Power plant electrical engineering cable stay wire construction tool

Abstract

The invention relates to the technical field of cable traction, in particular to a power plant electrical engineering cable stay wire construction tool. Comprising an outer sleeve shell; the two driving rings are both connected into the outer sleeve shell in a sliding and rotating mode; the inner rotating ring is rotationally connected to one of the driving rings, and a pull rope is fixedly connected between the inner rotating ring and the outer sleeve shell; the cable net sleeve is fixedly connected to the outer sleeve shell; and the fastener is fixedly connected between the two driving rings. The two driving rings drive the two sides of the fastener to move respectively, so that the diameter of the circle where the fastener is located in the axis direction is gradually reduced, circumferential clamping force is applied to the cable net sleeve, the clamping force of the cable net sleeve to a cable is further enhanced, the stable state between the cable net sleeve and the cable is kept, and the cable net sleeve is prevented from being damaged. And the probability of relative sliding between the cable net sleeve and the cable is reduced, so that the cable pulling efficiency is ensured, and the situation that the sheath of the cable is abraded is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cable traction, and particularly to a cable pulling construction tool for power plant electrical engineering. Background Art

[0002] Power plant electrical engineering refers to the comprehensive engineering technology involving power generation, transmission, distribution, and use in a power plant, covering the entire process from power generation to power consumption. Among them, cable pulling is a common and important task for laying and installing various types of cables. Common cable pulling tools include cable mesh sleeves, cable clamps, manual winches, etc.

[0003] During the process of using a cable mesh sleeve to pull a cable, the steel wires of the mesh sleeve gradually tighten to form a firm gripping force, and the traction force received by the mesh sleeve is distributed to the outer peripheral surface of the cable. During the pulling process, if the applied pulling force exceeds the rated load-bearing capacity of the mesh sleeve, or if the performance of the mesh sleeve decreases due to other factors (such as material fatigue, environmental impact, etc.), the mesh sleeve will undergo tensile deformation, resulting in a decrease in the frictional force between it and the cable, thereby causing relative sliding between the two, making it impossible for the traction force of the mesh sleeve to be fully transmitted to the cable. This not only reduces the pulling efficiency but also causes wear on the cable outer skin, damage to the internal conductors, and even leads to construction accidents. Summary of the Invention

[0004] In order to overcome the drawback that the existing cable mesh sleeve will undergo relative sliding with the cable during use, the present invention provides a cable pulling construction tool for power plant electrical engineering.

[0005] The technical solution of the present invention: A cable pulling construction tool for power plant electrical engineering, comprising: An outer shell; Two active rings, both slidingly and rotatably connected within the outer shell; An inner rotating ring, rotatably connected to one of the active rings, and a pulling rope is fixedly connected between the inner rotating ring and the outer shell; A cable mesh sleeve, fixedly connected to one side of the outer shell close to the inner rotating ring; A fastener, fixedly connected between the two active rings for fixing the cable mesh sleeve; A transmission assembly, arranged between the two active rings for causing the two active rings to move relative to each other.

[0006] As a further preferred solution, the fastener is made of shape memory metal and is spiral-shaped.

[0007] As a further preferred solution, the transmission assembly includes: Fixed rings, there are two of them, respectively rotatably connected to the adjacent active rings. A driving rack is fixedly connected to the fixed rings. The two driving racks are symmetrically distributed about the center. The driving rack is slidably connected to the outer casing; A transmission gear is rotatably connected inside the outer casing. The driving rack meshes with the transmission gear.

[0008] As a further preferred solution, a limit pin is slidably connected to the active ring near the pull rope. The limit pin penetrates through the outer casing.

[0009] As a further preferred solution, a convex ball is fixedly connected to the active ring. The outer casing is provided with two spiral grooves. The spiral directions of the two spiral grooves are the same. The convex ball slides in the adjacent spiral grooves.

[0010] As a further preferred solution, the outer casing is fixedly connected with two limit rings. The two active rings are located between the two limit rings. The limit rings are used to limit the adjacent active rings.

[0011] As a further preferred solution, it further includes: A secondary fixing mechanism is arranged inside the outer casing and is used to tighten the cable. The secondary fixing mechanism includes: A wrapping sleeve is fixedly connected to the side of the cable mesh sleeve away from the pull rope; A fixing plate is fixedly connected inside the outer casing; A follower ring is rotatably connected to the fixing plate and is fixedly connected to the wrapping sleeve.

[0012] As a further preferred solution, the diameter of the circle where the axis of the fastener is located is greater than the diameter of the circle where the axis of the wrapping sleeve is located.

