Cable pay-off device for municipal building construction

Abstract

The invention discloses a cable pay-off device for municipal building construction, and belongs to the technical field of cable pay-off racks. A cable pay-off device for municipal building construction comprises a pay-off table used for installing a wire coil, the pay-off table is installed on a pay-off base, a middle vertical rod is arranged on the pay-off table, a brake mechanism and a lifting mechanism are arranged in the pay-off base, the brake mechanism is located between the pay-off table and the pay-off base, and the lifting mechanism is located between the pay-off table and the pay-off base. The friction force between the pay-off table and the brake mechanism is adjusted through the lifting mechanism; the pay-off rack has the advantages that the rotating speed of the cable drum on the pay-off rack is prevented from being too high, and the rotating speed of the cable drum on the pay-off rack is effectively controlled.

Description

Technical Field

[0001] The invention relates to the technical field of cable pay-off racks, and in particular to a cable pay-off device for municipal building construction. Background Art

[0002] The cable pay-off rack is a commonly used tool in municipal construction and power construction. Its main function is to install a large cable reel to facilitate the rotation of the cable reel to retract and release the cable. Since the large cable reel is heavy, the current cable pay-off rack is generally made of a heavier metal structure. In addition to carrying the pay-off rack, it can also prevent rollover.

[0003] Existing cable pay-off racks are mainly divided into vertical pay-off racks and horizontal pay-off racks according to the placement of the cable reels. The difference between the two lies in the direction of the cable reel shaft after the cable reel is placed on the pay-off rack. The vertical pay-off rack is vertical, and the horizontal pay-off rack is horizontal.

[0004] During the process of paying out the wire reel, one issue that needs attention is that, first, during the process of paying out the wire, if you stop pulling the wire, the wire reel will continue to rotate due to inertia, which will often cause the cable to be out of order and cause a large amount of cable to be entangled in the pay-off frame or the bottom of the reel, affecting the subsequent pay-out; second, during the process of paying out the wire, the speed of the wire reel should not be too fast, especially for the wire reel with larger mass. If the speed is too fast, it will be difficult to stop in time during the rapid rotation, which will cause the problem of situation one and increase the safety risk.

[0005] In the prior art, due to structural differences, it is easy to add a brake mechanism to a horizontal pay-off stand to solve the above problem, while a vertical pay-off stand is currently rarely equipped with a brake mechanism, which affects the convenience and safety of cable pay-off. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that few current vertical pay-off racks are equipped with brake mechanisms, and to propose a cable pay-off device for municipal building construction.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A cable pay-off device for municipal building construction comprises a pay-off platform for installing a cable drum, the pay-off platform is installed on a pay-off seat, an intermediate vertical pole is arranged on the pay-off platform, a brake mechanism and a lifting mechanism are arranged inside the pay-off seat, the brake mechanism is located between the pay-off platform and the pay-off seat, and the friction force between the pay-off platform and the brake mechanism is adjusted by the lifting mechanism.

[0008] Furthermore, the brake mechanism includes a brake groove opened on the top surface of the wire pay-off seat, the upper part of the brake groove is sealed with a brake block, the brake block is movably installed in the brake groove, and the lower part of the brake groove is filled with hydraulic oil to drive the brake block to move.

[0009] Furthermore, a lifting mechanism is arranged below the brake mechanism, and the lifting mechanism includes a floating plate groove opened inside the wire-paying seat, a floating plate is movably installed on the inner side of the floating plate groove, and the floating plate divides the floating plate groove into an upper floating plate cavity located at the upper part and a lower floating plate cavity located at the lower part, and the interior of the lower floating plate cavity is filled with hydraulic oil for driving the floating plate to move, and the top of the floating plate is in contact with the bottom surface of the wire-paying table.

[0010] Furthermore, the wire-laying platform comprises a wire-laying plate, a truncated platform, and an intermediate support surface. A truncated platform with a larger top and a smaller bottom is provided at the bottom of the wire-laying plate, and the bottom end surface of the truncated platform is the intermediate support surface. The top surface of the wire-releasing seat is provided with a truncated cone groove corresponding to the truncated cone, and the brake groove is arranged on the inclined surface of the truncated cone groove.

