A hydraulic gantry

Abstract

The present invention discloses a hydraulic gantry, which belongs to the technical field of gantry, and solves the technical problem that the existing hydraulic gantry needs manual pins and has a large safety risk. The lifting tower of the present invention includes a telescopic column sheath, and the telescopic column sheath is provided with a first-stage telescopic column, a second-stage telescopic column, and a single-stage lifting oil cylinder. The top of the second-stage telescopic column is provided with a pin connection mechanism, and the pin connection mechanism includes at least one first pin and at least one second pin. The first pin and the second pin are both connected to a first telescopic driving member, and a control module is electrically connected to the first telescopic driving member. The bottom of the first-stage telescopic column is provided with a first pin hole corresponding to the first pin, and the top of the single-stage lifting oil cylinder is provided with a second pin hole corresponding to the second pin. The top of the telescopic column sheath is provided with at least one set of wedge clamping mechanisms for clamping the second-stage telescopic column. The manual pin can be replaced by the first telescopic driving member pin, and the second-stage telescopic column can be clamped by the wedge clamping mechanism to prevent it from sliding down.

Description

Technical Field

[0001] The present invention relates to the technical field of gantry, and more particularly to a hydraulic gantry. Background Art

[0002] The existing hydraulic gantry structure consists of two or four lifting units with multi-section telescopic columns. The lifting unit includes a lifting tower, a modular guide rail, and a hydraulic station. The lifting cylinder of the lifting tower is a multi-stage cylinder. When the last stage of the multi-stage cylinder is working, the attenuation of the lifting tower workload is relatively large, about 40%, compared with the first stage of the cylinder working. Moreover, when the telescopic columns of the lifting tower are switched, due to the structure of the telescopic columns, a latch needs to be inserted between the telescopic columns to transfer the load. This work is done manually, so the time required for the equipment to work is relatively long and the efficiency is relatively low. Moreover, because the objects being lifted are heavy, there is a greater safety risk when using manual latches. Summary of the invention

[0003] The technical problem to be solved by the present invention is aimed at the above-mentioned deficiencies in the prior art. The purpose of the present invention is to provide a hydraulic gantry, in which the load of the lifting tower will not decay and no manual pins are required.

[0004] The technical solution of the present invention is: a hydraulic gantry, including an even number of lifting units, the even number of lifting units are respectively divided into two groups on average, the two groups of lifting units are respectively installed on two combined guide rails, a hanging beam frame is connected between the lifting units, the hanging beam frame is provided with a hanging device trolley, the lifting unit includes a tower base, the bottom of the tower base is provided with a walking mechanism in contact with the combined guide rail, a hydraulic pump station and a control module electrically connected to the hydraulic pump station are provided in the tower base, a jacking tower is provided on the top of the tower base, the jacking tower includes a telescopic column sleeve connected to the top of the tower base, a first-stage telescopic column, a second-stage telescopic column, and a single-stage jacking cylinder are provided in the telescopic column sleeve, and the first The first-stage telescopic column is located in the second-stage telescopic column, the single-stage lifting cylinder is located in the first-stage telescopic column, the top of the first-stage telescopic column is connected to the suspension beam frame, the hydraulic pump station is connected to the walking mechanism and the single-stage lifting cylinder through an oil circuit, at least one group of pin connection mechanisms are provided on the top of the second-stage telescopic column, the pin connection mechanism includes at least one first pin and at least one second pin, the first pin and the second pin are both connected to a first telescopic driving member, the control module is electrically connected to the first telescopic driving member, the bottom of the first-stage telescopic column is provided with a first pin hole corresponding to the first pin, and the top of the single-stage lifting cylinder is provided with a second pin hole corresponding to the second pin.

[0005] As a further improvement, the bottom of the single-stage lifting cylinder is rotatably connected to the tower base.

[0006] Furthermore, the travel mechanism includes active travel wheels in contact with the combined guide rails, and a travel hydraulic motor connected to the active travel wheels, and the hydraulic pump station is connected to the travel hydraulic motor via an oil circuit.

