A power plant electrical engineering cable stay construction tool

Abstract

The present application relates to the technical field of cable traction, and particularly relates to a power plant electrical engineering cable stay construction tool. The tool comprises a shell, two driving rings which are both slidingly and rotatably connected in the shell, an inner rotating ring which is rotatably connected to one of the driving rings, a cable net which is fixed to the shell, and a fastener which is fixed between the two driving rings. The two driving rings respectively drive the two sides of the fastener to move, so that the diameter of the circle in which the axis of the fastener is located gradually decreases, the cable net is subjected to a circumferential clamping force, the clamping force of the cable net on the cable is further strengthened, the stable state between the cable net and the cable is maintained, the probability of relative sliding between the cable net and the cable is reduced, and the efficiency of pulling the cable is ensured, and the abrasion of the cable skin is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable traction, in particular to a cable pulling construction tool for power plant electrical engineering. BACKGROUND

[0002] Power plant electrical engineering refers to comprehensive engineering technology related to power generation, transmission, distribution, and use in power plants, covering the entire process from power generation to power use, among which cable pulling is a common and important work for laying and installing various types of cables. Common cable pulling tools include cable net, cable clamp, and manual winch.

[0003] In the process of using the cable net to pull the cable, the steel wires of the net gradually tighten to form a firm gripping force, and the traction force of the net is distributed to the outer surface of the cable. During the pulling process, if the applied pulling force exceeds the rated carrying capacity of the net, or the performance of the net is reduced due to other factors (such as material fatigue, environmental impact, etc.), the net will stretch and deform, causing the friction between the net and the cable to decrease, resulting in relative sliding between the two, which causes the traction force of the net to not be fully transmitted to the cable, not only reducing the pulling efficiency, but also causing the cable outer skin to wear and the internal conductor to be damaged, and even causing construction accidents. SUMMARY

[0004] In order to overcome the shortcoming that the existing cable net will slide relative to the cable during use, the present application provides a cable pulling construction tool for power plant electrical engineering.

[0005] The technical solution of the present application is a cable pulling construction tool for power plant electrical engineering, which comprises:

[0006] a sleeve shell;

[0007] two driving rings, each slidingly and rotatably connected to the sleeve shell;

[0008] an inner rotating ring rotatably connected to one of the driving rings, a pulling rope being fixed between the inner rotating ring and the sleeve shell;

[0009] a cable net fixed to one side of the sleeve shell near the inner rotating ring;

[0010] a fastener fixed between the two driving rings for fixing the cable net;

[0011] a transmission assembly arranged between the two driving rings for relative movement of the two driving rings.

[0012] As a further preferred embodiment, the fastener is made of memory metal and has a spiral shape.

[0013] As a further preferred aspect, the transmission assembly comprises:

[0014] A fixed ring is rotatably connected to the adjacent driving ring, and a driving rack is fixedly connected to the fixed ring. The two driving racks are centrally symmetrically distributed, and the driving rack is in sliding connection with the outer shell.

[0015] A transmission gear is rotatably connected to the outer shell, and the driving rack is in meshing connection with the transmission gear.

[0016] As a further preferred aspect, a limiting pin is in sliding connection with the driving ring near the pull rope, and the limiting pin penetrates the outer shell.

[0017] As a further preferred aspect, a convex ball is fixedly connected to the driving ring, and the outer shell is provided with two spiral grooves with the same spiral direction, and the convex ball is in sliding connection with the adjacent spiral grooves.

[0018] As a further preferred aspect, the outer shell is fixedly connected with two limiting rings, and the two driving rings are located between the two limiting rings. The limiting ring is used for limiting the adjacent driving ring.

[0019] As a further preferred aspect, it further comprises:

[0020] A secondary fixing mechanism is arranged in the outer shell and is used for clamping the cable. The secondary fixing mechanism comprises:

[0021] A wrapping sleeve is fixedly connected to the cable net away from the side of the pull rope;

[0022] A fixed plate is fixedly connected to the outer shell;

[0023] A follower ring is rotatably connected to the fixed plate and is fixedly connected to the wrapping sleeve.

[0024] As a further preferred aspect, the diameter of the circle in the axis direction of the fastener is greater than the diameter of the circle in the axis direction of the wrapping sleeve.

[0025] As a further preferred aspect, the wrapping sleeve is made of flexible material, and the inner side thereof is provided with a rough surface.

[0026] As a further preferred aspect, the driving ring near the fixed plate is fixedly connected with a spacer distributed elastic push rod, and the extension end of the elastic push rod is fixedly connected with the follower ring.

