Water vapor working system of corrugated roller

Abstract

The invention relates to a water vapor working system of a corrugating roller, and relates to the technical field of corrugated paper production, the water vapor working system comprises a corrugating roller, an input pipe and an output pipe, the input pipe and the output pipe are rotatably connected with the corrugating roller, the output pipe is provided with a vapor outlet, a water cavity and an annular heat exchange cavity are arranged in the corrugating roller, and a coil pipe is fixed in the water cavity; the heat exchange cavity is communicated with a connecting pipe through a one-way valve, the connecting pipe is communicated to the inlet end of a coil pipe, and the outlet end of the coil pipe is communicated with a steam outlet. A water conveying pipe is communicated between the water cavity and the heat exchange cavity, and a two-way pump is installed on the water conveying pipe. A heating mode of steam first and then water is adopted, the surface layer of the corrugated roller is directly heated through steam at the initial stage of operation, and the corrugated roller can quickly enter a heating working state; and in the stage of heating with water, the stage lasts for a long time, the equipment continuously works without shutdown, and due to the advantage that the specific heat capacity of liquid water is large, the influence of steam temperature fluctuation or transient stop on the corrugated roller is avoided, and stable production is facilitated.

Description

Technical Field

[0001] This application relates to the field of corrugated paper production technology, and in particular to a water vapor working system for corrugating rollers. Background Technology

[0002] Corrugated paper is a sheet-like material made by bonding flat paper and corrugated paper. The corrugated paper is processed by a corrugating machine. The corrugating roller is the core component of the corrugating machine, also known as the corrugating roller. The raw paper is rolled into corrugated paper by a pair of corrugating rollers. In order to make the corrugations easier to form, the corrugating rollers need to be heated. Currently, external steam pipes are mostly used to heat the corrugating rollers.

[0003] While steam can achieve a heating effect, using gas as a medium places high demands on the temperature and supply stability of the steam. If the steam temperature fluctuates, the temperature of the corrugated roll will also change accordingly. If the steam supply is interrupted for a short period of time, the temperature of the corrugated roll will drop rapidly. In some factory areas, the steam supply equipment cannot meet the requirements, which is not conducive to stable production. Summary of the Invention

[0004] This application provides a steam-water working system for corrugated rolls, which adopts a heating method of steam first and then water. By taking advantage of the high specific heat capacity of liquid water, the system avoids the impact of steam temperature fluctuations or brief stops on the corrugated rolls, thus facilitating stable production.

[0005] This application provides a water-air working system for corrugating rollers, which adopts the following technical solution: A water-steam working system for corrugated rollers includes a corrugated roller, an input pipe and an output pipe rotatably connected to the corrugated roller, the output pipe having a steam outlet, the corrugated roller having a water cavity and an annular heat exchange cavity inside, the water cavity being located at the center of the corrugated roller, and the heat exchange cavity being located outside the water cavity and close to the outer roller wall of the corrugated roller. A coil is fixed inside the water chamber. The heat exchange chamber is connected to a connecting pipe via a one-way valve. The connecting pipe is connected to the inlet end of the coil. The input pipe is provided with a steam channel one and a steam channel two. Steam channel one is connected to the heat exchange chamber via a solenoid valve one. Steam channel two is connected to the inlet end of the coil via a solenoid valve two. The outlet end of the coil is connected to the steam outlet. A water supply pipe is connected between the water chamber and the heat exchange chamber. A bidirectional pump is installed on the water supply pipe.

[0006] By adopting the above technical solution, when the system first starts working, the bidirectional pump is not running. Solenoid valve two is closed, and solenoid valve one is opened, allowing steam to be introduced into the heat exchange chamber. The steam rapidly heats the outer surface of the corrugated roll, thus heating the paper. After passing through the heat exchange chamber, the steam enters the coil via the connecting pipe. Utilizing the large surface area of ​​the coil, the steam heats the water in the water chamber. The steam, after heat exchange, leaves the output pipe from the steam outlet. Once the water temperature in the water chamber has sufficiently risen, solenoid valve one is closed, and solenoid valve two is opened, stopping the input of steam into the heat exchange chamber. The steam then directly enters the coil through steam channel two. Simultaneously, the bidirectional pump is started, drawing water from the water chamber into the heat exchange chamber via the water supply pipe. This hot water ensures the outer wall temperature of the corrugated roll, achieving the heating effect on the paper.