[0007] Furthermore, a ball head mechanism is provided on the top of the first-stage telescopic column, and the ball head mechanism is connected to the suspension beam frame via a jacking turntable.

[0008] Furthermore, the number of the first pin is 1, the number of the second pins is 2, and the two second pins are respectively located on both sides of the first pin.

[0009] Furthermore, the number of the pin connection mechanisms is 2 groups, and the 2 groups of pin connection mechanisms are respectively located on two opposite sides of the top of the second-stage telescopic column.

[0010] Furthermore, at least one set of wedge clamping mechanism is provided at the top of the telescopic column sleeve, and the wedge clamping mechanism includes a fixed wedge installed on the inner wall of the telescopic column sleeve, and the fixed wedge is provided with a wedge surface on the side away from the telescopic column sleeve, and the wedge surface is provided with a movable wedge in sliding contact, and the top of the movable wedge is rotatably provided with a first connecting rod, and the top of the first connecting rod is rotatably provided with a second connecting rod, and the upper end of the second connecting rod is fixedly connected with a rotating shaft, and the rotating shaft is rotatably installed on the top of the telescopic column sleeve, and one end of the rotating shaft is provided with a driving mechanism for driving the rotating shaft to rotate so as to drive the movable wedge to clamp the second-stage telescopic column.

[0011] Furthermore, a side wall of the movable wedge away from the fixed wedge is provided with an anti-slip structure.

[0012] Further, the driving mechanism includes a second telescopic driving member, the protruding end of the second telescopic driving member is rotatably connected to a connecting sleeve, a limiting shaft and a spring sleeved on the outer periphery of the limiting shaft are provided in the connecting sleeve, a baffle is provided at one end of the rotating shaft, a limiting groove is provided at one end of the baffle, the width or length of the limiting groove is greater than the size of the cross-section of the limiting shaft, the limiting shaft passes through the limiting groove and is provided with a limiting nut.

[0013] Furthermore, it also includes a detection sensor for detecting that the movable wedge has moved into position.

[0014] Beneficial Effects

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The present invention can reciprocate on the combined guide rail through the walking mechanism installed on the tower base; when the telescopic column is working, the load of the jacking tower will not decay, and when the telescopic column performs load conversion, the electric push rod is used to drive the pin to be inserted into the telescopic column to convert the load, which shortens the time for the equipment to complete the work, improves the work efficiency of the equipment and greatly reduces the safety risk of lifting heavy objects.

[0017] 2. When the hydraulic gantry of the present invention needs to stop lifting for a long time with a load in the middle, the wedge clamping mechanism clamps the second-stage telescopic column to prevent it from sliding down, thereby preventing the risk of the load sliding down and falling due to leakage of hydraulic oil in the hydraulic chamber of the balance valve of the lifting cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic structural diagram of two lifting units;

[0019] Figure 2 The present invention is a schematic structural diagram of four lifting units;

[0020] Figure 3 It is a structural schematic diagram of the lifting unit in the present invention;

[0021] Figure 4 is a cross-sectional view of the lifting unit in the present invention;

[0022] Figure 5 for Figure 3 The enlarged view of point A in the middle;

[0023] Figure 6 for Figure 4 The enlarged view of point B in the middle;

[0024] Figure 7 for Figure 3 Enlarged view of point C in the middle;

[0025] Figure 8 for Figure 3 The enlarged view of point D in the middle;

[0026] Fig. 9 for Figure 8 Enlarged view of point E in the middle;

[0027] Fig.10 It is a schematic diagram of the three-dimensional structure of the wedge clamping mechanism of the present invention installed on the telescopic column sheath;

[0028] Fig.11 It is a schematic diagram of the main structure of the wedge clamping mechanism of the present invention installed on the telescopic column sheath;

[0029] Fig.12 It is a cross-sectional view of the wedge clamping mechanism of the present invention installed on the telescopic column sheath;

[0030] Fig.13 It is a three-dimensional structural schematic diagram of the wedge clamping mechanism in the present invention.

