Special forming net for household paper

Abstract

The utility model discloses a special forming net for household paper, and relates to the technical field of papermaking, a forming net frame body is composed of a net frame and a stand column which are arranged up and down, the forming net frame further comprises an auxiliary dewatering mechanism and a tensioning mechanism, a plurality of supporting rollers are rotatably sleeved at the end point of the net frame, and a papermaking net is supported on the net frame through the supporting rollers. The papermaking net, the driving mechanism and the auxiliary dewatering mechanism are arranged, the water absorption sponge is arranged below the net frame, the water absorption sponge can actively absorb water attached to the papermaking net, and therefore the dewatering efficiency of the papermaking net is improved, and the papermaking net can be conveniently dewatered. In addition, the water absorption sponge can provide auxiliary support on the upper portion of the papermaking net, net body loads caused by too heavy water are reduced, the risk that the net body is damaged due to the too heavy loads is reduced, and due to the fact that the dehydration efficiency is improved and the net body loads are reduced, the production efficiency of the papermaking machine is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of papermaking, and particularly relates to a forming wire special for household paper. Background Art

[0002] The papermaking forming wire is an important forming and dewatering structure in the wet part of papermaking equipment. Commonly used papermaking forming wires include single-layer forming wires, double-layer forming wires, two-and-a-half-layer forming wires, and three-layer forming wires. Among them, the three-layer forming wire is a relatively commonly used papermaking forming wire at present. The papermaking machine for household paper has special requirements for the forming wire. The papermaking machine for household paper has a short wire section, and requires the forming wire to have fast dewatering speed; at the same time, because the paper page of household paper is thin and has a low grammage, it is required that the forming wire has a high fiber support index and no wire marks on the formed paper; in addition, it is required that the produced household paper is soft and fluffy. In order to meet the papermaking requirements of household paper, the existing forming wires special for household paper will adopt forming wires with high stability, high fiber support index of the formed paper layer, and high fiber retention rate. However, such forming wires generally have defects such as poor stiffness, relatively thick wire body thickness, slow dewatering speed of the bottom wire, resulting in an increase in the water content of the wire body, high wire body load, low service life, and restricting production efficiency. Content of the Utility Model

[0003] Aiming at the problems existing in the prior art, the utility model provides a forming wire special for household paper, which can provide auxiliary water absorption and auxiliary support effects through a water-absorbing sponge below the forming wire, thereby improving the dewatering speed of the wire body, reducing the load of the wire body, and further improving the papermaking production efficiency and the service life of the papermaking wire.

[0004] The solution adopted by the utility model to solve its technical problems is as follows: A special forming wire for household paper, which includes a forming wire frame body composed of a wire frame and columns arranged up and down, and also includes an auxiliary dehydration mechanism and a tensioning mechanism. A plurality of support rollers are rotatably sleeved at the end points of the wire frame. The papermaking wire is supported on the wire frame through the support rollers to form a drivable circulating papermaking wire body. A driving mechanism is arranged outside the wire frame. The driving mechanism includes a main sprocket fixedly sleeved at the end of the support roller. A main chain is arranged in a matching manner on the main sprocket. A main motor for controlling the rotation of the main sprocket is installed outside the wire frame. A cross partition arranged inside the support roller is fixed inside the wire frame. The auxiliary dehydration mechanism includes a dehydration tank arranged above the cross partition. A plurality of sponge rollers are horizontally arranged above the dehydration tank. The outer wall of the sponge roller is coated with a layer of water-absorbing sponge. The upper edge of the water-absorbing sponge can contact the inner end surface of the upper part of the papermaking wire. An extrusion water filtering plate is longitudinally movably installed in the dehydration tank through an elastic guiding member. An arc-shaped extrusion part matching the positions and shapes of the respective water-absorbing sponges is arranged on the extrusion water filtering plate. A transmission shaft is rotatably sleeved in the dehydration tank. A secondary sprocket is fixedly sleeved at the same-side ends of one of the support rollers and the transmission shaft. A secondary chain is arranged in a matching manner on the secondary sprocket. The support roller and the transmission shaft are connected by the secondary chain in a transmission manner. An eccentric wheel is fixedly sleeved on the transmission shaft. The eccentric wheel is arranged below the extrusion water filtering plate and can push the extrusion water filtering plate to move.

