Spindle frame without tension station

Abstract

The invention belongs to the technical field of linear material tension control equipment, and particularly relates to a tension-station-free spindle frame which comprises a frame body and a spindle disc installed on the frame body. The device further comprises a constant tension mechanism and a tension detection mechanism. The constant tension mechanism is installed on the spindle disc, and the constant tension mechanism is used for controlling the pay-off tension of the steel wire rope. By arranging the constant tension mechanism, tension is applied to the steel wire rope through the gravity of the heavy hammer, on one hand, when the length of the steel wire rope is changed, in the vertical moving process of the heavy hammer, the gravity of the heavy hammer is not changed, and the tension on the steel wire rope is not changed; on the other hand, the heavy hammer is adopted to apply gravity to the steel wire rope, the extension path of the steel wire rope is changed through the heavy hammer, and the steel wire rope with the sufficient length is prepared in the initial state to be used for relieving the difference between the paying-off speed and the wire pulling speed; and therefore, sufficient time is provided for the speed change of the pay-off motor.

Description

Technical Field

[0001] The invention belongs to the technical field of linear material tension control equipment, in particular to a tension-free station spindle frame. Background Art

[0002] In the production process of steel cord rubber conveyor belts, uniform distribution of wire rope tension is crucial to the smooth operation of the conveyor belt. At the same time, the fatigue resistance of the wire rope and its adhesion to rubber also affect the service life of the conveyor belt. Therefore, when producing steel cord rubber conveyor belts, the steel cord conveyor belt production specification stipulates the internal wire rope tension value index when producing conveyor belts of different grades.

[0003] In the old-style wire rope tension control equipment, the tension value of the wire rope is jointly determined by the "spindle rack + tension station", in which the spindle rack is directly connected to the motor, and the motor pulls back the wire rope to provide an initial tension, and then the small oil cylinder inside the tension station presses up to lift the wire rope to reach the final tension value. Since the initial tension of each wire rope is inconsistent, the pressure compensation amplitude of multiple wire ropes is different during the process of the small oil cylinder of the tension station pressurizing and lifting the wire rope to the final tension value, resulting in inconsistent angles between each wire rope and the detection device and large errors in the detection value.

[0004] In order to enhance the stability of wire rope tension adjustment, the related art often solves such problems by using a spindle rack with constant tension output. For example, the related art discloses a spindle tension control device and a spindle rack for maintaining a constant tension of a linear material, and the application number is CN2023106084550. In this scheme, the motor actively matches the pay-off speed of the wire material roll to ensure that the pay-off tension of the wire is basically consistent under different external pay-off tension F conditions, and then the elastic tension detection component connected to the swing arm detects the slight swing change of the wire tension in real time, and the wire tension is fine-tuned and corrected by the elastic tension detection component to achieve a constant tension output of the wire. However, in actual application, it is found that due to the change in the wire drawing rate during the entire production process, when the wire drawing rate changes, the motor speed is adjusted according to the change in the tension value. Although the motor speed is balanced with the wire drawing rate after the adjustment, due to the delay in the adjustment, the tension value of the wire rope fluctuates during the adjustment process, which makes the tension value of the wire rope insufficiently stable during the production process.

[0005] In view of this, the present invention proposes a tension-free station spindle frame to solve the above technical problems. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a tension-free station spindle frame.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the tension-free station spindle frame of the present invention comprises a frame body and a spindle plate installed on the frame body;

[0008] It also includes a constant tension mechanism and a tension detection mechanism;

[0009] The constant tension mechanism is installed on the spindle plate, and is used to control the pay-off tension of the wire rope. The constant tension mechanism includes a central shaft, a pay-off motor, a weight and a pay-off roller;

[0010] The central shaft is rotatably mounted on the spindle plate, the pay-off motor is fixedly mounted on the spindle plate, and the pay-off motor is connected to the central shaft via a reducer;

[0011] The spindle plate is provided with a lifting slot, and the weight is slidably connected to the spindle plate through the lifting slot;

[0012] A pay-off roller is rotatably mounted on the spindle disk. In the initial state, the wire rope extends from the central axis to the weight and the pay-off roller in sequence, and the weight has a tendency to move away from the pay-off roller and the central axis under the action of gravity.

