Tensioning equipment suitable for production of prestressed material of rail sleeper

Abstract

The invention relates to the technical field of material tensioning, in particular to tensioning equipment suitable for production of a prestressed material of a rail sleeper. Comprising a bottom frame, the bottom frame is slidably connected with a movable frame, and the movable frame is provided with a first hydraulic push rod; the connecting piece is rotationally connected to the telescopic end of the first hydraulic push rod, the connecting piece is provided with a shell, the shell is filled with a transmission medium, the shell is slidably connected with a sliding rod, and a first pipe and a second pipe are communicated between the shell arranged in a mirror image mode; the die set is arranged on the bottom frame and used for forming materials; and the limiting mechanism is arranged on the sliding rod and is used for applying prestress to the mold group. According to the device, the shells which are arranged in a mirror image mode are communicated through the first pipe and the second pipe, so that the force applied to the sliding rod by a transmission medium in the shells is uniform, uniform prestress is applied to the mold set through the limiting mechanism, and the preload applied to the sleeper is uniform.

Description

Technical Field

[0001] The invention relates to the technical field of material tensioning, and in particular to a tensioning device for producing prestressed materials suitable for rail sleepers. Background Art

[0002] Prestressed sleepers are a new type of sleeper structure that uses prestressed steel bars to enhance the bending and compressive properties of sleepers. Compared with traditional concrete sleepers, prestressed sleepers have higher bearing capacity, longer service life and better seismic resistance. Prestressed sleepers are widely used in railway projects, especially in the construction of high-speed railways and heavy-load railways. During the production process of prestressed sleepers, tensioning equipment is usually used to stretch the steel bars in the sleepers to give the steel bars an initial load (prestress treatment). The prestress can effectively offset the impact of external loads on concrete, thereby effectively improving the various properties of concrete sleepers.

[0003] When the existing prestressed sleepers are tensioned, the steel bars are only tensioned uniformly. However, since one sleeper mold can usually produce two sleepers at a time, and since the initial states of the steel bars in the mold are different, the steel bars are prone to uneven prestressing during the tensioning process (the same tensioning distance has different tensioning degrees of the steel bars), resulting in different degrees of prestressing on the steel bars, thereby affecting the normal use of the sleepers after production. Summary of the invention

[0004] In order to overcome the disadvantage of the existing tensioning device that the steel bars are unevenly prestressed, thereby reducing the production quality of sleepers, the present invention provides a tensioning device for the production of prestressed materials suitable for railway sleepers.

[0005] The technical solution is: a tensioning equipment for the production of prestressed materials suitable for rail sleepers, comprising: a base frame, the base frame is slidably connected to a movable frame, the movable frame is equipped with a first hydraulic push rod arranged in a mirror image; two connecting members are arranged in a mirror image, respectively rotatably connected to the telescopic ends of adjacent first hydraulic push rods, the connecting member is equipped with a shell, the shell is filled with a transmission medium, the shell is slidably connected to a sliding rod, the mirror-arranged shells are fixedly connected and connected with a first pipe and a second pipe, and the first pipe and the second pipe are both connected to an external hydraulic system; a guide member is fixedly connected to the base frame, the sliding rod is slidably connected to the guide member; a mounting frame is slidably connected to the guide member; two locking shells are arranged in a mirror image, both are rotatably connected to the mounting frame; a mold group is arranged on the base frame for molding the material; two limiting mechanisms are arranged in a mirror image, respectively arranged on adjacent sliding rods, and used to apply prestress to the mold group.

[0006] Further, the mold group includes: a mold shell, which is arranged on the side of the base frame away from the shell body, and the mold shell is slidably connected with a tension rod arranged in a mirror image; two steel bar groups are arranged at intervals and are both arranged in the mold shell; a plurality of tension plates are arranged at intervals and are respectively arranged on adjacent steel bar groups, and the tension rod is fixedly connected with the first circumferentially arranged protrusion on the side away from the tension plate, and the tension rod is threadedly connected with a locking nut, and the mold shell and the locking shell both limit the locking nut.

