Hydraulic pier column reinforcement cage jig

Abstract

The present application relates to the technical field of reinforcement cage jig, in particular to a kind of pier column reinforcement cage hydraulic jig, which is composed of channel steel base, left jig, right jig, truss system and hydraulic drive device, the left jig is welded and fixed, and the right jig is connected with hydraulic slide base through truss system;Hydraulic cylinder drives slide base to make "outward-downward" compound sliding along inclined seat, and the inclined surface sliding table utilizes gravity component force to reduce the load of hydraulic cylinder, to realize full-automatic mould closing or mould stripping;Short sleeve pipe is welded longitudinally on the vertical column, and support rod assembly is inserted, left support rod is provided with torsional spring and pull rope, which can rotate 90 degrees to release the left side limit of reinforcement instantaneously;Right support rod is equipped with spring, and right stop rod is separated synchronously after buffering with the mould stripping process, to realize zero collision and zero damage.The whole mould stripping process of the device does not need manual component extraction, and has the characteristics of energy saving, safety and high efficiency, and is widely applicable to batch production of high-speed rail, highway and municipal bridge pier reinforcement cage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel cage bed jigs, in particular to a hydraulic steel cage bed jig for pier columns. BACKGROUND

[0002] In large concrete structures such as bridges and high-rise buildings, pier column steel cages are the core load-bearing components, and their manufacturing precision directly affects the structural safety and construction quality. Currently, the traditional mode of "manual line laying + simple bed jig" is generally used for the processing of steel cages: workers first insert the longitudinal main reinforcement into the positioning holes or clamping slots of the bed jig, and then manually wrap and bind the stirrups. This process has the following problems: after completing each section of the steel cage, multiple people need to work together to pull out the limiting round steel or baffle on both sides of the bed jig to separate the steel cage from the bed jig. For large-diameter and long-section steel cages, the pulling resistance is large, time-consuming and labor-intensive, and the already bound stirrups are easily displaced due to shaking. The traditional bed jig is mostly a fixed welded structure, and the spacing between the main reinforcements is measured manually or positioned by simple clamping slots, with an error of more than ±5mm. If the force is not uniform during demolding, it is easy to cause the steel cage to exceed the ovality tolerance or the stirrups to deform, and subsequent installation requires secondary correction.

[0003] In view of the above problems, there is an urgent need for a steel cage bed jig that can be quickly opened and closed, has high precision positioning, is highly versatile, and is safe to operate, to realize the mechanization and standardization of steel cage processing. SUMMARY

[0004] In view of the defects and problems of the traditional bed jig, such as low efficiency of manual pulling and positioning, large positioning error, and damage to the steel during demolding, the present application provides a hydraulic steel cage bed jig for pier columns, which automatically closes and opens the mold through a hydraulic inclined sliding table, and the left and right stop rods are rotated and spring-buffered to achieve zero-collision demolding, solving the problems of low efficiency, poor precision, and damage.

[0005] The technical problem solved by the present application is solved by the following solution: a hydraulic steel cage bed jig for pier columns, comprising a bed jig main body, a truss system, and a hydraulic drive device, wherein the bed jig main body is composed of a channel steel base, a left bed jig, and a right bed jig, the left and right bed jigs are parallel to each other and perpendicular to the channel steel base, the left bed jig is fixed on one side of the channel steel base, and the right bed jig is movably arranged on the other side of the channel steel base, a truss system is arranged on the outside of the right bed jig, the hydraulic drive device comprises an inclined seat inclined downward, a sliding seat is slidably fitted on the inclined seat, the right bed jig is connected to the sliding seat through the truss system, and a hydraulic cylinder is installed on the inclined seat to control the inclined left-right sliding of the sliding seat on the inclined seat, the hydraulic drive device drives the right bed jig to approach or move away from the left bed jig through the hydraulic cylinder, and the automatic closing and opening of the bed jig main body are realized.

[0006] The plurality of sleeves are longitudinally arranged on the uprights of the left and right racks, and the strut assemblies are sleeved in the sleeves, the left strut is sleeved in the sleeve on the left rack, the rotating rod is rotatably sleeved in the left strut, the left stop rod is arranged at the inner end of the rotating rod, and the control structure for controlling the left stop rod to rotate from the vertical state to the horizontal state is arranged on the left strut, the right strut is sleeved in the sleeve on the right rack, and the right stop rod is arranged at the inner end of the right strut.

