CN218875851U

CN218875851U - Tensioning device of sleeper prestress tensioning machine

Info

Publication number: CN218875851U
Application number: CN202223153037.7U
Authority: CN
Inventors: 叶剑波; 贾粮棉; 温卫民; 曾琦; 刘凯辉; 吴鑫; 闫艳兵; 万钢新; 赵晓江; 伏海丽
Original assignee: HEBEI YITIE ELECTROMECHANICAL TECHNOLOGY CO LTD; China Railway First Engineering Group Co Ltd
Current assignee: HEBEI YITIE ELECTROMECHANICAL TECHNOLOGY CO LTD; China Railway First Engineering Group Co Ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-04-18
Anticipated expiration: 2032-11-23

Abstract

The utility model belongs to the tensioning equipment especially indicates a tensioning equipment of sleeper prestressing force tensioning machine. The tensioning device comprises a main support and an auxiliary support which are arranged at intervals and can accommodate sleeper moulds, adjusting mechanisms arranged on the main support and the auxiliary support drive the sleeper moulds to vertically and horizontally move, a tensioning jack is in sliding assembly with the main support, the sliding direction of the tensioning jack is in the same axial direction with the sleeper moulds, a second tensioning rod of the tensioning jack is matched with a first tensioning rod of the sleeper moulds through a connecting mechanism, a tensioning force sensor and a tensioning jack displacement sensor are arranged on the main support, and a central control device receives force values and displacement value signals transmitted by the tensioning force sensor and the tensioning jack displacement sensor and controls synchronous tensioning, load holding and locking of the tensioning device. The utility model discloses effectively solved the loaded down with trivial details and difficult technological problem such as realization automation of adjustment that prior art exists, had advantages such as structural configuration is compact, the operation is stable, easily realize automated control.

Description

Tensioning device of sleeper prestress tensioning machine

Technical Field

The utility model belongs to the tensioning equipment especially indicates a tensioning equipment of sleeper prestressing force tensioning machine.

Background

At present, the laying range of railway concrete sleepers of various countries in the world is gradually expanded, and prestressed integral sleepers are developed in most countries. China adopts concrete sleepers on high-speed railways, passenger special lines and existing main trunks as well as all the concrete sleepers. Its main advantages are high longitudinal and transverse resistances, high stability, long service life, low cost and less maintenance.

The prestressed concrete sleeper is the main component of railway track structure, and its production process can be divided into two types of long-line pedestal method and flow machine set method. At present, the Western Europe countries such as French, italy, germany, english, etc. generally adopt a long-line pedestal process. After the Susan improved Hungarian concrete sleeper flow machine set method process is introduced from 1956, the first prestressed concrete sleeper production line in China is built in a Toyotai bridge factory in 1958, more than 40 fixed production enterprises exist so far, and the production lines all adopt the flow machine set method.

The concrete sleeper also gets great progress in production level and production practice along with the continuous development of railways and development technologies in China. Not only the annual output is greatly improved, but also the automation and mechanization degree of the production process reach the international advanced level.

With the continuous acceleration of sleeper remodeling and generation, sleepers are changed from I type which is used for years and is not changed to II type, then to new II type, IIIa type and IIIb type, and basically updated once in 3 years, and the maintenance of newly built railways and existing lines also needs different sleepers to be produced simultaneously; because there are factors such as difference, sleeper production required precision constantly improves and labour constantly rises on the specification and the production technology of different model sleepers, the product of the multiple model all need be taken into account in current sleeper production line and the newly-built production line, and the semi-automatization sleeper production line of traditional extensive single type has been unable to adapt to the development of sleeper and the demand in existing market.

The sleeper prestress construction equipment serving as key equipment on a production line is just the main target of the requirement. The production line circulation which can adapt to the prestressed construction of various types of sleepers and a long line method is compatible with the production line circulation; meanwhile, the requirements of high automation, high precision of prestress construction and the like are also met, and the method is the key for adapting to the development of sleepers and market demands.

