Intermediate jacking station of pipe jacking machine

Abstract

The invention discloses a pipe jacking machine intermediate jacking station, which belongs to the field of pipe jacking machines, and mainly comprises a left lantern ring, a right lantern ring, an inner ring and a control oil cylinder, the control oil cylinder comprises a cylinder body and a control ring, and the control ring can slide between a left position and a right position; when the control ring moves from the left position to the right position, the control ring drives the inner ring to rotate relative to the right lantern ring. When the control ring moves from the right position to the left position, the inner ring does not rotate; when the control ring is located at the left position, the cylinder body and the inner ring are connected through the control ring; when the control ring is located at the right position, the cylinder body is separated from the inner ring; the control oil cylinder can be rapidly installed, and bolts are not needed; the disassembly of the oil cylinder is controlled at a low position, so that workers do not need to climb to a high position, the working risk is reduced, hoisting equipment is not needed, the cost is reduced, and the efficiency is improved; the control oil cylinder is not far away after being detached, so that a hose does not need to be detached, manpower is saved, and oil pollution and resource amount cost are avoided; disassembly of the control oil cylinder can be completed through work of a hydraulic system, manpower is saved, and control is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe jacking machines, and in particular relates to a relay room of a pipe jacking machine. Background Art

[0002] Pipe jacking technology is an advanced underground pipeline construction process. Its core is to use hydraulic power to push the pipe jacking machine and the pipe segments to be laid forward, one segment at a time, into the receiving well without excavating the surface. With the acceleration of urbanization in my country, pipe jacking technology has been widely used in the construction of underground pipelines for urban water supply and drainage, gas, electricity, and communications, as well as in highway and railway tunnels.

[0003] During long-distance pipe jacking, as the jacking distance increases, the rearward jacking force gradually fails to meet the power requirements of the tunnel boring machine. To address this problem, construction companies usually pre-install relay chambers in the pipe sections to provide additional power support. After the pipe jacking is completed, the workers will remove the oil cylinders on the relay chambers for recycling. However, in existing technologies, the removal of the oil cylinders encounters the following problems: 1. In existing relay rooms, the oil cylinder is generally fixed inside the relay room using bolts and clamps. During disassembly, workers need to use tools to rotate the bolts and remove the clamps from the relay room before they can remove the oil cylinder. This method consumes a lot of manpower. 2. Due to the large inner diameter of the relay room, workers need to use ladders to climb up to the height to dismantle the oil cylinder located at a high place, which increases the work risk for workers. After dismantling, the oil cylinder needs to be transported to the ground using lifting equipment, which further increases safety risks and costs. 3. Since the oil cylinders need to be disassembled one by one, the connecting hoses between the oil cylinders need to be disassembled before disassembly. This not only consumes a lot of manpower, but the oil in the hoses will also flow out and cause waste of resources and environmental pollution. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a pipe jacking machine relay room.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pipe jacking machine relay room, comprising a left sleeve, a right sleeve, an inner ring and a control oil cylinder; the left sleeve is sleeved on the right sleeve; the inner ring is rotatably connected in the right sleeve; a plurality of control oil cylinders are provided, which are evenly distributed in the inner ring along the circumferential direction; the control oil cylinder comprises a cylinder body and a control ring, the right side of the cylinder body is tightly attached to the right sleeve, the control ring is slidably connected to the cylinder body, and the control ring can slide between a left position and a right position; when the control ring moves from the left position to the right position, the control ring drives the inner ring to rotate relative to the right sleeve; when the control ring moves from the right position to the left position, the inner ring does not rotate; when the control ring is in the left position, the control ring limits the cylinder body, and the cylinder body cannot move relative to the inner ring; when the control ring is in the right position, the cylinder body and the inner ring are separated.

[0006] Preferably, the control oil cylinder also includes a control pin, a telescopic pin and a telescopic spring; a plurality of ring grooves are evenly distributed on the inner ring in the circumferential direction; a special-shaped internal thread is provided in the right sleeve, the left side of the special-shaped internal thread is a vertical surface, and the right side is an inclined surface; the control pin is fixedly connected to the control ring; the telescopic pin is axially slidably connected to the control pin, the telescopic pin is slidably connected to the ring groove, and the telescopic pin extends into the special-shaped internal thread; the telescopic spring is arranged in the telescopic pin to drive the telescopic pin to move in the direction close to the special-shaped internal thread.