[0031] Among them: 1-lifting unit, 2-combined guide rail, 3-hanging beam frame, 4-hanging trolley, 5-tower base, 6-travel mechanism, 7-hydraulic pump station, 8-control module, 9-lifting tower, 10-telescopic column sleeve, 11-first stage telescopic column, 12-second stage telescopic column, 13-single-stage lifting cylinder, 14-pin connection mechanism, 15-first latch, 16-second latch, 17-first telescopic drive member, 19-second pin hole, 20-active travel wheel, 21-ball head mechanism, 22 -lifting turntable, 23-wedge clamping mechanism, 24-fixed wedge, 25-movable wedge, 26-first connecting rod, 27-second connecting rod, 28-rotating shaft, 29-anti-slip structure, 30-second telescopic driving member, 31-connecting sleeve, 32-limiting shaft, 33-spring, 34-baffle, 35-limiting groove, 36-limiting nut, 37-detection sensor, 38-bearing seat, 39-sensor plate, 40-mounting frame, 41-mounting groove, 42-sleeve, 43-pin shaft. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0033] See also Figures 1 to 13 , a hydraulic gantry, comprising an even number of lifting units 1, such as Figure 1 The structure diagram of the present invention including two lifting units is shown as follows: Figure 2 The structure diagram of the present invention includes four lifting units. The specific number of lifting units 1 is determined according to the weight to be lifted. The even number of lifting units 1 is divided into two groups on average. The two groups of lifting units 1 are respectively installed on two combined guide rails 2. The lifting units 1 can reciprocate along the combined guide rails 2. A hanging beam frame 3 is connected between the lifting units 1. The hanging beam frame 3 is provided with a hanging trolley 4. The hanging trolley 4 is used to lift heavy objects.

[0034] The lifting unit 1 includes a tower base 5, and a traveling mechanism 6 in contact with the combined guide rail 2 is provided at the bottom of the tower base 5. A hydraulic pump station 7 and a control module 8 electrically connected to the hydraulic pump station 7 are provided in the tower base 5. A jacking tower 9 is provided at the top of the tower base 5, and the jacking tower 9 includes a telescopic column sleeve 10 connected to the top of the tower base 5, and a first-stage telescopic column 11, a second-stage telescopic column 12, and a single-stage jacking cylinder 13 are provided in the telescopic column sleeve 10. The first-stage telescopic column 11 is located in the second-stage telescopic column 12, and the single-stage jacking cylinder 13 is located in the first-stage telescopic column 11, and the top of the first-stage telescopic column 11 is connected to the hanging beam frame 3. The hydraulic pump station 7 is connected to the traveling mechanism 6 and the single-stage jacking cylinder 13 through an oil circuit. At least one set of pin connection mechanisms 14 is provided at the top of the second-stage telescopic column 12, and the pin connection mechanism 14 includes at least one first latch 15 and at least one second latch 16. The first latch 15 and the second latch 16 are both connected to a first telescopic drive member 17, and the control module 8 is electrically connected to the first telescopic drive member 17. A first pin hole corresponding to the first latch 15 is provided at the bottom of the first-stage telescopic column 11, which is used to connect the first-stage telescopic column 11 with the second-stage telescopic column 12, and a second pin hole 19 corresponding to the second latch 16 is provided at the top of the single-stage lifting cylinder 13, which is used to connect the second-stage telescopic column 12 with the single-stage lifting cylinder 13.

[0035] The bottom of the telescopic column sheath 10 is welded to the tower base 5 , and the bottom of the single-stage lifting cylinder 13 is rotatably connected to the tower base 5 .

[0036] The travel mechanism 6 includes an active travel wheel 20 in contact with the combined guide rail 2, a driven travel wheel, and a travel hydraulic motor connected to the active travel wheel 20. The active travel wheel 20 is located at one end of the tower base 5, and the driven travel wheel is located at the other end of the tower base 5. The driven travel wheel is provided with an encoder, and the encoder feeds back the travel data to the control module 8. The hydraulic pump station 7 is connected to the travel hydraulic motor through an oil circuit. The control module 8 controls the hydraulic pump station 7 to work, and the hydraulic pump station 7 controls the travel hydraulic motor to drive the active travel wheel 20 to rotate and the single-stage lifting cylinder 13 to work.