The sleeper prestress construction is divided into prestress tension and prestress release Zhang Liangge links, a traditional prestress tension mechanism is only a single tension station placed on a production line and cannot be linked with the whole production line, and therefore the production line cannot be automatically operated; meanwhile, due to the fact that the appearance of a sleeper mold is different due to production of multi-model sleepers, traditional tensioning equipment can only be used for keeping the mold still, manually aligning the mold and manually connecting a tensioning device, only tensioning operation of prestressed tendons in the tensioning process is completed, all other links are manual operation, tensioning precision is low, and data management and information management cannot be completed. The operation mode is continuously improved along with the continuous improvement of the current automation level, the sleeper model and the technological requirements are more perfect, the sleeper production cannot be adapted to at present, the prestress construction accuracy which can meet the production technological requirements is accurate, and the automatic tensioning mechanism which is adapted to multi-model moulds and automatic operation of a production line is adopted to carry out the operation of the link. The key of the prestress construction quality depends on the safety and accuracy of the tensioning mechanism. The tensioning process and the supporting facilities as the key process and the supporting equipment are not only one of the technical difficulties in the design and production process, but also the important research and development direction in the field.

Patent documents retrieved by the applicant include:

patent document 201520935115.X discloses a tensioning rod locking device of a sleeper prestressed tendon tensioning machine, which comprises an open strip-shaped box-shaped sleeper mold consisting of a plurality of plates, wherein an anchor cavity is reserved at the front end of an inner cavity of the sleeper mold, a prestressed tendon clamp capable of moving back and forth is arranged at the rear end of the inner cavity of the sleeper mold, the prestressed tendon clamp is also provided with an anchor cavity, each anchor cavity is communicated with the inner cavity of the sleeper mold, an anchor capable of sliding back and forth along the anchor is arranged in each anchor cavity, the length of the anchor is larger than the opening width of the anchor cavity, a plurality of blocking holes for hooping prestressed tendons with heads are arranged on the anchor, a sliding screw penetrating through the rear end of the sleeper mold is connected on the prestressed tendon clamp, a tensioning walking trolley capable of moving back and forth and back and forth and up and down is arranged outside the sleeper mold corresponding to the sliding screw, a center penetrating jack, a pressure sensor and a second anchor ring are arranged on the sliding screw, and the top surface of the tensioning trolley is connected with a tensioning trolley, and the tensioning trolley is connected with a pressure sensor and a pressure control unit. The tensioning rod has the problems that the sliding screw and the piercing jack are fixedly assembled, and although tensioning operation can be completed, the alignment of the tensioning rod needs to be adjusted in advance and is complex; secondly, the automatic and rapid operation is not easy to realize.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tensioning equipment of sleeper prestressing force tensioning machine adopts the utility model discloses can effectively realize the accurate stretch-draw in step between sleeper mould stretch-draw pole and the stretch-draw equipment, not only can satisfy the stretch-draw construction requirement to sleeper mould prestressing tendons, be convenient for realize automatic continuity of operation moreover.

The whole technical concept of the utility model is that:

a tensioning device of a sleeper prestress tensioning machine comprises a main support and an auxiliary support which are arranged at intervals and can accommodate sleeper molds, adjusting mechanisms arranged on the main support and the auxiliary support drive the sleeper molds to vertically and horizontally move, a tensioning jack is assembled with the main support in a sliding mode, the sliding direction of the tensioning jack is the same as the axial direction of the sleeper molds, a second tensioning rod of the tensioning jack is matched with a first tensioning rod of the sleeper molds through a connecting mechanism, a tensioning force sensor and a tensioning jack displacement sensor are arranged on the main support, and a central control device receives force values and displacement value signals transmitted by the tensioning force sensor and the tensioning jack displacement sensor and controls synchronous tensioning, load holding and locking of the tensioning jack.

