CN110630689A - Long-distance collapse-preventing drag chain - Google Patents

Abstract

The invention discloses a long-distance collapse-preventing waist drag chain, which comprises a first joint group, a second joint part and a plurality of drag block groups, wherein each drag block group comprises two first chain plates with symmetrical structures and connecting parts respectively arranged on the upper side and the lower side of each first chain plate, the inner side of each first chain plate is provided with a connecting groove, one end of each first chain plate extends to form a connecting block, the connecting blocks are matched with the connecting grooves, each first chain plate is also provided with an arc-shaped boss and an arc-shaped concave table, each arc-shaped boss is fixedly connected with a supporting column, each arc-shaped concave table is provided with a supporting hole, the supporting columns are matched with the supporting holes so as to facilitate lever support and opening and closing among the plurality of drag block groups, the two ends of each connecting part are respectively provided with a fixing groove, the inner walls on the upper side and the lower side. According to the invention, the towing block group is opened and closed through the supporting columns, so that the bearing gravity between the towing block groups is converted into the longitudinal tension at the lower part and the jacking force at the upper part, and the effects of no waist collapse, no dislocation and no fracture of the towing chain are achieved.

Description

Long-distance collapse-preventing drag chain

Technical Field

The invention belongs to the technical field of drag chain equipment, and particularly relates to a long-distance waist collapse prevention drag chain.

Background

At present, the drag chain has been widely used in a great deal of fields such as digit control machine tool, stone material machinery, glass machinery, door and window machinery, injection molding machine, manipulator, jack-up transportation equipment, automatic storehouse, the drag chain can play the effect of drawing and protecting to built-in cable of machinery, oil pipe, trachea, water pipe etc. makes the whole more pleasing to the eye that looks of machinery simultaneously. The drag chain in the prior art is formed by connecting a plurality of drag block groups, and when the drag chain is used, the drag chain can be divided into three parts according to the motion state: the lower section of the drag chain, the turning ring section and the upper section of the drag chain. The existing drag chain is small in hanging bearing capacity, when the length of the drag chain is long, the drag chain can be bent to different degrees under the action of the self weight and the built-in cables and pipelines, and the built-in cables and pipelines of the drag chain can be damaged by the bending phenomenon. If the drag chain is stressed too much, the upper section of the drag chain is even superposed on the lower section of the drag chain, which is commonly called as waist collapse, if the upper section of the drag chain continuously rubs with the lower section of the drag chain for a long time, not only can the built-in line be damaged, but also the drag chain can be seriously worn, the phenomena of disconnection and fracture of the drag chain are caused, and the service life of the drag chain is seriously shortened.

The existing solutions to the above technical problems are generally: a follow-up supporting mechanism which moves along with the drag chain is arranged below the long-distance drag chain to support the long-distance drag chain and avoid the waist collapse phenomenon. Although the technical problem that the towline collapses the waist has been solved to the follow-up supporting mechanism, for long distance towline, it is also longer with its complex towline follow-up support length, the follow-up support of this kind of long distance towline not only is expensive, the later stage management degree of difficulty is big, and stable not high, the very easy trouble that appears, and follow-up supporting mechanism only is fit for long distance towline and moves under low-speed state, when long distance towline reciprocating motion under high-speed state, can cause the phenomenon that the towline part is disjointed, and under long-time high-speed state motion state, follow-up supporting mechanism is great to the wearing and tearing of towline, can seriously influence the operational reliability of towline, shorten the life of towline.

Therefore, how to design a drag chain which does not collapse waist, has long service life and ensures quality in long-distance turnover work becomes a technical problem which needs to be solved urgently.

Disclosure of Invention

The invention aims to provide a long-distance waist collapse prevention drag chain to solve the problems mentioned in the background technology.

In order to realize the purpose of the invention, the technical scheme is as follows:

