Paper machine forming roll sleeve installation tooling and installation method

Abstract

This invention relates to the field of paper machine retrofitting technology, and more particularly to a tooling and method for installing a forming roll wire sleeve. It includes a tapered tube, a support assembly, an adjustment assembly, a transmission assembly, and a heating assembly. The wide end of the tapered tube has a lip corresponding to the forming roll shell, and the tapered tube connects to the forming roll shell through the lip. The length of the tapered tube is adapted to the length of the forming roll shell. The support assembly supports the forming roll, the adjustment assembly adjusts the position of the roll core, the transmission assembly drives the forming roll to rotate, and the heating assembly heats the wire sleeve, causing it to adhere to the outer circumference of the forming roll shell. This invention shortens the maintenance cycle, reduces retrofitting costs, and achieves simple and efficient installation and heating of the wire sleeve, making it easier for the wire sleeve to adhere to the roll surface and preventing defects such as warping.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paper machine reconstruction, in particular to a paper machine forming roll net cover installation tool and installation method. BACKGROUND

[0002] There are various types of paper, and different types of paper require different paper machines for production. The existing paper machine in the workshop was originally used to produce packaging paper. However, due to the adjustment of production plan, the paper machine for producing packaging paper needs to be changed to a paper machine suitable for producing cultural paper. The forming roll shell of this paper machine was originally designed for packaging paper. If it is changed to produce cultural paper, the process will change due to the difference in paper types. Therefore, in order to improve the quality of paper, a polyurethane net cover needs to be sleeved on the existing forming roll shell to evenly spray the paper pulp onto the net cover. The net cover can absorb part of the water in the paper pulp, thereby achieving better dewatering effect of the paper pulp. At the same time, the paper pulp attached to the net cover will also be more uniform, thereby adapting to the production of cultural paper.

[0003] The existing forming roll body has a diameter of 1800mm, a roll body length of 10650mm, a total length of 12425mm, and a weight of 38.9 tons. Therefore, the installation of the forming roll net cover must be completed using a special tool. The original design does not provide a special tool, and the outsourcing cycle is too long and the cost is high. Therefore, a special tool suitable for replacing the net cover of the forming roll needs to be designed. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art, and to provide a paper machine forming roll net cover installation tool and installation method, which shortens the maintenance cycle, reduces the reconstruction cost, realizes the installation and heating of the net cover, is simple, convenient and efficient, makes the net cover more easily adhere to the surface of the roll body, and prevents the generation of adverse phenomena such as edge lifting.

[0005] The present application provides a paper machine forming roll net cover installation tool, which comprises a tapered pipe, a supporting assembly, an adjusting assembly, a transmission assembly and a heating assembly. The wide end of the tapered pipe is provided with a lip corresponding to the forming roll shell, and the tapered pipe is connected with the forming roll shell through the lip. The length of the tapered pipe is adapted to the length of the forming roll shell. The supporting assembly is used to support the forming roll. The adjusting assembly is used to adjust the position of the roll core. The transmission assembly is used to drive the forming roll to rotate. The heating assembly is used to heat the net cover, so that the net cover is adhered to the outer periphery of the forming roll shell.

[0006] The transmission assembly comprises a power device, a first transmission wheel corresponding to the transmission shaft of the forming roll, and a second transmission wheel corresponding to the output end of the power device. The first transmission wheel and the second transmission wheel are connected through a transmission device.

[0007] The heating assembly comprises a heating device, a track corresponding to the running track of the heating device, a first temperature test paper and a second temperature test paper.

[0008] The support assembly comprises a first base arranged corresponding to the first bearing seat of the transmission side of the forming roller, a second base arranged corresponding to the second bearing seat of the roller core side, a third base arranged corresponding to the bottom end of the power device, and a cushion block arranged corresponding to the non-transmission side of the forming roller shell.

[0009] The adjusting assembly comprises an extension shaft arranged corresponding to the support shaft of the forming roller, a bracket mechanism arranged corresponding to the extension shaft, the bracket mechanism comprising a first part, a second part and a third part, the first part, the second part and the third part being arranged in a U shape, the bracket mechanism being connected with the forming roller through the third part, and adjustment devices being arranged at both ends of the upper part of the first part along the axial direction of the extension shaft.

