CN220901418U - Heating roller - Google Patents

Abstract

The present utility model provides a heating roller comprising: the roller is rotatable around the axis of the roller, a first channel and a second channel which are mutually communicated are arranged in the roller, the first channel and the second channel respectively extend along the axial direction of the roller, the distance between the first channel and the axis of the roller is smaller than the distance between the second channel and the axis of the roller in the radial direction of the roller, and heat conducting liquid is filled in the first channel and the second channel; the first heating rod is arranged in the first channel to heat the heat conducting liquid. According to the heating roller disclosed by the utility model, the first heating rod can be used for heating the heat conduction liquid, and the heat conduction liquid is used for transferring heat into the second channel, so that the outer peripheral surface of the roller is heated, and the outer peripheral surface of the roller has better temperature uniformity. Simultaneously with first heating rod embeds in the roll, can seal the heat conduction liquid in the roll, have occupation of land space less, the expense is low, system pressure is little, leak the advantage that the risk is low.

Description

Heating roller

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a heating roller.

Background

During the lithium battery sheeting process, the material is rolled by a roller, the temperature of the roller surface is usually maintained at a target temperature value between 25 ℃ and 160 ℃. The existing heating roller mainly has two heating modes, one is to directly heat the roller through an electric heating rod, and the other is to heat the roller through an external oil temperature machine. However, the direct heating of the heating rod can lead to poor temperature uniformity of the surface of the roller, and the oil temperature machine has large heating occupation space, high cost, relatively troublesome later maintenance and easy oil leakage to cause large-area pollution.

Disclosure of utility model

The utility model provides a new technical scheme of a heating roller, which at least can solve one of the problems of poor uniform temperature of the roller surface, large occupied space, high cost and easy pollution in the prior art.

The present utility model provides a heating roller comprising: the roller is rotatable around the axis of the roller, a first channel and a second channel which are mutually communicated are arranged in the roller, the first channel and the second channel respectively extend along the axial direction of the roller, the distance between the first channel and the axis of the roller is smaller than the distance between the second channel and the axis of the roller in the radial direction of the roller, and heat conduction liquid is filled in the first channel and the second channel; the first heating rod is arranged in the first channel to heat the heat conduction liquid.

Optionally, the axis of the first channel coincides with the axis of the roll.

Optionally, the number of the second channels is plural, and the plural second channels are arranged along the circumferential direction of the roll.

Optionally, a connecting channel is arranged in the roller, a first end of the connecting channel is communicated with the first channel, a second end of the connecting channel is communicated with the second channel, and the connecting channel extends obliquely relative to the axis of the roller.

Optionally, two connecting channels are arranged between each second channel and the first channel, first ends of the two connecting channels are respectively communicated with the middle part of the first channel, and second ends of the two connecting channels are respectively communicated with two ends of the second channel in one-to-one correspondence.

Optionally, a plurality of installation channels are further arranged in the roller, the installation channels are distributed along the circumferential direction of the roller, and a second heating rod is arranged in each installation channel.

Optionally, the plurality of mounting channels and the plurality of second channels are staggered along the circumferential direction of the roller.

Optionally, the heating roller further includes: the adjustable assembly is arranged in the first channel and seals the first end of the first channel, the first heating rod seals the second end of the first channel, the liquid storage cavity is defined by the adjustable assembly, the first heating rod and the first channel in a matched mode, and the adjustable assembly can move to adjust the volume of the liquid storage cavity.

Optionally, the adjustable assembly includes: the air bag is connected with the inner wall surface of the first channel in a sealing way, and the air bag can expand or contract in the first channel to adjust the volume of the liquid storage cavity.

Optionally, the adjustable assembly includes: the guide piece is arranged at the first end of the first channel and extends along the axial direction of the roller; a piston rod having one end movable along the guide member and the other end extending toward the first heating rod; the piston head is arranged at one end, far away from the guide piece, of the piston rod and is in sealing connection with the inner wall surface of the first channel; the elastic piece is arranged in the first channel in a telescopic mode along the axial direction of the roller, one end of the elastic piece is connected with the piston head, and the other end of the elastic piece is connected with the guide piece.

Optionally, a pressure release channel communicated with the first channel is arranged in the piston rod, and the heating roller further comprises: the pressure relief assembly is arranged in the pressure relief channel and is switchable between a first state and a second state, and is opened under the condition that the pressure relief assembly is in the first state, so that the pressure relief channel is communicated with the outside of the roller, and is closed under the condition that the pressure relief assembly is in the second state.

