On-line papermaking drying cylinder descaling device

Abstract

The utility model discloses an online papermaking drying cylinder descaling device, which belongs to the technical field of papermaking equipment and comprises a main support, an infiltrating roller, a cleaning roller, a scraper and a receiving disc. The wetting roller, the cleaning roller and the scraper are sequentially arranged in the circumferential direction of the drying cylinder, the wetting roller and the cleaning roller are both in rotating contact with the drying cylinder, and the scraper and the drying cylinder are arranged in a spaced mode; a spraying pipe is arranged on the main support, and the spraying pipe sprays water downwards in an inclined mode towards the side, away from the drying cylinder, of the soaking roller; attachments on the drying cylinder are wetted by the wetting roller and then are removed by the cleaning roller and the scraper in sequence; the receiving disc is used for receiving the removed attachments; cleaning operation can be continuously carried out in the working process of the drying cylinder, and the descaling efficiency is improved; and the drying cylinder and the blanket are effectively ensured to be clean and pollution-free by utilizing the matching of the infiltrating roller, the cleaning roller and the scraper.

Description

TECHNICAL FIELD

[0001] The utility model relates to papermaking equipment technical field, concretely relates to a kind of online papermaking drying cylinder scale removal device. BACKGROUND

[0002] Papermaking generally consists of pulp web, squeezing dewatering part, drying cylinder drying part, calendering part and winding part. Drying cylinder drying part is a main part of papermaking, and its purpose is to heat and dry the wet paper after squeezing, so that the moisture content of the paper is reduced and the paper is dried. The current heating method is mainly through drying cylinder heating. The drying cylinder is a mechanical device that continuously dries the paper blank after the paper pulp is formed. A rotatable shaft is provided on the end cover of the drying cylinder. Steam for drying the paper is introduced through the hollow shaft hole. During the heating process of the drying cylinder, the wet paper is adhered to the hot surface of the drying cylinder through the drying felt. The drying cylinder transfers heat to the wet paper, and the paper is heated and dried. The drying cylinder is usually made of cast iron and polished on the outer surface. The characteristics of the cast iron with multiple graphite sheets can easily separate the paper blank from the cylinder surface, so that the paper is not stuck during drying.

[0003] During actual operation, when the wet paper is introduced into the drying part through the squeezing felt from the squeezing part, a problem is encountered. The temperature of the wet paper is generally around 30°C (this temperature varies with the season). If the surface temperature of the drying cylinder is high at this time, a temperature difference will occur. When the temperature difference reaches a certain level, the wet paper will have a relatively strong adhesion to the surface of the drying cylinder, which may cause the paper to be rough, or even cause the drying cylinder surface to be unable to be cleaned properly, forming a scale layer and greatly reducing the drying efficiency of the drying cylinder. In severe cases, it may cause the paper to break, affecting the normal operation of the paper machine. SUMMARY

[0004] To solve the problem of scale layer formation on the surface of the drying cylinder during the papermaking process, the present utility model provides an online papermaking drying cylinder scale removal device.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides an online papermaking drying cylinder scale removal device for removing the adhering matter remaining on the drying cylinder. The device comprises a main support, a soaking roller, a cleaning roller, a scraper and a receiving disc. The soaking roller, the cleaning roller and the scraper are arranged in sequence in the circumferential direction of the drying cylinder. The soaking roller and the cleaning roller are in rotational contact with the drying cylinder. The scraper is arranged at a distance from the drying cylinder. A spray pipe is provided on the main support. The spray pipe sprays water downwardly and obliquely away from the side of the soaking roller facing the drying cylinder.

[0007] The adhesion on the dryer is wetted by the soaking roller, and then is removed by the cleaning roller and the scraper in sequence.

[0008] In the online dryer descaling device, the soaking roller is a wool roller.

[0009] In the online dryer descaling device, the main support is arc-shaped and surrounds the cleaning roller and the soaking roller on the side away from the dryer.

[0010] In the online dryer descaling device, the main support comprises two arc-shaped end plates, and a plurality of connecting rods are arranged between the two end plates, the connecting rods are distributed in the circumferential direction of the end plates, and the two ends of the connecting rods are fixedly connected to the two end plates respectively.