[0007] Optionally, the input pipe is rotatably connected to the end of the corrugated roller via a rotary joint one. The rotary joint one has two inlets and two outlets, with the two inlets connected to the two outlets respectively. The steam channel one and steam channel two are respectively connected to the two inlets of the rotary joint one, and the two outlets of the rotary joint one are respectively connected to the heat exchange chamber and the coil.

[0008] By adopting the above technical solution, the connection between the two steam input lines can be achieved through a rotary joint, and the joint can be rotated.

[0009] Optionally, the input pipe is rotatably connected to the corrugated roller via bearing one, and the output pipe is rotatably connected to the corrugated roller via bearing two.

[0010] By adopting the above technical solution, the bearings provide rotational support for the corrugated rollers, reducing the stress at each rotating joint.

[0011] Optionally, the outlet end of the coil is rotatably connected to the end of the output pipe via a rotary joint.

[0012] By adopting the above technical solution, the steam output line is connected through the rotating joint two, and it can be rotated.

[0013] Optionally, the water supply pipe includes an inner water pipe and an outer water pipe connected to the bottom of the output pipe. The output pipe has a water channel that connects the inner water pipe and the outer water pipe. The lower end of the inner water pipe is located at the bottom of the water cavity, and the lower end of the outer water pipe is located at the bottom of the heat exchange cavity.

[0014] By adopting the above technical solution, the combination of inner water pipe, water channel and outer water pipe achieves the water flow effect, connecting the inner bottom of the heat exchange chamber and the inner bottom of the water chamber, and the water supply pipe does not rotate with the corrugated roller.

[0015] Optionally, the top of the output pipe is connected to an inner air pipe and an outer air pipe. An air passage is provided inside the output pipe, which connects the inner air pipe and the outer air pipe. The upper end of the inner air pipe is located at the inner top of the water cavity, and the upper end of the outer air pipe is located at the inner top of the heat exchange cavity.

[0016] By adopting the above technical solution, the outer air pipe, air passage and inner air pipe are used to circulate air between the water cavity and the heat exchange cavity to balance the air pressure. Water can also circulate in the outer air pipe, air passage and inner air pipe. The outer air pipe, air passage and inner air pipe do not rotate with the corrugated roller.

[0017] Optionally, a temperature sensor is installed on the outer wall of the inner water pipe.

[0018] By adopting the above technical solution, the water temperature in the water chamber is monitored by a temperature sensor.

[0019] Optionally, a water level sensor is installed at the bottom of the outer wall of the external water pipe.

[0020] By adopting the above technical solution, the water level in the heat exchange chamber is monitored by a water level sensor.

[0021] Optionally, the water chamber and the heat exchange chamber are separated by an insulated tank made of insulating material.

[0022] By adopting the above technical solution, the heat preservation tank is used to reduce the direct heat exchange between the water chamber and the heat exchange chamber, and to avoid the steam temperature dropping too quickly when steam heating is used.

[0023] Optionally, shaft seals are provided between the output pipe and the corrugated roller and the insulation tank for rotational sealing, and the external water pipe and external air pipe are connected to the output pipe between the two shaft seals.

[0024] By adopting the above technical solution, two shaft seals are used to prevent water leakage at the contact points between the output pipe and the corrugated roller and the insulation tank.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The heating method of steam first and then water is adopted. In the initial stage of operation, the surface of the corrugated roll is directly heated by steam, which can quickly enter the heating working state. 2. During the water heating stage, which lasts for a relatively long time, the equipment operates continuously without stopping. By taking advantage of the high specific heat capacity of liquid water, the impact of steam temperature fluctuations or brief shutdowns on the corrugated rolls is avoided, which is conducive to stable production. 3. Electric heating is not used, thus reducing energy consumption. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of a water vapor working system for a corrugating roller according to an embodiment; Figure 2yes Figure 1 A magnified view of a portion of the image; Figure 3 This is a schematic diagram of the fluid state on the outer wall of the steam-heated corrugated roller in the embodiment; Figure 4 This is a schematic diagram of the fluid state on the outer wall of the water-heated corrugated roller in the embodiment.

