Nut locking device and nut pre-tightening apparatus

Abstract

The application relates to a nut locking device and a nut pre-tightening device. The nut pre-tightening device comprises a jacking device and a nut locking device, the jacking device comprises a mounting base and a lifting frame which is connected to the mounting base in a liftable manner, and the nut locking device comprises a base, a sleeve assembly and a support frame which is connected to the lifting frame, the support frame is provided with two first connecting blocks which are arranged at intervals, the base is provided with a second connecting block, and the two sides of the second connecting block are connected to the corresponding first connecting blocks through first elastic elements, so that the sleeve assembly can drive a tensioning screw rod to move horizontally, the jacking device can also lift the tensioning screw rod to a theoretical center position, and thus when the sleeve assembly directly locks the tensioning nut, the tensioning screw rod can be straightened before tensioning, so that the tensioning screw rod can be conveniently centered with a tensioning machine in a subsequent tensioning process, and the risk that the threads of the tensioning sleeve of the tensioning machine and the tensioning screw rod are locked and the risk that the tensioning screw rod is broken during tensioning can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building pipe pile production, in particular to a nut locking device and a nut pre-tightening equipment. BACKGROUND

[0002] Prestressed concrete pipe piles are widely used in the fields of house building structure and bridge structure due to their high single pile bearing capacity and convenient construction, etc. The production process of the prestressed concrete pipe piles is as follows: a pipe pile mold is used for production, concrete is first poured into the bottom mold of the pipe pile mold, then the cover mold is covered, the cover mold and the bottom mold are fixed by bolts, and then a series of processes are performed, and finally the mold is removed to complete the production of the pipe pile. In order to enable the prepared pipe pile to bear higher load in the use process, the process link of prestressed tensioning must be added when the concrete pipe pile is produced.

[0003] However, the prestressed tensioning process is a link with relatively high risk. If there is a certain angular deviation between the tensioning screw rod and the tensioning jack shaft axis, and the tensioning screw rod of the pipe pile mold is directly tensioned without straightening, the tensioning sleeve of the tensioning machine and the tensioning screw rod thread may be locked with each other, thereby causing a fault. It is time-consuming and laborious to handle the above fault, which seriously affects the production rhythm. And when the angular deviation is large, forcibly tensioning may also cause the steel bars of the cage reinforcement in the pipe pile to be broken, and the broken reinforcement may fly out of the opening of the pipe mold end plate and cause injury. SUMMARY

[0004] Therefore, it is necessary to provide a nut locking device and a nut pre-tightening equipment including the same in order to solve the problem that the tensioning screw rod is directly tensioned without straightening in the prior art, which leads to easy occurrence of faults or easy occurrence of safety accidents. The position of the tensioning screw rod can be corrected before the pipe pile is tensioned, and the tensioning nut is directly tightened, so as to achieve the purpose of straightening the tensioning screw rod.

[0005] According to one aspect of the present application, a nut locking device is provided, which comprises:

[0006] A support frame is provided with two first connecting blocks which are spaced apart along a first horizontal direction;

[0007] A base is slidably arranged on the support frame, and the base is capable of sliding relative to the support frame along the first horizontal direction. The lower side of the base is provided with a second connecting block, and the opposite sides of the second connecting block are respectively connected to a corresponding first connecting block by a first elastic element;

[0008] A sleeve assembly is arranged on the upper side of the base, and a central axis of the sleeve assembly extends in a second horizontal direction perpendicular to the first horizontal direction; the sleeve assembly is used to controllably drive a nut of the part to be locked to rotate around a central axis of the sleeve assembly, so as to lock the nut.

[0009] In one of the embodiments, the upper side of the base is further provided with a sleeve seat, a support seat and a first driving member; the sleeve assembly is coaxially and rotatably connected to the sleeve seat; the first driving member is drivingly connected to the sleeve assembly through a transmission assembly, so as to drive the sleeve assembly to rotate around a central axis of the sleeve assembly; at least a part of the support seat is coaxially arranged in the sleeve assembly, and is used to support a screw rod of the part to be locked.

[0010] In one of the embodiments, the sleeve assembly has a cavity penetrating through axially opposite sides of the sleeve assembly; the cavity is used to accommodate and limit the nut; a first opening is formed in an outer circumferential surface of the sleeve assembly, and penetrates through axially opposite sides of the sleeve assembly and communicates with the cavity; a second opening is formed in an outer circumferential surface of the sleeve seat, and penetrates through axially opposite sides of the sleeve seat and opens upward; the first opening can be in alignment or misalignment with the second opening with rotation of the sleeve assembly.

[0011] In one of the embodiments, the sleeve assembly comprises a sleeve and a first gear; the sleeve and the first gear are connected to each other and coaxially arranged in the second horizontal direction; the transmission assembly comprises two second gears; the two second gears are arranged on two sides of the first gear in the first horizontal direction, and are respectively engaged with the first gear.