[0027] The beneficial effects of the present application are: 1. The present application drives the two sides of the fastener to move backward respectively through two driving rings, and drives the two sides of the fastener to rotate respectively, so that the diameter of the circle in which the fastener axis direction is located gradually decreases, the fastener tightly wraps the cable net cover, and exerts a circumferential clamping force on the cable net cover, so that the cable net cover further strengthens the clamping force on the cable, maintains the stable state between the cable net cover and the cable, reduces the probability of relative sliding between the cable net cover and the cable, and further ensures the efficiency of pulling the cable and reduces the occurrence of cable outer skin abrasion.

[0028] 2. The present application detects the tension of the pull rope through the self properties of the limiting pin, and when the tension reaches the limit value that the limiting pin can bear, the limiting pin breaks, and further causes the driving ring to move, thereby reducing the probability of deformation of the cable net cover due to bearing excessive pressure.

[0029] 3. The present application drives one side of the wrapping cover to rotate through the elastic push rod, so that the wrapping cover gradually deforms into a spiral state and exerts a circumferential clamping force on the cable, realizes the fixation of the cable, forms a whole with the cable, so as to fix the cable net cover by the wrapping cover, further reduces the probability of relative sliding between the cable net cover and the cable, and ensures the efficiency of pulling the cable, and utilizes the characteristics of the wrapping cover being flexible material to reduce the probability of damage to the cable outer skin by the wrapping cover, and ensures the integrity of the cable outer skin. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0031] Figure 2 It is a sectional view of the three-dimensional structure of the outer shell of the present application;

[0032] Figure 3 It is a schematic diagram of the three-dimensional structure of the inner parts in the outer shell of the present application;

[0033] Figure 4 It is a schematic diagram of the three-dimensional structure of the driving ring, the inner rotating ring and the pull rope of the present application;

[0034] Figure 5 It is a schematic diagram of the three-dimensional structure of the fastener of the present application;

[0035] Figure 6 It is a schematic diagram of the three-dimensional structure of the driving rack and the transmission gear of the present application;

[0036] Figure 7 It is a schematic diagram of the three-dimensional structure of the spiral groove of the present application;

[0037] Figure 8 It is a schematic diagram of the three-dimensional structure of the elastic push rod of the present application.

[0038] Marked in the drawing: 1-outer shell, 101-helical groove, 2-driving ring, 3-inner rotating ring, 4-pull rope, 5-cable net cover, 6-fastener, 21-fixing ring, 22-driving rack, 23-driving gear, 31-limiting pin, 41-convex ball, 51-limiting ring, 61-wrapping cover, 62-fixing plate, 63-follower ring, 71-elastic push rod. DETAILED DESCRIPTION

[0039] Embodiments of the present application are described below with reference to the accompanying drawings.

[0040] Example 1: A power plant electrical engineering cable stay construction tool, comparison Figures 1-5 As shown, it comprises an outer shell 1; two driving rings 2, both slidingly and rotatably connected in the outer shell 1; an inner rotating ring 3 rotatably connected to one of the driving rings 2, a pull rope 4 fixed between the inner rotating ring 3 and the outer shell 1; a cable net cover 5 fixed to one side of the outer shell 1 near the inner rotating ring 3; a fastener 6 fixed between the two driving rings 2 for fixing the cable net cover 5; a transmission assembly arranged between the two driving rings 2 for relative movement of the two driving rings 2; the fastener 6 is made of memory metal and is helical.

[0041] In the above scheme, a way of reinforcing the cable net cover 5 is proposed to reduce the probability of relative movement between the cable net cover 5 and the cable; the inner rotating ring 3 is located in the left driving ring 2; in this scheme, the middle part of the pull rope 4 is connected with the external traction equipment; the cable net cover 5 is of existing structure; by driving the two sides of the fastener 6 to rotate in opposite directions and stretching it, the diameter of the circle in the axial direction of the fastener 6 is reduced, and the cable net cover 5 is clamped.

[0042] Comparison Figures 3-6 As shown, the transmission assembly comprises: two fixing rings 21, each rotatably connected to an adjacent driving ring 2, the fixing ring 21 is fixed with a driving rack 22, the driving rack 22 is slidingly connected with the outer shell 1, and the two driving racks 22 are centrally symmetrically distributed; a driving gear 23 rotatably connected in the outer shell 1, the driving rack 22 is engaged with the driving gear 23.