[0005] Further, the tensioning mechanism includes a rotating shaft rotatably sleeved on the column. Rotating rods are fixedly sleeved at both ends of the rotating shaft. And tensioning pressure rollers are rotatably sleeved at the outer ends of the rotating rods. The tensioning pressure rollers are arranged at the lower part of the wire body of the papermaking wire and are in close contact with the lower end surface of the wire body. A secondary motor for controlling the rotation of the rotating shaft is installed on the column.

[0006] Further, the elastic guiding member includes a plurality of compression springs vertically installed between the extrusion water filtering plate and the inner bottom wall of the dehydration tank. A telescopic rod is vertically installed in the dehydration tank. And the upper end of the telescopic rod is fixed at the bottom of the extrusion water filtering plate.

[0007] Further, a drain hole (610) is opened on one side of the dehydration tank. The inner bottom of the dehydration tank is set as an inclined surface. And a water guiding strip located below the drain hole (610) is arranged on the drainage side of the dehydration tank.

[0008] Further, a cross bar is fixed on the column. A tensiometer is installed on the cross bar. And the measuring rod of the tensiometer contacts the lower end surface of the papermaking wire.

[0009] Further, a secondary sprocket for adjusting the tension of the main chain is installed outside the wire frame.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The utility model improves the dehydration efficiency of the papermaking net by setting a papermaking net, a driving mechanism and an auxiliary dehydration mechanism. By arranging a water-absorbing sponge below the net rack, the water-absorbing sponge can actively absorb the water attached to the papermaking net, thereby improving the dehydration efficiency of the papermaking net. Moreover, the water-absorbing sponge can also provide auxiliary support above the papermaking net, reducing the net body load caused by excessive water carrying, and reducing the risk of damage to the net body due to overloading. Due to the improvement of dehydration efficiency and the reduction of net body load, the production efficiency of the paper machine is improved;

[0012] The extrusion water filtering plate in the auxiliary dehydration mechanism can move up and down reciprocally under the cooperation of the eccentric wheel and the compression spring, so that the water adsorbed in the water-absorbing sponge can be automatically extruded through the extrusion water filtering plate, ensuring the long-term water absorption effect of the sponge. Moreover, the auxiliary dehydration mechanism can be started and stopped synchronously with the operation of the papermaking net, which is convenient for control and operation, and reduces the overall cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 is a schematic diagram of the front view sectional structure of the utility model;

[0015] Figure 3 is a schematic diagram of the structure of the papermaking net and the support roller of the utility model;

[0016] Figure 4 is one of the schematic diagrams of the structure of the auxiliary dehydration mechanism of the utility model;

[0017] Figure 5 is one of the schematic diagrams of the structure of the auxiliary dehydration mechanism of the utility model.

[0018] In the figure: 1, net rack; 2, support roller; 3, papermaking net; 4, driving mechanism; 41, main sprocket; 42, main chain; 43, main motor; 44, motor frame; 45, auxiliary sprocket; 46, auxiliary chain; 47, transmission sprocket; 48, transmission chain; 5, cross partition; 6, auxiliary dehydration mechanism; 61, dewatering tank; 62, sponge roller; 63, water-absorbing sponge; 64, extrusion water filtering plate; 65, telescopic rod; 66, compression spring; 67, transmission shaft; 68, eccentric wheel; 69, water guide strip; 610, drain hole; 7, tensioning mechanism; 71, rotating shaft; 72, rotating rod; 73, tensioning roller; 74, auxiliary motor; 75, tensiometer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the utility model in conjunction with the drawings and embodiments.

[0020] Please refer to Figures 1-5 , the utility model provides a technical solution for a special forming net for household paper: Embodiment

[0021] According to Figure 1 and Figure 3 As shown, the formed grid body is composed of the upper triangular grid 1 and the lower columns. Support rollers 2 are rotatably sleeved at the three end points of the grid 1. The papermaking net 3 is supported on the grid 1 through the support rollers 2 to form a drivable circulating papermaking net body. A driving mechanism 4 is arranged outside the grid 1. The rotation of the support rollers 2 can be controlled through the driving mechanism 4, and then the papermaking net 3 can be driven forward to realize continuous papermaking. The driving mechanism 4 includes driving sprockets 41 fixedly sleeved on the same side of each support roller 2. Driving chains 42 are arranged in a matching manner on the driving sprockets 41. A motor frame 44 is installed outside the grid 1 through a main motor 43. The output end of the motor frame 44 is connected to any one of the driving sprockets 41. The main motor 44 can drive the driving sprocket 41 to rotate. Under the driving action of the driving chain 42, the three support rollers 2 are driven to rotate synchronously, realizing the driving effect of the papermaking net 3.

