CN112411247A

CN112411247A - Half-dry calender

Info

Publication number: CN112411247A
Application number: CN202011082152.2A
Authority: CN
Inventors: 李砚丰; 蔡敏; 于全武; 李树光; 朱小江; 吴莉莉
Original assignee: Hangzhou North Star Light Industry Machinery Co ltd
Current assignee: Hangzhou North Star Light Industry Machinery Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-02-26
Anticipated expiration: 2040-10-12
Also published as: CN112411247B

Abstract

The invention discloses a semi-dry calender which comprises a rack, an upper calender roll fixed on the rack, a lower heating roll matched with the upper calender roll, a power device connected with the lower heating roll, a liquid inlet pipe connected with the power device and a liquid outlet pipe connected with the lower heating roll, wherein the upper heating roll is fixed on the rack; the lower heating roller comprises a central shaft, a first sliding block, a second sliding block, a telescopic sleeve and a heating roller body, wherein the first sliding block and the second sliding block can slide on the central shaft, the telescopic sleeve is fixedly connected with the first sliding block and the second sliding block, the heating roller body is fixedly connected with the central shaft, the telescopic sleeve is sleeved outside the central shaft, and the first sliding block, the second sliding block, the heating roller body and the telescopic sleeve are combined to form a liquid storage cavity. The invention has the beneficial effects that: through the distance between first slider and the second slider in the adjustment warming mill, make the stock solution chamber that forms between two sliders change, the heating medium of stock solution intracavity can be to warming mill heating range's regulation down, realization.

Description

Half-dry calender

Technical Field

The invention relates to the technical field of papermaking equipment, in particular to a semi-dry calender.

Background

In the paper industry, it is common that a semi-dry calender is fitted between the dryer groups of a paper or board machine dryer, with the aid of the effect of a metal roll nip, to give a smoother surface and higher tightness to the paper web or to reduce the thickness of the paper or board appropriately. The semi-dry calender generally has 2-3 press rolls, and after the treatment of the semi-dry calender, the tightness of the semi-dry paper web is improved, the surface is smoother, the semi-dry paper web can be more closely contacted with a drying cylinder on the drying cylinder, the heat transfer efficiency is improved, and the smoothness of the paper surface is improved. The heating roller of the existing semi-dry calender is mostly heated integrally, and the heating range is different due to the difference of the paper width. When the calender with the heating roller for heating the whole body presses small-size paper, the heating roller part which is not contacted with the paper is heated by the heating device, so that the energy is wasted.

Disclosure of Invention

The invention provides a semi-dry calender which can adjust the heating range of a calender heating roller according to the paper width, aiming at overcoming the technical defects that the heating range of the heating roller can not be adjusted according to the paper width requirement and the heating roller is heated integrally and wastes energy in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a semi-dry calender comprises a rack, an upper calender roll fixed on the rack, a lower heating roll matched with the upper calender roll, a power device connected with the lower heating roll, a liquid inlet pipe connected with the power device and a liquid outlet pipe connected with the lower heating roll; the lower heating roller comprises a central shaft, a first sliding block, a second sliding block, a telescopic sleeve and a heating roller body, wherein the first sliding block and the second sliding block can slide on the central shaft, the telescopic sleeve is fixedly connected with the first sliding block and the second sliding block, the heating roller body is fixedly connected with the central shaft, the telescopic sleeve is sleeved outside the central shaft, and the first sliding block, the second sliding block, the heating roller body and the telescopic sleeve are combined to form a liquid storage cavity.

Preferably, one end of the central shaft is provided with a liquid inlet guide pipe, the liquid inlet guide pipe is connected with a liquid inlet pipe, the other end of the central shaft is provided with a liquid discharge cavity, the cavity opening part of the liquid discharge cavity is provided with a perforated stop block, and the liquid discharge cavity is connected with a liquid outlet pipe; the trompil dog prevents that flowing back intracavity heat medium from discharging fast, leads to the liquid storage intracavity heat medium heat exchange insufficient.

Preferably, the liquid discharge cavity is uniformly distributed with a plurality of one-way mechanisms, and the first sliding block, the one-way mechanisms and the liquid discharge cavity can be matched to form a passage.

Preferably, the first sliding block is of a circular ring structure, and an L-shaped liquid guide hole is formed in the first sliding block; the L-shaped liquid guide hole can be matched with the one-way mechanism to communicate the liquid storage cavity with the one-way mechanism.