[0043] In the above scheme, a way of jointly driving the two driving rings 2 to move is proposed, so that the two driving rings 2 move towards or away from each other, the two fixing rings 21 are located on the opposite sides of the two driving rings 2, the inner wall of the outer shell 1 is provided with two sliding grooves, the driving rack 22 is located in the adjacent sliding groove and slides, which ensures the stability of the movement of the driving rack 22; the upper side of the driving gear 23 is provided with a knob, which is convenient for the operator to drive the driving gear 23 to rotate.

[0044] Comparison Figures 2-8As shown, the driving ring 2 close to the pull rope 4 is slidingly connected with a limiting pin 31, the limiting pin 31 penetrates the outer shell 1; the driving ring 2 is fixedly connected with a convex ball 41, the outer shell 1 is provided with two spiral grooves 101, the spiral directions of the two spiral grooves 101 are same, the convex ball 41 is located in the adjacent spiral groove 101 and slides; the outer shell 1 is fixedly connected with two limiting rings 51, the two driving rings 2 are located between the two limiting rings 51, the limiting ring 51 is used for limiting the adjacent driving ring 2.

[0045] In the above scheme, the limiting pin 31 is located on the left driving ring 2, the limiting pin 31 is an existing pin, which is used for limiting the left driving ring 2, and at the same time, the limiting pin 31 acts as a safety shearing element; when the pull rope 4 applies a pulling force to the driving ring 2 through the inner rotating ring 3 and the pulling force reaches a certain set value, the limiting pin 31 breaks under the action of shearing force; in the process of the convex ball 41 sliding in the spiral groove 101, the convex ball 41 drives the driving ring 2 to rotate; the limiting ring 51 limits the driving ring 2, avoiding that the driving ring 2 moves too long to cause the extrusion force of the fastener 6 on the cable mesh sleeve 5 and the cable to be too large, and thus causing the cable mesh sleeve 5 and the cable to deform; in the scheme, the installation position of the limiting ring 51 can be adjusted to adapt to different types of cables.

[0046] Working principle: when the device is used to pull the cable, the cable is first inserted into the cable mesh sleeve 5, and the pull rope 4 is connected with an external traction device, then the traction device is started, the traction device starts to pull the pull rope 4, the pull rope 4 applies a pulling force to the outer shell 1 and the inner rotating ring 3 together, at this time, since the limiting pin 31 limits the left driving ring 2, the inner rotating ring 3 cannot move, the outer shell 1 applies a pulling force to the cable mesh sleeve 5, the cable mesh sleeve 5 starts to deform and wrap the periphery of the cable, the pulling force of the cable mesh sleeve 5 is evenly distributed to the outer peripheral surface of the cable, thus starting to pull the cable.

[0047] In the process of pulling the cable, the pull rope 4 applies a force to the left driving ring 2 through the inner rotating ring 3, the left driving ring 2 applies a force to the outer shell 1 through the limiting pin 31, at this time, the left driving ring 2 and the outer shell 1 apply a shearing force to the limiting pin 31.

[0048] In the process of pulling the cable, as the length of the cable being pulled gradually increases, the moving resistance of the cable gradually increases, that is, the pulling force of the traction device relative to the cable should also gradually increase to ensure the pulling efficiency of the cable, as the pulling force gradually increases, the shearing force applied by the left driving ring 2 and the outer shell 1 to the limiting pin 31 gradually increases, until the shearing force exceeds the limit value that the limiting pin 31 can bear, the limiting pin 31 breaks.

[0049] After the limit pin 31 is broken, the pull rope 4 drives the left side driving ring 2 to move left through the inner rotating ring 3, the left side driving ring 2 drives the left side fixed ring 21 to move, the left side fixed ring 21 drives the rear side driving rack 22 to move, the rear side driving rack 22 drives the front side driving rack 22 to move through the transmission gear 23, and the front side driving rack 22 drives the right side driving ring 2 to move right. In this process, the two driving rings 2 move away from each other, and the two driving rings 2 drive the two sides of the fastener 6 to move away from each other.

[0050] In the process of moving away from each other, the driving ring 2 drives the convex ball 41 on it to move, and the convex ball 41 slides along the adjacent spiral groove 101, that is, the convex ball 41 drives the adjacent driving ring 2 to move, the driving ring 2 rotates relative to the adjacent fixed ring 21, and the left side driving ring 2 rotates relative to the inner rotating ring 3. Since the spiral directions of the two spiral grooves 101 are the same, the rotating directions of the two driving rings 2 are opposite, and the two driving rings 2 drive the two sides of the fastener 6 to rotate in opposite directions.

