Adjustable diameter jacking iron for jacking pipe and method thereof

Abstract

The application discloses a diameter-adjustable top iron for pipe jacking and a method thereof, and belongs to the technical field of pipe jacking engineering construction. The diameter-adjustable top iron comprises a top iron body, a diameter adjusting member is arranged around the outer wall of the top iron body, a reserved groove and a connecting buckle are arranged at the center of the top iron body, the top end of the top iron body is connected with a supporting ring, and a connecting square and a supporting assembly are arranged on the front surface of the supporting ring. The application solves the problem of poor applicability of the prior art, the engaging teeth of every two top iron bodies are engaged, a steel rod is inserted into the overlapped pipe penetrating groove, an L-shaped clamping rod is inserted into the reserved groove, an L-shaped extension rod is inserted into another reserved groove, and two layers of diameter adjusting members are locked on the outer wall of the top iron body, so that the diameter of the top iron body is changed, and the diameter-adjustable top iron is applicable to various diameters of pipe jacking; the supporting ring is stretched into the inside of the pipe, a hydraulic cylinder is started to drive a hydraulic push rod to push the arc plate to the inside wall of the pipe, until the arc plate is attached to the inside wall of the pipe, so that the top iron body is tightly connected with the pipe.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking construction technology, specifically to a jacking iron with adjustable diameter for pipe jacking and its method. Background Technology

[0002] With the rapid progress of urban infrastructure construction, due to geological conditions and construction environment, and according to construction design drawings, many underground space development and construction processes involve the construction of tunnel projects, such as pipe jacking projects. According to the current construction technology, jacking iron is usually used to assist in jacking during the pipe jacking process.

[0003] However, in current practical applications, it still has the following two drawbacks:

[0004] 1. In the existing technology, the jacking iron used on site is a custom-made steel component, which is formed in one piece and is only suitable for jacking projects of one pipe diameter. In addition, it is heavy and cannot be reused, which has many limitations.

[0005] 2. In the existing technology, the connection between the jacking iron and the jacking pipe is fixed by a large number of bolts, which is cumbersome and time-consuming to operate and reduces work efficiency. Therefore, it does not meet the current needs. In response, we propose a jacking iron with adjustable diameter for jacking pipe and its method. Summary of the Invention

[0006] The purpose of this invention is to provide a jacking iron with adjustable diameter for jacking pipes and a method thereof. By engaging the interlocking teeth of two jacking iron bodies, inserting a steel rod into an overlapping pipe-passing groove, inserting an L-shaped clamping rod into a pre-reserved groove, and stretching an L-shaped extension rod into another pre-reserved groove, two layers of diameter-adjusting components are locked to the outer wall of the jacking iron body, thereby changing the diameter of the jacking iron body and making it suitable for jacking pipes of various diameters. A support ring is extended into the inside of the jacking pipe, and a hydraulic cylinder is activated to cause a hydraulic push rod to push an arc plate toward the inner wall of the jacking pipe until the arc plate is in contact with the inner wall of the jacking pipe, thereby making the jacking iron body tightly connected to the jacking pipe, thus solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a top iron for adjustable diameter jacking pipe and a method thereof, comprising: a top iron body, wherein a diameter adjustment member is arranged around the outer wall of the top iron body, a reserved groove is provided at the center of the top iron body, a connecting buckle is inserted into the reserved groove, the top end of the top iron body is connected to a support ring, a connecting block is fixedly provided at the center of the front of the support ring, and support components for reinforcing the connection between the top iron body and the jacking pipe are symmetrically arranged around the connecting block.

[0008] Furthermore, the diameter adjustment component is provided with one or more layers, including bite teeth, through-tube grooves and steel bars. The bite teeth are semi-arc-shaped and are arranged around the outer wall of the top iron body. Through-tube grooves are opened inside the bite teeth, and steel bars are inserted into the through-tube grooves at the junction of every two layers of bite teeth.

[0009] Furthermore, the connecting buckle includes an L-shaped locking rod, a through hole, an L-shaped extension rod, a spring tube, and a steel ball. The bottom end of the L-shaped locking rod has a through hole, and the center of the top end of the L-shaped extension rod is vertically connected to a spring tube. The top of the spring tube is connected to a steel ball, and the L-shaped extension rod is fitted into the through hole inside the L-shaped locking rod through the spring tube and the steel ball.

[0010] Furthermore, four extension shafts are symmetrically arranged on the side of the support ring away from the connecting block, and are connected to the top of the top iron body through the four extension shafts.