[0012] In one of the embodiments, the transmission assembly further comprises a first transmission wheel, a second transmission wheel, a third transmission wheel and a fourth transmission wheel; the first transmission wheel is coaxially connected to an output end of the first driving member; the second transmission wheel and the third transmission wheel are coaxially connected to one of the second gears; the fourth transmission wheel is coaxially connected to the other second gear; the first transmission wheel is drivingly connected to the second transmission wheel through a first transmission belt; the third transmission wheel is drivingly connected to the fourth transmission wheel through a second transmission belt.

[0013] According to another aspect of the present application, a nut locking device and a jacking device are provided; the jacking device comprises a mounting seat, a lifting frame and a second driving member; the second driving member is arranged on the mounting seat; the lifting frame is liftingly connected to the mounting seat and drivingly connected to the second driving member; the support frame of the nut locking device is connected to the lifting frame; the second driving member is used to drive the lifting frame and the nut locking device to lift relative to the mounting seat along a vertical direction.

[0014] In one of the embodiments, the jacking device further comprises a third driving member arranged on the mounting base and a blocking rod drivingly connected to the third driving member, the blocking rod is arranged in the second horizontal direction and parallel to the support frame;

[0015] The blocking rod is used to block the forward movement of the member to be locked in the second horizontal direction, and the third driving member is used to drive the blocking rod to move relative to the support frame to avoid the nut locking device, so that the nut locking device can move close to the member to be locked in the second horizontal direction, and the sleeve assembly of the nut locking device can be sleeved on the nut of the member to be locked.

[0016] In one of the embodiments, the nut pre-tightening device further comprises a follower device, the follower device comprises a first sliding rail and a sliding seat, the sliding seat is slidably arranged on the first sliding rail and connected to the first sliding rail through a second elastic member, the jacking device is arranged on the sliding seat, and the second elastic member is configured to provide an elastic force that enables the sliding seat, the jacking device and the nut locking device to move together in the second horizontal direction and close to the member to be locked when the member to be locked touches the blocking rod and the blocking rod moves relative to the support frame to avoid the nut locking device.

[0017] In one of the embodiments, the follower device further comprises a fourth driving member drivingly connected to the sliding seat, the fourth driving member is used to drive the sliding seat, the jacking device and the nut locking device to move together in the second horizontal direction.

[0018] In one of the embodiments, the jacking device is rotatably arranged on the sliding seat, and a fifth driving member is further arranged on the mounting base of the jacking device, the fifth driving member is drivingly connected to the sliding seat and used to drive the jacking device and the nut locking device to rotate around an axis extending in the vertical direction.

[0019] The nut locking device and the nut pre-tightening device have at least the following technical effects:

[0020] On the one hand, by slidably arranging the base on the support frame, arranging two spaced mounting bases on the support frame, and arranging the connecting block on the lower side of the base, the opposite sides of the connecting block are connected to the corresponding mounting bases through a first elastic member, so that the sleeve assembly arranged on the upper side of the base can move together with the base in the first horizontal direction. In this way, the sleeve assembly can start to move together with the tensioning screw in the first horizontal direction when it contacts the tensioning screw of the pipe pile mold, so as to correct the position of the tensioning screw in the first horizontal direction when the jack of the tensioning machine is out of alignment.

[0021] In another aspect, by arranging the lifting frame in the jacking device, connecting the support frame of the nut locking device to the lifting frame, and enabling the lifting frame and the nut locking device to be lifted together in the vertical direction, the sleeve assembly can correct the position of the tensioning screw in the first horizontal direction and also lift the tensioning screw of the pipe pile mold to the theoretical center position before the pipe pile mold is tensioned by the tensioning machine, so that the tensioning screw can be straightened before tensioning when the sleeve assembly directly locks the tensioning nut, thereby facilitating the centering of the tensioning screw of the pipe pile mold and the tensioning machine in the subsequent tensioning process, and reducing the risk of the tensioning sleeve of the tensioning machine and the threads of the tensioning screw being locked and the risk of the tensioning process causing the tendon to break. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A structural schematic diagram of a pipe mold according to an embodiment of the present application.

[0023] Figure 2 An axial view of a nut pre-tightening device according to an embodiment of the present application.

[0024] Figure 3 An axial view of a nut locking device according to an embodiment of the present application. Figure 1 .

[0025] Figure 4 An axial view of a nut locking device according to an embodiment of the present application. Figure 2 .

[0026] Figure 5 An axial view of a jacking device according to an embodiment of the present application. Figure 1 .

[0027] Figure 6 An axial view of a jacking device according to an embodiment of the present application. Figure 2 .

[0028] Figure 7 A top view of a follow-up device according to an embodiment of the present application.

[0029] Figure 8 An axial view of a follow-up device according to an embodiment of the present application.

[0030] Figure 9 A structural schematic diagram of the mutual connection between a jacking device and a follow-up device according to an embodiment of the present application.