[0051] In summary, the fastener 6 is subjected to tension and tightening force at the same time. In this process, the fastener 6 gradually expands along its axis direction, and the diameter of the circle in which the axis direction is located gradually decreases. The fastener 6 gradually deforms towards the axis direction of the cable, until the fastener 6 contacts the cable mesh 5. The two driving rings 2 continue to move and gradually apply force to the fastener 6, so that the fastener 6 tightly wraps the cable mesh 5 and applies a circumferential clamping force to the cable mesh 5, so that the cable mesh 5 further strengthens the clamping force on the cable. With the movement of the driving ring 2, the clamping force of the fastener 6 on the cable mesh 5 gradually increases, thereby maintaining the stable state between the cable mesh 5 and the cable, reducing the probability of relative sliding between the cable mesh 5 and the cable, and thereby ensuring the efficiency of pulling the cable and reducing the occurrence of cable outer skin abrasion.

[0052] With the movement of the driving ring 2, when the driving ring 2 contacts the limit ring 51, the limit ring 51 limits the movement of the driving ring 2, so that the driving ring 2 cannot continue to move, that is, the fastener 6 no longer deforms, and the driving ring 2 and the outer shell 1 form an integral whole. In this process, the fastener 6 and the cable mesh 5 continue to pull the cable together until the cable is pulled to the specified position, and the pulling work is completed.

[0053] After the pulling work is finished, the operator disconnects the pull rope 4 from the traction device, reversely rotates the transmission gear 23, moves the two driving racks 22 in opposite directions, and drives the active rings 2 to reset through the adjacent fixed rings 21. During the process, the two active rings 2 reversely rotate and approach each other, so that the fastener 6 returns to the original state. Then, the operator expands the cable net cover 5 and takes out the cable. After the two active rings 2 reset, the operator inserts the new limiting pin 31 into the outer shell 1 and limits the left active ring 2, thus ending the use of the device.

[0054] Embodiment 2: Based on embodiment 1, as shown in Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 8 , further comprising: a secondary fixing mechanism arranged in the outer shell 1 and used for clamping the cable, the secondary fixing mechanism comprising: a wrapping sleeve 61 fixed to the side of the cable net cover 5 away from the pull rope 4; a fixed plate 62 fixed in the outer shell 1; a follower ring 63 rotationally connected to the fixed plate 62 and fixed to the wrapping sleeve 61; the diameter of the circle in the axis direction of the fastener 6 is greater than the diameter of the circle in the axis direction of the wrapping sleeve 61; the wrapping sleeve 61 is made of flexible material, and the inner side thereof is provided with a rough surface.

[0055] In the above scheme, a way of fixing the cable and pulling the cable net cover 5 is proposed, which reduces the probability of relative movement between the cable net cover 5 and the cable; the wrapping sleeve 61 is made of soft and deformable material, such as rubber material, which increases the friction between the wrapping sleeve 61 and the cable; the wrapping sleeve 61 is connected with the cable net cover 5 through a hard circular ring, which is used to support the wrapping sleeve 61, so as to achieve the effect that the wrapping sleeve 61 does not contact the cable at the beginning.

[0056] As shown in Figure 3 、 Figure 5 、 Figure 6 and Figure 8 , the right active ring 2 is fixed with two elastic push rods 71 distributed at intervals, the elastic push rods 71 are used to drive the right active ring 2 to reset, the extension end of the elastic push rod 71 is fixed to the follower ring 63, and the elastic push rod 71 transmits the rotating force of the right active ring 2 to the follower ring 63.

[0057] Working principle: in the process of moving right of the right side of the active ring 2, the right side of the active ring 2 drives the elastic push rod 71 on it to move right, the elastic push rod 71 gradually shrinks and starts to store energy, in this process, the right side of the active ring 2 drives the elastic push rod 71 to rotate circumferentially, the stretching end of the elastic push rod 71 drives the driven ring 63 to rotate, and the driven ring 63 drives the right side of the wrapping sleeve 61 to rotate, the left side of the wrapping sleeve 61 cannot rotate under the action of the cable net sleeve 5, with the rotation of the right side of the wrapping sleeve 61, the wrapping sleeve 61 gradually deforms into a spiral state and tightens to the axis direction, until the inside of the wrapping sleeve 61 is in close contact with the cable, the wrapping sleeve 61 continues to be tightened, that is, the wrapping sleeve 61 exerts a circumferential clamping force on the cable, at the same time, the inside of the wrapping sleeve 61 is rough, which ensures the relative position between the two, with the gradual shrinkage of the wrapping sleeve 61, the force exerted by the wrapping sleeve 61 on the cable gradually increases, realizing the fixation of the cable, so that the wrapping sleeve 61 and the cable form an integral whole, thereby fixing the cable net sleeve 5, further reducing the probability of relative sliding between the cable net sleeve 5 and the cable, and because the wrapping sleeve 61 is made of flexible material, the probability of abrasion of the cable outer skin is reduced.

