CN220517137U

CN220517137U - Tensioning connection assembly, tensioning device and tensioning machine

Info

Publication number: CN220517137U
Application number: CN202322040309.0U
Authority: CN
Inventors: 马进元; 林建煌; 袁文军
Original assignee: Tangshi Jianhua Construction Materials Shanghai Co Ltd
Current assignee: Tangshi Jianhua Construction Materials Shanghai Co Ltd
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-02-23
Anticipated expiration: 2033-07-31

Abstract

The application relates to a tensioning connection assembly, a tensioning device and a tensioning machine. The tensioning machine comprises a tensioning device, the tensioning device comprises a tensioning connecting assembly, the tensioning connecting assembly comprises a tensioning head, a sleeve and an unlocking piece, one end of the sleeve in the axial direction of the tensioning device is connected with a tensioning rod of the tensioning device, the tensioning head is detachably and coaxially connected with the sleeve, the unlocking piece is pluggable and inserted into the sleeve and props against the tensioning head, so that the tensioning head and the sleeve are mutually locked, the unlocking piece can be pulled out of the sleeve under the action of external force, the tensioning head can be separated from the sleeve after rotating by an angle around the central axis of the tensioning head relative to the sleeve, the tensioning head can be rapidly detached from the sleeve without an external tool, the piece to be tensioned, which is meshed with the tensioning head, can also be rapidly detached from the tensioning machine, the dismounting time is saved, the dismounting efficiency is improved, the fault can be rapidly removed when the tensioning machine breaks down, and the phenomenon that the whole production line is rapidly stalled for a long time is avoided.

Description

Tensioning connection assembly, tensioning device and tensioning machine

Technical Field

The application relates to the technical field of building pipe pile production, in particular to a tensioning connection assembly, a tensioning device and a tensioning machine.

Background

The tubular pile is widely applied to the fields of bridge construction and the like, and the production process of the tubular pile specifically comprises the following steps: the production is carried out by utilizing a pipe pile die (hereinafter referred to as a pipe die), firstly pouring concrete into a bottom die of the pipe pile die, then covering a cover die, fixing the cover die and the bottom die through bolts, then carrying out a series of procedures, and finally demoulding to finish the production of the pipe pile. In order to enable the prepared pipe pile to bear higher load in the use process, a prestress tensioning step is required to be added when the concrete pipe pile is produced, specifically, a tensioning connecting assembly of a tensioning machine is meshed with a tensioning screw of a pipe die, so that the tensioning machine can stretch a steel reinforcement cage in the pipe die, the steel reinforcement cage is kept in a stretched state in the subsequent process step, and the load capacity of the prepared pipe pile is improved.

However, in the existing stretching machine in the market, once the stretching connecting assembly is meshed with the stretching screw rod to be blocked, the pipe die and the stretching connecting assembly are not easy to detach, and the stretching connecting assembly is not easy to detach from the stretching machine, so that even if the stretching connecting assembly can be detached, the stretching connecting assembly also needs to be detached by using a detaching tool such as a wrench, so that the stretching machine not only consumes the detaching time, but also has high labor intensity, and is difficult to meet the production requirements. In particular, when a tensioning machine fails, once a pipe die or a tensioning connection kit cannot be quickly detached from the tensioning machine, the failure cannot be handled, resulting in a stop of the whole production line, and therefore, it is necessary to develop a tensioning connection assembly that can be quickly detached from the tensioning machine without the aid of external tools.

Disclosure of Invention

Accordingly, it is necessary to provide a tension connection assembly, a tension device including the tension connection assembly, and a tension machine including the tension device, which can overcome the problems described above, in order to solve the problems that the existing tension connection assembly is difficult to be detached from the tension machine, and the failure cannot be handled quickly once the tension machine fails.

According to one aspect of the present application, there is provided a tension connection assembly comprising:

the tensioning head is meshed with the piece to be tensioned so as to tension the piece to be tensioned;

one end of the sleeve along the axial direction of the sleeve is used for connecting a tension rod, and the other end of the sleeve is detachably and coaxially connected with the tension head;

the unlocking piece is inserted into the sleeve in a pluggable manner and is propped against the tensioning head, so that the tensioning head and the sleeve are mutually locked, and the tensioning connection assembly is in a locking state; the unlocking piece can be pulled out of the sleeve under the action of external force, so that the tensioning head can rotate around the central axis of the tensioning head for a certain angle relative to the sleeve and then is separated from the sleeve, and the tensioning connection assembly is in an unlocking state.