[0037] A wire displacement sensor is provided on the top of the first telescopic driving member 17 for monitoring the lifting data and feeding back the data to the control module 8 .

[0038] The first telescopic driving member 17 is any one of an electric push rod, an air cylinder, and an oil cylinder.

[0039] A ball head mechanism 21 is provided on the top of the first-stage telescopic column 11. The ball head mechanism 21 adopts an existing mature ball head mechanism. The ball head mechanism 21 is connected to the hanging beam frame 3 through a jacking turntable 22, so that the jacking turntable 22 can be floated and adjusted (ball rotation adjustment) during the working process.

[0040] Preferably, there are two groups of pin-connecting mechanisms 14, and the two groups of pin-connecting mechanisms 14 are respectively located on two opposite sides of the top of the second-stage telescopic column 12. Each group of pin-connecting mechanisms 14 has one first latch 15 and two second latches 16, and the two second latches 16 are respectively located on both sides of the first latch 15. That is, there are two first latches 15 and four second latches 16.

[0041] When the hydraulic gantry needs to stop lifting for a long time with a load in the middle, the hydraulic oil in the hydraulic chamber of the balance valve of the lifting cylinder may leak, causing the load to slide down and fall. As a further improvement, at least one set of wedge clamping mechanism 23 is provided at the top of the telescopic column sheath 10. The wedge clamping mechanism 23 includes a fixed wedge 24 installed on the inner wall of the telescopic column sheath 10. The fixed wedge 24 is provided with a wedge surface on the side away from the telescopic column sheath 10. The wedge surface is provided with a movable wedge 25 in sliding contact. The top of the movable wedge 25 is rotatably provided with a first connecting rod 26. The top of the first connecting rod 26 is rotatably provided with a second connecting rod 27. The upper end of the second connecting rod 27 is fixedly connected with a rotating shaft 28. The rotating shaft 28 is rotatably installed on the top of the telescopic column sheath 10. One end of the rotating shaft 28 is provided with a driving mechanism that drives the rotating shaft 28 to rotate to drive the movable wedge 25 to clamp the second-stage telescopic column 12. The inner wall of the telescopic column sheath 10 is provided with a mounting groove 41. The fixed wedge 24 is installed in the mounting groove 41 by bolts.

[0042] The side wall of the movable wedge 25 away from the fixed wedge 24 is provided with an anti-skid structure 29. That is, the side wall of the movable wedge 25 used to clamp the second-stage telescopic column 12 is provided with an anti-skid structure 29 to increase friction. Preferably, the anti-skid structure 29 is an anti-skid tooth.

[0043] The rotating shaft 28 is rotatably mounted on the top of the telescopic column sleeve 10 through the bearing seat 38, that is, the rotating shaft 28 is mounted in the bearing seat 38 through the bearing.

[0044] Preferably, the number of fixed wedges 24 and movable wedges 25 is two groups, and the two groups of fixed wedges 24 and movable wedges 25 are respectively installed on both sides of the inner wall of the telescopic column sheath 10, which can increase the contact area between the movable wedges 25 and the second-stage telescopic column 12 to improve the clamping stability. The number of bearing seats 38 is 4, which are evenly divided into two groups. Each group of fixed wedges 24 and movable wedges 25 is installed between two bearing seats 38 of the same group, which can reduce the deformation of the rotating shaft 28 when the movable wedge 25 clamps the second-stage telescopic column 12 to ensure the clamping force. Specifically, the upper end of the second connecting rod 27 is fixedly connected with a sleeve 42, and the sleeve 42 is located between the two bearing seats 38 of the same group. The sleeve 42 and the rotating shaft 28 are limited by a key, and the sleeve 42 and the rotating shaft 28 are interference fit.