[0013] As a further preferred solution, the wrapping sleeve is made of a flexible material, and its inner side is set as a rough surface.

[0014] As a further preferred solution, elastic push rods are fixedly connected to the active ring near the fixing plate at intervals. The telescopic ends of the elastic push rods are fixedly connected to the follower ring.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention drives the two sides of the fastener to move away from each other through two active rings, and at the same time drives the two sides of the fastener to rotate respectively, so that the diameter of the circle where the fastener is located in the axial direction gradually decreases. The fastener tightly wraps the cable sleeve and applies a circumferential clamping force to the cable sleeve, further strengthening the clamping force of the cable sleeve on the cable, maintaining the stable state between the cable sleeve and the cable, reducing the probability of relative sliding between the cable sleeve and the cable, and thus ensuring the efficiency of pulling the cable and reducing the occurrence of wear on the cable outer skin.

[0016] 2. The present invention detects the tension of the pull rope through the nature of the limit pin. When the tension reaches the limit value that the limit pin can withstand, the limit pin breaks, and then the active ring moves, reducing the probability of deformation of the cable sleeve due to excessive pressure.

[0017] 3. The present invention drives one side of the wrapping sleeve to rotate through the elastic push rod, gradually deforming the wrapping sleeve into a spiral state and applying a circumferential clamping force to the cable to fix the cable, making the wrapping sleeve and the cable form a whole, so as to fix the cable sleeve by the wrapping sleeve, further reducing the probability of relative sliding between the cable sleeve and the cable, ensuring the efficiency of pulling the cable, and using the characteristic that the wrapping sleeve is made of flexible material to reduce the probability of damage to the cable outer skin and ensure the integrity of the cable outer skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a three-dimensional structural sectional view of the outer shell of the present invention; Figure 3 is a three-dimensional structural schematic diagram of the components inside the outer shell of the present invention; Figure 4 is a three-dimensional structural schematic diagram of the active ring, inner rotating ring and pull rope of the present invention; Figure 5 is a three-dimensional structural schematic diagram of the fastener of the present invention; Figure 6 is a three-dimensional structural schematic diagram of the driving rack and transmission gear of the present invention; Figure 7 is a three-dimensional structural schematic diagram of the spiral groove of the present invention; Figure 8 is a three-dimensional structural schematic diagram of the elastic push rod of the present invention.

[0019] Reference numerals in the drawings: 1 - outer casing, 101 - spiral groove, 2 - driving ring, 3 - inner rotating ring, 4 - pulling rope, 5 - cable mesh sleeve, 6 - fastener, 21 - fixing ring, 22 - driving rack, 23 - transmission gear, 31 - limiting pin, 41 - convex ball, 51 - limiting ring, 61 - wrapping sleeve, 62 - fixing plate, 63 - follower ring, 71 - elastic push rod. Specific implementation manners

[0020] The following describes the implementation manners of the present invention with reference to the drawings.

[0021] Example 1: A cable pulling construction tool for electrical engineering in a power plant. As shown in Figures 1 - 5 , it includes an outer casing 1; two driving rings 2, both of which are slidably and rotatably connected inside the outer casing 1; an inner rotating ring 3, rotatably connected to one of the driving rings 2, and a pulling rope 4 is fixedly connected between the inner rotating ring 3 and the outer casing 1; a cable mesh sleeve 5, fixedly connected to one side of the outer casing 1 close to the inner rotating ring 3; a fastener 6, fixedly connected between the two driving rings 2 for fixing the cable mesh sleeve 5; a transmission assembly, arranged between the two driving rings 2 for relatively moving the two driving rings 2; the fastener 6 is made of shape memory metal and is spiral.

[0022] In the above solution, a method for strengthening the cable mesh sleeve 5 is proposed to reduce the probability of relative movement between the cable mesh sleeve 5 and the cable; the inner rotating ring 3 is located inside the left driving ring 2; in this solution, the middle part of the pulling rope 4 is connected to an external traction device; the cable mesh sleeve 5 is an existing structure; by driving the two sides of the fastener 6 to rotate in opposite directions and stretching it, the diameter of the circle where the axis of the fastener 6 is located is reduced, and the cable mesh sleeve 5 is clamped.

[0023] As shown in Figures 3 - 6 , the transmission assembly includes: two fixing rings 21, respectively rotatably connected to the adjacent driving rings 2, a driving rack 22 is fixedly connected to the fixing ring 21, the driving rack 22 is slidably connected to the outer casing 1, and the two driving racks 22 are centrosymmetrically distributed; a transmission gear 23, rotatably connected inside the outer casing 1, and the driving rack 22 meshes with the transmission gear 23.