[0007] Further, the inner end of the rotating rod is connected in the left strut through the torsion spring, the arc-shaped through slot is longitudinally and throughly formed on the left strut, the through hole is formed on the rotating rod at the position corresponding to the arc-shaped through slot, the pull rope is passed through the through hole, the pull rope is sequentially passed through the left struts on the same upright, and the upper and lower adjacent left struts are connected together.

[0008] Further, the right strut is slidably sleeved in the corresponding sleeve, the spring is sleeved on the right strut, one end of the spring is connected to the protrusion at the outer end of the right strut, and the other end of the spring is connected to the corresponding sleeve.

[0009] Further, the channel steel base is composed of a plurality of transverse channel steels, the left and right racks are composed of a plurality of uprights perpendicular to the transverse channel steels, each group of uprights corresponds to a transverse channel steel, and a rectangular rack is formed.

[0010] Further, the truss system comprises a support frame plate fixed to the outer side of the right rack, a rectangular frame is fixed to the outer side of the support frame plate, a bottom frame is welded and fixed to the bottom of the rectangular frame, and the bottom frame is installed on the hydraulic driving device.

[0011] Further, the two inclined seats in the hydraulic drive device are symmetrically arranged and fixed by the I-shaped steel, mounting seats are installed on the I-shaped steel and the sliding seat, the cylinder body and the piston rod of the hydraulic cylinder are hinged on the two mounting seats through a pin shaft, a sliding table is arranged on the inclined seat, a sliding plate matched with the sliding table is arranged on the bottom of the sliding seat, the sliding seat is sleeved on the sliding table through the sliding plate on the bottom, two groups of longitudinally arranged struts are symmetrically installed on the sliding seat, and the bottom frame of the truss system is horizontally installed on the struts through bolts.

[0012] Further, pin holes are formed in the left support rod, the right support rod and the corresponding sleeve, the pin holes are used for inserting pins, and locking and unlocking of the support rod assembly and the sleeve are realized through cooperation of the pins and the pin holes.

[0013] Further, the height of the right stop rod is less than the height difference of the right die carrier from the mold closing state to the die withdrawing state.

[0014] Further, the support rod assembly is provided with at least two groups and is symmetrically arranged on the left die carrier and the right die carrier.

[0015] The beneficial effects of the present application are as follows: through the collaborative design of hydraulic drive and mechanical structure, the efficiency and quality of the steel reinforcement cage forming are significantly improved. First, the inclined hydraulic sliding table mechanism is adopted, the traditional horizontal thrust is converted into the combined motion of outward and downward, the die withdrawing process does not need manual intervention, the single operation time is shortened, the efficiency is obviously improved, and the safety hidden danger caused by manual pulling of the limiting component is avoided; second, the die carrier is provided with high-precision positioning clamping plates, the size of the clamping groove is customized according to the diameter of the steel reinforcement, the construction requirements of high-speed rail, cross-sea bridge and other high-standard projects are met, and the precision is significantly better than that of the traditional manual line laying; in addition, through the setting of the left stop rod and the right stop rod, the limiting effect for the longitudinal main reinforcement is provided during the steel reinforcement bundling process, the steel reinforcement is prevented from falling, and when the die is withdrawn, the left stop rod is rotated by 90° through the torsional spring and the pulling rope, the limiting is instantaneously released when the die is withdrawn, and the right stop rod utilizes the spring to provide a buffer stroke, and the two cooperate to ensure that the steel reinforcement cage is free of friction and collision during the die withdrawing process, and the die withdrawing quality is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the present application;

[0017] Figure 2 It is an explosion structure schematic view of the present application;

[0018] Figure 3 It is a top view structure schematic view of the present application;

[0019] Figure 4 It is a die carrier main body partial structure schematic view of the present application;

[0020] Figure 5The hydraulic driving device structure schematic diagram of the present application;

[0021] Figure 6 The mold closing-drawing process schematic diagram of the main body of the present application;

[0022] Figure 7 The main body of the present application and the strut assembly structure schematic diagram;

[0023] Figure 8 The Figure 7 The structure schematic diagram of the enlarged A in the figure;

[0024] Figure 9 The Figure 7 The structure schematic diagram of the enlarged B in the figure;

[0025] Figure 10 The strut assembly front view structure schematic diagram of the present application;

[0026] Figure 11 The left strut structure variation schematic diagram of the present application;

[0027] Figure 12 The working flow schematic diagram of the second embodiment of the present application.

