Lifting hanger for pre-branching cable and lifting method for pre-branching cable

Abstract

The present invention provides a lifting hanger for a pre-branching cable and a lifting method for a pre-branching cable. The pre-branching cable has multiple wire cores, and the lifting hanger includes a suspension rod, a load-bearing block and multiple limiters. The suspension rod has a head end and a tail end along the length direction, and the head end of the suspension rod has a lifting lug. The load-bearing block is sleeved on the tail end of the suspension rod, and multiple first accommodating holes for multiple wire cores to pass through are arranged at intervals on the load-bearing block. Multiple limiters abut one end of the load-bearing block facing the head end of the suspension rod, and the multiple limiters are arranged in a one-to-one correspondence with the multiple first accommodating holes. The limiters have second accommodating holes for the wire cores to pass through, and the cross-section size of the limiter along the radial direction of the first accommodating hole is larger than the diameter of the first accommodating hole. The limiter is used to connect to the part of the wire core that extends out of the load-bearing block. Even if the pre-branching cable is heavy, the limiter will not pass through the first accommodating hole, and the lifting reliability and safety of the lifting hanger are high.

Description

Technical Field

[0001] The invention relates to a lifting hanger for a pre-branching cable and a lifting method for the pre-branching cable. Background Art

[0002] Pre-branching cables are increasingly being used, from the most conventional plastic cables to today's mineral cables. However, the lifting fixtures for pre-branching cables have always used stainless steel mesh covers with lugs. When lifting a pre-branching cable, the mesh needs to be placed directly over the end of the cable, then clamped to the cable with a clamp, and finally lifted using the lugs. While this operation may seem simple and convenient, it actually carries significant risks. Lifting and installing the cable primarily relies on the friction between the cable and the mesh cover. If the cable is heavy or the clamp becomes loose, the friction between the cable and the mesh cover will be insufficient, causing it to slip. In severe cases, the cable can even fall. The potential damage caused by a live cable falling from a height is unimaginable, resulting in lower reliability and safety.

[0003] In summary, the lifting hanger for pre-branching cables in the prior art has the disadvantages of low lifting reliability and safety. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the lifting hanger for pre-branching cables in the prior art in terms of low lifting reliability and safety, and to provide a lifting hanger for pre-branching cables and a lifting method for pre-branching cables.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A lifting hanger for a pre-branching cable, wherein the pre-branching cable has multiple cores, wherein the lifting hanger comprises:

[0007] A boom, wherein the boom has a head end and a tail end along a length direction, and the head end of the boom has a lifting lug;

[0008] A load-bearing block, the load-bearing block being sleeved on the tail end of the suspension rod, the load-bearing block being provided with a plurality of first accommodating holes for allowing a plurality of the wire cores to pass therethrough at intervals, the first accommodating holes extending along the length direction of the suspension rod;

[0009] Multiple limiting members, multiple limiting members abut against one end of the load-bearing block toward the head end of the suspension rod, multiple limiting members are arranged in one-to-one correspondence with multiple first accommodating holes, the limiting member has a second accommodating hole for the wire core to pass through, and the cross-sectional size of the limiting member along the radial direction of the first accommodating hole is larger than the diameter of the first accommodating hole, and the limiting member is used to connect to the part of the wire core that extends out of the load-bearing block.

[0010] In this solution, the limiter can be sleeved on the wire core, and the cross-sectional size of the limiter is larger than the diameter of the first accommodating hole. When the pre-branching cable is lifted, even if the pre-branching cable is heavy, the limiter will not pass through the first accommodating hole. The lifting hanger can still lift the pre-branching cable more reliably, and the lifting reliability and safety are higher.

[0011] Preferably, the lifting hook further includes a plurality of washers, which are respectively pressed between the plurality of limiting members and the load-bearing blocks, and the cross-sectional size of the washers along the radial direction of the first accommodating hole is larger than the diameter of the first accommodating hole.

[0012] In this solution, the washer can increase the contact area. When the pre-branching cable is heavy, the washer can further prevent the limiting member from passing through the first accommodating hole, which is beneficial to further improve the reliability and safety of lifting.