[0007] Furthermore, the limiting mechanism includes: a moving part, fixedly connected to the sliding rod; a limiting shell, rotatably and slidably connected to the moving part, the limiting shell is provided with the second protrusions arranged circumferentially, the second protrusions and the first protrusions limit each other, and a first elastic element is fixedly connected between the moving part and the limiting shell; a first trigger component is arranged on the limiting shell, and is used to make the moving part and the limiting shell rotate relative to each other; a locking component is arranged on the mounting frame, and is used to lock the mold group.

[0008] Furthermore, the first trigger component includes: a third protrusion, which is arranged on the limiting shell, and the movable member is provided with a first limiting groove, the first limiting groove limits the third protrusion, and the first limiting groove is an inclined groove, which is used to make the limiting shell and the movable member rotate relative to each other.

[0009] Furthermore, the locking assembly includes: a rotating frame, rotatably connected to the moving part, and the rotating frame is fixedly connected to the locking shell; a gear, fixedly connected to the locking shell; a rack, slidably connected to the mounting frame, and the rack is meshed with the gear; a second trigger assembly is arranged on the guide member, and is used to cause the rack and the mounting frame to slide relative to each other.

[0010] Furthermore, the second trigger assembly includes: a limit frame fixedly connected to the guide member, the limit frame is provided with a second limit groove, the rack is fixedly connected to the limit column, the second limit groove is used to limit the limit column, and the second limit groove is an inclined groove, which is used to make the rack and the mounting frame slide relative to each other.

[0011] Furthermore, it also includes: a reset mechanism, which is arranged on the guide member and is used to make the second protrusion lose the limit on the first protrusion. The reset mechanism includes: a second hydraulic push rod, which is installed on the guide member, and the telescopic end of the second hydraulic push rod is fixedly connected to a fixed rod; two deflection rods are arranged at intervals and are respectively fixedly connected to adjacent limit shells. The deflection rod is provided with a through groove, and the fixed rod is used to squeeze the through groove. The movable member is provided with a third limit groove, and the third limit groove is used to limit the third protrusion, and the third limit groove is connected to the first limit groove.

[0012] Furthermore, the projection of the third limiting groove on the vertical plane is vertical, so as to enable the limiting shell to rotate along the sliding rod.

[0013] Furthermore, it also includes: a knocking mechanism, which is arranged in a mirror image and is arranged on the mounting frame, and is used to apply a vibration force to the locking shell; the knocking mechanism includes: a guide frame, fixedly connected to the mounting frame; a limiting ring, fixedly connected to the locking shell, the limiting ring is provided with circumferentially arranged protrusions, the guide frame is slidably connected to a sliding member, and a second elastic element is fixedly connected between the guide frame and the sliding member; a knocking member, which is rotatably connected to the sliding member, the protrusion on the limiting ring squeezes the knocking member, and a third elastic element is fixedly connected between the sliding member and the knocking member.

[0014] Furthermore, the cross section of the protrusion on the limiting ring is in the shape of a "right triangle", which is used to extrude the striking member in different directions.

[0015] Compared with the prior art, the present invention has at least the following advantages: the present invention connects the mirror-arranged shells through the first tube and the second tube, so that the force applied by the transmission medium in the shell to the sliding rod is uniform, and the mold group is uniformly prestressed through the limiting mechanism, so that the preload applied to the sleeper is uniform, thereby improving the ability of the sleeper to resist external loads; the limiting shell is quickly rotated under the action of the torsion of the first elastic element, so that the second protrusion and the adjacent first protrusion are "engaged" to complete the limiting, avoiding the time-consuming and labor-intensive phenomenon caused by the use of conventional threaded connection methods, thereby reducing the production efficiency of the sleeper. ; The locking shell is driven to rotate by the gear, so that the locking nut is always in close contact with the mold shell, so as to ensure the locking of the tensioning rod at all times during the tensioning process, and prevent the tensioning rod from resetting under the action of the "elastic force" generated by the deformation of the steel bar group after the tensioning is completed, thereby affecting the tensioning quality. At the same time, it reduces the operating steps of the staff, reduces the work intensity of the staff, and shortens the time spent in the tensioning process, thereby improving the tensioning efficiency; the striking piece is used to strike the limit ring to generate vibration force, thereby releasing the stress accumulated inside the steel bar group, so that the prestress is evenly distributed in the steel bar group, improving the tensioning effect, and then improving the production quality of the sleeper. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the base frame and the parts thereon of the present invention;