[0007] Preferably, when the control ring moves from the left position to the right position, the telescopic pin abuts against the vertical surface, and the telescopic pin drives the inner ring to rotate; when the control ring moves from the right position to the left position, the telescopic pin abuts against the inclined surface, and the inclined surface pushes the telescopic pin to overcome the sliding of the telescopic spring, so that the telescopic pin can pass over the special-shaped internal thread, and the inner ring does not rotate.

[0008] Preferably, a plurality of fixing plates are evenly distributed in the circumferential direction inside the inner ring, the fixing plates and the control oil cylinders correspond one to one, and two fixing holes are symmetrically provided on the fixing plate with the center line as the axis; two fixing rods are symmetrically provided on the control ring with the center line as the axis; when the control ring is in the left position, the control ring and the right side of the fixing plate are tightly attached, the fixing rods extend into the fixing holes, and the cylinder body is limited so that it cannot move relative to the inner ring; when the control ring is in the right position, the control ring is away from the fixing plate, the fixing rods exit the fixing holes, and the cylinder body and the inner ring are separated.

[0009] Preferably, the control oil cylinder also includes a small piston, a connecting piston, a steel ball, and a connecting spring; a small piston hole is provided in the cylinder body along the left and right directions; the small piston is slidably arranged in the small piston hole, and the small piston hole is divided into a small piston chamber and a small piston rod chamber, the small piston rod chamber is connected to the atmosphere, a small piston rod is provided on the right side of the small piston, the right end of the small piston rod extends out of the small piston rod chamber and is fixedly connected to the control ring, and a side hole is provided in the radial direction on the small piston; the connecting piston is axially slidably connected to the small piston, a left piston chamber is formed between the left side of the connecting piston and the small piston, a right piston chamber is formed between the right side of the connecting piston and the small piston, the left piston chamber and the small piston chamber are connected, the right piston chamber and the small piston rod chamber are connected, and a piston annular groove is provided on the connecting piston; the connecting spring is arranged in the right piston chamber to drive the connecting piston to move left; a cylinder annular groove is also provided in the cylinder body; the steel ball is slidably arranged in the side hole, and the steel ball alternately extends into the piston annular groove and the cylinder annular groove.

[0010] Preferably, the control oil cylinder also includes a large piston and a large piston rod; a large piston hole is provided in the cylinder body along the left and right directions; the large piston is slidably arranged in the large piston hole, and the large piston hole is divided into a large piston cavity and a large piston rod cavity, and a port A is provided on the cylinder body, and the port A is connected to the large piston cavity; the large piston rod is slidably arranged on the left side of the cylinder body, and the right end of the large piston rod extends into the large piston rod cavity and is fixedly connected to the large piston.

[0011] Preferably, the control oil cylinder also includes a valve core and a torsion spring; a limit block is provided on the cylinder body, and a C port and a B port are respectively provided on the front and rear sides of the cylinder body; the valve core is rotatably connected to the cylinder body, a valve core flow channel is provided in the valve core, a valve core handle is provided at the upper end of the valve core, and a valve core groove is provided on the outer circumferential wall of the valve core, and the valve core can rotate between a first position, a second position and a third position; the torsion spring is arranged in the cylinder body to drive the valve core to rotate in the direction of the valve core handle close to the limit block.

[0012] Preferably, when the valve core is in the first position, the valve core flow channel connects the B port, the C port and the large piston rod chamber; when the valve core is in the second position, the valve core flow channel connects the B port, the C port, the small piston chamber and the large piston rod chamber; when the valve core is in the third position, the valve core flow channel connects the B port, the small piston chamber and the large piston rod chamber.

[0013] Preferably, the control oil cylinder also includes a positioning rod and a positioning spring; the positioning rod is slidably connected to the cylinder body along the left and right directions, the left end of the positioning rod can be extended into the valve core groove, and the right end of the positioning rod is radially provided with a rod pin, and the rod pin extends into the small piston rod cavity; the positioning spring is arranged in the cylinder body to drive the positioning rod to move to the left.

[0014] Compared with the prior art, the advantages of the present invention are: 1. By setting the control ring and the fixing rod, when the control ring moves to the left position, the steel ball connects the small piston and the cylinder body together, so that the control ring and the cylinder body cannot move relative to each other. In addition, due to the fixing rod inserted into the fixing hole and the limiting effect of the right collar, the control cylinder cannot move relative to the inner ring, realizing the quick installation of the control cylinder without the use of bolts, which is simple and quick.