Optionally, a positioning rod is arranged at one end of the piston rod, which is far away from the piston head.

Optionally, the second channel penetrates the roller and forms a first opening, and the heating roller further comprises: the two end covers are respectively covered at the opening to close the first opening.

Optionally, a third channel is provided in each end cap, the third channel being in communication with an end of the second channel.

Optionally, each of the third channels forms a second opening in an outer surface of the end cap, and the heating roller further includes: the closing piece is detachably arranged on the second opening to close the second opening.

According to the heating roller, the first channel and the second channel which extend along the axial direction of the heating roller are arranged in the roller, the first heating rod is arranged in the first channel which is close to the radial center of the roller, and the second channel which is close to the outer circumferential surface of the roller is communicated with the first channel, so that the first heating rod can be used for heating heat conduction liquid, and the heat conduction liquid is used for transferring heat into the second channel, so that the outer circumferential surface of the roller is heated, and the outer circumferential surface of the roller has better temperature uniformity. In addition, with first heating rod built-in the roll, can seal the heat conduction liquid in the roll, compare with the external oil temperature machine heating roll in the conventional art, the heating roll of this embodiment takes up an area of the space less, and the expense is low, and system pressure is little, and leakage risk is low, and even leakage pollution's scope is also less.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

FIG. 1 is a side view of a heated roller according to one embodiment provided by the present utility model;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of the encircled portion of FIG. 2 at A;

FIG. 4 is an enlarged view of the encircled portion of FIG. 2 at B;

FIG. 5 is an enlarged view of the circled portion at C in FIG. 2;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 7 is an enlarged view of the encircled portion of FIG. 6 at D;

Fig. 8 is a cross-sectional view of a heating roller according to still another embodiment provided by the present utility model.

Reference numerals

A heating roller 100;

A roller 10; an axis a; a first roller body 10a; a second roller body 10b; a first channel 11; a liquid storage chamber 111; a second channel 12; a first opening 121; a connection channel 13; a mounting channel 14; a heat conducting surface 15;

A first heating rod 20;

A second heating rod 30;

An end cap 40; a third channel 41; a second opening 42;

A piston assembly 50; a piston head 51; a flood plug 511; a seal ring 512; wear ring 513; a piston rod 52; a pressure relief channel 521; an elastic member 53; a guide 54; a bushing 541; a dust ring 542;

An air bag 50';

A closure 60;

A positioning rod 70;

A pressure relief assembly 80;

Fool-proof ring 91; a temperature detector 92.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

The heating roller 100 according to the embodiment of the present utility model is specifically described below with reference to the drawings.

As shown in fig. 1 to 8, a heating roller 100 according to an embodiment of the present utility model includes: a roller 10 and a first heating rod 20.

Specifically, the roll 10 is rotatable about its own axis a. The roll 10 is provided therein with a first passage 11 and a second passage 12 which are communicated with each other, the first passage 11 and the second passage 12 extending in the axial direction of the roll 10, respectively. The distance between the first channel 11 and the axis a of the roll 10 is smaller than the distance between the second channel 12 and the axis a of the roll 10 in the radial direction of the roll 10, and the first channel 11 and the second channel 12 are filled with a heat transfer liquid. The first heating rod 20 is disposed in the first channel 11 to heat the heat-conducting liquid.

In other words, the heating roller 100 according to the embodiment of the present utility model is mainly composed of the roll 10 and the first heating rod 20. The roll 10 may be a cylindrical member rotatable about its own axis a, and a part or all of the outer peripheral surface of the roll 10 may be formed as a heat conducting surface 15 for heating the material.

The roll 10 may have a first passage 11 and a second passage 12 parallel to each other therein, and the first passage 11 and the second passage 12 extend in the same direction as the axial direction of the roll 10. The cross section of the first channel 11 or the second channel 12 may be any shape, and is not limited herein. Alternatively, the first channel 11 and the second channel 12 may have circular cross-sections, and the first channel 11 and the second channel 12 may be cylindrical channels, respectively, to facilitate the machining and manufacturing of the roll 10.

The first passage 11 and the second passage 12 may communicate with each other, and the first passage 11 and the second passage 12 may be filled with a heat conductive liquid, and the heat conductive liquid may flow in the first passage 11 and the second passage 12. Optionally, the heat conducting liquid can be oil liquid, the oil liquid has good heat conducting property, and rapid temperature rise can be realized after heating.