[0018] Figure 3 It is a three-dimensional structural cross-sectional view of the mobile frame and the housing of the present invention;

[0019] Figure 4 This is a three-dimensional structural cross-sectional view of the rotating frame of the present invention driving the gear to rotate;

[0020] Figure 5 It is a three-dimensional structural cross-sectional view of the present invention when the moving part and the rotating frame rotate relative to each other;

[0021] Figure 6 It is a three-dimensional structural exploded diagram of the sliding rod and the parts thereon of the present invention;

[0022] Figure 7 It is a three-dimensional structural exploded view of the guide member and the parts thereon of the present invention;

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure when the locking shell of the present invention drives the limiting ring to rotate;

[0024] Fig. 9 For the present invention Figure 8 A magnified view of the three-dimensional structure at center A;

[0025] Fig.10 It is a three-dimensional structural exploded view of the guide frame and the parts thereon of the present invention.

[0026] Markings in the accompanying drawings: 101-mold shell, 102-tension rod, 103-steel bar group, 104-tension plate, 105-first protrusion, 106-locking nut, 1-base frame, 2-moving frame, 3-first hydraulic push rod, 4-connecting member, 5-shell, 6-sliding rod, 7-first tube, 8-second tube, 9-guide member, 10-mounting frame, 11-locking shell, 1201-moving member, 1202-limiting shell, 1203-second protrusion, 1204-first elastic element, 1205- The third protrusion, 1206-the first limiting groove, 1301-the limiting frame, 1302-the rotating frame, 1303-the second limiting groove, 1304-the gear, 1305-the rack, 1306-the limiting column, 1401-the second hydraulic push rod, 1402-the fixing rod, 1403-the deflection rod, 1404-the third limiting groove, 1501-the guide frame, 1502-the limiting ring, 1503-the sliding part, 1504-the second elastic element, 1505-the knocking part, 1506-the third elastic element. DETAILED DESCRIPTION

[0027] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] like Figure 1-Figure 4 As shown in the figure, an embodiment of the present invention is proposed, which is a tensioning device for the production of prestressed materials suitable for railway sleepers, so as to solve the problem that it is difficult for existing tensioning equipment to uniformly tension the steel bar group during the tensioning process, resulting in uneven prestressing of the steel bar group, which affects the subsequent normal use of the sleeper, including: a base frame 1, the base frame 1 is slidably connected to a moving frame 2, and the moving frame 2 is equipped with two first hydraulic push rods 3 arranged in a mirror image; a connecting member 4, which is two mirror-arranged ones, and is rotatably connected to the telescopic ends of adjacent first hydraulic push rods 3, and the connecting member 4 is equipped with a shell 5, the shell 5 is filled with a transmission medium, and the shell 5 is slidably connected to There is a sliding rod 6, which divides the shell 5 into two cavities. The two shells 5 are fixedly connected and connected with a first tube 7 and a second tube 8, and the first tube 7 and the second tube 8 are both connected to the external hydraulic system; a guide member 9 is fixedly connected to the base frame 1, and the sliding rod 6 is slidably connected to the guide member 9; a mounting frame 10 is slidably connected to the guide member 9; two locking shells 11 are arranged in a mirror image, and are both rotatably connected to the mounting frame 10; a mold group is arranged on the side of the base frame 1 away from the shell 5, and is used to shape the material; two limiting mechanisms are arranged in a mirror image, and are respectively arranged on adjacent sliding rods 6, and are used to apply prestress to the mold group.

