CN113120689A - Tension pay-off - Google Patents
Tension pay-off Download PDFInfo
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- CN113120689A CN113120689A CN202110444701.4A CN202110444701A CN113120689A CN 113120689 A CN113120689 A CN 113120689A CN 202110444701 A CN202110444701 A CN 202110444701A CN 113120689 A CN113120689 A CN 113120689A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/02—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package
- B65H59/04—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
- H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/32—Optical fibres or optical cables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/34—Handled filamentary material electric cords or electric power cables
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Abstract
The invention discloses a tension pay-off device. A tension pay-off device comprises a pay-off drum arranged on a frame, wherein the pay-off drum is provided with a pay-off drum rotating shaft and a pay-off drum wheel rim which rotate together with the pay-off drum, and is also provided with a buffering force generating device, a supporting seat and a braking device; the supporting seat is used for supporting and fixing the buffer force generating device; the buffer force generating device is used for receiving power input by the rotary shaft of the pay-off drum and applying buffer force to the rotation of the rotary shaft of the pay-off drum; the buffer force generating device comprises a buffer force generating device shell, and an air pressure through hole is also formed in the buffer force generating device shell; the buffer force generating device comprises a buffer force generating cylinder and a buffer force generating device piston which can axially move along the buffer force generating cylinder, wherein the tail end of the buffer force generating device piston extends out of the buffer force generating cylinder; the brake device is pulled by the buffer force generating device piston to provide damping for the rim of the pay-off drum, and further the rotating speed of the pay-off drum is controlled.
Description
Technical Field
The invention belongs to the technical field of electric power laying equipment, and particularly relates to a tension pay-off device.
Background
Tension paying-off is an erection construction method which keeps a certain tension of an unfolded lead wire in the process of erecting electric wires and enables the lead wire to be separated from the ground and to be in an overhead state. In general, one end of the lead and the ground wire is connected with a tensioner, the other end of the lead and the ground wire is connected with a tractor, the lead and the ground wire are paid off with certain tension, a certain height difference is kept between the lead and the ground wire and a spanning object, and friction is avoided, so that the lead and the ground wire are prevented from being damaged. According to the latest line acceptance regulations, the power line engineering of more than 110kV must adopt tension paying-off, and the optical cable or the lead is not dragged to the ground during the paying-off process. In order to avoid the phenomena of unevenness, hard bending, distortion and the like after the power line is erected due to the interference of high-altitude wind, the constant-tension pay-off technology is a more suitable choice.
In the prior art, the concept of the constant tension pay-off device can be basically summarized as the following.
The utility model provides an idea is invariable through the linear velocity of the cable of control tension unwrapping wire, reach the purpose of stable control tension, but its application condition is carefully studied, it has considerable restriction, it is only applicable to because the spool radius of spool car constantly reduces the tension increase condition that leads to along with the linear velocity reduction that arouses when unwrapping wire, but when aerial cable span is great, or when receiving the influence of wind constantly to rock and vibrate, invariable cable conductor speed can lead to its tension to fluctuate the change on the contrary, make tension too big even, lead to the cable wire to receive the damage, be unfavorable for high quality to accomplish high altitude stringing work. The mode that specifically adopts includes using hysteresis control ware etc. and when using the hysteresis control ware, because the principle of hysteresis control ware is through the relevant law of electromagnetism with kinetic energy consumption and change into heat energy, consequently, long-time the use can make the product overheated for the quick ageing damage of hysteresis control ware, in addition, when using the hysteresis control ware, the sudden strain fluctuation that appears is big more, and the reaction force that the hysteresis control ware produced the very first time also can be big more, and it is excessive resistance to produce very likely, leads to the cable to be drawn excessively and produce the damage. In addition, the invention patent with the application number of CN201811644965.9 provides a cable tension pay-off device, which is characterized in that a motor is arranged at a pay-off carriage, and the motor is not directly connected with a pay-off drum, the motor is equivalent to be connected with a driving roller with a constant outer diameter, and the pay-off drum is used as a driven roller, so as to ensure a constant linear velocity of a cable.
Another idea is to determine the rated tension according to the line design, and preset the control tension of the cable before paying off, and the control tension mode comprises: a driving motor arranged on the tension pay-off device is used for frequency conversion to maintain constant tension, and a motor for applying driving force and a motor for applying resistance are matched to maintain constant tension. However, the tension monitoring device needs to be matched with the control system and the tension control execution system precisely, so that the cost is high, and the tension monitoring device becomes a barrier for popularizing the constant tension paying-off.
Disclosure of Invention
To solve the problems set forth in the background, the present invention provides a tension pay-off device.