[0045] In one embodiment, the driving mechanism includes a second telescopic driving member 30, and the protruding end of the second telescopic driving member 30 is rotatably connected to a connecting sleeve 31. Specifically, the protruding end of the second telescopic driving member 30 is rotatably connected to the connecting sleeve 31 through a pin shaft 43. A limiting shaft 32 and a spring 33 sleeved on the periphery of the limiting shaft 32 are arranged in the connecting sleeve 31. A baffle 34 is arranged at one end of the rotating shaft 28, and a limiting groove 35 is arranged at one end of the baffle 34. The width or length of the limiting groove 35 is greater than the size of the cross section of the limiting shaft 32. The limiting shaft 32 passes through the limiting groove 35 and is provided with a limiting nut 36. When the limiting shaft 32 swings up and down, it will not be stuck in the limiting groove 35, and the limiting shaft 32 will not be separated from the limiting groove 35. Specifically, the limiting groove 35 is a waist-shaped hole arranged in the up and down direction.

[0046] Preferably, the second telescopic driving member 30 is any one of an electric push rod, a pneumatic cylinder, and an oil cylinder.

[0047] The working process of the wedge clamping mechanism 23 is:

[0048] When the second-stage telescopic column 12 of the hydraulic gantry is working, the electric push rod is not energized, the push rod retracts, driving the spring 33 on the connecting sleeve 31 to be in a natural state, the movable wedge 25 to be in a relaxed state, the friction between the second-stage telescopic column 12 and the movable wedge 25 is very small, and the normal extension and retraction of the second-stage telescopic column 12 is not affected.

[0049] When the second-stage telescopic column 12 of the hydraulic gantry stops working, the control module 8 supplies power to the electric push rod, which is powered first and extends (after the push rod is extended to the right position, the electric push rod can be powered off to keep the push rod in the extended state), driving the spring 33 on the connecting sleeve 31 to be in a compressed state. The spring 33 is compressed, and the compression force of the spring directly acts on the baffle 34 of the rotating shaft 28, pushing the baffle 34 to rotate, thereby driving the movable wedge 25 to move downward. The surface of the movable wedge 25 is processed with fine teeth, which can bite and embed into the surface of the second-stage telescopic column 12 in contact with it, generating a sufficiently large friction resistance, thereby preventing the second-stage telescopic column 12 from sliding down, thereby preventing the load from sliding down and falling.

[0050] In another embodiment, the driving mechanism may also be any one of an electric motor, a pneumatic motor, and a hydraulic motor, that is, the rotating shaft 7 is directly driven to rotate by the driving mechanism.

[0051] In one embodiment, the hydraulic gantry further includes a detection sensor 37 for detecting whether the movable wedge 25 has moved into position, and the detection sensor 37 is electrically connected to the control module 8. Figure 8 , Fig. 9As shown, the detection sensor 37 is installed on the top of the telescopic column sheath 10 through a mounting frame 40, and the mounting frame 40 is a U-shaped frame structure surrounding the outer periphery of the second connecting rod 27. The detection sensor 37 detects whether the movable wedge 25 moves to the right position by directly sensing the second connecting rod 27. Alternatively, a sensing sheet 39 is provided on the top of the movable wedge 25, and the detection sensor 37 detects whether the movable wedge 25 moves to the right position by sensing the sensing sheet 39. The detection sensor 37 is a proximity switch (Hall proximity switch or mechanical contact proximity switch) or a photoelectric sensor.

[0052] In one embodiment, as a preferred solution, two sets of wedge clamping mechanisms 23 are provided on the top of the telescopic column sheath 10, and the two sets of wedge clamping mechanisms 23 are respectively installed on the opposite sides of the top of the telescopic column sheath 10. The second-stage telescopic column 12 is clamped at the same time through the movable wedges 25 on both sides, so that the clamping effect is better and the stability is higher.