[0011] Furthermore, the support assembly includes hydraulic cylinders, hydraulic push rods, a horizontal plate, and an arc plate. There are four hydraulic cylinders, symmetrically arranged around the connecting block. The output end of the hydraulic cylinder is connected to a hydraulic push rod, the other end of the hydraulic push rod is connected to a horizontal plate, and the other end of the horizontal plate is connected to an arc plate.

[0012] Furthermore, the number of top iron bodies is not less than four, and each top iron body is detachably hinged to another top iron body through a diameter adjustment component.

[0013] Furthermore, one end of the L-shaped locking rod and the L-shaped extension rod are respectively embedded in the reserved slots of one top iron body and the other top iron body.

[0014] A method for using a jacking iron for an adjustable diameter jacking pipe, the method comprising the following steps:

[0015] S1: Determine the number of diameter adjustment components based on the diameter of the jacking pipe. For example, if the diameter of the jacking pipe used is DN, then two layers of diameter adjustment components are required.

[0016] S2: By engaging the interlocking teeth on the outer wall of one top iron body with the interlocking teeth on the outer wall of another top iron body, and inserting the steel rod into the overlapping slot of the two, the two diameter adjustment components can be allowed to rotate freely around the steel rod.

[0017] S3: Repeat the operation method of S2 until the outer wall of the top iron body is surrounded by two layers of diameter adjustment components, thereby achieving the purpose of adjusting the different diameters of the top iron body.

[0018] S4: By inserting the L-shaped locking rod into the reserved slot of the top iron body, stretching the L-shaped extension rod to insert it into one of the reserved slots of the top iron body surrounding the outer wall of the top iron body, and so on, until the top iron body in the middle and the top iron body surrounding the outer wall are hinged to each other, thereby locking the two diameter adjustment components to the outer wall of the top iron body.

[0019] S5: By extending the support ring at one end of the top iron body into the inside of the jacking pipe, the four sets of hydraulic cylinders are activated to cause the hydraulic push rod to push the horizontal plate and the arc plate toward the inner wall of the jacking pipe until the arc plate is in contact with the inner wall of the jacking pipe, thereby making the top iron body tightly connected to the jacking pipe.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This invention determines the number of diameter adjustment components based on the jacking pipe diameter. The interlocking teeth on the outer wall of one jacking iron body engage with the interlocking teeth on the outer wall of another jacking iron body. A steel rod is inserted into the overlapping slot of the two jacking iron bodies, allowing the two diameter adjustment components to rotate freely around the steel rod. An L-shaped clamp is inserted into a pre-reserved slot in the jacking iron body, and an L-shaped extension rod is stretched and inserted into a pre-reserved slot of one of the jacking iron bodies surrounding the outer wall of the jacking iron body. This process continues until the jacking iron body in the middle is hinged to the jacking iron body surrounding the outer wall, thus locking the two diameter adjustment components onto the outer wall of the jacking iron body. This achieves the purpose of adjusting the diameter of the jacking iron body to different diameters. Furthermore, the diameter adjustment components are easy to operate, can be repeatedly used, and are suitable for jacking pipe construction processes of various diameters.

[0022] 2. This invention extends the support ring at one end of the top iron body into the inner side of the jacking pipe, activates four sets of hydraulic cylinders to provide driving force, and uses the hydraulic cylinders to cause the hydraulic push rod to push the horizontal plate and the arc plate closer to the inner wall of the jacking pipe until the arc plate is in contact with the inner wall of the jacking pipe, thereby making the top iron body tightly connected to the jacking pipe. This improves the disadvantages of the original fixation by a large number of bolts, effectively shortens the working time, and improves the working efficiency. Attached Figure Description

[0023] Figure 1 This is a front view schematic diagram of a jacking iron for an adjustable diameter jacking pipe according to the present invention;

[0024] Figure 2 This is a partial schematic diagram of a jacking iron for an adjustable diameter jacking pipe according to the present invention;

[0025] Figure 3 This is a front view of the overall connection of the diameter adjustment component of the present invention;

[0026] Figure 4 This is a front view schematic diagram of a single component of the diameter adjustment mechanism of the present invention;

[0027] Figure 5 This is a front view schematic diagram of the two-component connection of the diameter adjustment component of the present invention;

[0028] Figure 6 This is a schematic cross-sectional view of the dual-component connection of the diameter adjustment component of the present invention;

[0029] Figure 7 This is a partial schematic diagram of the dual-component connection of the diameter adjustment component of the present invention;

[0030] Figure 8 This is a schematic cross-sectional view of a single component of the diameter adjustment mechanism of the present invention;

[0031] Figure 9 This is a front view schematic diagram of the support component of the present invention.