[0015] 2. By setting the telescopic pin and the special-shaped internal thread, when the control ring moves from the left position to the right, the control ring drives the telescopic pin to slide along the ring groove, so that the telescopic pin and the special-shaped internal thread cooperate, and the inner ring is driven to rotate by the telescopic pin, thereby driving the next control cylinder to the lowest point position, and when the control ring reaches the right position, the fixing rod exits the fixing hole, and the control cylinder and the inner ring are separated, so that the control cylinders can be driven to the lowest point in turn by the inner ring, so that the disassembly of the control cylinders can be carried out at a low place, and workers do not need to climb to a high place, thereby reducing the work risks of workers and the need to use lifting equipment, thereby reducing costs and improving efficiency.

[0016] 3. By setting the telescopic pin and the special-shaped internal thread, the inner ring is controlled to rotate during the disassembly process, driving the control cylinder to the lowest point in turn. Since the cylinders are removed in turn and do not need to be removed after removal, there is no need to remove the connecting hose before disassembling the control cylinder, saving manpower, avoiding oil pollution and waste of resources.

[0017] 4. By setting the valve core and rotating the valve core to change the oil circuit in the control cylinder, when disassembling, it is only necessary to turn the valve core to the third position, and then control the hydraulic system to output high-pressure oil to complete the disassembly of the control cylinder. There is no need for workers to use disassembly tools to remove the bolts, saving manpower consumption and convenient control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of the present invention; Figure 2 For the present invention Figure 1 Cross-sectional view in the AA direction; Figure 3 For the present invention Figure 1 Enlarged view at point I in the middle; Figure 4 For the present invention Figure 3 Cross-sectional view in the middle BB direction; Figure 5 for the present invention Figure 3 in the C-C direction; Figure 6 for the present invention Figure 3 in the D-D direction; Figure 7 for the present invention Figure 3 in the E-E direction; Figure 8 for the present invention Figure 3 in the II direction; Figure 9 for the present invention Figure 8 in the F-F direction; Figure 10 for the present invention DETAILED DESCRIPTION

[0019] The present invention will be further described in conjunction with the accompanying drawings.

[0020] In conjunction with Figures 1-10 shown, a pipe jacking machine relay, the embodiment includes a left collar 1, right collar 2, inner ring 4 and control cylinder; the left collar 1 is sleeved on the right collar 2; the inner ring 4 is rotatably connected in the right collar 2; the control cylinder is provided with a plurality of, respectively, along the circumferential direction is distributed in the inner ring 4; the control cylinder includes cylinder body 10 and control ring 16, the right side of the cylinder body 10 and the right collar 2 closely, the control ring 16 is slidably connected on the cylinder body 10, the control ring 16 can slide between the left and right positions; when the control ring 16 moves from the left to the right, the control ring 16 drives the inner ring 4 to rotate relative to the right collar 2; when the control ring 16 moves from the right to the left, the inner ring 4 does not rotate; when the control ring 16 is in the left position, the control ring 16 limits the cylinder body 10, the cylinder body 10 cannot move relative to the inner ring 4; when the control ring 16 is in the right position, the cylinder body 10 and the inner ring 4 are separated.

[0021] In the embodiment, when the control ring 16 moves from the left to the right, the inner ring 4 is driven to rotate relative to the right collar 2 by the control ring 16, so that the control cylinder mounted on the inner ring 4 can be transported downward, without workers climbing to a high place to disassemble, nor using hoisting equipment; when the control ring 16 moves from the right to the left, the inner ring 4 does not rotate; when the control ring 16 is in the left position, the control ring 16 limits the cylinder body 10, so that the cylinder body 10 cannot move relative to the inner ring 4; when the control ring 16 is in the right position, the cylinder body 10 and the inner ring 4 are separated; the installation of the control cylinder does not use bolts, and the installation and disassembly are quick and convenient.

[0022] In conjunction with Figure 1-Figure 3 , Figure 5 , Figure 10As shown, the control cylinder also includes a control pin 17, a telescopic pin 18 and a telescopic spring 19; a plurality of ring grooves 5 are evenly distributed on the inner ring 4 along the circumferential direction; a special-shaped internal thread 3 is provided in the right sleeve 2, the left side of the special-shaped internal thread 3 is a vertical surface, and the right side is an inclined surface; the control pin 17 is fixedly connected to the control ring 16; the telescopic pin 18 is slidably connected to the control pin 17 along the axial direction, the telescopic pin 18 is slidably connected to the ring groove 5, and the telescopic pin 18 extends into the special-shaped internal thread 3; the telescopic spring 19 is arranged in the telescopic pin 18 to drive the telescopic pin 18 to move in the direction close to the special-shaped internal thread 3.