A tension pay-off device comprises a pay-off drum arranged on a frame, wherein the pay-off drum is provided with a pay-off drum rotating shaft and a pay-off drum wheel rim which rotate together with the pay-off drum, and is also provided with a buffering force generating device, a supporting seat and a braking device; the supporting seat is used for supporting and fixing the buffer force generating device; the buffer force generating device is used for receiving power input by the rotating shaft of the pay-off drum and applying buffer force to the rotation of the rotating shaft of the pay-off drum; the buffer force generating device comprises a buffer force generating device shell, and an air pressure through hole is also formed in the buffer force generating device shell; a buffering force generating cylinder and a buffering force generating device piston capable of axially moving along the buffering force generating cylinder are arranged in the buffering force generating device shell, a negative pressure cavity is formed between the buffering force generating device piston and the buffering force generating cylinder, and meanwhile, the tail end of the buffering force generating device piston extends out of the buffering force generating cylinder through an opening at the bottom of the buffering force generating cylinder; and the brake device is pulled by the buffer force generating device piston to provide damping for the rim of the pay-off drum so as to control the rotating speed of the pay-off drum.
And a power direction changing device is further arranged and used for receiving power of the rotary shaft of the pay-off drum, and an output shaft of the power direction changing device is arranged in a shell of the power direction changing device and transmits the power to the buffer force generating device.
Furthermore, the output shaft of the power direction changing device is vertically arranged, and the rotating shaft of the pay-off drum is connected with the output shaft of the power direction changing device through a helical gear or in a worm and gear mode.
Furthermore, a power direction changing device supporting column is arranged at the top of the shell of the buffer force generating device and used for supporting the power direction changing device.
Furthermore, a heavy object block is arranged in the shell of the buffer force generating device and is connected with the tail end of the output shaft of the power direction changing device through a connecting rod; the tail end of the output shaft of the power direction changing device is also provided with a bracket which rotates along with the output shaft of the power direction changing device, and the bracket is provided with a pulley; the upper end of the piston of the buffer force generating device is provided with a buffer force generating device rotating piece which can freely rotate on the horizontal plane; the bottom of the weight block is also connected with a rope, and the rope passes through a pulley on a support at the tail end of an output shaft of the power direction changing device and is connected with a rotating part of the buffering force generating device.
Furthermore, a rope connected with the bottom of the weight block passes through a pulley on a support at the tail end of an output shaft of the power direction changing device and is vertically connected with a rotating part of the buffering force generating device.
Further, the rope is made of ultra-high molecular weight polyethylene fibers.
Furthermore, the buffer force generating cylinder is in a multi-section shape; in the bottommost section of the damping force generating cylinderA baffle plate is arranged between the buffer force generating cylinder and the buffer force generating cylinder, a stable vacuum chamber through hole is arranged on the baffle plate, and a space formed by the baffle plate and the bottom of the buffer force generating cylinder is the stable vacuum chamber; according to the direction from the bottom of the buffer force generation cylinder to the output shaft of the power direction changing device, n buffer force generation units are further arranged on the buffer force generation cylinder behind the stable vacuum chamber, wherein the first buffer force generation unit only has a vacuum section, the vacuum section of the first buffer force generation unit is a first vacuum section, the shape and the size of the first vacuum section are the same as those of the stable vacuum chamber, the buffer force generation units arranged in the follow-up process sequentially comprise buffer sections and vacuum sections, the shapes of all the buffer sections and the vacuum sections are the same, the larger the area of the buffer section away from the first vacuum section is, the larger the area of the vacuum section away from the first vacuum section is, and the area of the buffer section in each buffer force generation unit is always larger than the area of the vacuum section; the tail end of a piston of the buffering force generating device penetrates through the through hole of the stable vacuum chamber and finally extends out of the buffering force generating cylinder, n piston pieces are sequentially arranged on the piston of the buffering force generating device along the axial direction, wherein the piston piece farthest from the output shaft of the power direction changing device is a first piston piece, the size and the shape of the kth piston piece are consistent with those of the vacuum section of the kth buffering force generating unit, and when the first piston piece is tightly attached to a baffle plate provided with the through hole of the stable vacuum chamber, the subsequent kth piston piece is kept in the buffering section of the subsequent kth buffering force generating unit, and a gap is reserved between the subsequent kth piston piece and the initial position of the buffering section of the subsequent kth buffering force generating unit; setting the distance between the kth piston sheet and the initial position of the vacuum section of the kth buffer force generation unit as HkIn particular, provision is made for H1The length of the first vacuum section (2.2.4.3) is set to ZkWherein Z is1K is =0, and when k>1 time, ZkIs an arbitrary value; finally, there is Hk=Hk-1+Zk-1Where k is equal to N+And k ∈ (1, n)](ii) a The stable vacuum chamber of the buffer force generating cylinder is also provided with a normally closed one-way valve communicated to the outside of the shell of the buffer force generating device, and the medium allowed by the normally closed one-way valve flows to the shell of the buffer force generating device from the stable vacuum chamber.