[0011] Furthermore, an edge support surface is provided at a position of the wire-releasing plate located outside the truncated table, and the lifting mechanism further includes a roller located below the edge support surface, and the roller is mounted on the floating plate.

[0012] Furthermore, a roller groove is provided at a position of the pay-off seat below the edge support surface, a roller is provided inside the roller groove, a roller base is provided at the bottom of the roller, and the roller base is fixedly mounted on the floating plate.

[0013] Furthermore, a bearing groove is arranged in the middle of the truncated cone groove, a plane bearing is arranged inside the bearing groove, the top of the plane bearing contacts with the middle supporting surface, and the bottom of the plane bearing is connected with the floating plate.

[0014] Furthermore, a drive box is provided on one side of the pay-off seat, and the drive box includes a transmission box and a ratchet wrench for driving the transmission box; A transmission seat is arranged inside the transmission box, and a first hydraulic chamber connected to the floating plate groove and a second hydraulic chamber connected to the brake groove are provided inside the transmission seat. A first piston for adjusting the hydraulic pressure is arranged inside the first hydraulic chamber, and a second piston for adjusting the hydraulic pressure is arranged inside the second hydraulic chamber. Both the first piston and the second piston are connected to a screw rod, and the screw rod is connected to a ratchet wrench.

[0015] Furthermore, the screw is located between the first piston and the second piston, and rotating blocks are rotatably arranged inside the first piston and the second piston. Both ends of the screw are respectively connected to the two rotating blocks, and the screw, the first piston, the rotating block and the second piston are coaxially arranged.

[0016] Furthermore, a transmission mechanism is arranged between the screw and the ratchet wrench, and the transmission mechanism includes a first gear mounted on the screw, a reduction gear meshing with the first gear, and a worm gear structure connected to the reduction gear, and the ratchet wrench is connected to the input end of the worm gear structure.

[0017] Compared with the prior art, the present invention provides a cable laying device for municipal construction construction, which has the following beneficial effects: The present invention discloses a cable pay-off device for municipal building construction. When in use, the cable reel is placed upright on a pay-off platform, a middle vertical pole is passed through a through hole in the center of the cable reel, the dead weight of the cable reel is used to press on the pay-off platform, the pay-off platform is pressed tightly on a brake mechanism, the brake mechanism is used to prevent the cable reel and the pay-off platform from rotating freely, and then the friction between the pay-off platform and the brake mechanism is adjusted by a lifting mechanism, so that when the pay-off platform and the cable reel are in use, the friction is reduced when they need to rotate, and increased when they do not need to rotate, so as to provide a brake function for stopping the cable reel, thereby improving the convenience and safety of pay-off.

[0018] Other advantages, objectives and features of the present invention will be described in part in the following description; and in part, will be apparent to those skilled in the art based on an examination of the following; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the pay-off platform structure of the present invention from the lower right perspective; Figure 3 It is a schematic diagram of the main structure of the pay-off platform of the present invention; Figure 4 It is a three-dimensional schematic diagram of the pay-off seat structure of the present invention; Figure 5 It is a schematic diagram of the explosion effect of the pay-off seat structure of the present invention; Figure 6 It is a partial cross-sectional stereoscopic schematic diagram of the pay-off seat structure of the present invention; Figure 7 It is a partial cross-sectional front view schematic diagram of the pay-off seat structure of the present invention; Figure 8 It is a three-dimensional schematic diagram of the drive box structure of the present invention; Fig. 9 It is a three-dimensional schematic diagram of the internal structure of the transmission box of the present invention; Fig.10 It is a front view schematic diagram of the internal structure of the transmission box of the present invention; Fig.11 It is a schematic cross-sectional view of the screw structure of the present invention; Fig.12 For the present invention Fig.11 A schematic diagram of the enlarged structure of part A.