In one embodiment, the sleeve is provided with a containing cavity, a jack with a diameter smaller than that of the containing cavity and communicated with the containing cavity is formed in one side of the sleeve in the axial direction, a plurality of grooves which are arranged at intervals along the circumferential direction of the jack and communicated with the containing cavity are formed in the inner circumferential surface of the jack, a plurality of convex blocks which are arranged at intervals are formed in the outer circumferential surface of the tensioning head, a plurality of unlocking pieces are correspondingly arranged, a plurality of convex blocks and a plurality of unlocking pieces are adjacently and alternately arranged along the circumferential direction of the sleeve, and at least part of each convex block and each unlocking piece are arranged in the containing cavity and each convex block is abutted against the adjacent unlocking piece and the side wall of the containing cavity;

all unlocking pieces can be taken out of the sleeve through the grooves, so that after the tensioning head rotates for an angle relative to the sleeve, the convex blocks can be positioned in the corresponding grooves, and can exit the accommodating cavity through the grooves so as to enable the tensioning head to be separated from the sleeve.

In one embodiment, each unlocking piece comprises a bolt and a cushion block, the cushion blocks are mutually aligned with the corresponding groove, and the bolts penetrate through the wall of the sleeve from the outer circumferential surface of the sleeve and are abutted against the tensioning head so as to prevent the cushion blocks from being separated from the accommodating cavity through the grooves.

In one embodiment, a screw hole for engaging with the stretching machine is formed at the end of the stretching head, a mud removing groove communicated with the screw hole is formed in the outer circumferential surface of the stretching head, and the mud removing groove is used for scraping soil on the stretching screw rod in the process that the stretching head is engaged with the stretching screw rod of the stretching piece to be stretched, and enabling the soil to be discharged from the mud removing groove.

In one embodiment, the outer circumferential surface of the sleeve is provided with a through hole communicated with the accommodating cavity, and the through hole is used for inserting a hand or a tool so that the cushion block can be pulled out of the accommodating cavity.

According to another aspect of the present application, there is provided a tensioning device comprising:

the machine shell is provided with a machine tail end and a machine head end which are oppositely arranged in the axial direction of the machine shell;

a tension rod, which is movably and coaxially inserted into the casing along one axial end;

the tensioning connection assembly is connected to one end of the shell, the tensioning rod is inserted into one end of the shell, and can rotate around the central axis of the shell relative to the shell and advance along the axial direction so that the tensioning connection assembly is meshed with the piece to be tensioned, or can retreat along the axial direction relative to the shell so that the tensioning connection assembly stretches the piece to be tensioned.

In one embodiment, the casing comprises a casing body and a piston rod which are coaxially arranged, the casing body is provided with a cavity penetrating through two opposite ends of the casing body in the axial direction, the piston rod is movably inserted into the cavity and seals the tail end of the casing body, and the piston rod is provided with a piston hole penetrating through two opposite ends of the casing body in the axial direction;

when the tensioning connection assembly is meshed with the tensioning screw rod of the piece to be tensioned, the tensioning rod rotates around the central axis of the machine body and the piston rod independently and advances along the axial direction;

when the stretching rod stretches the piece to be stretched, the stretching connecting component is meshed with the piece to be stretched, and the stretching connecting component, the stretching rod and the piston rod are together retracted relative to the machine body along the axial direction.

In one embodiment, the tensioning device further comprises a tail nut fixedly connected to one end of the piston rod away from the head end, the tensioning rod sequentially penetrates through the tail nut and the piston rod and is in threaded connection with the tail nut, and the tensioning rod can rotate around the central axis of the tensioning rod in a controllable manner and simultaneously moves independently along the axial direction under the transmission of the threaded connection.

In one embodiment, the tensioning device further comprises a pull rope displacement sensor, one end of the pull rope displacement sensor is arranged on the casing, the other end of the pull rope displacement sensor is connected to the piston rod, and the pull rope displacement sensor is used for detecting the displacement of the piston rod relative to the casing.

According to a further aspect of the application, there is provided a tensioning machine comprising a frame, a driving unit and a tensioning device as described above, wherein the driving unit and the tensioning device are arranged on the frame, part of the driving unit is in transmission connection with the frame, the rest of the driving unit is in transmission connection with the tensioning device, and the driving unit can drive the frame and the tensioning device to move along an X axis and/or a Y axis which extend horizontally and are mutually perpendicular together, and can also drive the tensioning device to move along a Z axis which extends vertically independently.

