Pipe jacking machine

Abstract

The utility model relates to a pipe jacking machine, wherein including the flange plate for connecting the machine head rear section, the casing and the pipeline, one end of casing is connected with flange plate, its other end is connected with the pipeline, the first shield tail brush is located in the outside of one end of casing near the movable cutter head, the utility model discloses a first shield tail brush is equipped with outside casing, and the rock fragment that is cut by cutter head is effectively blocked by the first shield tail brush and falls into the outer wall space behind the pipeline, avoids the influence that the accumulation of slag causes to construction, and such setting not only protects the normal operation of equipment, but also prolongs the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline excavation engineering equipment, specifically to a pipe jacking machine. Background Technology

[0002] With the continuous advancement of pipeline construction, the need for construction across special terrains such as highways, railways, and complex building complexes is becoming increasingly urgent. Traditional pipe jacking methods, which rely on manual excavation, have gradually been phased out due to their susceptibility to collapse accidents, low construction efficiency, and high environmental sensitivity. Against this backdrop, pipe jacking technology, with its unique advantages, has secured a significant position in trenchless tunneling construction.

[0003] As the core equipment in construction, the pipe jacking machine typically consists of components such as a cutterhead, cutter housing, power unit, soil removal device, and deviation correction device. During operation, the pipe jacking machine first uses the power unit located in the cutter housing to drive the cutterhead to excavate the tunnel. Then, the soil removal device removes the soil or mud from the tunnel. Next, the pipe segments are hoisted into the newly excavated tunnel. This cycle is repeated until the pipe jacking machine is successfully advanced from the starting shaft to the receiving shaft.

[0004] However, in practical applications, pipe jacking machines have also revealed some problems. Due to the design feature that the diameter of the jacking head is larger than the diameter of the pipe, coupled with the gap between the pipe wall and the tunnel wall that is difficult to eliminate, rock fragments cut by the jacking head often fall into the outer space behind the pipe during construction, leading to the accumulation of debris. This situation not only increases the risk of rock debris blocking the pipe, pipe seizure, and increased jacking force, but also causes a large loss of drag-reducing mud in the downward straight section, seriously affecting the drag-reduction effect and even potentially leading to the failure of pipe jacking construction. Utility Model Content

[0005] This utility model provides a pipe jacking machine that can effectively block rock fragments and slag, preventing them from accumulating in the outer wall space behind the pipe, thereby ensuring the smooth progress of construction.

[0006] The technical solution of this utility model is a pipe jacking machine, including a flange for connecting the rear section of the machine head, a housing, and a pipe. One end of the housing is connected to the flange, and the other end is connected to the pipe. A first shield tail brush is arranged around the outer side of the housing near the movable cutter head.

[0007] Preferably, the housing is equipped with a drive cylinder for driving the cutter head to move forward. One end of the drive cylinder is fixedly connected to the flange, and the other end is abutted against the pipe. The flange is driven by the drive cylinder to extend and retract relative to the housing.

[0008] Preferably, the shell is divided into a first tube and a second tube. One end of the first tube is connected to a flange, and the other end is connected to the second tube. The second tube is fitted onto the outside of the pipe, and the first shield tail brush is evenly distributed around the outside of the first tube.

[0009] Preferably, the inner wall of the second pipe is provided with a sealing assembly, which includes a second shield tail brush, which is evenly distributed around the connection between the second pipe and the pipeline.

[0010] Preferably, reinforcing ribs are evenly distributed and arranged around the connection between the first tube and the second tube.

[0011] Preferably, the diameter of the first tube is smaller than the diameter of the second tube, and a stepped transition is provided between the two. The reinforcing ribs are divided into outer reinforcing ribs and inner reinforcing ribs. The outer reinforcing ribs are located on the outside of the first tube and are connected to the first tube and the stepped transition respectively to form a supporting facade. The inner reinforcing ribs are located on the inside of the second tube and are connected to the second tube and the stepped transition respectively to form a supporting facade.

[0012] Preferably, a sealing ring is provided around the inner wall of the second tube.

[0013] Preferably, the inner wall of the second pipe is provided with a support ring for supporting the pipe channel.