Preferably, the one-way mechanism comprises a plugging block bin, a plugging block is arranged in the plugging block bin, the plugging block can slide up and down in the plugging block bin, a liquid inlet is formed in the upper part of the plugging block bin, the liquid inlet is matched and connected with the L-shaped liquid guide hole, a liquid outlet is formed in the lower end of the plugging block bin, and the liquid outlet is communicated with the liquid discharge cavity; the blocking piece in the one-way mechanism which is not matched with the first sliding block moves upwards to block the liquid inlet so as to prevent the backflow of the heat medium, and the blocking piece in the one-way mechanism which is matched with the first sliding block moves downwards so that the heat medium passes through a loop.

Preferably, the blocking block comprises a circular truncated cone, a hemispherical boss is arranged at the liquid inlet end of the circular truncated cone, the diameter of the hemispherical boss is larger than that of the liquid inlet, a floating rod is arranged at the liquid outlet end of the circular truncated cone, a floating block is arranged at the end part of the floating rod, and an I-shaped liquid discharge hole is formed in the blocking block; the floating rod and the floating block in the one-way mechanism which is not matched with the first sliding block are under the action of buoyancy, the blocking block moves upwards under the action of buoyancy and centrifugal force generated by rotation of the central shaft to block the liquid inlet, the blocking block in the one-way mechanism matched with the first sliding block is thrust generated when the heating medium passes through, the thrust is greater than the sum of the buoyancy and the centrifugal force received by the floating rod and the floating block, the blocking block is pushed away and moves towards the direction of the liquid outlet, and the one-way mechanism forms a passage.

Preferably, the second sliding block is of a circular ring structure, the second sliding block is provided with a connecting hole, and an elastic connecting pipe is fixedly connected with the connecting hole, the length of the elastic connecting pipe can be changed in a telescopic manner, and the elastic connecting pipe is fixedly connected with the liquid inlet conduit; guarantee that heat medium accessible feed liquor pipe and elastic connection pipe enter into the liquid storage intracavity when second slider slides on the center pin.

Preferably, the telescopic sleeve comprises a first sleeve fixedly connected with the first sliding block and a second sleeve fixedly connected with the second sliding block, and the first sleeve and the second sleeve can be movably sleeved.

Preferably, the end part of the guide groove arranged in the inner cavity of the first sleeve is provided with a sealing strip, the end part of the second sleeve is provided with a sliding device, the sliding device is matched and connected with the guide groove, and the side wall of the second sleeve is hermetically connected with the sealing strip; the sealing strip can prevent that the heat medium of stock solution intracavity from entering into flexible in the cover, and slider plays the supporting role, can realize telescopic tube's flexible smooth and easy nature simultaneously.

Preferably, the side walls of the left end and the right end in the heating roller body are provided with telescopic cylinders, and the telescopic cylinders are fixedly connected with the first sliding block and the second sliding block respectively; the telescopic cylinder realizes the sliding control of the first sliding block and the second sliding block, ensures the accurate matching of the first sliding block and the one-way mechanism and realizes the adjustment of the heating range of the lower heating roller.

The invention has the beneficial effects that:

according to the invention, the heating medium in the liquid storage cavity exchanges heat with the lower heating roller body to heat the lower heating roller, and the volume of the liquid storage cavity formed between the two sliders is changed by adjusting the distance between the first slider and the second slider in the heating roller, so that the heating range of the heating roller is adjusted. When the first sliding block is matched with the one-way mechanism, the liquid storage cavity, the liquid discharge cavity and the heating device can form a passage through the connecting pipe, and the temperature stability of the heating roller is ensured. The one-way mechanism which is not matched with the first sliding block is in a closed state during rotation, and the liquid storage cavity and the liquid discharge cavity are guaranteed to have sufficient sealing performance respectively. Through the regulation to warming mill heating range, realize the calendering operation to different width papers, avoided heating mill global heating, the energy saving.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an overall cross-sectional view of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2 according to the present invention;

fig. 4 is an enlarged view of fig. 2 at B in the present invention.

In the drawings, there is shown in the drawings,

1. a frame;

2. an upper calender roll;

3. the heating roller comprises a lower heating roller body, a central shaft, a first sliding block, a second sliding block, a flexible connecting pipe, a liquid inlet guide pipe, a liquid guide pipe, an L-shaped liquid guide hole, a liquid discharge cavity, a 308 one-way mechanism, a hole opening stop block, a heating roller body, a liquid storage cavity, a telescopic cylinder, a connecting hole and a telescopic sleeve, wherein the heating roller body comprises a lower heating roller body 301, a central shaft;

3081. the device comprises a blocking block bin, 3082 blocking blocks, 3083 liquid inlets, 3084 liquid outlets, 3085 round platforms, 3086 semi-sphere bosses, 3087 floating rods, 3088 floating blocks and 3089I-type liquid discharge holes;