The utility model discloses a concrete technical concept still has:

the adjusting mechanism mainly has the main function of realizing accurate alignment of the sleeper mould and the tensioning equipment, and the preferred technical implementation means is that the adjusting mechanism comprises a horizontal adjusting mechanism and a longitudinal adjusting mechanism, the longitudinal adjusting mechanism comprises lifting supports which are arranged on a main support and an auxiliary support and are driven by lifting oil cylinders, and the main support and the auxiliary support are provided with lifting oil cylinder displacement sensors; the horizontal adjusting mechanism comprises push arms which are arranged at two ends of the lifting support and are driven by the centering oil cylinders to move in opposite directions or in opposite directions, and the lifting support is provided with a centering oil cylinder displacement sensor.

The lifting oil cylinder displacement sensor and the centering oil cylinder displacement sensor are mainly used for conveniently receiving displacement signals of the oil cylinders, enabling the central control device to control the starting and stopping of the oil cylinders in real time, further ensuring the stroke synchronization of the oil cylinders, meeting the requirement that the displacement of a sleeper die meets the set quantity, and connecting signals output by the displacement sensors with the central control device. The displacement setting amount can be conveniently realized by setting the stroke of the oil cylinder according to the requirement.

In order to adjust the height of the box body on the main support conveniently and then adjust the alignment of the outer tension rod of the tensioning jack and the inner tension rod of the sleeper mold conveniently, the preferable technical implementation means is that the adjusting supports are arranged above the main support in parallel at intervals, and the adjusting supports are connected with the main support through adjusting screws.

In order to realize the connection between the first tension rod and the second tension rod and effectively complete the subsequent tensioning, loading and releasing operation, the preferable technical realization means is that the connecting mechanism comprises a box body which is assembled with the main bracket or the adjusting bracket in a sliding way, the sliding direction of the box body is coaxial with the sleeper mould, the rotating motor is fixed at the front end of the box body, the tensioning jack is fixed at the rear end of the box body, and the box body is internally provided with a locking mechanism which is matched with the adjacent ends of the first tension rod and the second tension rod.

In order to realize the locking after being connected between first stretch-draw pole and the second stretch-draw pole conveniently, make simultaneously not exert an influence between each spare part satisfying under stable in structure's the prerequisite, the preferred technological means of realizing is, locking mechanism is including being fixed in the horizontal balladeur train on box right side, vertical balladeur train is located horizontal balladeur train inside and rather than the horizontal spout slip assembly of seting up, second stretch-draw pole is inner to be passed through the box lateral wall, horizontal balladeur train rear end is located vertical balladeur train, the connector is longitudinal movement under the power supply drive of assembly on vertical balladeur train, the draw-in groove with the adjacent end adaptation of second stretch-draw pole and first stretch-draw pole is seted up respectively at the connector both ends.

The main effect of the power supply of assembly on the vertical balladeur train is the vertical linear motion of drive connector, and then accomplishes and take off with being connected and the pine of stretch-draw bar, and wherein the power supply can select multiple linear drive mechanism, include but not limit to linear electric motor, pneumatic cylinder, lead screw feed mechanism, parallelogram mechanism etc. and all do not break away from the technical essence of the utility model. The preferable technical implementation means is that a power source assembled on the vertical sliding frame selects a vertical oil cylinder assembled at the top of the vertical sliding frame, and a connector is fixed at an action execution end at the lower part of the vertical oil cylinder.

The more preferable technical implementation means is that a connector is fixed at the lower end of a piston rod of the vertical oil cylinder.

In order to facilitate the clamping of the clamping groove of the connector and the tension rod, the preferable technical implementation means is that the adjacent end of the second tension rod and the first tension rod is expanded and matched with the clamping groove.

In order to facilitate the tensioning operation and the retention of the prestress, a preferred technical realization is that the nut sleeve on the rotary motor is adapted to the nut on the first tension rod.

In order to facilitate the box body to realize axial feeding and further meet the operations of alignment, locking, tensioning and tension releasing of the first tension rod and the second tension rod, the preferable technical implementation means is that the box body is driven by a horizontal oil cylinder to be in sliding fit on a linear guide rail along the tensioning direction.