[0010] The top end of the first part is adapted to the shape of the extension shaft.

[0011] The application provides a paper machine forming roller net cover installation method, comprising the following steps:

[0012] S1: net cover installation preparation: the roller core in the forming roller is pulled out, and the wide end of the taper pipe is connected with the non-transmission side of the forming roller shell;

[0013] S2: net cover installation: the net cover is completely sleeved into the taper pipe from the narrow end of the taper pipe, and then the net cover is pulled to the forming roller shell;

[0014] S3: heating preparation: the taper pipe is removed, the roller core is installed into the forming roller shell, the support assembly is installed, the transmission assembly is installed, the track is installed, and the heating device is pushed in;

[0015] S4: net cover heating: the first temperature test paper is uniformly distributed along the length direction of the net surface, the power device is started, the heating device is started, the heating device is moved along the track, after the temperature of the net cover reaches a predetermined value, the heating device is turned off, and the power device is turned off; the second temperature test paper is replaced, the power device is started, the heating device is started, the heating device is moved along the track, after the temperature of the net cover reaches a predetermined value, the heating device is turned off, and the power device is turned off;

[0016] S5: tool removal: the support assembly, the transmission assembly and the heating assembly are removed.

[0017] The net cover is guided by the taper pipe, the net cover is sleeved into the outer periphery of the forming roller shell with the assistance of the support assembly, and the net cover is heated and shrunk twice, so that the shrinking effect is better.

[0018] Further, in step S2, after the net cover is completely sleeved into the taper pipe from the narrow end of the taper pipe, it is checked whether there is foreign matter in the net cover, and the foreign matter is taken out. In the heating process, the foreign matter is prevented from being sealed in the net cover, so as to affect the paper production effect.

[0019] Further, in step S2, when the sleeve is pulled close to the driving side of the forming roller shell, the sleeve near the narrow end of the cone pipe is turned outward, and after the sleeve is pulled into place, the forming roller shell can be leaked out, which facilitates the installation of the support assembly. Before heating, the sleeve flange is restored to its original state. When the cone pipe is removed, the free end of the forming roller shell loses support and needs to be supported to ensure that the forming roller shell remains balanced, preparing for the subsequent installation of the roller core.

[0020] Further, in step S3, after the roller core is installed in the forming roller shell, the adjustment assembly is installed to adjust the roller core to the center position. After the roller core is installed, under the action of gravity, the end deep into the forming roller shell will tilt downward, and through the adjustment assembly, the roller core is adjusted to prevent the roller core from rubbing the inner wall of the shell.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The maintenance cycle is shortened, the modification cost is reduced, the installation and heating of the sleeve are realized, which is simple, efficient, makes the sleeve more easily adhere to the surface of the roller body, and prevents the generation of adverse phenomena such as edge lifting. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structure diagram of the connection of the cone pipe and the forming roller shell of the present application;

[0024] Figure 2 is a front view structure diagram of the present application embodying the forming roller, the support assembly and the transmission assembly;

[0025] Figure 3 is a right view structure diagram of the present application embodying the forming roller, the support assembly and the transmission assembly;

[0026] Figure 4 is a right view structure diagram of the heating device of the present application;

[0027] Figure 5 is a front view structure diagram of the support mechanism of the present application.

[0028] In the figure: 1, cone pipe; 2, lip; 3, forming roller shell; 4, first bearing seat; 5, first base; 6, pad; 7, second base; 8, second bearing seat; 9, roller core; 10, first transmission wheel; 11, extension shaft; 12, support mechanism; 121, first part; 122, second part; 123, third part; 13, conveying device; 14, power device; 15, second transmission wheel; 16, third base; 17, heating device; 18, adjustment device. DETAILED DESCRIPTION

[0029] The present application will be further described below in conjunction with the embodiments:

[0030] Embodiment 1

[0031] As Figures 1-5 shown, the paper machine forming roll net cover installation tool of the application comprises a taper pipe 1, a support assembly, an adjusting assembly, a transmission assembly and a heating assembly, the wide end of the taper pipe 1 is provided with a lip 2 corresponding to the forming roll shell 3, the taper pipe 1 is connected with the forming roll shell 3 through the lip 2, the length of the taper pipe 1 is adapted to the length of the forming roll shell 3, the support assembly is used for supporting the forming roll, the adjusting assembly is used for adjusting the position of the roll core 9, the transmission assembly is used for driving the forming roll to rotate, and the heating assembly is used for heating the net cover so that the net cover is attached to the outer periphery of the forming roll shell 3.