[0023] Combine Figure 1-Figure 3 、 Figure 5 、 Figure 10 As shown, when the control ring 16 moves from the left position to the right position, the telescopic pin 18 abuts against the vertical surface, and the telescopic pin 18 drives the inner ring 4 to rotate; when the control ring 16 moves from the right position to the left position, the telescopic pin 18 abuts against the inclined surface, and the inclined surface pushes the telescopic pin 18 to overcome the telescopic spring 19 to slide, so that the telescopic pin 18 can pass over the special-shaped internal thread 3, and the inner ring 4 does not rotate.

[0024] Combine Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 As shown, multiple fixing plates 6 are evenly distributed in the circumferential direction inside the inner ring 4, and the fixing plates 6 correspond to the control cylinders one by one. Two fixing holes 7 are symmetrically provided on the fixing plate 6 with the center line as the axis; two fixing rods 20 are symmetrically provided on the control ring 16 with the center line as the axis; when the control ring 16 is in the left position, the control ring 16 and the right side of the fixing plate 6 are tightly attached, the fixing rods 20 extend into the fixing holes 7, and the cylinder body 10 is limited so that it cannot move relative to the inner ring 4; when the control ring 16 is in the right position, the control ring 16 is away from the fixing plate 6, the fixing rods 20 exit the fixing holes 7, and the cylinder body 10 and the inner ring 4 are separated.

[0025] Combine Figure 1 、 Figure 3 、 Figure 8As shown, the control cylinder also includes a small piston 21, a connecting piston 26, a steel ball 28, and a connecting spring 29; a small piston hole is provided in the cylinder body 10 along the left and right directions; the small piston 21 is slidably arranged in the small piston hole, and the small piston hole is divided into a small piston cavity 13 and a small piston rod cavity 14, the small piston rod cavity 14 is connected to the atmosphere, a small piston rod 22 is provided on the right side of the small piston 21, the right end of the small piston rod 22 extends out of the small piston rod cavity 14 and is fixedly connected to the control ring 16, a side hole 23 is provided in the radial direction on the small piston 21; the connecting piston 26 is axially slidably connected to the small piston 21, A left piston chamber 25 is formed between the left side of the connecting piston 26 and the small piston 21, and a right piston chamber 24 is formed between the right side of the connecting piston 26 and the small piston 21. The left piston chamber 25 is connected to the small piston chamber 13, and the right piston chamber 24 is connected to the small piston rod chamber 14. A piston annular groove 27 is provided on the connecting piston 26; a connecting spring 29 is provided in the right piston chamber 24 to drive the connecting piston 26 to move to the left; a cylinder annular groove 38 is also provided in the cylinder body 10; a steel ball 28 is slidably set in the side hole 23, and the steel ball 28 alternately extends into the piston annular groove 27 and the cylinder annular groove 38.

[0026] In this embodiment, when the control ring 16 is in the left position, the fixing rod 20 extends into the fixing hole 7, and the side hole 23 is aligned with the cylinder annular groove 38. Under the action of the connecting spring 29, the connecting piston 26 is pushed to the left, and the steel ball 28 exits the piston annular groove 27 and enters the cylinder annular groove 38, fixing the small piston 21 and the cylinder body 10 so that the control cylinder and the inner ring 4 cannot move relative to each other; when the control ring 16 is in the right position, the side hole 23 and the piston annular groove 27 are aligned, and the steel ball 28 extends into the piston annular groove 27, connecting the connecting piston 26 and the small piston 21 together, and at this time the fixing rod 20 exits the fixing hole 7, and the control cylinder and the inner ring 4 are separated; thereby realizing the rapid installation and disassembly of the control cylinder.

[0027] Combine Figures 1-4 As shown, the control cylinder also includes a large piston 8 and a large piston rod 9; a large piston hole is provided in the cylinder body 10 along the left and right directions; the large piston 8 is slidably set in the large piston hole, and the large piston hole is divided into a large piston cavity 11 and a large piston rod cavity 12, and a port A is provided on the cylinder body 10, and the port A is connected to the large piston cavity 11; the large piston rod 9 is slidably set on the left side of the cylinder body 10, and the right end of the large piston rod 9 extends into the large piston rod cavity 12 and is fixedly connected to the large piston 8.