Further, inAfter the vacuum chamber is stabilized, 3 buffer force generating units are arranged on the buffer force generating cylinder, wherein the second buffer force generating unit comprises a second buffer section and a second vacuum section, the third buffer force generating unit comprises a third buffer section and a third vacuum section, a piston of the buffer force generating device is provided with 3 piston sheets along the axial direction, the piston sheet farthest from an output shaft of the power direction changing device is a first piston sheet, and the second piston sheet and the third piston sheet are arranged in sequence; when the end face of the first piston piece is tightly attached to a baffle provided with a stable vacuum chamber through hole, the subsequent second piston piece and the subsequent third piston piece are respectively kept in the second buffer section and the third buffer section, a gap is reserved between the second piston piece and the initial position of the second buffer section, and a gap is reserved between the third piston piece and the initial position of the third buffer section; let the length of the first vacuum section be a, H1= a, at the same time, let Z2= b, then H2=a，H3=a+b。
Furthermore, the brake device is in a V-brake mode, and provides damping by tightly holding the rim of the pay-off drum; the end face of the tail end of the piston of the buffering force generating device is connected with a V-brake rope sleeved with a protective layer, and the V-brake rope penetrates through the shell of the buffering force generating device to be connected to the V-brake to provide force for pulling the V-brake to manufacture damping. In fact, the braking device can also be a mechanical disc brake or the like, and a person skilled in the art can replace the braking mode as required.
Compared with the prior art, the technical scheme disclosed by the invention has the following beneficial effects: 1. a new constant tension control idea is provided, namely, effects of buffering and eliminating tension generation and oscillation are achieved by generating multiple sections of different damping with constant values of each section, and from the damping perspective, the scenes of low amplitude, high frequency and high amplitude and low frequency are difficult to process by simple hydraulic damping, and the device disclosed by the invention can have good feedback on the disturbance of various amplitudes and frequencies; the electromagnetic damping is easy to heat and can also suddenly generate overlarge resistance to cause damage of the cable, and the damping value of the device disclosed by the invention is only related to the position of the piston of the buffering force generating device, so that no related trouble exists; for a linear spring, the damping change of the linear spring is linear and certain, is only related to the deformation amount of the linear spring, is difficult to flexibly adjust, is difficult to reflect and play a role in buffering when the tension change is small, the buffering force is uniformly increased when the tension change is large, and is also difficult to restore the tension level in a relatively proper curve, so that the cable is easily damaged due to overlarge tension instantly; for the nonlinear spring, on one hand, the calculation and selection are complex, and on the other hand, the elasticity of the nonlinear spring is easy to lose after the nonlinear spring is used to a certain degree. 2. Compared with the method of controlling tension by matching the driving motor with the resistance motor or controlling tension by using the driving motor alone in a frequency conversion manner, the technical scheme disclosed by the invention has the advantages of lower cost and easiness in upgrading, reconstruction and popularization. 3. Can normally play a role when meeting large span and being influenced by wind, thereby being particularly suitable for the transformation and the upgrade of the prior equipment and having stronger practical application significance.
Drawings
FIG. 1: a schematic view of a tension pay-off device.
FIG. 2: a front view schematic diagram of a tension pay-off device.
FIG. 3: a schematic view of a damping force generating cylinder.
FIG. 4: A-A in FIG. 3 is a schematic sectional view.
FIG. 5: schematic diagram of a piston of the damping force generating device.
FIG. 6: the front view of the piston of the damping force generating device is schematic.
FIG. 7: the inside schematic diagram of the shell of the buffering force generating device in the non-working state.
FIG. 8: the inside of the shell of the buffer force generating device in a non-working state is schematically viewed from the right.
FIG. 9: FIG. 8 is a schematic sectional view B-B.
FIG. 10: the inside schematic diagram of the shell of the buffering force generating device in the working state.
FIG. 11: the inside schematic diagram of buffering power generating device shell is looked at to the right under operating condition.
FIG. 12: FIG. 11 is a schematic cross-sectional view of C-C.