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 10, nut pre-tightening device; 100, nut locking device; 110, support frame; 111, second sliding rail; 112, first connecting block; 120, base; 121, sliding block; 122, second connecting block; 130, sleeve assembly; 130a, cavity; 130b, first opening; 131, sleeve; 132, first gear; 140, sleeve seat; 140a, second opening; 150, support seat; 160, transmission assembly; 161, second gear; 162, first transmission wheel; 163, second transmission wheel; 164, third transmission wheel; 165, fourth transmission wheel; 166, first transmission belt; 167, second transmission belt; 170, first driving member; 180, first elastic element; 200, jacking device; 210, mounting seat; 211, guide column; 220, lifting frame; 230, guide wheel; 240, second driving member; 250, third driving member; 260, blocking rod; 270, fifth driving member; 280, fourth gear; 300, follower device; 310, first sliding rail; 320, sliding seat; 330, leveling plate; 340, second elastic element; 350, fourth driving member; 360, third gear; 370, roller; 400, photoelectric switch; 50, pipe mold; 51, bottom mold; 52, cover mold; 53, tensioning baffle; 54, tensioning nut; 55, tensioning screw. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and claimed in this disclosure and it is therefore intended that the present application not be limited to the embodiments presented herein.

[0034] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or piece referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, if there are these terms "first", "second", these terms are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, if there are the terms "a plurality of", the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0036] In the present application, unless otherwise explicitly specified and limited, if there are terms "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two pieces or the interaction relationship between two pieces, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "below" the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0038] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for the purpose of description, and do not represent the only implementation.

[0039] The present application provides a nut locking device and a nut pre-tightening device, wherein the nut pre-tightening device comprises the nut locking device, and the nut pre-tightening device is used to tighten the nut on the to-be-locked piece to meet the needs of the next production process.

[0040] The following takes the pipe pile mold (hereinafter referred to as pipe mold) as an example, and takes the nut and screw rod of the to-be-locked member as the tensioning nut and tensioning screw rod of the pipe mold as an example to describe the structure of the nut pre-tightening device and the nut locking device in the present application. It can be understood that in other embodiments, the nut pre-tightening device of the present application is not limited to only tightening the nut of the pipe pile mold, but can also tighten the nut of any to-be-locked member, and the nut locking device of the present application can also be used alone to lock the nut of the to-be-locked member, which is not limited here.

[0041] Referring to Figure 1 , Figure 1 A schematic view of the pipe mold 50 is shown, and the pipe mold 50 shown in the figure includes a bottom mold 51, a cover mold 52, a tensioning baffle 53, a tensioning nut 54, and a tensioning screw rod 55. The bottom mold 51 and the cover mold 52 are fixedly connected to each other by mold bolts, the tensioning baffle 53 is located at the end of the pipe mold 50, the tensioning baffle 53 has the tensioning screw rod 55 thereon, and the tensioning nut 54 is sleeved on the tensioning screw rod 55 and is threadedly connected with the tensioning screw rod 55. When assembling the pipe mold 50, first, after placing the cage and pouring the concrete in the bottom mold 51, the cover mold 52 is closed, and then the bottom mold 51 and the cover mold 52 are assembled with each other by the mold bolts. After assembly is completed, the pipe mold 50 is sent to a tensioning station, and the pipe mold 50 is tensioned by a tensioning machine. During tensioning, the bottom mold 51, the cover mold 52, and the tensioning baffle 53 are stationary, and the tensioning screw rod 55 is pulled by the tensioning machine to move along the tensioning direction indicated by the arrow in the figure. Before tensioning, the tensioning nut 54 can be rotated by the tensioning and tightening device provided by the present application to abut against the tensioning baffle 53 relative to the tensioning screw rod 55, so as to fasten the tensioning baffle 53 on the pipe mold 50 and lock the tensioning force on the pipe mold 50. Figure 2

[0042] Referring to Figure 2 , Figure 2 ​A schematic diagram of the nut pre-tightening device 10 in an embodiment of the present application is shown. The nut pre-tightening device 10 provided by the present application comprises a nut locking device 100, a jacking device 200 and a follower device 300, wherein the jacking device 200 is connected to the follower device 300, and the nut locking device 100 is connected to the jacking device 200. The nut locking device 100 is used to connect and tighten the tensioning nut of the pipe mold; the jacking device 200 is used to jacking the nut locking device 100 upwards along the vertical direction (i.e. the Z direction shown in the figure, hereinafter referred to as the Z direction) so that the position of the nut locking device 100 in the Z direction corresponds to the pipe mold; the follower device 300 is used to drive the jacking device 200 and the nut tightening device to move together along the second horizontal direction (i.e. the Y direction shown in the figure, hereinafter referred to as the Y direction) so that the nut locking device 100 can approach the pipe mold along the Y direction and be connected to the tensioning nut of the pipe mold, thereby being able to tighten the tensioning nut, or the nut locking device 100 can move away from the pipe mold along the Y direction so that the nut locking device 100 can be separated from the tensioning nut after completing the tightening of the tensioning nut and avoid the flat car carrying the pipe mold, thereby enabling the flat car to carry the pipe mold to the next station.