[0020] In the figure: 1. Pay-off table; 101. Pay-off plate; 102. Round table; 103. Middle support surface; 104. Edge support surface; 2. Pay-off seat; 201. Seat body; 202. Round table groove; 203. Plane bearing; 204. Bearing groove; 3. Drive box; 301. Ratchet wrench; 302. Transmission box; 303. Transmission seat; 304. Screw; 305. First hydraulic chamber; 306. First piston; 307. Second hydraulic chamber; 308. Worm; 309. Hexagonal nut; 310. Rotating block; 311. Second piston; 312. First connection port; 313. Second connection port; 314. 4. Upper bottom; 315. Lower bottom; 316. Trapezoidal height; 317. Pitch; 318. Cylinder; 319. Screw thread; 4. Brake mechanism; 401. Brake groove; 402. Brake block; 403. Connecting hole; 5. Lifting mechanism; 501. Floating plate groove; 502. Floating plate; 503. Roller base; 504. Roller; 505. Roller groove; 506. Lower floating plate cavity; 507. Upper floating plate cavity; 508. Middle support platform; 6. Transmission mechanism; 601. First gear; 602. Small gear; 603. Large gear; 604. Worm gear; 605. Reduction gear; 7. Middle vertical pole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-12 The present invention discloses a cable pay-off device for municipal construction, comprising a pay-off platform 1 for installing a cable drum, wherein the pay-off platform 1 is installed on a pay-off seat 2, an intermediate vertical pole 7 is installed on the pay-off platform 1, a brake mechanism 4 and a lifting mechanism 5 are installed inside the pay-off seat 2, the brake mechanism 4 is located between the pay-off platform 1 and the pay-off seat 2, and when the brake mechanism 4 contacts the pay-off platform 1, friction is generated between the pay-off platform 1 and the pay-off seat 2.

[0023] The lifting mechanism 5 is used to lift the pay-off platform 1 and the cable reel, so as to adjust the pressure exerted by the pay-off platform 1 on the brake mechanism 4. According to the friction calculation formula, when the friction coefficient remains unchanged, the pressure decreases, and the friction force decreases. Therefore, the friction force between the pay-off platform 1 and the brake mechanism 4 is adjusted by the lifting mechanism 5. By adjusting the friction force, the resistance of the cable to drive the cable reel and the pay-off platform 1 to rotate during the pay-off process is adjusted. The resistance is adjusted as needed to make the cable reel and the pay-off platform 1 rotate or stop.

[0024] The brake mechanism 4 includes a brake groove 401 formed on the top surface of the pay-off seat 2. The brake groove 401 is a sink groove with an open top. The brake groove 401 can be as shown in the attached figure. Figure 5 The fan annular groove shown may also be a groove of other shapes, such as circular, rectangular, or annular.

[0025] A brake block 402 is sealably installed on the upper portion of the brake groove 401, and the brake block 402 is movably installed in the brake groove 401. Specifically, the brake block 402 and the brake groove 401 may be slidably connected, and then the brake block 402 and the brake groove 401 are dynamically sealed by a sealing ring, and at this time, the brake block 402 is equivalent to a piston structure; or a gap is provided between the brake block 402 and the brake groove 401, and then a soft connection and a sealed connection are formed between the brake groove 401 and the brake block 402 by rubber, either of which is acceptable.

[0026] The lower part of the brake groove 401 is filled with hydraulic oil for moving the brake block 402. The hydraulic oil is used to support the brake block 402. By adjusting the pressure transmitted by the hydraulic oil, the pressure of the brake block 402 on the wire-paying table 1 is further adjusted, thereby changing the friction between the brake block 402 and the wire-paying table 1.

[0027] A lifting mechanism 5 is installed below the brake mechanism 4, and the lifting mechanism 5 is used to lift the pay-off platform 1 and the cable reel upwards.

[0028] The lifting mechanism 5 includes a floating plate groove 501 opened inside the pay-off seat 2 , a bearing groove 204 is opened in the middle of the top of the floating plate groove 501 , and the inside and the outside of the floating plate groove 501 are communicated through the bearing groove 204 .