According to the tensioning connection assembly, the tensioning head used for being connected with the piece to be tensioned is connected with the sleeve, and the unlocking piece is arranged to be inserted into the sleeve in a pluggable mode and is propped against the tensioning head, so that the tensioning head and the sleeve can be locked with each other, and the tensioning connection assembly is in a locking state when the tensioning piece works normally; when the tensioning machine breaks down, the unlocking piece can be pulled out of the sleeve under the action of external force, so that the tensioning head can rotate around the central axis of the tensioning head by a certain angle relative to the sleeve and then is separated from the sleeve, and the tensioning connection assembly is in an unlocking state. Therefore, the tensioning head can be quickly detached from the sleeve without an external tool, the piece to be tensioned meshed with the tensioning head can be quickly detached from the tensioning machine, and the tensioning head can be quickly installed on the sleeve to be in a locking state again after the fault is relieved, so that the dismounting time is saved, the dismounting efficiency is improved, the fault can be quickly removed when the tensioning machine breaks down, and the phenomenon that the whole production line is stopped for a long time is avoided.

Drawings

Fig. 1 is an isometric view of a tensioner according to an embodiment of the present application.

Fig. 2 is an isometric view of a tensioning device according to an embodiment of the present application.

Fig. 3 is a cross-sectional view of a housing portion structure according to an embodiment of the present application.

Fig. 4 is a side view of a tension rod and tail member and an axial side view of a connection to a tension connection assembly according to an embodiment of the present disclosure.

Fig. 5 is an exploded view of a tension connection assembly provided in an embodiment of the present application.

Reference numerals illustrate:

10. a stretching machine; 100. a frame; 200. a tensioning device; 201. a head end; 202. a tail end of the machine; 210. a housing; 211. a body; 2111. a cavity; 2112. a jack cylinder; 2113. a nose part; 212. a piston rod; 2121. a piston bore; 213. a linear bearing; 220. a tension rod; 230. tensioning the connecting assembly; 231. stretching the head; 2311. a bump; 2312. a screw hole; 2313. a mud removing groove; 232. a sleeve; 2321. a receiving chamber; 2322. a jack; 2323. a groove; 2324. a through hole; 233. an unlocking member; 2331. a bolt; 2332. a cushion block; 240. a tail part; 250. a pull rope displacement sensor; 260. a tail nut; 270. a mounting base; 280. a guide shaft; 300. a driving unit; 40. a pipe die; 41. stretching the screw.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The application provides a stretch-draw coupling assembling, stretching device and stretch-draw machine, wherein the stretch-draw machine includes stretching device, and stretching device includes stretch-draw coupling assembling. The tensioning device is used for pulling the piece to be tensioned to retreat to complete automatic tensioning, so that the prepared piece to be tensioned can bear higher load in the use process, and the tensioning connection assembly is used for being meshed with a tensioning screw of the piece to be tensioned, so that the piece to be tensioned can be connected with the tensioning device.

The structure of the tensioning connection assembly, the tensioning device and the tensioning machine in the present application will be described below by taking a piece to be tensioned as a pipe pile die (hereinafter referred to as a pipe die). It will be appreciated that in other embodiments, the stretching machine and the stretching device of the present application are not limited to stretching only the pipe die, but may also stretch any other piece to be stretched, and the stretching connection assembly is not limited to use in the pipe die stretching machine, and may be used in any device having a stretching function, which is not limited herein.

Referring to fig. 1, fig. 1 shows an overall structure schematic diagram of a tensioning machine 10 according to an embodiment of the present application, where the tensioning machine 10 provided in an embodiment of the present application includes a frame 100, a tensioning device 200 and a driving unit 300, where the tensioning device 200 is installed on the frame 100 and is used to engage with and tension a tensioning screw 41 of a pipe die 40, and the driving unit 300 is partially connected to the frame 100 and partially connected to the tensioning device 200 in a transmission manner, and is used to drive the frame 100 and the tensioning device 200 to move along an X-axis and/or a Y-axis that extend horizontally and are perpendicular to each other together with respect to the pipe die 40 and drive the tensioning device 200 to move along a Z-axis that extends vertically alone with respect to the frame 100, so that the tensioning device 200 can coaxially align with the tensioning screw 41 of the pipe die 40 before tensioning the pipe die 40.

