Steel pipe pile casing positioning support

Abstract

The utility model provides a steel pipe pile casing positioning bracket which comprises two groups of rectangular mounting racks which are symmetrically arranged up and down, connecting rods which are vertically connected between four corners of the two groups of mounting racks, and four groups of guide wheel components which are respectively arranged in the middle of four sides of the mounting racks and are arranged with the end parts facing the centers of the mounting racks, the adjusting assemblies are arranged in the mounting frames and used for adjusting the distance between the ends of the guide wheel assemblies and the centers of the mounting frames, the driving mechanism is arranged between the two mounting frames and used for driving the adjusting assemblies in the two mounting frames at the same time, and the connecting piece is arranged on the connecting rod. According to the positioning support, shaking of the pile casing in the inserting and driving process can be effectively reduced, the steel pipe pile pile casing can be more accurately positioned, the position of the guide wheel assembly can be flexibly adjusted through the synergistic effect of the driving mechanism and the adjusting assembly, the pile casings with different diameters can be positioned, the universality of the positioning support is improved, and the positioning support is suitable for popularization and application. And the structural stability and the positioning precision of the bracket are further guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the steel trestle construction technical field, concretely relates to a steel pipe pile casing positioning support. BACKGROUND

[0002] In the water bridge construction, the steel trestle is a kind of temporary construction structure, it can conveniently transport and stack construction equipment, material, and simultaneously provides safe and reliable working space for construction personnel, plays a vital role in the whole bridge construction process;In the steel trestle construction process, steel pipe pile insertion is a key step, and the stability of steel pipe pile as the foundation support structure of steel trestle directly determines the bearing capacity and stability of steel trestle. However, when steel pipe pile insertion encounters large particle size pebble layer, due to the large particle size pebble large strength, smooth surface, it will cause the problems such as steel pipe pile inclination, bottom damage, unable to position and insufficient filling depth, which not only causes the construction difficulty of steel trestle, but also seriously affects the overall structural stability of steel trestle.

[0003] In order to solve the problem, the prior art usually adopts the method of setting the casing, and the steel casing is inserted into the appropriate position during construction, the rotary drilling head is operated in the casing, the large particle size pebble is effectively grabbed, and the original stratum is loosened, the resistance when the steel pipe pile is inserted is greatly reduced, so that the steel pipe pile can sink smoothly in the treated stratum, and the casing can also ensure that the surrounding pebble layer does not collapse due to loosening, and the stability of the stratum in the construction area is maintained.

[0004] At present, during the process of steel casing insertion, the steel casing needs to be positioned and guided by installing the frame, if the steel casing is not positioned accurately, the steel pipe pile may not be accurately guided to insert, so that the steel pipe pile deviates from the design position, and the overall structural precision of the steel trestle is affected;The existing installing frame is usually composed of a rectangular outer frame and an arc-shaped guide plate (matching with the outer circumference of the casing, leaving a gap of 5-10mm) or a guide sleeve (the inner diameter is slightly larger than the outer diameter of the casing) arranged in the outer frame, and the arc-shaped guide plate and the guide sleeve can guide the insertion direction of the casing. But the traditional installing frame still has some problems in the use process: 1. there is a gap between the arc-shaped guide plate or the guide sleeve and the casing, which can cause the casing to shake and be not positioned accurately during insertion;2. the installing frame is designed for a specific diameter of casing, when different diameter casings are encountered, the installing frame needs to be modified or replaced, which is time-consuming and laborious and may affect the structural stability and positioning accuracy. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a steel pipe pile casing positioning support, and solves the problems in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0007] A steel pipe pile casing positioning support, comprising two sets of rectangular mounting frames arranged symmetrically up and down, connecting rods connected vertically between four corners of the two sets of mounting frames, four sets of guide wheel assemblies arranged respectively in the middle and end of four sides of the mounting frames and towards the center of the mounting frames, adjusting assemblies arranged in the mounting frames for adjusting the distance between the end of the guide wheel assemblies and the center of the mounting frames, a driving mechanism arranged between the two sets of mounting frames for simultaneously driving the adjusting assemblies in the two sets of mounting frames, and a connecting piece arranged on the connecting rod.

