Constant tension device

Abstract

The utility model provides a constant tension device which comprises a bottom plate and an unwinding roller, fixing plates are fixedly connected to the two sides of the top of the bottom plate, a mounting shaft is rotationally connected between the tops of the opposite sides of the two fixing plates, and the unwinding roller is arranged on the shaft face of the mounting shaft in a sleeved mode. One end of the mounting shaft penetrates through one side of one fixing plate and extends to the other side of one fixing plate, one end of the mounting shaft is sleeved with a connecting wheel, electric lifting rods are fixedly connected to the periphery of one side of the top of the bottom plate, and a lifting seat is fixedly connected among the tops of the four electric lifting rods. Compared with the prior art, the device has the advantages that the height of the speed regulation gear set is adjusted through the four electric lifting rods, the connection relation of the first transmission wheel, the second transmission wheel and the connecting wheel in the device is adjusted, the unwinding constant tension can be rapidly adjusted through the same servo motor, and the operation cost of hollow fiber membrane tension adjusting equipment is effectively saved.

Description

Technical Field

[0001] The utility model relates to a constant tension device, belonging to the field of hollow fiber membrane processing equipment. Background Art

[0002] Polymer hollow fiber membranes are now widely used in various fields such as water purification, reclaimed water reuse, and municipal engineering due to their high flux and low cost. In particular, the lined reinforced hollow fiber membranes introduced in recent years have been widely used due to their unbroken fibers and long service life.

[0003] In the prior art, hollow fiber membranes need to be centrally rolled and packaged for the convenience of later transportation and secondary processing. During the winding process of the hollow fiber membranes, as the winding proceeds, the size of the roll also increases, resulting in the unwinding and transportation speed of the hollow fiber membrane being unable to match the winding speed of the hollow fiber membrane. Therefore, it is necessary to adjust the unwinding speed to adjust the constant tension of the hollow fiber membrane. However, during the constant tension adjustment process, different unwinding speeds require motors with different speeds to drive and adjust, which increases the operating cost of the hollow limit membrane tension adjustment equipment.

[0004] In summary, the utility model provides a constant tension device to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a constant tension device to solve the problem of increased operating costs of tension adjustment proposed in the above background technology.

[0006] The cam is connected with the gear train of the said lifting gear, and the cam is connected with the gear train of the said lifting gear to the said lifting gear of the said lifting gear.

[0007] Furthermore, the unwinding roller is fixedly connected to the mounting shaft, and the connecting wheel is fixedly connected to the mounting shaft.

[0008] Furthermore, the speed regulating gear group includes a driving shaft, a connecting shaft and a transmission shaft, the driving shaft is fixedly connected to the output end of the servo motor, the connecting shaft passes through the tops on both sides of the mounting plate, the transmission shaft is rotatably connected to one side of the mounting plate and is located between the connecting shaft and the driving shaft, one end of the driving shaft passes through the chassis and the mounting plate in sequence and extends to the other side of a fixed plate, one end of the driving shaft is located on the other side of a fixed plate and is rotatably connected to a slider, the rod surface of the driving shaft is located directly below the connecting wheel and is sleeved with a first transmission wheel, and one end of the connecting shaft is located on the top of the connecting wheel and is sleeved with a second transmission wheel.

[0009] Furthermore, the driving shaft is rotatably connected to the chassis, the driving shaft is rotatably connected to the mounting plate, and the sliding block is slidably connected to a fixing plate.

[0010] Furthermore, the second transmission wheel is meshed with the connecting wheel, the tooth pitch on the first transmission wheel matches the gear on the connecting wheel, and the connecting shaft is rotatably connected to the mounting plate.

[0011] Furthermore, the other end of the connecting shaft is sleeved with a driven wheel, the axial surface of the transmission shaft and located at the bottom of the driven wheel is sleeved with a movable wheel, and the axial surface of the driving shaft and located at the bottom of the movable wheel is sleeved with a driving wheel.

[0012] Furthermore, the driven wheel is meshed with the movable wheel, and the movable wheel is meshed with the driving wheel.