In one embodiment, referring to fig. 2, the tensioning device 200 includes a casing 210, a tensioning rod 220, a tensioning connection assembly 230 and a tail member 240, wherein the casing 210 has a tail end 202 and a head end 201 which are disposed opposite to each other in an axial direction (i.e., an X direction shown in the drawing), the head end 201 is close to the pipe die 40, the tail end 202 is far from the pipe die 40, the tensioning rod 220 is movably coaxially inserted into the casing 210, and the tensioning connection assembly 230 is connected to an end of the tensioning rod 220 inserted into the casing 210, the tensioning connection assembly 230 is used for engaging the tensioning screw 41, and the tensioning rod 220 is capable of rotating about a central axis of the casing 210 and moving in the tensioning X direction toward the pipe die 40 under the driving of the tail member 240 so that the tensioning connection assembly 230 can engage the tensioning screw 41 or can move in a direction away from the pipe die 40 so that the tensioning connection assembly 230 can engage the tensioning screw 41 to tension the pipe die 40.

In a specific embodiment, referring to fig. 2 and 3, the housing 210 includes a body 211 and a piston rod 212 coaxially disposed, the body 211 has a cavity 2111 penetrating opposite ends in the X direction, the piston rod 212 is movably inserted into the cavity 2111 and closes the tail end 202, and the piston rod 212 has a piston hole 2121 penetrating opposite ends thereof in the X direction. The body 211 comprises a jack cylinder 2112 and a nose component 2113 which are connected end to end, wherein the end of the jack cylinder 2112 away from the nose component 2113 is the nose end 202, the end of the nose component 2113 away from the jack is the nose end 201, and a piston rod 212 is movably inserted into the jack cylinder 2112 and seals the nose end 202. When the tensioning connection assembly 230 needs to engage the tensioning screw 41, the tensioning rod 220 and the tensioning connection assembly 230 can rotate together around the central axis of the machine body 211 and the piston rod 212 under the drive of the tail part 240 and move along the X direction towards the direction approaching to the pipe die 40; when the tension rod 220 stretches the pipe die 40, the tension connection assembly 230 engages the tension screw 41 and moves in the X direction away from the pipe die 40 with the tension rod 220 and the piston rod 212 relative to the body 211.

Preferably, referring to fig. 3, the tensioning device 200 further includes a pull rope displacement sensor 250, one end of the pull rope displacement sensor 250 is disposed on the housing 210, the other end is connected to the piston rod 212, and the pull rope displacement sensor 250 is used for detecting the displacement of the piston rod 212 relative to the housing 210, so that a user can know the tensioned displacement, and thus can more intuitively know whether the actual elongation of the tubular pile cage rib meets the requirement.

Further, referring to fig. 2 and 4, the tensioning device 200 further includes a tail nut 260, the tail nut 260 is fixedly connected to an end of the piston rod 212 remote from the head end 201, threads extending along the X direction are respectively provided on an outer circumferential surface of the tensioning rod 220 and an inner circumferential surface of the tail nut 260, and the tensioning rod 220 sequentially penetrates through the tail nut 260 and the piston rod 212 and is in threaded connection with the tail nut 260. Thus, the tension rod 220, while rotating about its central axis, is driven by the tail member 240, and is independently movable in the X-direction relative to the tail nut 260 and the piston rod 212 to approach the tension nut by the drive of the threaded connection.

Preferably, the tensioning device 200 further includes a mounting seat 270, the tail part 240 is disposed on the mounting seat 270, a guide shaft 280 extending along the X direction is disposed on the mounting seat 270, a linear bearing 213 is disposed on the casing 210, and the guide shaft 280 can move relative to the casing 210 under the guide of the linear bearing 213, so that the tension rod 220 assembly can move more stably when moving independently relative to the casing 210.

As described in the background, when the tensioning machine 10 fails, the tensioning connection assembly 230 and the tensioning screw 41 may be engaged and seized, in which case once the pipe die 40 and the tensioning connection assembly 230 are not easily removed, or the tensioning connection assembly 230 is not easily removed from the tensioning machine 10, there is no way to deal with the failure, resulting in a stop of the whole production line.

To solve this problem, as a further improvement, as shown in fig. 4 and 5, the tension connection assembly 230 includes a tension head 231, a sleeve 232, and an unlocking member 233, the tension head 231 being for engagement with the tension screw 41 of the pipe die 40, which is detachably connected to the tension rod 220 through the sleeve 232 and the unlocking member 233. Specifically, the tension rod 220, the sleeve 232 and the tension head 231 are coaxially arranged, the sleeve 232 is detachably and fixedly connected to one end of the tension rod 220, which is inserted into the casing 210 in the X direction, through threads, the unlocking member 233 is arranged in the sleeve 232 in a pluggable manner and can be taken out from the sleeve 232, and when the unlocking member 233 is arranged in the sleeve 232, the tension head 231 is inserted into the sleeve 232 and is abutted against the unlocking member 233, so that the tension head 231 and the sleeve 232 are mutually locked, and the tension connecting assembly 230 is in a locking state; when the unlocking member 233 is pulled out of the sleeve 232 by an external force, the tension head 231 can be separated from the sleeve 232 by an angle relative to the sleeve 232 and the tension rod 220 about its central axis, and the tension connection assembly 230 is in an unlocked state.