a long-distance collapse-preventing waist drag chain comprises a plurality of drag block groups, a first joint piece and a second joint piece, wherein the drag block groups are arranged between the first joint piece and the second joint piece and are respectively connected with the first joint piece and the second joint piece, the drag block groups are in limited hinge joint between the head and the tail, each drag block group comprises two first chain plates with symmetrical structures and symmetrical positions and connecting pieces which are respectively arranged on the upper side and the lower side of each first chain plate and are used for connecting the first chain plates and bearing cables or pipelines, the inner side of each first chain plate is provided with a connecting groove, one end of each first chain plate extends to form a connecting block, the connecting block and the first chain plates are integrally formed, the connecting block is matched with the connecting groove and is in sliding connection with the connecting groove, and an arc-shaped boss is arranged below the inner side of each first chain plate and close to the connecting groove, an arc concave station is arranged at one end of the first chain plate and close to the connecting block, the arc convex station is matched with the arc concave station, a supporting column is fixedly connected to the arc convex station, a supporting hole is formed in the arc concave station, the supporting column is matched with the supporting hole, so that lever support and opening and closing among the dragging blocks are facilitated, fixing grooves are formed in two ends of the connecting piece, fixing columns are fixedly connected to the inner walls of the upper side and the lower side of the first chain plate and are sleeved in the fixing grooves, therefore, the dragging block groups are opened and closed through the supporting columns, bearing gravity among the dragging block groups is converted into longitudinal tension of the lower portion and jacking force of the upper portion, the strength and the bearing capacity of the dragging chain are improved, and deformation and waist collapse of the dragging chain are effectively prevented.

The invention is further configured to: the outer side of the first chain plate is located a limiting block is arranged at the connecting block, a fan-shaped limiting groove is formed in the inner side of the first chain plate and close to the connecting groove, and the limiting block slides in the fan-shaped limiting groove and is abutted to the inner walls of the groove bodies on the two sides of the fan-shaped limiting groove respectively.

The invention is further configured to: first joint spare includes two structure symmetries and position symmetry's second link joint, two the second link joint is through being located its upper and lower side connecting piece fixed connection, the joint groove has been seted up to the inboard of second link joint, the joint groove with the connecting block phase-match the inboard of second link joint is close to joint groove department is equipped with the joint boss, connect boss and arc concave station phase-match, fixedly connected with joint post on the joint boss, the joint post with the supported hole phase-match, so that drag the block group with lever support between the first joint spare with open the closure.

The invention is further configured to: one end, far away from the dragging block group, of the second chain plate is provided with a first clamping groove used for being connected with external equipment, and the first clamping groove and the second chain plate are integrally formed.

The invention is further configured to: the second connects the piece and includes the third link joint of two structure symmetries and position symmetry, two the third link joint is through being located its downside connecting piece fixed connection, the joint piece has been seted up to the inboard of third link joint, the joint piece with the spread groove phase-match the outside of third link joint is close to joint piece department is equipped with and connects the concave station, connect concave station and arc boss phase-match, connect and seted up the joint hole on the concave station, connect the hole with the support column phase-match, so that drag the group with lever support between the second connects the piece and opens the closure.

The invention is further configured to: and one end of the third chain plate, which is far away from the dragging block group, is provided with a second clamping groove for connecting external equipment, and the second clamping groove and the third chain plate are integrally formed.

The invention is further configured to: the fixing column is integrally connected with a clamping block, clamping grooves are symmetrically formed in the fixing grooves in the connecting piece and located at the two ends of the connecting piece, and the clamping grooves are clamped with the clamping block.

The invention is further configured to: the positioning device is characterized in that a positioning groove is formed in one side edge of the connecting groove, a positioning block is arranged on one side edge of the connecting block, and the positioning groove and the positioning block are both designed in an arc shape and are matched with each other.

The invention is further configured to: the first chain plate and the connecting piece are both formed by one-time injection molding.

The invention is further configured to: the outer side of the first chain plate is provided with a first sliding groove close to the arc-shaped concave platform, the inner side of the first chain plate is provided with a first sliding block close to the arc-shaped convex platform, and the first sliding block is matched with the first sliding groove.

In summary, compared with the prior art, the long-distance collapse-prevention waist towing chain disclosed by the invention comprises a first joint piece, a second joint piece and a plurality of towing block groups, wherein the first joint piece and the second joint piece are used for external connection, the towing block groups are arranged between the first joint piece and the second joint piece and are hinged end to end, each towing block group comprises a first chain plate and a connecting piece, the connecting pieces are used for fixing the first chain plates which are mirror images of each other, an arc-shaped boss arranged below the inner side of each first chain plate is matched with a connecting piece extending to one end of each first chain plate so as to facilitate the end to end connection of the first chain plates among the towing block groups, meanwhile, a supporting column is fixedly connected to each arc-shaped boss, a supporting hole is formed in each arc-shaped recess, the supporting column is matched with the supporting hole, namely, the hinging among the first chain plates is realized through the arrangement, and under the matching of the arc-shaped bosses, the support columns positioned on the lower side of the first chain plate are used as fulcrums, limiting opening, closing and turning among the plurality of the towing block groups are achieved, vertical gravity borne by the connecting piece is shared, then the towing chain is prevented from collapsing, and the service life of the towing chain is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic overall structure diagram of a long-distance waist collapse prevention towline provided by the embodiment;

