Keel drag chain for protecting light and small cables

Abstract

The utility model relates to the technical field of dust-free drag chains, and discloses a keel drag chain for protecting light and small cables, which consists of a plurality of keel blocks which are connected end to end, the rotation angle of the adjacent keel blocks is limited through the abutting fit of the inserting blocks and the abutting cavities, the abutting fit of the positioning seats and the positioning grooves, the abutting fit of the stepped grooves and the clamping seats and the abutting fit of the limiting grooves and the limiting seats, and the stability between the small keel blocks can be improved through the multiple matched limiting points; uncontrollable deformation between the small keel blocks under stress or dynamic loads is avoided, the fracture risk possibly caused by local stress concentration at the connecting positions of the chain links is reduced, and therefore the stability of the whole keel chain frame is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust-free drag chains, in particular to a keel drag chain for protecting light and small cables. Background Art

[0002] Drag chain, also known as cable protection drag chain, is a device that binds cables or wires or air and oil pipes to facilitate their rotation and movement. Its main function is to store, pull and protect various built-in cables (such as cables, wires), pipes (such as air pipes, oil pipes, water pipes, air pipes), etc., so that these lines can run in an orderly and safe manner in a complex and changeable movement environment. Its structure is similar to the track of a tank, consisting of multiple movable unit links, each of which can be opened separately, which is convenient for installation, maintenance and the addition and removal of lines.

[0003] Since the drag chain is set on the outside of the cable to protect the reciprocating cable, in order to prevent the drag chain from sagging and swaying, a keel structure needs to be added inside the drag chain to support the drag chain, which can bear the weight of the cable and other components while maintaining the shape and stability of the drag chain. The design of the drag chain makes it low-noise, wear-resistant, and able to support high-speed movement. It is suitable for a variety of industrial scenarios such as CNC machine tools, robots, injection molding machinery, logistics and handling equipment, and the automotive industry.

[0004] In existing industrial or mechanical equipment, there may be light and small cables connecting moving equipment. Due to the large size of conventional drag chains, the bending radius during reciprocating motion is large, which is not compatible with light and small cables for short-distance reciprocating motion. If a conventional drag chain encounters overload, overweight, or long running time during operation, it is easy for the drag chain to become detached or broken, so it needs to be shut down for repair and replaced with a new one, which will seriously affect the traction efficiency of the drag chain. Utility Model Content

[0005] The utility model is designed to overcome the technical problems existing in the prior art and is a keel drag chain for protecting light and small cables.

[0006] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0007] A keel drag chain for protecting light and small cables, comprising: a clamp, a protective cover, and a keel chain frame; at least two rows of the keel chain frame are symmetrically arranged inside the protective cover; the clamp is detachably arranged on the outer surface of the protective cover, and is used to stably sleeve the protective cover on the outer side of the keel chain frame;

[0008] The keel chain frame comprises at least two keel blocks connected end to end in sequence; the keel block comprises a clamping portion and a clamping seat portion, the clamping portion and the clamping seat portion are respectively provided with a clamping hole and a clamping seat hole, and the clamping holes and the clamping seat holes of two adjacent keel blocks are connected and fixed by bolts;

[0009] The clamping part is provided with a plug-in block, and the clamping seat part is provided with an abutment cavity, and the plug-in blocks of two adjacent keel blocks are correspondingly inserted into the abutment cavity;

[0010] The clamping portion is provided with a positioning seat, and a positioning groove is provided in the clamping seat portion. The positioning seats of two adjacent keel blocks are correspondingly inserted into the positioning groove.

[0011] Preferably, the width of the abutment cavity is greater than the thickness of the plug-in block by 2 mm.

[0012] Preferably, the cables include electrical cables, pipelines, electrical conduits, optical fibers, and the like.

[0013] Preferably, the leather case is made of rubber, artificial leather, cloth, etc.

[0014] Furthermore, the positioning grooves are symmetrically arranged on the cavity wall of the abutting cavity, the positioning seats are symmetrically arranged on both sides of the plug-in block, and the positioning seats of two adjacent keel blocks are correspondingly fitted in the positioning grooves.