Referring to fig. 5, in a specific embodiment, a receiving cavity 2321 is formed in the sleeve 232, a jack 2322 with a diameter smaller than that of the receiving cavity 2321 and communicated with the receiving cavity 2321 is formed on one side of the sleeve 232 in the X direction, a plurality of grooves 2323 which are formed in the circumferential direction of the jack 2322 at intervals and communicated with the receiving cavity 2321 are formed in the inner circumferential surface of the jack 2322, a plurality of protruding blocks 2311 which are formed in the outer circumferential surface of the tensioning head 231 at intervals are correspondingly formed in the outer circumferential surface of the tensioning head 231, a plurality of unlocking pieces 233 are correspondingly formed in the outer circumferential surface of the tensioning head 231, a plurality of protruding blocks 2311 and a plurality of unlocking pieces 233 are adjacent to each other in the circumferential direction of the sleeve 232 and are alternately arranged, at least part of each protruding block 2311 and each unlocking piece 233 are arranged in the receiving cavity 2321, each protruding block 2311 abuts against the adjacent unlocking piece 233 and the side wall of the receiving cavity 2321, and all the unlocking pieces 233 can be taken out from the sleeve 232 through the grooves 2323.

More specifically, each unlocking member 233 includes a bolt 2331 and a spacer 2332, the spacer 2332 is aligned with a corresponding one of the grooves 2323, and the bolt 2331 is inserted through the wall of the sleeve 232 from the outer circumferential surface of the sleeve 232 and abuts against the tensioning head 231, so as to prevent the spacer 2332 from being separated from the accommodating chamber 2321 through the groove 2323. Preferably, the outer circumferential surface of the sleeve 232 is provided with a through hole 2324 communicating with the accommodating chamber 2321, and the through hole 2324 is used for inserting a hand or a tool of a worker so that the spacer 2332 can be pulled out of the accommodating chamber 2321. Preferably, the through-hole 2324 is in the shape of a kidney hole in the embodiment of the figures, so that there is sufficient space for movement to pull out the spacer 2332 after a tool or finger is inserted into the through-hole 2324.

Thus, through the above arrangement, when the tensioning machine 10 fails, the bolt 2331 can be pulled out first, so that the displacement of the spacer 2332 in the Y direction is not limited, then the spacer 2332 is pulled out by a finger or a tool into the through hole 2324, and the spacer 2332 is pulled out in the X direction, and finally the tensioning head 231 rotates by an angle relative to the sleeve 232, so that the bump 2311 is located in the corresponding groove 2323, and the accommodating cavity 2321 can be withdrawn through the groove 2323 to further separate the tensioning head 231 from the sleeve 232, so that the tensioning screw 41 and the tensioning machine 10 are separated from each other to facilitate the worker to handle the failure.

It is to be understood that the structure of the unlocking member 233 is not limited to the above structure including the bolt 2331 and the spacer 2332, for example, only the spacer 2332 may be provided without the bolt 2331, so long as the spacer 2332 is ensured not to separate from the accommodating cavity 2321 through the groove 2323 in the locked state, and only a person is required to pull out the spacer 2332 to separate from the accommodating cavity 2321.

As a further improvement, the end of the tensioning head 231 is provided with a screw hole 2312 for engaging the tensioning screw 41, and the outer circumferential surface of the tensioning head 231 is provided with a mud-removing groove 2313 communicated with the screw hole 2312, and the mud-removing groove 2313 is used for scraping soil on the tensioning screw 41 in the process of engaging the tensioning head 231 with the tensioning screw 41 and discharging the soil from the mud-removing groove 2313. Thus, no impurity residue is ensured on the screw thread of the screw hole 2312 of the tension head 231, and the situation that the tension screw 41 and the tension head 231 are blocked by soil and cannot be automatically meshed into the screw hole 2312 of the tension head 231 is avoided.