[0028] Combine Figure 1 、 Figure 3 、 Figure 7 、 Figure 8As shown, the control cylinder further comprises a spool 30 and a torsion spring 34; the cylinder body 10 is provided with a limit block 15, and the cylinder body 10 is provided with a C port and a B port on the front and back sides respectively; the spool 30 is rotationally connected in the cylinder body 10, the spool 30 is provided with a spool flow channel 31, the upper end of the spool 30 is provided with a spool handle 32, the outer circumferential wall of the spool 30 is provided with a spool groove 33, and the spool 30 can rotate between a first position, a second position and a third position; the torsion spring 34 is arranged in the cylinder body 10 to drive the spool 30 to rotate in the direction of approaching the limit block 15.

[0029] In combination Figure 1 , Figure 3 , Figure 7 , Figure 8 As shown, when the spool 30 is in the first position, the spool flow channel 31 connects the B port, the C port and the large piston rod cavity 12; when the spool 30 is in the second position, the spool flow channel 31 connects the B port, the C port, the small piston cavity 13 and the large piston rod cavity 12; when the spool 30 is in the third position, the spool flow channel 31 connects the B port, the small piston cavity 13 and the large piston rod cavity 12.

[0030] In this embodiment, the oil passage connection relationship in the control cylinder is changed by rotating the spool 30, so that when disassembling, the control cylinder can be disassembled by rotating the spool 30 to the third position and then controlling the hydraulic system to output high-pressure oil, without the need for workers to use tools to disassemble the bolts, saving labor consumption and being convenient to control.

[0031] In combination Figure 1 , Figure 3 , Figure 6 , Figure 8 As shown, the control cylinder further comprises a positioning rod 35 and a positioning spring 37; the positioning rod 35 is slidingly connected in the cylinder body 10 along the left-right direction, the left end of the positioning rod 35 can extend into the spool groove 33, the right end of the positioning rod 35 is provided with a rod pin 36 in the radial direction, and the rod pin 36 extends into the small piston rod cavity 14; the positioning spring 37 is arranged in the cylinder body 10 to drive the positioning rod 35 to move to the left.

[0032] In combination Figure 1-Figure 3 , Figure 7 As shown, the relay station further comprises a hydraulic system, the hydraulic system comprises a first oil port and a second oil port, the first oil port is in communication with all the A ports, the left collar 1 is selectively connected with a three-way joint 39, the third interface of the three-way joint 39 is in communication with the second oil port; in adjacent two control cylinders, the C port of the former control cylinder and the B port of the latter control cylinder are in communication through a hose, the B port of the control cylinder located on the front side of the three-way joint 39 is in communication with the first interface of the three-way joint 39, and the C port of the control cylinder located on the rear side of the three-way joint 39 is in communication with the second interface of the three-way joint 39.

[0033] The working principle of the relay station of the pipe jacking machine is as follows: In the process of assembling the pipe jacking machine relay, when the control cylinder needs to be installed in the pipe jacking machine relay, at this time the right sleeve 2 is placed on the ground, the inner ring 4 is rotationally connected in the right sleeve 2, the cylinder body 10 is placed in the right sleeve 2, and the fixing rod 20 and the fixing hole 7 are aligned. The extension pin 18 is inserted into the ring sliding groove 5, and under the action of the extension spring 19, the extension pin 18 is deeply inserted into the special-shaped internal thread 3. The valve core handle 32 is rotated by 180 degrees against the torsional spring 34, the valve core 30 is rotated to the second position, the valve core flow passage 31 is connected with the B port, the C port, the small piston cavity 13, and the large piston rod cavity 12, then the control ring 16 is pushed to move from the right position to the left position, the small piston rod 22 is retracted, the small piston 21 is pushed to move to compress the small piston cavity 13, and the fixing rod 20 is extended into the fixing hole 7. At the same time, due to the sliding of the control ring 16, the extension pin 18 is driven to slide along the ring sliding groove 5 through the control pin 17, so that the extension pin 18 and the inclined surface of the special-shaped internal thread 3 abut, and under the action of the inclined surface of the special-shaped internal thread 3, the extension pin 18 is pushed to retract against the extension spring 19, so as to pass the thread of the special-shaped internal thread 3. When the small piston 21 enters the bottom of the small piston cavity 13, the control ring 16 and the fixing plate 6 are tightly attached, the control ring 16 comes to the left position, at this time the side hole 23 and the cylinder body annular groove 38 are aligned, under the action of the connecting spring 29, the connecting piston 26 is pushed to move, so that the steel ball 28 exits the piston annular groove 27 and enters the cylinder body annular groove 38, thereby connecting the small piston 21 and the cylinder body 10 through the steel ball 28, and the control ring 16 and the cylinder body 10 cannot move relative to each other. Since the right side of the cylinder body 10 and the right sleeve 2 are tightly attached, the control cylinder is limited and cannot move relative to the inner ring 4. The valve core handle 32 is loosened, the valve core 30 is rotated under the action of the torsional spring 34, and when the valve core handle 32 and the limiting block 15 touch, the valve core 30 returns to the first position, and the installation of one control cylinder is completed. The above installation method is repeated, and after all the control cylinders are installed on the inner ring 4, the A ports of all the control cylinders are connected with the first oil port of the hydraulic system through a hose. In the adjacent two control cylinders, the C port of the front control cylinder and the B port of the rear control cylinder are connected through a hose. The control cylinders located on both sides of the three-way joint 39 are connected with the first interface and the second interface of the three-way joint 39 through a hose, respectively. The third interface of the three-way joint 39 and the second oil port of the hydraulic system are connected through a hose, and the oil circuit connection of the pipe jacking machine relay is completed. Then the left sleeve 1 is sleeved on the right sleeve 2, and the assembly is completed.