[0029] A floating plate 502 is movably installed on the inner side of the floating plate groove 501 in the up and down directions. The floating plate 502 divides the floating plate groove 501 into an upper floating plate cavity 507 located at the upper part and a lower floating plate cavity 506 located at the lower part. The floating plate 502 and the floating plate groove 501 are also sealed. The specific connection method includes a sliding connection between the floating plate 502 and the floating plate groove 501, and a sealing ring is provided between the floating plate 502 and the floating plate groove 501 to achieve dynamic sealing; or the outer wall of the floating plate 502 and the inner wall of the floating plate groove 501 are softly connected and sealed by rubber, thereby dividing the floating plate groove 501 into an upper floating plate cavity 507 and a lower floating plate cavity 506 separated from each other.

[0030] The interior of the lower floating plate cavity 506 is filled with hydraulic oil for driving the floating plate 502 to move. The floating plate 502 is supported by the hydraulic oil in the same principle as mentioned above, and then the pressure transmitted by the hydraulic oil is adjusted to adjust the pressure of the hydraulic oil transmitted to the floating plate 502. The top of the floating plate 502 contacts the bottom surface of the pay-off table 1, thereby adjusting the supporting force formed by the floating plate 502 on the pay-off table 1.

[0031] The wire-paying platform 1 comprises a wire-paying plate 101, a round table 102 and an intermediate support surface 103. A round table 102 with a larger top and a smaller bottom is installed at the bottom of the wire-paying plate 101. The bottom end surface of the round table 102 is the intermediate support surface 103, and the intermediate support surface 103 is a plane.

[0032] A truncated cone groove 202 corresponding to the truncated cone 102 is provided on the top surface of the pay-off seat 2 . The truncated cone groove 202 is a truncated cone-shaped groove that is larger at the top and smaller at the bottom. The middle of the bottom of the truncated cone groove 202 is also a plane structure corresponding to the middle support surface 103 .

[0033] The brake groove 401 is provided on the inclined surface of the truncated cone groove 202, and correspondingly, the brake block 402 is also in contact with the inclined surface of the truncated cone 102. Specifically, the inclined surface of the truncated cone 102 and the inclined surface of the brake block 402 are both curved surfaces.

[0034] The brake groove 401 here can be an annular groove, or it can be a Figure 5 The plurality of fan-shaped annular grooves are shown, and the plurality of fan-shaped annular grooves are connected through connecting holes 403.

[0035] The function of the truncated table 102 and the truncated table groove 202 is that, compared with the case of complete flat contact, a certain lateral restraint force is provided between the pay-off table 1 and the pay-off seat 2 during rotation, thereby reducing the lateral displacement between the pay-off table 1 and the pay-off seat 2 during rotation, and making the pay-off table 1 and the cable reel more stable during rotation.

[0036] An edge support surface 104 is reserved on the bottom surface of the wire-paying plate 101 at a position outside the truncated table 102. The edge support surface 104 is in a circular shape. The lifting mechanism 5 also includes a roller 504 located below the edge support surface 104. The roller 504 is installed on the floating plate 502. The roller 504 forms a rolling support for the edge support surface 104, which is used to increase the stability of the wire-paying table 1 during rotation, and reduce the resistance of the wire-paying table 1 during rotation.

[0037] The wire-paying seat 2 includes a seat body 201, and a roller groove 505 is processed at a position of the seat body 201 below the edge support surface 104. The roller groove 505 is a through groove connected up and down. A roller 504 is installed inside the roller groove 505, and a roller base 503 is installed at the bottom of the roller 504. The roller base 503 is fixedly installed on the floating plate 502. When the floating plate 502 moves upward under the support of hydraulic oil, the rollers 504 in the middle and edge of the floating plate 502 simultaneously lift the wire-paying platform 1 upward, and lift the wire-paying platform 1 from the middle and edge at the same time, so that the wire-paying platform 1 rotates more smoothly.

[0038] A bearing groove 204 is processed in the middle of the truncated cone groove 202. The bearing groove 204 is a through-hole structure connected up and down. A plane bearing 203 is installed inside the bearing groove 204. The top of the plane bearing 203 contacts the middle support surface 103, and the bottom of the plane bearing 203 is connected to the floating plate 502.

