Pipe section back-off prevention jacking device

Abstract

This utility model belongs to the technical field of pipe jacking equipment, and specifically relates to a jacking device for preventing pipe section retraction. The jacking component in this device can be used for jacking pipe sections. When the jacking component completes the jacking of the pipe section, that is, when a portion of the pipe section enters the soil layer, the telescopic rod of the anti-retraction component can push the fixing frame to the position of the pipe section in the soil layer. The clamping component then clamps the pipe section in the soil layer, thus fixing the pipe section in the soil layer and preventing it from retracting. This avoids the need to reposition and jacking the pipe section in the soil layer, ensuring construction efficiency. Simultaneously, it also prevents the pipe section in the soil layer from becoming misaligned due to retraction, which could affect construction quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipe jacking equipment, and specifically relates to a jacking device to prevent pipe sections from retracting. Background Technology

[0002] Currently, pipe jacking is increasingly being used in tunnel construction, and it is a non-excavation construction method under soil layers.

[0003] The working principle of the pipe jacking method is as follows: During construction, the hydraulic jack assembly and baffle are first installed in the reserved working well, with the baffle positioned opposite the construction position, and the hydraulic jack assembly placed on the baffle. Subsequently, the cutter head of the pipe jacking machine excavates along the predetermined axis at the location to be constructed. Then, the prefabricated pipe sections are gradually pushed towards the construction location using hydraulic jacks.

[0004] During construction, when it is necessary to add pipe sections into the reserved working well, the hydraulic jack assembly needs to be retracted in order to hoist the new pipe section in and place it between the hydraulic jack assembly and the pipe section in the soil. At this time, the jacking force of the hydraulic jack assembly on the pipe section in the soil disappears, and the large active earth pressure squeezes the pipe section in the soil, which may cause the pipe section in the soil to retract.

[0005] The existing method of stopping the pipe section from retreating in the soil layer involves using a robotic arm or steel bars and plates for simple support and stopping the retreat. This method cannot take immediate measures to stop the retreat of the pipe section in the soil layer. The position of the retreated pipe section in the soil layer may become skewed, making it difficult to control the construction quality. The only way to adjust the position of the pipe section in the soil layer is to reposition it, which leads to a decrease in construction efficiency. Utility Model Content

[0006] This invention provides a jacking device to prevent pipe section retraction, thereby solving the technical problem that the existing anti-retraction method only proceeds after the pipe section in the soil has retracted, which makes it impossible to take timely anti-retraction measures for the pipe section in the soil, thus affecting construction efficiency or construction quality.

[0007] This utility model is achieved through the following technical solution: A jacking device for preventing pipe section retraction includes a jacking assembly and a backstop assembly; The anti-reverse assembly includes a telescopic rod and a fixed frame. One end of the telescopic rod is mounted on the jacking assembly, and the telescopic direction of the telescopic rod is parallel to the direction of movement of the jacking end of the jacking assembly. The fixed frame has an inverted "U" shape and is slidably mounted in front of the jacking assembly along the direction of movement of the jacking end. The jacking end can pass through the fixed frame to push the pipe section. The other end of the telescopic rod is connected to the fixed frame, and the fixed frame is equipped with a clamping assembly for clamping the pipe section. After the pipe section is jacked up, the fixed frame is moved to the position of the pipe section by the telescopic rod, and the pipe section is clamped by the clamping assembly to achieve the anti-reverse effect.

[0008] To better realize this utility model, further optimizations are made to the above structure. The clamping assembly includes two cylinders, the fixed ends of the two cylinders are respectively set on the two inner side walls opposite to each other of the fixed frame, and the actuating ends of the two cylinders are each provided with a clamping block.

[0009] To better realize this utility model, the above structure is further optimized, and the clamping block includes a clamping plate and a push plate; The clamping plate is located at the actuating end of the cylinder, and the push plate is located on the side of the clamping plate near the jacking assembly and on the side of the clamping plate away from the cylinder. The push plate and the clamping plate together form an "L" shaped plate structure.

[0010] To better realize this utility model, further optimizations are made to the above structure, and the anti-reverse component further includes two slide rails; Both slide rails are located in front of the jacking assembly, and the two slide rails are respectively set on both sides of the jacking assembly. The length direction of the slide rails is parallel to the movement direction of the jacking end, and the two ends of the fixed frame are respectively slidably set on the two slide rails.

[0011] To better realize this utility model, further optimizations are made to the above structure. The anti-reverse assembly also includes a support frame for supporting the pipe section, which is arranged in front of the jacking assembly.

[0012] To better realize this utility model, further optimization is made to the above structure. Multiple support rollers are rotatably arranged on the support frame. The multiple support rollers are arranged at equal intervals along the direction of movement of the pushing end, and the axis of the support rollers is perpendicular to the direction of movement of the pushing end.