[0027] Explanation of reference numerals in the attached drawings: 1. Corrugated roller; 2. Input pipe; 3. Output pipe; 31. Steam outlet; 11. Water chamber; 12. Heat exchange chamber; 13. Insulation tank; 21. Bearing 1; 32. Bearing 2; 14. Coil; 15. Check valve; 16. Connecting pipe; 22. Steam passage 1; 23. Steam passage 2; 24. Solenoid valve 1; 25. Solenoid valve 2; 26. Rotary joint 1; 33. Rotary joint 2; 4. Water supply pipe; 41. Two-way pump; 42. Inner water pipe; 43. Outer water pipe; 44. Water channel; 45. Temperature sensor; 46. Water level sensor; 61. Inner air pipe; 62. Outer air pipe; 63. Air channel; 34. Shaft seal. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the accompanying drawings.

[0029] Reference Figure 1 This embodiment discloses a steam-water working system for corrugated rollers, including a corrugated roller 1, an input pipe 2 and an output pipe 3 rotatably connected to the corrugated roller 1. The output pipe 3 has a steam outlet 31. The corrugated roller 1 has a water cavity 11 and an annular heat exchange cavity 12. The water cavity 11 is located at the center of the corrugated roller 1, and the heat exchange cavity 12 is located outside the water cavity 11 and close to the outer roller wall of the corrugated roller 1. The cylindrical outer wall of the corrugated roller 1 has uniformly distributed flutes for forming the wavy shape of the corrugated paper. The water cavity 11 and the heat exchange cavity 12 are separated by an insulated tank 13 made of heat-insulating material to reduce direct heat exchange between the water cavity 11 and the heat exchange cavity 12. The outer wall of the insulated tank 13 is fixed to the inner wall of the corrugated roller 1 by multiple rods. To reduce heat waste at both ends of the corrugated roller 1, the circular plates at both ends of the corrugated roller 1 are also made of heat-insulating material.

[0030] The input pipe 2 and the output pipe 3 are fixed relative to the ground and do not rotate. The input pipe 2 is rotatably connected to the corrugated roller 1 through bearing 21, and the output pipe 3 is rotatably connected to the corrugated roller 1 through bearing 32. The bearings provide rotational support for the corrugated roller 1.

[0031] A coil 14 is fixed inside the water chamber 11. A connecting pipe 16 is connected to the heat exchange chamber 12 via a one-way valve 15. The connecting pipe 16 connects to the inlet end of the coil 14. Through the one-way valve 15, steam in the connecting pipe 16 cannot enter the heat exchange chamber 12. A steam main is connected to the input pipe 2. The steam main branches into two branches that connect to the input pipe 2. The input pipe 2 has a steam channel 1 22 and a steam channel 23. Steam channel 1 22 connects to the heat exchange chamber 12 via a solenoid valve 1 24, and steam channel 23 connects to the inlet end of the coil 14 via a solenoid valve 25. The outlet end of the coil 14 connects to the steam outlet 31. In other words, the outlet end of the connecting pipe 16 and the outlet end of steam channel 23 are both connected to the inlet end of the coil 14 via a three-way connector.

[0032] Specifically, the input pipe 2 is rotatably connected to the end of the corrugated roller 1 via a rotary joint 26. The rotary joint 26 has two inlets and two outlets, with the two inlets connected to the two outlets respectively. Steam passage 22 and steam passage 23 are connected to the two inlets of the rotary joint 26, and the two outlets of the rotary joint 26 are connected to the heat exchange chamber 12 and the coil 14, respectively. The rotary joint 26 is existing technology and is a two-inlet, two-outlet rotary joint, with the two passages not connected to each other. The center of the rotary joint 26 connects to one passage through a through hole and to the other passage through an annular cavity.

[0033] The outlet end of the coil 14 is rotatably connected to the end of the output pipe 3 via a rotary joint 33. The rotary joint 33 is a conventional single-inlet and single-outlet type. The steam after heat exchange leaves the output pipe 3 from the steam outlet 31.

[0034] Reference Figure 1 and Figure 2 A water supply pipe 4 connects the water chamber 11 and the heat exchange chamber 12, and a bidirectional pump 41 is installed on the water supply pipe 4. Specifically, the water supply pipe 4 includes an inner water pipe 42 and an outer water pipe 43 connected to the bottom of the output pipe 3. A water channel 44 is provided inside the output pipe 3, which connects the inner water pipe 42 and the outer water pipe 43. The lower end of the inner water pipe 42 is located at the bottom of the inner water chamber 11, and the lower end of the outer water pipe 43 is located at the bottom of the inner water exchange chamber 12. A temperature sensor 45 is installed on the outer wall of the inner water pipe 42 to monitor the water temperature in the water chamber 11; a water level sensor 46 is installed at the bottom of the outer wall of the outer water pipe 43 to monitor the water level in the heat exchange chamber 12.