[0014] Preferably, the supporting ring is divided into a full supporting ring and a half supporting ring. The full supporting ring is arranged around the inner wall of the second pipe body, and the half supporting ring is arranged on the inner wall below the second pipe body to support the bottom of the pipe channel.

[0015] Preferably, the flange has an internal cavity, and the cavity is provided with evenly distributed supporting reinforcing ribs.

[0016] The present invention has the following beneficial effects: (1) The present invention provides a first shield tail brush on the outside of the shell, which effectively blocks the rock fragments cut by the cutter head from falling into the outer wall space behind the pipe, thus avoiding the accumulation of slag and soil that affects the construction. This setting not only protects the normal operation of the equipment, but also extends the service life of the equipment; (2) The cutter head can be driven to apply thrust and move forward by the drive cylinder inside the shell, which further improves the construction efficiency; (3) The second shield tail brush set between the second pipe body and the pipe connection further enhances the sealing performance and effectively prevents slag and soil from entering the shell from the gap between the pipe and the shell, thereby reducing the probability of equipment failure; (4) The reinforcing ribs between the first pipe body and the second pipe body significantly improve the overall strength and stability of the shell. The outer reinforcing ribs and the inner reinforcing ribs form a supporting surface on the outer and inner sides, respectively, which can effectively disperse the external force during the construction process and reduce the risk of shell damage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the connection structure between the shell and the pipe in this utility model;

[0022] Figure 4 yes Figure 2 A magnified view of the area marked "A" in the diagram;

[0023] Among them, 1. flange, 2. shell, 3. pipe, 4. first shield tail brush, 5. drive cylinder, 6. first pipe body, 7. second pipe body, 8. second shield tail brush, 9. reinforcing rib, 10. stepped transition, 11. outer reinforcing rib, 12. inner reinforcing rib, 13. sealing ring, 14. support ring, 15. full support ring, 16. half support ring, 17. support reinforcing rib. Detailed Implementation

[0024] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0025] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," "right," "top," and "bottom" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0026] Furthermore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any combination of one or more of the associated listed items.

[0027] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various elements, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from one another. For example, without departing from the scope of this disclosure, a first element may also be referred to as a second element, and similarly, a second element may also be referred to as a first element.

[0028] like Figure 1 and Figure 2 As shown, this utility model proposes a pipe jacking machine, including a flange 1, a housing 2, and a pipe 3 for connecting the rear section of the machine head. One end of the housing 2 is connected to the flange 1, and the other end is connected to the pipe 3. A first shield tail brush 4 is arranged around the outer side of the housing 2 near the movable cutter head. Specifically, the flange 1 is equipped with a rotating cutting head, which, under the driving action of a drive device (such as a drive cylinder 5), performs forward rotating cutting of rock and soil. As the cutting head advances, the rock and soil are broken into small pieces. During this process, by arranging the first shield tail brush 4 around the outer side of the housing 2 near the movable cutter head, when rock fragments are thrown backward, the first shield tail brush 4 acts as a barrier. Utilizing the elasticity and tightly arranged structure of its bristles, it can prevent the rock fragments from continuing to move backward. As the pipe jacking machine continues to advance, the rock fragments fall into a pre-set channel device such as a soil discharge device connected to the cutter head and are transported to the outside, thereby preventing them from falling into the outer wall space behind the pipe 3 and accumulating. This ensures that materials such as construction waste are discharged through designated channels and do not accumulate in places where they should not be, thus guaranteeing the smooth progress of construction.