[0013] Preferably, the lifting hanger further comprises:

[0014] A pressure cover is sleeved on the tail end of the suspension rod, and one end of the pressure cover facing the load-bearing block is connected to the load-bearing block. The pressure cover is provided with a plurality of third accommodating holes extending along the length direction of the suspension rod, and the plurality of third accommodating holes are arranged in a one-to-one correspondence with the plurality of limiting members and are used to accommodate the plurality of limiting members.

[0015] In this solution, the gland can protect the limiter and the wire core, which is beneficial to further improve the safety of lifting.

[0016] Preferably, a recessed portion is provided in one end of the pressure cover facing the load-bearing block, and a protruding portion is provided in one end of the load-bearing block facing the pressure cover, and the protruding portion is clamped in the recessed portion.

[0017] In this solution, the pressure cover and the load-bearing block are connected by snapping together through their own structural characteristics, and it is not easy to add an additional connection structure. The structure is simple, which is conducive to cost saving.

[0018] Preferably, a step portion is formed at the tail end of the suspension rod, and the pressure cover is clamped between the load-bearing block and the step portion.

[0019] In this solution, on the one hand, when the boom is passed through the pressure cover and the load-bearing block, the step portion can serve as an indicator. When the step portion abuts against the pressure cover, it indicates that the boom has been passed into place. On the other hand, the step portion can limit the pressure cover, so that the pressure cover can be more reliably set between the load-bearing block and the step portion, which is conducive to further improving the reliability of lifting.

[0020] Preferably, the tail end of the suspension rod is provided with a thread, and the tail end of the suspension rod is threadedly connected to the load-bearing block.

[0021] Preferably, the load-bearing block has a connecting hole extending along the length direction of the suspension rod, and the load-bearing block is sleeved on the tail end of the suspension rod through the connecting hole;

[0022] A nut is embedded in the connecting hole, and the tail end of the suspension rod is threadedly connected to the nut.

[0023] In this solution, the tail end of the suspension rod may only be provided with threads at the position corresponding to the nut, and no threads are required in the gland and the load-bearing block. The processing technology is simple, which is conducive to further reducing costs.

[0024] Preferably, the limiting member is a copper tube.

[0025] In this solution, the wire core is usually a copper conductor. Setting the material of the limiter to the same as that of the wire core can avoid the potential difference caused by different materials, which is conducive to reducing or avoiding corrosion.

[0026] The present invention also provides a method for lifting a pre-branching cable, which is characterized in that it utilizes the lifting hanger for the pre-branching cable as described above, and the lifting method includes the following steps:

[0027] S10, peeling off the end of the pre-branching cable to expose a plurality of wire cores by a preset length;

[0028] S20, allowing the plurality of wire cores to pass through the plurality of first accommodating holes, through the bearing block, and be exposed from the bearing block;

[0029] S30, connecting the plurality of limit members to the plurality of wire cores respectively;

[0030] S40, allowing the tail end of the suspension rod to pass through and be connected to the load-bearing block.

[0031] Preferably, in step S30, a plurality of the limiting members are crimped onto a plurality of the wire cores.

[0032] Preferably, the lifting hanger further comprises a plurality of washers, wherein the plurality of washers are respectively pressed between the plurality of limit members and the load-bearing blocks, and the size of the cross section of the washers along the radial direction of the first accommodating hole is greater than the diameter of the first accommodating hole;

[0033] After step S20 and before step S30, the lifting method further includes the steps of:

[0034] S23. Sleeve the plurality of washers on the plurality of wire cores respectively, so that the plurality of washers fit on the load-bearing blocks.