The distance between the first passage 11 and the axis a of the roll 10 in the radial direction of the roll 10 may be L1, and the distance between the second passage 12 and the axis a of the roll 10 may be L2. Specifically, L1 may be a distance between a center point of the center of the first passage 11 in the axial direction of the roll 10 and the axis a of the roll 10, and L2 may be a distance between a center point of the center of the second passage 12 in the axial direction of the roll 10 and the axis a of the roll 10.

L1 may be smaller than L2, and the first channel 11 may be brought closer to the radial center of the roll 10 and the second channel 12 away from the radial center of the roll 10. The first heating rod 20 is arranged in the first channel 11, the heat conducting liquid in the first channel 11 can be heated by the first heating rod 20, and the heat conducting liquid has good heat conducting property, so that the heat conducting liquid can transfer the heat released by the first heating rod 20 from the first channel 11 to the second channel 12, and transfer the heat to the heat conducting surface 15 of the roller 10 in the second channel 12, so that the heat conducting surface 15 is heated to the target temperature.

Since the first passage 11 is closer to the radial center of the roll 10, the first heating rod 20 is disposed in the first passage 11, and the first heating rod 20 can be prevented from directly heating the heat conducting surface 15 of the roll 10 to cause uneven temperature at the heat conducting surface 15. Since the second channel 12 is closer to the outer peripheral surface of the roll 10, that is, to the heat conducting surface 15, the heat conducting liquid in the second channel 12 can uniformly heat the heat conducting surface 15, and the uniformity of temperature of the heat conducting surface 15 is maintained.

It should be noted that the number of the first channels 11 may be one or more, and the number of the second channels 12 may be one or more, which is not limited herein. When the number of the first passages 11 is plural, at least one first passage 11 may be provided therein with the first heating rod 20.

Thus, according to the heating roller 100 of the embodiment of the utility model, the first channel 11 and the second channel 12 extending along the axial direction of the heating roller 10 are arranged in the roller 10, the first heating rod 20 is arranged in the first channel 11 close to the radial center of the roller 10, and the second channel 12 close to the outer circumferential surface of the roller 10 is communicated with the first channel 11, so that the first heating rod 20 can be used for heating the heat conduction liquid, the heat conduction liquid can be used for transferring heat into the second channel 12, and the outer circumferential surface of the roller 10 is heated, and the outer circumferential surface of the roller 10 can have better uniform temperature. In addition, the first heating rod 20 is built in the roller 10, and the heat conducting liquid can be packaged in the roller 10, so that compared with the roller 10 heated by an external oil temperature machine in the prior art, the heating roller 100 of the embodiment has the advantages of less occupied space, low cost, low system pressure, low leakage risk and smaller range of even leakage pollution.

In some embodiments, the roll 10 may include a first roll body 10a and two second roll bodies 10b, the two second roll bodies 10b may be disposed at both ends of the first roll body 10a, the first passage 11 may penetrate the first roll body 10a and the two second roll bodies 10b, and the second passage 12 may be disposed at a portion of the first roll body 10a protruding from the second roll body 10b in a radial direction. The diameter of the first roller body 10a may be larger than that of the second roller body 10b, and the outer circumferential surface of the second roller body 10b may be a heat conducting surface 15 for heating the material. The second roll body 10b may be used to mount the roll 10, for example, the roll 10 may be connected to a speed reducer through the second roll body 10b, and the speed reducer may drive the roll 10 to rotate about its own axis a to roll the material.

According to some alternative embodiments, a thermocouple may be built into the center of the first heater rod 20 to prevent the center temperature from becoming too high.

According to one embodiment of the utility model, the axis a of the first channel 11 coincides with the axis a of the roll 10.

That is, the first passage 11 may be a central passage of the roll 10, and thus the influence on the temperature rise of the heat conduction surface 15 when the first heating rod 20 in the first passage 11 is heated is substantially the same, and the temperature unevenness of the heat conduction surface 15 is prevented from occurring, and the temperature uniformity of the heat conduction surface 15 is prevented from being affected.

According to other embodiments of the present utility model, the number of the second passages 12 is plural, and the plural second passages 12 are arranged in the circumferential direction of the roll 10, whereby the outer circumferential surface of the roll 10 can be uniformly heated, and the uniformity of the temperature of the heat conducting surface 15 on the roll 10 can be improved.