[0028] In the figure: 1, the main body of the jig; 1a, the left jig; 1b, the right jig; 101, the transverse channel steel; 102, the column; 103, the sleeve; 104, the positioning card plate; 2, the truss system; 201, the support frame plate; 202, the rectangular frame; 203, the bottom frame; 3, the hydraulic driving device; 301, the inclined seat; 302, the I-shaped steel; 303, the sliding seat; 304, the support column; 305, the mounting seat; 306, the hydraulic cylinder; 307, the reinforcing channel steel; 308, the sliding table; 309, the sliding plate; 4, the stepping ring; 5, the strut assembly; 51, the left strut; 511, the arc-shaped through slot; 512, the rotating rod; 513, the torsional spring; 514, the left blocking rod; 515, the through hole; 52, the right strut; 521, the spring; 522, the right blocking rod; 6, the pin hole; 7, the pin; 8, the top plate; 9, the pull rope. DETAILED DESCRIPTION

[0029] The present application is further illustrated below in combination with the drawings and embodiments.

[0030] Please refer to Figures 1-12 , the present application provides a kind of hydraulic jigs for pier column reinforcement cage technical scheme:

[0031] Embodiment one: according to Figures 1-6As shown, mainly includes the main body of the rack 1, truss system 2 and hydraulic drive device 3. The main body of the rack 1 is a cage-shaped cavity, which is composed of a channel steel base, a left rack 1a and a right rack 1b. The channel steel base is composed of a plurality of horizontal channel steels 101 laid equidistantly in the horizontal direction. The upper flange of each horizontal channel steel 101 serves as a bearing surface, and the lower flange directly falls on the ground or temporary support to form an overall load-bearing platform. The left rack 1a and the right rack 1b are parallel to each other and perpendicular to the channel steel base. The left rack 1a is vertically welded on the left side of the channel steel base, serving as a fixed reference. The right rack 1b is slidably installed on the right side of the channel steel base and can move back and forth along the length of the horizontal channel steel 101. When the left rack 1a and the right rack 1b are closed, they together with the channel steel base enclose a rectangular cage-shaped space. When the right rack 1b moves outward, the left rack 1a and the right rack 1b move away from each other, achieving automatic mold withdrawal of the main body of the rack 1. By setting the main body of the rack 1 as a split structure with one side fixed and the other side movable, it provides freedom for subsequent hydraulic automatic mold withdrawal, thereby avoiding the inefficient operation of manually pulling out the limiting components of the traditional rack.

[0032] The left rack 1a is composed of a plurality of vertical columns 102 welded with the horizontal channel steel 101 to form an L-shaped frame. The right rack 1b is composed of a plurality of vertical columns 102 perpendicular to the horizontal channel steel 101 without contact. The vertical columns 102 in the left rack 1a and the right rack 1b are oppositely arranged, and each group of vertical columns 102 corresponds to a horizontal channel steel 101. A rectangular cage is formed by two vertical columns 102 and a horizontal channel steel 101. A plurality of positioning clamping plates 104 are welded and fixed on the vertical columns 102 of the left rack 1a and the right rack 1b and the channel steel base in the direction of the main body of the rack 1. The positioning clamping plates 104 connect multiple rectangular cages to form the main body of the rack 1. The positioning clamping plates 104 are arranged in rows on the channel steel base, the left rack 1a and the right rack 1b of the main body of the rack 1, and the clamping slots are in the same direction. The clamping slots are used for precise positioning of the longitudinal main reinforcement, and the spacing of the clamping slots is based on the spacing and density of the reinforcement. Compared with the traditional manual line laying, the positioning clamping plate 104 controls the main reinforcement spacing error within ±2mm, and the depth of the clamping slot is slightly larger than the radius of the reinforcement, which ensures the positioning accuracy and facilitates the quick placement or removal of the reinforcement.

[0033] Short sleeves 103 are welded equidistantly along the height direction on the inner side of each vertical column 102 on the left rack 1a and the right rack 1b. The sleeves 103 are used to insert the supporting rods, which provide space for placing and supporting the reinforcement to facilitate the placement and bundling of the reinforcement. The insertion position and number of the supporting rods can be reasonably set according to the actual needs of the reinforcement bundling operation.