[0015] Furthermore, the clamping portion is also provided with a stepped groove, and a clamping seat is provided at the bottom of the clamping seat portion, and the stepped grooves of two adjacent keel blocks are abutted and clamped with the clamping seat.

[0016] Preferably, the stepped groove is arranged at the bottom edge of the abutment cavity, the locking seat is arranged at the bottom of the plug-in block, and the stepped grooves of two adjacent keel blocks are abutted against the locking seat.

[0017] Furthermore, the clamping portion is further provided with a limiting groove, and a limiting seat is provided on the top of the clamping seat portion, and the limiting grooves of two adjacent keel blocks are abutted against the limiting seat for limiting.

[0018] Preferably, the limiting groove is arranged on the upper edge of the limiting seat, the limiting seat is arranged above the abutting cavity, and the limiting grooves of two adjacent keel blocks abut against the limiting seat.

[0019] Furthermore, the abutting cavity is provided in a rectangular groove-shaped structure, and the abutting cavity is extended from an end of the socket portion away from the clamping portion toward a direction close to the clamping portion.

[0020] Furthermore, the keel chain frame composed of the plurality of keel blocks connected end to end has a length of 4600mm-9000mm and an arc radius of 300mm-700mm.

[0021] Preferably, the keel chain frame composed of the plurality of keel blocks connected end to end has a length of 3700mm-7900mm and an arc radius of 370mm-430mm.

[0022] Furthermore, the clamp is composed of two layers of clamp blocks, and a hinge for flipping and opening is provided between the two layers of clamp blocks.

[0023] Furthermore, the clamp is provided with a clamp connection hole, and adjacent clamp blocks are closed by arranging fasteners in the clamp connection hole.

[0024] Furthermore, an end chain lock is provided at the head end of the keel chain frame, and the end chain lock is provided with an end slot hole. The clamp is detachably arranged on the outer surface of the end chain lock and is connected to the end chain lock through a fastener passing through the end slot hole.

[0025] Furthermore, the end chain lock is also provided with an end connecting column, and the end connecting column of the end chain lock can be detachably connected to the clamping holes and the clamping seat holes of the keel blocks at both ends of the keel chain frame.

[0026] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0027] ① Set the keel block as a small joint block so that its running arc radius is 400mm. When the light and small cable is combined with the keel chain frame to form a keel drag chain, the keel drag chain is combined with a small reciprocating motion device. The friction between expansion and contraction can be reduced during the movement of the drag chain, thereby improving the movement smoothness and stability of the drag chain.

[0028] ② Set multiple "matching limit points" in the connection between the keel blocks to improve the rigidity and stability of the entire drag chain;

[0029] The rotation angles of adjacent keel blocks are limited by the cooperation between the plug-in block and the abutment cavity, the rotation angles of adjacent keel blocks are limited by the cooperation between the positioning seat and the positioning groove, the rotation angles of adjacent keel blocks are limited by the cooperation between the step groove and the clamping seat, and the rotation angles of adjacent keel blocks are limited by the cooperation between the limit groove and the limit seat; multiple "cooperation limit points" can improve the stability between small keel blocks, avoid uncontrollable deformation between small keel blocks under force or dynamic load, reduce the risk of fracture caused by local stress concentration at the chain link connection, thereby improving the stability of the entire keel chain frame.

[0030] ③ At least two rows of keels are symmetrically arranged in the dustproof body to evenly distribute the weight of the cables;

[0031] A number of cables are laid flat or / and stacked inside the protective cover, and at least two rows of keel chain frames are symmetrically arranged at the bottom, top or middle of the cables. A stable frame structure is formed by the symmetrically arranged keel chain frames, which effectively enhances the bending and torsion resistance of the entire drag chain, and can also effectively resist external vibration and impact, which is especially important for equipment that needs to work in a dynamic environment.