[0024] In the above solution, a method for jointly moving the two driving rings 2 is proposed to move the two driving rings 2 towards or away from each other. Both fixing rings 21 are located on the opposite sides of the two driving rings 2. Two chutes are provided on the inner wall of the outer casing 1, and the driving rack 22 is located inside the adjacent chutes and slides to ensure the stability of the movement of the driving rack 22; a knob is provided on the upper side of the transmission gear 23 to facilitate the operator to drive the transmission gear 23 to rotate.

[0025] As shown in Figures 2 - 8As shown in the figure, a limit pin 31 is slidably connected to the active ring 2 near the draw rope 4. The limit pin 31 penetrates through the outer casing 1. A convex ball 41 is fixedly connected to the active ring 2. The outer casing 1 is provided with two spiral grooves 101. The spiral directions of the two spiral grooves 101 are the same. The convex ball 41 slides in the adjacent spiral groove 101. Two limit rings 51 are fixedly connected to the outer casing 1. Two active rings 2 are located between the two limit rings 51. The limit rings 51 are used to limit the adjacent active ring 2.

[0026] In the above solution, the limit pin 31 is located on the left active ring 2. The limit pin 31 is an existing pin, which is used to limit the left active ring 2. At the same time, the limit pin 31 acts as a safety shear element. When the pulling force applied to the active ring 2 by the draw rope 4 through the inner rotating ring 3 reaches a certain set value, the limit pin 31 breaks under the action of the shear force. During the process of the convex ball 41 sliding in the spiral groove 101, the convex ball 41 drives the active ring 2 to rotate. The limit ring 51 limits the active ring 2 to prevent the active ring 2 from moving too far, resulting in excessive squeezing force of the fastener 6 on the cable sleeve 5 and the cable, which may cause deformation of the cable sleeve 5 and the cable. In this solution, the installation position of the limit ring 51 can be adjusted to adapt to different types of cables.

[0027] Working principle: When using this device to pull the cable, first insert the cable into the cable sleeve 5, and connect the draw rope 4 with an external traction device. Then start the traction device. When the traction device starts to work and pulls the draw rope 4, the draw rope 4 applies a pulling force to the outer casing 1 and the inner rotating ring 3 together. At this time, due to the limit pin 31 limiting the left active ring 2, the inner rotating ring 3 cannot move, and the outer casing 1 applies a pulling force to the cable sleeve 5. The cable sleeve 5 deforms under the pull and wraps around the circumference of the cable. The traction force received by the cable sleeve 5 is evenly distributed on the outer peripheral surface of the cable. In this way, the pulling work of the cable starts.

[0028] During the process of pulling the cable, the draw rope 4 applies a force to the left active ring 2 through the inner rotating ring 3, and the left active ring 2 applies a force to the outer casing 1 through the limit pin 31. At this time, the left active ring 2 and the outer casing 1 apply a shear force to the limit pin 31.

[0029] During the process of pulling the cable, as the pulled length of the cable gradually increases, the moving resistance of the cable gradually increases, that is, the pulling force applied by the traction device to the cable should also gradually increase to ensure the pulling efficiency of the cable. As the pulling force gradually increases, the shear force applied by the left active ring 2 and the outer casing 1 to the limit pin 31 gradually increases until the shear force exceeds the limit value that the limit pin 31 can bear, and the limit pin 31 breaks.

[0030] After the limit pin 31 breaks, the pull rope 4 drives the left active ring 2 to move leftward through the inner rotating ring 3. The left active ring 2 drives the fixed ring 21 on the left to move. The fixed ring 21 on the left drives the driving rack 22 at the rear to move. The driving rack 22 at the rear drives the driving rack 22 at the front through the transmission gear 23. The driving rack 22 at the front drives the active ring 2 on the right to move rightward. During this process, the two active rings 2 move away from each other, and the two active rings 2 drive the two sides of the fastener 6 to move away from each other respectively.

[0031] During the process of the two active rings 2 moving away from each other, the active ring 2 drives the convex ball 41 thereon to move. The convex ball 41 slides along the adjacent spiral groove 101, that is, the convex ball 41 drives the adjacent active ring 2 to move. The active ring 2 and the adjacent fixed ring 21 rotate relative to each other, and the active ring 2 on the left rotates relative to the inner rotating ring 3. Since the spiral directions of the two spiral grooves 101 are the same, the rotation directions of the two active rings 2 are opposite, and the two active rings 2 drive the two sides of the fastener 6 to rotate in opposite directions respectively.