In the figure: 1. the device comprises a pay-off drum, a 1.1-pay-off drum rotating shaft, a 1.2-vehicle frame, a 1.3-pay-off drum rim, a 2.1.1-power direction changing device shell, a 2.1.2-power direction changing device output shaft, a 2.1.3-power direction changing device supporting column, a 2.1.4-weight block, a 2.2.1-buffering force generating device shell, a 2.2.1.1-air pressure through hole, a 2.2.2-buffering force generating device rotating piece, a 2.2.3-buffering force generating device piston, 2.2.3.1-a first piston piece, 2.2.3.2-a second piston piece, 2.2.3.3-a third piston piece, 2.2.3.4-a piston end face of the force generating device, a 2.2.4-buffering force generating cylinder, 2.2.4.1-a stable vacuum chamber, 2.2.4.2-a stable vacuum chamber through hole, 2.2.4.3-a first vacuum section, 2.2.4.4-a second buffering section, 2.2.4.5-a second vacuum section, 2.2.4.6-a third buffering vacuum section, 2.2.4.7-a supporting seat and a supporting seat.
Detailed Description
The embodiments of the present invention will be described in conjunction with the drawings in the specification, and the embodiments are disclosed for the purpose of illustrating the invention rather than limiting the invention, and all technical solutions which are simple to replace, combine and develop on the basis of the present invention shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1-12. A tension pay-off device comprises a pay-off drum 1 arranged on a frame 1.2, wherein the pay-off drum 1 is provided with a pay-off drum rotating shaft 1.1 and a pay-off drum rim 1.3 which rotate together with the pay-off drum 1, and is also provided with a buffering force generating device, a supporting seat 2.3 and a brake device (not shown in the figure); the supporting seat 2.3 is used for supporting and fixing the buffer force generating device; the buffering force generating device is used for receiving power input by the rotary shaft 1.1 of the pay-off drum and applying buffering force to the rotation of the rotary shaft 1.1 of the pay-off drum; the buffer force generating device comprises a buffer force generating device shell 2.2.1, and an air pressure through hole 2.2.1.1 is also arranged on the buffer force generating device shell 2.2.1; a buffer force generating cylinder 2.2.4 and a buffer force generating device piston 2.2.3 capable of axially moving along the buffer force generating cylinder 2.2.4 are arranged in the buffer force generating device shell 2.2.1, a negative pressure cavity is formed inside the buffer force generating device piston 2.2.3 and the buffer force generating cylinder 2.2.4, and meanwhile, the tail end of the buffer force generating device piston 2.2.3 extends out of the buffer force generating cylinder 2.2.4 through an opening at the bottom of the buffer force generating cylinder 2.2.4; and the brake device is pulled by the buffer force generating device piston 2.2.3 to provide damping for the rim 1.3 of the pay-off drum, so that the rotating speed of the pay-off drum 1 is controlled.
Furthermore, a power direction changing device is arranged and used for receiving power of the rotary shaft 1.1 of the pay-off drum, an output shaft 2.1.2 of the power direction changing device is arranged in a shell 2.1.1 of the power direction changing device, and the power is transmitted to the buffer force generating device through the output shaft 2.1.2 of the power direction changing device.
Further, the output shaft 2.1.2 of the power direction changing device is vertically arranged, and the rotating shaft 1.1 of the pay-off drum is connected with the output shaft 2.1.2 of the power direction changing device through a bevel gear or in a worm and gear mode.
Furthermore, a power direction changing device supporting column 2.1.3 is arranged at the top of the shell 2.2.1 of the buffer force generating device and used for supporting the power direction changing device.
Furthermore, a heavy object block 2.1.4 is arranged in the shell 2.2.1 of the buffer force generating device, and the heavy object block 2.1.4 is connected with the tail end of the output shaft 2.1.2 of the power direction changing device through a connecting rod; the tail end of the output shaft 2.1.2 of the power direction changing device is also provided with a bracket which rotates along with the output shaft 2.1.2 of the power direction changing device, and the bracket is provided with a pulley; the upper end of the piston 2.2.3 of the buffer force generating device is provided with a buffer force generating device rotating piece 2.2.2 which can freely rotate on the horizontal plane; the bottom of the weight block 2.1.4 is also connected with a rope, and the rope passes through a pulley on a bracket at the tail end of the output shaft 2.1.2 of the power direction changing device and is connected with the rotating part 2.2.2 of the buffer force generating device.
Furthermore, a rope connected with the bottom of the heavy object block 2.1.4 passes through a pulley on a support at the tail end of the output shaft 2.1.2 of the power direction changing device and is vertically connected with the rotating piece 2.2.2 of the buffering force generating device. In fact, a non-vertical connection of the cable to the rotating element 2.2.2 of the damping force generating device can also be used, but a vertical connection is preferred because it would lead to radial forces on the following parts during movement, which would be detrimental to the long term use and maintenance of the apparatus.