[0029] like Figure 2 and Figure 3 As shown, the preferred driving method for advancing the cutter head described above is a drive cylinder 5. The housing 2 is equipped with a drive cylinder 5 for driving the cutter head forward. One end of the drive cylinder 5 is fixedly connected to the flange 1, and the other end abuts against the pipe 3. The flange 1 is driven by the drive cylinder 5 to extend and retract relative to the housing 2. Specifically, the drive cylinder 5 serves as the power source for the pipe jacking machine. During operation, high-pressure oil is injected into the drive cylinder 5 through the hydraulic system. The pressure of the high-pressure oil acts on the piston of the drive cylinder 5, causing the piston to move forward or backward. Since one end of the drive cylinder 5 is fixedly connected to the flange 1, when the piston moves forward, it pushes the flange 1 forward, thereby driving the cutter head mounted on the flange 1 to move forward, achieving cutting and advancing of the rock and soil. When it is necessary to adjust the position of the cutter head, retract it, or operate the pipe 3 at the rear end forward, the hydraulic system controls the flow of oil, causing the piston to move backward, thereby pulling the flange 1 to extend and retract relative to the housing 2. The drive cylinder 5 can precisely control the forward and backward extension and retraction displacement of the flange 1, thereby adjusting the cutting depth and feed speed of the cutter head according to different geological conditions and construction requirements. This makes the construction process more flexible and controllable, improving the accuracy and quality of construction. Simultaneously, when encountering hard rock or complex geological structures, the drive cylinder 5 can provide sufficient thrust to ensure smooth cutting and feed of the cutter head. For example, when encountering excessive resistance, the drive cylinder 5 can automatically adjust the thrust to prevent equipment damage due to overload.

[0030] Preferably, the housing 2 is divided into a first tube 6 and a second tube 7. One end of the first tube 6 is connected to the movable cutter head, and the other end is connected to the second tube 7. The second tube 7 is fitted onto the outside of the pipe 3, and the first shield tail brush 4 is evenly distributed around the outside of the first tube 6. The first tube 6 is used to connect to the movable cutter head and bear the cutting force, while the second tube 7 provides protection and support for the pipe 3. This clear division of labor improves the overall performance of the equipment.

[0031] like Figure 2As shown, during the operation of the pipe jacking machine, due to the gap between the second pipe body 7 and the pipe 3, substances such as soil, sand, and groundwater may enter this gap. At this time, a sealing assembly is provided on the inner wall of the second pipe body 7, including a second shield tail brush 8. The second shield tail brush 8 is evenly distributed around the connection between the second pipe body 7 and the pipe 3, and functions through this arrangement. The bristles of the second shield tail brush 8 tightly surround the outside of the pipe 3. When external substances attempt to enter the gap, the bristles form a sealing barrier, preventing their entry. Simultaneously, due to the elasticity of the bristles, they can adapt to slight shaking and displacement of the pipe 3 during its advancement, maintaining a good sealing effect. This enhanced sealing performance effectively prevents external substances such as soil, sand, and groundwater from entering the gap, avoiding any impact on the normal operation of the pipe jacking machine, such as blockage of the pipe 3 or damage to the equipment.

[0032] like Figure 1 , Figure 2 and Figure 4 As shown, preferably, during the operation of the pipe jacking machine, the cutting action of the movable cutterhead and the various forces generated during the advancement of the pipe 3 will exert significant pressure and stress on the shell 2. A uniformly distributed, circumferentially arranged reinforcing rib 9 is provided between the connection between the first pipe body 6 and the second pipe body 7, which can enhance the structural strength of the shell 2. Specifically, when external forces act on the shell 2, the reinforcing rib 9 will share a portion of the stress. The distribution of the reinforcing rib 9 allows the stress to be distributed relatively evenly to various parts, avoiding localized stress concentration. The reinforcing rib 9 itself has high strength and rigidity, and can withstand large tensile, compressive, and bending forces. When subjected to external forces, the reinforcing rib 9 will undergo slight deformation, but will not easily break or be damaged. In this way, the reinforcing rib 9, together with the first pipe body 6 and the second pipe body 7, enhances the stability and deformation resistance of the entire shell 2.

[0033] like Figure 4 As shown, the diameter of the first pipe body 6 is smaller than that of the second pipe body 7, and a stepped transition 10 is provided between the two. The reinforcing rib 9 is divided into an outer reinforcing rib 11 and an inner reinforcing rib 12. The outer reinforcing rib 11 is located on the outside of the first pipe body 6 and is connected to the first pipe body 6 and the stepped transition 10 respectively to form a supporting facade. When an external force is applied to the equipment, the outer reinforcing rib 11 first bears a portion of the external pressure and tension. The outer reinforcing rib 11 is tightly connected to the first pipe body 6 and the stepped transition 10, distributing the force received to the first pipe body 6 and the stepped transition 10. This can enhance the strength of the first pipe body 6 at the connection point and prevent it from deforming or being damaged by external forces.

