A synchronous jack for pipe jacking construction deviation correction

Abstract

The utility model relates to the technical field of jack, especially a synchronous jack for deviation rectification in pipe jacking construction, which comprises a mounting seat, a connecting seat, a supporting frame, a cylinder barrel, a push rod, an oil inlet valve and a sliding block. The connecting seat is movably assembled inside the mounting seat. The upper side of the connecting seat is provided with a boss. A sliding groove is formed in the corresponding position of the sliding block. The sliding block is slidably connected with the boss inside the connecting seat through the sliding groove. The supporting frame is fixedly connected to the top of the sliding block. The left and right sides and the upper and lower sides of the supporting frame are respectively fixedly provided with cylinder barrels. The device is provided with cylinder barrels on the upper and lower sides and the left and right sides of the supporting frame. The cylinder barrels are matched with synchronous oil injection control. The push rod uniformly applies force to the four positions of the pipeline. The pipeline is accurately pushed. The oil cylinders corresponding to the cylinder barrels can be individually controlled. When the pipeline deviates, the corresponding push rod can be adjusted in extension and retraction through the oil cylinder to extract and discharge oil, so that the pipeline deviation can be quickly corrected without the need to adjust the device as a whole. The deviation rectification operation is simplified, and the construction precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of jack technology, and in particular to a synchronous jack for correcting deviation during pipe jacking construction. Background Technology

[0002] In pipe jacking construction, a special device is needed to gradually push the pipe along the channel opened by the pipe jacking machine to the preset position. The core requirement is to ensure the accuracy of the pipe pushing and timely correction after deviation.

[0003] Existing pipeline pushing devices mostly adopt a single-sided or asymmetrical force application structure. During pushing, the pipeline is prone to axial deviation or radial tilting due to the single force application point and uneven force distribution. It is difficult to advance accurately along the preset channel, and frequent pauses in construction are required for adjustment, which affects the laying accuracy and efficiency.

[0004] Meanwhile, for correcting pipeline misalignment, existing devices often require moving the entire device or disassembling and reassembling the force-applying components, making it impossible to adjust the expansion and contraction of individual force-applying units. The correction process is cumbersome, time-consuming, and difficult to achieve precise correction based on the misalignment difference, easily causing secondary deviations and further increasing construction costs and schedule pressure. Utility Model Content

[0005] In order to overcome the shortcomings mentioned in the background art, this utility model provides a synchronous jack for pipe jacking construction to correct deviation.

[0006] The technical solution is as follows: A synchronous jack for pipe jacking construction includes a mounting base, a connecting base, a support frame, a cylinder, a push rod, a spring, an oil outlet valve, an oil inlet valve, and a sliding block. The connecting base is movably mounted inside the mounting base. A boss is provided on the upper side of the connecting base. A corresponding groove is provided on the sliding block. The sliding block is slidably connected to the connecting base through the groove and the boss. A support frame is fixedly connected to the top of the sliding block. Cylinders are fixedly installed on the left and right sides and the top and bottom sides of the support frame. A push rod is slidably connected inside each cylinder. A spring is elastically connected between the rear end of the push rod and the front end of the cylinder. An oil inlet valve is installed on the upper rear side of each cylinder. An oil outlet valve is installed on the lower rear side of each cylinder. The valve ports of the oil outlet valve and the oil inlet valve are sealed and connected to the inner cavity of the cylinder.

[0007] Optionally, the push rod is made of high-strength alloy steel.

[0008] Optionally, the inner wall of the sliding block's groove is provided with a polytetrafluoroethylene wear-resistant coating.

[0009] Optionally, it also includes a first motor, a gear, and a rack. The first motor is installed in the middle of the sliding block, and a gear is installed at the end of the output shaft of the first motor. The gear is located below the sliding block, and a rack is installed on the rear side wall inside the connecting seat. The rack and the gear mesh with each other.