[0013] To better realize this utility model, the above structure is further optimized by providing a camera for detecting the status of the pipe section on the fixed frame.

[0014] To better realize this utility model, further optimizations are made to the above structure, wherein the jacking assembly includes a baffle, a top plate, and a jack assembly; The top plate is mounted on the baffle via a jack assembly, and the side of the top plate facing away from the baffle is provided with a jack for pressing the pipe section.

[0015] Compared with the prior art, this utility model has the following advantages: The jacking component in the jacking device provided by this utility model can be used for jacking pipe sections. When the jacking component completes the jacking of the pipe section, that is, when a part of the pipe section enters the soil layer, the telescopic rod of the anti-reverse component can push the fixed frame to the position of the pipe section in the soil layer, and clamp the pipe section in the soil layer by the clamping component, thereby fixing the pipe section in the soil layer and preventing the pipe section in the soil layer from retracting. This avoids the need to reposition and jacking the pipe section in the soil layer, thus ensuring construction efficiency. At the same time, it can also prevent the pipe section in the soil layer from becoming misaligned due to retraction, which would affect the construction quality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, 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.

[0017] Figure 1 This is a schematic diagram of the jacking device for preventing pipe section retraction according to this utility model.

[0018] Figure 2 This is a side view of a jacking device for preventing pipe section retraction according to this utility model.

[0019] Figure 3 This is a front view of a jacking device for preventing pipe section retraction according to this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the clamping component and the pipe section in the jacking device for preventing pipe section retraction according to this utility model.

[0021] In the picture: 1. Jacking assembly; 11. Baffle; 12. Top plate; 121. Jack head; 13. Jack assembly; 2. Anti-reverse assembly; 21. Telescopic rod; 22. Fixing frame; 221. Camera; 23. Clamping assembly; 231. Cylinder; 232. Clamping block; 2321. Clamping plate; 2322. Push plate; 24. Slide rail; 25. Support frame; 251. Support roller; 3. Pipe section. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In the embodiments of this application, such as Figures 1 to 4 As shown, the jacking device includes a jacking assembly 1 and a backstop assembly 2; wherein, The anti-reverse assembly 2 includes a telescopic rod 21 and a fixing frame 22, see [link / reference] Figure 1 and 2 ; One end of the telescopic rod 21 is mounted on the jacking assembly 1, and the telescopic direction of the telescopic rod 21 is parallel to the direction of movement of the jacking end of the jacking assembly 1. The fixed frame 22 has an inverted "U" shaped structure. The fixed frame 22 is slidably set in front of the jacking assembly 1 along the direction of the jacking end. The jacking end can pass through the fixed frame 22 to jack the pipe section 3. The other end of the telescopic rod 21 is connected to the fixed frame 22. The fixed frame 22 is provided with a clamping assembly 23 for clamping the pipe section 3.

[0026] During construction, workers can first install the jacking component 1 in the working shaft and place the rear end of the jacking component 1 against the shaft wall of the working shaft, so that the construction position is in front of the jacking component 1. Then, the machine head with the cutter head in the pipe jacking machine is used to excavate along the predetermined axis at the location to be constructed. Subsequently, the staff controlled the jacking assembly 1 to carry out pipe jacking operations, jacking the pipe section 3 that was hoisted into the working shaft towards the excavation position; after the jacking of the pipe section 3 was completed (pushing a part of the pipe section 3 to a specified depth in the soil), the staff controlled the jacking end of the jacking assembly 1 to retract, so as to add a new pipe section 3. During the retraction of the jacking end of the jacking component 1, the telescopic rod 21 is controlled to move, pushing the fixed frame 22 to the position of the pipe section 3 in the soil layer. The clamping component 23 clamps the pipe section 3 in the soil layer to achieve the anti-retraction effect, reducing the retraction of the pipe section 3 in the soil layer and avoiding the need to reposition and jacking the pipe section 3, thus ensuring construction efficiency. At the same time, it can also prevent the position of the pipe section 3 in the soil layer from becoming skewed due to retraction, which would affect the construction quality.

[0027] When it is necessary to advance the next pipe section 3, the new pipe section 3 is hoisted into the slot in the middle of the jacking end and the fixed frame 22, and the jacking end is driven to approach and squeeze the new pipe section 3. When the new pipe section 3 is about to contact the pipe section 3 in the soil layer, the clamping component 23 is controlled to retract, and the end of the clamping component 23 separates from the pipe section 3 in the soil layer. At this time, the new pipe section 3 continues to be jacked until the new pipe section 3 connects with the pipe section 3 in the soil layer. This cycle is repeated to complete the jacking of the pipe section 3.