[0039] Among them, an intermediate support platform 508 is installed in the middle of the top of the floating plate 502, the intermediate support platform 508 is located on the inner side of the bearing groove 204, the plane bearing 203 is installed on the intermediate support platform 508, and a cylindrical structure is integrally formed in the middle of the top surface of the intermediate support platform 508. A gap is left between the inner wall of the plane bearing 203 and the cylindrical structure, and a gap is also left between the outer wall of the plane bearing 203 and the inner wall of the bearing groove 204. The top surface of the plane bearing 203 is used to support the intermediate support surface 103.

[0040] A driving box 3 is installed on one side of the pay-off seat 2, and the driving box 3 drives the brake mechanism 4 and the lifting mechanism 5 to adjust the friction between the brake mechanism 4 and the pay-off platform 1.

[0041] The driving box 3 includes a transmission box 302 and a ratchet wrench 301 for driving the transmission box 302. The transmission box 302 is connected to the brake mechanism 4 and the lifting mechanism 5. The ratchet wrench 301 is a two-way ratchet wrench. The ratchet wrench 301 is connected to the input end of the transmission box 302. When in use, the staff operates the ratchet wrench 301 to drive the brake mechanism 4 and the lifting mechanism 5 to operate through the transmission box 302. The transmission seat 303 is installed inside the transmission box 302. The transmission seat 303 is processed with a first hydraulic chamber 305 connected to the floating plate groove 501 and a second hydraulic chamber 307 connected to the brake groove 401. The first hydraulic chamber 305 and the second hydraulic chamber 307 are respectively located at two sides of the transmission seat 303. The first hydraulic chamber 305 is installed with a first piston 306 for adjusting the hydraulic pressure in the lower floating plate chamber 506. The second hydraulic chamber 307 is installed with a second piston for adjusting the hydraulic pressure in the brake groove 401. 311, the first piston 306 and the second piston 311 are both connected to the screw rod 304, the screw rod 304 is threadedly installed in the transmission seat 303, the screw rod 304 is connected to the ratchet wrench 301, and the screw rod 304 is driven to rotate by the ratchet wrench 301, which further drives the first piston 306 and the second piston 311 to move, and is used to adjust the hydraulic pressure in the brake groove 401 and the lower floating plate cavity 506, and further adjust the friction between the brake block 402 and the round table 102, and the supporting force of the floating plate 502 on the middle supporting surface 103.

[0042] Specifically, the first hydraulic chamber 305, the first piston 306, the second hydraulic chamber 307, and the second piston 311 are connected through the first hydraulic pipe, the second hydraulic chamber 305 and the lower floating plate chamber 506 are connected through the second hydraulic pipe, the second hydraulic chamber 307 and the brake groove 401 are connected through the second hydraulic pipe, the first hydraulic pipe and the first hydraulic chamber 305 are connected through the first connecting port 312, and the second hydraulic pipe and the second hydraulic chamber 307 are connected through the second connecting port 313. Fig.10 As shown, the first connection port 312 is located on the left side of the first piston 306, and the second connection port 313 is located on the right side of the second piston 311. In this way, when the screw 304 is turned to the left, the screw 304 drives the first piston 306 to squeeze the hydraulic oil in the first hydraulic chamber 305 and the lower floating plate chamber 506, so that the floating plate 502 lifts the pay-off platform 1 upward through the plane bearing 203, and lifts the pay-off platform 1 and the cable reel upward, reducing the friction between the pay-off platform 1 and the brake block 402. At the same time, the screw 304 drives the second piston 311 to release the hydraulic oil in the second hydraulic chamber 307 and the brake groove 401, so that the brake block 402 is displaced downward in the brake groove 401, further reducing the friction between the brake block 402 and the pay-off platform 1. Reverse operation can increase the friction between the brake block 402 and the pay-off platform 1.

[0043] With this arrangement, compared with adjusting the friction between the brake mechanism 4 and the pay-off platform 1 separately or adjusting the lifting mechanism 5 separately, adjusting the brake mechanism 4 and the lifting mechanism 5 simultaneously to adjust the friction between the brake mechanism 4 and the pay-off platform 1 is more obvious and faster.