[0013] Beneficial effects of the utility model:

[0014] By adjusting the height of the speed regulating gear set through four electric lifting rods and adjusting the connection relationship between the internal first transmission wheel, the second transmission wheel and the connecting wheel, the unwinding constant tension can be quickly adjusted through the same servo motor, effectively saving the operating cost of the hollow fiber membrane tension adjustment equipment.

[0015] By adjusting the height of the first transmission wheel and the second transmission wheel inside the speed regulating gear group, the meshing relationship with the connecting wheel is changed, and the rotation speed of the installation shaft is adjusted by the gear difference. It can be quickly adjusted according to the constant tension requirement in the later stage of fiber membrane winding to prevent the deformation of fiber membrane materials, thereby effectively improving the processing quality of hollow fiber membrane materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0017] Figure 1 This is a schematic structural perspective diagram of a constant tension device of the utility model;

[0018] Figure 2This is a schematic front view of the structure of a constant tension device of the utility model;

[0019] Figure 3 for Figure 3 A schematic side cross-sectional view of the structure of the movable wheel shown;

[0020] Figure 4 for Figure 3 A schematic side sectional view of the structure of the first transmission wheel is shown.

[0021] In the figure: 1. bottom plate; 2. fixed plate; 3. mounting shaft; 4. unwinding roller; 5. connecting wheel; 6. electric lifting rod; 7. lifting seat; 8. mounting plate; 9. speed regulating gear set; 10. chassis; 11. servo motor; 91. driving shaft; 92. connecting shaft; 93. transmission shaft; 94. slider; 95. first transmission wheel; 96. second transmission wheel; 97. driven wheel; 98. movable wheel; 99. driving wheel. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See also Figure 1-4 The utility model provides a technical solution: a constant tension device, including a bottom plate 1 and a reel 4, both sides of the top of the bottom plate 1 are fixedly connected with fixed plates 2, the tops of the two fixed plates 2 on opposite sides are rotatably connected with the mounting shaft 3, the reel 4 is sleeved on the axial surface of the mounting shaft 3, one end of the mounting shaft 3 passes through one side of a fixed plate 2 and extends to the other side of a fixed plate 2, one end of the mounting shaft 3 is sleeved with a connecting wheel 5, the four sides of the top of the bottom plate 1 are fixedly connected with electric lifting rods 6, the tops of the four electric lifting rods 6 are fixedly connected with a lifting seat 7, and the four electric lifting rods 6 are fixedly connected with the lifting seat 7. The movable lifting rods 6 are all connected to an external power supply and are provided with the same power control switch. One side of the top of the lifting seat 7 is fixedly connected to a mounting plate 8, and the other side of the top of the lifting seat 7 is fixedly connected to a chassis 10. The interior of the chassis 10 is fixedly connected to a servo motor 11, and the servo motor 11 is connected to an external power supply and is provided with a power control switch. A speed regulating gear set 9 is installed between the two sides of the mounting plate 8 and between the top and bottom of the connecting wheel 5. The unwinding roller 4 is fixedly connected to the mounting shaft 3, and the connecting wheel 5 is fixedly connected to the mounting shaft 3. The unwinding roller 4 is used to unwind and convey the hollow fiber membrane material.

[0024] See also Figure 2-4The speed regulating gear set 9 includes a driving shaft 91, a connecting shaft 92 and a transmission shaft 93. The driving shaft 91 is fixedly connected to the output end of the servo motor 11. The connecting shaft 92 runs through the tops on both sides of the mounting plate 8. The transmission shaft 93 is rotatably connected to one side of the mounting plate 8 and is located between the connecting shaft 92 and the driving shaft 91. One end of the driving shaft 91 sequentially runs through the chassis 10 and the mounting plate 8 and extends to the other side of a fixed plate 2. One end of the driving shaft 91 is located on the other side of a fixed plate 2 and is rotatably connected with a slider 94. The rod surface of the driving shaft 91 is located directly below the connecting wheel 5 and is sleeved with a first transmission wheel 95. One end of the connecting shaft 92 is located on the top of the connecting wheel 5 and is sleeved with a second transmission wheel 96. The driving shaft 91 is rotatably connected to the chassis 10, the driving shaft 91 is rotatably connected to the mounting plate 8, the slider 94 is slidably connected to a fixed plate 2, the second transmission wheel 96 is meshed with the connecting wheel 5, the tooth pitch on the first transmission wheel 95 matches the gear on the connecting wheel 5, and the connecting shaft 92 is rotatably connected to the mounting plate 8.