[0032] Preferably, the transmission assembly comprises a power device 14, a first transmission wheel 10 corresponding to the transmission shaft of the forming roll and a second transmission wheel 15 corresponding to the output end of the power device 14, and the first transmission wheel 10 and the second transmission wheel 15 are coupled through a transmission belt 13. The power device 14 is a speed reducer, and the transmission belt 13 is provided corresponding to the first transmission wheel 10 and the second transmission wheel 15.

[0033] The heating assembly comprises a heating device 17, a track corresponding to the running track of the heating device 17, first temperature test paper and second temperature test paper. The heating device 17 is an oven, the first temperature test paper is test paper of 77-130 degrees, and the second temperature test paper is test paper of 132-182 degrees.

[0034] The support assembly comprises a first base 5 corresponding to the first bearing seat 4 on the transmission side of the forming roll, a second base 7 corresponding to the second bearing seat 8 on the side of the roll core 9, a third base 16 corresponding to the bottom end of the power device 14, and a pad 6 corresponding to the non-transmission side of the forming roll shell 3.

[0035] The adjusting assembly comprises an extension shaft 11 corresponding to the support shaft of the forming roll, a bracket mechanism 12 corresponding to the extension shaft 11, the bracket mechanism 12 comprising a first part 121, a second part 122 and a third part 123, the first part 121, the second part 122 and the third part 123 being arranged in a U shape, the bracket mechanism 12 being connected with the forming roll through the third part 123, and adjustment devices 18 being arranged on both ends of the upper part of the first part 121 along the axial direction of the extension shaft 11.

[0036] The top end of the first part 121 is adapted to the shape of the extension shaft 11.

[0037] The application provides a paper machine forming roll net cover installation method, comprising the following steps:

[0038] S1: Net cover installation preparation: the roll core 9 in the forming roll is pulled out, and the wide end of the taper pipe 1 is connected with the non-transmission side of the forming roll shell 3 through a sling;

[0039] S2: net cover installation: the bottom of the non-drive side end of the forming roll shell 3 is placed with a cushion block 6, the cushion block 6 can be a cushion wood, which is low in cost and easy to process, the cone pipe 1 is in a hanging state, the net cover is completely sleeved into the cone pipe 1 from the narrow end of the cone pipe 1, the narrow end of the cone pipe 1 is lifted with a sling, the cushion block 6 is taken out, the net cover is pulled to the forming roll shell 3 with a large force clamp;

[0040] S3: heating preparation: the cone pipe 1 is removed, the roll core 9 is installed into the forming roll shell 3, the support assembly is installed, the transmission assembly is installed, the track is installed, and the heating device 17 is pushed in;

[0041] S4: net cover heating: the first temperature test paper is evenly distributed at four positions along the length direction of the net surface, four first temperature test papers are evenly pasted at each position, the power device 14 is started, the rotating speed of the forming roll is controlled by the power device 14 to be about 8r / min, the heating device 17 is started, after the temperature of the heating device 17 is stabilized, the heating device 17 is moved to the predetermined heating position along the track, the heating device 17 is slowly moved along the track, the temperature of the first temperature test paper is observed, when the temperature of the first temperature test paper of the whole roll net surface reaches about 120℃, the heating device 17 is quickly pushed out and the heating device 17 and the power device 14 are closed; whether the roll surface net cover has been shrunk is checked, the second temperature test paper is replaced, the power device 14 is started again, the rotating speed of the forming roll is controlled by the power device 14 to be about 8r / min, the heating device 17 is started, the heating device 17 is moved along the track, after the temperature of the heating device 17 is stabilized, the heating device 17 is moved to the predetermined heating position along the track, the heating device 17 is slowly moved along the track, the temperature of the second temperature test paper is observed, when the temperature of the second temperature test paper of the whole roll net surface reaches about 160℃, the heating device 17 is quickly pushed out and the heating device 17 and the power device 14 are closed; whether the net surface is abnormal is checked, after the temperature is cooled, the net surface is checked again and the joint line head is cut off, and the roll surface is wrapped.