Alternatively, the plurality of second channels 12 may be distributed in the roll 10 in a central symmetry, i.e. the distance between two adjacent second channels 12 may be equal, to further improve the temperature uniformity of the heat conducting surface 15 on the roll 10.

In some alternative embodiments, the diameter of the first channel 11 may be larger than the diameter of the second channel 12, so that the volume of the heat-conducting liquid in the second channel 12 is larger than that in any one of the second channels 12, and the contact area between the heat-conducting liquid in the first channel 11 and the first heating rod 20 is increased, which is beneficial to improving the temperature rising speed of the roller 10.

According to some alternative embodiments, the number of second channels 12 may be one, the second channels 12 may have a circular cross section, and the axis a of the circular second channels 12 may coincide with the axis a of the roll 10, whereby the heat conducting surface 15 of the roll 10 may be uniformly heated by the heat conducting liquid in the second channels 12.

In some embodiments of the utility model, a connecting channel 13 is provided in the roll 10, a first end of the connecting channel 13 being in communication with the first channel 11, a second end of the connecting channel 13 being in communication with the second channel 12, the connecting channel 13 extending obliquely with respect to the axis a of the roll 10.

Specifically, the first channel 11 and the second channel 12 may be communicated through the connection channel 13, and the connection channel 13 may be filled with a heat-conducting liquid. The direction of extension of the connecting channel 13 may have an angle other than 90 ° with the axis a of the roll 10, so that the connecting channel 13 is arranged obliquely with respect to the first channel 11 and the second channel 12, respectively, and may better guide the flow of the heat transfer fluid between the first channel 11 and the second channel 12.

According to some alternative embodiments of the present utility model, two connecting channels 13 are disposed between each second channel 12 and the first channel 11, first ends of the two connecting channels 13 are respectively communicated with the middle part of the first channel 11, and second ends of the two connecting channels 13 are respectively communicated with two ends of the second channel 12 in a one-to-one correspondence manner.

Specifically, the number of the second passages 12 may be N, N may be an integer greater than zero, the number of the connection passages 13 may be 2N, and each of the second passages 12 may be connected with two connection passages 13. The number of the first passages 11 may be one, and each of the connection passages 13 may communicate with the first passage 11; the number of first passages 11 may be plural, and each first passage 11 may communicate with one or more connection passages 13.

In the following, a detailed description will be given by taking an example in which two connecting passages 13 communicate one first passage 11 and one second passage 12, and for convenience of description, the two connecting passages 13 may be defined as a first oil passage and a second oil passage.

As shown in fig. 2, the first end of the first oil passage and the first end of the second oil passage may communicate with a middle portion of the first passage 11, and the middle portion of the first passage 11 may be a center of the first passage 11 in the axial direction of the roll 10 and a vicinity thereof. The first end of the first oil passage and the first end of the second oil passage may be spaced apart in the axial direction of the roll 10. The second end of the first oil duct may be communicated with one end of the second channel 12, and the second end of the second oil duct may be communicated with the other end of the second oil duct, so that the height Wen Youye in the middle of the first channel 11 may flow to two ends of the second channel 12 through the corresponding connecting channel 13, and then enter the second channel 12 from two ends of the second channel 12, so that the temperature of the heat conducting surface 15 of the roller 10 is more uniform in the axial direction of the roller 10, the temperature at one end of the roller 10 is prevented from being too high, and the temperature at the other end is too low.

In some embodiments of the present utility model, a plurality of mounting channels 14 are further provided in the roll 10, the plurality of mounting channels 14 being arranged in a circumferential direction of the roll 10, and a second heating rod 30 being provided in each of the mounting channels 14.

Specifically, a plurality of second heating rods 30 may be installed in the roller 10 along the circumferential direction thereof, and the second heating rods 30 may be directly energized to heat the heat conducting surface 15 of the roller 10. Since the direct heating of the roll 10 by the heating rod can cause the surface of the roll 10 to be rapidly warmed up, the roll 10 can be heated by the second heating rod 30 at the initial stage of the heating roll 100 to shorten the warming time required for the heat conduction surface 15 to rise to the target temperature.

The heating method of the heating roller 100 of the present embodiment will be described in detail below.

First heating rod 20 and second heating rod 30 can be started, and first heating rod 20 heats roll 10 through the heat conduction liquid, and heating rate is slower, and second heating rod 30 can directly heat roll 10, and heating rate is faster, can make roll 10's heat conduction face 15 heat up fast, is favorable to improving roll 10 heating effect speed, shortens the heating time.