[0013] The tension detection mechanism is installed on the frame, and is located on the extension route of the wire rope. The tension detection mechanism includes a redirecting pulley, a tensioning wheel and a tension detector;

[0014] The tension wheel is installed on the tension detector, and the redirecting pulleys are installed on both sides of the tension wheel. The extension path of the wire rope on the redirecting pulley and the tension wheel is arc-shaped.

[0015] Preferably, a position sensor is installed in the lifting slot, and the position sensor is used to detect the position of the weight in the lifting slot. The position sensor is electrically connected to the wire-releasing motor, and the speed of the wire-releasing motor is adjusted by the position of the weight. In the initial state, the weight is located in the middle of the lifting slot.

[0016] Preferably, the weight includes a connecting seat and a winding rod, the connecting seat is slidably installed in the lifting slot, the winding rod is rotatably installed on the connecting seat, the winding rod is designed in multiple numbers, and a reversing rod is rotatably installed on the spindle disk, the reversing rod is located above the lifting slot, and the wire rope is arranged in a wave shape on the winding rod and the reversing rod.

[0017] Preferably, a counterweight groove is provided on the connecting seat, and the counterweight groove is filled with counterweight beads, and the counterweight beads are used to adjust the gravity of the weight.

[0018] Preferably, a counterweight box is fixedly mounted on the spindle disk, a transfer belt and a driving roller are rotatably mounted inside the counterweight box, the driving roller is externally connected to a rotating motor, the rotating motor is electrically connected to a tension detection mechanism, the transfer belt is sleeved on the driving roller, the transfer belt is provided with evenly distributed adaptation grooves, the adaptation grooves match the counterweight beads, the counterweight box is provided with weight-increasing holes, and the openings of the weight-increasing holes are located directly above the counterweight grooves.

[0019] Preferably, a gravity sensor and a display screen are arranged at the bottom end of the counterweight box, the gravity sensor is used to weigh the weight of the counterweight beads, and the display screen is used to display the total weight of the weight.

[0020] Preferably, a sliding groove is provided on the side wall of the connecting seat, a sealing plate is slidably installed in the sliding groove, the counterweight box is located on the moving path of the sealing plate, a weight reduction hole is provided on the bottom of the counterweight box, and the weight reduction hole is located on the extension path of the migration belt.

[0021] Preferably, both the weight-increasing holes and the weight-reducing holes extend obliquely, and as the distance from the migration zone shortens, the height of the weight-increasing holes gradually increases, while the height of the weight-reducing holes gradually decreases.

[0022] Preferably, the counterweight box is aligned with the top of the lifting slot, a push switch is provided at the top of the lifting slot, and the push switch is electrically connected to the rotating motor for connecting the rotating motor circuit.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. The tension-free station spindle frame described in the present invention, by setting a constant tension mechanism, utilizes the gravity of the weight to apply tension to the wire rope. On the one hand, compared with the use of elastic elements such as springs to provide tension in the related art, when the length of the wire rope changes, the degree of deformation of the elastic element itself changes, thereby causing the elastic strength of the elastic element to change, and the pulling force on the wire rope to change. On the other hand, in the present invention, when the length of the wire rope changes, the gravity of the weight remains unchanged during the up and down movement of the weight, and the pulling force on the wire rope remains unchanged, thereby allowing the wire rope to always maintain a constant tension. On the other hand, the present invention uses a weight to apply gravity to the wire rope, and changes the extension path of the wire rope through the weight. In the initial state, a sufficient length of wire rope is prepared to alleviate the difference between the pay-off rate and the wire pulling rate, thereby providing sufficient time for the pay-off motor rate change. When the wire pulling rate changes, the change in the wire rope tension caused by untimely pay-off can be effectively avoided.