[0028] In some embodiments, the aforementioned fixed frame 22 is further provided with a camera 221, which can continuously monitor the status of the pipe section 3 in the soil layer. During the retraction of the jacking end of the jacking component 1, the status of the pipe section 3 in the soil layer can be monitored by the camera 221. When the retraction of the pipe section 3 in the soil layer is detected, the workers can use the telescopic rod 21 to push the fixed frame 22 to the position of the pipe section 3 in the soil layer, and clamp the pipe section 3 in the soil layer by the clamping component 23 to achieve the effect of stopping the retraction, reducing the retraction distance of the pipe section 3 in the soil layer, and avoiding the need to reposition and jacking the pipe section 3.

[0029] Preferably, the aforementioned anti-reverse component 2 is equipped with a controller, and the aforementioned camera 221 and telescopic rod 21 are both signal connected to the controller; When camera 221 detects that the pipe section 3 in the soil is retracting, camera 221 will send a retraction signal to the controller. At this time, the controller will control the extension rod 21 to extend, push the fixed frame 22 to the position of the pipe section 3 in the soil, and clamp the pipe section 3 in the soil through the clamping component 23 to achieve the effect of stopping the retraction. The camera 221 and the controller can replace manual monitoring to improve the convenience of using the jacking device that prevents the pipe section from retracting.

[0030] It is worth noting that the controller mentioned above is either a PLC controller or a microcontroller; To enable the telescopic rod 21 to extend rapidly, the telescopic rod 21 is a telescopic cylinder, and the controller is connected to the solenoid valve signal of the telescopic cylinder; When camera 221 detects the retraction of pipe section 3 and sends a retraction signal to the controller, the controller will adjust the valve core of the solenoid valve to allow compressed gas to enter the telescopic cylinder, pushing the actuating end of the telescopic cylinder to move towards the position of pipe section 3 in the soil layer, so as to push the fixed frame 22 to the position of pipe section 3 in the soil layer; the controller controls the action of the telescopic cylinder in the existing technology, and the control method is relatively simple, so it will not be described in detail here.

[0031] In some embodiments, the aforementioned jacking assembly 1 includes a baffle 11, a top plate 12, and a jack assembly 13. See also... Figure 2 ;in, The top plate 12 is mounted on the baffle 11 via the jack assembly 13, and the side of the top plate 12 facing away from the baffle 11 is provided with a jack head 121 for pressing the pipe section 3. During the jacking of pipe section 3, the workers can control the extension of the jack assembly 13 to push the top plate 12 to the construction position, so that the jack head 121 on the top plate 12 can contact the pipe section 3 and push the pipe section 3 to the construction position, thus completing the jacking work of pipe section 3.

[0032] It is worth noting that the aforementioned jack assembly 13 includes multiple hydraulic jacks, which are evenly distributed on the baffle 11 to smoothly push the top plate 12 to move, thereby achieving stable jacking of the pipe section 3.

[0033] In some embodiments, the clamping assembly 23 described above includes two cylinders 231, the fixed ends of which are respectively disposed on two opposite inner sidewalls of the fixing frame 22. (See also...) Figure 3 Both cylinders 231 are equipped with clamping blocks 232 at their actuating ends. These clamping blocks 232 hold the retracting pipe section 3 in the soil layer, thus restricting its position and preventing it from changing position. The positional changes of the pipe section 3 in the soil layer include changes in axial position (retraction) and radial position (skewness). After the pipe section 3 in the soil layer is clamped by the clamping block 232, the changes in the axial and radial positions of the pipe section 3 in the soil layer can be restricted at the same time, so as to better achieve the anti-retraction effect.

[0034] It is worth noting that the jacking device is also equipped with an air compressor. The air outlet of the air compressor is connected to the air inlet of cylinder 231 and the aforementioned telescopic cylinder, and is used to provide power to cylinder 231 and the telescopic cylinder. The model of the air compressor is not limited, as long as it can provide suitable compressed air for cylinder 231 and the telescopic cylinder.

[0035] Preferably, the clamping block 232 mentioned above includes a clamping plate 2321 and a push plate 2322, see [reference]. Figure 4 ;in, The clamping plate 2321 is located at the actuating end of the cylinder 231, and the push plate 2322 is located on the side of the clamping plate 2321 close to the push assembly 1 and on the side of the clamping plate 2321 away from the cylinder 231. The push plate 2322 and the clamping plate 2321 together form an "L" shaped plate structure. When clamping the pipe section 3 in the soil layer, the clamping plate 2321 is located on the side wall of the pipe section 3 in the soil layer, and the top plate 12 is located on the end face of the pipe section 3 in the soil layer. The clamping plate 2321 can prevent the pipe section 3 in the soil layer from changing position in its radial direction. At the same time, the clamping plate 2321 can also prevent the pipe section 3 in the soil layer from changing position in its axial direction. In conjunction with the top plate 12, it can overcome the large active earth pressure (the force that pushes the pipe section 3 in the soil layer back), so as to further improve the back-stopping effect of the back-stopping component 2.