When the temperature of the heat conduction surface 15 of the roll 10 reaches the target temperature, the second heating rod 30 may stop working, and the temperature of the roll 10 may be maintained by the first heating rod 20 to improve the temperature uniformity of the heat conduction surface 15 of the roll 10.

In some alternative embodiments, more second heater rods 30 may be provided as desired, wherein several heater rods may be provided as redundancy. Since the second heating rod 30 supplies heat only in the temperature rising stage of the roll 10, the temperature uniformity of the roll 10 after the temperature rising can be maintained by the first heating rod 20, and thus the second heating rod 30 can be unevenly arranged in the circumferential direction of the roll 10. When the heating rod is damaged, a new heating rod is replaced, and the bearing seat on one side of the roller 10 is required to be detached for replacement, so that the standby second heating rod 30 can be directly started at the moment, the number of times of detaching the bearing seat of the roller 10 is reduced, the workload is reduced, and the uniformity of precision is ensured.

According to some alternative embodiments of the present utility model, the plurality of mounting channels 14 and the plurality of second channels 12 are staggered along the circumferential direction of the roller 10, so that the mounting channels 14 and the second channels 12 are more uniformly distributed along the circumferential direction of the roller 10, which is beneficial to uniformly heating the heat conducting surface 15 of the roller 10 by the heat conducting liquid and the second heating rod 30, and improves the temperature uniformity of the surface of the roller 10.

According to some embodiments of the present utility model, the heating roller 100 further includes an adjustable component disposed in the first channel 11 and closing a first end of the first channel 11, the first heating rod 20 closing a second end of the first channel 11, the adjustable component, the first heating rod 20 and the first channel 11 cooperatively defining a liquid storage chamber, the adjustable component being movable to adjust a volume of the liquid storage chamber.

Specifically, a first end of the first channel 11 may be closed by an adjustable assembly and a second end of the second channel 12 may be closed by a first heating rod 20. For example, one end of the first heating rod 20 may be hermetically connected to the inner wall surface of the first channel 11, and the other end of the first heating rod 20 may extend toward the adjustable component and be immersed in the heat-conducting liquid.

The adjustable component, the first heating rod 20 and the inner wall surface of the first channel 11 can enclose a liquid storage cavity 111, and the liquid storage cavity 111 is a part of space for containing heat conducting liquid in the first channel 11.

The adjustable component can move in the first channel 11 to adjust the volume of the liquid storage cavity 111, and further absorb the portion of the heat conducting liquid with enlarged volume after heating. When the heat conducting liquid is not heated, the volume of the heat conducting liquid is smaller, and the volume of the liquid storage cavity 111 is smaller under the adjustment of the adjustable component; the volume of the heated heat transfer fluid expands and the pressure increases, so that the volume of the liquid storage cavity 111 increases by the movement of the adjustable component, thereby reducing the pressure of the heat transfer fluid.

According to some alternative embodiments of the present utility model, the adjustable assembly includes a balloon 50', the balloon 50' being sealingly connected to the inner wall surface of the first channel 11, the balloon 50' being expandable or contractible in the first channel 11 to adjust the volume of the reservoir.

Specifically, as shown in fig. 8, the balloon 50 'may occupy a portion of the space at the first end of the first passage 11, and the outer surface of the balloon 50' may form a seal with the inner wall surface of the first passage 11. The balloon 50' is a flexible structure that can be inflated or deflated under external pressure.

When the heat conduction liquid is not heated, the volume of the heat conduction liquid is smaller, the volume of the air bag 50' is expanded, and the volume of the liquid storage cavity 111 can be reduced; the volume of the heated heat transfer fluid expands and the pressure increases, and the increased pressure acts on the bladder 50 'to reduce the volume of the bladder 20', thereby increasing the volume of the reservoir 111 and reducing the pressure of the heat transfer fluid.

The air bag 50' of the embodiment not only can adjust the pressure of the heat conduction liquid in the heating roller 100, but also has the advantages of simple structure, easy manufacture and good sealing property.

In some embodiments, the first end of the first channel 11 may further be covered with a cover, and the air bag 50' may be disposed between the cover and the first heating rod 20, and the cover may limit the air bag 50' at an end of the air bag 50' away from the first heating rod 20.