[0029] In the above scheme, a slide rail is provided on the base frame 1, and an electric slider is provided on the mobile frame 2. The electric slider of the mobile frame 2 slides on the slide rail of the base frame 1. The transmission medium in the shell 5 is hydraulic oil. The sliding rod 6 divides the shell 5 into two left and right cavities. The first tube 7 connects the cavities on the left side of the two shells 5, and the second tube 8 connects the cavities on the right side of the two shells 5. The axis of the sliding rod 6 coincides with the axis of the adjacent locking shell 11. The locking shell 11 is in the shape of a "hexagonal sleeve". When the steel bar group is tensioned, the staff transfers the assembled mold group to the tensioning area, and then uses the electric slider to drive the mobile frame 2 to move right. The mobile frame 2 drives the first hydraulic push rod 3, the connecting piece 4, the shell 5 and the guide piece 9 to move right together. The shell 5 drives the sliding rod 6 and the locking shell 11 to move right together. The sliding rod 6 drives the mounting frame 10 to move right together, and the mounting frame 10 and the guide piece 9 remain relatively static. The locking shell 11 moves to the right and contacts the mold group. Then, the hydraulic system is used to inject external hydraulic oil into the cavity on the right side of the shell 5, and the hydraulic oil in the cavity on the left side of the shell 5 is extracted. The two sliding rods 6 begin to move to the left and apply uniform prestress to the mold group through the limiting mechanism, thereby improving the uniformity of the subsequent application of the sleeper preload, and then improving the ability of the sleeper to resist external loads. Since the cavities on the same side of the two shells 5 are connected, when the two sliding rods 6 are subjected to different forces on the tensioning mold group, the sliding rod 6 with greater resistance remains stationary, and the sliding rod 6 with less resistance slides relative to the adjacent shell 5 until the two sliding rods 6 are subjected to the same force. Then, the two sliding rods 6 move together (when the two sliding rods 6 are blocked differently, different displacements will occur, that is, the displacements of the two are different), thereby ensuring that the prestress applied to the mold group by the two sliding rods 6 is the same.

[0030] like Figure 1 and Figure 2 As shown, the mold group includes: a mold shell 101, which is arranged on the side of the base frame 1 away from the shell body 5, and the mold shell 101 is slidably connected with two tensioning rods 102 arranged in a mirror image; a steel bar group 103, which is two arranged at intervals in the front and back, and both are arranged in the mold shell 101; a tensioning plate 104, which is a plurality of tensioning plates arranged at intervals and respectively arranged in adjacent steel bar groups 103, and the tensioning rod 102 is used to tension the tensioning plate 104, and the tensioning plate 104 is fixedly connected adjacent to the steel bar group 103, and the left side of the tensioning rod 102 is fixedly connected with three first protrusions 105 arranged circumferentially, and the tensioning rod 102 is threadedly connected with a locking nut 106, and the mold shell 101 and the locking shell 11 both limit the locking nut 106, and most of the parts on the mold group are existing technologies, and only the first protrusion 105 is added to cooperate with the limiting mechanism.

[0031] like Figure 3-Figure 7As shown, the limiting mechanism includes: a moving member 1201, fixedly connected to the sliding rod 6; a limiting shell 1202, rotatably and slidably connected to the moving member 1201, the limiting shell 1202 is provided with three second protrusions 1203 arranged circumferentially, the second protrusions 1203 and the first protrusions 105 are mutually limited, and a first elastic element 1204 is fixedly connected between the moving member 1201 and the limiting shell 1202; a first trigger component, arranged on the limiting shell 1202, used to make the moving member 1201 The part 1201 and the limiting shell 1202 rotate relative to each other, and the first trigger component includes: a third protrusion 1205, which is arranged on the limiting shell 1202, and the movable part 1201 is provided with a first limiting groove 1206, the first limiting groove 1206 limits the third protrusion 1205, and the first limiting groove 1206 is an inclined groove, which is used to make the limiting shell 1202 and the movable part 1201 rotate relative to each other; a locking component is arranged on the mounting frame 10, and is used to lock the mold group.

