A hydraulic gantry capable of preventing sliding and falling

Abstract

The present invention discloses a hydraulic gantry that can prevent sliding down and falling, belongs to the technical field of gantry, and solves the technical problem that the hydraulic oil in the hydraulic chamber of the balance valve may leak, and the load may have the risk of sliding down and falling. The present invention includes at least one set of wedge clamping mechanism installed on the top of the telescopic column sheath, the wedge clamping mechanism includes a fixed wedge and a movable wedge, the top of the movable wedge is rotatably provided with a first connecting rod, the top of the first connecting rod is rotatably provided with a second connecting rod, the upper end of the second connecting rod is fixedly connected with a rotating shaft, the rotating shaft is rotatably installed on the top of the telescopic column sheath, and one end of the rotating shaft is provided with a driving mechanism for driving the rotating shaft to rotate. The telescopic column is clamped by the movable wedge to prevent it from sliding down, so as to prevent the load from sliding down and falling. The driven wheel group is provided with an encoder, and the control module obtains the speed of each walking mechanism according to each encoder and compares it to adjust the opening degree of each proportional multi-way valve to realize the synchronous walking of the hydraulic gantry.

Description

Technical Field

[0001] The invention relates to the technical field of gantry frames, and more particularly to a hydraulic gantry frame capable of preventing sliding down and falling. Background Art

[0002] At present, when the hydraulic gantry with telescopic columns is working, the hydraulic cylinder connected to the telescopic columns is equipped with a balance valve to prevent the load from sliding down and falling. However, if the hydraulic gantry with a load needs to be stopped for a long time due to work needs, the hydraulic oil in the hydraulic chamber of the balance valve will leak, and the load will be at risk of sliding down and falling. Summary of the invention

[0003] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. The purpose of the present invention is to provide a hydraulic gantry that can prevent sliding down and falling, which can effectively prevent the load from sliding down and falling.

[0004] The technical solution of the present invention is: a hydraulic gantry capable of preventing sliding and falling, comprising at least one set of wedge clamping mechanisms installed on the top of a telescopic column sleeve, the wedge clamping mechanism comprising a fixed wedge installed on the inner wall of the telescopic column sleeve, a wedge surface provided on the side of the fixed wedge away from the telescopic column sleeve, a movable wedge in sliding contact provided on the wedge surface, a first connecting rod rotatably provided on the top of the movable wedge, a second connecting rod rotatably provided on the top of the first connecting rod, a rotating shaft fixedly connected to the upper end of the second connecting rod, the rotating shaft rotatably installed on the top of the telescopic column sleeve, and a driving mechanism for driving the rotating shaft to rotate so as to drive the movable wedge to clamp the telescopic column in the telescopic column sleeve;

[0005] A walking mechanism is provided at the bottom of the telescopic column sheath, and a hydraulic pump station, a proportional multi-way valve, and a synchronous diverter valve are arranged in the walking mechanism, wherein a control module is arranged in one of the walking mechanisms, and at least two groups of driving wheel groups arranged side by side are arranged on one side of the bottom of the walking mechanism, and at least two groups of driven wheel groups arranged side by side are arranged on the other side, the driving wheel group includes a driving walking wheel and a walking hydraulic motor connected to the driving walking wheel, and the driven wheel groups are connected by a coupling, and one group of the driven wheel groups is provided with an encoder, and the control module is electrically connected to the hydraulic pump station, the proportional multi-way valve, the encoder, and the driving mechanism, and the hydraulic pump station is connected to the walking hydraulic motor via the proportional multi-way valve and the synchronous diverter valve in turn.

[0006] As a further improvement, a side wall of the movable wedge away from the fixed wedge is provided with an anti-slip structure.

[0007] Furthermore, the anti-slip structure is anti-slip teeth.

[0008] Furthermore, the rotating shaft is rotatably mounted on the top of the telescopic column sleeve through a bearing seat.

[0009] Furthermore, the number of the fixed wedges and the movable wedges is two groups, and the two groups of the fixed wedges and the movable wedges are respectively installed on both sides of the inner wall of the telescopic column sleeve; the number of the bearing seats is 4, which are evenly divided into two groups; each group of the fixed wedges and the movable wedges is installed between the two bearing seats of the same group.

