Paper machine water needle roll changing device

Abstract

This utility model discloses a paper machine water jet changing device, including a support and a housing connected to the support. The bottom plate of the housing has two straight holes. Two sliding plates are installed inside the housing. Each sliding plate has a connecting block at its bottom. Each connecting block extends downwards from its corresponding straight hole and has a connecting pipe. The inlet end of each connecting pipe is connected to a flexible hose, and the outlet end of each connecting pipe is connected to a water jet. Each sliding plate is equipped with a motor, a gear, and a rack meshing with the gear. The rack is mounted on the bottom plate of the housing, and the motor is mounted on the corresponding sliding plate. The technical solution provided by this utility model greatly improves the movement speed of the water jet, enabling rapid response to changing roll requirements during high-speed paper machine operation, achieving rapid paper web switching, effectively shortening changing roll time, and significantly improving the changing roll efficiency of the take-up section.

Description

Technical Field

[0001] This utility model relates to the field of papermaking technology, and in particular to a paper machine water jet changing device. Background Technology

[0002] Automatic water-jet changers are a solution to improve the changeover efficiency of the take-up section and reduce paper loss at the bottom of the roll. This changeover technology has been widely and successfully applied in modern high-speed wide-width paper machines. Existing water-jet changer devices typically have two water-jet nozzles that can move along the width of the paper web to cut it. However, existing technologies usually use chain drives or screw drives to move the water-jet nozzles, resulting in relatively slow movement speeds that are difficult to meet the changeover requirements of modern high-speed paper machines. In view of the above technical problems, this invention proposes a new water-jet changer device for paper machines that can improve the movement speed of the water-jet nozzles and meet the requirements of high-speed paper machine changeovers. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a paper machine water jet changing device, which aims to solve the technical problem that the existing water jet changing device is difficult to meet the requirements of high-speed paper machine changing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A paper machine water needle changing device includes a support frame and a housing connected to the support frame. The bottom plate of the housing has two straight holes. Two sliding plates are installed inside the housing. Each sliding plate has a connecting block at its bottom. Each connecting block extends downward from the corresponding straight hole and has a connecting pipe. The inlet end of each connecting pipe is connected to a hose, and the outlet end of each connecting pipe is connected to a water needle. Each sliding plate is equipped with a motor and a gear on the motor shaft. A rack is installed on the bottom plate of the housing corresponding to each gear, and each rack meshes with the corresponding gear.

[0006] Furthermore, in the paper machine water needle changing device, two slide rails are respectively provided on the bottom plate of the box for each slide, and multiple sliders are respectively provided on the bottom of each slide, with each slider connected to the corresponding slide rail.

[0007] Furthermore, in the paper machine water needle changing device, in the vertical direction, one connecting pipe is higher than the other connecting pipe, and the two connecting pipes do not interfere with each other.

[0008] Furthermore, in the paper machine water needle changing device, the support includes a crossbeam and two columns.

[0009] Furthermore, in the paper machine water needle changing device, the housing and the crossbeam are connected by at least two connecting seats.

[0010] Furthermore, in the paper machine water needle changing device, each connecting seat includes a straight rod, one end of which is provided with a first end plate, and the other end of which is provided with a second end plate; the first end plate is connected to the crossbeam, and the bottom of the second end plate is provided with a horizontal plate, which is connected to the top of the box.

[0011] Furthermore, in the paper machine water needle changing device, a reinforcing rib is provided between each second end plate and the corresponding horizontal plate.

[0012] Beneficial effects: This utility model provides a paper machine water jet changing device, which has at least the following advantages compared with the prior art:

[0013] (1) Improved roll changing efficiency: The motor, gear and rack drive method greatly improves the movement speed of the water jet compared with the traditional chain drive or screw drive. During the high-speed operation of the paper machine, it can quickly respond to the roll changing demand, realize the rapid switching of paper web, effectively shorten the roll changing time, and significantly improve the roll changing efficiency of the take-up section.