[0032] In the above scheme, the axis of the moving member 1201 coincides with the axis of the limiting shell 1202, the first elastic element 1204 is a spring, which can be axially and radially deformed, and is used to apply torsion and elastic force to the adjacent limiting shell 1202, and the first limiting groove 1206 gradually tilts to the left from top to bottom (such as Figure 6 As shown in the figure as an example, during the movement of the sliding rod 6 to the right, the sliding rod 6 drives the moving member 1201 to move to the right together, and the moving member 1201 drives the limiting shell 1202 to move to the right together through the first elastic element 1204, and the limiting shell 1202 drives the second protrusion 1203 to move to the right together. After the second protrusion 1203 moves to the right until it contacts the first protrusion 105, as the moving member 1201 continues to move to the right, the first limiting groove 1206 begins to squeeze the third protrusion 1205, and then the third protrusion 1205 begins to drive the limiting shell 1202 to rotate clockwise under the squeezing action of the first limiting groove 1206 (as shown in the figure). Figure 6Taking the right viewing direction as an example), the limiting shell 1202 drives the second protrusion 1203 to rotate clockwise together. During the process, the limiting shell 1202 and the moving part 1201 continue to slide axially relative to each other and rotate circumferentially relative to each other (the first elastic element 1204 is deformed and generates elastic force and torque). The second protrusion 1203 and the adjacent first protrusion 105 are gradually staggered. When the two are completely staggered, the limiting shell 1202 begins to move rapidly to the right under the action of the elastic force of the first elastic element 1204, and after the second protrusion 1203 passes the first protrusion 105, the limiting shell 1202 quickly rotates (counterclockwise) under the action of the torque of the first elastic element 1204, thus completing the second protrusion 120 3 and the adjacent first protrusion 105 "bite" (at this time the third protrusion 1205 is again located at the upper end of the first limiting groove 1206, i.e. reset), so as to avoid the time-consuming and labor-intensive phenomenon caused by the use of conventional threaded connection, thereby reducing the production efficiency of the sleeper. After the second protrusion 1203 and the adjacent first protrusion 105 "bite", the sliding rod 6 is moved to the left through the hydraulic system, so that the limiting shell 1202 drives the tensioning rod 102 to move to the left through the "bite" between the second protrusion 1203 and the adjacent first protrusion 105, thereby applying prestress to the steel bar group 103 to achieve the purpose of tensioning. After the tensioning is completed, the reset mechanism is used to reset the parts.

[0033] like Figure 3-Figure 7 As shown, the locking assembly includes: a rotating frame 1302, which is rotatably connected to the moving member 1201, and the rotating frame 1302 is fixedly connected to the locking shell 11; a gear 1304, which is fixedly connected to the locking shell 11; a rack 1305, which is slidably connected to the mounting frame 10, and the rack 1305 is meshed with the gear 1304; a second trigger assembly, which is arranged on the guide member 9, and is used to make the rack 1305 and the mounting frame 10 slide relative to each other, and the second trigger assembly includes: a limiting frame 1301, which is fixedly connected to the guide member 9, and the limiting frame 1301 is provided with a second limiting groove 1303; the rack 1305 is fixedly connected to the limiting column 1306, and the second limiting groove 1303 is used to limit the limiting column 1306, and the second limiting groove 1303 is an inclined groove, which is used to make the rack 1305 and the mounting frame 10 slide relative to each other.

[0034] In the above solution, the second limiting groove 1303 gradually tilts backward from left to right (with Figure 7Taking the second limiting groove 1303 on the front side as an example, the axis of the rotating frame 1302 coincides with the axis of the adjacent sliding rod 6. During the process of the sliding rod 6 moving to the left (tensioning process), the sliding rod 6 drives the mounting frame 10 to move to the left together. The mounting frame 10 and the guide member 9 slide relatively. The mounting frame 10 drives the locking shell 11 and the rack 1305 to move to the left together. The locking shell 11 drives the gear 1304 to move to the left together. During the process, the locking shell 11 and the limiting shell 1202 remain relatively still. The rack 1305 drives the limiting column 1306 to move to the left together. The limiting column 1306 begins to slide in the second limiting groove 1303. Under the limiting action of the second limiting groove 1303, the two limiting columns 1306 respectively drive the adjacent racks 1305. Moving backward, the rack 1305 drives the gear 1304 to start rotating, and the gear 1304 drives the locking shell 11 to rotate together, and the locking shell 11 drives the locking nut 106 to rotate together, and the locking nut 106 starts to move rightward along the adjacent tensioning rod 102, and the locking nut 106 and the locking shell 11 slide axially relative to each other. During the process, the locking nut 106 is always in close contact with the mold shell 101, so as to ensure the locking of the tensioning rod 102 at all times during the tensioning process, and prevent the tensioning rod 102 from resetting under the action of the "elastic force" generated by the deformation of the steel bar group 103 after the tensioning is completed, thereby affecting the tensioning quality, while reducing the operating steps of the staff, reducing the work intensity of the staff, and shortening the time used in the tensioning process, thereby improving the tensioning efficiency.