[0044] The screw rod 304 is located between the first piston 306 and the second piston 311. The screw rod 304 is threadedly installed in the transmission seat 303. The first piston 306 and the second piston 311 are both rotatably installed with rotating blocks 310. The two ends of the screw rod 304 are respectively connected to the two rotating blocks 310, and the ends of the screw rod 304 are respectively rotatably connected to the first piston 306 and the second piston 311. At the same time, the two ends of the screw rod 304 are respectively sealed and connected to the first hydraulic chamber 305 and the second hydraulic chamber 307. The screw rod 304, the first piston 306, the rotating block 310, and the second piston 311 are coaxially arranged.

[0045] Here, a preferred situation is that in the axial direction of the screw 304, the cross-sectional area of ​​the first hydraulic chamber 305 is the same as that of the first piston 306, which is the first cross-sectional area, the cross-sectional area of ​​the second hydraulic chamber 307 is also the same as that of the second piston 311, which is the second cross-sectional area, the contact area between the hydraulic oil in the floating plate 502 and the lower floating plate chamber 506 is the third cross-sectional area, the contact area between the brake block 402 and the table 102 is the fourth cross-sectional area, and the proportional relationship between the first cross-sectional area and the second cross-sectional area is related to the ratio of the third cross-sectional area to the fourth cross-sectional area, so that when the first piston 306 and the second piston 311 move synchronously, the distance that the floating plate 502 moves upward is proportional to the distance that the brake block 402 moves downward.

[0046] Regarding the screw 304, the screw 304 includes a cylindrical body 318 and a screw thread 319, and the screw thread 319 is a trapezoidal screw thread, such as Fig.12 As shown, the screw thread 319 includes an upper base 314, a lower base 315, a trapezoidal height 316 and a pitch 317, wherein the ratio between the upper base 314 and the lower base 315 is between 1:1.1-1:1.2, and the ratio between the lower base 315 and the trapezoidal height 316 is between 1:3-1:3.5, and the thread lead angle of the screw 304 is smaller than the standard thread lead angle (the pitch 317 is also smaller than the standard pitch), so that during the rotation of the screw 304, the friction between the screw thread 319 and the transmission seat 303 is increased, and at the same time the feeding accuracy of the screw 304 is improved.

[0047] A transmission mechanism 6 is installed between the screw 304 and the ratchet wrench 301. The transmission mechanism 6 includes a first gear 601 installed on the screw 304, a reduction gear 605 meshing with the first gear 601, and a worm gear structure connected to the reduction gear 605. The first gear 601 is coaxially arranged with the cylinder 318, and the first gear 601 is installed in the middle position of the cylinder 318.

[0048] The reduction gear 605 consists of a large gear 603 and a small gear 602. The specifications of the first gear 601 are similar to those of the large gear 603, and the worm gear structure includes a worm wheel 604 and a worm 308. There is also a small gear 602 coaxially installed with the worm wheel 604. The small gear 602 is meshed with the large gear 603 on the reduction gear 605, and the small gear 602 on the reduction gear 605 is meshed with the first gear 601 to perform reduction transmission.

[0049] It should be noted that, in addition to the above-mentioned deceleration mechanism, the transmission mechanism 6 can also combine the small gear 602 and the large gear 603 into an acceleration gear set mechanism. The specific selection condition is to refer to the ratio of the cross-sectional area between the floating plate 502 and the first piston 306, and the brake block 402 and the second piston 311. If the ratio is close (the cross-sectional area of ​​the floating plate 502 and the first piston 306, and the brake block 402 and the second piston 311 are close), the transmission mechanism 6 with a deceleration transmission effect is selected. If the ratio is greatly different, the transmission mechanism 6 with an acceleration transmission effect is selected. The selection can be made according to specific needs.