[0025] 2. The tension-free station spindle frame described in the present invention unfolds the wire rope from the central axis and winds it around the winding rod, the reversing rod and the pay-off roller in sequence, causing the wire rope to be wavy between the central axis and the pay-off roller, thereby making the distance between the wire rope and the pay-off roller longer. During the rising process of the weight, the pay-off roller can output a longer wire rope for the same rising distance, thereby providing more time for the adjustment of the pay-off motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is an overall schematic diagram of the present invention;

[0028] Figure 2 yes Figure 1 A partial enlarged view of the middle part;

[0029] Figure 3 It is a stereoscopic diagram of the assembly of the spindle plate and the constant tension mechanism;

[0030] Figure 4 This is a stereoscopic view of the assembly of the spindle plate and the constant tension mechanism from another perspective;

[0031] Figure 5 It is a three-dimensional picture of a heavy hammer;

[0032] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle;

[0033] Figure 7 It is a three-dimensional picture of the weight box;

[0034] Figure 8 is a cross-sectional view of the weight box and the connecting seat;

[0035] Fig. 9 yes Figure 8 A partial enlarged view of point C in the middle;

[0036] In the figure: 1. frame; 11. spindle plate; 2. central axis; 21. pay-off motor; 22. lifting slot; 23. pay-off roller; 24. connecting seat; 25. winding rod; 26. reversing rod; 27. counterweight slot; 3. redirecting pulley; 31. tensioning wheel; 32. tension detector; 4. counterweight box; 41. transfer belt; 42. driving roller; 43. rotating motor; 5. adapter slot; 51. weight-increasing hole; 52. sliding slot; 53. blocking plate; 54. weight-reducing hole; 6. push switch. DETAILED DESCRIPTION

[0037] 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 explained below in conjunction with specific implementation methods.

[0038] like Figures 1 to 9 As shown, the tension-free station spindle frame of the present invention comprises a frame body 1 and a spindle plate 11 installed on the frame body 1;

[0039] It also includes a constant tension mechanism and a tension detection mechanism;

[0040] The constant tension mechanism is installed on the spindle plate 11, and is used to control the pay-off tension of the wire rope. The constant tension mechanism includes a central shaft 2, a pay-off motor 21, a weight and a pay-off roller 23;

[0041] The central shaft 2 is rotatably mounted on the spindle plate 11, and the pay-off motor 21 is fixedly mounted on the spindle plate 11. The pay-off motor 21 is connected to the central shaft 2 via a reducer;

[0042] The spindle plate 11 is provided with a lifting slot 22, and the weight is slidably connected to the spindle plate 11 through the lifting slot 22;

[0043] The spindle plate 11 is rotatably mounted with a pay-off roller 23. In the initial state, the wire rope extends from the central axis 2 to the weight and the pay-off roller 23 in sequence, and the weight has a tendency to move away from the pay-off roller 23 and the central axis 2 under the action of gravity.

[0044] The tension detection mechanism is installed on the frame 1, and is located on the extension route of the wire rope. The tension detection mechanism includes a redirection pulley 3, a tensioning wheel 31 and a tension detector 32;

[0045] The tensioning wheel 31 is installed on the tension detector 32, and the redirecting pulley 3 is installed on both sides of the tensioning wheel 31. The extension path of the wire rope on the redirecting pulley 3 and the tensioning wheel 31 is arc-shaped.

[0046] In order to avoid the lack of precision when adjusting the tension of multiple steel wire ropes at the same time, and to reduce the impact on the tension of the steel wire ropes when the pulling rate changes, the present invention provides a constant tension mechanism on each spindle disk 11, and each steel wire rope is adjusted and tested individually, so that the tension detection of the output multiple steel wire ropes is not only more accurate, but also the tension of each steel wire rope is stable and similar during continuous operation.