According to other embodiments of the utility model, an adjustable assembly includes: a guide 54, a piston rod 52, a piston head 51 and an elastic member 53.

A guide 54 is provided at a first end of the first passage 11, the guide 54 extending in the axial direction of the roll 10. One end of the piston rod 52 is movable along the guide 54, and the other end of the piston rod 52 extends toward the first heating rod 20. The piston head 51 is provided at an end of the piston rod 52 remote from the guide 54, and the piston head 51 is hermetically connected to the inner wall surface of the first passage 11. The elastic member 53 is telescopically provided in the first passage 11 in the axial direction of the roll 10, one end of the elastic member 53 is connected to the piston head 51, and the other end of the elastic member 53 is connected to the guide 54.

In other words, the adjustable assembly of the present embodiment may be the piston assembly 50, and the piston assembly 50 may be mainly composed of the guide 54, the piston rod 52, the piston head 51, and the elastic member 53. Wherein the guide 54 may be installed in the first passage 11, and the relative position of the guide 54 and the roll 10 may be fixed. The guide 54 may extend in the axial direction of the roll 10, and a guide passage may be provided in the guide 54, and the guide passage may extend in the axial direction of the roll 10.

One end of the piston rod 52 may extend into the guide channel and be slidable along the guide channel, i.e. the piston rod 52 may be movable in the axial direction of the roll 10. The other end of the piston rod 52 is opposite to the first heater rod 20 and is connected to a piston head 51. The piston rod 52, when moving along the guide 54, can drive the piston head 51 to move along the first channel 11.

The piston head 51 may be sealingly connected to the inner wall of the first passage 11 to close off the first end of the first passage 11. Alternatively, the outer circumferential surface of the piston head 51 may be provided with a flood seal 511, a seal ring 512 and a wear-resistant ring 513, wherein the flood seal 511 is close to the first heating rod 20, the wear-resistant block is far away from the first heating rod 20, and the seal ring 512 is located between the flood seal 511 and the wear-resistant block. A relatively airtight chamber may be formed between the piston head 51 and the end of the first heater rod 20 remote from the piston head 51 and filled with a heat transfer fluid.

The elastic member 53 may be disposed in the first passage 11 and may be retractable in the axial direction of the roll 10, and both ends of the elastic member 53 are connected to the piston rod 52 and the guide member 54, respectively, and the connection may be abutting, or may be clamping, bonding, or the like, which is not limited herein. When the elastic member 53 is compressed, the elastic member 53 may apply an elastic force to the piston head 51 toward the first heating rod 20.

When the temperature of the heat transfer fluid increases, the volume of the heat transfer fluid expands, and the piston head 51 can be pushed open and moved in a direction away from the first heating rod 20, and the inside of the roll 10 is maintained in a normal pressure or low pressure state by the elastic force of the elastic member 53.

The adjustable assembly is arranged as the piston assembly 50, and the pressure inside the heating roller 100 can be kept in a lower state by utilizing the cooperation among the elastic piece piston head 51, the piston rod 52, the elastic piece 53 and the guide piece 54, so that the reliability of the heating roller 100 is improved, and the oil leakage risk is reduced.

In some embodiments, as shown in fig. 5, a bushing 541 and a dust ring 542 are provided between the inner wall surface of the guide passage and the piston rod 52, and the bushing 541 may be located on a side of the dust ring 542 near the piston head 51.

In some alternative embodiments, a pressure relief channel 521 is provided in the piston rod 52 and communicates with the first channel 11, and the heating roller 100 further includes a pressure relief assembly 80, where the pressure relief assembly 80 is provided in the pressure relief channel 521, and the pressure relief assembly 80 is switchable between a first state and a second state. With pressure relief assembly 80 in the first state, pressure relief assembly 80 opens pressure relief passage 521 to allow pressure relief passage 521 to communicate with the outside of roll 10. With pressure relief assembly 80 in the second state, pressure relief assembly 80 closes pressure relief passage 521.

Specifically, the piston rod 52 may have a hollow structure, a pressure relief passage 521 may be provided in the piston rod 52, and the pressure relief assembly 80 may be provided in the pressure relief passage 521. When the pressure of the heat-conducting liquid in the first channel 11 is greater than the preset pressure, the pressure relief assembly 80 may be in the first state, and the pressure relief assembly 80 may open the pressure relief channel 521, so that the heat-conducting liquid flows out of the roller 10 from the hydraulic channel. When the pressure of the heat-conducting liquid in the first channel 11 is not greater than the preset pressure, the pressure relief assembly 80 may be in the second state, and the pressure relief assembly 80 may close the pressure relief channel 521 to prevent the heat-conducting liquid from flowing out. Thus, when the pressure in the roll 10 is too high, the heat-conducting liquid can flow out through the pressure relief channel 521, so that the roll 10 is kept at normal pressure or low pressure.