[0011] In the online dryer descaling device, the connecting rods are hollow tubes.

[0012] In the online dryer descaling device, the main support is provided with a shielding plate on the side away from the dryer.

[0013] In the online dryer descaling device, two first support rods are fixed to the main support and are located at the two ends of the dryer in the axial direction respectively, the first support rods extend horizontally towards the side close to the dryer, and the two ends of the cleaning roller are rotatably installed on the two first support rods respectively.

[0014] The main support is provided with a driving device for driving the cleaning roller to rotate, and the cleaning roller rotates in the same direction as the dryer.

[0015] In the online dryer descaling device, a second support rod is rotatably installed on the first support rod, and the soaking roller is rotatably installed on the upper end of the second support rod, an elastic element is arranged between the second support rod and the first support rod, and the elastic element exerts an elastic force on the second support rod to pull the soaking roller towards the dryer.

[0016] In the online dryer descaling device, a third support rod is fixed to the main support and extends horizontally towards the dryer, and the scraper is adjustably installed on the third support rod through a mounting shaft.

[0017] In the online dryer descaling device, the spraying pipe is provided with a control valve.

[0018] The beneficial effects of the online dryer descaling device are as follows:

[0019] The online papermaking drying cylinder descaling device can continuously clean during the working process of the drying cylinder, and the descaling efficiency is improved.

[0020] By cooperation of the soaking roller, the cleaning roller and the scraper, the adhering matters on the drying cylinder are soaked by the soaking roller first, and then cleaned by the cleaning roller and the scraper in sequence, so that the cleaning is thorough, and the drying cylinder and the blanket are effectively ensured to be clean and pollution-free.

[0021] The online papermaking drying cylinder descaling device has simple and reasonable overall structure, and has no influence on the drying cylinder and surrounding equipment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a front view of the online papermaking drying cylinder descaling device of the utility model;

[0023] Figure 2 It is a three-dimensional structure schematic view of the online papermaking drying cylinder descaling device of the utility model;

[0024] Figure 3 It is a partial sectional view of the online papermaking drying cylinder descaling device of the utility model;

[0025] Figure 4 It is an assembly structure schematic view of the scraper and the mounting shaft in the online papermaking drying cylinder descaling device of the utility model.

[0026] In the drawing:

[0027] 1-drying cylinder, 2-lead paper roller, 3-drying cylinder blanket, 4-end plate; 5-shielding plate, 6-soaking roller, 7-first supporting rod, 8-second supporting rod, 9-receiving disc, 10-rotating shaft, 11-elastic element, 12-cleaning roller, 13-scraper, 14-mounting shaft, 15-third supporting rod, 16-connecting rod, 17-spraying pipe, 18-locking screw, 19-clamping groove. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of those skilled in the art, the utility model is further described below in combination with the drawings.

[0029] Please refer to Figure 1 The drying cylinder blanket 3 is conveyed under the guidance of the lead paper roller 2 and the drying cylinder 1, the drying cylinder blanket 3 has a large covering angle with the drying cylinder 1, and the contact area is large, so that the drying efficiency of the drying cylinder 1 is ensured. The online papermaking drying cylinder descaling device is arranged in the area of the drying cylinder 1 which is not covered by the drying cylinder blanket 3, and the adhering matters remaining on the drying cylinder 1 are cleaned.

[0030] Please refer to Figures 1-3This invention provides an embodiment of an online paper drying cylinder descaling device, comprising an impregnation roller 6, a cleaning roller 12, and a doctor blade 13. Both the impregnation roller 6 and the cleaning roller 12 are in rotatable contact with the drying cylinder 1. The moisture carried on the impregnation roller 6 can wet the adhesive on the drying cylinder 1. The impregnation roller 6 can be made of wool and has a certain elastic deformation, allowing it to make partial contact with the drying cylinder 1. This results in a large contact area with the adhesive, a good impregnation effect, and facilitates subsequent cleaning by the cleaning roller 12 and the doctor blade 13.

