Heat exchange roller with high heat exchange efficiency

Abstract

The invention relates to the technical field of plate surface heating, in particular to a heat exchange roller with high heat exchange efficiency, which comprises a contact cylinder, a sealing plate, an oil inlet and an oil outlet, and further comprises a buffer structure and an oil way dispersion structure, the oil way dispersing structure is arranged between the contact cylinder and the buffering structure and used for evenly distributing heating oil on the inner wall of the contact cylinder. The problems that when an existing oil heat exchange roller is used, the heating efficiency is low, and the temperature difference of the outer side wall of the heat exchange roller is large and unstable are effectively solved. The heat exchange roller adopts the dispersion flow channel composed of the inner cylinder, the boundary plate, the flow guide plate and the through holes, heating oil in the heat exchange roller can be dispersed, the dynamic balance error is smaller when the roller is started or stopped, through the design of the flow channel on the inner side of the contact cylinder, inlet oil and outlet oil are tightly attached to the inner wall of the contact cylinder to exchange heat in a countercurrent mode, and the heat exchange efficiency is improved. The heat transfer efficiency of oil and the contact cylinder is improved, and meanwhile the temperature of the roller wall is more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of plate surface heating, and in particular to a heat exchange roller with high heat exchange efficiency. Background Art

[0002] When processing the surface of the plate, it is necessary to use a heat exchange roller to dry the cleaned plate. At the same time, when some plates are laminated with film layers, it is also necessary to use a heat exchange roller to press the film layer onto the surface of the plate. Since the surface of the heat exchange roller needs to have a certain temperature during drying or pressing, a corresponding heating structure will be set in the heat exchange roller. The existing heat exchange rollers are divided into oil heat exchange rollers, water heat exchange rollers, steam heat exchange rollers, electric heat exchange rollers and electromagnetic induction heat exchange rollers.

[0003] Among them, the oil heat exchange roller is the most commonly used heat exchange roller. The oil heat exchange roller is heated by heat transfer oil. An oil pump for circulation is connected to the outside of the oil heat exchange roller and is connected to the roller through a rotary joint. The existing oil heat exchange roller generally directly uses an internal hollow cavity and injects heat transfer oil that fills at least 1 / 5 of the cavity space into the cavity. When in use, the external heat transfer oil is continuously injected into the cavity and flows out from the other end to realize circulation.

[0004] However, when the existing oil heat exchange roller is not started, the heat transfer oil in the cavity is located below the rotation axis of the heat exchange roller due to the action of gravity. When started, the heat transfer oil is in an eccentric position, which generates a large asymmetric centrifugal force, resulting in a large difference in the roller dynamic balance at the moment of starting or stopping, thereby causing the equipment to shake violently and reducing the service life of the equipment.

[0005] Moreover, the existing oil heat exchange roller will be spread all over the side wall of the inner cylinder under the action of centrifugal force after startup, but only the outermost heat transfer oil will heat the outer wall of the roller, and the heating efficiency is low. When the speed fluctuates, the degree of adhesion between the heat transfer oil and the side wall of the inner cylinder will become thinner or thicker, thereby causing uneven temperature of the outer wall of the roller, which is not conducive to the stability of the adhesion between the film layer and the plate. Summary of the Invention

[0006] In view of the above situation, in order to overcome the defects of the existing technology, the purpose of the present invention is to provide a heat exchange roller with high heat exchange efficiency, which effectively solves the problems of low heating efficiency of the existing oil heat exchange roller during use and large and unstable temperature difference of the outer wall of the heat exchange roller.

[0007] The technical solution provided by the present invention is a heat exchange roller with high heat exchange efficiency, comprising a contact cylinder, a closing plate, an oil inlet, and an oil outlet. The contact cylinder is thin-walled and cylindrical and open on both sides. Two closing plates are provided at the openings of the contact cylinder to seal the interior of the contact cylinder. The closing plates and the contact cylinder form a sealed space for accommodating heating oil. The oil inlet and the oil outlet are both connected to the interior of the contact cylinder for the heating oil to enter and exit.

[0008] It is characterized in that it also includes a buffer structure and an oil circuit dispersion structure, the buffer structure is connected to the oil inlet and the oil outlet for retaining buffer when the heating oil enters or flows out, and the oil circuit dispersion structure is arranged between the contact cylinder and the buffer structure for evenly distributing the heating oil on the inner wall of the contact cylinder;

[0009] The oil circuit dispersion structure includes an inner cylinder, a dispersion flow channel and a through hole. The inner cylinder is arranged inside the contact cylinder to form an annular space with the inner wall of the contact cylinder. The dispersion flow channel is arranged in the annular space formed by the inner cylinder and the inner wall of the contact cylinder to evenly distribute the heating oil on the inner wall of the contact cylinder. The buffer structure is connected to the dispersion flow channel through the through hole to heat the oil in and out of the dispersion flow channel.