[0010] Further, the driving mechanism includes a linear telescopic unit, the protruding end of the linear telescopic unit is rotatably connected to a connecting sleeve, a limiting shaft and a spring sleeved on the 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 cross-sectional size of the limiting shaft, the limiting shaft passes through the limiting groove and is provided with a limiting nut.

[0011] Furthermore, the linear telescopic unit is any one of an electric push rod, a pneumatic cylinder, and an oil cylinder.

[0012] Furthermore, the driving mechanism is any one of an electric motor, a pneumatic motor, and a hydraulic motor.

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

[0014] Furthermore, the hydraulic gantry capable of preventing sliding down and falling comprises two sets of the wedge clamping mechanisms, and the two sets of the wedge clamping mechanisms are installed on two opposite sides of the top of the telescopic column sheath.

[0015] Beneficial Effects

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] When the telescopic column of the hydraulic gantry of the present invention is working, the electric push rod is not energized, the push rod is retracted, the spring on the connecting sleeve is driven to be in a natural state, the movable wedge is in a relaxed state, the friction between the telescopic column and the movable wedge is very small, and the normal telescopic column is not affected;

[0018] When the telescopic column stops working, the electric push rod is energized first, and the push rod is extended (after the push rod is extended into place, the electric push rod can be powered off to keep the push rod in the extended state), driving the spring on the connecting sleeve to be in a compressed state. The spring is compressed, and the spring compression force directly acts on the baffle of the rotating shaft, pushing the baffle to rotate, thereby driving the movable wedge to move downward. The surface of the movable wedge is processed with fine teeth, which can bite and embed into the surface of the telescopic column in contact with it, thereby generating sufficiently large friction resistance to prevent the telescopic column from sliding down. The telescopic column belongs to the load mechanism and is a part of the load mechanism. When the telescopic column does not slide down, the load mechanism does not slide down either, thereby preventing the load from sliding down and falling.

[0019] The control method of the present invention is simple and has obvious effect, and effectively solves the problem that when the hydraulic gantry needs to stop jacking for a long time with a load in the middle, the hydraulic oil in the hydraulic chamber of the balance valve will leak, and the load will have the risk of sliding down and falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the hydraulic gantry with two traveling mechanisms;

[0021] Figure 2 It is a schematic diagram of the overall structure of the hydraulic gantry with 4 traveling mechanisms;

[0022] Figure 3 It is a schematic diagram of the structure of the wedge clamping mechanism of the present invention installed on the hydraulic gantry;

[0023] Figure 4 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;

[0024] Figure 5 It is a schematic diagram of the main structure of the wedge clamping mechanism of the present invention installed on the telescopic column sheath;

[0025] Figure 6 It is a front sectional view of the wedge clamping mechanism of the present invention installed on the telescopic column sheath;

[0026] Figure 7 It is a schematic diagram of the top view of the wedge clamping mechanism of the present invention installed on the telescopic column sheath;

[0027] Figure 8 It is a three-dimensional structural schematic diagram of the wedge clamping mechanism in the present invention;

[0028] Fig. 9 for Figure 3 The enlarged view of point A in the middle;

[0029] Fig.10 for Fig. 9 The enlarged view of point B in the middle;

[0030] Fig.11 It is a three-dimensional structural schematic diagram of the walking mechanism in the present invention;

[0031] Fig.12 It is a schematic diagram of the installation structure of the coupling and the encoder in the present invention.

[0032] Among them: 1- telescopic column sleeve, 2- wedge clamping mechanism, 3- fixed wedge, 4- movable wedge, 5- first connecting rod, 6- second connecting rod, 7- rotating shaft, 8- telescopic column, 9- anti-slip structure, 10- bearing seat, 11- linear telescopic unit, 12- connecting sleeve, 13- limiting shaft, 14- spring, 15- baffle, 16- limiting groove, 17- detection sensor, 18- induction sheet, 19- mounting frame, 20- line Walking mechanism, 21-installing groove, 22-sleeve, 23-limiting nut, 24-pin shaft, 25-combined guide rail, 26-hanging beam, 27-hanging device trolley, 28-control module, 29-hydraulic pump station, 30-proportional multi-way valve, 31-synchronous diverter valve, 32-driving wheel group, 33-driven wheel group, 34-driving walking wheel, 35-walking hydraulic motor, 36-coupling, 37-encoder, 38-driven walking wheel. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0034] See also Figures 1 to 12 A hydraulic gantry that can prevent sliding down and falling, a hydraulic gantry that can prevent sliding down and falling such as Figure 1 There are two walking mechanisms 20, or as shown Figure 2 As shown, there are four walking mechanisms 20, the telescopic column 8 and the lifting cylinder are installed in the telescopic column sheath 1, the top of the walking mechanism 20 is connected to the bottom of the telescopic column sheath 1 to form a lifting component, the telescopic column 8 is driven to extend and retract by the lifting cylinder, the walking mechanism 20 reciprocates on the modular guide rail 25, the top of the telescopic column 8 is connected to the lifting beam 26, and the lifting beam 26 is provided with a lifting trolley 27, and the lifting trolley 4 is used to lift the load (heavy objects).