[0032] To sum up, while the fastener 6 is subjected to a tensile force, it will also be subjected to a tightening force. During this process, the fastener 6 will gradually expand along its axial direction, and the diameter of the circle where it is located in the axial direction will gradually decrease. The fastener 6 gradually deforms towards the axial direction of the cable. Until the fastener 6 contacts the cable mesh sleeve 5, the two active rings 2 continue to move and gradually apply a force to the fastener 6, so that the fastener 6 tightly wraps the cable mesh sleeve 5 and applies a circumferential clamping force to the cable mesh sleeve 5, so that the cable mesh sleeve 5 further strengthens its clamping force on the cable. As the active ring 2 moves, the clamping force of the fastener 6 on the cable mesh sleeve 5 gradually increases, thereby maintaining the stable state between the cable mesh sleeve 5 and the cable, reducing the probability of relative sliding between the cable mesh sleeve 5 and the cable, and thus ensuring the efficiency of pulling the cable and reducing the occurrence of cable outer skin wear.

[0033] As the active ring 2 moves, when the active ring 2 contacts the limit ring 51, the limit ring 51 limits the active ring 2 so that the active ring 2 cannot continue to move, that is, the fastener 6 no longer deforms. At the same time, the active ring 2 and the outer shell 1 form a whole. During this process, under the combined action of the fastener 6 and the cable mesh sleeve 5, the cable is continuously pulled until the cable is pulled to the specified position, and then the pulling work ends.

[0034] After finishing the pulling work, the operator disconnects the pulling rope 4 from the traction device and reversely rotates the transmission gear 23 to move the two driving racks 22 towards each other. The driving racks 22 drive the driving ring 2 to reset through the adjacent fixing rings 21. During this process, the two driving rings 2 rotate reversely and approach each other, causing the fastener 6 to return to its original state. Subsequently, the operator expands the cable socket 5 and takes out the cable. After the two driving rings 2 are reset, the operator inserts a new limit pin 31 into the outer housing 1 again and limits the left driving ring 2. Thus, the use of this device ends.

[0035] Embodiment 2: On the basis of Embodiment 1, as shown in Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 8 , it further includes: a secondary fixing mechanism, which is arranged inside the outer housing 1 and is used to tighten the cable. The secondary fixing mechanism includes: a wrapping sleeve 61, which is fixedly connected to the side of the cable socket 5 away from the pulling rope 4; a fixing plate 62, which is fixedly connected inside the outer housing 1; a follower ring 63, which is rotatably connected to the fixing plate 62 and is fixedly connected to the wrapping sleeve 61; the diameter of the circle where the axis of the fastener 6 is located is larger than the diameter of the circle where the axis of the wrapping sleeve 61 is located; the wrapping sleeve 61 is made of a flexible material, and its inner side is set as a rough surface.

[0036] In the above solution, a method for fixing the cable and pulling the cable socket 5 is proposed to reduce the probability of relative movement between the cable socket 5 and the cable; the wrapping sleeve 61 is made of a soft and deformable material, such as rubber material, to increase the friction between it and the cable. A rigid circular ring is connected between the wrapping sleeve 61 and the cable socket 5 to support the wrapping sleeve 61, so as to achieve the effect that the wrapping sleeve 61 does not contact the cable initially.

[0037] As shown in Figure 3 , Figure 5 , Figure 6 and Figure 8 , two elastic push rods 71 are fixedly connected to the driving ring 2 on the right side at intervals. The elastic push rods 71 are used to drive the driving ring 2 on the right side to reset. The telescopic ends of the elastic push rods 71 are fixedly connected to the follower ring 63, and the elastic push rods 71 transfer the rotational force of the driving ring 2 on the right side to the follower ring 63.

[0038] Working principle: During the process of the active ring 2 on the right moving to the right, the elastic push rod 71 on the active ring 2 on the right is driven to move to the right. The elastic push rod 71 gradually contracts and starts to store energy. During this process, the active ring 2 on the right drives the elastic push rod 71 to rotate circumferentially. The telescopic end of the elastic push rod 71 drives the follower ring 63 to rotate. The follower ring 63 then 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 mesh sleeve 5. As the right side of the wrapping sleeve 61 rotates, the wrapping sleeve 61 gradually deforms into a spiral state and tightens towards its axis direction until the inner side of the wrapping sleeve 61 fits the cable. Then 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, since the inner surface of the wrapping sleeve 61 is a rough surface, the relative position between the two is ensured. As the wrapping sleeve 61 gradually contracts, the force exerted by the wrapping sleeve 61 on the cable gradually increases, realizing the fixation of the cable, making the wrapping sleeve 61 and the cable form an integral body, thereby fixing the wrapping sleeve 61 to the cable mesh sleeve 5, further reducing the probability of relative sliding between the cable mesh sleeve 5 and the cable. And because the wrapping sleeve 61 is made of flexible material, the probability of cable outer skin abrasion is reduced.