Further, the rope is made of ultra-high molecular weight polyethylene fibers. High strength nylon, high strength polyester ropes may also be used.
Further, the buffer force generating cylinder 2.2.4 is in a multi-section shape; a baffle is arranged in the middle of the section at the bottommost part of the buffer force generation cylinder 2.2.4, a stable vacuum chamber through hole 2.2.4.2 is arranged on the baffle, and a space formed by the baffle and the bottom part of the buffer force generation cylinder 2.2.4 is a stable vacuum chamber 2.2.4.1; according to the direction from the bottom of the buffer force generating cylinder 2.2.4 to the output shaft 2.1.2 of the power direction changing device, n buffer force generating units are further arranged in the buffer force generating cylinder 2.2.4 behind the stable vacuum chamber 2.2.4.1, wherein the first buffer force generating unit only has a vacuum section, the vacuum section of the first buffer force generating unit is a first vacuum section 2.2.4.3, the shape and the size of the first vacuum section 2.2.4.3 are the same as those of the stable vacuum chamber 2.2.4.1, the subsequently arranged buffer force generating units sequentially comprise buffer sections and vacuum sections, the shapes of all the buffer sections and the vacuum sections are the same, the larger the area of the buffer section which is farther from the first vacuum section 2.2.4.3 is, the larger the area of the vacuum section which is farther from the first vacuum section 2.2.4.3 is, and the area of the buffer section in each buffer force generating unit is always larger than that of the vacuum section; the tail end of a buffer force generating device piston 2.2.3 penetrates through a stable vacuum chamber through hole 2.2.4.2 and finally extends out of a buffer force generating cylinder 2.2.4, the buffer force generating device piston 2.2.3 is sequentially provided with n piston sheets along the axial direction, wherein the piston sheet farthest from an output shaft 2.1.2 of the power direction changing device is a first piston sheet 2.2.3.1, the size and the shape of a vacuum section of the kth piston sheet are consistent with those of a vacuum section of the kth buffer force generating unit, and when the end surface of the first piston sheet 2.2.3.1 is tightly attached to a baffle provided with a stable vacuum chamber through hole 2.2.4.1, the subsequent kth piston sheet is kept in the buffer section of the subsequent kth buffer force generating unit, and a gap is reserved between the subsequent kth piston sheet and the initial position of the buffer section of the kth buffer force generating unit; setting the distance between the kth piston sheet and the initial position of the vacuum section of the kth buffer force generation unit as HkIn particular, provision is made for H1Setting the length of the vacuum section of the kth buffer force generation unit for the length of the first vacuum section (2.2.4.3)Is ZkWherein Z is1K is =0, and when k>1 time, ZkIs an arbitrary value; finally, there is Hk=Hk-1+Zk-1Where k is equal to N+And k ∈ (1, n)](ii) a At the position of the stabilizing vacuum chamber 2.2.4.1 of the damping force generating cylinder 2.2.4, a normally closed one-way valve (not shown) is also provided to the outside of the damping force generating device housing 2.2.1, which allows medium to flow from the stabilizing vacuum chamber 2.2.4.1 to the damping force generating device housing 2.2.1. In this embodiment, n is 3.
Therefore, after the vacuum chamber 2.2.4.1 is stabilized, the damping force generating cylinder 2.2.4 is further provided with 3 damping force generating units, wherein the second damping force generating unit comprises a second damping section 2.2.4.4 and a second vacuum section 2.2.4.5, the third damping force generating unit comprises a third damping section 2.2.4.6 and a third vacuum section 2.2.4.7, the damping force generating device piston 2.2.3 is provided with 3 piston plates along the axial direction, wherein the piston plate farthest from the power direction changing device output shaft 2.1.2 is a first piston plate 2.2.3.1, and the second piston plate 2.2.3.2 and the third piston plate 2.2.3.3 are arranged in sequence; when the first piston sheet 2.2.3.1 is tightly attached to the baffle with the stable vacuum chamber through hole 2.2.4.1, the subsequent second piston sheet 2.2.3.2 and the subsequent third piston sheet 2.2.3.3 are respectively kept in the second buffer section 2.2.4.4 and the third buffer section 2.2.4.6, a gap is left between the second piston sheet 2.2.3.2 and the initial position of the second buffer section 2.2.4.4, and a gap is left between the third piston sheet 2.2.3.3 and the initial position of the third buffer section 2.2.4.6; let the length of the first vacuum section 2.2.4.3 be a, H1= a, at the same time, let Z2= b, then H2=a，H3=a+b。
The brake device is in a V-brake mode, and provides damping by tightly holding the rim 1.2 of the pay-off drum; the end surface 2.2.3.4 of the tail end of the piston of the buffer force generating device is connected with a V-brake rope which is sleeved with a protective layer, the V-brake rope penetrates through the shell 2.2.1 of the buffer force generating device and is connected to the V-brake, and the force for pulling the V-brake to manufacture the damping is provided.