3141. the sealing strip mounting structure comprises a first sleeve, a second sleeve, a first sleeve 3142, a second sleeve 3143, a guide groove, a second sleeve 3144, a sliding device 3145, a guide ball 3146, a mounting block 3147, a relief groove 3148, a sealing strip 3149 and a sealing strip mounting groove;

4. the power device comprises a power device, 401, a power motor, 402, a power gear and 403, a connecting shaft gear;

5. a liquid inlet pipe;

6. a liquid outlet pipe.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In addition, in the present patent, the terms "upper", "lower", "left" and "right" are used in reference to the sectional view of fig. 2, and the terms "first", "second", and the like are used to define the components, but the terms are not intended to limit the scope of the present application, since the terms are not intended to limit the components, unless otherwise stated.

Example 1:

as shown in fig. 1 and 2, a semi-dry calender includes a frame 1, an upper calender roll 2 fixed on the frame 1, a lower heating roll 3 matched with the upper calender roll 2, a power unit 4 connected with the lower heating roll 3, a liquid inlet pipe 5 connected to the power unit 4, and a liquid outlet pipe 6 connected with the lower heating roll 3; the lower heating roller 3 comprises a central shaft 301, a first slider 302 and a second slider 303 which can slide on the central shaft 301, an expansion sleeve 314 fixedly connected with the first slider 302 and the second slider 303, and a heating roller body 310 fixedly connected with the central shaft 301, wherein the expansion sleeve 314 is sleeved outside the central shaft 301, two ends of the expansion sleeve are respectively fixedly connected with the first slider 302 and the second slider 303, the first slider 302, the second slider 303, the heating roller body 310 and the central shaft 301 are combined to form a liquid storage cavity 311, and a heating medium is stored in the liquid storage cavity 311, wherein the heating medium can be a flowable heat transfer medium such as heating oil, water and the like.

As shown in fig. 2, one end of a central shaft 301 is provided with a liquid inlet conduit 305, the liquid inlet conduit 305 is connected with a liquid inlet pipe 5, the other end of the central shaft 301 is provided with a liquid outlet cavity 307, an opening stopper 309 is arranged at the opening of the liquid outlet cavity 307, the opening stopper 309 is a circular ring-shaped structure block, a height difference is formed between a central circular hole of the opening stopper 309 and the lower end of the inner wall of the liquid outlet cavity 307, and the opening stopper 309 can prevent the heat medium in the liquid outlet cavity 307 from being discharged rapidly, so that the heat exchange between the heat medium in the liquid. The liquid discharge cavity 307 is connected with the liquid outlet pipe 6. A plurality of one-way mechanisms 308 are uniformly distributed on the outer wall of the liquid discharge cavity 307, and the first sliding block 302, the one-way mechanisms 308 and the liquid discharge cavity 307 are matched to form a passage. First slider 302 is the ring shape structure part of suit on center pin 301, and first slider 302 can slide on center pin 301 from left to right, sets up L type drain hole 306 in the first slider 302, and the hot medium inlet of L type drain hole 306 sets up inside stock solution chamber 311, is higher than telescopic tube 314 outer wall, guarantees that the hot medium in stock solution chamber 311 can be smoothly from L type drain hole entering unidirectional mechanism 308.

