Pile frame and auxiliary support device for its diagonal support rod

Abstract

A diagonal support rod auxiliary support device and a pile frame including the diagonal support rod auxiliary support device, the diagonal support rod auxiliary support device including a support mechanism, a first end of the support mechanism is provided with a hinge connection ear for hinge connection with a column of the pile frame, and a second end of the support mechanism is provided with an openable sleeve for installation in a circumferential gap provided in advance with respect to the diagonal support rod of the pile frame, the support mechanism is provided with an extendable drive unit, and further includes a drive module for supporting and driving the second end of the support mechanism to lift and rotate around the hinge connection ear. The diagonal support rod auxiliary support device can effectively increase the rigidity and pressure resistance stability of the diagonal support rod, and prevent the pile frame from becoming unstable.

Description

[Technical Field]

[0001] This application claims priority to a Chinese patent application filed with the China Patent Office on December 16, 2021, bearing application number 202111545479.3 and entitled "Pile frame and its diagonal support rod auxiliary support device," the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the field of pile driving machines, in particular to a diagonal support rod auxiliary support device, and further to a pile frame having such a diagonal support rod auxiliary support device. [Background technology]

[0003] A pile driver consists of a pile hammer, a pile frame, and auxiliary equipment. The pile frame is a steel tower structure including a column and diagonal support rods. The columns of the pile frame are often relatively tall, generally over 30 meters. In recent years, to accommodate deeper pile driving, the column height has even reached over 60 meters. The lower end of the support is supported by the machine body, and the upper part is supported by two diagonal support rods. Because the columns are tall, the diagonal support rods are often long and usually slender, and their rigidity is low. Under certain severe working conditions, such as strong winds or sudden impacts, there is a high risk that the diagonal support rods will become unstable and break. Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide an auxiliary support device for diagonal support rods that can effectively increase the rigidity and pressure resistance stability of the diagonal support rods and prevent the pile frame from becoming unstable. Another object of the present invention is to provide a pile frame that includes the above auxiliary support device for diagonal support rods. [Means for solving the problem]

[0005] To achieve the above object, the present invention provides an auxiliary support device for a diagonal support rod, comprising: a support mechanism, a first end of which is provided with a hinge connection ear for hinge connection with a column of a pile frame; a second end of which is provided with an openable sleeve for being installed on the diagonal support rod of the pile frame with a predetermined circumferential gap; the support mechanism is provided with an extendable drive unit; and the support mechanism further comprises a drive module for supporting and driving the second end of the support mechanism to rotate up and down around the hinge connection ear.

[0006] Alternatively, the support mechanism is a scissors mechanism including two scissors support rods hinged at their middles.

[0007] Alternatively, the telescopic drive unit includes a telescopic cylinder provided at the tip of the scissors support rod and an inner rod connected to the telescopic cylinder, the tip of the inner rod is connected to the sleeve, and the pair of telescopic cylinders are installed in parallel.

[0008] Alternatively, an adjustment cylinder for adjusting the opening angle of the scissors mechanism is connected between the pair of scissors support rods.

[0009] Alternatively, the drive module is a lift cylinder whose tip is hinged below the hinge connection point of the scissor mechanism.

[0010] Alternatively, the sleeve may have multiple sets of distance sensors installed along the circumferential direction to detect the pitch between the cylindrical wall of the sleeve and the diagonal support rod, and may further include a controller connected to the distance sensors, the telescopic drive unit, and the drive module, and the controller is used to control the telescopic drive unit and the drive module according to the detection results of the distance sensors to position the sleeve and the diagonal support rod at equal gaps in the circumferential direction.

[0011] Alternatively, the sleeve includes a first half-cylinder fixedly connected to the inner rod and a second half-cylinder inverted and opened / closed to connect to the first half-cylinder, and an opening / closing cylinder is connected between the second half-cylinder and the inner rod.

[0012] Alternatively, the device may further include a control switch for connecting and controlling the controller.

[0013] The present invention further provides a pile frame, comprising: a body; a column hingedly connected to a first end of the body; a pair of diagonal support rods hingedly connected to a second end of the body to connect the column and the body at an angle; and the diagonal support rod auxiliary support device described in any one of the above, wherein one end of the drive module and a first end of the scissors mechanism are both hingedly connected to the column, and the sleeves are respectively extrapolated to correspond to the diagonal support rods.