[0053] The control module 8 is a PLC or a single-chip microcomputer or an industrial control computer. One of the control modules 8 is used as a host, and the other control modules 8 are used as slaves, and the control modules 8 are connected to each other by communication. The host obtains the walking data of each slave, and sends each walking speed instruction to each slave. The host and each slave control the walking hydraulic motor according to the walking speed instruction to realize the synchronous walking of the hydraulic gantry. The host obtains the lifting data of each slave, and sends each lifting speed instruction to each slave. The host and each slave control the single-stage lifting cylinder 13 according to the lifting speed instruction to realize the synchronous lifting of the hydraulic gantry.

[0054] Working principle of this hydraulic gantry:

[0055] When the first telescopic column 11 needs to be extended alone, the single-stage lifting cylinder 13 directly lifts the first telescopic column 11 to the required height;

[0056] When the required lifting height exceeds the stroke of the single-stage lifting cylinder 13, so that the second-stage telescopic column 12 needs to be extended, the single-stage lifting cylinder 13 first lifts the first section of the telescopic column 11 until the single-stage lifting cylinder 13 completes the entire stroke, and then the control module 8 controls the electric push rod movement of the first latch 15 to insert the first latch 15 into the first pin hole of the first-stage telescopic column 11. The first-stage telescopic column 11 and the second-stage telescopic column 12 are fixed in position by the two first latches 15. Then the single-stage lifting cylinder 13 is retracted into place, and the control module 8 controls the electric push rod movement of the second latch 16 to insert the second latch 16 into the second pin hole 19 of the single-stage lifting cylinder 13, thereby connecting the single-stage lifting cylinder 13 and the second-stage telescopic column 12. The single-stage lifting cylinder 13 is lifted, driving the second-stage telescopic column 12 to extend to reach the required lifting height;

[0057] When the second-stage telescopic column 12 is lifted and extended, the wedge clamping mechanism 23 releases the clamping of the movable wedge 25 on the second-stage telescopic column 12, allowing the second-stage telescopic column 12 to be lifted and extended smoothly; when the second-stage telescopic column 2 stops lifting, the control module 8 controls the wedge clamping mechanism 23 to work, and the wedge clamping mechanism 23 pushes the movable wedge 25 placed between the second-stage telescopic column 12 and the telescopic column sheath 10 to move downward to clamp the second-stage telescopic column 12, preventing the second-stage telescopic column 12 from sliding down, thereby improving the safety performance of the hydraulic gantry;

[0058] When it is necessary to put down the heavy object, the wedge clamping mechanism 23 first releases the movable wedge 25, the single-stage lifting cylinder 13 shrinks, driving the second-stage telescopic column 12 to shrink back into place, the control module 8 controls the electric push rod of the second latch 16 to pull out the second latch 16, the single-stage lifting cylinder 13 extends the stroke again to the position, the control module 8 controls the electric push rod of the first latch 15 to pull out the first latch 15, at this time the single-stage lifting cylinder 13 shrinks, driving the first-stage telescopic column 11 to shrink;

[0059] When walking is required, the control module 8 controls the walking hydraulic motor of the walking mechanism 3 to drive the active walking wheel 20 to rotate, so as to achieve forward or backward movement.