[0034] When the pipe jacking machine relay room is installed in the pipeline for use, the control oil cylinder on the front side of the tee 39 needs to be placed at the lowest side. When the pipe jacking machine relay room is needed to perform pipe jacking, the hydraulic system is first started to make the high-pressure oil flow out from the first oil port and enter the A port. The high-pressure oil enters the large piston chamber 11 through the A port, thereby pushing the large piston 8 to move to the left, compressing the large piston rod chamber 12, and making the oil in the large piston rod chamber 12 flow into the tee 39 through the valve core flow channel 31, the B port or the C port, and then flow back to the hydraulic system through the tee 39 and the second oil port. As the large piston 8 moves, the large piston rod 9 is pushed out, thereby pushing the left collar 1 to move to the left, pushing the left The side pipe section moves to the left to complete the pipe jacking action; after completing the pipe jacking, start the pipe jacking equipment on the right pipeline in the relay room of the pipe jacking machine, push the right pipe section to move to the left, push the right sleeve 2 to move to the left, and since the left sleeve 1 does not move, the large piston rod 9 is pushed to contract, driving the large piston 8 to move, squeezing the large piston cavity 11, so that the oil therein flows back to the hydraulic system through port A and the first oil port. At the same time, the large piston rod cavity 12 expands, and the oil in the hydraulic system is sucked into the large piston rod cavity 12 through the second oil port, tee 39, port B or port C, and valve core flow channel 31. When the left sleeve 1 and the right sleeve 2 are close together, the pipe jacking work in the relay room of the pipe jacking machine is completed.

[0035] After the pipeline is laid, the control cylinder needs to be disassembled. First, the C port of the control cylinder on the rear side of the tee 39 and the second interface of the tee 39 need to be disconnected, and then the C port and the second interface here are respectively blocked, and then the hydraulic system is started to make the high-pressure oil flow out from the second oil port and enter the tee 39. The hydraulic oil enters the large piston rod cavity 12 through the tee 39, the B port or the C port, and the valve core flow channel 31, pushing the large piston 8 to drive the large piston rod 9 to fully retract, and making the oil in the large piston cavity 11 flow back to the hydraulic system through the first oil port. When all the control cylinders are fully retracted, rotate the valve core handle 32 on the lowest control cylinder to make the valve core 30 overcome the torsion spring 34 and rotate 270 degrees, and the valve core 30 comes to the third position. The valve core groove 33 and the positioning rod 35 are aligned. Under the action of the positioning spring 37, the positioning rod 35 is pushed into the valve core groove 33, and the valve core 30 is positioned in the third position. The B port, the small piston chamber 13 and the large piston rod chamber 12 are connected through the valve core flow channel 31, and then the hydraulic system is controlled to pass high-pressure oil into the three-way 39. The oil enters the small piston chamber 13 of the lowermost control cylinder. Since the C port and the valve core flow channel 31 are disconnected in this control cylinder, the oil will not enter the subsequent control cylinder. After the oil enters the small piston chamber 13, it enters the left piston chamber 25, overcomes the connecting spring 29 and pushes the connecting piston 26 to move. When the piston annular groove 27 and the side hole 23 are aligned, the steel ball 28 exits the cylinder annular groove 38 and enters The piston annular groove 27 releases the small piston 21 from its position, and the oil pushes the small piston 21 to move to the right. The small piston rod 22 extends, pushing the control ring 16 to move from the left position to the right position, thereby driving the telescopic pin 18 to move to the right along the ring slide groove 5 through the control column pin 17, so that the telescopic pin 18 contacts the vertical surface of the special-shaped internal thread 3. Through the cooperation of the telescopic pin 18 and the vertical surface, the inner ring 4 is driven to rotate, and the inner ring 4 drives the other control cylinders to rotate accordingly, so that the telescopic pins 18 on the other control cylinders contact the inclined surface on the special-shaped internal thread 3. Under the action of the inclined surface, the telescopic pin 18 is pushed to overcome the contraction of the telescopic spring 19, thereby crossing the thread of the special-shaped internal thread 3, so that the inner ring 4 can rotate smoothly. 6, overcoming the positioning spring 37 to push the positioning rod 35 to the right. When the small piston rod 22 is fully extended, the positioning rod 35 exits the valve core groove 33, and the valve core 30 is released from the positioning. Under the action of the torsion spring 34, the valve core 30 rotates until the valve core handle 32 touches the limit block 15, and the valve core 30 returns to the first position. The valve core flow channel 31 and the small piston chamber 13 are disconnected. At this time, the small piston rod 22 is fully extended to drive the control ring 16 to move to the right position. The control ring 16 drives the fixing rod 20 to exit the fixing hole 7, and the control cylinder and the inner ring 4 are separated. The tee 39 is removed from the left sleeve ring 1, and then the control cylinder is taken out from between the left sleeve ring 1 and the right sleeve ring 2. At the same time, due to the rotation of the inner ring 4, the front control cylinder comes to the bottom.Repeat the above method to continue disassembling the control cylinders, thereby controlling the inner ring 4 to rotate continuously, and transport the control cylinders at a high position to the lowest position and disassemble them one by one. This does not require workers to climb to a high place or use lifting equipment, and the pipes between the control cylinders do not need to be disassembled, avoiding oil contamination and resource waste, and facilitating subsequent use.