[0032] ④ Clamp the clamp sleeve onto the keel chain frame and the protective sleeve to fix them and improve the stability of the small cable movement;

[0033] The keel chain frame is arranged inside the protective cover, and the surface of the cable is also provided with a protective cover. Specifically, each cable and the surface of the keel chain frame are provided with an independent protective cover. Multiple cables are connected in a row, and keel chain frames are provided on both sides of the multiple rows of cables. The clamp firmly fits the keel chain frame and the overlapping surfaces of the multiple cables and the protective cover at both ends to prevent the keel chain frame from deforming when the cable moves; a soft leather contact surface is also provided on the clamp block, and the soft leather contact surface on the clamp block effectively fits the outer surface of the limit cover, which can improve the stability of the drag chain while avoiding bending damage to the protective cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a first structural schematic diagram of a keel block;

[0035] Figure 2 is a schematic diagram of the second structure of the keel block;

[0036] Figure 3 This is a cross-sectional view of the keel block;

[0037] Figure 4 This is a bottom view of the keel block;

[0038] Figure 5 It is a schematic diagram of the coordination of adjacent keel blocks;

[0039] Figure 6 It is a structural schematic diagram of the end chain lock;

[0040] Figure 7 It is a structural diagram of the keel drag chain;

[0041] Figure 8 This is a schematic diagram of the structure of Example 3.

[0042] in,

[0043] 1. Clamp; 101. Clamp block; 102. Hinge; 103. Clamp connecting hole;

[0044] 2. Protective cover;

[0045] 3. Keel block; 301. Card hole; 302. Card seat hole; 303. Plug-in block; 304. Abutment cavity; 305. Positioning seat; 306. Positioning groove; 307. Step groove; 308. Card seat; 309. Limiting groove; 3010. Limiting seat;

[0046] 4. Bolts;

[0047] 5. end chain lock; 501. end slot; 502. end connecting column;

[0048] 6. Cable. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0051] Example 1

[0052] like Figure 1-7 As shown, this embodiment discloses a keel drag chain for protecting light and small cables, comprising: a clamp 1, a protective cover 2, and a keel chain frame; at least two rows of the keel chain frame are symmetrically arranged inside the protective cover 2; the clamp 1 is detachably arranged on the outer surface of the protective cover 2, and is used to stably sleeve the protective cover 2 on the outer side of the keel chain frame;

[0053] The keel chain frame includes at least two keel blocks 3 connected end to end in sequence; the keel block 3 includes a clamping portion and a clamping seat portion, the clamping portion and the clamping seat portion are respectively provided with a clamping hole 301 and a clamping seat hole 302, and the clamping holes 301 and the clamping seat holes 302 of two adjacent keel blocks 3 are connected and fixed by bolts 4;

[0054] The clamping part is provided with a plug-in block 303, and the clamping seat part is provided with an abutment cavity 304, and the plug-in blocks 303 of two adjacent keel blocks 3 are correspondingly inserted into the abutment cavity 304;

[0055] The clamping portion is provided with a positioning seat 305 , and a positioning groove 306 is provided in the clamping seat portion. The positioning seats 305 of two adjacent keel blocks 3 are correspondingly inserted into the positioning groove 306 .

[0056] When assembling the keel, align the plug-in block 303 at the head end of the keel block 3 and embed it into the abutment cavity 304 at the tail end of the other keel block 3, and insert the protruding part of the positioning seat 305 at the head end of the keel block 3 into the positioning groove 306 at the tail end of the other keel block 3, and then connect and fix the clamping hole 301 and the clamping seat hole 302 of the two adjacent keel blocks 3 by bolts 4, and then assemble them according to the required installation length, and finally complete the splicing of the drag chain, which effectively improves the bearing capacity between the joint blocks, thereby improving the bearing capacity between adjacent keel blocks 3, and improving the reliability of the keel drag chain.

[0057] Specifically, the accurate docking of the positioning seat 305 and the positioning groove 306 between the keel blocks 3 can guide the staff to quickly mate each keel block 3, and the contact between the positioning seat 305 and the positioning groove 306 is smoother, reducing the friction and wear when the keel blocks 3 rotate relative to each other, thereby extending the service life of the drag chain.