Therefore, the tensioning device 200 and the tensioning machine 10 comprising the tensioning device 200 provided by the application are designed into the structure convenient to detach by designing the tensioning connection assembly 230, so that once the tensioning machine 10 fails, the tensioning head 231 can be quickly detached from the sleeve 232 without an external tool, a piece to be tensioned, which is meshed with the tensioning head 231, can also be quickly detached from the tensioning machine 10, and after the failure is relieved, the tensioning head 231 can be quickly mounted on the sleeve 232 to enable the tensioning connection assembly 230 to be changed into a locking state again, thereby saving dismounting time, improving dismounting efficiency, quickly removing the failure when the tensioning machine 10 fails, and avoiding the phenomenon that the whole production line is stopped for a long time.

Finally, it should be noted that, in order to simplify the description, all possible combinations of the features of the above embodiments may be arbitrarily combined, however, as long as there is no contradiction between the combinations of the features, the description should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. A tension connection assembly, comprising:

2. The tension connection assembly according to claim 1, wherein a containing cavity is formed in the sleeve, a jack which is smaller than the containing cavity in diameter and is communicated with the containing cavity is formed in one side of the sleeve in the axial direction, a plurality of grooves which are arranged at intervals along the circumferential direction of the jack and are communicated with the containing cavity are formed in the inner circumferential surface of the jack, a plurality of convex blocks which are arranged at intervals are formed in the outer circumferential surface of the tension head, a plurality of unlocking pieces are correspondingly formed in the outer circumferential surface of the tension head, a plurality of convex blocks and a plurality of unlocking pieces are adjacently and alternately arranged along the circumferential direction of the sleeve, at least part of each convex block and each unlocking piece is arranged in the containing cavity, and each convex block abuts against the adjacent unlocking piece and the side wall of the containing cavity;

3. A tension connection assembly as recited in claim 2 wherein each of the unlocking members comprises a bolt and a spacer block, the spacer blocks being aligned with a corresponding one of the recesses, the bolts extending from the outer peripheral surface of the sleeve through the wall of the sleeve and abutting the tension head to prevent the spacer blocks from exiting the receiving cavity through the recesses.

4. A tensioning connection assembly according to claim 3, wherein the end of the tensioning head is provided with a screw hole for engaging a machine to be tensioned, and the outer peripheral surface of the tensioning head is provided with a mud removing groove communicated with the screw hole, the mud removing groove is used for scraping soil on the tensioning screw in the process of engagement of the tensioning head and the tensioning screw of the piece to be tensioned, and discharging the soil from the mud removing groove.

5. A tension connection assembly as recited in claim 3 wherein the sleeve has a through hole formed in an outer peripheral surface thereof in communication with the receiving cavity, the through hole being for insertion of a hand or tool to enable the spacer to be pulled out of the receiving cavity.

6. A tensioning device, comprising:

a tension connection assembly as recited in any one of claims 1-5, connected to an end of the tension rod inserted into the housing, the tension rod being rotatable about its central axis relative to the housing and being advanced in the axial direction to engage the tension connection assembly with the piece to be tensioned or being retractable relative to the housing in the axial direction to cause the tension connection assembly to tension the piece to be tensioned.

7. A tensioning device according to claim 6, wherein the housing comprises a body and a piston rod coaxially disposed, the body having a cavity extending through opposite ends of the body in an axial direction, the piston rod being movably inserted into the cavity and closing the tail end, the piston rod having piston bores extending through opposite ends of the piston rod in the axial direction;

8. A tensioning device according to claim 7, further comprising a tail nut fixedly connected to an end of the piston rod remote from the head end, the tension rod being threaded through the tail nut and the piston rod in sequence and in threaded connection with the tail nut, the tension rod being capable of being controllably rotated about its central axis while being independently moved in the axial direction relative to the tail nut under the drive of the threaded connection.

9. A tensioning device according to claim 7, further comprising a pull-cord displacement sensor, one end of the pull-cord displacement sensor being disposed on the housing and the other end being connected to the piston rod, the pull-cord displacement sensor being configured to detect the displacement of the piston rod relative to the housing.

10. A tensioning machine, comprising a frame, a driving unit and a tensioning device according to any one of claims 6-9, wherein the driving unit and the tensioning device are arranged on the frame, part of the driving unit is in transmission connection with the frame, the rest part of the driving unit is in transmission connection with the tensioning device, and the driving unit can drive the frame and the tensioning device to move along an X axis and/or a Y axis which extend horizontally and are mutually perpendicular together, and can also drive the tensioning device to move along a Z axis which extends vertically alone.