In the description of the present invention, the terms "above", "front", "right", "both ends", "top", "lower end", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of simplifying the description of the present invention, and do not indicate or imply that the device or element 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 the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The technical progress of the utility model lies in:

1. the tensioning jack and the second tensioning rod are used as power sources for tensioning, and the tensioning jack and the second tensioning rod are favorable for tensioning and releasing the prestressed tendons of the sleeper mould in the axial direction; and secondly, on the premise of ensuring that the prestress construction condition is met, the accurate alignment with the first tension rod of the sleeper mould is convenient to realize through the action of the main support, the auxiliary support and the adjusting mechanism.

2. The structural design of the tension force sensor and the tension displacement sensor can effectively transmit tension data to the central control device, so that the automatic production is convenient to realize, and the motion synchronization and the action accuracy are effectively realized. And secondly, the applied prestress is effectively monitored in real time, and the phenomena of over-tension and under-tension are avoided.

3. The horizontal sliding frame and the vertical sliding frame which are matched with the box body are used as main bearing frames of the device, so that the device can synchronously act with the box body, is easy to realize stable structure and is convenient for the box body to slide; and secondly, the movement of the connector and the matching with the tension rod are convenient to realize.

4. The vertical oil cylinder is adopted to drive the connector, so that the operation is quick and the accuracy of completing the action is high on the premise of meeting the specific requirements of applying, holding load, locking and the like on prestress in construction.

5. The clamping groove structure matched with the tension rod on the connector effectively realizes accurate and quick positioning, and provides structural guarantee for orderly tensioning construction.

Drawings

Fig. 1 is a schematic top view of the present invention.

Fig. 2 isbase:Sub>A view frombase:Sub>A-base:Sub>A of fig. 1.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a right side view of fig. 2.

Fig. 5 is a perspective view of the present invention.

Fig. 6 is a schematic view of the structure of the connector.

Fig. 7 is an axial side perspective view of the connector.

Fig. 8 is another angular isometric view of the connector.

The reference numbers in the drawings are as follows:

1. a main support; 2. a sub-mount; 3. adjusting the screw rod; 4. adjusting the bracket; 5. a box body; 6. lifting the support; 7. lifting the oil cylinder; 8. a straightening oil cylinder; 9. a push arm; 10. a rotary motor; 11. a horizontal oil cylinder; 12. a push arm linear guide rail; 13. a sleeper mold; 14. a first pull rod; 15. a connector; 16. a horizontal carriage; 17. tensioning a jack; 18. a tension sensor; 19. a second tension rod; 20. a tension jack displacement sensor; 21. a vertical carriage; 22. and a vertical oil cylinder.

Detailed Description

The present invention is further described with reference to the following examples, which should not be construed as limiting the scope of the present invention, but the scope of the present invention is defined by the following claims, and any equivalent technical means made according to the description should not be construed as departing from the scope of the present invention.

The overall concept of the embodiment is as shown in the figure, the tensioning device of the sleeper prestress tensioning machine comprises a main support 1 and an auxiliary support 2 which are arranged at intervals and can accommodate a sleeper mold 13, adjusting mechanisms arranged on the main support 1 and the auxiliary support 2 drive the sleeper mold 13 to vertically and horizontally move, a tensioning jack 17 is slidably assembled with the main support 1, the sliding direction of the tensioning jack 17 is coaxial with that of the sleeper mold 13, a second tensioning rod 19 of the tensioning jack 17 is matched with a first tensioning rod 14 of the sleeper mold 13 through a connecting mechanism, a tensioning force sensor 18 and a jack displacement sensor 20 are arranged on the main support 1, and a central control device receives tensioning force values and displacement value signals transmitted by the tensioning force sensor 18 and the tensioning jack displacement sensor 20 and controls the synchronization, the load holding and the locking of the tensioning jack 17.