[0060] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A hydraulic gantry, comprising an even number of lifting units (1), wherein the even number of lifting units (1) are respectively divided into two groups, the two groups of lifting units (1) are respectively mounted on two combined guide rails (2), a hanging beam frame (3) is connected between the lifting units (1), and the hanging beam frame (3) is provided with a hanging device trolley (4), characterized in that: The lifting unit (1) comprises a tower base (5), the bottom of the tower base (5) is provided with a walking mechanism (6) in contact with the combined guide rail (2), the tower base (5) is provided with a hydraulic pump station (7) and a control module (8) electrically connected to the hydraulic pump station (7), the top of the tower base (5) is provided with a lifting tower (9), the lifting tower (9) comprises a telescopic column sleeve (10) connected to the top of the tower base (5), the telescopic column sleeve (10) is provided with a first-stage telescopic column (11), a second-stage telescopic column (12), and a single-stage lifting cylinder (13), the first-stage telescopic column (11) is located in the second-stage telescopic column (12), the single-stage lifting cylinder (13) is located in the first-stage telescopic column (11), and the first-stage telescopic column (11) is provided with a second-stage telescopic column (12). ) is connected to the hanging beam frame (3) at the top, the hydraulic pump station (7) is connected to the walking mechanism (6) and the single-stage lifting cylinder (13) through an oil circuit, at least one group of pin connection mechanisms (14) is provided at the top of the second-stage telescopic column (12), the pin connection mechanism (14) includes at least one first latch (15) and at least one second latch (16), the first latch (15) and the second latch (16) are both connected to a first telescopic driving member (17), the control module (8) is electrically connected to the first telescopic driving member (17), the bottom of the first-stage telescopic column (11) is provided with a first pin hole corresponding to the first latch (15), and the top of the single-stage lifting cylinder (13) is provided with a second pin hole (19) corresponding to the second latch (16); At least one set of wedge clamping mechanisms (23) is provided at the top of the telescopic column sheath (10), and the wedge clamping mechanism (23) comprises a fixed wedge (24) mounted on the inner wall of the telescopic column sheath (10), and a wedge surface is provided on a side of the fixed wedge (24) away from the telescopic column sheath (10), and a movable wedge (25) in sliding contact is provided on the wedge surface, and a first connecting rod (26) is rotatably provided on the top of the movable wedge (25), and a second connecting rod (27) is rotatably provided on the top of the first connecting rod (26), and a rotating shaft (28) is fixedly connected to the upper end of the second connecting rod (27), and the rotating shaft (28) is rotatably mounted on the top of the telescopic column sheath (10), and one end of the rotating shaft (28) is provided with a driving mechanism for driving the rotating shaft (28) to rotate so as to drive the movable wedge (25) to clamp the second-stage telescopic column (12).

2. A hydraulic gantry according to claim 1, characterized in that: The bottom of the single-stage lifting cylinder (13) is rotatably connected to the tower base (5).

3. A hydraulic gantry according to claim 1, characterized in that: The travel mechanism (6) comprises an active travel wheel (20) in contact with the combined guide rail (2), and a travel hydraulic motor connected to the active travel wheel (20), and the hydraulic pump station (7) is connected to the travel hydraulic motor via an oil circuit.

4. The hydraulic gantry according to claim 1, characterized in that: A ball head mechanism (21) is provided at the top of the first-stage telescopic column (11), and the ball head mechanism (21) is connected to the suspension beam frame (3) via a jacking turntable (22).

5. The hydraulic gantry according to claim 1, characterized in that: The number of the first latch pin (15) is one, the number of the second latch pins (16) is two, and the two second latch pins (16) are respectively located on both sides of the first latch pin (15).

6. The hydraulic gantry according to claim 1, characterized in that: The number of the pin connection mechanisms (14) is 2 groups, and the two groups of the pin connection mechanisms (14) are respectively located on two opposite sides of the top of the second-stage telescopic column (12).

7. The hydraulic gantry according to claim 1, characterized in that: A side wall of the movable wedge block (25) away from the fixed wedge block (24) is provided with an anti-slip structure (29).

8. The hydraulic gantry according to claim 1, characterized in that: The driving mechanism comprises a second telescopic driving member (30), the protruding end of the second telescopic driving member (30) is rotatably connected to a connecting sleeve (31), a limiting shaft (32) and a spring (33) sleeved on the periphery of the limiting shaft (32) are arranged in the connecting sleeve (31), a baffle (34) is arranged at one end of the rotating shaft (28), a limiting groove (35) is arranged at one end of the baffle (34), the width or length of the limiting groove (35) is greater than the size of the cross section of the limiting shaft (32), and the limiting shaft (32) passes through the limiting groove (35) and is provided with a limiting nut (36).

9. The hydraulic gantry according to claim 1, characterized in that: It also includes a detection sensor (37) for detecting that the movable wedge (25) has moved into position.

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