fig. 2 is a schematic diagram of an overall structure of the group of dragging blocks provided in this embodiment;

fig. 3 is a schematic view of the overall structure of the first joint member provided in the present embodiment;

fig. 4 is a schematic view of the overall structure of the second joint member provided in the present embodiment;

fig. 5 is a schematic overall structure diagram of the first link plate provided in the present embodiment;

fig. 6 is a schematic view of the overall structure of the first link plate in another direction according to the present embodiment.

Reference numerals: 1. a first link plate; 11. connecting grooves; 12. connecting blocks; 13. an arc-shaped boss; 131. a support pillar; 132. a first slider; 14. an arc-shaped concave platform; 141. a support hole; 142. a first chute; 15. fixing a column; 151. a clamping block; 16. a limiting block; 17. a fan-shaped limiting groove; 171. the inner wall surface of the limiting groove; 18. positioning a groove; 19. positioning blocks; 2. a connecting member; 21. fixing grooves; 211. a card slot; 3. a second link plate; 31. a joint groove; 32. a connector boss; 321. a connector post; 33. a first clamping groove; 4. a third link plate; 41. a joint block; 42. a joint recess; 421. a joint bore; 43. a second clamping groove; 100. dragging the block group; 200. a first joint member; 300. a second joint member.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples, it being understood that the specific examples described herein are only for the purpose of illustrating the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the present invention described above can be combined with each other as long as they do not conflict with each other.

A long-distance waist collapse prevention drag chain comprises a plurality of drag block groups 100, a first joint piece 200 and a second joint piece 300, wherein the plurality of drag block groups 100 are arranged between the first joint piece 200 and the second joint piece 300 and are respectively connected with the first joint piece 200 and the second joint piece 300, the plurality of drag block groups 100 are in limited hinge joint between the head and the tail, the drag block groups 100 comprise two first chain plates 1 which are symmetrical in structure and position and connecting pieces 2 which are respectively arranged at the upper side and the lower side of the first chain plates 1 and are used for connecting the first chain plates 1 and bearing cables or pipelines, the inner sides of the first chain plates 1 are provided with connecting grooves 11, one ends of the first chain plates 1 extend to form connecting blocks 12, the connecting blocks 12 are integrated with the first chain plates 1, the connecting blocks 12 are matched with the connecting grooves 11 and are in sliding connection with the connecting grooves 11, arc-shaped bosses 13 are arranged below the inner sides of the first chain plates 1 and close to the connecting grooves 11, an arc concave table 14 is arranged at one end of the first chain plate 1 and close to the connecting block 12, the arc convex table 13 is matched with the arc concave table 14, wherein a supporting column 131 is fixedly connected to the arc convex table 13, a supporting hole 141 is formed in the arc concave table 14, and the supporting column 131 is matched with the supporting hole 141, so that lever support and opening and closing among the plurality of mop groups 100 are facilitated.

In the specific implementation process, the first joint piece 200 and the second joint piece 300 are respectively connected with external equipment, the plurality of end-to-end connected dragging block groups 100 are located between the first joint piece 200 and the second joint piece 300, a cable or a pipeline is borne by the connecting piece 2, the two ends of the connecting piece 2 are fixedly connected with the first chain plates 1 which are symmetrically arranged, wherein the two ends of the connecting piece 2 are respectively provided with fixing grooves 21, the upper and lower inner walls of the first chain plates 1 are fixedly connected with fixing columns 15, and the fixing columns 15 are sleeved in the fixing grooves 21, so that the connection relation between the connecting piece 2 and the first chain plates 1 is reinforced.

It should be noted that, the fixing column 15 is integrally connected with the fixture block 151, the fixing slots on the connecting member 2 and located at the two ends of the connecting member are symmetrically provided with the clamping slots 211, and the clamping slots 211 are clamped with the fixture block 151, that is, by this arrangement, the firmness between the connecting member 2 and the first link plate 1 is further enhanced, the bearing capacity of the mop block assembly 100 is improved, and the practicability thereof is improved.