[0058] In the process of pulling the wrapping sleeve 61 by the cable net sleeve 5, when the wrapping sleeve 61 tightly wraps the cable, the cable net sleeve 5 pulls the cable through the wrapping sleeve 61, ensuring the smooth progress of the pulling work and the efficiency of pulling the cable.

[0059] In the process of moving right of the right side of the active ring 2, the right side of the fastener 6 gradually moves right and moves to the outer circumferential side of the wrapping sleeve 61, and in the process of shrinking of the fastener 6, the right side of the fastener 6 gradually wraps the wrapping sleeve 61, which further enhances the clamping force of the wrapping sleeve 61 on the cable, ensures the stable state between the wrapping sleeve 61 and the cable, and reduces the probability of relative movement between the wrapping sleeve 61 and the cable.

[0060] After the pulling work is completed, the operator disconnects the pull rope 4 from the external traction device, the elastic push rod 71 restores to its original state under the action of its own elasticity and pushes the right side of the active ring 2 to move left to reset, the right side of the active ring 2 drives the left side of the active ring 2 to reset through the two drive racks 22 and the transmission gear 23, and the resetting process of embodiment 1 is continued.

[0061] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that changes can be made in these embodiments without departing from the principles and spirit of the present application.

Claims

1. A cable pulling tool for power plant electrical engineering, characterized in that, Including: Outer shell (1); Two active rings (2) are slidably and rotatably connected inside the outer shell (1); The inner rotating ring (3) is rotatably connected to one of the active rings (2), and a pull rope (4) is fixed between the inner rotating ring (3) and the outer shell (1). The cable mesh sleeve (5) is fixed to the outer shell (1) on the side near the inner swivel (3); Fastener (6) is fixed between the two active rings (2) for fixing the cable mesh sleeve (5); A transmission assembly is disposed between the two drive rings (2) for moving the two drive rings (2) relative to each other; The fastener (6) is made of shape memory metal and is spiral-shaped; The transmission assembly includes: There are two fixed rings (21), which are rotatably connected to the adjacent active rings (2). A drive rack (22) is fixedly connected to the fixed ring (21). The two drive racks (22) are centrally symmetrically distributed. The drive racks (22) are slidably connected to the outer shell (1). The transmission gear (23) is rotatably connected inside the outer casing (1), and the drive rack (22) meshes with the transmission gear (23).

2. The cable pulling tool for power plant electrical engineering according to claim 1, characterized in that, The active ring (2) near the pull cord (4) is slidably connected to a limiting pin (31), which penetrates the outer shell (1).

3. The cable pulling tool for power plant electrical engineering according to claim 2, characterized in that, A convex ball (41) is fixedly attached to the active ring (2), and the outer shell (1) is provided with two spiral grooves (101). The spiral directions of the two spiral grooves (101) are the same, and the convex ball (41) slides in the adjacent spiral grooves (101).

4. The cable pulling tool for power plant electrical engineering according to claim 3, characterized in that, The outer shell (1) is fixed with two limiting rings (51), and the two active rings (2) are located between the two limiting rings (51). The limiting rings (51) are used to limit the adjacent active rings (2).

5. The cable pulling tool for power plant electrical engineering according to claim 4, characterized in that, It also includes: A secondary fixing mechanism, located inside the outer casing (1), is used to tighten the cable. The secondary fixing mechanism includes: The wrapping sleeve (61) is fixed to the side of the cable mesh sleeve (5) away from the pull rope (4); The fixing plate (62) is fixed inside the outer shell (1); The follower ring (63) is rotatably connected to the fixed plate (62) and fixedly connected to the wrapping sleeve (61).

6. The cable pulling tool for power plant electrical engineering according to claim 5, characterized in that, The diameter of the circle on the axis of the fastener (6) is greater than the diameter of the circle on the axis of the sleeve (61).

7. A cable pulling tool for power plant electrical engineering according to claim 6, characterized in that, The wrapping sleeve (61) is made of flexible material, and its inner surface is roughened.

8. A cable pulling tool for power plant electrical engineering according to claim 7, characterized in that, The active ring (2) near the fixed plate (62) is fixedly connected with spaced elastic push rods (71), and the telescopic end of the elastic push rod (71) is fixedly connected to the follower ring (63).

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