[0043] Referring to Figure 3 and Figure 4 In an embodiment, the nut locking device 100 comprises a support frame 110, a base 120, a sleeve assembly 130, a sleeve seat 140, a support seat 150, a transmission assembly 160 and a first driving member 170, wherein the support frame 110 is connected to the jacking device 200, the base 120 is slidably arranged on the support frame 110, and the sleeve assembly 130, the sleeve seat 140, the support seat 150, the transmission assembly 160 and the first driving member 170 are all located on the upper side of the base 120. The sleeve seat 140, the support seat 150 and the first driving member 170 are fixedly arranged on the base 120, the sleeve assembly 130 is coaxially and rotatably connected to the sleeve seat 140 and is used to be sleeved on the tensioning nut; the first driving member 170 is drivingly connected to the sleeve assembly 130 through the transmission assembly 160 to drive the sleeve assembly 130 to rotate around the central axis of the tensioning nut, thereby being able to tighten the tensioning nut; the support seat 150 is coaxially arranged with the sleeve assembly 130 and is partially arranged in the sleeve assembly 130, and is used to support the tensioning screw; the support frame 110 is provided with a second sliding rail 111, and the lower side of the base 120 is provided with a sliding block 121 movably connected to the second sliding rail 111, so that the base 120 can carry the sleeve assembly 130, the sleeve seat 140, the support seat 150, the transmission assembly 160 and the first driving member 170 to move together along the first horizontal direction (i.e. the X direction shown in the figure, hereinafter referred to as the X direction) to adjust the position of the sleeve assembly 130 in the X direction, so that the central axis of the sleeve assembly 130 can correspond to the position of the central axis of the tensioning nut in the X direction.

[0044] Specifically, as shown in Figure 3 The sleeve seat 140 and the sleeve assembly 130 are both annular structures, and the inner circumferential surface of the sleeve seat 140 is provided with a sliding groove (not labeled in the figure) around the central axis of the sleeve seat 140, and the outer periphery of the sleeve assembly 130 is slidably connected in the sliding groove, so that the sleeve assembly 130 can rotate around its own central axis relative to the sleeve seat 140. The sleeve assembly 130 has a cavity 130a penetrating through the axially opposite sides thereof, which is used to accommodate and limit the tensioning nut. In a preferred embodiment, the outer circumferential surface of the sleeve assembly 130 is provided with a first opening 130b penetrating through the axially opposite sides thereof and communicating with the cavity 130a, and the outer circumferential surface of the sleeve seat 140 is provided with a second opening 140a penetrating through the axially opposite sides thereof and opening upward. When the sleeve assembly 130 rotates around its own center relative to the sleeve seat 140, the first opening 130b can be aligned or misaligned with the second opening 140a. When the first opening 130b is aligned with the second opening 140a, the jacking device 200 can jacking the nut locking device 100 to move upward in the Z direction, so that the tensioning screw rod of the pipe mold can directly pass through the second opening 140a and the first opening 130b into the cavity 130a of the sleeve assembly 130, without having to adjust the position of the nut locking device 100 in the Y direction and then adjust the position of the nut locking device 100 in the Z direction to enable the sleeve assembly 130 to be sleeved on the tensioning nut, thereby saving the connection time of the nut locking device 100 and the tensioning nut and improving the production efficiency.

[0045] More specifically, the sleeve assembly 130 includes a sleeve 131 and a first gear 132, which are fixedly connected to each other in the Y direction and coaxially arranged, and both the sleeve 131 and the first gear 132 are circular arc ring structures with an arc greater than 180°, so that the sleeve 131 and the first gear 132 jointly form the first opening 130b. The transmission assembly 160 includes two second gears 161, each of which has a diameter smaller than that of the first gear 132, and the two second gears 161 are arranged on opposite sides of the first gear 132 in the X direction and are respectively engaged with the first gear 132, and each second gear 161 is respectively drivingly connected to a first driving member 170, which can be a servo motor, a brake motor, a general motor or a variable frequency motor, etc. When the first driving member 170 is started, the two second gears 161 can be rotated at the same time, thereby driving the first gear 132 and the sleeve 131 to rotate, and thereby tightening the tensioning nut.

[0046] Thus, by arranging two second gears 161 on both sides of the first gear 132, if one of the second gears 161 disengages from the first gear 132, the other second gear 161 can timely engage, so as to realize stable transmission.

[0047] Preferably, the first gear 132 is provided with a detection plate (not shown in the figure), and the base 120 is provided with a proximity switch (not shown in the figure). With the rotation of the first gear 132, when the detection plate moves to the position of the proximity switch, the first driving member 170 can stop starting, so as to enable the sleeve assembly 130 to accurately stop at the position where the first opening 130b and the second opening 140a are opposite to each other, i.e., to ensure that the first opening 130b of the sleeve assembly 130 is in an upward position.