[0036] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A pipe jacking machine relay room, characterized in that: The invention comprises a left sleeve ring (1), a right sleeve ring (2), an inner ring (4) and a control oil cylinder; the left sleeve ring (1) is sleeved on the right sleeve ring (2); the inner ring (4) is rotatably connected to the right sleeve ring (2); a plurality of control oil cylinders are provided, and are evenly distributed in the inner ring (4) along the circumferential direction; the control oil cylinder comprises a cylinder body (10) and a control ring (16); the right side of the cylinder body (10) is in close contact with the right sleeve ring (2); the control ring (16) is slidably connected to the cylinder body (10), and the control ring (16) can slide between the left position and the right position; When the control ring (16) moves from the left position to the right position, the control ring (16) drives the inner ring (4) to rotate relative to the right sleeve ring (2); When the control ring (16) moves from the right position to the left position, the inner ring (4) does not rotate; When the control ring (16) is in the left position, the control ring (16) limits the cylinder body (10), and the cylinder body (10) cannot move relative to the inner ring (4); When the control ring (16) is in the right position, the cylinder (10) and the inner ring (4) are separated.

2. The pipe jacking machine relay room according to claim 1, characterized in that: The control oil cylinder further includes a control pin (17), a telescopic pin (18) and a telescopic spring (19); The inner ring (4) has a plurality of ring sliding grooves (5) evenly distributed along the circumferential direction; The right collar (2) is provided with a special-shaped internal thread (3), the left side of the special-shaped internal thread (3) is a vertical surface, and the right side is an inclined surface; The control pin (17) is fixedly connected to the control ring (16); The telescopic pin (18) is slidably connected to the control column pin (17) along the axial direction, the telescopic pin (18) is slidably connected to the annular sliding groove (5), and the telescopic pin (18) extends into the special-shaped internal thread (3); The telescopic spring (19) is arranged in the telescopic pin (18) and is used to drive the telescopic pin (18) to move in a direction close to the special-shaped internal thread (3).

3. The pipe jacking machine relay room according to claim 2, characterized in that: When the control ring (16) moves from the left position to the right position, the telescopic pin (18) abuts against the vertical surface, and the telescopic pin (18) drives the inner ring (4) to rotate; when the control ring (16) moves from the right position to the left position, the telescopic pin (18) abuts against the inclined surface, and the inclined surface pushes the telescopic pin (18) to overcome the telescopic spring (19) and slide, so that the telescopic pin (18) can pass over the special-shaped internal thread (3), and the inner ring (4) does not rotate.