[0025] See also Figure 2-4 , the other end of the connecting shaft 92 is sleeved with a driven wheel 97, the axial surface of the transmission shaft 93 and located at the bottom of the driven wheel 97 is sleeved with a movable wheel 98, and the axial surface of the driving shaft 91 and located at the bottom of the movable wheel 98 is sleeved with a driving wheel 99. The diameter of the driven wheel 97 is the same as that of the driving wheel 99, so that the speed of the driving shaft 91 is the same as that of the connecting shaft 92. The driven wheel 97 is meshed with the movable wheel 98, and the movable wheel 98 is meshed with the driving wheel 99, so that the connecting shaft 92 and the driving shaft 91 have the same direction of rotation, so that the first transmission wheel The first transmission wheel 95 and the second transmission wheel 96 have the same direction of rotation, the diameter of the first transmission wheel 95 is larger than that of the second transmission wheel 96, and the diameter of the second transmission wheel 96 is equal to that of the connecting wheel 5. When the connecting shaft 92 drives the second transmission wheel 96 to rotate and the second transmission wheel 96 is meshed with the connecting wheel 5, the rotation speed of the mounting shaft 3 is the same as that of the driving shaft 91. When the first transmission wheel 95 moves up and meshes with the connecting wheel 5, the second transmission wheel 96 is no longer meshed with the connecting wheel 5, so that the rotation speed of the mounting shaft 3 is greater than that of the driving shaft 91, thereby accelerating the unwinding.

[0026] Specific implementation method: By starting the servo motor 11 inside the chassis 10, the driving shaft 91 inside the speed regulating gear set 9 is driven to rotate, the driving shaft 91 drives the driving wheel 99 to rotate, the driving wheel 99 drives the transmission shaft 93 to rotate through the movable wheel 98, and the transmission shaft 93 drives the connecting shaft 92 and the driving shaft 91 to move at the same speed and in the same direction at the same time through the meshing relationship between the movable wheel 98 and the driven wheel 97, thereby driving the first transmission wheel 95 and the second transmission wheel 96 to move at the same speed and in the same direction at the same time. Since the second transmission wheel 96 has the same diameter as the connecting wheel 5, when the connecting shaft 92 rotates, the second transmission wheel 96 can drive the connecting wheel 5 and the mounting shaft 3 to rotate at the same speed, thereby driving the unwinding roller 4 to rotate, and then the hollow fiber membrane material transmitted on the surface of the unwinding roller can be unwound and transmitted at a uniform speed.

[0027] As the size of the winding roller at the other end increases, the rotation speed of the unwinding roller 4 can no longer meet the winding speed of the hollow fiber membrane material. In order to prevent the deformation of the fiber membrane material, the four electric lifting rods 6 are started, and the four electric lifting rods 6 push the lifting seat 7 to move upward, thereby pushing the chassis 10, the servo motor 11 and the speed regulating gear set 9 to move upward as a whole, and then the first transmission wheel 95 can be driven to move upward and mesh with the connecting wheel 5, the second transmission wheel 96 moves upward, and the meshing connection with the connecting wheel 5 is released, and the servo motor 11 is started again, and the output end of the servo motor 11 drives the driving shaft 9 1 rotates, the driving shaft 91 drives the first transmission wheel 95 to rotate. Since the diameter of the first transmission wheel 95 is larger than that of the connecting wheel 5, when the driving shaft 91 drives the installation shaft 3 to rotate through the meshing relationship between the first transmission wheel 95 and the connecting wheel 5, the rotation speed of the installation shaft 3 is greater than the rotation speed of the driving shaft 91, so that the unwinding roller 4 can be accelerated to rotate, and then the winding speed of the hollow limit membrane material can be quickly adjusted according to the constant tension demand of the fiber membrane in the later stage of winding, so as to prevent the deformation of the fiber membrane material and effectively improve the processing quality of the hollow fiber membrane material.