[0035] The hydraulic gantry also includes at least one set of wedge clamping mechanism 2 installed on the top of the telescopic column sheath 1. The wedge clamping mechanism 2 includes a fixed wedge 3 installed on the inner wall of the telescopic column sheath 1, a wedge surface is provided on the side of the fixed wedge 3 away from the telescopic column sheath 1, and a movable wedge 4 in sliding contact is provided on the wedge surface, a first connecting rod 5 is rotatably provided on the top of the movable wedge 4, a second connecting rod 6 is rotatably provided on the top of the first connecting rod 5, a rotating shaft 7 is fixedly connected to the upper end of the second connecting rod 6, the rotating shaft 7 is rotatably installed on the top of the telescopic column sheath 1, and one end of the rotating shaft 7 is provided with a driving mechanism for driving the rotating shaft 7 to rotate so as to drive the movable wedge 4 to clamp the telescopic column 8 in the telescopic column sheath 1. An installation groove 21 is provided on the inner wall of the telescopic column sheath 1, and the fixed wedge 3 is installed in the installation groove 21 by bolts.

[0036] Further, the side wall of the movable wedge block 4 away from the fixed wedge block 3 is provided with an anti-slip structure 9, that is, the side wall of the movable wedge block 4 used for clamping the telescopic column 8 is provided with an anti-slip structure 9. Preferably, the anti-slip structure 9 is an anti-slip tooth.

[0037] The rotating shaft 7 is rotatably mounted on the top of the telescopic column sleeve 1 through the bearing seat 10, that is, the rotating shaft 7 is installed in the bearing seat 10 through the bearing.

[0038] Preferably, the number of fixed wedges 3 and movable wedges 4 is two groups, and the two groups of fixed wedges 3 and movable wedges 4 are respectively installed on both sides of the inner wall of the telescopic column sheath 1, which can increase the contact area between the movable wedges 4 and the telescopic column 8 to improve the clamping stability. The number of bearing seats 10 is 4, which are evenly divided into two groups. Each group of fixed wedges 3 and movable wedges 4 is installed between two bearing seats 10 in the same group, which can reduce the deformation of the rotating shaft 7 when the movable wedge 4 clamps the telescopic column 8 to ensure the clamping force. Specifically, the upper end of the second connecting rod 6 is fixedly connected with a sleeve 22, and the sleeve 22 is located between the two bearing seats 10 in the same group. The sleeve 22 and the rotating shaft 7 are limited by a key, and the sleeve 22 and the rotating shaft 7 are interference fit.

[0039] In one embodiment, the driving mechanism includes a linear telescopic unit 11, the extended end of the linear telescopic unit 11 is rotatably connected to a connecting sleeve 12, specifically, the extended end of the linear telescopic unit 11 is rotatably connected to the connecting sleeve 12 through a pin shaft 24, a limiting shaft 13 and a spring 14 sleeved on the periphery of the limiting shaft 13 are arranged in the connecting sleeve 12, a baffle 15 is arranged at one end of the rotating shaft 7, a limiting groove 16 is arranged at one end of the baffle 15, the width or length of the limiting groove 16 is greater than the size of the cross section of the limiting shaft 13, the limiting shaft 13 passes through the limiting groove 16 and is provided with a limiting nut 23, when the limiting shaft 13 swings up and down, it will not be stuck in the limiting groove 16, and the limiting shaft 13 will not be separated from the limiting groove 16. Specifically, the limiting groove 16 is a waist-shaped hole arranged in the up and down direction.

[0040] Preferably, the linear telescopic unit 11 is any one of an electric push rod, a pneumatic cylinder, and an oil cylinder.