The device mainly aims to provide buffer force in the tension pay-off process, so that constant tension pay-off is basically realized. The cylinder 2.2.4.2 takes place with the buffer power from piston piece for the buffer power of this device, because different piston piece areas are different, and the atmospheric pressure that different piston pieces received at corresponding buffer power generation unit vacuum section is different to provide different power, and then the damping force that the pulling V stopped the manufacturing is different, makes tension can keep comparatively stable state.
When the damping force generating device piston 2.2.3 is matched with the damping force generating cylinder 2.2.4, in a non-working state, the first piston sheet 2.2.3.1 is tightly attached to the baffle provided with the stable vacuum chamber through hole 2.2.4.2, and the stable vacuum chamber formed by the first piston sheet 2.2.3.1 and the bottom of the damping force generating cylinder 2.2.4.2 is vacuumized to be negative pressure through the one-way valve. When the device starts to work, a rotating shaft 1.1 of the pay-off drum rotates, the weight block 2.1.4 starts to move centrifugally under the action of a plurality of forces and pulls the rope to pull a piston 2.2.3 of the buffering force generating device to move upwards in the rising process, and then a certain pulling force is given to the V brake so as to provide damping for the pay-off drum 1, so that the tension is constant, under the condition of stable tension, the piston 2.2.3 of the buffering force generating device can reach a balanced state at a certain position and is stable and motionless, if the cable sways due to strong wind and the tension is continuously increased and decreased, when the rate of increasing the tension is lower, the device can provide a section of stable resistance, then the resistance provided can be increased after the next piston sheet acts, the resistance cannot be continuously and suddenly increased, so that the cable is subjected to higher tension in a very short time, thereby lead to the cable to be pulled and damage, when tension grow rate is great, this device also can constantly promote the resistance, make damping and external input's tension match, it is excessive to prevent that the cable from being pulled, lead to rubbing ground or other equipment and lead to wearing and tearing, vibrate the in-process, when tension reduces, show that external strong wind tends to be stable, the state that reduces, thereby the rotational speed of paying out reel 1 reduces, and then the pulling force that provides the V to stop reduces, correspondingly, V stops that the power that prevents paying out reel rim 1.3 also reduces, and then guarantee that the rotational speed of paying out reel 1 can not become the rotational speed owing to preceding high damping and hang down excessively, entire system gets back to balanced state gradually again, maintain tension invariable.
If necessary, a small vacuum pump may be added in conjunction with the check valve to provide a relatively stable vacuum level and thus a more stable damping force.
Example 2
The present embodiment is different from embodiment 1 in that: the top of the shell 2.2.1 of the buffer force generating device is not provided with a power deviator supporting column 2.1.3 any more, but the shell of the power deviator is fixed on the frame 1.2; the tail end of an output shaft 2.1.2 of the power direction changing device is connected with a heavy object block 2.1.4 through a rope, and the heavy object block 2.1.4 is connected with a rotating piece 2.2.2 of the buffer force generating device through the rope; there are 4 damping force generating units and correspondingly the damping force generating device piston 2.2.3 is also provided with a first to a fourth piston plate, so that, at H1=a、Z2=b、Z3If = c, H is known2=a，H3=a+b，H4= a + b + c. However, those skilled in the art can still easily understand that the device disclosed in this embodiment can provide a damping force to stabilize the tension force according to the structure disclosed in this embodiment.