[0035] The bidirectional pump 41 is an electric pump installed on the external water pipe 43. The outer surface of the bidirectional pump 41 is waterproofed. The water delivery direction of the bidirectional pump 41 is controlled by personnel. When the bidirectional pump 41 stops working, it is in a shut-off state, in which water cannot flow in the water pipe 4. Depending on the direction of operation when the bidirectional pump 41 starts, it is used to input water from the water chamber 11 into the heat exchange chamber 12, or to input water from the heat exchange chamber 12 into the water chamber 11.

[0036] The top of the output pipe 3 is connected to an inner air pipe 61 and an outer air pipe 62. An air passage 63 is provided inside the output pipe 3, connecting the inner air pipe 61 and the outer air pipe 62. The upper end of the inner air pipe 61 is located at the inner top of the water cavity 11, and the upper end of the outer air pipe 62 is located at the inner top of the heat exchange cavity 12. The outer air pipe 62, air passage 63, and inner air pipe 61 are used to circulate air between the water cavity 11 and the heat exchange cavity 12 to balance the air pressure. Water can also circulate within the outer air pipe 62, air passage 63, and inner air pipe 61.

[0037] Shaft seals 34 are installed between the output pipe 3 and the corrugated roller 1 and the heat preservation tank 13 for rotational sealing. The external water pipe 43 and the external air pipe 62 are connected to the output pipe 3 between the two shaft seals 34. The two shaft seals 34 prevent water leakage at the contact point between the output pipe 3 and the corrugated roller 1 and the heat preservation tank 13.

[0038] The implementation principle of the water-air working system for corrugated rollers according to an embodiment of this application is as follows: During operation, the corrugated roller 1 is driven to rotate by a motor via a belt, which in turn drives the coil 14 and the insulation tank 13 to rotate. The input pipe 2 and output pipe 3 do not rotate, therefore the inner water pipe 42, outer water pipe 43, inner air pipe 61, and outer air pipe 62 also do not rotate. Since the components requiring power do not rotate with the corrugated roller 1, it is convenient to lead out the power lines and signal lines of each component, and the wiring of each electrical component is electrically connected to an external controller for management.

[0039] Reference Figure 3 When the system first starts working, the water temperature in water chamber 11 is too low to be used directly. The two-way pump 41 is not running. Solenoid valve 25 is closed, and solenoid valve 24 is opened, starting to input steam into heat exchange chamber 12. The steam quickly heats the outer surface of the corrugated roll 1, thus heating the paper. After passing through heat exchange chamber 12, the steam enters coil 14 via check valve 15 and connecting pipe 16. Through the large surface area of ​​coil 14, the steam heats the water in water chamber 11. The steam after heat exchange leaves output pipe 3 through steam outlet 31.

[0040] Reference Figure 4The water temperature in the water chamber 11 is monitored by temperature sensor 45. When the usable temperature is reached, solenoid valve 24 is closed and solenoid valve 25 is opened, stopping the input of steam to the heat exchange chamber 12. The steam then enters the coil 14 directly through steam channel 23. Simultaneously, the bidirectional pump 41 is started to pump water from the water chamber 11 to the heat exchange chamber 12. During this process, air in the water chamber 11 and the heat exchange chamber 12 circulates through the outer air pipe 62, air passage 63, and inner air pipe 61, allowing the water to flow smoothly. After the heat exchange chamber 12 is filled with water, the bidirectional pump 41 continues to run, and the water in the heat exchange chamber 12 returns to the water chamber 11 through the outer air pipe 62, air passage 63, and inner air pipe 61, thus forming a circulation and ensuring that the heat exchange chamber 12 is always circulated with hot water. The hot water ensures the outer wall temperature of the corrugated roll 1, achieving a heating effect on the paper. During this process, the steam pressure in the connecting pipe 16 is greater than the water pressure in the heat exchange chamber 12, so water in the heat exchange chamber 12 will not enter the connecting pipe 16.

[0041] After the equipment stops, close solenoid valve 24 and solenoid valve 25. The bidirectional pump 41 will reverse its rotation, pumping the water in the heat exchange chamber 12 back to the water chamber 11. The water level in the heat exchange chamber 12 is monitored by the water level sensor 46. Once the water level reaches the bottom, stop the bidirectional pump 41 to restore the system to its initial state. It should be noted that a small amount of water entering the connecting pipe 16 and the coil 14 will not affect the system operation, as water will naturally be produced during steam condensation.