[0047] Specifically, in the present invention, the spindle disks 11 are arranged at equal intervals in the vertical and horizontal directions on the frame 1, and the wire rope reels are installed on the spindle disks 11. Each spindle disk 11 is provided with a constant tension mechanism. When the wire rope is released, the wire rope passes through the constant tension mechanism and the tension detection mechanism and then extends to the production line of the rubber conveyor belt. Then the constant tension mechanism and the tension detection mechanism are started. During the extension process, the wire rope is partially arc-shaped at the redirecting pulley 3 and the tensioning wheel 31. When adjusting the initial tension of the wire rope, the wire rope in the initial state is in a relaxed state. Therefore, the value detected by the tension detector 32 does not match the set value. At this time, under the control of the pre-set program The pay-off motor 21 reverses, thereby causing the center shaft 2 to reverse. During the reversal of the center shaft 2, the wire rope is gradually wound up. As the winding continues, the unfolded length of the wire rope gradually decreases. In the initial state, the weight located between the center shaft 2 and the pay-off roller 23 slides down to the bottom of the lifting groove 22 under the action of gravity, causing the length of the wire rope between the pay-off tube and the center shaft 2 to be greater than the distance between the two. Therefore, as the length of the wire rope shrinks, the wire rope pushes the weight up. When the weight leaves the bottom of the lifting groove 22, the weight of the weight completely acts on the wire rope. Since the tension of the rope is the same as its pulling force, Under the pull of the hammer, the gravity of the heavy hammer provides the tension of the wire rope. Under the force conduction of the wire rope, the tension of the wire rope pushes the tensioning wheel 31 to squeeze the tension detector 32, thereby changing the value of the tension detector 32. Under the action of the pre-set program, the wire-paying motor 21 is controlled to lock, that is, the initial tension of the wire rope is adjusted. Then, when the conveyor belt production equipment pulls the wire rope, the wire-paying motor 21 is controlled to start synchronously. In the process of starting and setting the speed of the synchronous motor when it is running, there is a certain difference between the wire rope pay-off speed and the pulling speed of the wire rope by the conveyor belt production equipment, thereby causing the center shaft 2 and the conveyor belt production equipment to be locked. The length of the wire rope is shortened during the shortening of the wire rope, and the weight moves upward in the lifting groove 22, thereby compensating for the wire rope pay-off rate, so that the rate at which the pay-off roller 23 outputs the wire rope is the same as the pulling rate of the conveyor belt production equipment on the wire rope, thereby keeping the tension of the wire rope constant, and then when the conveyor belt production equipment stops pulling the wire rope, the weight has a tendency to move downward under the action of gravity, so that the wire rope is always pulled by the gravity of the weight, and even if the weight drops, before the weight is supported by the lifting groove 22, the pulling force of the weight on the wire rope remains constant, thereby effectively improving the stability of the wire rope tension.

[0048] The present invention sets a constant tension mechanism and utilizes the gravity of a weight to apply tension to the wire rope. On the one hand, compared with the related art that uses elastic elements such as springs to provide tension, when the length of the wire rope changes, the degree of deformation of the elastic element itself changes, thereby causing the elastic strength of the elastic element to change, resulting in a change in the pulling force on the wire rope. In contrast, in the present invention, when the length of the wire rope changes, the gravity of the weight remains unchanged during the up and down movement of the weight, and the pulling force on the wire rope remains unchanged, thereby allowing the wire rope to always maintain a constant tension. On the other hand, the present invention uses a weight to apply gravity to the wire rope, and changes the extension path of the wire rope through the weight. In the initial state, a wire rope of sufficient length is prepared to alleviate the difference between the pay-out rate and the wire pulling rate, thereby providing sufficient time for the rate change of the pay-out motor 21. When the wire pulling rate changes, the change in the wire rope tension caused by untimely pay-out can be effectively avoided.

[0049] As a preferred embodiment of the present invention, a position sensor is installed in the lifting groove 22, and the position sensor is used to detect the position of the weight in the lifting groove 22. The position sensor is electrically connected to the wire-releasing motor 21, and the speed of the wire-releasing motor 21 is adjusted by the position of the weight. In the initial state, the weight is located in the middle of the lifting groove 22.