The adjusting mechanism comprises a horizontal adjusting mechanism and a longitudinal adjusting mechanism, the longitudinal adjusting mechanism comprises a lifting support 6 which is arranged on the main support 1 and the auxiliary support 2 and is driven by a lifting oil cylinder 7, and the main support 1 and the auxiliary support 2 are provided with lifting oil cylinder displacement sensors; the horizontal adjusting mechanism comprises push arms 9 which are arranged at two ends of the lifting support 6 and are driven by a centering oil cylinder 8 to move in opposite directions or back to back, and a centering oil cylinder displacement sensor is arranged on the lifting support 6.

Adjusting supports 4 are arranged above the main support 1 at intervals in parallel, and the adjusting supports 4 are connected with the main support 1 through adjusting screws 3.

The connecting mechanism comprises a box body 5 which is assembled with the main support 1 or the adjusting support 4 in a sliding mode, the sliding direction of the box body 5 is the same as the axial direction of the sleeper mold 13, the rotating motor 10 is fixed at the front end of the box body 5, the tensioning jack 17 is fixed at the rear end of the box body 5, and a locking mechanism matched with the adjacent ends of the first tensioning rod 14 and the second tensioning rod 19 is arranged in the box body 5.

The locking mechanism comprises a horizontal sliding frame 16 fixed on the right side of the box body 5, a vertical sliding frame 21 is arranged inside the horizontal sliding frame 16 and is assembled with a horizontal sliding groove formed in the horizontal sliding frame in a sliding mode, the inner end of a second stretching rod 19 is located in the vertical sliding frame 21 through the side wall of the box body 5 and the rear end of the horizontal sliding frame 16, the connector 15 longitudinally moves under the driving of a power source assembled on the vertical sliding frame 21, and clamping grooves matched with the adjacent ends of the second stretching rod 19 and the first stretching rod 14 are formed in two ends of the connector 15 respectively.

The power source assembled on the vertical sliding frame 21 selects a vertical oil cylinder 22 assembled at the top of the vertical sliding frame 21, and the action execution end at the lower part of the vertical oil cylinder is fixed with a connector 15.

The lower end of the piston rod of the vertical oil cylinder 22 is fixed with a connector 15.

The adjacent end of the second tension rod 19 and the first tension rod 14 are expanded and matched with the clamping groove.

The nut sleeve on the rotary motor 10 is adapted to the nut on the first tension rod 14.

The box body 5 is driven by a horizontal oil cylinder 11 to be in sliding fit on a linear guide rail 12 along the tensioning direction.

The working principle of the embodiment is as follows:

when tensioning is needed, firstly, the adjusting mechanism is controlled, after the first tensioning rod 14 of the sleeper mould 13 and the second tensioning rod 19 of the tensioning jack 17 are coaxially positioned, the horizontal oil cylinder 11 pushes the box body 5 to be attached to and positioned with the sleeper mould 13; secondly, the nut assembled on the rotating motor 10 is rotated anticlockwise to be sleeved on the nut on the first pull rod 14; thirdly, the vertical oil cylinder 22 pushes the connector 15 to descend, and the neck parts of the back sides of the adjacent expansion ends of the first tension rod 14 and the second tension rod 19 are inserted in place to complete the connection locking of the tension rods; fourthly, the tensioning jack 17 synchronously tensions the first tension rod 14 of the sleeper mould 13 to a set force value and holds load respectively; fifthly, the rotating motor 10 rotates and anchors the nut on the first tension rod 14 clockwise at a high speed.

When tension releasing is needed, firstly, the tension jack 17 unloads oil cavity load through an oil way electromagnetic valve; secondly, the vertical oil cylinder 22 pushes the connector 15 to rise to complete the separation of the tension rod in place; thirdly, the box body 5 is pushed to open by a horizontal oil cylinder 11; fourthly, the tensioning jack 17 is used for feeding oil and returning the oil through an oil way electromagnetic valve; the rotation motor 10 rotates the nut on the first tension bar 14 counterclockwise at a high speed to loosen the nut.