[0058] As a specific implementation, the positioning grooves 306 are symmetrically arranged on the cavity wall of the abutting cavity 304, the positioning seats 305 are symmetrically arranged on both sides of the plug-in block 303, and the positioning seats 305 of two adjacent keel blocks 3 are correspondingly fitted in the positioning grooves 306;

[0059] The clamping part is also provided with a stepped groove 307, and a clamping seat 308 is provided at the bottom of the clamping seat part, and the stepped grooves 307 of two adjacent keel blocks 3 are abutted and clamped with the clamping seat 308;

[0060] The clamping part is also provided with a limiting groove 309, and the top of the clamping seat is provided with a limiting seat 3010, and the limiting grooves 309 of two adjacent keel blocks 3 are abutted against the limiting seat 3010 for limiting;

[0061] The abutting cavity 304 is provided in a rectangular groove-shaped structure, and the abutting cavity 304 is extended from one end of the clamping seat portion away from the clamping portion toward a direction close to the clamping portion.

[0062] Specifically, the stepped groove 307 is arranged at the bottom edge of the abutting cavity 304, the clamping seat 308 is arranged at the bottom of the plug-in block 303, and the stepped grooves 307 of two adjacent keel blocks 3 are abutted against the clamping seat 308;

[0063] Insert the raised part of the locking seat 308 at the front end of the keel block 3 into the stepped groove 307 at the rear end of another keel block 3, and insert the limiting groove 309 at the front end of the keel block 3 into the limiting seat 3010 which is sleeved onto the rear end of another keel block 3, so as to ensure that both the stepped groove 307 and the limiting groove 309 provide supporting force at the same time, thereby improving the bearing capacity between adjacent keel blocks 3 and further improving the reliability of the keel drag chain.

[0064] Specifically, a plurality of "matching limit points" are set in the connection between the keel blocks 3, and the adjacent keel blocks 3 are limited in rotation angle by the matching of the plug-in block 303 and the abutment cavity 304, and the adjacent keel blocks 3 are also limited in rotation angle by the matching of the positioning seat 305 and the positioning groove 306, and the adjacent keel blocks 3 are also limited in rotation angle by the matching of the step groove 307 and the locking seat 308, and the adjacent keel blocks 3 are also limited in rotation angle by the matching of the limit groove 309 and the limit seat 3010; through a plurality of "matching limit points", the stability between the small keel blocks 3 can be improved, and uncontrollable deformation between the small keel blocks 3 under force or dynamic load can be avoided, and the risk of fracture caused by local stress concentration at the chain link connection can be reduced, thereby improving the stability of the entire keel chain frame.

[0065] As a specific implementation manner, a keel chain frame composed of a plurality of keel blocks 3 connected end to end has a length of 4600mm-9000mm and an arc radius of 300mm-700mm.

[0066] Specifically, the keel block 3 is set as a small joint block, so that its running arc radius is 400mm. When the light and small cable 6 is combined with the keel chain frame to form a keel drag chain, the keel drag chain is combined with the reciprocating small motion equipment, so that the friction between expansion and contraction can be reduced when the small drag chain moves, thereby improving the movement smoothness and stability of the drag chain. It can greatly reduce the friction and blocking of the machine equipment on the drag chain, reduce downtime for maintenance, reduce the number of frequent replacements, and other time-consuming and labor-intensive aspects of production.

[0067] Specifically, when the drag chain is being assembled, the width of the abutment cavity 304 is greater than the thickness of the plug-in block 303, the width of the positioning groove 306 is greater than the thickness of the positioning seat 305, the width of the step groove 307 is greater than the thickness of the locking seat 308, and the width of the limiting groove 309 is greater than the thickness of the limiting seat 3010, which can effectively ensure that adjacent small keel blocks 3 can be quickly plugged in, making the contact between the keel blocks 3 smoother, reducing the friction and wear when the keel blocks 3 rotate against each other, thereby extending the service life of the drag chain.

[0068] As a specific implementation, the clamp 1 is composed of two layers of clamp blocks 101, and a hinge 102 for flipping and opening is provided between the two layers of clamp blocks 101;

[0069] The clamp 1 is also provided with a clamp connection hole 103 , and adjacent clamp blocks 101 are closed by arranging fasteners in the clamp connection hole 103 .