[0014] Alternatively, the sleeve is connected to half of the diagonal support rod, and the scissors mechanism is installed perpendicular to the diagonal support rod.

[0015] In view of the above background art, the present invention provides an auxiliary support device for a diagonal support rod, which is hingedly connected to a column of a pile frame by using a hinge connection tab at a first end of the support mechanism. The support mechanism can be extended by adjusting the telescopic drive unit, and the drive module can be adjusted so that the support mechanism is perpendicular to the diagonal support rod of the pile frame. A sleeve at a second end of the support mechanism can be fitted to the diagonal support rod with an increased clearance. When the deformation of the sleeve is greater than the circumferential clearance under pressure, the support mechanism and the sleeve can restrain and support the diagonal support rod, which is equivalent to "shortening" the length of the diagonal support rod. According to Euler's formula for calculating the pressure-resistant stability of a pressure-bearing rod, the critical pressure at which the diagonal support rod becomes unstable under pressure, i.e., its rigidity, is inversely proportional to the square of the calculated length. When the sleeve is installed in the middle of the diagonal support rod, the rigidity of the upper and lower halves of the diagonal support rod divided by the sleeve is increased by four times, thereby significantly increasing the rigidity of the diagonal support rod. In addition, the telescopic drive unit and the drive module are used to adjust the sleeve and the oblique support rod so that they are installed with a circumferential gap, so as not to interfere with the normal operation of the oblique support rod. [Brief explanation of the drawings]

[0016] In order to more clearly explain the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings necessary for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention, and those skilled in the art may obtain other drawings according to the provided drawings on the premise that they do not perform any work that amounts to an inventive step.

[0017] [Figure 1] FIG. 2 is a diagram illustrating the working principle of the auxiliary support device for the oblique support rod provided by an embodiment of the present invention; [Figure 2] FIG. 2 is a view taken along the arrow A in FIG. [Figure 3] FIG. 2 is a front view of a pile frame provided by an embodiment of the present invention. [Figure 4] FIG. 4 is a left side view of FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0018] The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the present invention. All other embodiments that can be obtained by those skilled in the art based on the embodiments of the present invention without expending creative labor shall fall within the protection scope of the present invention.

[0019] In order to enable those skilled in the art to better understand the solutions of the present invention, the present invention will be described in more detail below in combination with drawings and specific embodiments.

[0020] Referring to Figures 1 to 4, Figure 1 is a diagram illustrating the operating principle of the diagonal support rod auxiliary support device provided by an embodiment of the present invention, Figure 2 is a view taken along arrow A in Figure 1, Figure 3 is a front view of the pile frame provided by an embodiment of the present invention, and Figure 4 is a left side view of Figure 3.

[0021] The present invention provides an auxiliary support device for diagonal support rod, which can be connected between the column 1 of the pile frame and the diagonal support rod 3, without interfering with the normal lifting and rotating operation of the diagonal support rod 3. When the diagonal support rod 3 tends to deform, the auxiliary support device for diagonal support rod can be used to restrain and support the diagonal support rod 3, thereby improving the rigidity of the diagonal support rod 3 and the stability of the pile frame.

[0022] In an embodiment of the present invention, the diagonal support rod auxiliary support device includes a support mechanism 4, a hinge connection lug 41 at a first end of the support mechanism 4 for hinged connection with the column 1 of the pile frame, and a sleeve 46 at a second end of the support mechanism 4. The sleeve 46 is openable and closable, and its diameter after closing is larger than that of the diagonal support rod 3. Therefore, after closing, the sleeve 46 can be coaxially installed with the diagonal support rod 3 with a set circumferential gap, without affecting the normal operation of the diagonal support rod 3. In extreme conditions, if the deformation of the diagonal support rod 3 under pressure exceeds the gap with the sleeve 46, the sleeve 46 and the support mechanism 4 can support and restrain the diagonal support rod 3. Furthermore, the drive module and the telescopic drive unit of the support mechanism 4 are used to adjust the position of the second end of the support mechanism 4, so that the sleeve 46 can maintain its circumferential gap installed with respect to the diagonal support rod 3.