[0035] like Figure 5-Figure 8 As shown, it also includes: a reset mechanism, which is arranged on the guide member 9 and is used to make the second protrusion 1203 lose the limit on the first protrusion 105. The reset mechanism includes: a second hydraulic push rod 1401, which is installed on the guide member 9. The telescopic end of the second hydraulic push rod 1401 is fixedly connected to a fixed rod 1402; two deflection rods 1403 are arranged at intervals and are respectively fixedly connected to adjacent limit shells 1202. The deflection rod 1403 is provided with a through groove, and the axis of the through groove is parallel to the axis of the deflection rod 1403. The fixed rod 1402 is used to squeeze the through groove. The movable member 1201 is provided with a third limit groove 1404, and the third limit groove 1404 is used to limit the third protrusion 1205. The third limit groove 1404 is connected to the first limit groove 1206. The projection of the third limit groove 1404 on the vertical plane is vertical, which is used to make the limit shell 1202 rotate along the sliding rod 6.

[0036] In the above scheme, after the tensioning work is completed, the telescopic end of the second hydraulic push rod 1401 is used to drive the fixed rod 1402 to move forward (such as Figure 8 As shown in the figure, the fixed rod 1402 squeezes the deflection rod 1403, and the deflection rod 1403 starts to rotate clockwise (as shown in the figure). Figure 8Taking the left view as an example), the deflection rod 1403 drives the limiting shell 1202 to rotate clockwise, the third protrusion 1205 slides downward in the third limiting groove 1404, and the limiting shell 1202 drives the second protrusion 1203 to rotate clockwise, and the second protrusion 1203 and the first protrusion 105 gradually lose the "bite". When the two completely lose the "bite", the electric slider drives the moving frame 2 and the parts thereon to move to the left, so that the second protrusion 1203 is reset (the locking shell 11 is disengaged from the locking nut 106), thereby reducing the staff's The operation steps improve the tensioning efficiency. Then the staff transfers the mold group (that has completed the tensioning work), and then uses the hydraulic system to move the sliding rod 6 and its parts to the right. During the process, the sliding rod 6 drives the locking shell 11 and the rack 1305 (limiting column 1306) to move to the right together through the mounting frame 10, and the locking shell 11 drives the gear 1304 to move to the right together, and the limiting column 1306 slides in the second limiting groove 1303 (the two racks 1305 move in opposite directions, and the gear 1304 reverses). The machine can be stopped after all parts are reset.

[0037] like Figure 8-Figure 10 As shown, it also includes: two knocking mechanisms, which are arranged in mirror image and are both arranged on the mounting frame 10, and are used to apply vibration force to the locking shell 11; the knocking mechanism includes: a guide frame 1501, which is fixedly connected to the mounting frame 10; a limiting ring 1502, which is fixedly connected to the locking shell 11, and the limiting ring 1502 is provided with a plurality of circumferentially arranged protrusions, the guide frame 1501 is slidably connected to a sliding member 1503, and a second elastic element 1504 is fixedly connected between the guide frame 1501 and the sliding member 1503; a knocking member 1505, which is rotatably connected to the sliding member 1503, and the cross-section of the protrusion on the limiting ring 1502 is a "right triangle" shape, which is used to squeeze the knocking member 1505 in different directions, the protrusion on the limiting ring 1502 squeezes the knocking member 1505, and a third elastic element 1506 is fixedly connected between the sliding member 1503 and the knocking member 1505.