[0036] In some embodiments, the aforementioned anti-reverse component 2 further includes two slide rails 24, see [link to previous document]. Figure 1 Figure 2 and Figure 3 ; Both slide rails 24 are located in front of the jacking assembly 1, and the two slide rails 24 are respectively set on both sides of the jacking assembly 1. The length direction of the slide rails 24 is parallel to the movement direction of the jacking end. The two ends of the fixed frame 22 are respectively slidably set on the two slide rails 24 so that the movement of the fixed frame 22 is more stable and convenient.

[0037] In some embodiments, the aforementioned anti-reverse assembly 2 further includes a support frame 25 for supporting the tube section 3, the support frame 25 being disposed in front of the jacking assembly 1; Before jacking pipe section 3, workers can use hoisting equipment to hoist pipe section 3 and place it on support frame 25; Then, the jacking assembly 1 is used to push the pipe section 3 to move on the support frame 25 to reduce the friction between the pipe section 3 and the soil layer, so as to make the jacking of the pipe section 3 more convenient and thus improve the jacking efficiency of the pipe section 3.

[0038] Preferably, a plurality of support rollers 251 are rotatably arranged on the support frame 25. The plurality of support rollers 251 are arranged at equal intervals along the direction of movement of the pushing end on the support frame 25, and the axis of the support rollers 251 is perpendicular to the direction of movement of the pushing end, so as to reduce the friction between the tube section 3 and the support frame 25, thereby further improving the efficiency of the tube section 3 pushing.

[0039] It is worth noting that the distance between the aforementioned top 121 and the ground is greater than the height of the support frame 25, see [reference]. Figure 2 When the jacking assembly 1 pushes the pipe section 3, the jacking head 121 will not be interfered with by the support frame 25, so as to ensure that the jacking work of the pipe section 3 can proceed smoothly.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A pipe push installation to prevent pipe section back off, characterized by: It includes a jacking component (1) and a backstop component (2); The anti-reverse assembly (2) includes a telescopic rod (21) and a fixed frame (22); one end of the telescopic rod (21) is set on the jacking assembly (1), and the telescopic direction of the telescopic rod (21) is parallel to the action direction of the jacking end of the jacking assembly (1); the fixed frame (22) is an inverted "U" shaped structure, and the fixed frame (22) is slidably set in front of the jacking assembly (1) along the action direction of the jacking end, and the jacking end can pass through the fixed frame (22) to jack the pipe section (3), and the other end of the telescopic rod (21) is connected to the fixed frame (22), and the fixed frame (22) is provided with a clamping assembly (23) for clamping the pipe section (3); after the jacking of the pipe section (3) is completed, the fixed frame (22) is moved to the position of the pipe section (3) by the telescopic rod (21), and the pipe section (3) is clamped by the clamping assembly (23) to achieve the anti-reverse effect.

2. The jacking assembly of claim 1, wherein: The clamping assembly (23) includes two cylinders (231), the fixed ends of the two cylinders (231) are respectively set on the two inner side walls opposite to each other of the fixed frame (22), and the actuating ends of the two cylinders (231) are each provided with a clamping block (232).

3. The jacking assembly of claim 2, wherein: The clamping block (232) includes a clamping plate (2321) and a push plate (2322); The clamping plate (2321) is located at the actuating end of the cylinder (231), and the push plate (2322) is located on the side of the clamping plate (2321) close to the jacking assembly (1) and on the side of the clamping plate (2321) away from the cylinder (231). The push plate (2322) and the clamping plate (2321) together form an "L" shaped plate structure.

4. The jacking assembly of claim 1, wherein: The anti-reverse assembly (2) also includes two slide rails (24); Both slide rails (24) are located in front of the jacking assembly (1), and the two slide rails (24) are respectively set on both sides of the jacking assembly (1). The length direction of the slide rails (24) is parallel to the movement direction of the jacking end. The two ends of the fixed frame (22) are respectively slidably set on the two slide rails (24).

5. The jacking assembly of claim 1, wherein: The anti-reverse assembly (2) also includes a support frame (25) for supporting the pipe section (3), which is located in front of the jacking assembly (1).

6. The jacking assembly of claim 5, wherein: The support frame (25) is rotatably provided with multiple support rollers (251), which are arranged at equal intervals along the direction of movement of the push end, and the axis of the support rollers (251) is perpendicular to the direction of movement of the push end.

7. The jacking assembly of claim 1, wherein: A camera (221) for detecting the status of the pipe section (3) is provided on the fixed frame (22).

8. The jacking assembly of any one of claims 1-7, wherein: The jacking assembly (1) includes a baffle (11), a top plate (12), and a jack assembly (13). The top plate (12) is set on the baffle (11) by the jack assembly (13), and the side of the top plate (12) facing away from the baffle (11) is provided with a jack (121) for squeezing the pipe section (3).

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