[0034] The truss system 2 is a bridge connecting the right jig frame 1b and the hydraulic drive device 3, which is composed of three parts of a support frame plate 201, a rectangular frame 202 and a bottom frame 203. The support frame plate 201 is directly welded on the outer side of the right jig frame 1b, so that the right jig frame 1b is uniformly stressed as a whole, the rectangular frame 202 is welded and fixed on the outer side of the support frame plate 201 to realize local reinforcement, and the support effect provided by the support frame plate 201 and the rectangular frame 202 makes the right jig frame 1b not be twisted and deformed under the action of the hydraulic thrust force. The bottom frame 203 is horizontally fixed on the slide 303 of the hydraulic drive device 3 by bolts. Through the truss system 2, the concentrated force output by the hydraulic cylinder 306 is converted into a uniformly distributed thrust force along the height direction of the right jig frame 1b, so as to ensure the smooth and non-stuck process of the mold clamping / mold stripping.

[0035] As shown in Figure 5 , the hydraulic drive device 3 is composed of two inclined seats 301 arranged symmetrically and inclinedly, a slide 303, a hydraulic cylinder 306 and an auxiliary slide-plate pair. The two inclined seats 301 are connected together by an I-shaped steel 302, and a reinforcing channel steel 307 is welded and fixed on the inclined seats 301 to improve the connection strength. The inclined seats 301 are inclined downward by about 10°-15°, the slide 303 is slidingly sleeved on the inclined seats 301 and can slide along the inclined surface of the inclined seats 301. The slide 303 is provided with a slide 308, and the slide 303 is provided with a slide plate 309 matched with the slide 308 at the bottom. The slide 303 is slidingly sleeved on the slide 308 through the slide plate 309 at the bottom. Two groups of longitudinally arranged support columns 304 are symmetrically installed on the slide 303. The bottom frame 203 of the truss system 2 is horizontally installed on the support columns 304 by bolts. The mounting seats 305 are installed and fixed at the center positions of the I-shaped steel 302 and the slide 303. The cylinder body of the hydraulic cylinder 306 is hinged to the mounting seat 305 on the I-shaped steel 302, and the piston rod end is hinged to the mounting seat 305 of the slide 303, forming an inclined slide-tube cylinder mechanism.

[0036] As shown in Figure 6 , when the piston rod is extended, the slide 303 moves upward along the inclined seats 301, and the right jig frame 1b approaches the left jig frame 1a to complete mold clamping; when the piston rod is retracted, the right jig frame 1b retreats obliquely downward to complete mold stripping. By setting the inclined seats 301 as inclined surfaces, on the one hand, the gravitational component force is used to reduce the return load of the hydraulic cylinder 306, and on the other hand, the right jig frame 1b generates a combined motion of "outward + downward" when stripping, so as to quickly separate from the reinforcement cage. Through the above scheme, the huge friction force required by the traditional horizontal push-pull is converted into controllable inclined sliding, which significantly reduces energy consumption and improves motion stability.

[0037] In specific use, before the reinforcement cage is formed, the piston rod of the hydraulic cylinder 306 is extended, the sliding seat 303 is pushed to slide obliquely upward along the inclined seat 301, the sliding seat 303 drives the right jig 1b to move towards the left jig 1a through the truss system 2, and the jig body 1 is completed. At this time, the channel steel base, the left jig 1a, the right jig 1b and the positioning clamping plate 104 jointly form a closed rectangular cavity, and the longitudinal main reinforcement can be directly positioned in the clamping groove of the positioning clamping plate 104; after the binding of the stirrup is completed, the hydraulic cylinder 306 is reversely retracted, the right jig 1b retreats along an obliquely downward trajectory, and is quickly separated from the reinforcement cage. The whole stripping process does not need to manually pull out any limiting part, and can be completed only by relying on the low-friction sliding of the obliquely arranged sliding table 308, thereby significantly reducing the labor intensity and avoiding the deformation of the reinforcement cage.

[0038] Embodiment two: on the basis of embodiment one, the same parts of the embodiment two and embodiment one will not be repeated, and the different parts are as follows: the support rod provided in embodiment one is improved in this embodiment.

[0039] As shown in Figures 7-12 , a support rod assembly 5 is used here. The support rod assembly 5 is divided into two groups of left support rods 51 and right support rods 52, and the left support rods 51 and the right support rods 52 are arranged in rows along the vertical columns 102 of the left jig 1a and the right jig 1b respectively. Its function is to provide internal limiting for the longitudinal main reinforcement in the closed die state, so as to prevent the steel bars from tilting inward or falling off during the binding or transportation process.