[0008] Preferably, the mounting frame comprises two mutually parallel hollow horizontal rods, two hollow vertical rods connected between the two horizontal rods, and two hollow mounting boxes arranged respectively in the middle of the horizontal rods and the vertical rods, the horizontal rods and the vertical rods enclosing a rectangle, the mounting boxes being in communication with the interiors of the horizontal rods and the vertical rods, and the guide wheel assemblies being arranged in the mounting boxes.

[0009] Preferably, the adjusting assembly comprises a driving worm rotatably connected in any of the horizontal rods and connected at one end with the driving mechanism, a transverse worm rotatably connected at both ends in the other horizontal rod, a transverse bevel gear fixedly connected at the other end of the driving worm and at both ends of the transverse worm, a longitudinal bevel gear perpendicularly engaged with the transverse bevel gear, a longitudinal worm rotatably penetrating the side wall of the vertical rod and the side wall of the horizontal rod at the end and fixedly connected with the longitudinal bevel gear in the vertical rod, and an adjusting worm wheel arranged on the guide wheel assembly and engaged with the driving worm, the transverse worm and the longitudinal worm.

[0010] Preferably, the guide wheel assembly comprises a telescopic piece arranged in the mounting box and having a telescopic end towards the center of the mounting frame, a U-shaped frame connected at the end of the telescopic end of the telescopic piece, and a guide wheel rotatably arranged on the U-shaped frame, and the adjusting worm wheel is arranged on the telescopic piece.

[0011] Preferably, the telescopic piece comprises a sleeve rotatably connected at one end to the inner side wall of the mounting box, a threaded rod fixedly connected at one end to the U-shaped frame and at the other end to the inside of the sleeve, a guide cylinder fixedly connected at one end to the inner side wall of the mounting box, and a guide rod fixedly connected at one end to the U-shaped frame and at the other end slidingly connected in the guide cylinder, and the adjusting worm wheel is fixedly sleeved on the sleeve.

[0012] Preferably, the driving mechanism comprises: a driving worm wheel fixedly sleeved on the end of the driving worm, a driving worm engaged with the two driving worm wheels, and a power member driving the driving worm to rotate, the upper end of the driving worm rotating through the lower side wall and the upper side wall of the upper mounting frame transversal rod in sequence, and the lower end rotating through the upper side wall of the lower mounting frame transversal rod.

[0013] Preferably, the connecting rod is internally hollow, the driving worm is located in the connecting rod, and the two ends of the driving worm rotate through the upper and lower side walls of the connecting rod.

[0014] Preferably, the connecting rod is rectangular, the connecting member is connected to the side wall of the connecting rod facing the outer side, the connecting member comprises a vertical plate detachably connected to the side wall of the connecting rod, and a horizontal plate vertically connected to the bottom end of the vertical plate, and mounting holes are arranged through the vertical plate and the horizontal plate.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] The utility model discloses a positioning support for steel pipe pile casing, which comprises a mounting frame, a guiding wheel assembly arranged on the mounting frame, and an adjusting assembly arranged on the guiding wheel assembly, wherein the mounting frame comprises a horizontal transversal rod and a vertical transversal rod, the horizontal transversal rod is provided with a lower side wall and an upper side wall, the vertical transversal rod is provided with a left side wall and a right side wall, the left side wall and the right side wall are connected to the upper side wall and the lower side wall, respectively, the guiding wheel assembly is arranged on the upper side wall and the lower side wall of the horizontal transversal rod, and the adjusting assembly is arranged on the left side wall and the right side wall of the vertical transversal rod.