[0050] During the rising process of the lifting mechanism 5, the relationship between the brake mechanism 4, the lifting mechanism 5 and the pay-off platform 1 changes in three stages. Specifically, before the lifting mechanism 5 contacts the pay-off platform 1, the pay-off platform 1 and the cable reel are pressed on the brake mechanism 4, and the pay-off platform 1 and the cable reel cannot rotate by dragging the cable; after the lifting mechanism 5 contacts the pay-off platform 1 and before the pay-off platform 1 is separated from the brake mechanism 4, the upward supporting force of the lifting mechanism 5 on the pay-off platform 1 becomes greater and greater, while the pressure of the pay-off platform 1 and the cable reel on the brake mechanism 4 becomes smaller and smaller until the pay-off platform 1 is separated from the brake mechanism 4; after the pay-off platform 1 is separated from the brake mechanism 4, the weight of the pay-off platform 1 and the cable reel is pressed on the lifting mechanism 5, which is supported by the plane bearing 203 and the roller 504, has a small rotation resistance, and is very easy to rotate.

[0051] Because when adjusting the friction between the pay-off platform 1 and the brake mechanism 4, the height that the lifting mechanism 5 needs to continue to move up after contacting the pay-off platform 1 is very small, so after the transmission mechanism 6 performs deceleration transmission, the movement transmitted from the ratchet wrench 301 to the screw 304 is very small, and the movement of the screw 304 and the lifting mechanism 5 is also very small. The force transmitted from the screw 304 to the hydraulic oil, and the force transmitted from the hydraulic oil to the floating plate 502, are partly from the elastic force formed by the micro-deformation of the screw thread 319 and the floating plate 502.

[0052] The ratchet wrench 301 is connected to the input end of the worm gear structure. The input end of the worm gear structure is the end of the worm 308 away from the wire-paying seat 2. A hexagonal nut 309 is installed at the end of the worm 308. When in use, the hexagonal wrench on the ratchet wrench 301 screws the worm 308 through the hexagonal nut 309, further driving the transmission mechanism 6, driving the screw 304 to rotate, thereby moving the brake mechanism 4 and the lifting mechanism 5.

[0053] Working principle: When in use, place the cable reel upright on the pay-off platform 1, pass the middle vertical rod 7 through the through hole in the center of the cable reel, use the cable reel's own weight to press on the pay-off platform, and press the pay-off platform 1 tightly against the brake mechanism. In the initial state, the top of the brake block 402 fits tightly with the inclined surface of the round table 102, and the pay-off platform 1 is pressed on the brake mechanism 4. At the same time, there is a gap between the middle support surface 103 and the plane bearing 203, and the same gap is also left between the roller 504 and the edge support surface 104. At this time, the cable reel relies on its own weight to press on the brake mechanism 4 together with the pay-off platform 1 and cannot rotate.

[0054] Then operate the ratchet wrench 301 to drive the brake mechanism 4 and the lifting mechanism 5 to move through the transmission mechanism 6, so that the brake block 402 moves downward and the floating plate 502 moves upward. When the top of the plane bearing 203 contacts the middle support surface 103 and the roller 504 contacts the edge support surface 104, the floating plate 502 begins to lift the pay-off platform 1 and the cable reel upward, reducing the pressure of the pay-off platform 1 and the cable reel on the brake mechanism 4. According to the friction formula F=μ×Fn, when the friction coefficient remains unchanged, when the pressure decreases, the friction decreases, so that the cable reel and the pay-off platform 1 slowly begin to rotate, and the rotation speed can be adjusted as needed.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cable pay-off device for municipal construction, comprising a pay-off platform (1) for mounting a cable drum, the pay-off platform (1) being mounted on a pay-off seat (2), the pay-off platform (1) being provided with an intermediate vertical pole (7), characterized in that: A brake mechanism (4) and a lifting mechanism (5) are provided inside the pay-off seat (2); the brake mechanism (4) is located between the pay-off platform (1) and the pay-off seat (2); and the friction force between the pay-off platform (1) and the brake mechanism (4) is adjusted by the lifting mechanism (5).