[0032] In the diagram: 1. Top iron body; 2. Diameter adjustment component; 3. Reserved slot; 4. Connecting buckle; 5. Support ring; 6. Connecting block; 7. Support assembly; 21. Engaging teeth; 22. Through-tube groove; 23. Steel rod; 41. L-shaped clamping rod; 42. Through hole; 43. L-shaped extension rod; 44. Spring tube; 45. Steel ball; 51. Extension shaft; 71. Hydraulic cylinder; 72. Hydraulic push rod; 73. Horizontal plate; 74. Arc plate. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] To address the technical limitations of existing jacking systems, which consist of custom-made steel components formed in one piece, suitable only for pipe jacking projects of a single pipe diameter, and are heavy, non-reusable, and have many drawbacks, please refer to [the relevant documentation / reference needed]. Figures 1-8 This embodiment provides the following technical solution:

[0035] A jacking iron with adjustable diameter for jacking pipe and a method thereof, comprising: a jacking iron body 1, wherein a diameter adjustment member 2 is arranged around the outer wall of the jacking iron body 1, wherein the number of jacking iron bodies 1 is not less than four, and each jacking iron body 1 is detachably hinged to another jacking iron body 1 through the diameter adjustment member 2, and a reserved groove 3 is provided at the center of the jacking iron body 1, and a connecting buckle 4 is inserted into the reserved groove 3.

[0036] The diameter adjustment component 2 is provided with one or more layers, including a biting tooth 21, a through-tube groove 22 and a steel rod 23. The biting tooth 21 is semi-arc and is arranged around the outer wall of the top iron body 1. The through-tube groove 22 is opened inside the biting tooth 21, and a steel rod 23 is inserted into the through-tube groove 22 at the junction of two layers of biting teeth 21.

[0037] The connecting buckle 4 includes an L-shaped locking rod 41, a through hole 42, an L-shaped extension rod 43, a spring tube 44, and a steel ball 45. The L-shaped locking rod 41 has a through hole 42 inside its bottom end. The center of the top end of the L-shaped extension rod 43 is vertically connected to the spring tube 44. The top of the spring tube 44 is connected to the steel ball 45. The L-shaped extension rod 43 is sleeved in the through hole 42 inside the L-shaped locking rod 41 through the spring tube 44 and the steel ball 45. One end of the L-shaped locking rod 41 and the L-shaped extension rod 43 are respectively embedded in the reserved groove 3 of one top iron body 1 and the other top iron body 1.

[0038] It should be noted that when the L-shaped extension rod 43 is stretched, the L-shaped extension rod 43 is snapped into the through hole 42 of the L-shaped clamp rod 41 by the steel ball 45, and the extension and contraction deformation of the connecting buckle 4 is achieved by the spring tube 44, thereby achieving the function of changing the length of the L-shaped extension rod 43.

[0039] Specifically, by determining the number of layers of diameter adjustment components 2 according to the diameter of the jacking pipe, the interlocking teeth 21 on the outer wall of one jacking iron body 1 are interlocked with the interlocking teeth 21 on the outer wall of another jacking iron body 1, and the steel rod 23 is inserted into the pipe groove 22 where the two overlap, so that the two layers of diameter adjustment components 2 can rotate freely around the steel rod 23; then, by inserting the L-shaped clamping rod 41 into the reserved groove 3 of the jacking iron body 1, and stretching the L-shaped extension rod 43 to insert it into the reserved groove 3 of one of the jacking iron bodies 1 surrounding the outer wall of the jacking iron body 1, and so on, until the jacking iron body 1 in the middle and the jacking iron body 1 surrounding the outer wall are hinged together, so that the two layers of diameter adjustment components 2 are locked on the outer wall of the jacking iron body 1, thereby achieving the purpose of adjusting the diameter of the jacking iron body 1. Moreover, the diameter adjustment components 2 are easy to operate, can be repeatedly used, and are suitable for the jacking construction process of pipes of various diameters, effectively improving the applicability of the existing jacking iron body 1.