[0040] Specifically, as shown in Figure 8 , a rotatable rotating rod 512 is coaxially sleeved in the left support rod 51, and a left blocking rod 514 is vertically welded at the inner end of the rotating rod 512. The left blocking rod 514 can rotate 90° with the rotating rod 512: when the left blocking rod 514 is in the vertical state, it can provide limiting for the steel bars, and when the left blocking rod 514 is in the horizontal state, it releases the limiting, which is convenient for the reinforcement cage to exit; the right end of the right support rod 52 is vertically welded with a right blocking rod 522, and the right blocking rod 522 always maintains a vertical posture. Through the limiting effect provided by the left blocking rod 514 and the right blocking rod 522, reliable constraint can be provided for the steel bars placed by the reinforcement cage in the forming stage, and the steel bars can be effectively prevented from falling off.

[0041] The state switching of the left stop lever 514 is controlled by a control structure, mainly including a torsion spring 513 and a pull rope 9. The torsion spring 513 is pre-installed between the rotating rod 512 and the left support rod 51, and provides the rotating rod 512 with torsion and reset functions through the torsion spring 513. An arc-shaped through groove 511 is longitudinally opened on the left support rod 51, and a through hole 515 is opened on the rotating rod 512 at the position corresponding to the arc-shaped through groove 511. The pull rope 9 is inserted into the through hole 515. The pull rope 9 passes through the left support rods 51 on the same column 102 in sequence. The pull rope 9 connects the upper and lower adjacent left support rods 51 together, and the upper end of the pull rope 9 is fixedly connected to the top plate 8 at the top of the column 102. The lower end of the pull rope 9 is connected to a foot ring 4. When the main body 1 of the formwork is in its normal closed state, the torsion spring 513 is relaxed, and the left stop bar 514 extends vertically, serving to block the reinforcing bars. When demolding is required, the worker steps on the foot ring 4, causing the pull rope 9 to move downwards. The pull rope 9 is tightened, and through the through hole 515 of the left support bar 51 of each layer, it drives all the rotating rods 512 to rotate synchronously by 90°, so that the left stop bar 514 changes from vertical to horizontal, instantly releasing the restriction on the reinforcing cage. Figure 11 As shown; at the same time, the torsion spring 513 is energized during this process. After the foot ring 4 is released, the torsion spring 513 releases energy, and the left stop bar 514 automatically returns to vertical position, preparing for the next cycle. This method greatly improves the demolding efficiency.

[0042] The retraction of the right stop lever 522 is accomplished by the coordinated action of spring 521 and hydraulic cylinder 306. For example... Figure 9 As shown, the right support rod 52 is horizontally slidably fitted inside the sleeve 103. A spring 521 is fitted on the right support rod 52, with its two ends connected to the boss at the outer end of the right support rod 52 and the sleeve 103, respectively. The compression effect of the spring 521 provides a certain buffer space for the right stop rod 522. When the mold frame is closed, the spring 521 is in a freely extended state, and the right stop rod 522 provides a limit for the main reinforcement. When the mold is unloaded, the hydraulic cylinder 306 drives the right mold frame 1b to move backward diagonally downward. The right stop rod 522 initially remains in a fixed position due to the weight of the reinforcement cage. As the right mold frame 1b moves backward, the spring 521 is gradually compressed, providing a certain holding distance for the right stop rod 522. When the spring 521 is compressed to its limit, the hydraulic cylinder 306 simultaneously drives the right mold frame 1b and the right stop rod 522 to move backward, through the right stop rod 522... Rod 522 pulls the rebar cage to the right, causing it to move away from the range of the left stop rod 514. Then, the right jig 1b and the rebar cage continue to retreat. When the retreat height of the right jig 1b exceeds the height of the right stop rod 522, the right stop rod 522 automatically retreats from under the main reinforcement of the rebar cage, releasing the restriction on the rebar cage. At the same time, spring 521 provides a buffer effect for the right stop rod 522, allowing it to smoothly leave the rebar cage without impact. At this time, the restrictions on both sides of the rebar cage are released, making it easier to carry out hoisting operations.

[0043] The height of the right blocking rod 522 is less than the stripping stroke, that is, the height of the right blocking rod 522 is always less than the height displacement difference of the right bed 1b from the clamping to the complete stripping, so that the right blocking rod 522 does not interfere with the reinforcement cage again during the stripping process, and the stripping smoothness is further improved.