[0010] Optionally, it also includes a second motor, a screw, a movable block, and a rotating frame. The second motor is installed on both the left and right sides of the bottom of the mounting base. The output shaft of the second motor is connected to a screw. The screw is threaded with a movable block. A guide groove is opened at the bottom of the mounting base corresponding to the movable block. The movable block is slidably connected to the guide groove. A rotating frame is hinged on the movable block. The free ends of the two rotating frames are rotatably connected to the two ends of the connecting base through shaft pins.

[0011] Optionally, self-lubricating bearings are provided at the hinges of the rotating frame, the movable block, and the connecting seat. The outer ring of the self-lubricating bearing is fixed to the rotating frame, and the inner ring is fixed to the pin.

[0012] The beneficial effects are: 1. The device uses cylinders set on the upper and lower sides and left and right sides of the support frame, combined with synchronous oil injection control, to make the push rod apply force evenly to the four positions of the pipeline, accurately push the pipeline, and each cylinder can be controlled independently. When the pipeline deviates, the corresponding push rod can be adjusted by pumping oil from the cylinder to quickly correct the pipeline deviation. There is no need to adjust the whole device, simplifying the correction operation and improving the construction accuracy.

[0013] 2. With the help of the gear and rack structure driven by the first motor, the sliding block can be finely adjusted to drive the lateral displacement of the cylinder, ensuring that the cylinder is aligned with the jacking channel; through the screw and rotating frame structure controlled by the second motor, the height of the connecting seat can be adjusted, the cylinder levelness can be corrected, adapting to different construction ground environments and ensuring the reference accuracy of the device. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a cross-sectional view of the cylinder component of this utility model.

[0016] Figure 3 This is a cross-sectional view of the mounting base, connecting base, and sliding block components of this utility model.

[0017] Figure 4 This is a cross-sectional view of the mounting base and connecting base components of this utility model.

[0018] The components in the attached diagram are labeled as follows: 1_Mounting base, 2_Connecting base, 3_Support frame, 4_Cylinder, 5_Push rod, 6_Spring, 7_Outlet valve, 8_Inlet valve, 9_Sliding block, 10_First motor, 11_Gear, 12_Rack, 13_Second motor, 14_Screw, 15_Moving block, 16_Rotating frame. Detailed Implementation

[0019] Example: A synchronous jack for correcting deviation during pipe jacking construction, such as... Figures 1-3As shown, the device includes a mounting base 1, a connecting base 2, a support frame 3, a cylinder 4, a push rod 5, a spring 6, an oil outlet valve 7, an oil inlet valve 8, and a sliding block 9. The connecting base 2 is movably mounted inside the mounting base 1, forming an adjustable connection with the mounting base 1. A boss is provided on the upper side of the inside of the connecting base 2, and a corresponding groove is provided on the sliding block 9. The sliding block 9 is slidably connected inside the connecting base 2 through the groove and the boss. The inner wall of the groove of the sliding block 9 is coated with a polytetrafluoroethylene wear-resistant coating, which reduces frictional wear between the sliding block 9 and the boss of the connecting base 2, making the lateral adjustment of the sliding block 9 smoother. The top of the moving block 9 is bolted to a support frame 3. Cylinders 4 are fixedly installed on the left and right sides and the top and bottom sides of the support frame 3. Each cylinder 4 is sealed and slidably connected to a push rod 5. The push rod 5 is made of high-strength alloy steel and can withstand the large pressure during the pushing process to avoid deformation. A spring 6 is elastically connected between the rear end of the push rod 5 and the front end of the cylinder 4. An oil inlet valve 8 is installed on the upper rear side of the cylinder 4, and an oil outlet valve 7 is installed on the lower rear side of the cylinder 4. The valve ports of the oil outlet valve 7 and the oil inlet valve 8 are sealed and connected to the inner cavity of the cylinder 4 to form an oil flow channel.