In some embodiments of the present utility model, a locating bar 70 is provided at the end of the piston rod 52 remote from the piston head 51, the locating bar 70 being movable in synchronism with the piston rod 52 to assist in determining the position of the piston head 51. The free scaling gauge may extend into the first passage 11 before the roll 10 is filled to ensure that the piston head 51 extends into the first passage 11 at a predetermined position.

In addition, the positioning rod 70 can also be designed as a fool-proof design. After the injection is completed, the positioning rod 70 can be removed when the roll 10 is connected with the speed reducer. When the positioning rod 70 is not removed, the speed reducer cannot be connected with the roller 10, so that the heat conduction liquid is filled in the roller 10 during rolling operation.

In other embodiments, a temperature detector 92 may be provided on the roll 10 adjacent the thermally conductive surface 15 for detecting the temperature of the thermally conductive surface 15. For example, as shown in FIG. 1, a temperature detector 92 may be provided at an end of the first roller body 10a and positioned proximate the thermally conductive surface 15.

In some alternative embodiments, the end of the positioning rod 70 remote from the piston rod 52 may be provided with a foolproof ring 91.

According to other embodiments of the present utility model, the second channel 12 extends through the roll 10 and forms a first opening 121, and the heated roll 100 further includes two end caps 40. Two end caps 40 are respectively provided at the openings to close the first opening 121.

Specifically, two ends of the second channel 12 may respectively penetrate through the roller 10, and a first opening 121 is formed on the outer surface of the roller 10, and an end cap 40 may be provided at each first opening 121 to close the first opening 121, so as to prevent the heat-conducting liquid in the roller 10 from flowing out.

In some embodiments, the second channel 12 may be provided to the first roll body 10a, and the second channel 12 may be located at an outer circumferential side of the second roll body 10b in a radial direction of the roll 10. The second passage 12 may form a first opening 121 through both end surfaces of the first roller body 10 a. The end caps 40 may be annular caps, and the two end caps 40 may be respectively sleeved on the two second roller bodies 10b and respectively connected with two end surfaces of the first roller body 10 a.

In some embodiments of the present utility model, a third channel 41 is provided in each of the end caps 40, and the third channel 41 communicates with the end of the second channel 12, whereby the heat-conductive liquid can flow into the end caps 40 through the third channel 41, and heat the end caps 40 to raise the temperature of both ends of the heating roller 100. Alternatively, the third channels 41 may be connected in series with each of the second channels 12, so that the ends of the plurality of second channels 12 may communicate with each other, which is advantageous for improving the temperature uniformity of the heat conducting surface 15 of the roll 10.

According to some alternative embodiments of the present utility model, each third channel 41 forms a second opening 42 in the outer surface of the end cap 40, and the heating roller 100 further includes a closure 60, the closure 60 being detachably provided to the second opening 42 to close the second opening 42.

Specifically, the outer surface of the end cap 40 may be provided with a second opening 42, the second opening 42 may be in communication with the third channel 41, a closure 60 may be provided at the second opening 42, and the closure 60 may be detachably connected with the end cap 40 to close the second opening 42. Alternatively, the closure 60 may be a bolt.

The second opening 42 in the end cap 40 may serve as a fill port, vent port, or drain port. For example, when pouring liquid into the roll 10, the roll 10 may be placed horizontally, that is, the axial direction of the roll 10 may be extended in the horizontal direction. Two symmetrically distributed second channels 12 and first channels 11 in the roll 10 may be arranged in a vertical direction. The two second openings 42 communicating with the second passage 12 above the first passage 11 may be respectively used as an oil filling port and an air discharging port, and the two openings communicating with the second passage 12 below the first passage 11 may be used as an oil discharging port. Thus, when the oil is injected from the oil injection port, the oil flows downwards under the action of self gravity until the oil is discharged from the oil discharge port, and the gas in the roller 10 is extruded at the same time, so that the gas is discharged upwards from the gas discharge port.