As shown in fig. 2, 5 and 6, the connecting groove 11 formed at the inner side of the first link plate 1 is matched and slidably connected with the connecting block 12 formed at one end of the first link plate 1 to realize the end-to-end connection between the plurality of tow block sets 100, wherein the arc-shaped boss 13 at the inner side of the first link plate 1 close to the connecting groove 11 is matched with the arc-shaped recess 14 close to the connecting block 12 to assist the sliding of the connecting groove 11 and the connecting block 12, so that the plurality of tow block sets 100 are more closely matched, and meanwhile, the supporting pillar 131 fixedly connected to the arc-shaped boss 13 is matched with the supporting hole 141 formed on the arc-shaped recess 14, that is, the supporting pillar 131 is used as a fulcrum and a rotation point to provide lever support for the tow block sets 100, and the supporting pillar 131 is used as a shaft to open and close the first link plate 1, so as to realize the rotation between the plurality of tow.

In the specific implementation process, be equipped with stopper 16 in the outside of first link joint 1 and be located connecting block 12 department, fan-shaped spacing groove 17 has been seted up in the inboard of first link joint 1 and near spread groove 11 department, stopper 16 slides in fan-shaped spacing groove 17 and respectively with the spacing inslot face 171 butt of fan-shaped spacing groove 17 both sides, when a plurality of tow block groups 100 need to turn because of the external environment, realize spacing the turning of tow block group 100 through the stopper 16 with fan-shaped spacing groove 17 assorted, and then reach spacing articulated purpose, simultaneously, through stopper 16 and spacing inslot face 171 butt, and the support with support column 131 is cooperated, the realization will tow the longitudinal tension and the top force on upper portion that the weight that bears between the block group 100 converts into its lower part into, increase tow chain intensity and bearing capacity, effectively prevent that the tow chain warp and waist collapses.

It should be noted that the specific curvature of the fan-shaped limiting groove 17 depends on the specific application environment, and the specific curvature of the fan-shaped limiting groove 17 is not limited herein.

It should be noted that the arc-shaped boss 13 is located below the inner side of the first chain plate 1, that is, the supporting column 131 is located below the inner side of the first chain plate, and the supporting column 131 provided therein ensures that the supporting column 131 below the first chain plate 1 is supported, and the upper connecting groove 11 and the connecting block 12 are opened and closed, so as to share the gravity of the cable or pipeline carried by the connecting member 2, and transfer part of the gravity into the longitudinal tension between the first chain plates 1, thereby improving the overall load capacity of the drag chain, and preventing the drag chain from collapsing and deforming.

As shown in fig. 1 and 3, the first joint member 200 includes two second link plates 3 with symmetrical structures and symmetrical positions, the two second link plates 3 are fixedly connected by the connecting members 2 located at the upper and lower sides of the two second link plates 3, the inner side of the second link plate 3 is provided with a joint groove 31, the joint groove 31 is matched with the connecting block 12, a joint boss 32 is arranged at the inner side of the second link plate 3 and near the joint groove 31, the joint boss 32 is matched with the arc-shaped boss 14, the joint column 321 is fixedly connected to the joint boss 32, and the joint column 321 is matched with the support hole 141, so as to facilitate lever support and opening and closing between the slipper block set 100 and the first joint member 200.

Further, one end of the second link plate 3 away from the dragging block group 100 is provided with a first clamping groove 33 for connecting with external equipment, and the first clamping groove 33 and the second link plate 3 are integrally formed, so as to enhance the connection strength of the first joint element 200.

In the specific implementation process, the joint groove 31, the joint boss 32 and the joint column 321 correspondingly play roles of connecting the groove 11, the arc boss 13 and the support column 131, and the purpose is to stabilize the matching relationship between the first joint piece 200 and the tow block group 100, so that under the support of the joint column 321, effective opening and closing between the first joint piece 200 and the tow block group 100 is ensured, and partial gravity falling pressure of the tow chain load is further shared.

As shown in fig. 1 and 4, the second joint element 300 includes two third link plates 4 with symmetrical structures and symmetrical positions, the two third link plates 4 are fixedly connected by the connecting members 2 located at the upper and lower sides thereof, the inner side of the third link plate 4 is provided with a joint block 41, the joint block 41 is matched with the connecting groove 11, a joint concave table 42 is arranged at the outer side of the third link plate 4 and near the joint block 41, the joint concave table 42 is matched with the arc-shaped boss 13, the joint concave table 42 is provided with a joint hole 421, and the joint hole 421 is matched with the supporting column 131, so that the lever between the mop group 100 and the second joint element 300 is supported and opened and closed.

Further, a second clamping groove 43 for connecting external equipment is arranged at one end of the third chain plate 4 away from the dragging block group 100, and the second clamping groove 43 and the third chain plate 4 are integrally formed, so that the connection strength of the second joint piece 300 is enhanced.