[0031] Specifically, the online paper drying cylinder descaling device is equipped with a main support, which includes two arc-shaped end plates 4. Several connecting rods 16 are arranged between the two end plates 4, spaced apart circumferentially on the end plates 4, with each end of a connecting rod 16 fixedly connected to one of the two end plates 4. The connecting rods 16, connected to the two end plates 4, form an arc-shaped main support that surrounds the cleaning roller 12 and the impregnating roller 6 on the side facing away from the drying cylinder 1, thus occupying minimal space.

[0032] Furthermore, the main support has a baffle plate 5 on the side away from the drying cylinder 1, which can block the splashes of the cleaning roller 12 and prevent contamination of the drying cylinder blanket 3, the paper attached to it, and other nearby equipment.

[0033] A first support rod 7 is fixed on the end plate 4, extending horizontally towards the side closest to the drying cylinder 1; two end plates 4 correspond to two first support rods 7, and the two ends of the cleaning roller 12 are rotatably mounted on the two first support rods 7 respectively. A motor and other driving equipment are also fixed on the main support for driving the cleaning roller 12 to rotate. The rotation direction of the cleaning roller 12 is the same as that of the drying cylinder 1, i.e., as shown... Figure 1 In the shown state, the drying cylinder 1 rotates clockwise, and the cleaning roller 12 also rotates clockwise. The rotational trends of the two at their contact points are opposite, which facilitates the cleaning roller 12 in removing the deposits on the drying cylinder 1. The cleaning roller 12 can be a brush roller, which rotates under the drive of a motor to continuously clean the deposits on the outer circumference of the drying cylinder 1. In practical applications, the first support rod 7 can be connected to the cleaning roller 12 via a bearing seat; the cleaning roller 12 is rotatably mounted on the bearing seat, and the bearing seat can slide relative to the first support rod 7 to move closer to or away from the drying cylinder 1 when adjusted, thus allowing the center distance between the cleaning roller 12 and the drying cylinder 1 to be adjusted as needed; when the cleaning roller is working normally, the bearing seat and the first support rod 7 are locked.

[0034] The soaking roller 6 is installed on the first supporting rod 7 through the second supporting rod 8 and the rotating shaft 10. Specifically, the two ends of the rotating shaft 10 are rotatably installed on the two first supporting rods 7 respectively, and the lower end of the second supporting rod 8 is fixedly connected with the end of the rotating shaft 10. The number of the second supporting rod 8 is two, and the two ends of the soaking roller 6 are rotatably installed on the upper ends of the two second supporting rods 8 respectively. The elastic element 11 is arranged between the second supporting rod 8 and the first supporting rod 7, and the elastic element 11 exerts an elastic force on the second supporting rod 8 to pull the soaking roller 6 towards the drying cylinder 1, so as to ensure that the soaking roller 6 has a certain contact pressure with the drying cylinder 1. The elastic element 11 can be an elastic rubber sleeve or a spring.

[0035] The main support is provided with a spraying pipe 17, the spraying pipe 17 is provided with a plurality of water spraying openings, and the water spraying openings are uniformly distributed in the axial direction of the spraying pipe 17. The spraying pipe 17 sprays water to the side of the soaking roller 6 away from the drying cylinder 1, and does not splash on the drying cylinder 1, thereby affecting the drying effect of the paper. Preferably, the connecting rod 16 is a hollow pipe, which can not only reduce the overall weight and material consumption of the main support, but also can be used as the spraying pipe 17, that is, the spraying pipe 17 is integrated on the main support.

[0036] The water spraying opening of the spraying pipe 17 is preferably a horn shape, which covers a large range in the circumferential direction of the soaking roller 6, and can clean the soaking roller 6 and supply water. Meanwhile, the spraying pipe 17 also covers a large range in the axial direction, so as to avoid the existence of a spraying blind area. The spraying pipe 17 can be provided with a control valve to control the water outlet speed and water outlet amount.