[0010] Preferably, there are multiple dispersion flow channels and they are evenly distributed in the annular space along the axial direction of the contact cylinder.

[0011] Preferably, the dispersed flow channel includes a dividing plate and a guide plate, the dividing plate is used to limit the flow range of the heating oil, and the guide plate is used to guide the flow of the heating oil. The guide plate is located between two adjacent dividing plates to form an S-shaped flow space, and the through hole is provided at the end of the flow space and communicates with the flow space.

[0012] Preferably, the thickness of the boundary plate and the guide plate is the same as the height of the annular space.

[0013] Preferably, the buffer structure includes a baffle and a support shaft, the baffle is coaxially arranged inside the inner cylinder and forms a closed space with the closing plate, the support shaft passes through the closing plate and is fixedly connected to the baffle, and the support shaft is provided with an oil inlet or oil outlet for forming a closed space between the inner cylinder and the closing plate.

[0014] Preferably, an auxiliary hole communicating with the oil inlet or the oil outlet is provided at one end of the support shaft inserted into the closing plate.

[0015] Preferably, the through holes are multiple and are arranged obliquely along the flow direction of the heating oil, and the auxiliary holes are multiple and are arranged along the axial direction and radial direction of the support shaft. The auxiliary holes correspond one to one with the through holes along the radial direction of the support shaft.

[0016] Preferably, the outer edge surface of the end portion of the support shaft is provided with an auxiliary annular groove for connecting the heating oil inlet and outlet pipelines.

[0017] Preferably, the end of the support shaft is provided with a clearance groove for accommodating the inlet and outlet pipelines of the heating oil, and a sealing ring is provided in the clearance groove.

[0018] Preferably, the closing plate is provided with a drain hole for forming a closed space between the inner cylinder and the closing plate.

[0019] The beneficial effects of the present invention are:

[0020] The present invention adopts a dispersion flow channel composed of an inner cylinder, a dividing plate, a guide plate and a through hole, which can disperse the heating oil inside the heat exchange roller. On the one hand, it can prevent the heating oil from gathering inside the heat exchange roller when it is not started, thereby avoiding excessive centrifugal force caused by the accumulation of heating oil when the heat exchange roller is started, thereby causing more violent shaking of the equipment, thereby improving the static balance and dynamic balance performance of the roller.

[0021] The internal design of the present invention is an S-shaped reciprocating flow channel design. The inlet and outlet oils are in close contact with the inner wall of the contact cylinder for countercurrent heat exchange, which greatly improves the heat exchange of the oil itself and the heat exchange efficiency with the contact cylinder, while making the roller wall temperature more uniform and stable.

[0022] The present invention adopts a buffer structure provided on both sides of the dispersion flow channel. When in use, the buffer structures on both sides are in a filled state, so that the heating oil will not cause a large impact on the through hole and the auxiliary hole when the heating oil enters and exits the dispersion flow channel, further reducing the service life loss of the equipment. Moreover, during the startup of the equipment, the buffer structure in a filled state can also achieve dynamic balance at both ends of the heat exchange roller, reducing the centrifugal force when the heat exchange roller is started. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the cutaway main structure of the present invention;

[0025] Figure 3 This invention Figure 2 A magnified view of middle A;

[0026] Figure 4 This invention Figure 2 Enlarged view of middle B;

[0027] Figure 5 It is a schematic diagram of the cutaway right side structure of the present invention;

[0028] Figure 6 It is a schematic diagram of the cutaway right side structure of the present invention;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the inner cylinder and the dispersion flow channel in the present invention;

[0030] In the figure, 1-contact cylinder; 2-closing plate; 3-oil inlet; 4-oil outlet; 5-inner cylinder; 6-through hole; 7-dividing plate; 8-guide plate; 9-baffle; 10-support shaft; 11-auxiliary hole; 12-auxiliary ring groove; 13-yield groove; 14-sealing ring; 15-drain hole. DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0032] Refer to the instruction manual Figure 1-7 A heat exchange roller with high heat exchange efficiency, along the radial direction of the heat exchange roller from the outside to the inside are a contact cylinder 1, an oil path dispersion structure and a buffer structure. The outer edge surface of the contact cylinder 1 contacts the material to be heat exchanged. The contact cylinder 1 is a thin-walled cylindrical shape with openings on both sides. The contact cylinder 1 is generally made of a material with high heat exchange performance. The heat of the heating oil is transferred to the contact cylinder 1 to achieve heat exchange treatment of the material to be heat exchanged.