Claims

1. The tensioning device of the sleeper prestress tensioning machine is characterized by comprising a main support (1) and an auxiliary support (2) which are arranged at intervals and can accommodate sleeper molds (13), adjusting mechanisms arranged on the main support (1) and the auxiliary support (2) drive the sleeper molds (13) to vertically and horizontally move, a tensioning jack (17) is assembled with the main support (1) in a sliding mode, the sliding direction of the tensioning jack is coaxial with that of the sleeper molds (13), a second tensioning rod (19) of the tensioning jack (17) is matched with a first tensioning rod (14) of the sleeper molds (13) through a connecting mechanism, a tensioning force sensor (18) and a tensioning jack displacement sensor (20) are arranged on the main support (1), and a central control device receives tensioning force values and displacement value signals transmitted by the tensioning force sensor (18) and the tensioning jack displacement sensor (20) and controls the synchronization, the load holding and the locking of the tensioning jack (17).

2. A tensioning device of a sleeper prestress tensioning machine according to claim 1, characterized in that the adjusting mechanism comprises a horizontal adjusting mechanism and a longitudinal adjusting mechanism, the longitudinal adjusting mechanism comprises a lifting bracket (6) which is arranged on the main bracket (1) and the auxiliary bracket (2) and is driven by a lifting cylinder (7), and the main bracket (1) and the auxiliary bracket (2) are provided with a lifting cylinder displacement sensor; the horizontal adjusting mechanism comprises push arms (9) which are arranged at two ends of the lifting support (6) and are driven by the centering oil cylinders (8) to move in opposite directions or in opposite directions, and the lifting support (6) is provided with a centering oil cylinder displacement sensor.

3. A tensioning device of a sleeper prestress tensioning machine according to claim 1, characterized in that adjusting brackets (4) are arranged above the main bracket (1) at intervals in parallel, and the adjusting brackets (4) are connected with the main bracket (1) through adjusting screws (3).

4. A tensioning device of a sleeper prestress tensioning machine according to claim 1 or 3, characterized in that the connecting mechanism comprises a box body (5) which is slidably assembled with the main bracket (1) or the adjusting bracket (4) and has the same sliding direction as the sleeper mold (13), the rotating motor (10) is fixed at the front end of the box body (5), the tensioning jack (17) is fixed at the rear end of the box body (5), and a locking mechanism which is matched with the adjacent ends of the first tensioning rod (14) and the second tensioning rod (19) is arranged in the box body (5).

5. A tensioning device of a sleeper prestress tensioning machine according to claim 4, characterized in that the locking mechanism comprises a horizontal sliding frame (16) fixed on the right side of the box body (5), the vertical sliding frame (21) is arranged inside the horizontal sliding frame (16) and is in sliding assembly with a horizontal sliding groove formed in the horizontal sliding frame, the inner end of the second tensioning rod (19) passes through the side wall of the box body (5), the rear end of the horizontal sliding frame (16) is located in the vertical sliding frame (21), the connector (15) is driven by a power source assembled on the vertical sliding frame (21) to move longitudinally, and clamping grooves matched with the adjacent ends of the second tensioning rod (19) and the first tensioning rod (14) are respectively formed in two ends of the connector (15).

6. A tensioning device for a prestressed sleeper tensioning machine according to claim 5, characterized in that the power source mounted on the vertical carriage (21) is a vertical cylinder (22) mounted on the top of the vertical carriage (21), and the actuating end of the lower part thereof is fixed with the connector (15).

7. A tensioning device for a sleeper prestressing tensioner according to claim 6, characterized in that the lower end of the piston rod of the vertical cylinder (22) is fixed with a connector (15).

8. A tensioning device for a sleeper prestressing tensioner according to claim 5, characterized in that the second tensioning rod (19) bulges out of the adjacent end of the first tensioning rod (14) and is adapted to the slot.

9. A tensioning device for a sleeper prestressing tensioner according to claim 4, characterized in that the nut socket on the rotary motor (10) is adapted to the nut on the first tensioning rod (14).

10. A tensioning device for a sleeper prestressing tensioner according to claim 4, characterized in that the housing (5) is slidably fitted in the tensioning direction on the linear guide (12) by means of a horizontal cylinder (11).