[0048] Further, the transmission assembly 160 further comprises a first transmission wheel 162, a second transmission wheel 163, a third transmission wheel 164 and a fourth transmission wheel 165. The first transmission wheel 162 is coaxially connected to the output end of the first driving member 170, the second transmission wheel 163 and the third transmission wheel 164 are coaxially connected to one of the second gears 161, and the fourth transmission wheel 165 is coaxially connected to the other second gear 161. The first transmission wheel 162 and the second transmission wheel 163 are transmissionally connected through a first transmission belt 166, and the third transmission wheel 164 is transmissionally connected to the fourth transmission wheel 165 through a second transmission belt 167. Thus, only one first driving member 170 can drive two second gears 161 to rotate synchronously, and by transmissionally connecting the first transmission wheel 162 and the second transmission wheel 163 through the first transmission belt 166 and transmissionally connecting the third transmission wheel 164 and the fourth transmission wheel 165 through the second transmission belt 167, if the sleeve assembly 130 is stuck during the tightening of the tension nut, the first transmission belt 166 or the second transmission belt 167 can slip, so as to play an overload protection role for the first driving member 170. It can be understood that the first transmission belt 166 can be a belt, and the second transmission belt 167 can be a synchronous belt, or the first transmission belt 166 is a synchronous belt and the second transmission belt 167 is a belt, or both are synchronous belts or both are belts, which are not limited herein.

[0049] It can be understood that the first transmission wheel 162 and the second transmission wheel 163 can be transmissionally connected through other transmission modes, such as gear transmission, chain transmission, belt transmission, etc., which are not limited herein, and the transmission modes of the third transmission wheel 164 and the fourth transmission wheel 165 are also not limited.

[0050] It can also be understood that the sleeve seat 140 can not be arranged on the base 120, the sleeve assembly 130 can be directly rotatably arranged on the base 120, or the support seat 150 is completely accommodated in the cavity 130a of the sleeve assembly 130, or the base 120 can not be arranged with the support seat 150, or the transmission assembly 160 can not be arranged, the sleeve assembly 130 is directly and transmissionally connected with the first driving member 170, etc., all of which are not particularly limited.

[0051] In order to enable the sleeve assembly 130 to be sleeved on the tensioning nut, the position of the pipe mold in the X direction can be self-adaptively corrected, and the position of the pipe mold in the X direction can correspond to the position of the center axis of the jack of the tensioning machine in the X direction. Referring to Figure 4 The support frame 110 is provided with two first connecting blocks 112 arranged along the X direction and spaced apart, and the lower side of the base 120 is provided with a second connecting block 122, which is located between the two first connecting blocks 112, and the opposite sides of the second connecting block 122 are respectively connected to the corresponding first connecting block 112 through a first elastic element 180. The first elastic element 180 can be a spring or other parts that can be deformed and recovered, which is configured to provide elastic force for making the positions of the sleeve assembly 130 and the tensioning nut in the X direction correspond to each other when the sleeve assembly 130 is in contact with the tensioning nut and the sleeve assembly 130 is decentered with the tensioning nut when the nut locking device 100 moves upward along the Z direction, so as to self-adaptively correct the position of the pipe mold in the X direction.

[0052] Referring to Figure 5 and Figure 6In one embodiment, the jacking device 200 comprises a mounting base 210, a lifting frame 220 and a second driving member 240, the mounting base 210 is connected to the follower 300, the second driving member 240 is arranged on the mounting base 210, the lifting frame 220 is connected to the mounting base 210 in a lifting manner and is drivingly connected to the second driving member 240, for example, the second driving member 240 can be a pneumatic cylinder, the mounting base 210 is provided with a guide column 211 extending along the Z direction, and the lifting frame 220 is connected to the mounting base 210 in a lifting manner through a guide wheel 230, and the support frame 110 of the nut locking device 100 is connected to the lifting frame 220, so that when the second driving member 240 is started, the second driving member 240 can drive the lifting frame 220 and the nut locking device 100 as a whole to lift in the Z direction, so as to adjust the position of the sleeve assembly 130 in the Z direction, on the basis that the nut locking device 100 itself can adaptively adjust the position of the sleeve assembly 130 in the X direction, so that the nut pre-tightening device provided by the present application can directly lock the tensioning nut, and then achieve the purpose of straightening the tensioning screw rod before tensioning, so as to facilitate the smooth centering of the tensioning screw rod of the pipe pile mold and the tensioning machine in the subsequent tensioning process, thereby reducing the risk of the tensioning sleeve 131 of the tensioning machine and the threads of the tensioning screw rod being locked and the risk of the tendon being broken during tensioning.

[0053] Further, the jacking device 200 further comprises a third driving member 250 and a blocking rod 260, the third driving member 250 is arranged on the mounting base 210, and the blocking rod 260 is drivingly connected to the third driving member 250. Preferably, the third driving member 250 is arranged on the mounting base 210 in an inclined manner relative to the Z direction, so as to save the occupied space of the jacking device 200 as a whole, the blocking rod 260 is rotatably arranged on the mounting base 210 and is arranged in a spaced manner with the support frame 110 in the Y direction, and the blocking rod 260 is further arranged in parallel with the support frame 110.