[0020] like Figure 3 As shown, it also includes a first motor 10, a gear 11 and a rack 12. The first motor 10 is bolted to the middle of the sliding block 9. The gear 11 is coaxially connected to the end of the output shaft of the first motor 10. The gear 11 is located below the sliding block 9. The rack 12 is screwed to the rear side wall inside the connecting seat 2. The rack 12 and the gear 11 mesh with each other. Through the meshing of the gear 11 and the rack 12, the sliding block 9 can be forced to achieve lateral displacement adjustment along the boss of the connecting seat 2.

[0021] like Figure 4 As shown, it also includes a second motor 13, a screw 14, a movable block 15, and a rotating frame 16. The second motor 13 is bolted to both the left and right sides of the bottom of the mounting base 1. The output shaft of the second motor 13 is connected to the screw 14, and the movable block 15 is threaded onto the screw 14. A guide groove is provided at the bottom of the mounting base 1 corresponding to the movable block 15. The movable block 15 is slidably connected to the guide groove. The rotating frame 16 is hinged to the movable block 15. The free ends of the two rotating frames 16 are rotatably connected to the left and right ends of the connecting base 2 through shaft pins. Self-lubricating bearings are provided at the hinge points of the rotating frame 16, the movable block 15, and the connecting base 2. The outer ring of the self-lubricating bearing is fixed to the rotating frame 16, and the inner ring is fixed to the pin. This can reduce friction at the hinge points, make the rotating frame 16 rotate more flexibly, and ensure the convenience and accuracy of horizontal angle calibration.

[0022] During pipe jacking construction, the "working well" and "receiving well" required for pipe jacking operations are excavated in advance on the construction ground. The pipe jacking machine first excavates to form an underground jacking channel. The device is placed at the preset installation position outside the jacking channel opening, ensuring that the mounting base 1 is relatively fixed to the ground. A corresponding oil cylinder is installed on each cylinder 4. The oil injection end of the oil cylinder is sealed to the oil inlet valve 8 of the cylinder 4, and the oil return end of the oil cylinder is sealed to the oil outlet valve 7 of the cylinder 4, ensuring that each oil cylinder can independently control the oil inlet and outlet of the corresponding cylinder 4, thereby independently controlling the extension and retraction of the push rod 5, and then adjusting the position of the device.

[0023] When it is necessary to adjust the lateral position of the device, start the first motor 10 and control its output shaft to rotate in the forward or reverse direction, driving the gear 11 to rotate synchronously. Since the rack 12 is fixed to the inner rear side wall of the connecting seat 2 and the mounting seats 1 are fixed to the ground and remain stationary, the gear 11 is driven by the meshing reaction force of the rack 12 to drive the first motor 10 and the sliding block 9 to make a lateral linear displacement along the boss, synchronously driving the support frame 3 and the cylinder 4 to move until the axis of the cylinder 4 is parallel to the axis of the jacking channel. Then, turn off the first motor 10 to complete the lateral calibration.

[0024] If the ground is uneven, the second motor 13 on the corresponding side needs to be started according to the horizontal offset angle of the cylinder 4. The output shaft of the second motor 13 drives the screw 14 to rotate, causing the movable block 15 to move laterally closer to or away from the center of the mounting seat 1 along the guide groove. If the movable block 15 moves outward, it pushes the corresponding rotating frame 16 to rotate around the hinge point. Using the shaft pin of the other rotating frame 16 and the connecting seat 2 as the fulcrum, it pushes the corresponding end of the connecting seat 2 to rise or fall until the cylinder 4 is in a horizontal state. Then, the second motor 13 is turned off to complete the horizontal calibration.