[0041] The working process of the wedge clamping mechanism 2 is:

[0042] When the telescopic column 8 of the hydraulic gantry is working, the electric push rod is not energized, the push rod retracts, driving the spring 14 on the connecting sleeve 12 to be in a natural state, the movable wedge 4 to be in a relaxed state, the friction between the telescopic column 8 and the movable wedge 4 is very small, and the normal extension and retraction of the telescopic column 8 is not affected.

[0043] When the telescopic column 8 of the hydraulic gantry stops working, the electric push rod is powered through the control module 28 or the switch, and the electric push rod is powered first, and the push rod is extended (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 14 on the connecting sleeve 12 to be in a compressed state. The spring 14 is compressed, and the compression force of the spring directly acts on the baffle 15 of the rotating shaft 7, pushing the baffle 15 to rotate, thereby driving the movable wedge 4 to move downward. The surface of the movable wedge 4 is processed with fine teeth, which can bite and embed into the surface of the telescopic column 8 in contact with it, generating a sufficiently large friction resistance, thereby preventing the telescopic column 8 from sliding down. The telescopic column 8 belongs to the load mechanism and is a part of the load mechanism. When the telescopic column 8 does not slide down, the load mechanism does not slide down either, thereby preventing the load from sliding down and falling. The spring 14 has the function of automatic compensation, so that the movable wedge 4 always clamps the telescopic column 8.

[0044] In another embodiment, the driving mechanism is 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.

[0045] In one embodiment, the hydraulic gantry also includes a detection sensor 17 for detecting whether the movable wedge 4 moves into position, and the detection sensor 17 transmits the detection structure to the control module 28 or the indicator light. Figure 8 , Fig. 9 As shown, the detection sensor 17 is installed on the top of the telescopic column sheath 1 through a mounting frame 19, and the mounting frame 19 is a U-shaped frame structure surrounding the outer periphery of the second connecting rod 6. The detection sensor 17 detects whether the movable wedge 4 moves to the right position by directly sensing the second connecting rod 6. Alternatively, a sensing sheet 18 is provided on the top of the movable wedge 4, and the detection sensor 17 detects whether the movable wedge 4 moves to the right position by sensing the sensing sheet 18. The detection sensor 17 is a proximity switch (Hall proximity switch or mechanical contact proximity switch) or a photoelectric sensor.

[0046] In one embodiment, as a preferred solution, the hydraulic gantry includes two sets of wedge clamping mechanisms 2, which are respectively installed on two opposite sides of the top of the telescopic column sheath 1. The telescopic column 8 is clamped at the same time by the movable wedges 4 on both sides, so that the clamping effect is better and the stability is higher.

[0047] A traveling mechanism 20 is provided at the bottom of the telescopic column sheath 1. A hydraulic pump station 29, a proportional multi-way valve 30, and a synchronous diverter valve 31 are provided in the traveling mechanism 20. A control module 28 is provided in one of the traveling mechanisms 20. The control module 28 is a PLC or a single-chip microcomputer or an industrial control computer. At least two sets of driving wheel groups 32 arranged side by side are provided on one side of the bottom of the traveling mechanism 20, and at least two sets of driven wheel groups 33 arranged side by side are provided on the other side. The driving wheel group 32 includes a driving traveling wheel 34 and a traveling hydraulic motor 35 connected to the driving traveling wheel 34. The driven wheel group 33 includes a driven traveling wheel 38, which is connected to each other by a coupling 36. One set of the driven wheel groups 33 is provided with an encoder 37, and the encoder 37 is driven to work by the rotating shaft of the driven traveling wheel 38. The driving traveling wheel 34 and the driven traveling wheel 38 are supported on the combined guide rail 25. The control module 28 is electrically connected to the hydraulic pump station 29 , the proportional multi-way valve 30 , the encoder 37 , and the drive mechanism. The hydraulic pump station 29 is connected to the travel hydraulic motor 35 via the proportional multi-way valve 30 and the synchronous diverter valve 31 in sequence.

[0048] Preferably, there are two driving wheel sets 32 and two driven wheel sets 33.