[0042] In summary, this system employs a steam-first, water-second heating method. In the initial stage of operation, steam directly heats the surface of the corrugated roll 1, enabling rapid entry into the heating state. During the water-heating phase, which lasts longer, the equipment operates continuously without stopping. Utilizing the high specific heat capacity of liquid water, the system avoids the impact of steam temperature fluctuations or brief shutdowns on the corrugated roll 1, thus facilitating stable production. Furthermore, the absence of electric heating reduces energy consumption.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steam-powered working system for corrugated rollers, comprising a corrugated roller (1), an input pipe (2) rotatably connected to the corrugated roller (1), and an output pipe (3), wherein the output pipe (3) is provided with a steam outlet (31), characterized in that: The corrugated roller (1) is provided with a water cavity (11) and an annular heat exchange cavity (12). The water cavity (11) is located at the center of the corrugated roller (1), and the heat exchange cavity (12) is located outside the water cavity (11) and close to the outer roller wall of the corrugated roller (1). A coil (14) is fixed inside the water chamber (11). The heat exchange chamber (12) is connected to a connecting pipe (16) through a one-way valve (15). The connecting pipe (16) is connected to the inlet end of the coil (14). The input pipe (2) is provided with a steam channel one (22) and a steam channel two (23). The steam channel one (22) is connected to the heat exchange chamber (12) through a solenoid valve one (24). The steam channel two (23) is connected to the inlet end of the coil (14) through a solenoid valve two (25). The outlet end of the coil (14) is connected to the steam outlet (31). A water supply pipe (4) is connected between the water chamber (11) and the heat exchange chamber (12). A two-way pump (41) is installed on the water supply pipe (4).

2. The water-air working system for corrugating rollers according to claim 1, characterized in that: The input pipe (2) is rotatably connected to the end of the corrugated roller (1) via a rotating joint (26). The rotating joint (26) has two inlets and two outlets. The two inlets are connected to the two outlets respectively. The steam channel one (22) and the steam channel two (23) are connected to the two inlets of the rotating joint (26) respectively. The two outlets of the rotating joint (26) are connected to the heat exchange chamber (12) and the coil (14) respectively.

3. The water-air working system for corrugating rollers according to claim 1, characterized in that: The input pipe (2) is rotatably connected to the corrugated roller (1) via bearing one (21), and the output pipe (3) is rotatably connected to the corrugated roller (1) via bearing two (32).

4. The water-air working system for corrugating rollers according to claim 1, characterized in that: The outlet end of the coil (14) is rotatably connected to the end of the output pipe (3) via a rotating joint two (33).

5. The water-air working system for corrugating rollers according to claim 1, characterized in that: The water supply pipe (4) includes an inner water pipe (42) and an outer water pipe (43) connected to the bottom of the output pipe (3). The output pipe (3) is provided with a water channel (44) that connects the inner water pipe (42) and the outer water pipe (43). The lower end of the inner water pipe (42) is located at the bottom of the water cavity (11), and the lower end of the outer water pipe (43) is located at the bottom of the heat exchange cavity (12).

6. The water-air working system for corrugating rollers according to claim 5, characterized in that: The top of the output pipe (3) is connected to an inner air pipe (61) and an outer air pipe (62). An air passage (63) is provided inside the output pipe (3). The air passage (63) connects the inner air pipe (61) and the outer air pipe (62). The upper end of the inner air pipe (61) is located at the inner top of the water cavity (11), and the upper end of the outer air pipe (62) is located at the inner top of the heat exchange cavity (12).

7. The water-air working system for corrugating rollers according to claim 5, characterized in that: A temperature sensor (45) is installed on the outer wall of the inner water pipe (42).

8. The water-air working system for corrugating rollers according to claim 5, characterized in that: A water level sensor (46) is installed at the bottom of the outer wall of the external water pipe (43).

9. The water-air working system for corrugating rollers according to claim 1, characterized in that: The water chamber (11) and the heat exchange chamber (12) are separated by an insulated tank (13) made of insulating material.

10. The water-air working system for corrugating rollers according to claim 9, characterized in that: Shaft seals (34) are respectively installed between the output pipe (3) and the corrugated roller (1) and the heat preservation tank (13) for rotational sealing. The external water pipe (43) and the external air pipe (62) are connected to the output pipe (3) between the two shaft seals (34).

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