[0022] As Figure 2 shown, a cross partition 5 is fixedly welded inside the grid 1. The cross partition 5 is arranged inside the papermaking net body. An auxiliary dewatering mechanism 6 is arranged on the grid 1. The auxiliary dewatering mechanism 6 includes a dewatering tank 61 fixed above the cross partition 5. A plurality of sponge rollers 62 are horizontally arranged above the dewatering tank 61 along the rotation direction of the papermaking net 3. A layer of water-absorbing sponge 63 is coated on the outer wall of the sponge roller 62. The upper half of the water-absorbing sponge 63 is exposed outside the dewatering tank 61, and the lower half is located inside the dewatering tank 61. And the upper edge of the water-absorbing sponge 63 can contact the upper inner end surface of the papermaking net 3. The water-absorbing sponge 63 is preferably a polyvinyl alcohol sponge with excellent water absorption effect. The water-absorbing sponge 63 can actively suck the water attached to the papermaking net 3 from below, thereby improving the dewatering efficiency of the papermaking net 3. And the sponge roller 62 and the water-absorbing sponge 63 can also provide support for the upper inner end surface of the papermaking net body, avoiding the net body from being overloaded due to excessive water load. Moreover, the sponge roller 62 and the water-absorbing sponge 63 are rotatably sleeved on the dewatering tank 61. When the papermaking net 3 rotates in a cycle, the friction form between the water-absorbing sponge 63 and the papermaking net 3 is dynamic friction, thereby reducing the friction force between the papermaking net 3 and the water-absorbing sponge 63 and reducing the wear of the papermaking net 3 and the water-absorbing sponge 63. And when the papermaking net 3 rotates, it can also drive the water-absorbing sponge 63 to rotate around the sponge roller 62 through the friction force, automatically changing the water absorption position of the water-absorbing sponge 63.

[0023] An extrusion water filtering plate 64 corresponding to the position of the water absorption sponge 63 is arranged in the dehydration tank 61. The extrusion water filtering plate 64 is arranged below the water absorption sponge 63 and can move longitudinally in the dehydration tank 61. A telescopic rod 65 is vertically installed in the dehydration tank 61. The upper end of the telescopic rod 65 is fixed to the bottom of the extrusion water filtering plate 64 to provide limit guidance for the up and down movement of the extrusion water filtering plate 64. A plurality of compression springs 66 are evenly installed between the extrusion water filtering plate 64 and the inner bottom of the dehydration tank 61. Two transmission shafts 67 are rotatably sleeved left and right in the dehydration tank 61. An eccentric wheel 68 is fixedly sleeved on the transmission shaft 67. When the eccentric wheel 68 is controlled to rotate, it can push the extrusion water filtering plate 64 to move up and down under the cooperation of the compression spring 66, realizing the up and down cyclic movement of the extrusion water filtering plate 64. An arc-shaped extrusion part matching the position and shape of each water absorption sponge 63 is arranged on the extrusion water filtering plate 64. When the extrusion water filtering plate 64 moves upward, it can extrude the water absorption sponge 63, extruding the water adsorbed in the water absorption sponge 63. Coupled with the automatic rotation effect of the water absorption sponge 63, the water absorption sponge 63 is automatically squeezed and drained, so as to ensure that the water absorption sponge 63 in contact with the papermaking net 3 always has a better water absorption effect.