[0054] In this way, when the flat car carrying the pipe mold moves forward along the Y direction, the tensioning blocking plate of the pipe mold can touch the blocking rod 260, so that the blocking rod 260 can block the pipe mold carried on the flat car from continuing to move forward along the Y direction when the blocking rod 260 is parallel to the support frame 110, thereby enabling the pipe mold to stop at a predetermined position. The third driving member 250 can drive the blocking rod 260 to rotate relative to the support frame 110 about an axis extending along the Y direction to avoid the nut locking device 100 (for example, to a position close to perpendicular to the support frame 110), so that the nut locking device 100 can move close to the pipe mold along the Y direction, and so that the sleeve assembly 130 of the nut locking device 100 can be sleeved on the tensioning nut of the pipe mold.

[0055] It can be understood that the movement of the blocking rod 260 relative to the support rod is not limited to a rotating movement, but can also be a translational movement relative to the support rod, as long as the blocking rod 260 can avoid the nut locking device 100 after moving relative to the support rod, so that the nut locking device 100 can move close to the pipe mold along the Y direction, and so that the sleeve assembly 130 can be sleeved on the tensioning nut of the pipe mold.

[0056] Referring to Figure 7 and Figure 8 , the follower device 300 includes a first sliding rail 310 and a sliding seat 320, the sliding seat 320 is slidably arranged on the first sliding rail 310, in Figure 7 and Figure 8 , the first sliding rail 310 is mounted on a leveling plate 330, so that the entire device can be installed horizontally on the ground, and the first sliding rail 310 extends along the Y direction, the sliding seat 320 is slidably arranged on the first sliding rail 310 through one or more rollers 370, the jacking device 200 is mounted on the sliding seat 320, so that the sliding seat 320 can carry the jacking device 200 and the nut locking device 100 to move along the Y direction together. And the sliding seat 320 is also connected to the first sliding rail 310 through a second elastic element 340, the second elastic element 340 is the same as the first elastic element 180, which can be a part that can be deformed recoverably such as a spring, and the second elastic element 340 is configured to provide an elastic force that can move the sliding seat 320, the jacking device 200 and the nut locking device 100 together along the Y direction and close to the pipe mold when the pipe mold touches the blocking rod 260 and the blocking rod 260 moves relative to the support frame 110 to avoid the nut locking device 100. Because the second elastic element 340 is provided, when the tensioning baffle of the pipe mold touches the blocking rod 260, the jacking device 200 will not move away from the pipe mold due to the touching force, but will always be close to the pipe mold and accurately stop at the predetermined position together with the flat car carrying the pipe mold, avoiding the flat car carrying the pipe mold to stop at an uncertain position.

[0057] Further, the follower device 300 further includes a fourth driving member 350 drivingly connected to the sliding seat 320, the fourth driving member 350 can also be a driving source such as an air cylinder, for driving the sliding seat 320, the jacking device 200 and the nut locking device 100 to move along the Y direction together, so that the nut locking device 100 can be driven by the fourth driving member 350 to move away from the pipe mold along the Y direction together with the jacking device 200 and the nut locking device 100 after completing the tightening of the tensioning nut, so that the sleeve assembly 130 can be separated from the tensioning nut.

[0058] Further, the jacking device 200 is rotatably arranged on the sliding seat 320, and the mounting base 210 of the jacking device 200 is further provided with a fifth driving member 270, which is drivingly connected to the sliding seat 320. In the embodiment shown in the figure, the fifth driving member 270 can also be a servo motor, a stepping motor or the like driving source, which is used to drive the jacking device 200 to rotate together with the nut locking device 100 about an axis extending in the vertical direction. In an embodiment, as shown in Figure 9 the figure, the sliding seat 320 of the follower mechanism 300 is provided with a third gear 360, and the output end of the fifth driving member 270 is connected with a fourth gear 280 having a diameter much smaller than that of the third gear 360, and the fourth gear 280 and the third gear 360 are in mesh with each other. In this way, when the fourth driving member 350 drives the fourth gear 280 to rotate about the central axis thereof, the fourth gear 280 can also revolve about the central axis of the third gear 360, so that the jacking device 200 as a whole can also rotate about the central axis of the third gear 360. In this way, after the nut locking device 100 completes the locking of the tensioning nut, the fourth driving member 350 is first used to drive the sliding seat 320 to move along the Y direction, so that the jacking device 200 and the nut locking device 100 together move away from the pipe mold, and then the fifth driving member 270 is used to drive the jacking device 200 and the nut locking device 100 to rotate by 90°, so that the blocking rod 260 and the support frame 110 change from the vertical angle with the first sliding rail 310 to the parallel angle with the first sliding rail 310, thereby enabling the blocking rod 260 and the support frame 110 to avoid the flat car after the tensioning nut of the pipe mold is tightened, and enabling the flat car to continue to move along the Y direction to the position of the next process with the pipe mold carried thereon.