[0034] Meanwhile, the inner reinforcing rib 12 is disposed on the inner side of the second pipe body 7 and is connected to the second pipe body 7 and the step transition 10 respectively to form a supporting facade. When the equipment is subjected to internal pressure or other forces, the inner reinforcing rib 12 plays a supporting role. The inner reinforcing rib 12 is connected to the second pipe body 7 and the step transition 10 to form a supporting facade, which can withstand the pressure and impact from the inside and transmit the force to the second pipe body 7 and the step transition 10, thereby enhancing the stability of the second pipe body 7 at the connection point.

[0035] The step transition 10 is a critical connection point between the first pipe body 6 and the second pipe body 7, and is prone to significant stress concentration. The outer reinforcing rib 11 and the inner reinforcing rib 12 are connected to the step transition 10 to form a supporting surface, which can greatly enhance the strength of the connection and effectively prevent the connection from breaking or loosening under stress, thus ensuring the reliability of the equipment.

[0036] like Figure 2 and Figure 3 As shown, due to the gap between the connection between pipe 3 and the second pipe body 7, a sealing ring 13, which is arranged around the inner wall of the second pipe body 7, tightly fits and fills the gap between pipe 3 and the second pipe body 7. Several sealing rings 13 can be provided depending on the actual situation. When external substances (such as soil, groundwater, etc.) attempt to enter through the gap between the second pipe body 7 and pipe 3, the sealing ring 13 can effectively prevent the penetration of external substances, forming a reliable sealing barrier. The sealing ring 13 is usually made of a material with elasticity and sealing properties, such as rubber. Its elasticity allows the sealing ring 13 to adapt to the slight shaking and displacement of pipe 3 during pipe 3 advancement, always maintaining close contact with the outer surface of pipe 3.

[0037] like Figure 2 and Figure 3 As shown, the inner wall of the second pipe body 7 is provided with support rings 14 for supporting the pipe 3. The support rings 14 are used to bear the weight of the pipe 3 and various forces generated during its advancement. Several support rings 14 can be provided depending on the actual situation. The support rings 14 are evenly distributed on the inner wall of the second pipe body 7, ensuring that the pipe 3 maintains a stable position during advancement and preventing it from sinking or shifting due to gravity or other external forces. Furthermore, during the advancement of the pipe 3, a certain amount of friction may be generated between the support rings 14 and the pipe 3. To reduce friction, the surface of the support rings 14 can be specially treated, such as using a smooth material or adding a lubricating coating, to ensure that the pipe 3 can slide smoothly on the support rings 14.

[0038] Preferably, the supporting ring 14 is divided into a full supporting ring 15 and a half supporting ring 16. The full supporting ring 15 is arranged around the inner wall of the second pipe body 7, forming a relatively complete contact with the outer surface of the pipe 3, providing all-round support for the pipe 3. The full supporting ring 15 can evenly distribute the weight of the pipe 3, preventing the pipe 3 from swaying or shifting in the horizontal direction. At the same time, the full supporting ring 15 can also restrict the radial movement of the pipe 3, ensuring that the pipe 3 always remains coaxial and horizontal with the shell 2.

[0039] The supporting semi-ring 16 is located on the inner wall below the second pipe body 7, mainly used to support the bottom of the pipe 3. Because the second shell 2 and its connected bottom bear significant pressure under gravity, the supporting semi-ring 16 provides targeted additional support to the bottom of the pipe 3, effectively preventing deformation or damage to the bottom of the pipe 3 due to excessive stress. Simultaneously, the supporting semi-ring 16 and the supporting full ring 15 work together to maintain the stability of the pipe 3.