[0035] Preferably, the lifting hanger further comprises a pressure cover, the pressure cover is sleeved on the tail end of the suspension rod, one end of the pressure cover facing the load-bearing block is connected to the load-bearing block, the pressure cover is provided with a plurality of second accommodating holes extending along the length direction of the suspension rod, the plurality of second accommodating holes are arranged in a one-to-one correspondence with the plurality of limiting members and are used to accommodate the plurality of limiting members;

[0036] After step S30 and before step S40, the lifting method further includes the steps of:

[0037] S34, sleeve the gland onto the plurality of limit members through the plurality of second accommodating holes, and connect the gland to the bearing block;

[0038] Step S40 is: making the tail end of the suspension rod pass through the gland and the load-bearing block in sequence, and making the tail end of the suspension rod connected to the load-bearing block.

[0039] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0040] The positive progress effect of the present invention is:

[0041] In this lifting hanger, the limiting member can be sleeved onto the wire core. The cross-sectional dimensions of the limiting member are larger than the diameter of the first accommodating hole. When lifting the pre-branching cable, even if the pre-branching cable is heavy, the limiting member will not pass through the first accommodating hole. The lifting hanger can still lift the pre-branching cable relatively reliably, with high lifting reliability and safety. The lifting method for the pre-branching cable is relatively simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the overall structure of a lifting hanger for pre-branching cables according to Example 1 of the present invention.

[0043] Figure 2 This is a schematic structural diagram of the lifting rod in the lifting hanger for pre-branching cables in Example 1 of the present invention.

[0044] Figure 3 This is a schematic structural diagram of the load-bearing block in the lifting hanger for pre-branching cables according to Example 1 of the present invention.

[0045] Figure 4 This is a schematic structural diagram of the gland in the lifting hanger for pre-branching cables according to Example 1 of the present invention.

[0046] Figure 5 This is a flow chart of a method for lifting a pre-branching cable according to embodiment 2 of the present invention.

[0047] Description of reference numerals:

[0048] 10 boom

[0049] 101 hanging lugs

[0050] 102 Steps

[0051] 103 thread

[0052] 20 bearing blocks

[0053] 201 first receiving hole

[0054] 202 protrusion

[0055] 203 connection hole

[0056] 30 gland

[0057] 301 third receiving hole

[0058] 302 Depression

[0059] 40 Nut DETAILED DESCRIPTION

[0060] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0061] Example 1

[0062] This embodiment discloses a lifting device for a pre-branch cable. The pre-branch cable has multiple cores. Figure 1-4 It is understood that the lifting device includes a suspension rod 10, a bearing block 20 and a plurality of limiters (not shown in the figure). The suspension rod 10 has a head end and a tail end along the length direction. The head end of the suspension rod 10 has a lifting lug 101. The bearing block 20 is sleeved on the tail end of the suspension rod 10. The bearing block 20 is provided with a plurality of first accommodating holes 201 ( Figure 3Five first accommodating holes 201 are shown in the figure. The first accommodating holes 201 extend along the length direction of the suspension rod 10. A plurality of limiting members abut against one end of the load-bearing block 20 facing the head end of the suspension rod 10. The plurality of limiting members are arranged in a one-to-one correspondence with the plurality of first accommodating holes 201. The limiting members have second accommodating holes (not shown in the figure) for the wire core to pass through. The cross-section of the limiting members along the radial direction of the first accommodating holes 201 is larger than the diameter of the first accommodating holes 201. The limiting members are used to connect to the portion of the wire core that extends out of the load-bearing block 20.

[0063] In this embodiment, the limiting member can be sleeved on the wire core, and the cross-sectional size of the limiting member is larger than the diameter of the first accommodating hole 201. When the pre-branching cable is lifted, even if the pre-branching cable is heavy, the limiting member will not pass through the first accommodating hole 201. The lifting hanger can still lift the pre-branching cable more reliably, and the lifting reliability and safety are high.

[0064] It should be noted that in this embodiment, the stopper is a copper tube, and the load-bearing block 20 is made of an insulating material (such as plastic). The wire core is typically a copper conductor. Setting the stopper to the same material as the wire core can avoid potential differences caused by different materials, which helps reduce or prevent corrosion. In other alternative embodiments, the stopper can also be a plastic tube, an aluminum alloy tube, or a stainless steel tube.