[0059] It should be noted that the structure of the follower mechanism 300 is not limited to the structure of the embodiment shown in Figure 7 the figure, and can also be other structure forms, for example, the first sliding rail 310 is directly mounted on the ground, the sliding seat 320 is directly slidably connected to the first sliding rail 310 without being connected through the rollers 370, or the jacking device 200 is rotatably connected to the sliding seat 320 of the follower mechanism 300 in other connection manners, all of which are not limited.

[0060] In addition, to ensure that the flatcar carrying the tube mold can begin to decelerate before touching the stop bar 260, the nut pre-tightening device also includes a photoelectric switch 400. In the embodiment shown in the figure, the photoelectric switch 400 is a through-beam type photoelectric switch 400, including a transmitting end and a receiving end. The transmitting end and the receiving end are respectively arranged at intervals on both sides of the follower device 300 along the X direction. The transmitting end is used to emit light, which is received by the receiving end. If the receiving end does not receive light, it indicates that the flatcar has arrived in position, and at this time, the flatcar begins to decelerate, so that the flatcar slowly touches the stop bar 260. Similarly, to ensure that each moving component in the follower device 300, lifting device 200, and nut locking device 100 of the nut pre-tightening device can stop in time after it has reached its position, each moving component in the follower device 300, lifting device 200, and nut locking device 100 is equipped with a proximity switch or photoelectric switch 400 at the position of maximum stroke. Since the proximity switch or photoelectric switch 400 are well-known technologies, they will not be described in detail here.

[0061] It should also be noted that the nut pre-tightening device provided in this application is not limited to the structure shown in the embodiment in the figure. It may also omit the follower device 300 and retain only the lifting device 200 and the nut locking device 100. Alternatively, it may omit both the follower device 300 and the lifting device 200 and retain only the nut locking device 100, that is, the nut locking device 100 is used alone. However, the nut pre-tightening device 10 in the embodiment shown in the figure has the most complete function, and there are no particular limitations on the above.

[0062] Finally, combine Figures 1 to 9 The working process of the nut pre-tightening device 10 in the embodiment shown in the figure will be described as follows:

[0063] In the first step, the flatcar carrying the tube mold reaches the position of the photoelectric switch 400. The flatcar begins to decelerate but continues to move forward in the Y direction. After the tension baffle of the tube mold touches the stop bar 260 of the lifting device 200, the flatcar and the tube mold stop due to resistance. At the same time, the second elastic element 340 of the follower device 300 undergoes a recoverable deformation. At this time, because the stop bar 260 is blocked by the tension baffle of the tube mold, the lifting device 200 and the nut locking device 100 cannot move in the Y direction towards the tube mold under the action of the elastic force generated by the second elastic element 340, but stop at the predetermined position.

[0064] Second step, sleeve assembly 130 of nut locking device 100 starts to rotate around its central axis until the first opening 130b of sleeve assembly 130 is set upwards and is in mutual alignment with the second opening 140a. Then the jacking device 200 starts to carry the nut locking device 100 for jacking, so that the tensioning screw rod can enter the cavity 130a of the sleeve assembly 130 until being supported by the support seat 150. In this process, if the central axis of the tensioning screw rod is not consistent with the position of the central axis of the sleeve assembly 130 in the X direction, since the nut locking device 100 has two first elastic elements 180 respectively arranged on both sides of the connecting block, when the tensioning screw rod touches the inner wall of the sleeve 131 in the sleeve assembly 130, the sleeve assembly 130 can drive the tensioning screw rod to move in the X direction for adaptive adjustment, so that the central axis of the tensioning screw rod is the same as the central axis of the sleeve assembly 130 in the X direction.

[0065] Third step, the blocking rod 260 moves relative to the support rod to avoid the nut locking device 100. At this time, since there is no blockage, the nut locking device 100 and the jacking device 200 move towards the pipe mold under the action of the elastic force generated by the second elastic element 340, so that the sleeve assembly 130 approaches the tensioning nut and is sleeved on the tensioning nut.

[0066] Fourth step, the first driving element 170 of the nut locking device 100 is started, so that the first driving element 170 drives the sleeve assembly 130 to rotate around its central axis to complete the locking of the tensioning nut.

[0067] Fifth step, after completing the locking of the tensioning nut, the fourth driving element 350 of the follower device 300 drives the jacking device 200 and the nut locking device 100 away from the pipe mold, so that the sleeve assembly 130 is separated from the tensioning nut, and then the fifth driving element 270 on the jacking device 200 drives the jacking device 200 to rotate together with the nut locking device 100, so that the blocking rod 260 and the support rod are rotated to a position parallel to the first sliding rail 310 of the follower device 300 to avoid the flat car, so that the flat car carrying the pipe mold continues to move to the next working position, and thus the whole working process of the nut pre-tightening device is completed.

[0068] Finally, it should be pointed out that the technical features of the above-described embodiments can be combined in any way. In order to make the description simple, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present description.