[0040] like Figure 1 As shown, during the operation of the pipe jacking machine, the cutter head on flange 1 performs rotary cutting operations such as cutting rock and soil, and will be subjected to huge forces from all directions. Flange 1 has an internal cavity, within which supporting reinforcing ribs 17 are evenly distributed. When the cutter head cuts the rock and soil, the resulting reaction force is transmitted to flange 1, and these supporting reinforcing ribs 17 can evenly distribute the force throughout the entire structure of flange 1. Because the supporting reinforcing ribs 17 are evenly distributed, they can bear and transmit these forces from different angles and positions, avoiding excessive local stress that could lead to deformation or damage to flange 1. Furthermore, the supporting reinforcing ribs 17 themselves have high strength and rigidity, capable of resisting various stresses such as compression, tension, and bending. When subjected to external forces, the supporting reinforcing ribs 17 may undergo slight deformation, but will not easily break or lose their supporting function. In this way, the supporting reinforcing ribs 17 and flange 1 work together to enhance the overall stability and deformation resistance of flange 1. To prevent water used for cutting from entering the outer wall behind the flange, a groove for installing a waterproof rubber ring 18 is provided on the outer ring surface of the flange 1. The waterproof ring 18 is installed to achieve a sealing effect against water.

[0041] The above description is merely a preferred embodiment of this utility model. This utility model is not limited to the above-described embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this disclosure, as long as they achieve the same technical effect, should be included within the scope of protection of this disclosure and should fall under the protection scope of this utility model. Within the protection scope of this utility model, its technical solutions and / or implementation methods can have various modifications and variations.

Claims

1. A pipe jacking machine, characterized in that, It includes a flange (1) for connecting the rear section of the machine head, a housing (2) and a pipe (3). One end of the housing (2) is connected to the flange (1) and the other end is connected to the pipe (3). A first shield tail brush (4) is provided around the outer side of the housing (2) near the flange (1).

2. The pipe jacking machine according to claim 1, characterized in that, The housing (2) is equipped with a drive cylinder (5) for driving the cutter head to move forward. One end of the drive cylinder (5) is connected and fixed to the flange (1), and the other end is against the pipe (3). The flange (1) is driven by the drive cylinder (5) to move back and forth relative to the housing (2).

3. The pipe jacking machine according to claim 1, characterized in that, The shell (2) is a tube, which is divided into a first tube (6) and a second tube (7). One end of the first tube (6) is connected to the flange (1), and the other end is connected to the second tube (7). The second tube (7) is fitted on the outside of the pipe (3). The first shield tail brush (4) is evenly distributed around the outside of the first tube (6).

4. The pipe jacking machine according to claim 3, characterized in that, The inner wall of the second tube (7) is provided with a sealing assembly, which includes a second shield tail brush (8), which is evenly distributed around the connection between the second tube (7) and the pipe (3).

5. A pipe jacking machine according to claim 3, characterized in that, A reinforcing rib (9) is provided evenly distributed around the connection between the first tube (6) and the second tube (7).

6. A pipe jacking machine according to claim 5, characterized in that, The diameter of the first tube (6) is smaller than that of the second tube (7), and a stepped transition (10) is provided between the two. The reinforcing rib (9) is divided into an outer reinforcing rib (11) and an inner reinforcing rib (12). The outer reinforcing rib (11) is located on the outside of the first tube (6) and is connected to the first tube (6) and the stepped transition (10) respectively to form a supporting facade. The inner reinforcing rib (12) is located on the inside of the second tube (7) and is connected to the second tube (7) and the stepped transition (10) respectively to form a supporting facade.

7. A pipe jacking machine according to claim 3, characterized in that, The inner wall of the second tube (7) is surrounded by a sealing ring (13).

8. A pipe jacking machine according to claim 3, characterized in that, The inner wall of the second pipe body (7) is provided with a support ring (14) for supporting the pipe (3).

9. A pipe jacking machine according to claim 8, characterized in that, The supporting ring (14) is divided into a full supporting ring (15) and a half supporting ring (16). The full supporting ring (15) is arranged around the inner wall of the second pipe body (7), and the half supporting ring (16) is arranged on the inner wall below the second pipe body (7) to support the bottom of the pipe (3).

10. A pipe jacking machine according to claim 1, characterized in that, The flange (1) has a cavity inside, and supporting reinforcing ribs (17) are evenly distributed inside the cavity.

11. A pipe jacking machine according to claim 1, characterized in that, The outer circumference of the flange (1) is provided with a groove for installing the waterproof rubber ring (18).

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