[0017] The utility model discloses a positioning support for steel pipe pile casing, which comprises a mounting frame, a guiding wheel assembly arranged on the mounting frame, and an adjusting assembly arranged on the guiding wheel assembly, wherein the mounting frame comprises a horizontal transversal rod and a vertical transversal rod, the horizontal transversal rod is provided with a lower side wall and an upper side wall, the vertical transversal rod is provided with a left side wall and a right side wall, the left side wall and the right side wall are connected to the upper side wall and the lower side wall, respectively, the guiding wheel assembly is arranged on the upper side wall and the lower side wall of the horizontal transversal rod, and the adjusting assembly is arranged on the left side wall and the right side wall of the vertical transversal rod.

[0018] The utility model discloses a positioning support for steel pipe pile casing, which comprises a mounting frame, a guiding wheel assembly arranged on the mounting frame, and an adjusting assembly arranged on the guiding wheel assembly, wherein the mounting frame comprises a horizontal transversal rod and a vertical transversal rod, the horizontal transversal rod is provided with a lower side wall and an upper side wall, the vertical transversal rod is provided with a left side wall and a right side wall, the left side wall and the right side wall are connected to the upper side wall and the lower side wall, respectively, the guiding wheel assembly is arranged on the upper side wall and the lower side wall of the horizontal transversal rod, and the adjusting assembly is arranged on the left side wall and the right side wall of the vertical transversal rod. ACCOMPANYING DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained without creative labor on the basis of the drawings.

[0020] Figure 1 It is a structural schematic view of a steel pipe pile casing positioning support;

[0021] Figure 2 It is a structural schematic view of a steel pipe pile casing positioning support;

[0022] Figure 3 It is a structural schematic view of a steel pipe pile casing positioning support guide wheel assembly;

[0023] The drawings show: 1-mounting frame, 2-connecting rod, 3-guide wheel assembly, 4-adjustment assembly, 5-driving mechanism, 6-connector, 7-cross bar, 8-longitudinal rod, 9-mounting box, 10-driving worm, 11-longitudinal worm, 12-transverse worm, 13-transverse bevel gear, 14-longitudinal bevel gear, 15-adjustment worm wheel, 16-U-shaped frame, 17-guide wheel, 18-sleeve, 19-threaded rod, 20-guide cylinder, 21-guide rod, 22-driving worm wheel, 23-driving worm, 24-power element, 25-cross plate, 26-vertical plate, 27-mounting hole. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0025] It should be noted that: similar labels and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] In the description of the utility model, it needs to be explained that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, it is only for the convenience of describing the utility model and simplifying the description, and it is not intended to indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0027] In addition, if the terms "first", "second", "third" and the like are used only to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, if the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0029] In the description of the utility model, it also needs to be explained that, unless otherwise specified and limited, if the terms "set", "install", "connect", "connect" and the like are broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] It needs to be explained that the features in the embodiments of the utility model can be combined with each other without conflict.

[0031] As shown in Figure 1 - Figure 2 A steel pipe pile casing positioning support, comprising two groups of mounting racks 1 arranged symmetrically up and down in a rectangular shape, connecting rods 2 connected vertically between the four corners of the two groups of mounting racks 1, four groups of guide wheel assemblies 3 arranged in the middle of the four sides of the mounting rack 1, the end of the mounting rack 1 towards the center of the mounting rack 1, adjusting assembly 4 arranged in the mounting rack, for adjusting the distance between the end of the guide wheel assembly 3 and the center of the mounting rack, drive mechanism 5 arranged between the two groups of mounting racks, for simultaneously driving the adjusting assembly 4 in the two groups of mounting racks 1, and connecting piece 6 arranged on the connecting rod 2.