Claims (10)
1. The utility model provides a tension pay-off, is including arranging pay off section of thick bamboo (1) on frame (1.2) in, and pay off section of thick bamboo (1) is equipped with pay off section of thick bamboo rotation axis (1.1) and pay off section of thick bamboo wheel rim (1.3) with pay off section of thick bamboo (1) co-rotation, its characterized in that: the device is also provided with a buffer force generating device, a supporting seat (2.3) and a brake device;
the supporting seat (2.3) is used for supporting and fixing the buffer force generating device;
the buffering force generating device is used for receiving power input by the rotating shaft (1.1) of the pay-off drum and applying buffering force to the rotation of the rotating shaft (1.1) of the pay-off drum;
the buffer force generating device comprises a buffer force generating device shell (2.2.1), and an air pressure through hole (2.2.1.1) is also formed in the buffer force generating device shell (2.2.1);
a buffer force generating cylinder (2.2.4) and a buffer force generating device piston (2.2.3) capable of axially moving along the buffer force generating cylinder (2.2.4) are arranged in a buffer force generating device shell (2.2.1), a negative pressure cavity is formed inside the buffer force generating device piston (2.2.3) and the buffer force generating cylinder (2.2.4), and meanwhile, the tail end of the buffer force generating device piston (2.2.3) extends out of the buffer force generating cylinder (2.2.4) through an opening at the bottom of the buffer force generating cylinder (2.2.4);
and the brake device is pulled by a buffer force generating device piston (2.2.3) to provide damping for a rim (1.3) of the pay-off drum, so that the rotating speed of the pay-off drum (1) is controlled.
2. A tension pay-off device as defined in claim 1, wherein: the buffer device is characterized by also comprising a power direction changing device, wherein the power direction changing device is used for receiving the power of the rotary shaft (1.1) of the pay-off drum, an output shaft (2.1.2) of the power direction changing device is arranged in a shell (2.1.1) of the power direction changing device, and the power is transmitted to the buffer force generating device through the output shaft (2.1.2) of the power direction changing device.
3. A tension pay-off device as defined in claim 2, wherein: an output shaft (2.1.2) of the power direction changing device is vertically arranged, and a rotating shaft (1.1) of the pay-off drum is connected with the output shaft (2.1.2) of the power direction changing device through a helical gear or in a worm and gear mode.
4. A tension pay-off device as defined in claim 2, wherein: the top of the shell (2.2.1) of the buffer force generating device is provided with a power direction changing device supporting column (2.1.3) for supporting the power direction changing device.
5. A tension pay-off device as defined in claim 3, wherein: a heavy object block (2.1.4) is arranged in a shell (2.2.1) of the buffer force generating device, and the heavy object block (2.1.4) is connected with the tail end of an output shaft (2.1.2) of the power direction changing device through a connecting rod;
the tail end of the output shaft (2.1.2) of the power direction changing device is also provided with a support rotating along with the output shaft (2.1.2) of the power direction changing device, and the support is provided with a pulley;
the upper end of the piston (2.2.3) of the buffer force generating device is provided with a buffer force generating device rotating piece (2.2.2) which can freely rotate on the horizontal plane;
the bottom of the weight block (2.1.4) is also connected with a rope, and the rope passes through a pulley on a bracket at the tail end of an output shaft (2.1.2) of the power direction changing device and is connected with a rotating piece (2.2.2) of the buffering force generating device.
6. A tension pay-off device as defined in claim 5, wherein: the rope connected with the bottom of the weight block (2.1.4) passes through a pulley on a support at the tail end of an output shaft (2.1.2) of the power direction changing device and is vertically connected with a rotating part (2.2.2) of the buffering force generating device.
7. A tension pay-off device as defined in claim 5, wherein: the rope is made of ultra-high molecular weight polyethylene fiber.
8. A tension pay-off device as defined in claim 5, wherein: the buffer force generating cylinder (2.2.4) is in a multi-section shape; a baffle plate is arranged in the middle of the section of the bottommost part of the buffer force generating cylinder (2.2.4), a stable vacuum chamber through hole (2.2.4.2) is formed in the baffle plate, and a space formed by the baffle plate and the bottom part of the buffer force generating cylinder (2.2.4) is a stable vacuum chamber (2.2.4.1); according to the direction from the bottom of the buffer force generating cylinder (2.2.4) to the output shaft (2.1.2) of the power direction changing device, n buffer force generating units are further arranged on the buffer force generating cylinder (2.2.4) behind the stable vacuum chamber (2.2.4.1), wherein the first buffer force generating unit only has a vacuum section, the vacuum section of the first buffer force generating unit is a first vacuum section (2.2.4.3), the shape and the size of the first vacuum section (2.2.4.3) are the same as those of the stable vacuum chamber (2.2.4.1), the subsequently arranged buffer force generating units sequentially comprise buffer sections and vacuum sections, the shapes of all the buffer sections and the vacuum sections are the same, the larger the area of the buffer section which is farther from the first vacuum section (2.2.4.3), the larger the area of the vacuum section which is farther from the first vacuum section (2.2.4.3), and the area of each buffer force generating unit is always larger than that of the vacuum section;
the tail end of a buffer force generating device piston (2.2.3) penetrates through a stable vacuum chamber through hole (2.2.4.2) and finally extends out of a buffer force generating cylinder (2.2.4), the buffer force generating device piston (2.2.3) is sequentially provided with n piston plates along the axial direction, wherein the piston plate farthest from an output shaft (2.1.2) of the power direction changing device is a first piston plate (2.2.3.1), the size and the shape of a kth piston plate are consistent with those of a vacuum section of a kth buffer force generating unit, and when the end surface of the first piston plate (2.2.3.1) is tightly attached to a baffle plate provided with a stable vacuum chamber through hole (2.2.4.1), the subsequent kth piston plate is kept in the buffer section of the subsequent kth buffer force generating unit, and a gap is reserved between the subsequent kth buffer section and the initial position of the buffer force generating unit;
setting the distance between the kth piston sheet and the initial position of the vacuum section of the kth buffer force generation unit as HkIn particular, provision is made for H1The length of the first vacuum section (2.2.4.3) is set to ZkWherein Z is1K is =0, and when k>1 time, ZkIs an arbitrary value; finally, there is Hk=Hk-1+Zk-1Where k is equal to N+And k ∈ (1, n)]；
The stable vacuum chamber (2.2.4.1) of the buffer force generating cylinder (2.2.4) is also provided with a normally closed one-way valve communicated to the outside of the buffer force generating device shell (2.2.1), and the medium allowed by the normally closed one-way valve flows to the stable vacuum chamber (2.2.4.1) to the buffer force generating device shell (2.2.1).