[0040] To address the technical issue of the existing connection between the jacking body 1 and the jacking pipe, which relies on numerous bolts for locking and fixing, resulting in cumbersome and time-consuming operation and reduced work efficiency, please refer to [the relevant documentation / reference]. Figures 1-9 This embodiment provides the following technical solution:

[0041] The top of the top iron body 1 is connected to the support ring 5. A connecting block 6 is fixedly installed at the center of the front of the support ring 5. Support components 7 for reinforcing the connection between the top iron body 1 and the jacking pipe are symmetrically arranged around the connecting block 6.

[0042] Among them, four extension shafts 51 are symmetrically arranged on the side of the support ring 5 away from the connecting block 6, and are connected to the top of the top iron body 1 through the four extension shafts 51.

[0043] It should be noted that by connecting the support ring 5 to the top iron body 1 through the extension shaft 51, it can be used to prevent the reserved groove 3 in the middle of the top iron body 1 from being closed by the support ring 5. The extension shaft 51 makes a certain distance between the support ring 5 and the top iron body 1, so that the connecting buckle 4 can be properly inserted into the reserved groove 3.

[0044] The support assembly 7 includes a hydraulic cylinder 71, a hydraulic push rod 72, a horizontal plate 73, and an arc plate 74. There are four hydraulic cylinders 71, which are symmetrically arranged around the connecting block 6. The output end of the hydraulic cylinder 71 is connected to the hydraulic push rod 72, the other end of the hydraulic push rod 72 is connected to the horizontal plate 73, and the other end of the horizontal plate 73 is connected to the arc plate 74.

[0045] Specifically, by extending the support ring 5 at one end of the top iron body 1 into the inside of the jacking pipe, four sets of hydraulic cylinders 71 are activated to provide driving force. The hydraulic cylinders 71 cause the hydraulic push rod 72 to push the horizontal plate 73 and the arc plate 74 toward the inner wall of the jacking pipe until the arc plate 74 is in contact with the inner wall of the jacking pipe, thereby making the top iron body 1 tightly connected to the jacking pipe. This improves the disadvantages of the original method of fixing with a large number of bolts, effectively shortens the working time, and improves the working efficiency.

[0046] A method for using a jacking iron with an adjustable diameter jacking pipe specifically includes the following steps:

[0047] S1: Determine the number of diameter adjustment components 2 based on the diameter of the jacking pipe. For example, if the diameter of the jacking pipe used is DN800, then two layers of diameter adjustment components 2 are required.

[0048] S2: By engaging the interlocking teeth 21 on the outer wall of one of the top iron bodies 1 with the interlocking teeth 21 on the outer wall of the other top iron body 1, and inserting the steel rod 23 into the pipe groove 22 where the two overlap, the two diameter adjustment components 2 can rotate freely around the steel rod 23.

[0049] S3: Repeat the operation method of S2 until the outer wall of the top iron body 1 is surrounded by two layers of diameter adjustment components 2, so as to achieve the purpose of adjusting the different diameters of the top iron body 1.

[0050] S4: By inserting the L-shaped locking rod 41 into the reserved slot 3 of the top iron body 1, stretching the L-shaped extension rod 43 to insert it into one of the reserved slots 3 of the top iron body 1 surrounding the outer wall of the top iron body 1, and so on, until the top iron body 1 located in the middle and the top iron body 1 surrounding the outer wall are hinged to each other, thereby locking the two diameter adjustment members 2 on the outer wall of the top iron body 1.

[0051] S5: By extending the support ring 5 at one end of the top iron body 1 into the inner side of the jacking pipe, the four sets of hydraulic cylinders 71 are activated to cause the hydraulic push rod 72 to push the horizontal plate 73 and the arc plate 74 toward the inner wall of the jacking pipe until the arc plate 74 is in contact with the inner wall of the jacking pipe, thereby making the top iron body 1 tightly connected to the jacking pipe.