[0038] In the above scheme, the second elastic element 1504 is a tension spring, which is used to apply tension to the sliding member 1503, and the third elastic element 1506 is a torsion spring, which is used to reset the knocking member 1505. The "right-angle side" of the protrusion on the limit ring 1502 coincides with the adjacent radial line on the adjacent locking shell 11. During the rotation of the locking shell 11 (tensioning process), the locking shell 11 drives the limit ring 1502 to rotate together. When the inclined surface of the protrusion on the limit ring 1502 contacts the knocking member 1505, the knocking member 1505 is squeezed and starts to move upward. The knocking member 1505 drives the sliding member 1503 to move upward together, and the sliding member 1503 slides relative to the guide frame 1501. The second elastic element 1504 is stretched, and as the limiting ring 1502 continues to rotate, the second elastic element 1504 is continuously stretched. When the limiting ring 1502 rotates until the protrusion on it passes the knocking piece 1505, the sliding piece 1503 drives the knocking piece 1505 to move downward rapidly under the action of the pulling force of the second elastic element 1504, and finally the knocking piece 1505 knocks the limiting ring 1502. The limiting ring 1502 transmits the vibration force to the steel bar group 103 through the locking shell 11, the locking nut 106, the tensioning rod 102 and the tensioning plate 104, thereby releasing the stress accumulated inside the steel bar group 103, so that the prestress of the steel bar group 103 is redistributed evenly, thereby improving the tensioning effect and thus improving the production quality of the sleeper.

[0039] During the reverse rotation of the gear 1304, the gear 1304 drives the limit ring 1502 to reverse together through the locking shell 11. When the "straight surface" of the protrusion on the limit ring 1502 contacts the knocking piece 1505, the knocking piece 1505 is squeezed and begins to deflect forward (such as Fig. 9 As shown), the knocking member 1505 and the sliding member 1503 rotate relative to each other, the third elastic element 1506 is deformed, and after the protrusion on the limit ring 1502 passes through the knocking member 1505, the knocking member 1505 is reset under the action of the torque of the third elastic element 1506, and this cycle is repeated until all parts are completely reset.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tensioning device for the production of prestressed materials suitable for rail sleepers, characterized in that: Included are: A base frame (1), the base frame (1) being slidably connected to a moving frame (2), the moving frame (2) being equipped with a first hydraulic push rod (3) arranged in a mirror image; The connecting members (4) are two mirror-arranged ones, and are respectively rotatably connected to the telescopic ends of the adjacent first hydraulic push rods (3). The connecting members (4) are provided with a housing (5), and the housing (5) is filled with a transmission medium. The housing (5) is slidably connected to a sliding rod (6). The mirror-arranged housings (5) are fixedly connected and communicated with a first pipe (7) and a second pipe (8), and the first pipe (7) and the second pipe (8) are both connected to an external hydraulic system. A guide member (9) is fixedly connected to the base frame (1), and the sliding rod (6) is slidably connected to the guide member (9); A mounting frame (10) is slidably connected to the guide member (9), and the sliding rod (6) is fixedly connected to the mounting frame (10); Two locking shells (11) are arranged in mirror image and are both rotatably connected to the mounting frame (10); A mold assembly, arranged on the base frame (1), for molding the material; The limiting mechanisms are two mirror-arranged ones, respectively provided on adjacent sliding rods (6), and are used to apply prestress to the mold set.

2. The tensioning equipment for producing prestressed materials suitable for rail sleepers according to claim 1 is characterized in that: The mold set includes: A mold shell (101) is arranged on a side of the base frame (1) away from the shell body (5), and the mold shell (101) is slidably connected to a tension rod (102) arranged in a mirror image; Two steel bar groups (103) are arranged at intervals and are both disposed in the mold shell (101); The tensioning plates (104) are a plurality of tensioning plates (104) arranged at intervals and respectively disposed on adjacent steel bar groups (103); the tensioning rod (102) is fixedly connected to the side away from the tensioning plate (104) with the first protrusion (105) arranged circumferentially; the tensioning rod (102) is threadedly connected with a locking nut (106); the mold shell (101) and the locking shell (11) both limit the locking nut (106).