[0014] (2) Reduce paper loss: The fast and precise movement of the water jet makes the cutting of the paper web more accurate, reduces paper loss at the bottom of the paper roll caused by slow water jet movement or position deviation, reduces production costs and increases the paper yield.

[0015] (3) Stable and reliable structure: Two slide rails are set on each slide plate on the bottom plate of the box, and multiple sliders are installed at the bottom of the slide plate. The sliders are connected with the slide rails to provide stable guidance and support for the reciprocating motion of the slide plate, ensuring the smoothness of the water needle during movement, avoiding shaking or deviation, and ensuring the reliability of the roll changing operation.

[0016] (4) Optimized spatial layout: The support adopts a structure of one crossbeam and two columns, which is simple and compact, occupies less installation space, and is more suitable for installation and use in papermaking workshops with limited space. At the same time, the box and the crossbeam are connected by at least two connecting seats. The connecting seat structure is reasonably designed, which further enhances the stability of the entire device and does not add too much space burden. Attached Figure Description

[0017] Figure 1 A perspective view of the paper machine water jet changing device provided by this utility model.

[0018] Figure 2 for Figure 1 A magnified view of part A in the middle.

[0019] Figure 3 A top view of the skateboard and drive unit.

[0020] Figure 4 for Figure 3 A magnified view of part B in the middle section.

[0021] Figure 5 This is a left view of the water jet changer; the support frame is not shown in the figure.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Support frame; 11. Crossbeam; 12. Column;

[0024] 2. Connecting seat; 20. Straight rod; 21. First end plate; 22. Second end plate; 23. Horizontal plate; 24. Reinforcing rib;

[0025] 3. Box body; 31. Bottom plate of the box body;

[0026] 41. Skateboard; 42. Slider; 43. Slide rail;

[0027] 51. Electric motor; 52. Gear; 53. Rack;

[0028] 6. Connecting block;

[0029] 71. Hose; 72. Connector; 73. Water needle;

[0030] 91. Paper pages; 92. Paper rolls. Detailed Implementation

[0031] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model is further described in detail below. It should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.

[0032] Please see Figures 1 to 5 This utility model provides a paper machine water needle changing device. The accompanying drawings are for illustrative purposes only and are not proportional to the actual product. The drawings only show structures relevant to the present utility model; some conventional structures (such as valves and pipe fittings) are not specifically shown. Figure 5 The drawing actually depicts two connecting blocks and two flexible hoses. Due to space constraints, only one connecting block (6) and one flexible hose (71) are labeled. For ease of understanding, Figure 5 Page 91 and roll 92 are schematically drawn.

[0033] A paper machine water needle changing device includes a support 1 and a housing 3 connected to the support. The bottom plate 31 of the housing has two straight holes 310. Two slide plates 41 are installed inside the housing, and each slide plate is equipped with a corresponding drive device. Each drive device is used to drive the corresponding slide plate to reciprocate along the length of the housing. Each slide plate 41 has a connecting block 6 at its bottom. Each connecting block extends downward from the corresponding straight hole. Each connecting block is equipped with a connecting pipe 72. The inlet end of each connecting pipe is connected to a hose 71, and the outlet end of each connecting pipe is connected to a water needle 73. Each drive device includes a motor 51, a gear 52 mounted on the motor shaft, and a rack 53 meshing with the gear. The rack is mounted on the bottom plate of the housing, and the motor is mounted on the corresponding slide plate.

[0034] The interaction between the skateboard and the housing can be achieved as follows: Two rails 43 are installed on the bottom plate of the housing for each skateboard, and multiple sliders 42 are installed on the bottom of each skateboard, with each slider connected to its corresponding rail. The sliders are not visible from the attached diagram, so they are represented schematically by dashed lines. In practical applications, two or four sliders can be installed on the bottom of each skateboard to ensure a stable connection between the sliders and the rails.