[0028] By adjusting the height of the speed regulating gear set 9 through four electric lifting rods 6 and adjusting the connection relationship between the internal first transmission wheel 95, the second transmission wheel 96 and the connecting wheel 5, the unwinding constant tension can be quickly adjusted through the same servo motor 11, effectively saving the operating cost of the hollow fiber membrane processing equipment.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A constant tension device, comprising a bottom plate (1) and an unwinding roller (4), characterized in that: Both sides of the top of the bottom plate (1) are fixedly connected to fixed plates (2), the tops of the two opposite sides of the two fixed plates (2) are rotatably connected to the mounting shaft (3), the unwinding roller (4) is sleeved on the axial surface of the mounting shaft (3), one end of the mounting shaft (3) passes through one side of a fixed plate (2) and extends to the other side of a fixed plate (2), one end of the mounting shaft (3) is sleeved with a connecting wheel (5), the four sides of the top of the bottom plate (1) are fixedly connected to electric lifting rods (6), a lifting seat (7) is fixedly connected between the tops of the four electric lifting rods (6), one side of the top of the lifting seat (7) is fixedly connected to a mounting plate (8), the other side of the top of the lifting seat (7) is fixedly connected to a chassis (10), the inside of the chassis (10) is fixedly connected to a servo motor (11), and a speed regulating gear set (9) is installed between the two sides of the mounting plate (8) and between the top and the bottom of the connecting wheel (5).

2. A constant tension device according to claim 1, characterized in that: The unwinding roller (4) is fixedly connected to the mounting shaft (3), and the connecting wheel (5) is fixedly connected to the mounting shaft (3).

3. A constant tension device according to claim 1, characterized in that: The speed regulating gear set (9) comprises a driving shaft (91), a connecting shaft (92) and a transmission shaft (93); the driving shaft (91) is fixedly connected to the output end of the servo motor (11); the connecting shaft (92) passes through the tops of both sides of the mounting plate (8); the transmission shaft (93) is rotatably connected to one side of the mounting plate (8) and is located between the connecting shaft (92) and the driving shaft (91); one end of the driving shaft (91) passes through the chassis (10) and the mounting plate (8) in sequence and extends to the other side of a fixed plate (2); one end of the driving shaft (91) is rotatably connected to a slider (94) located at the other side of a fixed plate (2); a first transmission wheel (95) is sleeved on the rod surface of the driving shaft (91) and is located directly below the connecting wheel (5); and a second transmission wheel (96) is sleeved on one end of the connecting shaft (92) and is located at the top of the connecting wheel (5).

4. A constant tension device according to claim 3, characterized in that: The driving shaft (91) is rotatably connected to the chassis (10), the driving shaft (91) is rotatably connected to the mounting plate (8), and the sliding block (94) is slidably connected to a fixing plate (2).

5. A constant tension device according to claim 3, characterized in that: The second transmission wheel (96) meshes with the connecting wheel (5), the tooth pitch on the first transmission wheel (95) matches the gear on the connecting wheel (5), and the connecting shaft (92) is rotatably connected to the mounting plate (8).

6. A constant tension device according to claim 3, characterized in that: The other end of the connecting shaft (92) is sleeved with a driven wheel (97), the axial surface of the transmission shaft (93) and located at the bottom of the driven wheel (97) is sleeved with a movable wheel (98), and the axial surface of the driving shaft (91) and located at the bottom of the movable wheel (98) is sleeved with a driving wheel (99).

7. A constant tension device according to claim 6, characterized in that: The driven wheel (97) is meshed with the movable wheel (98), and the movable wheel (98) is meshed with the driving wheel (99).

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