As shown in fig. 3, the one-way structure 308 includes a plugging chamber 3081, a plugging block 3082 is disposed in the plugging chamber 3081, the plugging block 3082 can slide up and down in the plugging chamber 3081, a liquid inlet 3083 is disposed at the upper portion of the plugging chamber 3081, the upper end of the liquid inlet 3083 is in fit communication with the L-shaped liquid guide hole 306, a liquid outlet 3084 is disposed at the lower end of the plugging chamber 3081, and the liquid outlet 3084 is in communication with the liquid discharge cavity 307. The stop 3082 includes a rounded platform 3085. A hemisphere boss 3086 is arranged at the center of the liquid inlet 3083 end of the round platform 3085, the hemisphere boss 3086 is hemispherical, the diameter of the hemisphere boss 3086 is larger than that of the liquid inlet 3083, and the hemisphere boss 3086 can block the liquid inlet 3083 to prevent the backflow of the heating medium. A floating rod 3087 is arranged on the end surface of a liquid outlet 3084 of the round platform 3085, and a floating block 3088 is arranged at the lower end of the floating rod 3087. The block 3082 is internally provided with an I-shaped liquid discharge hole 3089 and an I-shaped liquid discharge hole 3089. Penetrates through the hemispherical boss 3086, the circular boss 3085 and the floating rod 3087. When the first sliding block 302 is matched with a certain one-way mechanism 308, the L-shaped liquid guide hole 306 is matched and communicated with the liquid inlet 3083, the blocking piece 3082 in the one-way mechanism 308 moves towards the liquid outlet 3084 under the pushing action of the flowing heat medium, the pushing force generated by the flowing heat medium is larger than the buoyancy and centrifugal force applied to the floating rod 3087 and the floating piece 3088, the blocking piece 3082 moves to the bottom of the blocking piece bin 3081, the lower end of the I-shaped liquid guide hole 3087 extends into the liquid discharge cavity, the heat medium enters and fills the blocking piece bin 3081 through the liquid inlet 3083, then is discharged through the I-shaped liquid guide hole 3087, enters the liquid discharge cavity 307, and finally returns to a heating device (not shown) through the liquid outlet pipe 6 to form a loop. In the one-way mechanism 308 which is not matched with the first slider 302, because the floating rod 3087 and the floating block 3088 arranged at the lower end of the blocking block 3082 are immersed in the heating medium in the liquid discharge cavity 307, under the action of the centrifugal force and the buoyancy provided by the heating medium, the blocking block 3082 moves towards the liquid inlet 3083, the floating block 3088 blocks the liquid outlet 3084, the hemispherical boss 3086 blocks the liquid inlet 3083 to prevent the heating medium from flowing back, and the independent tightness of the liquid storage cavity 311 and the liquid discharge cavity 307 is ensured. The second slider 303 is a circular ring structure part sleeved on the central shaft 301, the second slider 303 is provided with a connecting hole 313, an elastic connecting pipe 304 is fixedly connected with the connecting hole 313, the elastic connecting pipe 304 has a telescopic function, the length change of the elastic connecting pipe 304 can be realized, and the elastic connecting pipe 304 is fixedly connected with the liquid inlet conduit 305.

As shown in fig. 4, the telescopic sleeve 314 includes a first sleeve 3141 and a second sleeve 3142 matched with the first sleeve 3141, a guide groove 3143 is provided in an inner cavity of the first sleeve 3141, a sealing strip installation groove 3149 is provided at an opening end of the first sleeve 3141, a sealing strip 3148 is provided in the sealing strip installation groove 3149, and a fixed end of the first sleeve 3141 is fixedly connected with the first slider 302. The fixed end of the second sleeve 3142 is fixedly connected with the second sliding block 303, the moving end of the second sleeve 3142 is provided with a sliding block 3144, two ends of the sliding block 3144 are provided with abdicating grooves 3147, installation blocks 3146 are arranged in the abdicating grooves 3147, guide balls 3145 are assembled in the installation blocks 3146, the guide balls 3145 are connected with the guide grooves 3143 in a matching manner, the guide balls 3145 can roll in the guide grooves 3143, and meanwhile, the guide balls 3145 provide a supporting effect, so that the telescopic motion resistance of the first sleeve 3141 and the second sleeve 3142 is reduced, and the movement is convenient. The sealing strip 3148 is fitted to the second sleeve 3142 to ensure the sealing property when they are in contact with each other, and to prevent the heating medium from entering the telescopic sleeve 314.

As shown in fig. 2, telescopic cylinders 312 are provided at both left and right ends inside the heating roller body 310, and the telescopic cylinders 312 are fixedly connected to the first slider 302 and the second slider 303, respectively. The telescopic cylinder 312 can drive the first slider 302 and the second slider 303 to move left and right along the axial direction of the central shaft 301, so that the size of the liquid storage cavity 311 can be changed along with the movement of the sliders, the heating range of the lower heating roller 3 can be adjusted, and the telescopic sleeve 314 can perform telescopic motion to match with the change of the size of the liquid storage cavity 311.

As shown in fig. 1 and 2, the power device 4 includes a power motor 401, a power gear 402 fixedly connected to the power motor 401, and a coupling gear 403 matched with the power gear 402, the coupling gear 403 is a hollow structure, one end of the coupling gear 403 is fixedly connected to the central shaft 301, and the hollow structure of the coupling gear 403 is fixedly connected to the liquid inlet pipe hole 312 of the central shaft 301 and the other end of the coupling gear 403 is fixedly connected to the liquid inlet pipe 5.