[0050] Because under the control of a preset program, when the conveyor belt production equipment pulls the wire rope, the pay-off motor 21 is started synchronously. However, due to the influence of factors such as errors and delays, there is a certain difference between the wire pulling rate of the conveyor belt production equipment and the pay-off rate of the pay-off motor 21. During a long production process, the difference may be positive or negative. Therefore, after the initial tension adjustment is completed, the weight is located in the middle of the lifting groove 22. When the difference between the wire pulling rate and the pay-off rate is a positive value, the pay-off rate is less than the wire pulling rate, which shortens the length of the wire rope between the pay-off roller 23 and the center roller, and the weight rises. The position sensor always detects the position of the weight, and then under the control of the preset program, the weight is The pay-off speed of the pay-off motor 21 electrically connected to the sensor is further accelerated, and when the difference between the pulling speed and the pay-off speed is a negative value, the pay-off speed is greater than the pulling speed, which extends the length of the wire rope between the pay-off roller 23 and the center roller. At this time, the weight drops, and under the control of a preset program, the speed of the pay-off motor 21 continues to decrease. When the pay-off motor 21 stops and the weight has not returned to the initial position in the middle of the lifting slot 22, the pay-off motor 21 reverses to tighten the wire rope, and finally the weight is located in the initial position in the middle of the lifting slot 22. It should be noted that the middle of the lifting slot 22 described in the present invention is actually all positions between the top and bottom of the lifting slot 22, based on the fact that the gravity of the weight completely acts on the wire rope.

[0051] As a preferred embodiment of the present invention, the weight includes a connecting seat 24 and a winding rod 25, the connecting seat 24 is slidably installed in the lifting groove 22, the winding rod 25 is rotatably installed on the connecting seat 24, the winding rod 25 is designed in multiple numbers, and a reversing rod 26 is rotatably installed on the spindle disk 11, the reversing rod 26 is located above the lifting groove 22, and the wire rope is arranged in a wave shape on the winding rod 25 and the reversing rod 26.

[0052] In order to enhance the degree of compensation of the wire rope pulled by the weight for the pay-off rate and the wire pulling rate, the present invention adopts a connecting seat 24 and a winding rod 25 to form a weight, and a reversing rod 26 is further provided. The position of the reversing rod 26 on the spindle disk 11 is fixed. When the wire rope is unfolded from the central axis 2, it is successively wound around the winding rod 25, the reversing rod 26 and the pay-off roller 23, causing the wire rope to be wavy between the central axis 2 and the pay-off roller 23, thereby making the distance between the wire rope and the central axis 2 and the pay-off roller 23 longer. During the rising process of the weight, the pay-off roller 23 can output a longer wire rope for the same rising distance, thereby providing more time for the adjustment of the pay-off motor 21.

[0053] As a preferred embodiment of the present invention, a counterweight groove 27 is provided on the connecting seat 24. The counterweight groove 27 is filled with counterweight beads. The counterweight beads are used to adjust the gravity of the weight.

[0054] By opening a counterweight groove 27 on the connecting seat 24 and filling the counterweight groove 27 with counterweight beads, the total weight of the weight can be effectively adjusted by adjusting the number of the counterweight beads, thereby changing the pulling force of the weight on the wire rope.

[0055] As a preferred embodiment of the present invention, a counterweight box 4 is fixedly installed on the spindle disk 11, and a migration belt 41 and a driving roller 42 are rotatably installed in the counterweight box 4. The driving roller 42 is externally connected to a rotating motor 43, and the rotating motor 43 is electrically connected to a tension detection mechanism. The migration belt 41 is sleeved on the driving roller 42, and the migration belt 41 is provided with evenly distributed adaptation grooves 5, and the adaptation grooves 5 match the counterweight beads. The counterweight box 4 is provided with weight-increasing holes 51, and the opening of the weight-increasing holes 51 is located directly above the counterweight groove 27.

[0056] A gravity sensor and a display screen are arranged at the bottom of the counterweight box 4. The gravity sensor is used to weigh the weight of the counterweight beads, and the display screen is used to display the total weight of the weight.

[0057] The side wall of the connecting seat 24 is provided with a sliding groove 52, and a sealing plate 53 is slidably installed in the sliding groove 52. The counterweight box 4 is located on the moving path of the sealing plate 53. A weight reduction hole 54 is provided at the bottom of the counterweight box 4, and the weight reduction hole 54 is located on the extension path of the migration belt 41.

[0058] The weight-increasing holes 51 and the weight-reducing holes 54 are both extended obliquely, and as the distance from the migration belt 41 is shortened, the height of the weight-increasing holes 51 gradually increases, and the height of the weight-reducing holes 54 gradually decreases.