4. The pipe jacking machine relay room according to claim 1, characterized in that: A plurality of fixing plates (6) are evenly distributed in the inner ring (4) along the circumferential direction. The fixing plates (6) correspond to the control oil cylinders one by one. Two fixing holes (7) are symmetrically provided on the fixing plates (6) with the center line as the axis. Two fixing rods (20) are symmetrically provided on the control ring (16) with the center line as the axis; When the control ring (16) is in the left position, the control ring (16) and the right side of the fixing plate (6) are in close contact, the fixing rod (20) extends into the fixing hole (7), and the cylinder (10) is limited so that it cannot move relative to the inner ring (4); When the control ring (16) is in the right position, the control ring (16) is away from the fixing plate (6), the fixing rod (20) exits the fixing hole (7), and the cylinder body (10) and the inner ring (4) are separated.

5. The pipe jacking machine relay room according to claim 1, characterized in that: The control oil cylinder further includes a small piston (21), a connecting piston (26), a steel ball (28), and a connecting spring (29); The cylinder (10) is provided with a small piston hole in the left-right direction; The small piston (21) is slidably arranged in the small piston hole and divides the small piston hole into a small piston chamber (13) and a small piston rod chamber (14). The small piston rod chamber (14) is communicated with the atmosphere. A small piston rod (22) is provided on the right side of the small piston (21). The right end of the small piston rod (22) extends out of the small piston rod chamber (14) and is fixedly connected to the control ring (16). A side hole (23) is provided in the radial direction on the small piston (21); The connecting piston (26) is axially slidably connected in the small piston (21), a left piston chamber (25) is formed between the left side of the connecting piston (26) and the small piston (21), a right piston chamber (24) is formed between the right side of the connecting piston (26) and the small piston (21), the left piston chamber (25) is communicated with the small piston chamber (13), the right piston chamber (24) is communicated with the small piston rod chamber (14), and a piston annular groove (27) is provided on the connecting piston (26); The connecting spring (29) is arranged in the right piston chamber (24) to drive the connecting piston (26) to move leftward; A cylinder annular groove (38) is further provided in the cylinder (10); The steel ball (28) is slidably disposed in the side hole (23), and the steel ball (28) alternately extends into the piston annular groove (27) and the cylinder annular groove (38).

6. The pipe jacking machine relay room according to claim 1, characterized in that: The control oil cylinder further includes a large piston (8) and a large piston rod (9); A large piston hole is provided in the cylinder body (10) along the left and right directions; The large piston (8) is slidably disposed in the large piston hole and divides the large piston hole into a large piston chamber (11) and a large piston rod chamber (12); a port A is provided on the cylinder body (10), and the port A is in communication with the large piston chamber (11); The large piston rod (9) is slidably arranged on the left side of the cylinder body (10), and the right end of the large piston rod (9) extends into the large piston rod cavity (12) and is fixedly connected to the large piston (8).

7. The pipe jacking machine relay room according to claim 6, characterized in that: The control oil cylinder further includes a valve core (30) and a torsion spring (34); The cylinder body (10) is provided with a limit block (15), and the cylinder body (10) is provided with a C port and a B port on the front and rear sides respectively; The valve core (30) is rotatably connected to the cylinder body (10), a valve core flow channel (31) is provided in the valve core (30), a valve core handle (32) is provided at the upper end of the valve core (30), and a valve core groove (33) is provided on the outer circumferential wall of the valve core (30), and the valve core (30) can rotate among a first position, a second position and a third position; The torsion spring (34) is disposed in the cylinder body (10) and is used to drive the valve core (30) to rotate in a direction in which the valve core handle (32) approaches the limit block (15).

8. The pipe jacking machine relay room according to claim 7, characterized in that: When the valve core (30) is in the first position, the valve core flow channel (31) connects the B port, the C port and the large piston rod chamber (12); when the valve core (30) is in the second position, the valve core flow channel (31) connects the B port, the C port, the small piston chamber (13) and the large piston rod chamber (12); when the valve core (30) is in the third position, the valve core flow channel (31) connects the B port, the small piston chamber (13) and the large piston rod chamber (12).

9. The pipe jacking machine relay room according to claim 7, characterized in that: The control oil cylinder further includes a positioning rod (35) and a positioning spring (37); The positioning rod (35) is connected to the cylinder body (10) in a sliding manner along the left and right directions, the left end of the positioning rod (35) can be extended into the valve core groove (33), and the right end of the positioning rod (35) is provided with a rod pin (36) in the radial direction, and the rod pin (36) extends into the small piston rod cavity (14); The positioning spring (37) is arranged in the cylinder body (10) to drive the positioning rod (35) to move leftward.

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