[0070] Specifically, each cable 6 and the surface of the keel chain frame is provided with an independent protective cover 2, multiple cables 6 are connected in a row, and keel chain frames are provided on both sides of the multiple rows of cables 6. The clamp 1 firmly fits the keel chain frame and the overlapping surfaces of the two ends of the multiple cables 6 and the protective cover 2 to prevent the keel chain frame from deforming when the cable 6 moves; a soft leather contact surface is also provided on the clamp block 101, and the soft leather contact surface on the clamp block 101 effectively fits the outer surface of the protective cover 2, which can improve the stability of the drag chain while avoiding bending damage to the protective cover 2.

[0071] As a specific implementation method, a plurality of cables 6 are laid flat or / and stacked inside the protective cover 2, and at least two rows of keel chain frames are symmetrically arranged at the bottom, top or middle of the plurality of cables 6. A stable frame structure is formed by the symmetrically arranged keel chain frames, which effectively enhances the bending and torsion resistance of the entire drag chain, and can also effectively resist external vibrations and impacts, which is especially important for equipment that needs to work in a dynamic environment.

[0072] Example 2

[0073] like Figure 1-7 As shown, this embodiment discloses a keel drag chain for protecting light and small cables, comprising: a clamp 1, a protective cover 2, and a keel chain frame; at least two rows of the keel chain frame are symmetrically arranged inside the protective cover 2; the clamp 1 is detachably arranged on the outer surface of the protective cover 2, and is used to stably sleeve the protective cover 2 on the outer side of the keel chain frame;

[0074] The keel chain frame includes at least two keel blocks 3 connected end to end in sequence; the keel block 3 includes a clamping portion and a clamping seat portion, the clamping portion and the clamping seat portion are respectively provided with a clamping hole 301 and a clamping seat hole 302, and the clamping holes 301 and the clamping seat holes 302 of two adjacent keel blocks 3 are connected and fixed by bolts 4;

[0075] The clamping part is provided with a plug-in block 303, and the clamping seat part is provided with an abutment cavity 304, and the plug-in blocks 303 of two adjacent keel blocks 3 are correspondingly inserted into the abutment cavity 304;

[0076] The clamping portion is provided with a positioning seat 305 , and a positioning groove 306 is provided in the clamping seat portion. The positioning seats 305 of two adjacent keel blocks 3 are correspondingly inserted into the positioning groove 306 .

[0077] As a specific implementation, the head end of the keel chain frame is provided with an end chain lock 5, the end chain lock 5 is provided with an end slot hole 501, the clamp 1 is detachably arranged on the outer surface of the end chain lock 5, and is connected to the end chain lock 5 through the end slot hole 501 by a fastener;

[0078] The end chain lock 5 is also provided with an end connection column 502 , and the end connection column 502 of the end chain lock 5 can be detachably connected to the clamping hole 301 and the clamping seat hole 302 of the keel blocks 3 at both ends of the keel chain frame.

[0079] Specifically, by disassembling and clamping the end chain lock 5 with the keel blocks 3 at both ends of the keel chain frame, and then fixing the end chain locks 5 at both ends of the keel chain frame to the clamps 1 on the protective cover 2 through fasteners, it is possible to prevent the cable 6 from vibrating and rubbing due to long-term movement with the protective cover 2, thereby causing the cable 6 to detach from the protective cover 2, thereby effectively improving the service life and stability of the cable; the specific positions of the keel drag chain and the cable 6 in the protective cover 2 can also be adjusted according to specific circumstances to perform a variety of level combinations, thereby being suitable for scenarios in different environments in modern industrial production.