[0032] The positioning support is connected with the support structure of the floating platform through the connecting piece 6 on the connecting rod 2 in use, and the distance between the end of the guide wheel assembly 3 and the center of the mounting frame is adjusted according to the size of the casing to be slightly larger than half of the outer diameter of the casing, so that the steel casing can be smoothly inserted into the positioning support. The steel casing is hoisted by the external hoisting equipment and placed in the positioning support, and the driving mechanism 5 drives the adjusting assembly 4 in the two mounting frames 1, and then the adjusting assembly 4 retracts the guide wheel assembly 3 inward, so that the end of the guide wheel assembly 3 can closely fit the outer wall of the casing, thereby providing stable guidance and positioning for the casing. During the driving of the casing, the casing is in close contact with the guide wheel assembly 3, and the position of the casing is corrected in real time to prevent the casing from tilting or shaking, and ensure that the casing can be accurately inserted into the specified position according to the designed direction and position. At the same time, the overall structure of the positioning support is stable, and the upper and lower symmetrical mounting frames 1 and the connecting rod 2 can withstand the reaction force during the driving of the casing, ensuring the continuous and effective positioning function and laying a foundation for the smooth driving of the subsequent steel pipe pile.

[0033] The two groups of upper and lower symmetrical mounting frames 1 and the connecting rod 2 vertically connected at the four corners constitute a double-layer structure of the mounting frame, effectively improving the stability of the overall structure of the positioning support, enabling it to better resist the influence of various external forces on the steel casing, and maintaining the accuracy of the positioning of the steel casing during the driving process. The double-layer structure also realizes the positioning and guidance of the steel casing in three-dimensional space, thereby improving the positioning accuracy of the steel casing.

[0034] The connecting rod 2 is in the form of a rectangle, the connecting piece 6 is connected to the side wall of the connecting rod 2 facing the outside, the connecting piece 6 includes a vertical plate 26 detachably connected to the side wall of the connecting rod 2, and a horizontal plate 25 vertically connected to the bottom end of the vertical plate 26, and mounting holes 27 are provided through the horizontal plate 25 and the vertical plate 26. The connecting piece 6 facilitates the connection of the positioning support with the floating platform, and adjacent positioning supports are connected through the horizontal plate 25 and the connecting piece 6, so that the construction personnel can stand on them to observe the construction situation.

[0035] The mounting frame 1 includes two mutually parallel and internally hollow horizontal rods 7, two internally hollow vertical rods 8 connected between the two horizontal rods 7, and two internally hollow mounting boxes 9 arranged at the middle portions of the horizontal rods 7 and the vertical rods 8, respectively. The horizontal rods 7 and the vertical rods 8 form a rectangle, the mounting boxes 9 are in communication with the interiors of the horizontal rods 7 and the vertical rods 8, and the guide wheel assembly 3 is arranged in the mounting boxes 9.

[0036] As Figure 2As shown, the adjusting assembly comprises: a driving worm 10 rotatably connected in any of the horizontal rods 7 and connected with the driving mechanism 5 at one end, a horizontal worm 12 rotatably connected at both ends in the other horizontal rod 7, horizontal bevel gears 13 fixedly connected at both ends of the driving worm 10 at the other end and the horizontal worm 12 respectively, a vertical bevel gear 14 vertically engaged with the horizontal bevel gears 13, a vertical worm 11 located in the vertical rod 8, rotatably penetrating the side wall of the vertical rod 8 and the side wall of the horizontal rod 7 and fixedly connected with the vertical bevel gear 14 at the end, and an adjusting worm 15 arranged on the guide wheel assembly 3 and engaged with the driving worm 10, the horizontal worm 12 and the vertical worm 11 respectively.

[0037] The working principle of the adjusting assembly is as follows: the driving mechanism drives the driving worm 10 to rotate, the rotation of the driving worm 10 drives the horizontal bevel gears 13 on it to rotate, which in turn drives the vertical bevel gear 14 vertically engaged with the horizontal bevel gears 13 to rotate, the vertical bevel gear 14 transmits the rotation to the vertical worm 11, and the vertical bevel gear 14 on the other end drives the horizontal bevel gear 13 engaged with it to rotate, which in turn drives the horizontal worm 12 to rotate, the rotation of the horizontal worm 12 is transmitted to the other vertical worm 11 through the vertical bevel gear 14, so that the worms arranged in the four sides of the mounting frame 1 rotate synchronously, and finally the adjusting worm 15 located on the guide wheel assembly 3 rotates synchronously, realizing the synchronous adjustment of the distance between the end of the guide wheel assembly 3 and the center of the mounting frame.