3. The tensioning equipment for producing prestressed materials suitable for rail sleepers according to claim 2 is characterized in that: The limiting mechanism comprises: A moving member (1201) fixedly connected to the sliding rod (6); a limiting shell (1202) rotatably and slidably connected to the moving member (1201); the limiting shell (1202) is provided with the second protrusions (1203) arranged circumferentially, the second protrusions (1203) and the first protrusions (105) are mutually limited, and a first elastic element (1204) is fixedly connected between the moving member (1201) and the limiting shell (1202); A first trigger component, disposed on the limiting shell (1202), and used to cause the moving part (1201) and the limiting shell (1202) to rotate relative to each other; A locking assembly is arranged on the mounting frame (10) and is used to lock the mold set.

4. The tensioning equipment for producing prestressed materials for rail sleepers according to claim 3 is characterized in that: The first trigger component includes: The third protrusion (1205) is arranged on the limiting shell (1202), and the movable member (1201) is provided with a first limiting groove (1206), and the first limiting groove (1206) limits the third protrusion (1205). The first limiting groove (1206) is an inclined groove, which is used to enable the limiting shell (1202) and the movable member (1201) to rotate relative to each other.

5. The tensioning equipment for producing prestressed materials for rail sleepers according to claim 3 is characterized in that: The locking assembly comprises: A rotating frame (1302) is rotatably connected to the moving member (1201), and the rotating frame (1302) is fixedly connected to the locking shell (11); A gear (1304) fixedly connected to the locking housing (11); A rack (1305) is slidably connected to the mounting frame (10), and the rack (1305) is meshed with the gear (1304); A second trigger assembly is arranged on the guide member (9) and is used to cause the rack (1305) and the mounting frame (10) to slide relative to each other.

6. The tensioning equipment for producing prestressed materials for rail sleepers according to claim 5, characterized in that: The second trigger component includes: A limiting frame (1301) is fixedly connected to the guide member (9), the limiting frame (1301) is provided with a second limiting groove (1303), the rack (1305) is fixedly connected to the limiting column (1306), the second limiting groove (1303) is used to limit the limiting column (1306), and the second limiting groove (1303) is an inclined groove, which is used to enable the rack (1305) and the mounting frame (10) to slide relative to each other.

7. The tensioning equipment for producing prestressed materials for rail sleepers according to claim 4, characterized in that: Also included are: A reset mechanism is arranged on the guide member (9) and is used to make the second protrusion (1203) lose the position restriction on the first protrusion (105), and the reset mechanism comprises: A second hydraulic push rod (1401) is mounted on the guide member (9), and a telescopic end of the second hydraulic push rod (1401) is fixedly connected to a fixed rod (1402); The deflection rods (1403) are two arranged at intervals and are respectively fixedly connected to the adjacent limiting shells (1202). The deflection rods (1403) are provided with a through groove. The fixed rod (1402) is used to squeeze the through groove. The movable member (1201) is provided with a third limiting groove (1404). The third limiting groove (1404) is used to limit the third protrusion (1205). The third limiting groove (1404) is connected to the first limiting groove (1206).

8. The tensioning equipment for producing prestressed materials for rail sleepers according to claim 7, characterized in that: The projection of the third limiting groove (1404) on the vertical plane is vertical, and is used to enable the limiting shell (1202) to rotate along the sliding rod (6).

9. The tensioning equipment for producing prestressed materials for rail sleepers according to claim 1, characterized in that: Also included are: The knocking mechanism is arranged in a mirror image and is disposed on the mounting frame (10) and is used to apply a vibration force to the locking shell (11). The knocking mechanism comprises: A guide frame (1501) fixedly connected to the mounting frame (10); A limiting ring (1502) is fixedly connected to the locking shell (11), the limiting ring (1502) is provided with circumferentially arranged protrusions, the guide frame (1501) is slidably connected to a sliding member (1503), a second elastic element (1504) is fixedly connected between the guide frame (1501) and the sliding member (1503); a knocking member (1505) is rotatably connected to the sliding member (1503), the protrusions on the limiting ring (1502) squeeze the knocking member (1505), and a third elastic element (1506) is fixedly connected between the sliding member (1503) and the knocking member (1505).

10. The tensioning equipment for producing prestressed materials for rail sleepers according to claim 9, characterized in that: The cross section of the protrusion on the limiting ring (1502) is in the shape of a "right triangle", which is used to squeeze the striking member (1505) in different directions.

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