[0080] Example 3

[0081] like Figure 1-8 As shown, this embodiment discloses a keel drag chain for protecting light and small cables, comprising: a clamp 1, a protective cover 2, and a keel chain frame; at least two rows of the keel chain frame are symmetrically arranged inside the protective cover 2; the clamp 1 is detachably arranged on the outer surface of the protective cover 2, and is used to stably sleeve the protective cover 2 on the outer side of the keel chain frame;

[0082] The keel chain frame includes at least two keel blocks 3 connected end to end in sequence; the keel block 3 includes a clamping portion and a clamping seat portion, the clamping portion and the clamping seat portion are respectively provided with a clamping hole 301 and a clamping seat hole 302, and the clamping holes 301 and the clamping seat holes 302 of two adjacent keel blocks 3 are connected and fixed by bolts 4;

[0083] The clamping part is provided with a plug-in block 303, and the clamping seat part is provided with an abutment cavity 304, and the plug-in blocks 303 of two adjacent keel blocks 3 are correspondingly inserted into the abutment cavity 304;

[0084] The clamping portion is provided with a positioning seat 305 , and a positioning groove 306 is provided in the clamping seat portion. The positioning seats 305 of two adjacent keel blocks 3 are correspondingly inserted into the positioning groove 306 .

[0085] As a specific implementation, a keel chain consisting of a plurality of keel blocks 3 connected end to end is provided with a protective cover 2 made of rubber material, and the protective cover 2 is an elliptical column structure;

[0086] When assembling the protective cover 2 of the drag chain, several keel blocks 3 connected end to end are connected, and then the protective cover 2 is opened, and the connected keel blocks 3 are passed through the inside of the protective cover 2; when the protective cover 2 and the connected keel blocks 3 are matched to reach a suitable position, the protective cover 2 is shrunk to wrap the keel blocks 3; finally, the protective cover 2 is sealed with Velcro to ensure that the protective cover 2 firmly wraps the connected keel blocks 3.

[0087] The use of a rubber protective cover 2 mounted on the keel block 3 has the following advantages:

[0088] 1. When the protective cover 2 needs to be shrunk to wrap around the keel block 3, the protective cover 2 can be continuously heated by a hot air gun. The molecules inside the rubber will expand due to the heat, but at the same time, the gaps between the molecules will be reduced, resulting in the overall shrinkage of the rubber protective cover 2. This shrinkage can make the rubber protective cover 2 tightly wrap around the keel block 3 to form a tight seal.

[0089] 2. The protective cover 2 can play a certain protective role to prevent the keel block 3 from being scratched, collided, etc.;

[0090] 3. The protective cover 2 is placed on the outer part of the connected keel block 3, which can effectively prevent the adjacent keel blocks 3 from causing friction damage to the cable 6 during bending movement;

[0091] 4. The protective cover 2 can also enable the adjacent keel blocks 3 to change directions freely when performing vertical and horizontal movements, which is more flexible and suitable for different applications;

[0092] 5. The protective cover 2 can also enhance the appearance of the drag chain peripherals, making them more beautiful and making people feel more comfortable;

[0093] 6. When rotational motion occurs between adjacent keel blocks 3, the rubber protective cover 2 can effectively reduce the friction and wear between the keel block 3 and the protective cover 2, so that the keel blocks 3 can slide against each other more smoothly, reducing energy loss and wear.

[0094] How it works

[0095] When assembling the keel, align the plug-in block 303 at the head end of the keel block 3 and embed it into the abutment cavity 304 at the tail end of the other keel block 3, and insert the protruding part of the positioning seat 305 at the head end of the keel block 3 into the positioning groove 306 at the tail end of the other keel block 3, and then connect and fix the clamping hole 301 and the clamping seat hole 302 of the two adjacent keel blocks 3 by bolts 4, and then assemble them according to the required installation length, and finally complete the splicing of the drag chain, which effectively improves the bearing capacity between the joint blocks, thereby improving the bearing capacity between adjacent keel blocks 3, and improving the reliability of the keel drag chain.

[0096] A plurality of "matching limit points" are provided in the connection between the keel blocks 3. Adjacent keel blocks 3 limit their rotation angles by the match of the plug-in block 303 and the abutment cavity 304. Adjacent keel blocks 3 also limit their rotation angles by the match of the positioning seat 305 and the positioning groove 306. Adjacent keel blocks 3 also limit their rotation angles by the match of the step groove 307 and the locking seat 308. Adjacent keel blocks 3 also limit their rotation angles by the match of the limit groove 309 and the limit seat 3010. The plurality of "matching limit points" can improve the stability between the small keel blocks 3, avoid uncontrollable deformation between the small keel blocks 3 under force or dynamic load, reduce the risk of fracture caused by local stress concentration at the chain link connection, and thus improve the stability of the entire keel chain frame.