[0035] like Figure 5 As shown, further, in the vertical direction, one nozzle is higher than the other, and the two nozzles do not interfere with each other. In actual operation, the nozzles move back and forth in a straight line with the slide plate. Since there is a certain gap between the two nozzles in the height direction, they will not interfere with each other during movement.

[0036] Furthermore, the support 1 includes a crossbeam 11 and two columns 12. The support structure is simple and occupies a small installation space.

[0037] Furthermore, the box body and the crossbeam are connected by at least two connecting seats 2.

[0038] Specifically, each connecting seat 2 includes a straight rod 20, with a first end plate 21 at one end and a second end plate 22 at the other end. The first end plate is connected to the crossbeam, and a horizontal plate 23 is provided at the bottom of the second end plate, which is connected to the top of the housing. Preferably, the first end plate and the crossbeam are connected by bolts, and the horizontal plate and the housing are connected by bolts (not shown in the attached drawings).

[0039] Furthermore, a reinforcing rib 24 is provided between each second end plate and its corresponding horizontal plate. By providing the reinforcing rib, the connection strength between the second end plate and the horizontal plate is improved.

[0040] In practical applications, water jet changers are usually also equipped with a glue spraying mechanism. Since the glue spraying mechanism is a standard feature of water jet changers and is not the point of invention of this application, the glue spraying mechanism is not shown in the accompanying drawings, and it will not be specifically described or limited in this document.

[0041] In practical applications, the aforementioned hose is connected to the high-pressure water source in the workshop (not shown in the figure). Before changing the roll, the two water jets move to the middle position of the housing, at which point the spray position of the two water jets corresponds to the middle of the paper width direction (…). Figure 5 The dashed line indicates the direction of water jet spray. When it is necessary to change the paper roll 92, high-pressure water is sprayed from the two water jets to the middle of the paper sheet 91 in the width direction. At the same time, the two drive devices drive the slider to move in opposite directions (towards the end of the box respectively), and the two water jets also move in opposite directions accordingly, thereby realizing the rapid switching of the paper web.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. It is understood that those skilled in the art can make equivalent substitutions or modifications based on the technical solution and inventive concept of the present utility model, and all such modifications or substitutions should fall within the protection scope of the present utility model.

Claims

1. A paper machine water jet changing device, comprising a support frame and a housing connected to the support frame, characterized in that: The bottom plate of the housing has two straight holes. Inside the housing are two sliding plates. Each sliding plate has a connecting block at its bottom. Each connecting block extends downward from its corresponding straight hole and has a connecting pipe. The inlet end of each connecting pipe is connected to a hose, and the outlet end of each connecting pipe is connected to a water needle. Each sliding plate has a motor with a gear on its main shaft. The bottom plate of the housing has a rack corresponding to each gear, and each rack meshes with its corresponding gear.

2. The paper machine water jet changing device according to claim 1, characterized in that: The bottom plate of the box has two slide rails for each slide, and the bottom of each slide has multiple sliders, each slider being connected to the corresponding slide rail.

3. The paper machine water jet changing device according to claim 1, characterized in that: In the vertical direction, one pipe is higher than the other, and the two pipes do not interfere with each other.

4. The paper machine water jet changing device according to claim 1, characterized in that: The support structure consists of a crossbeam and two uprights.

5. The paper machine water jet changing device according to claim 4, characterized in that: The box body and the crossbeam are connected by at least two connecting seats.

6. The paper machine water jet changing device according to claim 5, characterized in that: Each connector includes a straight rod, with a first end plate at one end and a second end plate at the other end; the first end plate is connected to the crossbeam, and a horizontal plate is provided at the bottom of the second end plate, which is connected to the top of the housing.

7. The paper machine water jet changing device according to claim 6, characterized in that: Each second end plate is provided with a reinforcing rib between itself and the corresponding horizontal plate.

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