[0024] The rotation of the sponge roller 62 is realized by the driving mechanism 4. A secondary sprocket 45 is fixedly sleeved on the same side end of any one of the support rollers 2 and the transmission shaft 67. A secondary chain 46 is arranged in a matching manner on the secondary sprocket 45. Through the secondary chain 46, one of the transmission shafts 67 can rotate synchronously following the transmission of the papermaking net 3. And transmission sprockets 47 are fixedly sleeved on both transmission shafts 67. A transmission chain 48 is arranged in a matching manner on the transmission sprocket 47. Through the transmission chain 48, the synchronous rotation between adjacent two transmission sprockets 47 can be realized, thereby driving the two eccentric wheels 68 to rotate synchronously, pushing the extrusion water filtering plate 64 to move up and down to squeeze and drain the water absorption sponge 63. The transmission of the papermaking net 3 and the extrusion and drainage of the water absorption sponge 63 are realized by one motor, so that the auxiliary dehydration mechanism 6 can be started and stopped synchronously following the work of the papermaking net 3, which is convenient for control and operation.

[0025] From Figure 5 It can be seen that a drainage hole 610 is opened on one side of the dehydration tank 61. The inner bottom of the dehydration tank 61 is set as an inclined surface to ensure that the water in the dehydration tank 61 can be discharged from the drainage hole 610 in time. And a water guide strip 69 located below the drainage hole 610 is arranged on the drainage side of the dehydration tank 61 to guide the water through the water guide strip 69.

[0026] A tensioning mechanism 45 for adjusting the tension of the driving main chain 42 is installed on the outer side of the wire frame 1. Through the tensioning mechanism 45, the tension of the driving main chain 42 can be regulated to ensure that the driving main chain 42 is in an efficient transmission state.

[0027] During specific use, for the special forming wire of household paper of the present utility model, when forming household paper in papermaking, the main motor 43 starts, drives the papermaking wire 3 to rotate circularly on the wire frame 1 through the support roller 2. At the same time, the pulp spraying device evenly sprays pulp onto the papermaking wire 3 on one side of the papermaking wire 3. The papermaking wire 3 carries the pulp and moves forward. When the wire body carrying the pulp rotates to the position of the auxiliary dewatering mechanism 6, the water-absorbing sponge 63 contacts the upper inner end surface of the wire body, and the excess water in the wire body is sucked away by the water-absorbing sponge 63, reducing the water volume carried by the wire body and lightening the load of the wire body. At the same time, when the papermaking wire 3 is driving, it drives the water-absorbing sponge 63 to rotate to change the water-absorbing position through friction. Moreover, when the main chain 42 controls the rotation of the papermaking wire 3, through the transmission cooperation of the auxiliary chain 46 and the transmission chain 48, it drives the eccentric wheel 68 to rotate. During the rotation of the eccentric wheel 68, it pushes the extrusion water filtering plate 64 to move, and cooperates with the elastic force effect of the compression spring 66, so that the extrusion water filtering plate 64 reciprocates up and down. When the extrusion water filtering plate 64 moves upward, it extrudes the water-absorbing sponge 63, and extrudes the water adsorbed in the water-absorbing sponge 63 that rotates into the dewatering tank 61, realizing the automatic extrusion and drainage of the water-absorbing sponge 63, so that the upper half of the water-absorbing sponge 63 can always ensure an efficient water-absorbing effect, thereby assisting the papermaking wire 3 in dewatering and improving the dewatering efficiency of the papermaking wire 3. Embodiment

[0028] On the basis of Embodiment 1, as Figure 3 shown, a tensioning mechanism 7 is arranged below the papermaking wire 3. The tensioning mechanism 7 includes a rotating shaft 71 rotatably sleeved on the column of the forming wire frame body. At both ends of the rotating shaft 71, a rotating rod 72 is fixedly sleeved, and a tensioning pressure roller 73 is rotatably sleeved at the outer end of the rotating rod 72. The tensioning pressure roller 73 is arranged at the lower part of the wire body of the papermaking wire 3 and closely adheres to the lower end surface of the papermaking wire 3. A secondary motor 74 for controlling the rotation of the rotating shaft 71 is installed on the column. The output end of the secondary motor 74 is connected to the end of the rotating shaft 71. A cross bar is welded and fixed on the column of the forming wire frame body. A tensiometer 75 is installed on the cross bar, and the measuring rod of the tensiometer 75 contacts the lower end surface of the papermaking wire 3. Through the tensiometer 75, the tension condition of the papermaking wire 3 can be monitored in real time. When the tension of the papermaking wire 3 needs to be adjusted, the secondary motor 74 controls the rotating shaft 71 to drive the rotating rod 72 to rotate through the rotating shaft 71, and drives the tensioning pressure roller 73 to rotate clockwise or counterclockwise through the rotating rod 72, so as to adjust the tension of the papermaking wire 3, make the papermaking wire 3 tightened or slightly loosened according to the tension condition of the papermaking wire 3, and thus ensure that the papermaking wire 3 is always within the optimal tension range for papermaking.