[0038] As shown in the figure, Figure 3 As shown, the guide wheel assembly 3 comprises: a telescopic part arranged in the mounting box 9 and having a telescopic end towards the center of the mounting frame, a U-shaped frame 16 connected at the end of the telescopic end of the telescopic part, and a guide wheel 17 rotatably arranged on the U-shaped frame 16, and the adjusting worm 15 is arranged on the telescopic part.

[0039] Among them, the telescopic part comprises: a sleeve 18 rotatably connected at one end with the inner side wall of the mounting box 9, a threaded rod 19 having one end movably penetrating the side wall of the mounting box 9 and fixedly connected with the U-shaped frame 16 and the other end threadedly connected in the sleeve 18, a guide cylinder 20 having one end fixedly connected with the inner side wall of the mounting box 9, and a guide rod 21 having one end movably penetrating the side wall of the mounting box 9 and fixedly connected with the U-shaped frame 16 and the other end slidingly connected in the guide cylinder 20, and the adjusting worm 15 is fixedly sleeved on the sleeve 18.

[0040] The principle of the position adjustment of the guide wheel assembly 3 is that when the longitudinal worm 11, the driving worm 10 and the transverse worm 12 rotate synchronously, the adjusting worm 15 is driven to rotate, and then the sleeve 18 is driven to rotate, the threaded rod 19 is limited by the U-shaped frame, the guide rod 21 and the guide cylinder 20, and can only perform the telescopic movement along the axial direction of the sleeve 18, so that the distance between the end of the guide wheel assembly 3 and the center of the mounting frame is changed;

[0041] When the guide cylinder is inserted, the guide wheel 17 is in contact with the guide cylinder, and since the guide wheel 17 can rotate, the guide wheel 17 can roll along with the descent of the guide cylinder during the insertion and driving of the guide cylinder, so that the friction between the guide cylinder and the positioning support is reduced, the guide wheel 17 after the telescopic adjustment can closely fit the guide cylinder, the guide cylinder is provided with accurate guidance, and the inclination or shaking of the guide cylinder is prevented.

[0042] The driving mechanism 5 comprises a driving worm 23 engaged with the two driving worms 22, and a power piece 24 driving the driving worm 23 to rotate.

[0043] The working principle of the driving mechanism 5 is that when the position of the guide wheel assembly 3 needs to be adjusted, the power piece 24 drives the driving worm 23 to rotate, the driving worm 23 is engaged with the two driving worms 22 fixedly sleeved at the end of the driving worm 10, so that the driving worm 10 is driven to rotate, one end of the driving worm 10 is rotationally connected in the crossbar 7, and the rotation can transmit the power to the whole adjusting assembly, the driving mechanism 5 realizes the synchronous adjustment of the guide wheel assemblies 3 on the two mounting frames 1, the steel guide cylinder is subjected to uniform positioning force in each direction, the center of the guide cylinder and the center of the mounting frame are kept in line, the perpendicularity and the horizontal position precision of the guide cylinder are further ensured, the operation is simple, and the positioning efficiency of the steel guide cylinder in construction is improved.

[0044] It should be noted that the power piece 24 can be a manually rotatable handle, or a motor commonly used in the prior art.

[0045] The driving worm 23 is located in the connecting rod 2, and the two ends of the driving worm 23 rotationally penetrate the upper and lower side walls of the connecting rod 2.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit the present application. Although the present application has been described by referring to the preferred embodiments of the present application, those skilled in the art should understand that various changes can be made in form and details without departing from the spirit and scope of the present application defined in the appended claims.