9. A tension payout device as defined in claim 8, wherein: after a vacuum chamber (2.2.4.1) is stabilized, 3 buffer force generating units are arranged on a buffer force generating cylinder (2.2.4), wherein the second buffer force generating unit comprises a second buffer section (2.2.4.4) and a second vacuum section (2.2.4.5), the third buffer force generating unit comprises a third buffer section (2.2.4.6) and a third vacuum section (2.2.4.7), and a buffer force generating device piston (2.2.3) is axially provided with 3 piston plates, wherein the piston plate farthest from an output shaft (2.1.2) of a power direction changing device is a first piston plate (2.2.3.1), and then a second piston plate (2.2.3.2) and a third piston plate (2.2.3.3) are sequentially arranged;
when the first piston sheet (2.2.3.1) is tightly attached to a baffle provided with a stable vacuum chamber through hole (2.2.4.1), the subsequent second piston sheet (2.2.3.2) and the subsequent third piston sheet (2.2.3.3) are respectively kept in the second buffer section (2.2.4.4) and the third buffer section (2.2.4.6), a gap is reserved between the second piston sheet (2.2.3.2) and the initial position of the second buffer section (2.2.4.4), and a gap is reserved between the third piston sheet (2.2.3.3) and the initial position of the third buffer section (2.2.4.6);
let the length of the first vacuum section (2.2.4.3) be a, H1= a, at the same time, let Z2= b, then H2=a，H3=a+b。
10. A tension pay-off device as defined in claim 1, wherein: the brake device is in a V-brake mode, and provides damping by tightly holding the rim (1.2) of the pay-off drum; the end face (2.2.3.4) of the tail end of the piston of the buffer force generating device is connected with a V-brake rope which is sleeved with a protective layer, the V-brake rope penetrates through a shell (2.2.1) of the buffer force generating device and is connected to the V-brake, and force for pulling the V-brake to manufacture damping is provided.
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| CN202110444701.4A CN113120689B (en) | 2021-04-24 | 2021-04-24 | Tension pay-off |
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| CN202110444701.4A CN113120689B (en) | 2021-04-24 | 2021-04-24 | Tension pay-off |
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| CN113120689B CN113120689B (en) | 2022-06-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115520727A (en) * | 2022-09-20 | 2022-12-27 | 湖南三湘电线电缆有限责任公司 | Pay-off device for wires and cables and pay-off method thereof |
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| US20150217967A1 (en) * | 2014-02-05 | 2015-08-06 | Polypipe Handling Specialists, Inc. | Apparatus for deploying and retrieving hose |
| CN108675054A (en) * | 2018-06-14 | 2018-10-19 | 江苏都盛科技发展有限公司 | A kind of experimental branch line tow tension buffer unit |
| CN209322203U (en) * | 2018-12-29 | 2019-08-30 | 天津高盛钢丝绳有限公司 | A kind of unwrapping wire roller with tension regulating function |
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| CN115520727A (en) * | 2022-09-20 | 2022-12-27 | 湖南三湘电线电缆有限责任公司 | Pay-off device for wires and cables and pay-off method thereof |
| CN115520727B (en) * | 2022-09-20 | 2023-09-26 | 湖南三湘电线电缆有限责任公司 | Paying-off device and paying-off method for electric wires and cables |
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