[0029] The above are only the preferred embodiments of the present utility model, and do not limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A special forming net for household paper, wherein the forming net frame body is composed of a net frame (1) and columns arranged at upper and lower positions, characterized in that: The invention also comprises an auxiliary dewatering mechanism (6) and a tensioning mechanism (7). A plurality of supporting rollers (2) are rotatably mounted at the end points of the grid frame (1). The papermaking net (3) is supported and arranged on the grid frame (1) through the supporting rollers (2) to form a drivable circulating papermaking net body. A driving mechanism (4) is arranged on the outside of the grid frame (1). The driving mechanism (4) comprises a main sprocket (41) fixedly mounted on the end of the supporting roller (2). A main chain (42) is matched and arranged on the main sprocket (41). A main motor (44) for controlling the rotation of the main sprocket (41) is installed on the outside of the grid frame (1). A transverse partition (5) arranged inside the supporting roller (2) is fixed inside the grid frame (1). The auxiliary dewatering mechanism (6) comprises a dewatering box (61) arranged above the transverse partition (5). A plurality of sponge rollers (62) are arranged horizontally above the dewatering box (61). The outer wall of the dewatering box (62) is coated with a layer of absorbent sponge (63), the upper edge of the absorbent sponge (63) can contact the upper inner end surface of the papermaking net (3), the squeezing water filter plate (64) is longitudinally movably installed in the dewatering box (61) through an elastic guide, and the squeezing water filter plate (64) is provided with an arc-shaped squeezing portion matching the position and shape of each absorbent sponge (63), and a transmission shaft (67) is rotatably mounted in the dewatering box (61), one of the supporting rollers (2) and the transmission shaft (67) is fixedly mounted with an auxiliary sprocket (45) on the same side end, and the auxiliary sprocket (45) is matched with an auxiliary chain (46), the supporting roller (2) and the transmission shaft (67) are connected by the auxiliary chain (46), and the transmission shaft (67) is fixedly mounted with an eccentric wheel (68), which is arranged below the squeezing water filter plate (64) and can push the squeezing water filter plate (64) to move.

2. A special forming net for household paper according to claim 1, characterized in that: The tensioning mechanism (7) comprises a rotating shaft (71) rotatably mounted on a column, rotating rods (72) are fixedly mounted on both ends of the rotating shaft (71), and a tensioning roller (73) is rotatably mounted on the outer end of the rotating rod (72), the tensioning roller (73) is arranged at the lower part of the mesh body of the papermaking mesh (3) and is in close contact with the lower end surface of the mesh body, and an auxiliary motor (74) for controlling the rotation of the rotating shaft (71) is installed on the column.

3. The special forming net for household paper according to claim 1, characterized in that: The elastic guide member comprises a plurality of compression springs (66) vertically installed between the squeeze water filter plate (64) and the inner bottom wall of the dehydration box (61); a telescopic rod (65) is vertically installed in the dehydration box (61), and the upper end of the telescopic rod (65) is fixed to the bottom of the squeeze water filter plate (64).

4. The special forming net for household paper according to claim 1, characterized in that: A drainage hole (610) is provided on one side of the dehydration box (61), the inner bottom of the dehydration box (61) is arranged to be an inclined surface, and a water guide bar (69) located below the drainage hole (610) is arranged on the drainage side of the dehydration box (61).

5. The special forming net for household paper according to claim 2, characterized in that: A crossbar is fixed on the column, a tension meter (75) is mounted on the crossbar, and a measuring rod of the tension meter (75) contacts the lower end surface of the papermaking mesh (3).

6. The special forming net for household paper according to claim 1, characterized in that: An auxiliary sprocket (45) for adjusting the tension of the main chain (42) is installed on the outer side of the grid frame (1).

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