In the implementation process, the joint block 41, the joint recess 42 and the joint hole 421 correspondingly play roles of the connecting block 12, the arc recess 14 and the support hole 141, so as to stabilize the matching relationship between the second joint 300 and the tow block set 100, so as to ensure effective opening and closing between the second joint 300 and the tow block set 100 under the support of the support column 131, and further share part of the gravity weight of the tow chain load.

The first link plate 1 and the connecting member 2 are both formed by one-time injection molding.

As shown in fig. 5 and 6, a positioning groove 18 is provided at one side edge of the connecting groove 11, a positioning block 19 is provided at one side edge of the connecting block 12, the positioning groove 18 and the positioning block 19 are both designed in an arc shape and matched, i.e., the positioning groove and the positioning block are arranged, so that the connecting groove 11 between a plurality of first chain plates 1 and the connecting block 12 can be accurately matched in the opening and closing process, meanwhile, the firmness degree between the first chain plates 1 can be deepened, on the premise of matching the fan-shaped limiting groove 17 and the limiting block 16, the connecting groove 11 and the connecting block 12 are guided to slide mutually, and the connection between a plurality of mop groups 100 is ensured to be tight, and the mop is stably bent.

Further, the first sliding groove 142 is arranged at the outer side of the first chain plate 1 and close to the arc-shaped concave table 14, the first sliding block 132 is arranged at the inner side of the first chain plate 1 and close to the arc-shaped convex table 13, the first sliding block 132 is matched with the first sliding groove 142, namely, through the arrangement, the matching relation among a plurality of first chain plates 1 is further strengthened, and on the basis that the supporting column 131 is matched with the supporting hole 141, the connecting groove 11 and the connecting block 12, the limiting block 16 and the fan-shaped limiting groove 17, the positioning groove 18 and the positioning block 19, the first sliding block 132 and the first sliding groove 142 are sequentially used for strengthening the plurality of first chain plates 1, and the connecting relation among a plurality of drag block groups 100 improves the connecting strength and the assembling strength of the drag chain, improves the bearing capacity of the drag chain, and improves the practicability of the drag chain.

In conclusion, the invention has the following beneficial effects: the invention discloses a long-distance waist collapse prevention drag chain, which comprises a plurality of drag block groups 100, wherein the plurality of drag block groups 100 are respectively connected with a first joint piece 200 and a second joint piece 300, and the plurality of drag block groups 100 are in limited hinge joint between the head and the tail, wherein the drag block groups 100 comprise a first chain plate 1 and a connecting piece 2, the first chain plate 1 is provided with a connecting groove 11 and a connecting piece 12, the connecting groove 11 is matched with the connecting piece 12 and slides mutually, an arc boss 13 is arranged at the connecting groove 11, an arc concave table 14 is arranged at the connecting piece 12, the arc boss 13 is matched with the arc concave table 14, wherein a supporting column 131 is fixedly connected on the arc boss 13, a supporting hole 141 is arranged on the arc concave table 14, the supporting column 131 is matched with the supporting hole 141, further, the first chain plate 1 is also provided with a limiting block 16 and a fan-shaped limiting groove 17, the limiting block 16 slides in the fan-shaped limiting groove 17 and is respectively, namely, through the above arrangement, under the condition that the drag chain is correspondingly bent and deformed along with the displacement of the environment and the equipment during the operation, the drag chain is supported by the supporting column 131, the bending between the two drag block groups 100 is guided by the sliding of the limiting block 16 in the fan-shaped limiting groove 17, the first joint member 200 and the second joint member 300 also apply the principle, so as to realize the opening and closing between the connecting groove 11 and the connecting block 12, the bending angle between the drag block groups 100 is limited by the abutting of the limiting block 16 and the inner walls of the groove bodies at the two sides of the fan-shaped limiting groove 17, so as to realize the limiting and hinging among the multiple drag block groups 100, namely, the supporting column 131 is used as a lever support to realize the limited bending, thereby avoiding the excessive deformation of the drag chain caused by the excessive bending angle of the drag block group 100, causing the damage of the cable or the pipeline carried by the connecting member 2, avoiding the mistaken friction among the drag block groups, the problems of drag chain sagging, falling and breaking are solved, and the service life of the drag chain is prolonged.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. The utility model provides a long distance prevents waist tow chain that collapses, includes a plurality of group, first joint spare and the second joint spare of dragging, and is a plurality of it locates to drag the block group first joint spare with between the second joint spare and respectively with first joint spare with the second joint spare is connected, and is a plurality of drag spacing articulated, its characterized in that between the group head and the tail of dragging: the dragging block group comprises two first chain plates which are symmetrical in structure and position and connecting pieces which are respectively arranged on the upper side and the lower side of the first chain plates and are used for connecting the first chain plates and bearing cables or pipelines, the inner side of each first chain plate is provided with a connecting groove, one end of each first chain plate extends to form a connecting block, the connecting block and the first chain plates are integrally formed, the connecting block is matched with the connecting groove and is in sliding connection with the connecting groove, an arc-shaped boss is arranged below the inner side of each first chain plate and close to the connecting groove, an arc-shaped concave table is arranged at one end of each first chain plate and close to the connecting block, the arc-shaped boss is matched with the arc-shaped concave table, wherein a supporting column is fixedly connected onto the arc-shaped boss, a supporting hole is formed in the arc-shaped concave table, the supporting column is matched with the supporting hole, and the lever among the dragging block groups can be supported and, fixing grooves are respectively formed in two ends of the connecting piece, fixing columns are fixedly connected to the inner walls of the upper side and the lower side of the first chain plate and are sleeved in the fixing grooves, and therefore the supporting columns are used for opening and closing the towing block groups, the bearing gravity among the towing block groups is converted into the longitudinal tension of the lower portion and the jacking force of the upper portion of the towing block groups, the strength and the bearing capacity of the towing chain are improved, and the towing chain is effectively prevented from deforming and collapsing.