[0052] Working principle: By engaging the meshing teeth 21 of every two top iron bodies 1, inserting the steel rod 23 into the overlapping pipe groove 22, inserting the L-shaped clamping rod 41 into the reserved groove 3, and stretching the L-shaped extension rod 43 into another reserved groove 3, the two layers of diameter adjustment components 2 are locked onto the outer wall of the top iron body 1, thereby changing the diameter of the top iron body 1 to accommodate jacking pipes of various diameters; the support ring 5 is extended into the inside of the jacking pipe, and the hydraulic cylinder 71 is activated to cause the hydraulic push rod 72 to push the arc plate 74 toward the inner wall of the jacking pipe until the arc plate 74 is in contact with the inner wall of the jacking pipe, thereby making the top iron body 1 tightly connected to the jacking pipe, avoiding the drawbacks of a large number of bolts, and effectively improving working efficiency.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A jacking iron for an adjustable diameter jacking pipe, comprising: The top iron body (1) is characterized in that a diameter adjustment component (2) is arranged around the outer wall of the top iron body (1), a reserved groove (3) is opened at the center of the top iron body (1), a connecting buckle (4) is inserted into the reserved groove (3), the top of the top iron body (1) is connected to the support ring (5), a connecting block (6) is fixedly arranged at the center of the front of the support ring (5), and a support component (7) for reinforcing the connection between the top iron body (1) and the top pipe is symmetrically arranged around the connecting block (6). The diameter adjustment component (2) is provided with one or more layers, including a biting tooth (21), a through-tube groove (22) and a steel rod (23). The biting tooth (21) is semi-arc and is arranged around the outer wall of the top iron body (1). The biting tooth (21) is provided with a through-tube groove (22), and a steel rod (23) is inserted into the through-tube groove (22) at the junction of two layers of biting teeth (21). The connecting buckle (4) includes an L-shaped buckle (41), a through hole (42), an L-shaped extension rod (43), a spring tube (44), and a steel ball (45). The L-shaped buckle (41) has a through hole (42) inside its bottom end. The center of the top end of the L-shaped extension rod (43) is vertically connected to the spring tube (44). The top of the spring tube (44) is connected to the steel ball (45). The L-shaped extension rod (43) is sleeved in the through hole (42) inside the L-shaped buckle (41) through the spring tube (44) and the steel ball (45).

2. The jacking iron for an adjustable diameter jacking pipe according to claim 1, characterized in that: The support ring (5) has four extension shafts (51) symmetrically arranged on the side away from the connecting block (6), and is connected to the top of the top iron body (1) through the four extension shafts (51).

3. The jacking iron for an adjustable diameter jacking pipe according to claim 2, characterized in that: The support assembly (7) includes a hydraulic cylinder (71), a hydraulic push rod (72), a horizontal plate (73), and an arc plate (74). There are four hydraulic cylinders (71), which are symmetrically arranged around the connecting block (6). The output end of the hydraulic cylinder (71) is connected to the hydraulic push rod (72), the other end of the hydraulic push rod (72) is connected to the horizontal plate (73), and the other end of the horizontal plate (73) is connected to the arc plate (74).

4. The jacking iron for an adjustable diameter jacking pipe according to claim 3, characterized in that: The number of top iron bodies (1) is not less than four, and each top iron body (1) is detachably hinged to another top iron body (1) through a diameter adjustment component (2).

5. A jacking iron for an adjustable diameter jacking pipe according to claim 4, characterized in that: One end of the L-shaped clamp (41) and the L-shaped extension rod (43) are respectively embedded in the reserved slots (3) of one top iron body (1) and the other top iron body (1).

6. A method of using a jacking iron for an adjustable diameter jacking pipe as described in claim 5, characterized in that: Includes the following steps: S1: Determine the number of layers of diameter adjustment component (2) based on the diameter of the jacking pipe; S2: By engaging the interlocking teeth (21) on the outer wall of one of the top iron bodies (1) with the interlocking teeth (21) on the outer wall of the other top iron body (1), and inserting the steel rod (23) into the pipe groove (22) where the two overlap, the two diameter adjustment components (2) can rotate freely around the steel rod (23). S3: Repeat the operation method of S2 until the outer wall of the top iron body (1) is surrounded by two layers of diameter adjustment components (2), so as to achieve the purpose of adjusting the different diameters of the top iron body (1); S4: By inserting the L-shaped locking rod (41) into the reserved slot (3) of the top iron body (1), stretching the L-shaped extension rod (43) to insert it into the reserved slot (3) of one of the top iron bodies (1) surrounding the outer wall of the top iron body (1), and so on, until the top iron body (1) located in the middle and the top iron body (1) surrounding the outer wall are hinged to each other, thereby locking the two diameter adjustment members (2) on the outer wall of the top iron body (1); S5: By extending the support ring (5) at one end of the top iron body (1) into the inside of the jacking pipe, the four sets of hydraulic cylinders (71) are activated to cause the hydraulic push rod (72) to push the horizontal plate (73) and the arc plate (74) closer to the inner wall of the jacking pipe until the arc plate (74) is in contact with the inner wall of the jacking pipe, thereby making the top iron body (1) tightly connected to the jacking pipe.

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