[0033] The oil path dispersion structure is used to evenly distribute the heating oil between the buffer structure and the contact cylinder 1 on the outer edge surface of the contact cylinder 1. Through the even distribution of the heating oil, a small amount of heating oil can be used to heat the contact cylinder 1.

[0034] The oil circuit dispersion structure includes an inner cylinder 5, a dispersion flow channel and a through hole 6. The inner cylinder 5 is used to support the dispersion flow channel. At the same time, an annular space is formed between the outer edge surface of the inner cylinder 5 and the inner edge surface of the contact cylinder 1. The heating oil is concentrated in the annular space to heat the contact cylinder 1, and the heat of the heating oil is transferred to the outer edge surface of the contact cylinder 1, thereby improving the heat conduction efficiency and making the contact cylinder 1 heat up more quickly.

[0035] There are multiple dispersion flow channels that are evenly distributed in the annular space along the axial direction of the contact cylinder 1. Under the action of the multiple dispersion flow channels, the heating oil can flow more quickly through the annular space formed by the inner cylinder 5 and the contact cylinder 1.

[0036] The dispersion flow channel includes a dividing plate 7 and a guide plate 8. The dividing plate 7 is used to limit the flow range of the heating oil, and the guide plate 8 is used to guide the flow of the heating oil. The guide plate 8 is located between two adjacent dividing plates 7 to form an S-shaped flow space. The through hole 6 is provided at the end of the flow space and is connected to the flow space. The heating oil enters the dispersion flow channel through the through hole 6 from the buffer structure. Under the action of the S-shaped flow space, the heating oil can slowly fill the flow space and flow into the buffer structure at the oil outlet end from the through hole 6 at the end of the flow space.

[0037] The thickness of the dividing plate 7 and the guide plate 8 is the same as the height of the annular space. The dispersed flow channel composed of the dividing plate 7 and the guide plate 8 limits the flow of the heating oil in the height direction. At the same time, the two ends of the dividing plate 7 are in contact with the closing plate 2. The two adjacent dividing plates 7 form a closed space under the action of the closing plate 2. The guide plate 8 is used to guide the heating oil between the two adjacent dividing plates 7 so that the heating oil can move along a predetermined trajectory.

[0038] The buffer structure is connected to the oil dispersion structure via the through hole 6. The buffer structure first retains the heating oil flowing in or out of the outside.

[0039] On the one hand, when the external pressure flows in, the buffer structure can avoid the problem of the heating oil retaining for a short time in the oil dispersion structure due to excessive external input pressure. The heating oil will first fill the buffer structure and then flow to the multiple oil dispersion structures. The longer retention time of the heating oil can further improve the heat exchange efficiency of the heat exchange roller and avoid the problem of uneven heat on the outer edge of the roller.

[0040] On the other hand, when the internal heating oil flows, the heat exchange roller is in a rotating state as a whole. At this time, the buffer structure flowing out to the outside is filled with heating oil. During the rotation process, the uneven distribution of heating oil will not cause a large centrifugal force to cause the heat exchange roller to vibrate more violently, causing damage to the equipment.

[0041] The buffer structure includes a baffle 9 and a support shaft 10. The baffle 9 is coaxially arranged inside the inner cylinder 5 and forms a closed space with the closing plate 2. The support shaft 10 passes through the closing plate 2 and is fixedly connected to the baffle 9. The support shaft 10 is provided with an oil inlet 3 or an oil outlet 4 for forming a closed space between the inner cylinder 5 and the closing plate 2. A closed space for accommodating heating oil is formed between the baffle 9, the closing plate 2 and the inner cylinder 5. The heating oil first enters the closed space composed of the baffle 9, the closing plate 2 and the inner cylinder 5 through the oil inlet 3, and then enters the dispersion flow channel through the through hole 6 connected to this closed space, and the heating oil is evenly distributed through the dispersion flow channel.

[0042] An auxiliary hole 11 connected to the oil inlet 3 or the oil outlet 4 is provided at one end of the support shaft 10 inserted into the closing plate 2. The heating oil flows to the auxiliary hole 11 through the oil inlet 3, enters the enclosed space of the buffer structure at the oil inlet end through the auxiliary hole 11, enters the dispersed flow channel through the through hole 6 at one end, enters the enclosed space of the buffer structure at the oil outlet end through the through hole 6 at the other end, flows to the oil outlet hole through the auxiliary hole 11 and circulates to the corresponding oil pump.