2. The long-distance collapse-preventing drag chain as claimed in claim 1, wherein a limiting block is disposed at the outer side of the first link plate and at the connecting block, a fan-shaped limiting groove is disposed at the inner side of the first link plate and near the connecting groove, and the limiting block slides in the fan-shaped limiting groove and abuts against the inner walls of the groove bodies at two sides of the fan-shaped limiting groove.

3. The long-distance waist collapse prevention drag chain of claim 1, wherein said first joint member comprises two second link plates with symmetrical structure and symmetrical position, said two second link plates are fixedly connected by said connecting member located at the upper and lower sides thereof, a joint groove is formed at the inner side of said second link plate, said joint groove is matched with said connecting block, a joint boss is formed at the inner side of said second link plate and near said joint groove, said joint boss is matched with said arc-shaped concave table, a joint column is fixedly connected to said joint boss, said joint column is matched with said support hole, so as to facilitate lever support and opening and closing between said drag block set and said first joint member.

4. The long-distance waist collapse prevention drag chain of claim 3, wherein an end of said second link plate away from said drag block set is provided with a first catching groove for connecting an external device, said first catching groove being formed integrally with said second link plate.

5. The long-distance waist collapse prevention drag chain of claim 1, wherein said second joint member comprises two third link plates with symmetrical structure and symmetrical position, two of said third link plates are fixedly connected by said connecting members located at the upper and lower sides thereof, a joint block is disposed at the inner side of said third link plate, said joint block is matched with said connecting groove, a joint concave table is disposed at the outer side of said third link plate and near said joint block, said joint concave table is matched with said arc-shaped convex table, a joint hole is disposed on said joint concave table, said joint hole is matched with said supporting column, so as to facilitate the lever support and opening and closing between said drag block set and said second joint member.

6. The long-distance waist-collapse preventing drag chain of claim 5, wherein an end of said third link plate away from said drag block set is provided with a second catching groove for connecting an external device, said second catching groove being formed integrally with said third link plate.

7. The long-distance collapse-preventing towline as claimed in claim 1, wherein the fixing post is integrally connected with a clamping block, the connecting piece is symmetrically provided with clamping grooves at fixing grooves at two ends thereof, and the clamping grooves are clamped with the clamping block.

8. The long-distance waist collapse prevention drag chain as claimed in claim 1, wherein a positioning groove is formed at one side edge of the connecting groove, a positioning block is arranged at one side edge of the connecting block, and the positioning groove and the positioning block are both in arc design and matched.

9. The long distance collapse preventing drag chain of claim 1, wherein said first link plate and said connecting member are injection molded in one step.

10. The long distance waist collapse preventing drag chain of claim 1, wherein a first sliding groove is provided at an outer side of said first link plate near said arc-shaped concave platform, and a first sliding block is provided at an inner side of said first link plate near said arc-shaped convex platform, said first sliding block being matched with said first sliding groove.

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