[0044] The support rod assembly 5 is arranged symmetrically at the front and rear ends of the left bed 1a and the right bed 1b, and forms a four-point or multi-point positioning layout, so that the reinforcement cage is uniformly stressed in the longitudinal direction, and the straightness of the finished reinforcement cage is ensured.

[0045] In specific use, the pier reinforcement cage hydraulic bed of the application, in the clamping stage, the left blocking rod 514 is kept vertical under the action of the torsional spring 513, and the right blocking rod 522 is kept extended under the action of the spring 521, both of which form a limit for the reinforcement, so as to ensure that the longitudinal reinforcement does not fall or dislocate during the binding process; when stripping, the worker steps on the pedal ring 4, the pull rope 9 drives all the rotating rods 512 in the left support rod 51 to rotate synchronously by 90°, the left blocking rod 514 is turned from vertical to horizontal, and the left limit is instantaneously released; at the same time, the hydraulic cylinder 306 drives the right bed 1b to retreat obliquely downward, and the right blocking rod 522 obtains a buffer stroke due to the compression of the spring 521, and is first stationary with the reinforcement cage and then retreats with the right bed 1b until completely separated from the bottom edge of the reinforcement cage, so as to realize smooth stripping without collision and jamming; the resetting force of the torsional spring 513 ensures that the left blocking rod 514 can be automatically reset in the next cycle, and the whole process is simple to operate.

[0046] In example three, on the basis of example two, pin holes 6 are opened on the left support rod 51, the right support rod 52 and the corresponding sleeve 103, the pin holes 6 are used for inserting pins 7, and the locking and unlocking of the support rod assembly 5 and the sleeve 103 are realized through the cooperation of the pins 7 and the pin holes 6. Specifically, since the left support rod 51 needs to be fixedly sleeved in the sleeve 103, so as to realize the rotation of the rotating rod 512, therefore, the left support rod 51 and the corresponding sleeve 103 are locked through the pins 7 and the pin holes 6; since the right support rod 52 needs to cooperate with the spring 521 to realize a certain distance buffer, therefore, the right support rod 52 does not need to be locked.

[0047] The above only describes the preferred embodiments of the application, and does not limit the application, any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A hydraulic jig for a steel reinforcement cage of a pier column, comprising a jig body (1), characterized in that, It also includes a truss system (2) and a hydraulic drive device (3). The main body (1) of the jig is composed of a channel steel base, a left jig (1a) and a right jig (1b). The left jig (1a) and the right jig (1b) are parallel to each other and perpendicular to the channel steel base. The left jig (1a) is fixed to one side of the channel steel base, and the right jig (1b) is movably disposed on the other side of the channel steel base. A truss system (2) is provided on the outside of the right jig (1b). The hydraulic drive device (3) includes a downwardly inclined... An inclined seat (301) is provided, on which a slide seat (303) is slidably mounted. The right mold frame (1b) is connected to the slide seat (303) through a truss system (2). A hydraulic cylinder (306) is installed on the inclined seat (301) to control the slide seat (303) to slide obliquely to the left and right on the inclined seat (301). The hydraulic drive device (3) drives the right mold frame (1b) to approach or move away from the left mold frame (1a) through the hydraulic cylinder (306), thereby realizing the automatic mold closing and mold unloading of the mold frame body (1). Multiple sleeves (103) are arranged longitudinally on the uprights (102) of the left and right tire frames (1a and 1b). A strut assembly (5) is fitted inside each sleeve (103). The strut assembly (5) is divided into two groups: a left strut (51) and a right strut (52). The left strut (51) and right strut (52) are arranged in a row longitudinally along the uprights (102) of the left and right tire frames (1a and 1b, respectively). The left strut is fitted inside the sleeve (103) on the left tire frame (1a). A rod (51) is rotatably fitted inside the left support rod (51). A left stop rod (514) is provided at the inner end of the rotating rod (512). A control structure is provided on the left support rod (51) to control the left stop rod (514) to change from vertical to horizontal. A right support rod (52) is fitted inside the sleeve (103) on the right frame (1b). A right stop rod (522) is provided at the inner end of the right support rod (52). The right stop rod (522) always remains vertical.