[0043] There are multiple through holes 6 and they are arranged at an angle along the flow direction of the heating oil. There are multiple auxiliary holes 11 arranged along the axial direction and radial direction of the support shaft 10. The auxiliary holes 11 correspond one to one with the through holes 6 in the radial direction of the support shaft 10. The multiple through holes 6 are arranged at an angle to enable the heating oil to enter or leave the dispersion flow channel more quickly. Similarly, the auxiliary holes 11 and the through holes 6 are arranged in coordination to enable the heating oil to enter or flow out of the support shaft 10 more conveniently.

[0044] The outer edge surface of the end of the support shaft 10 is provided with an auxiliary ring groove 12 for connecting the heating oil inlet and outlet pipelines. The auxiliary ring groove 12 is used to connect the external heating oil pipeline for input or output. It can be better fixed on the support shaft 10 through the corresponding buckling structure, and the annular setting of the auxiliary ring groove 12 can prevent the pipeline from being interfered with when the heat exchange roller rotates.

[0045] The end of the support shaft 10 is provided with a clearance groove 13 for accommodating the inlet and outlet pipelines of the heating oil. A sealing ring 14 is provided in the clearance groove 13. The inlet and outlet pipelines are inserted into the clearance groove 13 and the sealing ring 14 can increase the sealing performance of the connection.

[0046] The closing plate 2 is provided with a drain hole 15 for the inner cylinder 5 and the closing plate 2 to form a closed space. After the heat exchange roller has been used for a period of time, the inside of the heat exchange roller needs to be cleaned, and the sewage after cleaning is discharged through the drain hole 15.

[0047] When the present invention is used, the oil pump and the pipeline on the oil pump are first connected to the support shaft 10 under the action of the auxiliary ring groove 12, and the pipeline on the oil pump is inserted into the clearance groove 13. Under the action of the sealing ring 14, the pipeline on the oil pump can be tightly fitted with the clearance groove 13 without leakage. The heating oil flows from the oil inlet 3 through the auxiliary hole 11 near the oil inlet 3, the buffer structure near the oil inlet 3, the through hole 6 near the oil inlet 3, the dispersed flow channel, the through hole 6 near the oil outlet 4, the buffer structure near the oil outlet 4 and the auxiliary hole 11 near the oil outlet 4 into the oil outlet 4, and forms a circulation loop through the external pipeline and the oil pump;

[0048] The dividing plate 7 in the dispersed flow channel separates a large amount of heating oil. By separating the heating oil, the outer wall of the heat exchange roller can be heated in a small area. The guide plate 8 in the dispersed flow channel can guide the heating oil in the dispersed flow channel. The guide plate 8 can also achieve uniform flow of the heating oil in the dispersed flow channel, and the problem of incomplete heating of the contact cylinder 1 caused by excessive flow of heating oil due to no obstruction will not occur.

[0049] Compared with the existing method of directly filling the heating oil into the hollow interior of the heat exchange roller, the use of dispersed flow channels and buffer structures on both sides can avoid the problem of excessive centrifugal force caused by uneven distribution of heating oil when the heat exchange roller is started, thereby causing unstable operation of the equipment;

[0050] Furthermore, the use of dispersed flow channels and buffer structures on both sides can reduce the volume of heating oil in the heating roller. Compared with existing heating rollers, the internal heating oil volume can be reduced from 3 cubic meters to 0.055 cubic meters. In addition, the oil weighs approximately 49 kg when cold, which greatly reduces the oil circulation pressure compared to existing oil heat exchange rollers.

[0051] Moreover, a certain amount of oil is stored inside the buffer structures arranged at both ends, so that no eccentric centrifugal force is generated during the rotation of the heat exchange roller, and the heat exchange roller can rotate more stably.

[0052] The present invention adopts a dispersion flow channel composed of an inner cylinder 5, a dividing plate 7, a guide plate 8 and a through hole 6, which can disperse the heating oil inside the heat exchange roller. On the one hand, it can prevent the heating oil from gathering inside the heat exchange roller when it is not started, thereby avoiding excessive centrifugal force caused by the accumulation of heating oil when the heat exchange roller is started, thereby causing more violent shaking of the equipment, thereby improving the static balance and dynamic balance performance of the roller.

[0053] The internal design of the present invention is an S-shaped reciprocating flow channel design. The inlet and outlet oils are in close contact with the inner wall of the contact cylinder for countercurrent heat exchange, which greatly improves the heat exchange of the oil itself and the heat exchange efficiency with the contact cylinder, while making the roller wall temperature more uniform and stable.