[0023] Considering that a conventional pile frame usually includes one column 1 and two diagonal support rods 3, the support mechanism 4 provided by the embodiment of the present invention is specifically a scissors support mechanism 4, which includes two cross-installed scissors support rods 43, the middle parts of which are hingedly connected via a hinge connection shaft, and the second ends of the two scissors support rods 43 are both connected to a telescopic drive unit, which uses a telescopic cylinder 44, and a pair of telescopic cylinders 44 connected to the second ends of the two scissors support rods 43 are installed parallel to each other. An inner rod 45 is connected to the tip of each telescopic cylinder 44, and a sleeve 46 is connected to the tip of the inner rod 45.

[0024] To open and close the sleeve 46, the sleeve 46 includes two half-cylinders, i.e., a first half-cylinder and a second half-cylinder, which can be opened and closed by reversing in the circumferential direction of the sleeve 46. The first half-cylinder is usually larger in circumferential direction than the second half-cylinder, and the inner rod 45 is fixedly connected to the first half-cylinder. To facilitate the opening and closing of the sleeve 46, this embodiment of the present invention specially provides an opening and closing cylinder 47 that is obliquely connected between the inner rod 45 and the second half-cylinder. When the opening and closing cylinder 47 is contracted, the second half-cylinder is reversibly opened outward, and when the opening and closing cylinder 47 is extended, the sleeve 46 is closed.

[0025] In a further embodiment, an opening / closing drive unit is further connected between the pair of scissors support rods 43. The opening / closing drive unit may be an opening / closing cylinder 47 shown in FIG. 2 or may be configured as an electric push rod accordingly. The opening / closing cylinder 47 is specifically installed between the second ends of the scissors support rods 43 to adjust the pitch of the pair of sleeves 46 and ensure that the sleeves 46 and the diagonal support rods 3 are respectively slidably fitted and connected. The drive module uses a lifting cylinder 49, whose bottom end is hinged to the column 1 and whose top end is hinged directly below the hinge connection point of the scissors mechanism. That is, the opening and closing of the scissors mechanism does not affect the lifting and lowering movement of the lifting cylinder 49.

[0026] In a preferred embodiment of the above embodiment, the auxiliary support device for the diagonal support rod provided by the present invention further includes a plurality of distance sensors uniformly installed along the circumference of the sleeve 46. The distance sensors are used to detect the distance between the sleeve 46 and the outer wall of the diagonal support rod 3, and the telescopic drive unit, drive module, and adjustment cylinder 48 are adjusted to ensure that the sleeve 46 and the diagonal support rod 3 are spaced apart from each other in the circumferential direction. This distance is typically about 20 mm, but can be adjusted by 5 to 10 mm depending on actual needs. To facilitate adjustment, the auxiliary support device further includes a controller connected to all the distance sensors, which is further connected to the telescopic drive unit, drive module, and adjustment cylinder 48. The controller controls the telescopic drive unit, drive module, and adjustment cylinder 48 to operate according to the distances detected by the distance sensors installed around the circumference of the sleeve 46, thereby ensuring that the sleeve 46 and the diagonal support rod 3 are spaced apart from each other in the circumferential direction. At the beginning of the mounting process, the movement of the adjusting cylinder 48 has already been controlled, so that the expansion angle of the scissors support rod 43 matches the column 1 and the two diagonal support rods 3, respectively. It should be noted that in this case, the adjustment of the gap by the adjusting cylinder 48 is merely a fine adjustment, and the hinge connection between the hinge connection ear 41 of the scissors mechanism and the column 1 meets the requirement of this fine adjustment.

[0027] Specifically, a laser sensor is adopted as the distance sensor, and in order to prevent the distance sensor from being damaged when the oblique support rod 3 deforms and contacts the inner wall of the sleeve 46, the distance sensor may be mounted in the following manner: For example, an annular groove is formed on the inner wall of the sleeve 46, and multiple distance sensors are mounted in the annular groove, which ensures that the distance sensors will not be damaged when the oblique support rod 3 contacts the inner wall of the sleeve 46. Furthermore, multiple through-holes may be formed in the circumferential direction of the sleeve 46, and distance sensors may be mounted on the outer wall of the sleeve 46 to detect the pitch between the oblique support rod 3 and the wall surface.