[0059] The counterweight box 4 is aligned with the top of the lifting slot 22 . A push switch 6 is provided at the top of the lifting slot 22 . The push switch 6 is electrically connected to the rotating motor 43 for connecting the circuit of the rotating motor 43 .

[0060] In order to further enhance the effect of adjusting the tension of the wire rope, a counterweight box 4 is provided in the present invention, and the inner cavity of the counterweight box 4 is filled with counterweight beads. When adjusting the constant tension of the wire rope, under the joint detection of the tension detector 32 and the position sensor, when the weight is located in the middle of the lifting groove 22, if the tension value detected by the tension detector 32 is different from the preset value, the preset weight gravity adjustment program is started. Under the control of the program, the wire-releasing motor 21 is reversed, causing the weight to rise along the lifting groove 22 until the weight rises to the top of the lifting groove 22. In this process, the connecting seat 24 first contacts the bottom end of the counterweight box 4 during movement. Under the obstruction of the counterweight box 4, the blocking plate 53 is blocked, causing the blocking plate 53 and the connecting seat 24 to produce relative movement, thereby making the counterweight groove 27 directly conductive with the side wall of the counterweight box 4. Subsequently, the connecting seat 24 squeezes the push switch 6 at the top of the lifting groove 22, causing the circuit of the rotating motor 43 to be conductive, and the rotating When the rotating motor 43 is started, the forward and reverse rotation of the rotating motor 43 is determined according to the difference between the detection value of the tension detector 32 and the set value. When the detection value of the tension detector 32 is less than the set value, the rotating motor 43 is reversed, and the driving roller 42 drives the transfer belt 41 to rotate. The transfer belt 41 moves from the bottom end of the inner cavity of the counterweight box 4 to the weight-reducing hole 54 first, and then to the weight-increasing hole 51. When the transfer belt 41 moves to the position of the weight-reducing hole 54, the counterweight in the inner cavity of the counterweight box 4 is Under the action of pressure and gravity, the beads have entered the adapter groove 5 on the migration belt 41. Therefore, when the migration belt 41 moves to the weight-reducing hole 54, the counterweight beads in the weight-reducing hole 54 cannot enter the inner cavity of the counterweight box 4. Then, when the migration belt 41 moves to the weight-increasing hole 51, under the action of gravity, the counterweight beads fall from the inclined weight-increasing hole 51 to the top of the counterweight groove 27, and finally fall into the counterweight groove 27, so that the gravity of the weight hammer is gradually increased.

[0061] If the tension value detected by the tension detector 32 is greater than the set value, the rotary motor 43 rotates forward at this time, and when the transfer belt 41 moves, it first moves from the bottom end of the inner cavity of the counterweight box 4 to the position of the weight-increasing hole 51, and then moves to the position of the weight-reducing hole 54. In this process, when the transfer belt 41 is located at the bottom end of the inner cavity of the counterweight box 4, the weight beads enter the adapter groove 5. As the transfer belt 41 gradually rises, when the position of the adapter groove 5 on the transfer belt 41 is higher than the height of the weight beads gathered in the inner cavity of the counterweight box 4, under the action of gravity, the weight beads in the adapter groove 5 When the counterweight bead falls off and the adapter groove 5 on the migration belt 41 is aligned with the weight reduction hole 54, there is no adapter bead in the adapter groove 5 at this time. Therefore, the adapter bead in the weight reduction hole 54 enters the adapter groove 5 and falls into the inner cavity of the counterweight box 4 during continuous rotation, thereby achieving weight reduction of the weight. During the weight adjustment process of the weight, the tension detection mechanism continues to operate until the tension value detected by the tension detector 32 matches the preset value. At this time, the adjustment of the weight of the weight is completed, causing the constant tension value output by the constant tension mechanism to change.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A tension-free station spindle frame, comprising a frame body (1) and a spindle plate (11) mounted on the frame body (1); Features: It also includes a constant tension mechanism and a tension detection mechanism; The constant tension mechanism is installed on the spindle plate (11), and is used to control the pay-off tension of the steel wire rope. The constant tension mechanism comprises a central shaft (2), a pay-off motor (21), a weight, and a pay-off roller (23); The central shaft (2) is rotatably mounted on the spindle plate (11), the pay-off motor (21) is fixedly mounted on the spindle plate (11), and the pay-off motor (21) is connected to the central shaft (2) via a reducer; The spindle plate (11) is provided with a lifting groove (22), and the weight is slidably connected to the spindle plate (11) through the lifting groove (22); A pay-off roller (23) is rotatably mounted on the spindle disk (11), and in an initial state, the steel wire rope extends from the central axis (2) to the weight and the pay-off roller (23) in sequence, and the weight has a tendency to move away from the pay-off roller (23) and the central axis (2) under the action of gravity; The tension detection mechanism is installed on the frame (1), the tension detection mechanism is located on the extension route of the wire rope, and the tension detection mechanism comprises a redirecting pulley (3), a tensioning wheel (31) and a tension detector (32); The tension wheel (31) is mounted on the tension detector (32), the redirecting pulley (3) is mounted on both sides of the tension wheel (31), and the extension path of the steel wire rope on the redirecting pulley (3) and the tension wheel (31) is arc-shaped.