[0042] S5: tool disassembly: the support assembly, the transmission assembly and the heating assembly are disassembled.

[0043] The net cover is guided by the cone pipe 1, the net cover is sleeved into the outer periphery of the forming roll shell 3 with the assistance of the support assembly, the net cover is heated and shrunk twice, and the shrinking effect is better.

[0044] Further, in step S2, after the net cover is completely sleeved into the cone pipe 1 from the narrow end of the cone pipe 1, whether there is foreign matter in the net cover is checked, and the foreign matter is taken out. It is prevented that the foreign matter is sealed in the net cover during the heating process, and the paper production effect is affected.

[0045] Further in step S2, when the sleeve is pulled to the driving side of the forming roller shell 3, the sleeve near the narrow end of the taper pipe 1 is turned outward, and after the sleeve is pulled into place, the end of the non-driving side of the forming roller shell 3 can be leaked out, the bottom of the end of the non-driving side of the forming roller shell 3 is placed with a pad 6, then the taper pipe 1 is removed, the roller core 9 is installed into the forming roller shell 3, the second bearing seat 8 on the side of the roller core 9 supports the forming roller, then the pad 6 is removed, and before heating, the turned edge of the sleeve is restored to its original state.

[0046] Further in step S3, after the roller core 9 is installed into the forming roller shell 3, the adjusting assembly is installed, and the roller core 9 is adjusted to the center position. After the roller core 9 is installed, under the action of gravity, the end deep into the forming roller shell 3 will be inclined downward, the roller core 9 is adjusted by the adjusting assembly, and it is better to be able to be rotated by hand, so as to prevent the roller core 9 from rubbing the inner wall of the shell.

[0047] In the present application, the description of the direction and relative position relationship of the structure, such as front, back, left, right, up and down, does not constitute a limitation on the present application, but is only for convenience of description.

Claims

1. A paper machine forming roll screen mounting tool characterized by, The paper machine forming roll net cover installation method comprises the following steps: S1: net cover installation preparation: the roll core (9) in the forming roll is pulled out, and the wide end of the taper pipe (1) is connected with the non-driving side of the forming roll shell (3); S2: net cover installation: the net cover is completely sleeved into the taper pipe (1) from the narrow end of the taper pipe (1), and then the net cover is pulled to the forming roll shell (3); S3: heating preparation: remove the taper pipe (1), put the roll core (9) into the forming roll shell (3), install the supporting assembly, install the transmission assembly, install the track, and push in the heating device (17); S4: net cover heating: the first temperature test paper is uniformly distributed along the length direction of the net surface, the power device (14) is started, the heating device (17) is started, the heating device (17) is moved along the track, after the temperature of the net cover reaches the predetermined value, the heating device (17) is closed, and the power device (14) is closed; the second temperature test paper is replaced, the power device (14) is started, the heating device (17) is started, the heating device (17) is moved along the track, after the temperature of the net cover reaches the predetermined value, the heating device (17) is closed, and the power device (14) is closed; 2. The paper machine forming roll screen mounting tool of claim 1, wherein, S5: tool removal: the supporting assembly, the transmission assembly and the heating assembly are removed.

3. A method for installing a paper machine forming roll cover using the paper machine forming roll cover installation tool of any one of claims 1-2, characterized in that, ​ ​ ​ ​ ​ ​ 4. The method of installing a paper machine forming roll cover as defined in claim 3, wherein, In step S2, after the net cover is completely sleeved into the narrow end of the taper pipe (1), check whether there is foreign matter in the net cover, and take out the foreign matter.

5. The paper machine forming roll sleeve mounting method according to claim 3 or 4, characterized in that In step S2, when the net cover is pulled close to the driving side of the forming roller shell (3), the net cover close to the narrow end of the taper pipe (1) is turned outward, and after the net cover is pulled into place, the forming roller shell (3) can be leaked out, which is convenient for installing the supporting assembly, and the turned edge of the net cover is restored before heating.

6. The method of mounting a paper machine forming roll cover as defined in claim 3, wherein, In step S3, after the roller core (9) is installed in the forming roller shell (3), the adjusting assembly is installed, and the roller core (9) is adjusted to the center position.

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