[0028] To ensure that the diagonal support rods 3 contact the sleeves 46 in a timely manner when strain occurs due to force exerted on them under severe working conditions, this embodiment of the present application further includes a control switch connected to the controller, which controls the power on / off of the controller. When the diagonal support rod auxiliary support device is installed, the control switch closes, power is supplied to the controller, and the controller executes control logic for the distance sensor, telescopic drive unit, drive module, and adjustment cylinder 48 to ensure that the sleeves 46 and diagonal support rods 3 are installed with equal circumferential clearance. After the diagonal support rod auxiliary support device is installed, the control switch is turned off, the controller loses power, and the control logic for equal circumferential clearance of the sleeves 46 and diagonal support rods 3 no longer works. The diagonal support rods 3 are immediately restrained by the sleeves 46 after deformation, which significantly improves the rigidity of the diagonal support rods 3 and the overall stability of the pile frame.

[0029] First, the diagonal support rod auxiliary support device is installed. To install the device, first install one end of the hinge connection ear 41 on the column 1, and then similarly hinge-connect the bottom end of the lifting cylinder 49 to the column 1. Next, the opening / closing cylinder 47 is driven to open the two sleeves 46, and the lifting cylinder 49 is adjusted so that the entire support mechanism is perpendicular to the diagonal support rod 3. Next, the telescopic cylinder 44, adjustment cylinder 48, and lifting cylinder 49 are controlled to move in accordance with the distance between the sleeve 46 and the diagonal support rod 3 measured by the distance sensor in the sleeve 46, so that the distance between the sleeve 46 and the diagonal support rod 3 is maintained at approximately 20 mm in all directions. After adjustment, the sleeve 46 is closed, completing the installation and positioning.

[0030] During operation, if the verticality of the column 1 needs to be adjusted, in this case the relative position between the column 1 and the diagonal support rod 3 changes, in this case the auxiliary support device must automatically adapt to the change so as to maintain the gap between the sleeve 46 and the diagonal support rod 3, in this case the control switch needs to be closed and the control logic of the controller is enabled.

[0031] An embodiment of the present invention provides a pile frame, the structure of which can be seen in Figures 3 and 4, and the hinge connection between the column 1 of the pile frame and the diagonal support rod auxiliary support device can be seen in Figure 2. The pile frame includes a body 2, a column 1 hinged to a first end of the body 2, two sets of diagonal support rods 3 hinged to a second end of the body 2 to diagonally connect the body 2 to the column 1, and a diagonal support rod auxiliary support device as described in the above embodiment that connects the column 1 and the two sets of diagonal support rods 3. The two sets of diagonal support rods 3 are installed at an angle and form a triangular pyramid shape with the column 1, and two sets of hinge connection ears 41 at the first end of the scissors mechanism and the bottom end of the drive module are both hingedly connected to the column 1, and two sleeves 46 at the second end of the scissors mechanism are respectively fitted into the gaps and connected to the pair of diagonal support rods 3. To achieve engagement with the hinge connection ears 41, two sets of hinge connection bases 11 are installed at predetermined heights on the column 1, and vertical grooves are opened in the middle of the hinge connection bases 11 in which the hinge connection ears 41 can be placed, the hinge connection ears 41 are placed in the vertical grooves, and the pin shaft 42 passes through the hinge connection bases 11 and the hinge connection ears 41 to achieve hinge connection. It should be noted that the width of the vertical grooves is greater than the thickness of the hinge connection ears 41, so that when the opening and closing cylinder 47 fine-tunes the angle of the scissors mechanism, the hinge connection ear 41 at the first end of the scissors mechanism can move within a set gap.

[0032] Preferably, the scissors mechanism is specifically configured so that the sleeve 46 is connected to half of the diagonal support rod 3, so that when the strain generated at the sleeve 46 on the diagonal support rod 3 is greater than the circumferential gap between the sleeve 46 and the diagonal support rod 3, the sleeve 46 will restrict its position relative to the diagonal support rod 3, thereby increasing the rigidity of both the upper and lower parts of the diagonal support rod 3 located at the sleeve 46 by four times, thereby improving the stability of the pile frame.

[0033] It should be noted that terms such as "first" and "second" are used herein merely to distinguish an entity from one or more other entities, and do not necessarily require or imply that any such entity relationship or ranking exists between the entities.