[0049] The control process of synchronous walking of the walking mechanism 20:

[0050] The control module 28 controls the hydraulic pump station 29 of each traveling mechanism 20 to work, and the hydraulic oil of each hydraulic pump station 29 passes through the proportional multi-way valve 30 and the synchronous diverter valve 31 in sequence to supply the traveling hydraulic motor 35 with a consistent flow rate, that is, the rotation speed of the traveling hydraulic motor 35 of the same traveling mechanism 20 is consistent;

[0051] The control module 28 obtains the speed of each walking mechanism 20 according to each encoder 37 and compares them, adjusts the opening degree of each proportional multi-way valve 30 according to the speed of each walking mechanism 20, and then adjusts the speed of the walking hydraulic motor 35 to make the speed of each walking mechanism 20 consistent, so as to achieve synchronous walking of the hydraulic gantry. It is ensured that the walking synchronization between each walking mechanism 20 meets the precision requirements, so that the walking synchronization performance of the hydraulic gantry is greatly improved, and it can walk continuously and stably, which greatly improves the working efficiency of the hydraulic gantry.

[0052] The driven wheel groups are connected together with a coupling, which ensures that even if one of the driven wheel groups is free during travel, it can still rotate with the driving wheel group, ensuring the output signal to the encoder. Since the driven wheel group is dragged by the driving wheel group, the driven wheel group will not have the problem of slipping or too fast rotation speed, ensuring that the encoder output signal is the real speed signal of the walking mechanism 20.

[0053] A wire displacement sensor is provided at the top of the telescopic column 8 to monitor the lifting data and feed it back to the control module 28. The control module 28 obtains the lifting data of each telescopic column 8 and compares them. The control module 28 controls the opening of the proportional valve of each single-stage lifting cylinder 13 according to the comparison result to realize the synchronous lifting of the hydraulic gantry.

[0054] Construction method:

[0055] Step 1. Install the modular guide rail 25 at the designated construction location;

[0056] Step 2. Install the lifting components on the modular guide rail 25;

[0057] Step 3. Start the control module 28, which controls the hydraulic pump station 29, the proportional multi-way valves 30, the proportional valves of the single-stage lifting cylinders 13, and the wedge clamping mechanisms 2 to operate, so as to make the traveling mechanism 20, the single-stage lifting cylinders 13, and the wedge clamping mechanism 2 run for trial, and check whether the oil supply pressure of the hydraulic pump station 29, the proportional multi-way valves 30, the proportional valves, the encoder 37, the wire displacement sensor, the drive mechanism of the wedge clamping mechanism 2, and the detection sensor 17 are normal. If all are normal, proceed to step 4;

[0058] Step 4. Install the hanging beam 26 on the top of the telescopic column 8 of the lifting component, and install the hanging device trolley 27 on the hanging beam 26;

[0059] Step 5. The control module 28 controls each walking mechanism 20 to move synchronously so that the hydraulic gantry moves to the top of the object to be hoisted; Step 6. Connect the hoisting trolley 27 to the object to be hoisted with a hoisting rope;

[0060] Step 7. The control module 28 controls each single-stage lifting cylinder 13 to synchronously lift to a set lifting force;

[0061] Step 8. Check the posture of the object to be hoisted and the stress state of the hoisting rope. If there is no problem, proceed to step 9;

[0062] Step 9. The control module 28 controls each single-stage lifting cylinder 13 to synchronously lift to a set height at a set lifting speed, and the control module 28 controls the wedge clamping mechanism 2 to clamp the telescopic column 8;

[0063] Step 10. The control module 28 controls each walking mechanism 20 to move synchronously to the installation position of the object to be hoisted at a set moving speed;

[0064] Step 11. The control module 28 controls the wedge clamping mechanism 2 to release the telescopic column 8, and the control module 28 controls each single-stage lifting cylinder 13 to synchronously descend to a specified height at a set descending speed;

[0065] Step 12. After checking the installation posture of the object to be hoisted, the control module 28 controls each single-stage lifting cylinder 13 to descend synchronously at the installation descending speed to install the object to be hoisted at the installation position;

[0066] Step 13: Remove the lifting ropes, and the control module 28 controls the walking mechanisms 20 to move synchronously to move the hydraulic gantry to the initial position (i.e., the installation position), and remove the lifting components and the modular guide rails 25.