[0025] Next, the pipeline jacking operation is carried out. All hydraulic cylinders are activated simultaneously. Pressurized hydraulic fluid is injected into the cylinder 4 through the inlet valve 8. The hydraulic pressure overcomes the elastic force of the spring 6, pushing the push rod 5 to slide along the axis of the cylinder 4 towards the pipeline. The spring 6 is compressed, and the four push rods 5 apply uniform thrust to four symmetrical positions on the pipeline, precisely pushing the pipeline along the jacking channel. If the pipeline deviates during the jacking process, the corresponding hydraulic cylinder is independently controlled according to the direction and amount of deviation. If it is necessary to shorten a push rod 5 on one side, the corresponding hydraulic cylinder is controlled to retract into the cylinder 4 through the outlet valve 7. The oil, under the elastic restoring force of the spring 6, drives the push rod 5 to retract away from the pipeline along the axis of the cylinder 4 until the pipeline deviation is corrected. When it is necessary to extend the push rod 5 on a certain side, the corresponding oil cylinder is controlled to replenish the oil through the oil inlet valve 8, pushing the push rod 5 to extend further to achieve precise correction. After the pipeline section is pushed, all oil cylinders are controlled to withdraw the oil, so that each push rod 5 is shortened and reset synchronously under the action of the spring 6. The next section of pipeline to be pushed is spliced, and the above calibration, pushing and correction steps are repeated until the pipeline is pushed from the working well to the receiving well, completing the underground pipeline laying.

Claims

1. A synchronous jack for correcting deviation during pipe jacking construction, characterized in that, The assembly includes a mounting base (1), a connecting base (2), a support frame (3), a cylinder (4), a push rod (5), a spring (6), an oil outlet valve (7), an oil inlet valve (8), and a sliding block (9). The mounting base (1) is movably fitted with the connecting base (2). The upper side of the connecting base (2) has a boss. The sliding block (9) has a corresponding groove. The sliding block (9) is slidably connected to the connecting base (2) through the groove and the boss. The top of the sliding block (9) is fixedly connected to the support frame. (3) Cylinders (4) are fixedly installed on the left and right sides and the top and bottom sides of the support frame (3). Each cylinder (4) is sealed and slidably connected to a push rod (5). A spring (6) is elastically connected between the rear end of the push rod (5) and the front end of the cylinder (4). An oil inlet valve (8) is installed on the upper rear side of the cylinder (4). An oil outlet valve (7) is installed on the lower rear side of the cylinder (4). The valve ports of the oil outlet valve (7) and the oil inlet valve (8) are sealed and connected to the inner cavity of the cylinder (4).

2. The synchronous jack for correcting deviation during pipe jacking construction according to claim 1, characterized in that, The push rod (5) is made of high-strength alloy steel.

3. The synchronous jack for correcting deviation during pipe jacking construction according to claim 2, characterized in that, The inner wall of the sliding block (9) is provided with a polytetrafluoroethylene wear-resistant coating.

4. The synchronous jack for correcting deviation during pipe jacking construction according to claim 3, characterized in that, It also includes a first motor (10), a gear (11) and a rack (12). The first motor (10) is installed in the middle of the sliding block (9). The gear (11) is installed at the end of the output shaft of the first motor (10). The gear (11) is located below the sliding block (9). The rack (12) is installed on the rear side wall inside the connecting seat (2). The rack (12) and the gear (11) mesh with each other.

5. The synchronous jack for correcting deviation during pipe jacking construction according to claim 4, characterized in that, It also includes a second motor (13), a screw (14), a movable block (15) and a rotating frame (16). The second motor (13) is installed on both the left and right sides of the bottom of the mounting base (1). The output shaft of the second motor (13) is connected to a screw (14). The movable block (15) is threaded onto the screw (14). A guide groove is provided at the bottom of the mounting base (1) corresponding to the movable block (15). The movable block (15) is slidably connected to the guide groove. The rotating frame (16) is hinged on the movable block (15). The free ends of the two rotating frames (16) are rotatably connected to the two ends of the connecting seat (2) through shaft pins.

6. A synchronous jack for correcting deviation during pipe jacking construction according to claim 5, characterized in that, Self-lubricating bearings are provided at the hinges of the rotating frame (16), the movable block (15), and the connecting seat (2). The outer ring of the self-lubricating bearing is fixed to the rotating frame (16), and the inner ring is fixed to the pin.

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