Claims

1. A steel pipe pile casing positioning support, characterized by: The application relates to a kind of installation frames, which comprises two sets of installation frames (1) arranged symmetrically up and down, a connecting rod (2) vertically connected between the four corners of the two sets of installation frames (1), four sets of guide wheel assemblies (3) arranged in the middle of the four sides of the installation frame (1) and towards the center of the installation frame (1), an adjusting assembly (4) arranged in the installation frame for adjusting the distance between the end of the guide wheel assembly (3) and the center of the installation frame, a driving mechanism (5) arranged between the two sets of installation frames for simultaneously driving the adjusting assembly (4) in the two sets of installation frames (1), and a connecting piece (6) arranged on the connecting rod (2).

2. The steel pipe pile casing positioning support according to claim 1, characterized in that: The installation frame (1) comprises two hollow horizontal rods (7) arranged parallel to each other, two hollow vertical rods (8) connected between the two horizontal rods (7), and installation boxes (9) arranged in the middle of the horizontal rods (7) and the vertical rods (8) and hollowed.

3. The steel pipe pile casing positioning support according to claim 2, characterized in that: The adjusting assembly comprises a driving worm (10) rotatably connected in any of the horizontal rods (7) and connected to the driving mechanism (5) at one end, a horizontal worm (12) rotatably connected at both ends in the other horizontal rod (7), horizontal bevel gears (13) fixedly connected at both ends of the driving worm (10) and the horizontal worm (12), a vertical bevel gear (14) vertically engaged with the horizontal bevel gears (13), a vertical worm (11) rotatably penetrating the side wall of the vertical rod (8) and the side wall of the horizontal rod (7) and fixedly connected to the vertical bevel gear (14) at the end, and an adjusting worm (15) arranged on the guide wheel assembly (3) and engaged with the driving worm (10), the horizontal worm (12) and the vertical worm (11).

4. The steel pipe pile casing positioning support according to claim 3, characterized in that: The guide wheel assembly (3) comprises a telescopic piece arranged in the installation box (9) and having a telescopic end towards the center of the installation frame, a U-shaped frame (16) connected to the end of the telescopic end of the telescopic piece, and a guide wheel (17) rotatably arranged on the U-shaped frame (16), and the adjusting worm (15) is arranged on the telescopic piece.

5. The steel pipe pile casing positioning support according to claim 4, characterized in that: The telescopic piece comprises a sleeve (18) rotatably connected at one end to the inner side wall of the installation box (9), a threaded rod (19) fixedly connected at one end to the U-shaped frame (16) and threadedly connected at the other end to the sleeve (18), a guide cylinder (20) fixedly connected at one end to the inner side wall of the installation box (9), and a guide rod (21) fixedly connected at one end to the U-shaped frame (16) and slidably connected at the other end to the guide cylinder (20), and the adjusting worm (15) is fixedly sleeved on the sleeve (18).

6. The steel pipe pile casing positioning support according to claim 3, characterized in that: The driving mechanism (5) comprises driving worm gears (22) fixedly sleeving the end of the driving worm (10), driving worm gears (23) meshing with the two driving worm gears (22), and a power member (24) driving the rotation of the driving worm gears (23), the upper end of the driving worm gears (22) rotatingly penetrating the lower side wall and the upper side wall of the horizontal rod (7) of the upper mounting frame (1) in sequence, and the lower end rotatingly penetrating the upper side wall of the horizontal rod (7) of the lower mounting frame (1).

7. The steel pipe pile casing positioning support according to claim 6, characterized in that: The connecting rod (2) is internally hollow, the driving worm gears (23) are located in the connecting rod (2), and the two ends of the driving worm gears (23) rotate to penetrate the upper and lower side walls of the connecting rod (2).

8. The steel pipe pile casing positioning support according to claim 4, characterized in that: The connecting rod (2) is rectangular, the connecting member (6) is connected to the side wall of the connecting rod (2) facing the outside, the connecting member (6) comprises a vertical plate (26) detachably connected to the side wall of the connecting rod (2), and a horizontal plate (25) vertically connected to the bottom end of the vertical plate (26), and mounting holes (27) are provided on the vertical plate (26) and the horizontal plate (25) and penetrate the same.

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