2. The tension-free station spindle frame according to claim 1, characterized in that: A position sensor is installed in the lifting slot (22), and the position sensor is used to detect the position of a weight in the lifting slot (22). The position sensor is electrically connected to the wire-releasing motor (21), and the rotation speed of the wire-releasing motor (21) is adjusted according to the position of the weight. In an initial state, the weight is located in the middle of the lifting slot (22).

3. The tension-free station spindle frame according to claim 2, characterized in that: The weight comprises a connecting seat (24) and a winding rod (25), wherein the connecting seat (24) is slidably mounted in the lifting groove (22), the winding rod (25) is rotatably mounted on the connecting seat (24), the winding rod (25) is designed in plural, a reversing rod (26) is rotatably mounted on the spindle disk (11), the reversing rod (26) is located above the lifting groove (22), and the steel wire rope is arranged in a wave shape on the winding rod (25) and the reversing rod (26).

4. The tension-free station spindle frame according to claim 3, characterized in that: The connecting seat (24) is provided with a counterweight groove (27), and the counterweight groove (27) is filled with counterweight beads, and the counterweight beads are used to adjust the gravity of the weight.

5. The tension-free station spindle frame according to claim 4, characterized in that: A counterweight box (4) is fixedly mounted on the spindle disk (11), a transfer belt (41) and a driving roller (42) are rotatably mounted inside the counterweight box (4), the driving roller (42) is externally connected to a rotating motor (43), the rotating motor (43) is electrically connected to a tension detection mechanism, the transfer belt (41) is sleeved on the driving roller (42), the transfer belt (41) is provided with evenly distributed adaptation grooves (5), the adaptation grooves (5) are matched with the counterweight beads, and the counterweight box (4) is provided with weight-increasing holes (51), the opening of the weight-increasing holes (51) is located directly above the counterweight groove (27).

6. The tension-free station spindle frame according to claim 5, characterized in that: A gravity sensor and a display screen are arranged at the bottom end of the counterweight box (4); the gravity sensor is used to weigh the weight of the counterweight beads, and the display screen is used to display the total weight of the weight.

7. The tension-free station spindle frame according to claim 6, characterized in that: The side wall of the connecting seat (24) is provided with a sliding groove (52), and a sealing plate (53) is slidably installed in the sliding groove (52) through a spring. The counterweight box (4) is located on the moving path of the sealing plate (53), and a weight reduction hole (54) is provided at the bottom of the counterweight box (4), and the weight reduction hole (54) is located on the extension path of the migration belt (41).

8. The tension-free station spindle frame according to claim 7, characterized in that: The weight-increasing holes (51) and the weight-reducing holes (54) are both extended obliquely, and as the distance from the migration zone (41) decreases, the height of the weight-increasing holes (51) gradually increases, while the height of the weight-reducing holes (54) gradually decreases.

9. The tension-free station spindle frame according to claim 8, characterized in that: The counterweight box (4) is aligned with the top of the lifting slot (22), and a push switch (6) is provided at the top of the lifting slot (22). The push switch (6) is electrically connected to the rotating motor (43) for connecting the circuit of the rotating motor (43).

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