[0039] During the process of the cable mesh sleeve 5 pulling the wrapping sleeve 61, when the wrapping sleeve 61 tightly wraps the cable, the cable mesh 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.

[0040] During the process of the active ring 2 on the right moving to the right, the right side of the fastener 6 gradually moves to the right and moves to the outer peripheral side of the wrapping sleeve 61. At the same time, during the contraction process of the fastener 6, the right side of the fastener 6 gradually wraps the wrapping sleeve 61, thus further strengthening the clamping force of the wrapping sleeve 61 on the cable, ensuring the stable state between the wrapping sleeve 61 and the cable, and reducing the probability of relative movement between the wrapping sleeve 61 and the cable.

[0041] After the pulling work is completed, the operator disconnects the pulling rope 4 from the external traction device. The elastic push rod 71 will return to its original state under the action of its own elasticity and push the active ring 2 on the right to move left for reset. The active ring 2 on the right drives the active ring 2 on the left to reset through the two driving racks 22 and the transmission gear 23, and continues the reset process of Example 1.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes may be made therein without departing from the principles and spirit of the invention.

Claims

1. A cable pulling construction tool for power plant electrical engineering, characterized in that: Included are: Mantle (1); There are two active rings (2), both of which are slidably and rotatably connected to the outer shell (1); An inner rotating ring (3) is rotatably connected to one of the active rings (2), and a drawstring (4) is fixedly connected between the inner rotating ring (3) and the outer shell (1); A cable mesh sleeve (5) is fixedly connected to a side of the outer casing (1) close to the inner swivel (3); A fastener (6) is fixedly connected between the two active rings (2) and is used to fix the cable mesh sleeve (5); A transmission assembly is arranged between the two active rings (2) and is used to enable the two active rings (2) to move relative to each other.

2. A cable pulling construction tool for power plant electrical engineering according to claim 1, characterized in that: The fastener (6) is made of memory metal and is in a spiral shape.

3. A cable pulling construction tool for power plant electrical engineering according to claim 1, characterized in that: The transmission assembly comprises: The fixing ring (21) has two parts, each of which is rotatably connected to the adjacent active ring (2). The fixing ring (21) is fixedly connected with a driving rack (22). The two driving racks (22) are centrally symmetrically distributed. The driving racks (22) are slidably connected to the outer shell (1). A transmission gear (23) is rotatably connected to the outer shell (1), and the driving rack (22) is meshed with the transmission gear (23).

4. A cable pulling construction tool for power plant electrical engineering according to claim 1, characterized in that: The active ring (2) close to the pull rope (4) is slidably connected to a limit pin (31), and the limit pin (31) passes through the outer shell (1).

5. A cable pulling construction tool for power plant electrical engineering according to claim 1, characterized in that: A convex ball (41) is fixedly connected 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) is located in adjacent spiral grooves (101) to slide.

6. A cable pulling construction tool for power plant electrical engineering according to claim 1, characterized in that: The outer shell (1) is fixedly connected to two limiting rings (51), the two active rings (2) are located between the two limiting rings (51), and the limiting rings (51) are used to limit the positions of adjacent active rings (2).

7. A cable pulling construction tool for power plant electrical engineering according to claim 1, characterized in that: Also included are: A secondary fixing mechanism is arranged in the outer shell (1) and is used to tighten the cable, and the secondary fixing mechanism comprises: A wrapping sleeve (61) fixedly connected to a side of the cable mesh sleeve (5) away from the pull rope (4); A fixing plate (62) fixedly connected to the outer shell (1); The follower ring (63) is rotatably connected to the fixing plate (62) and is fixedly connected to the wrapping sleeve (61).

8. A cable pulling construction tool for power plant electrical engineering according to claim 7, characterized in that: The diameter of the circle in the axial direction of the fastener (6) is greater than the diameter of the circle in the axial direction of the wrapping sleeve (61).

9. A cable pulling construction tool for power plant electrical engineering according to claim 7, characterized in that: The wrapping sleeve (61) is made of a flexible material, and its inner side surface is configured as a rough surface.

10. A cable pulling construction tool for power plant electrical engineering according to claim 7, characterized in that: The active ring (2) close to the fixed plate (62) is fixedly connected with elastic push rods (71) distributed at intervals, and the telescopic ends of the elastic push rods (71) are fixedly connected to the follower ring (63).

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