2. The hydraulic jig for a steel reinforcement cage of a pier column according to claim 1, characterized in that, The inner end of the rotating rod (512) is connected to the left support rod (51) by a torsion spring (513). The left support rod (51) has a longitudinally penetrating arc-shaped through groove (511). A through hole (515) is opened on the rotating rod (512) at a position corresponding to the arc-shaped through groove (511). A pull rope (9) is threaded through the through hole (515). The pull rope (9) passes through the left support rods (51) on the same column (102) in sequence, connecting the adjacent left support rods (51) together. The upper end of the pull rope (9) is fixedly connected to the top plate (8) at the top of the column (102). The lower end of the pull rope (9) is... The end is connected to a step ring (4); when the main body of the mold frame (1) is in the mold-closed state, the torsion spring (513) is not in the stored state, the through hole (515) is in the horizontal state, and the left stop (514) is in the vertical state, preventing the steel bars from falling; when it is necessary to remove the mold, pull the pull rope (9) downwards, and the through hole (515) is pulled from the horizontal state to the vertical state by the force of the pull rope (9) and the through hole (515), which drives the rotating rod (512) to rotate 90°, so that the left stop (514) turns to the horizontal state, releasing the obstruction to the steel bars. At the same time, the torsion spring (513) is in the stored state, waiting to provide kinetic energy for the left stop (514) to rotate and reset.

3. The hydraulic jig for a steel reinforcement cage of a pier column according to claim 1, characterized in that, The right support rod (52) is slidably fitted inside the corresponding sleeve (103). A spring (521) is fitted on the right support rod (52). One end of the spring (521) is connected to the protrusion at the outer end of the right support rod (52), and the other end is connected to the corresponding sleeve (103). During the demolding process of the right die frame (1b) driven by the hydraulic drive device (3), the stretching of the spring (521) provides a buffer distance for the right stop rod (522).

4. The hydraulic jig for a steel reinforcement cage of a pier column according to claim 1, characterized in that, The channel steel base is composed of multiple transverse channel steels (101). The left jig (1a) and right jig (1b) are composed of multiple columns (102) perpendicular to the transverse channel steels (101). Each set of columns (102) corresponds to one transverse channel steel (101) and forms a rectangular jig frame. Multiple positioning plates (104) are welded and fixed on the left jig (1a), right jig (1b) and channel steel base. The positioning plates (104) connect multiple rectangular jig frames to form the jig frame body (1). The positioning plates (104) are provided with slots for positioning the reinforcing bars.

5. The hydraulic jig for a steel reinforcement cage of a pier column according to claim 1, characterized in that, The truss system (2) includes a support frame plate (201) fixed to the outside of the right frame (1b), a rectangular frame (202) fixed to the outside of the support frame plate (201), a bottom frame (203) welded to the bottom of the rectangular frame (202), and the bottom frame (203) mounted on the hydraulic drive device (3).

6. The hydraulic jig for a steel reinforcement cage of a pier column according to claim 1, characterized in that, The two inclined seats (301) in the hydraulic drive device (3) are symmetrically arranged and connected and fixed by I-beams (302). Mounting seats (305) are installed on both the I-beams (302) and the slide (303). The cylinder body and piston rod of the hydraulic cylinder (306) are hinged to the two mounting seats (305) by pins. The inclined seat (301) is provided with a slide (308). A sliding plate (309) matching the slide (308) is provided at the bottom of the slide (303). The slide (303) is slidably mounted on the slide (308) by the sliding plate (309) at the bottom. Two sets of longitudinally arranged columns (304) are symmetrically installed on the slide (303). The bottom frame (203) of the truss system (2) is horizontally installed on the columns (304) by bolts.

7. A hydraulic jig for a steel reinforcement cage of a pier column according to claim 2 or 3, characterized in that, The left support rod (51), right support rod (52) and corresponding sleeve (103) have pin holes (6), which are used to insert pins (7). The locking and unlocking of the support rod assembly (5) and the corresponding sleeve (103) are achieved through the cooperation of the pins (7) and the pin holes (6).

8. The hydraulic jig for a steel reinforcement cage of a pier column according to claim 3, characterized in that, The height of the right stop bar (522) is less than the height difference between the right mold frame (1b) when it changes from the mold-closed state to the mold-unclosed state.

9. A hydraulic jig for a steel reinforcement cage of a pier column according to claim 2 or 3, characterized in that, The strut assembly (5) is provided in at least two sets and is symmetrically arranged on the left frame (1a) and the right frame (1b).

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