[0065] Furthermore, the lifting hook includes multiple washers (not shown in the figure), which are respectively pressed between the multiple limit members and the load-bearing block 20. The cross-section of the washers along the radial direction of the first receiving hole 201 is larger than the diameter of the first receiving hole 201. The washers can increase the contact area. When the pre-branching cable is heavy, the washers can further prevent the limit members from passing through the first receiving hole 201, which helps to further improve the reliability and safety of the lifting.

[0066] Furthermore, refer to Figure 1 As understood in conjunction with 4, the lifting hook also includes a pressure cover 30, which is sleeved on the tail end of the boom 10, and one end of the pressure cover 30 facing the load-bearing block 20 is connected to the load-bearing block 20. The pressure cover 30 is provided with a plurality of third accommodating holes 301 extending along the length direction of the boom 10, and the plurality of third accommodating holes 301 are arranged in a one-to-one correspondence with the plurality of limiting members and are used to accommodate the plurality of limiting members. The pressure cover 30 can protect the limiting members and the wire core, prevent the limiting members from being exposed to the air, and is conducive to further improving the safety of the lifting. It should be noted that, in this embodiment, the gasket is located between the contact surface of the pressure cover 30 and the load-bearing block 20.

[0067] Furthermore, refer to Figure 1It is understood that a recessed portion 302 is provided on the end of the gland 30 facing the bearing block 20, and a protruding portion 202 is provided on the end of the bearing block 20 facing the gland 30, with the protruding portion 202 being engaged with the recessed portion 302. The gland 30 and the bearing block 20 are engaged and connected by their own structural features, eliminating the need for additional connecting structures, resulting in a simple structure and cost savings.

[0068] It should be noted that, in other alternative embodiments, the gland 30 may also be connected to the load-bearing block 20 via threads 103 .

[0069] Furthermore, refer to Figure 1 and Figure 2 It is understood that a step portion 102 is formed at the tail end of the boom 10, and the gland 30 is clamped between the bearing block 20 and the step portion 102. On the one hand, when the boom 10 passes through the gland 30 and the bearing block 20, the step portion 102 can serve as an indicator. When the step portion 102 abuts against the gland 30, it indicates that the boom 10 has been properly inserted. On the other hand, the step portion 102 can limit the gland 30, allowing the gland 30 to be more reliably set between the bearing block 20 and the step portion 102, which is conducive to further improving the reliability of lifting.

[0070] Furthermore, the tail end of the suspender rod 10 is provided with threads 103, which connect the tail end of the suspender rod 10 to the load-bearing block 20 via the threads 103. Specifically, the load-bearing block 20 has a connection hole 203 extending along the length of the suspender rod 10. The load-bearing block 20 is sleeved onto the tail end of the suspender rod 10 through the connection hole 203. A nut 40 is embedded in the connection hole 203, and the tail end of the suspender rod 10 is connected to the nut 40 through the threads 103. The tail end of the suspender rod 10 can be provided with threads 103 only at the position corresponding to the nut 40, while threads 103 are not required in the gland 30 or the load-bearing block 20. This simplifies the manufacturing process and helps further reduce costs.

[0071] In other alternative embodiments, threads may be provided on the portion of the tail end of the boom 10 that passes through the gland 30 and the load-bearing block 20 , and corresponding threads may also be provided inside the gland 30 and the load-bearing block 20 .

[0072] Example 2

[0073] This embodiment discloses a method for lifting a pre-branched cable. The lifting method utilizes the lifting hanger in embodiment 1. Figure 5 It is understood that the lifting method includes the following steps:

[0074] Step 100: peel off the end of the pre-branching cable to expose a plurality of wire cores to a preset length;

[0075] Step 200: Pass the plurality of wire cores through the plurality of first accommodating holes through the load-bearing block and expose the wire cores from the load-bearing block;

[0076] Step 300: Sleeve multiple washers on multiple wire cores respectively, so that the washers fit closely to the load-bearing blocks;

[0077] Step 400: Connect a plurality of limiting members to a plurality of wire cores respectively;

[0078] Step 500: Sleeve the gland onto the plurality of limit members through the plurality of second accommodating holes, and connect the gland to the bearing block;

[0079] Step 600: Make the tail end of the suspension rod pass through the gland and the bearing block in sequence, and make the tail end of the suspension rod connected to the bearing block.