[0054] The present invention adopts a buffer structure provided on both sides of the dispersion flow channel. When in use, the buffer structures on both sides are in a filled state, so that the heating oil will not cause a large impact on the through hole 6 and the auxiliary hole 11 when entering and exiting the dispersion flow channel, further reducing the service life loss of the equipment. Moreover, during the startup of the equipment, the buffer structure in a filled state can also achieve dynamic balance at both ends of the heat exchange roller, reducing the centrifugal force when the heat exchange roller is started.

Claims

1. A heat exchange roller with high heat exchange efficiency, comprising a contact cylinder (1), a closing plate (2), an oil inlet (3) and an oil outlet (4), wherein the contact cylinder (1) is in the shape of a thin-walled cylinder and is open on both sides, the closing plates (2) are two and are both arranged at the opening of the contact cylinder (1) for sealing the interior of the contact cylinder (1), the closing plates (2) and the contact cylinder (1) form a closed space for accommodating heating oil, and the oil inlet (3) and the oil outlet (4) are both connected to the interior of the contact cylinder (1) for the heating oil to enter and exit; It is characterized by: It also includes a buffer structure and an oil circuit dispersion structure, wherein the buffer structure is connected to the oil inlet (3) and the oil outlet (4) for retaining a buffer when the heating oil enters or flows out, and the oil circuit dispersion structure is arranged between the contact cylinder (1) and the buffer structure for evenly distributing the heating oil on the inner wall of the contact cylinder (1); The oil circuit dispersion structure comprises an inner cylinder (5), a dispersion flow channel and a through hole (6); the inner cylinder (5) is arranged inside the contact cylinder (1) and forms an annular space with the inner wall of the contact cylinder (1); the dispersion flow channel is arranged in the annular space formed by the inner cylinder (5) and the inner wall of the contact cylinder (1) and is used to evenly distribute the heating oil on the inner wall of the contact cylinder (1); the buffer structure is connected to the dispersion flow channel via the through hole (6) and is used to heat the oil in and out of the dispersion flow channel.

2. A heat exchange roller with high heat exchange efficiency according to claim 1, characterized in that: There are multiple dispersion flow channels, which are evenly distributed in the annular space along the axial direction of the contact cylinder (1).

3. The heat exchange roller with high heat exchange efficiency according to claim 2, characterized in that: The dispersed flow channel includes a boundary plate (7) and a guide plate (8), wherein the boundary plate (7) is used to limit the flow range of the heating oil, and the guide plate (8) is used to guide the flow of the heating oil. The guide plate (8) is located between two adjacent boundary plates (7) to form an S-shaped flow space, and the through hole (6) is provided at the end of the flow space and communicates with the flow space.

4. The heat exchange roller with high heat exchange efficiency according to claim 1, characterized in that: The thickness of the boundary plate (7) and the guide plate (8) is the same as the height of the annular space.

5. The heat exchange roller with high heat exchange efficiency according to claim 4, characterized in that: The buffer structure comprises a baffle (9) and a support shaft (10); the baffle (9) is coaxially arranged inside the inner cylinder (5) and forms a closed space with the closing plate (2); the support shaft (10) passes through the closing plate (2) and is fixedly connected to the baffle (9); and an oil inlet (3) or an oil outlet (4) is provided on the support shaft (10) for forming a closed space between the inner cylinder (5) and the closing plate (2).

6. The heat exchange roller with high heat exchange efficiency according to claim 5, characterized in that: An auxiliary hole (11) communicating with the oil inlet (3) or the oil outlet (4) is provided at one end of the support shaft (10) inserted into the closing plate (2).

7. The heat exchange roller with high heat exchange efficiency according to claim 6, characterized in that: The through holes (6) are multiple and are arranged obliquely along the flow direction of the heating oil. The auxiliary holes (11) are multiple and are arranged along the axial direction of the support shaft (10) and the radial direction of the support shaft (10). The auxiliary holes (11) correspond one to one with the through holes (6) along the radial direction of the support shaft (10).

8. The heat exchange roller with high heat exchange efficiency according to claim 6, characterized in that: An auxiliary annular groove (12) for connecting heating oil inlet and outlet pipelines is provided on the outer edge surface of the end of the support shaft (10).

9. The heat exchange roller with high heat exchange efficiency according to claim 6, characterized in that: The end of the support shaft (10) is provided with a clearance groove (13) for accommodating the heating oil inlet and outlet pipelines, and a sealing ring (14) is provided in the clearance groove (13).

10. The heat exchange roller with high heat exchange efficiency according to claim 6, characterized in that: The closing plate (2) is provided with a sewage discharge hole (15) for forming a closed space between the inner cylinder (5) and the closing plate (2).

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