[0037] The scraper 13 is located below the cleaning roller 12, and the scraper 13 is arranged in a spaced manner with the drying cylinder 1, and the two have a certain gap to avoid direct hard contact and scratch the outer circumferential surface of the drying cylinder 1. The drying cylinder 1 is cleaned by the cleaning roller 12 and then the residual material is scraped off by the scraper 13. The scraper 13 is installed on the third supporting rod 15 through the installation shaft 14, and the third supporting rod 15 is fixedly connected with the main support 3. Specifically, as shown in Figure 4 the installation shaft 14 is provided with an axially extending clamping groove 19, and the scraper 13 is clamped with the clamping groove 19. The side wall of the clamping groove 19 can be provided with a screw hole, and the scraper 13 is clamped by the locking screw 18. The gap between the scraper 13 and the drying cylinder 1 can also be adjusted by rotating the installation shaft 14.

[0038] The scraper 13 and the lower side of the main support are provided with the receiving disc 9, which can collect the adhering material cleaned by the cleaning roller 12 and the adhering material scraped off by the scraper 13. Overall, the scraper 13, the cleaning roller 12, the soaking roller 6, the spraying pipe 17 and the shielding plate 5 form a nearly closed annular shape, and the splashing material in the rotating process of the cleaning roller 12 cannot splash outward. Even if the splashing material splashes on the soaking roller 6, the soaking roller 6 can be cleaned by the tangential spraying of the spraying pipe 17.

[0039] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An online paper drying cylinder descaling device for removing residues remaining on the drying cylinder (1); characterized in that, The assembly includes a main support, an immersion roller (6), a cleaning roller (12), a scraper (13), and a receiving tray (9). The immersion roller (6), the cleaning roller (12), and the scraper (13) are arranged sequentially around the circumference of the drying cylinder (1). The immersion roller (6) and the cleaning roller (12) are in rotatable contact with the drying cylinder (1), and the scraper (13) is spaced apart from the drying cylinder (1). The main support is equipped with a spray pipe (17), which sprays water downwards at an angle toward the side of the immersion roller (6) away from the drying cylinder (1). The deposits on the drying cylinder (1) are wetted by the immersion roller (6) and then removed by the cleaning roller (12) and the scraper (13) in sequence; the receiving tray (9) receives the removed deposits.

2. The online paper drying cylinder descaling device according to claim 1, characterized in that, The impregnation roller (6) is a wool roller.

3. The online paper drying cylinder descaling device according to claim 1, characterized in that, The main support is arc-shaped and surrounds the cleaning roller (12) and the immersion roller (6) on the side away from the drying cylinder (1).

4. The online paper drying cylinder descaling device according to claim 3, characterized in that, The main support includes two arc-shaped end plates (4), and a plurality of connecting rods (16) are provided between the two end plates (4). The plurality of connecting rods (16) are distributed at intervals in the circumferential direction of the end plates (4), and the two ends of the connecting rods (16) are respectively fixedly connected to the two end plates (4).

5. The online paper drying cylinder descaling device according to claim 4, characterized in that, The connecting rod (16) is a hollow tube.

6. The online paper drying cylinder descaling device according to claim 3, characterized in that, The main support has a baffle plate (5) on the side opposite to the drying cylinder (1).

7. The online paper drying cylinder descaling device according to claim 1, characterized in that, Two first support rods (7) are fixed on the main support, and the two first support rods (7) are located at the two ends of the drying cylinder (1) in the axial direction respectively; the first support rods (7) extend horizontally to the side close to the drying cylinder (1); the two ends of the cleaning roller (12) are rotatably mounted on the two first support rods (7) respectively; The main support is equipped with a driving device for driving the cleaning roller (12) to rotate. The cleaning roller (12) rotates in the same direction as the drying cylinder (1).

8. The online paper drying cylinder descaling device according to claim 7, characterized in that, A second support rod (8) is rotatably mounted on the first support rod (7), and the impregnation roller (6) is rotatably mounted on the upper end of the second support rod (8); an elastic element (11) is provided between the second support rod (8) and the first support rod (7), and the elastic element (11) applies an elastic force on the second support rod (8) to pull the impregnation roller (6) toward the drying cylinder (1).

9. The online paper drying cylinder descaling device according to claim 1, characterized in that, A third support rod (15) is fixed on the main support, and the third support rod (15) extends horizontally toward the drying cylinder (1); the scraper (13) is adjustablely mounted on the third support rod (15) via a mounting shaft (14).

10. The online paper drying cylinder descaling device according to claim 1, characterized in that, The spray pipe (17) is equipped with a control valve.

Images