[0069] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A nut locking device, characterized by, The utility model relates to a nut locking device, which comprises a support frame, a base, a sleeve assembly and a first elastic element. The support frame is provided with two first connecting blocks arranged at intervals along a first horizontal direction. The base is slidably arranged on the support frame and can slide relative to the support frame along the first horizontal direction. The lower side of the base is provided with a second connecting block, and the opposite sides of the second connecting block are connected to the corresponding first connecting block through the first elastic element. The sleeve assembly is arranged on the upper side of the base, and the central axis of the sleeve assembly extends along a second horizontal direction perpendicular to the first horizontal direction.

2. The nut locking device according to claim 1, wherein The sleeve assembly is used to controllably drive the nut of the to-be-locked member to rotate around its central axis to lock the nut.

3. The nut locking device of claim 2, wherein The to-be-locked member is a pipe pile mold, which comprises a tensioning screw rod and a tensioning nut sleeved on the tensioning screw rod and threadedly connected with the tensioning screw rod.

4. The nut lock device of claim 2, wherein The nut locking device is configured to, while locking the tensioning nut, adaptively correct the position of the tensioning screw rod in the first horizontal direction through the elastic force of the first elastic element to center the pipe pile mold with the jack of a tensioning machine.

5. The nut locking device of claim 4, wherein The upper side of the base is further provided with a sleeve seat, a support seat and a first driving member. The sleeve assembly is coaxially and rotatably connected to the sleeve seat, and the first driving member is drivingly connected to the sleeve assembly through a transmission assembly to drive the sleeve assembly to rotate around its central axis. At least part of the support seat is coaxially arranged in the sleeve assembly to support the screw rod of the to-be-locked member. The sleeve assembly has a cavity extending through the axially opposite sides thereof. The outer peripheral surface of the sleeve assembly is provided with a first opening extending through the axially opposite sides thereof and communicating with the cavity. The outer peripheral surface of the sleeve seat is provided with a second opening extending through the axially opposite sides thereof and opening upward. The first opening can be aligned or misaligned with the second opening with the rotation of the sleeve assembly. The sleeve assembly comprises a sleeve and a first gear, which are connected to each other and coaxially arranged in the second horizontal direction. The transmission assembly comprises two second gears, which are arranged on the two sides of the first gear in the first horizontal direction and are respectively engaged with the first gear. The transmission assembly further comprises a first transmission wheel, a second transmission wheel, a third transmission wheel and a fourth transmission wheel. The first transmission wheel is coaxially connected to the output end of the first driving member. The second transmission wheel and the third transmission wheel are coaxially connected to one of the second gears. The fourth transmission wheel is coaxially connected to the other second gear. The first transmission wheel and the second transmission wheel are drivingly connected through a first transmission belt. The third transmission wheel is drivingly connected to the fourth transmission wheel through a second transmission belt.

6. A nut pre-tightening apparatus characterized by, The jacking device comprises a mounting base, a lifting frame and a second driving member, the second driving member is arranged on the mounting base, the lifting frame is connected to the mounting base in a lifting manner and is drivingly connected to the second driving member, the support frame of the nut locking device is connected to the lifting frame, and the second driving member is used to drive the lifting frame and the nut locking device to lift relative to the mounting base along a vertical direction.

7. The nut pre-stripping apparatus of claim 6, wherein, The jacking device further comprises a third driving member arranged on the mounting base and a blocking rod drivingly connected to the third driving member, the blocking rod is arranged in a spaced manner with the support frame along the second horizontal direction and is arranged in parallel with the support frame. The blocking rod is used to block the forward movement of the to-be-locked member along the second horizontal direction, and the third driving member is used to drive the blocking rod to move relative to the support frame to avoid the to-be-locked member, so that the nut locking device can move along the second horizontal direction to approach the nut locking device, and the sleeve assembly of the nut locking device can be sleeved on the nut of the to-be-locked member.

8. The nut pre-stripping apparatus of claim 7, wherein, The nut pre-tightening device further comprises a follow-up device, the follow-up device comprises a first sliding rail and a sliding seat, the sliding seat is slidably arranged on the first sliding rail and is connected to the first sliding rail through a second elastic member, the jacking device is arranged on the sliding seat, and the second elastic member is configured to provide an elastic force that enables the sliding seat, the jacking device and the nut locking device to move along the second horizontal direction and approach the to-be-locked member when the to-be-locked member touches the blocking rod and the blocking rod moves relative to the support frame to avoid the nut locking device.

9. The nut pre-stripping apparatus of claim 8, wherein, The follow-up device further comprises a fourth driving member drivingly connected to the sliding seat, and the fourth driving member is used to drive the sliding seat, the jacking device and the nut locking device to move along the second horizontal direction.

10. The nut pre-stripping apparatus of claim 8, wherein, The jacking device is rotatably arranged on the sliding seat, and a fifth driving member is further arranged on the mounting base of the jacking device, the fifth driving member is drivingly connected to the sliding seat and is used to drive the jacking device and the nut locking device to rotate around an axis extending along the vertical direction.

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