[0097] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A keel drag chain for protecting light and small cables, characterized in that: include: A clamp (1), a protective cover (2), and a keel chain frame; at least two rows of the keel chain frames are symmetrically arranged inside the protective cover (2); the clamp (1) is detachably arranged on the outer surface of the protective cover (2) and is used to stably sleeve the protective cover (2) on the outer side of the keel chain frame; The keel chain frame comprises at least two keel blocks (3) connected end to end in sequence; the keel block (3) comprises a clamping portion and a clamping seat portion, the clamping portion and the clamping seat portion are respectively provided with a clamping hole (301) and a clamping seat hole (302), and the clamping holes (301) and the clamping seat holes (302) of two adjacent keel blocks (3) are connected and fixed by bolts (4); The clamping portion is provided with a plug-in block (303), the clamping seat portion is provided with an abutment cavity (304), and the plug-in blocks (303) of two adjacent keel blocks (3) are correspondingly inserted into the abutment cavity (304); The clamping portion is provided with a positioning seat (305), and a positioning groove (306) is provided in the clamping seat portion. The positioning seats (305) of two adjacent keel blocks (3) are correspondingly inserted into the positioning groove (306).

2. The keel drag chain for protecting light and small cables according to claim 1, characterized in that: The positioning grooves (306) are symmetrically arranged on the cavity wall of the abutting cavity (304), the positioning seats (305) are symmetrically arranged on both sides of the plug-in block (303), and the positioning seats (305) of two adjacent keel blocks (3) are correspondingly fitted in the positioning grooves (306).

3. The keel drag chain for protecting light and small cables according to claim 1, characterized in that: The clamping portion is also provided with a stepped groove (307), and a clamping seat (308) is provided at the bottom of the clamping seat portion, and the stepped grooves (307) of two adjacent keel blocks (3) are abutted and clamped with the clamping seat (308).

4. The keel drag chain for protecting light and small cables according to claim 1, characterized in that: The clamping portion is also provided with a limiting groove (309), and the top of the clamping seat portion is provided with a limiting seat (3010), and the limiting grooves (309) of two adjacent keel blocks (3) are abutted against the limiting seat (3010) for limiting.

5. The keel drag chain for protecting light and small cables according to claim 1, characterized in that: The abutment cavity (304) is arranged in a rectangular groove-shaped structure, and the abutment cavity (304) is extended from one end of the socket portion away from the clamping portion towards a direction close to the clamping portion.

6. The keel drag chain for protecting light and small cables according to claim 1, characterized in that: The keel chain frame composed of a plurality of keel blocks (3) connected end to end has a length of 4600mm-9000mm and an arc radius of 300mm-700mm.

7. The keel drag chain for protecting light and small cables according to claim 1, characterized in that: The clamp (1) is composed of two layers of clamp blocks (101), and a hinge (102) for flipping and opening is provided between the two layers of clamp blocks (101).

8. The keel drag chain for protecting light and small cables according to claim 7, characterized in that: The clamp (1) is also provided with a clamp connection hole (103), and adjacent clamp blocks (101) are closed by arranging a fastener in the clamp connection hole (103).

9. The keel drag chain for protecting light and small cables according to claim 1, characterized in that: The head end of the keel chain frame is provided with an end chain lock (5), and the end chain lock (5) is provided with an end slot hole (501). The clamp (1) is detachably arranged on the outer surface of the end chain lock (5), and is connected to the end chain lock (5) by passing a fastener through the end slot hole (501).

10. The keel drag chain for protecting light and small cables according to claim 9, characterized in that: The end chain lock (5) is also provided with an end connection column (502), and the end connection column (502) of the end chain lock (5) is detachably connected to the clamping hole (301) and the clamping seat hole (302) of the keel blocks (3) at both ends of the keel chain frame.

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