[0067] 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 that can prevent sliding and falling, characterized in that: The invention comprises at least one set of wedge clamping mechanism (2) installed on the top of the telescopic column sleeve (1), the wedge clamping mechanism (2) comprises a fixed wedge (3) installed on the inner wall of the telescopic column sleeve (1), the fixed wedge (3) is provided with a wedge surface on the side away from the telescopic column sleeve (1), the wedge surface is provided with a movable wedge (4) in sliding contact, the top of the movable wedge (4) is rotatably provided with a first connecting rod (5), the top of the first connecting rod (5) is rotatably provided with a second connecting rod (6), the upper end of the second connecting rod (6) is fixedly connected with a rotating shaft (7), the rotating shaft (7) is rotatably installed on the top of the telescopic column sleeve (1), and one end of the rotating shaft (7) is provided with a driving mechanism for driving the rotating shaft (7) to rotate so as to drive the movable wedge (4) to clamp the telescopic column (8) in the telescopic column sleeve (1); A walking mechanism (20) is provided at the bottom of the telescopic column sheath (1), wherein a hydraulic pump station (29), a proportional multi-way valve (30), and a synchronous diverter valve (31) are provided in the walking mechanism (20), wherein a control module (28) is provided in one of the walking mechanisms (20), and at least two sets of driving wheel groups (32) arranged side by side are provided on one side of the bottom of the walking mechanism (20), and at least two sets of driven wheel groups (33) arranged side by side are provided on the other side, wherein the driving wheel group (32) includes a driving walking wheel (34). , a travel hydraulic motor (35) connected to the active travel wheel (34), the driven wheel groups (33) are connected via a coupling (36), one set of the driven wheel groups (33) is provided with an encoder (37), the control module (28) is electrically connected to the hydraulic pump station (29), the proportional multi-way valve (30), the encoder (37), and the drive mechanism, and the hydraulic pump station (29) is connected to the travel hydraulic motor (35) in turn via the proportional multi-way valve (30) and the synchronous diverter valve (31).

2. A hydraulic gantry capable of preventing sliding down and falling according to claim 1, characterized in that: The side wall of the movable wedge block (4) away from the fixed wedge block (3) is provided with an anti-slip structure (9).

3. A hydraulic gantry capable of preventing sliding down and falling according to claim 2, characterized in that: The anti-skid structure (9) is an anti-skid tooth.

4. The hydraulic gantry capable of preventing sliding down and falling according to claim 1, characterized in that: The rotating shaft (7) is rotatably mounted on the top of the telescopic column sleeve (1) via a bearing seat (10).

5. The hydraulic gantry capable of preventing sliding down and falling according to claim 4, characterized in that: The number of the fixed wedge blocks (3) and the movable wedge blocks (4) is two groups, and the two groups of the fixed wedge blocks (3) and the movable wedge blocks (4) are respectively installed on both sides of the inner wall of the telescopic column sleeve (1); the number of the bearing seats (10) is four, which are evenly divided into two groups; each group of the fixed wedge blocks (3) and the movable wedge blocks (4) is installed between the two bearing seats (10) of the same group.

6. The hydraulic gantry capable of preventing sliding down and falling according to claim 1, characterized in that: The driving mechanism comprises a linear telescopic unit (11), the protruding end of the linear telescopic unit (11) is rotatably connected to a connecting sleeve (12), a limiting shaft (13) and a spring (14) sleeved on the periphery of the limiting shaft (13) are arranged in the connecting sleeve (12), a baffle (15) is arranged at one end of the rotating shaft (7), a limiting groove (16) is arranged at one end of the baffle (15), the width or length of the limiting groove (16) is greater than the size of the cross section of the limiting shaft (13), and the limiting shaft (13) passes through the limiting groove (16) and is provided with a limiting nut (23).

7. The hydraulic gantry capable of preventing sliding down and falling according to claim 6, characterized in that: The linear telescopic unit (11) is any one of an electric push rod, an air cylinder, and an oil cylinder.

8. The hydraulic gantry capable of preventing sliding down and falling according to claim 1, characterized in that: The driving mechanism is any one of an electric motor, a pneumatic motor and a hydraulic motor.

9. The hydraulic gantry capable of preventing sliding down and falling according to claim 1, characterized in that: It also includes a detection sensor (17) for detecting that the movable wedge (4) has moved into position.

10. A hydraulic gantry capable of preventing sliding down and falling according to any one of claims 1 to 9, characterized in that: The hydraulic gantry capable of preventing sliding down and falling comprises two sets of the wedge clamping mechanisms (2), and the two sets of the wedge clamping mechanisms (2) are installed on two opposite sides of the top of the telescopic column sheath (1).

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