[0034] The above has provided a detailed introduction to the pile frame and its diagonal support rod auxiliary support device provided by the present invention. In this specification, the principles and embodiments of the present invention are explained using specific examples, and the explanation of the above examples is only intended to contribute to understanding the method and core idea of ​​the present invention. It should be noted that those skilled in the art may make some improvements and modifications to the present invention without departing from the principles of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention. [Explanation of symbols]

[0035] 1 ···Column; 2 ···Airframe; 3 ··· diagonal support rod; 4...Support mechanism; 11 ··· Hinge connection base; 41 ···Hinge connection ear; 42 ···Pin shaft; 43 ···Scissor support rod; 44 ···Telescopic cylinder; 45 ··· inner rod; 46 ··· sleeve; 47 ···Open and close cylinder; 48 ···adjusting cylinder; 49···Lifting cylinder.

Claims

1. An auxiliary support device for diagonal support rods used in a pile frame of a pile driver having a column and two diagonal support rods supporting the upper part of the column, comprising a support mechanism, the first end of the support mechanism being one end closest to the column and having a hinge connection ear for hinge connection to the column, and the second end of the support mechanism being one end closest to the diagonal support rod and having an openable sleeve for being installed with a predetermined gap in the circumferential direction relative to the diagonal support rod, a drive module for supporting and driving the second end of the support mechanism to rotate up and down along the diagonal support rod about the hinge connection ear; When the oblique support rod is operating normally, the sleeve of the support mechanism does not contact the oblique support rod, and when the oblique support rod tends to deform, the sleeve of the support mechanism contacts the oblique support rod to restrain and support the oblique support rod; the support mechanism is further provided with an extension / retraction drive unit, and the support mechanism is extended and retracted by the extension / retraction drive unit, and the position of the second end of the support mechanism is adjusted by the drive module and the extension / retraction drive unit, so that the sleeve is maintained in a state of being installed with a gap in the circumferential direction relative to the oblique support rod during normal operation of the oblique support rod. An auxiliary support device for a diagonal support rod.

2. The support mechanism is a scissors mechanism including two scissors support rods hinged at their middles.

2. The auxiliary support device for a diagonal support rod according to claim 1.

3. the telescopic drive unit includes a telescopic cylinder provided at the tip of the scissors support rod and an inner rod connected to the telescopic cylinder, the tip of the inner rod is connected to the sleeve, and the pair of telescopic cylinders are installed in parallel; 3. The auxiliary support device for a diagonal support rod according to claim 2.

4. An adjustment cylinder that adjusts the opening angle of the scissors mechanism is connected between the pair of scissors support rods.

3. The auxiliary support device for a diagonal support rod according to claim 2.

5. the drive module is a lift cylinder whose tip is hinged below the hinge connection point of the scissors mechanism; 5. The auxiliary support device for a diagonal support rod according to claim 4.

6. The sleeve has a plurality of distance sensors disposed along a circumferential direction to detect the pitch between the cylindrical wall of the sleeve and the oblique support rod, The distance sensor, the telescopic drive unit, and the controller connected to the drive module are further included, and the controller is used to control the telescopic drive unit and the drive module according to the detection result of the distance sensor to set the sleeve and the oblique support rod at equal gaps in the circumferential direction.

6. The auxiliary support device for a diagonal support rod according to claim 2.

7. The sleeve includes a first half-cylinder fixedly connected to the inner rod and a second half-cylinder invertedly connected to the first half-cylinder, and an opening / closing cylinder is connected between the second half-cylinder and the inner rod.

4. The auxiliary support device for a diagonal support rod according to claim 3.

8. Further comprising a control switch for connecting and controlling the controller; 7. The auxiliary support device for a diagonal support rod according to claim 6.

9. a pile frame including a body, a column hingedly connected to a first end of the body, a pair of diagonal support rods hingedly connected to a second end of the body to connect the column and the body at an angle; and the diagonal support rod auxiliary support device according to any one of claims 2 to 8, wherein one end of the drive module and a first end of the scissors mechanism are both hingedly connected to the column, and the sleeves are respectively inserted corresponding to the diagonal support rods; A pile frame characterized by:

10. The sleeve is connected to half of the diagonal support rod, and the scissors mechanism is installed perpendicular to the diagonal support rod.

10. A pile frame according to claim 9.

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