[0080] It should be noted that, in other alternative embodiments, if the lifting hanger does not include a pressure cover, the lifting method does not include step 500, and step 600 is: allowing the tail end of the lifting rod to pass through and be connected to the load-bearing block.

[0081] In addition, in step 400, the plurality of limiters are crimped to the plurality of wire cores by hydraulic clamps, which is simple to operate and has reliable connection. In other alternative embodiments, the limiters can be crimped to the wire cores by other means, or can be fastened to the wire cores by connection means other than crimping.

[0082] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A method for lifting a pre-branching cable, using a lifting hanger for the pre-branching cable, wherein the pre-branching cable has multiple cores, and the lifting hanger comprises: A boom, wherein the boom has a head end and a tail end along a length direction, and the head end of the boom has a lifting lug; A load-bearing block, the load-bearing block being sleeved on the tail end of the suspension rod, the load-bearing block being provided with a plurality of first accommodating holes for allowing a plurality of the wire cores to pass therethrough at intervals, the first accommodating holes extending along the length direction of the suspension rod; a plurality of limiting members, wherein the plurality of limiting members abut against one end of the bearing block toward the head end of the boom, the plurality of limiting members are arranged in a one-to-one correspondence with the plurality of first accommodating holes, the limiting member having a second accommodating hole for the wire core to pass through, and the size of the cross section of the limiting member along the radial direction of the first accommodating hole is larger than the diameter of the first accommodating hole, and the limiting member is used to connect to the portion of the wire core extending out of the bearing block; a plurality of washers, each of which is pressed between the plurality of limiting members and the load-bearing block, and wherein a cross-section of the washers along the radial direction of the first accommodating hole is larger than a diameter of the first accommodating hole; a gland, the gland being sleeved on the tail end of the suspension rod, one end of the gland facing the load-bearing block being connected to the load-bearing block, the gland being provided with a plurality of third accommodating holes extending along the length direction of the suspension rod, the plurality of third accommodating holes being arranged in a one-to-one correspondence with the plurality of position-limiting members and being used to accommodate the plurality of position-limiting members; A recessed portion is provided in one end of the pressure cover facing the load-bearing block, and a protruding portion is provided in one end of the load-bearing block facing the pressure cover, wherein the protruding portion is clamped in the recessed portion; A step portion is formed at the tail end of the suspension rod, and the gland is clamped between the load-bearing block and the step portion; The lifting method comprises the following steps: S10, peeling off the end of the pre-branching cable to expose a plurality of wire cores by a preset length; S20, allowing the plurality of wire cores to pass through the plurality of first accommodating holes, through the bearing block, and be exposed from the bearing block; S23, respectively sleeve the plurality of washers on the plurality of wire cores, so that the plurality of washers fit closely to the load-bearing blocks; S30, crimping the plurality of limiting members onto the plurality of wire cores respectively; S34, sleeve the gland onto the plurality of limit members through the plurality of third accommodating holes, and connect the gland to the bearing block; S40, making the tail end of the suspension rod pass through the gland and the load-bearing block in sequence, and making the tail end of the suspension rod connected to the load-bearing block.

2. A method for lifting a pre-branched cable according to claim 1, characterized in that: The tail end of the suspension rod is provided with a thread, and the tail end of the suspension rod is threadedly connected to the load-bearing block.

3. A method for lifting a pre-branched cable according to claim 2, characterized in that: The load-bearing block has a connecting hole extending along the length direction of the suspension rod, and the load-bearing block is sleeved on the tail end of the suspension rod through the connecting hole; a nut is embedded in the connecting hole, and the tail end of the suspension rod is threadedly connected to the nut.

4. A method for lifting a pre-branched cable according to any one of claims 1 to 3, characterized in that: The limiting member is a copper tube.

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