In summary, the heating roller 100 according to the embodiment of the present utility model can heat the heat-conducting liquid by using the first heating rod 20, and transfer the heat into the second channel 12 by using the heat-conducting liquid, so as to heat the outer peripheral surface of the roller 10, so that the outer peripheral surface of the roller 10 has better temperature uniformity. In addition, the first heating rod 20 is built in the roller 10, and the heat conducting liquid can be packaged in the roller 10, so that compared with the roller 10 heated by an external oil temperature machine in the prior art, the heating roller 100 of the embodiment has the advantages of less occupied space, low cost, low system pressure, low leakage risk and smaller range of even leakage pollution.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (15)

1. A heat roller, comprising:

The roller is rotatable around the axis of the roller, a first channel and a second channel which are mutually communicated are arranged in the roller, the first channel and the second channel respectively extend along the axial direction of the roller, the distance between the first channel and the axis of the roller is smaller than the distance between the second channel and the axis of the roller in the radial direction of the roller, and heat conduction liquid is filled in the first channel and the second channel;

the first heating rod is arranged in the first channel to heat the heat conduction liquid.

2. The heated roll of claim 1 wherein the axis of the first channel coincides with the axis of the roll.

3. The heat roller according to claim 1, wherein the number of the second passages is plural, and the plural second passages are arranged in the circumferential direction of the roll.

4. The heated roll of claim 1 wherein a connecting channel is provided in the roll, a first end of the connecting channel being in communication with the first channel and a second end of the connecting channel being in communication with the second channel, the connecting channel extending obliquely relative to the axis of the roll.

5. The heating roller according to claim 4, wherein two connecting channels are arranged between each second channel and the first channel, first ends of the two connecting channels are respectively communicated with the middle part of the first channel, and second ends of the two connecting channels are respectively communicated with two ends of the second channel in a one-to-one correspondence manner.

6. The heating roller according to any one of claims 1 to 5, wherein a plurality of mounting passages are further provided in the roller, the plurality of mounting passages being arranged in a circumferential direction of the roller, and a second heating rod being provided in each of the mounting passages.

7. The heat roller according to claim 6, wherein a plurality of the installation passages and a plurality of the second passages are staggered in the circumferential direction of the roll.

8. The heat roller according to any one of claims 1 to 5, further comprising:

The adjustable assembly is arranged in the first channel and seals the first end of the first channel, the first heating rod seals the second end of the first channel, the liquid storage cavity is defined by the adjustable assembly, the first heating rod and the first channel in a matched mode, and the adjustable assembly can move to adjust the volume of the liquid storage cavity.

9. The heated roll of claim 8 wherein the adjustable assembly comprises:

The air bag is connected with the inner wall surface of the first channel in a sealing way, and the air bag can expand or contract in the first channel to adjust the volume of the liquid storage cavity.

10. The heated roll of claim 8 wherein the adjustable assembly comprises:

The guide piece is arranged at the first end of the first channel and extends along the axial direction of the roller;

A piston rod having one end movable along the guide member and the other end extending toward the first heating rod;

The piston head is arranged at one end, far away from the guide piece, of the piston rod and is in sealing connection with the inner wall surface of the first channel;

The elastic piece is arranged in the first channel in a telescopic mode along the axial direction of the roller, one end of the elastic piece is connected with the piston head, and the other end of the elastic piece is connected with the guide piece.

11. The heat roller of claim 10, wherein a pressure relief passage is provided in the piston rod in communication with the first passage, the heat roller further comprising:

the pressure relief assembly is arranged in the pressure relief channel and can be switched between a first state and a second state,

In the case that the pressure relief assembly is in the first state, the pressure relief assembly opens the pressure relief passage to communicate the pressure relief passage with the outside of the roll,

And under the condition that the pressure relief assembly is in the second state, the pressure relief assembly seals the pressure relief channel.

12. The heated roll of claim 10 wherein an end of the piston rod remote from the piston head is provided with a locating bar.

13. The heated roll of any of claims 1-5 wherein the second passage extends through the roll and forms a first opening, the heated roll further comprising:

the two end covers are respectively covered at the opening to close the first opening.

14. The heat roller of claim 13, wherein a third channel is provided in each end cap, the third channel being in communication with an end of the second channel.

15. The heat roller of claim 14, wherein each of the third channels forms a second opening in an outer surface of the end cap, the heat roller further comprising:

The closing piece is detachably arranged on the second opening to close the second opening.