2. A cable laying device for municipal construction construction according to claim 1, characterized in that: The brake mechanism (4) comprises a brake groove (401) formed on the top surface of the wire pay-off seat (2); a brake block (402) is sealed and installed on the upper part of the brake groove (401); the brake block (402) is movably installed in the brake groove (401); and the lower part of the brake groove (401) is filled with hydraulic oil for driving the brake block (402) to move.

3. A cable laying device for municipal construction construction according to claim 2, characterized in that: A lifting mechanism (5) is provided below the brake mechanism (4), the lifting mechanism (5) comprising a floating plate groove (501) provided inside the pay-off seat (2), a floating plate (502) being movably mounted inside the floating plate groove (501), the floating plate (502) dividing the floating plate groove (501) into an upper floating plate cavity (507) located at the upper part and a lower floating plate cavity (506) located at the lower part, the interior of the lower floating plate cavity (506) being filled with hydraulic oil for driving the floating plate (502) to move, and the top of the floating plate (502) is in contact with the bottom surface of the pay-off platform (1).

4. A cable laying device for municipal construction construction according to claim 3, characterized in that: The wire-paying platform (1) comprises a wire-paying plate (101), a round platform (102), and an intermediate support surface (103); a round platform (102) with a larger top and a smaller bottom is provided at the bottom of the wire-paying plate (101); and a bottom end surface of the round platform (102) serves as the intermediate support surface (103); The top surface of the pay-off seat (2) is provided with a truncated cone groove (202) corresponding to the truncated cone (102), and the brake groove (401) is provided on the inclined surface of the truncated cone groove (202).

5. A cable laying device for municipal construction according to claim 4, characterized in that: The pay-off plate (101) is provided with an edge support surface (104) at a position outside the truncated table (102), and the lifting mechanism (5) further comprises a roller (504) located below the edge support surface (104), and the roller (504) is mounted on the floating plate (502).

6. A cable laying device for municipal construction according to claim 5, characterized in that: The pay-off seat (2) is provided with a roller groove (505) at a position below the edge support surface (104), a roller (504) is arranged inside the roller groove (505), a roller base (503) is arranged at the bottom of the roller (504), and the roller base (503) is fixedly mounted on the floating plate (502).

7. A cable laying device for municipal construction according to claim 6, characterized in that: A bearing groove (204) is arranged in the middle of the truncated cone groove (202), a plane bearing (203) is arranged inside the bearing groove (204), the top of the plane bearing (203) is in contact with the middle support surface (103), and the bottom of the plane bearing (203) is connected to the floating plate (502).

8. A cable laying device for municipal construction according to claim 6, characterized in that: A drive box (3) is provided on one side of the pay-off seat (2), and the drive box (3) comprises a transmission box (302) and a ratchet wrench (301) for driving the transmission box (302); A transmission seat (303) is arranged inside the transmission box (302); a first hydraulic chamber (305) communicating with the floating plate groove (501) and a second hydraulic chamber (307) communicating with the brake groove (401) are arranged inside the transmission seat (303); a first piston (306) for adjusting the hydraulic pressure is arranged inside the first hydraulic chamber (305); a second piston (311) for adjusting the hydraulic pressure is arranged inside the second hydraulic chamber (307); the first piston (306) and the second piston (311) are both connected to the screw rod (304); and the screw rod (304) is connected to the ratchet wrench (301).

9. A cable laying device for municipal construction according to claim 8, characterized in that: The screw rod (304) is located between the first piston (306) and the second piston (311); a rotating block (310) is rotatably arranged inside the first piston (306) and the second piston (311); two ends of the screw rod (304) are respectively connected to the two rotating blocks (310); the screw rod (304), the first piston (306), the rotating block (310), and the second piston (311) are coaxially arranged.

10. A cable laying device for municipal construction according to claim 9, characterized in that: A transmission mechanism (6) is provided between the screw rod (304) and the ratchet wrench (301), the transmission mechanism (6) comprising a first gear (601) mounted on the screw rod (304), a reduction gear (605) meshing with the first gear (601), and a worm gear structure connected to the reduction gear (605), and the ratchet wrench (301) is connected to an input end of the worm gear structure.

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