ends of the arm body 2711, and the multiple limiting rods 2713 are installed between the two limiting seats 2712 and pass through multiple elastic structures 273 and clamping blocks 272 respectively.

[0035] With this configuration, the two limiting seats 2712 can be used to install the limiting rod 2713. Under the action of the limiting rod 2713, not only can the movement of the clamping block 272 be guided, but the elastic structure 273 can also be limited, so that the elastic structure 273 can be stably held between the clamping block 272 and the limiting seat 2712, thereby allowing the elastic force of the elastic structure 273 to act stably on the clamping block 272.

[0036] In one embodiment of this application, see [reference] Figures 1 to 4 The clamping arm 271 also includes a sealing gasket, which is installed on the clamping block 272 and abuts against the clamping block 272 and the arm body 2711.

[0037] With this configuration, a seal can be formed between the clamping block 272 and the arm body 2711 under the action of the sealing gasket, which can prevent the vacuum level in the vacuum area from being affected.

[0038] In one embodiment of this application, please refer to Figures 1 to 4The sealing strip 28 includes a strip body 281, two first protrusions 282 and two second protrusions 283. The two first protrusions 282 are respectively formed on both sides of the strip body 281 along the second direction, and the two second protrusions 283 are respectively formed on both sides of the strip body 281 along the second direction. The first protrusions 282 and the second protrusions 283 are arranged at intervals along the first direction.

[0039] With this configuration, when the two clamping blocks 272 clamp the sealing strip 28, the first protrusion 282 and the second protrusion 283 can limit the strip body 281, preventing the strip body 281 from moving relative to the clamping blocks 272 in the first direction, so that the strip body 281 can be stably clamped between the two clamping blocks 272, resulting in a good sealing effect.

[0040] In one embodiment of this application, please refer to the following: Figures 1 to 4 Multiple sealing components 2 are provided, and all multiple sealing components 2 are installed in the air box 11.

[0041] This configuration, through multiple sealing components 2, can further improve the sealing effect.

[0042] The working principle of the negative pressure sealing device for a paper stabilizer provided in this application is as follows: During use, when slight wear occurs at the end of the sealing strip 28 away from the clamping block 272, the elastic force of the elastic structure 273 acts on the clamping block 272, causing the clamping block 272 to move towards the material along the first direction. Under the action of the two clamping blocks 272, the sealing strip 28 also moves towards the material along the first direction. After the clamping block 272 moves towards the material, the elastic structure 273 extends, and the elastic force of the elastic structure 273 acting on the sealing strip 28 decreases until the sealing strip 28 experiences severe wear. When the sealing strip 28 experiences severe wear, the linear actuator 22 drives the connecting frame 231 to move towards the material along the first direction. Driven by the connecting frame 231, the driving member 23, the two driven members 25, and the two elastic clamping members 27 all move towards the material along the first direction. Under the resistance of the material, the strip 281 can drive the clamping block 272 to move towards the connecting frame 231 along the first direction, the elastic structure 273 is compressed, and the elastic force of the elastic structure 273 acting on the sealing strip 28 increases, and so on.

[0043] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A negative pressure sealing device for a paper stabilizer, characterized in that, include: The paper stabilizer body includes a bellows, an exhaust pipe, and an air supply pipe. The exhaust pipe and the air supply pipe are both installed in the bellows and are connected to the bellows. A sealing assembly includes a fixed base, a linear actuator, an active member, a fixed frame, two driven members, two sealing curtains, two elastic clamping members, and a sealing strip. The fixed base is mounted on the air box, the linear actuator is mounted on the fixed base, the active member is mounted on the linear actuator and moves along a first direction under the drive of the linear actuator, the fixed frame is mounted on the active member, the two driven members are both mounted on the fixed frame and move towards each other or away from each other along a second direction under the drive of the active member, the sealing curtains are installed between the two driven members and the fixed base, and the two elastic clamping members are respectively mounted on the two driven members and used to clamp the sealing strip. The elastic clamping member includes a clamping arm, a clamping block, and multiple elastic structures. The clamping arm is mounted on the driven member, the clamping block is engaged with the clamping arm and can slide relative to the clamping arm, and the multiple elastic structures are all mounted on the clamping arm and can drive the clamping block to move away from the fixed base along a first direction.

2. The negative pressure sealing device for a paper stabilizer as described in claim 1, characterized in that, The active component includes a connecting frame, a rotary driver, a connecting plate, at least one connecting rod, a screw, and a moving block. The connecting frame is mounted on the linear driver and moves along a first direction under the drive of the linear driver. The connecting plate is disposed between the fixed frame and the connecting frame. At least one connecting rod is mounted between the connecting frame and the connecting plate. The screw is mounted on the rotary driver and between the connecting frame and the connecting plate, and rotates around the first direction under the drive of the rotary driver. The moving block is sleeved on at least one connecting rod and the screw, and screwed to the screw.

3. The negative pressure sealing device for a paper stabilizer as described in claim 2, characterized in that, The fixing frame includes two mounting plates and a plurality of first guide rods. Both mounting plates are mounted on the active member, and the plurality of first guide rods are mounted between the two mounting plates.

4. The negative pressure sealing device for a paper stabilizer as described in claim 3, characterized in that, The driven member includes a driven block and two hinged rods. The driven block is sleeved on a plurality of first guide rods. The two hinged rods are hinged between the moving block and the driven block and are respectively located at both ends of the driven block.

5. The negative pressure sealing device for a paper stabilizer as described in claim 4, characterized in that, The hinge rod is hinged to one end of the movable block near the fixed base.

6. The negative pressure sealing device for a paper stabilizer as described in claim 2, characterized in that, The active component also includes a plurality of second guide rods, which are all mounted on the connecting frame and pass through the fixed base.

7. The negative pressure sealing device for a paper stabilizer as described in claim 1, characterized in that, The clamping arm includes an arm body, two limiting seats and multiple limiting rods. The two limiting seats are respectively connected to both ends of the arm body, and the multiple limiting rods are installed between the two limiting seats and pass through multiple elastic structures.

8. The negative pressure sealing device for a paper stabilizer as described in claim 7, characterized in that, The clamping arm also includes a sealing gasket, which is installed on the clamping block and abuts against the clamping block and the arm body.

9. The negative pressure sealing device for a paper stabilizer as described in claim 1, characterized in that, The sealing strip includes a strip body, two first protrusions and two second protrusions. The two first protrusions are respectively formed on both sides of the strip body along the second direction, and the two second protrusions are respectively formed on both sides of the strip body along the second direction. The first protrusions and the second protrusions are arranged at intervals along the first direction.

10. The negative pressure sealing device for a paper stabilizer as described in claim 1, characterized in that, The sealing assembly is configured as a plurality of components, and all of the plurality of sealing assemblies are installed on the air box.

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