When the semi-dry calender works, the telescopic cylinder 314 is adjusted according to the width requirement of paper, the telescopic cylinder 314 drives the first slider 302 and the second slider 303 to move, the first slider 302 moves to a specified position, the L-shaped liquid guide hole 306 aligns to the liquid inlet 3083 of the one-way device 308, the matching action of the first slider 302 and the one-way mechanism 308 is completed, and the heating width of the lower heating roller meets the paper width requirement. The power motor 401 is started, and the lower heating roller 3 is driven to rotate through tooth transmission. Meanwhile, heating media are injected into the liquid storage cavity 311 by a heating device (not shown) through the liquid inlet pipe 5, the liquid inlet guide pipe 305 and the elastic connecting pipe 304, and the heating media exchange heat in the liquid storage cavity 311 to achieve the effect of feeding and heating the paper. The heat medium which completes the heat exchange passes through the L-shaped liquid guide hole 306, flows through the one-way device 308, enters the liquid discharge cavity 307, and returns to the heating equipment (not shown) through the liquid outlet pipe 6 to form a loop, so that the heating temperature of the lower heating roller is stable and the efficiency is high.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A semi-dry calender is characterized by comprising a rack (1), an upper calender roll (2) fixed on the rack (1), a lower heating roll (3) matched with the upper calender roll (2), a power device (4) connected with the lower heating roll (3), a liquid inlet pipe (5) connected with the power device (4) and a liquid outlet pipe (6) connected with the lower heating roll (3); the lower heating roller (3) comprises a central shaft (301), a first slider (302) and a second slider (303) which can slide on the central shaft (301), a telescopic sleeve (314) fixedly connected with the first slider (302) and the second slider (303) and a heating roller body (310) fixedly connected with the central shaft (301), the telescopic sleeve (314) is sleeved outside the central shaft (301), and the first slider (302), the second slider (303), the heating roller body (310) and the telescopic sleeve (314) are combined to form a liquid storage cavity (311).

2. The semi-dry calender according to claim 1, wherein one end of the central shaft (301) is provided with a liquid inlet conduit (305), the liquid inlet conduit (305) is connected with the liquid inlet pipe (5), the other end of the central shaft (301) is provided with a liquid outlet cavity (307), the opening part of the liquid outlet cavity (307) is provided with a perforated stop block (309), and the liquid outlet cavity (307) is connected with the liquid outlet pipe (6).

3. A semi-dry calender according to claim 2, characterised in that the drainage chamber (307) is evenly distributed with a plurality of one-way mechanisms (308), and the first slide block (302), the one-way mechanisms (308) and the drainage chamber (307) cooperate to form a passage.

4. A semi-dry calender according to claim 1, characterised in that the first slide block (302) is a circular ring structure fitted around the central shaft (301), and L-shaped liquid guiding holes (306) are provided in the first slide block (302).

5. The semi-dry calender according to claim 2, 3 or 4, characterised in that the one-way mechanism (308) comprises a block bin (3081), a block (3082) is arranged in the block bin (3081), the block (3082) can slide up and down in the block bin (3081), a liquid inlet (3083) is arranged at the upper part of the block bin (3081), the liquid inlet (3083) is connected with the L-shaped liquid guide hole (306) in a matching manner, a liquid outlet (3084) is arranged at the lower end of the block bin (3081), and the liquid outlet (3084) is communicated with the liquid discharge cavity (307).

6. The semi-dry calender according to claim 5, characterized in that the block (3082) comprises a round table (3085), a hemispherical boss (3086) is arranged on the liquid inlet (3083) end round table (3085), the diameter of the hemispherical boss (3086) is larger than that of the liquid inlet (3083), a floating rod (3087) is arranged on the liquid outlet (3084) end round table (3085), a floating block (3088) is arranged at the end part of the floating rod (3087), and an I-shaped liquid discharge hole (3089) is arranged in the block (3082).

7. A semi-dry calender according to claim 1, characterised in that the second slide block (303) is of a ring structure, the second slide block (303) is provided with a connecting hole (313), the connecting hole (313) is fixedly connected with an elastic connecting pipe (304), and the elastic connecting pipe (304) is fixedly connected with the liquid inlet duct (305).

8. A semi-dry calender as claimed in claim 1, characterised in that the telescopic tube (314) comprises a first tube (3141) fixedly connected to the first slider (302) and a second tube (3142) fixedly connected to the second slider (303), and the first tube (3141) and the second tube (3142) are movably sleeved.

9. A semi-dry calender as claimed in claim 8, characterised in that the end of the first sleeve (3141) provided with the guide groove (3143) is provided with a sealing strip (3148), the end of the second sleeve (3142) is provided with a sliding means (3144), the sliding means (3144) is in fit connection with the guide groove (3143), and the side wall of the second sleeve (3142) is in sealing connection with the sealing strip (3148).

10. The semi-dry calender according to claim 1, wherein the telescopic cylinders (312) are provided on the inner walls of the left and right ends of the inside of the heating roller body (310), and the telescopic cylinders (312) are respectively fixedly connected with the first slider (302) and the second slider (303).