Gas pressurization sealing bin opening device for slurry balance jacking pipe

Abstract

The utility model discloses a slurry balance pipe jacking gas pressurization sealing bin opening device which comprises a partition plate assembly installed at the rear end of a main bin of a pipe jacking machine and the front end of a first pipe joint, a transition bin connected to the rear portion of the partition plate assembly, and an air inlet device, an air exhaust device and an air pressure monitoring device which are connected with the pipe jacking machine and the transition bin. The sludge conveying device, the sludge discharging device, the water feeding device, the water discharging device, the communication device and the cable device are communicated with the pipe jacking machine. The utility model has the advantages that the problems of more grouting reinforcement limitation, small open cut foundation pit applicability, high grouting reinforcement effect requirement, high communication and coordination difficulty of related peripheral units, high cost, site limitation, large construction machinery investment, larger influence on the surrounding environment and the like in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of trenchless pipeline construction, in particular to pipe jacking maintenance equipment. Background Art

[0002] Pipe jacking is a trenchless pipeline construction technique used in construction sites with complex geology and numerous ground structures. It features a small construction site, low noise levels, minimal impact on the surrounding environment, and minimal influence from natural conditions. The typical construction process involves first excavating a launch well for pipe jacking. Pipe jacking machines are then used to advance the tunnel. Using the thrust of the main jacking cylinders and inter-pipeline relays, the machine and tool pipe are pushed from behind. The tool pipe or machine is then pushed from the launch well through the soil and hoisted into the receiving well.

[0003] If a rock gets stuck in the cutterhead during the jacking process, the torque of the cutterhead drive motor will be too high, which may cause the motor to burn out. Once the motor burns out, the risk and cost of replacement will be extremely high. Or, if the jacking time is too long and the cutter head is severely worn, it needs to be replaced before the jacking can continue. Otherwise, even if the jacking force is increased, it will be difficult to break the rock and soil in front. In addition, the excessive jacking force may damage the constructed pipe section. The general treatment methods for problems such as the repair and replacement of the cutterhead and cutter head are:

[0004] 1. Use open excavation for repair, excavating to the repair part of the machine head or the isolated rock. Although this method is low-cost, it is applicable to many conditions. It is only applicable to conditions where there are no underground pipelines crossing, the ground is open, and there are no buildings around.

[0005] 2. Use grouting reinforcement and warehouse opening maintenance method, use cement mixing or high-pressure jet grouting method to carry out grouting reinforcement on the 2m around the jacking contour line and 6m above the top of the machine head. The reinforcement strength requires unconfined compressive strength 28d ≥ 0.6MPa. After the strength test meets the requirements, open the manhole and open the warehouse to deal with the isolated rocks. This method has high requirements for reinforcement effect. If the groundwater is abundant and the construction experience is insufficient, it is easy to lead to poor reinforcement effect and the risk of collapse. The reinforcement cycle is long, which has a great impact on the construction period. It is difficult for construction machinery to enter the site for construction when there are buildings on the ground and there is no reinforced working space. It also has a certain impact on the surrounding environment.

[0006] If a device can be developed to solve the above problems, it will be very beneficial to the pipe jacking maintenance construction, reducing the impact on the surrounding environment and shortening the construction period. Utility Model Content

[0007] The purpose of the utility model is to provide a gas pressurized sealing opening device for mud-water balance jacking pipes, so as to solve the problems in the prior art of maintaining jacking pipes, such as many technical application restrictions, negative impact on the surrounding environment, long construction period, and high safety risks.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] A mud-water balance pipe jacking gas pressurized sealing opening device includes a baffle assembly installed at the rear end of the main bin and the front end of the first pipe section of the pipe jacking machine, a transition bin connected behind the baffle assembly, an air intake device, an exhaust device, and an air pressure monitoring device connecting the pipe jacking machine and the transition bin, as well as a mud conveying device, a mud discharge device, a water supply device, a drainage device, a communication device, and a cable device connected to the pipe jacking machine.

[0010] Furthermore, the air intake device includes a main bin air intake assembly, a crushing bin air intake assembly, a spare air intake assembly, a transition bin air intake assembly, and an air supply device;

[0011] The main compartment air intake assembly includes a main compartment air intake pipe, a main compartment air intake valve, and a reserved pipe hole for the main compartment air intake valve;

[0012] The crushing chamber air intake assembly includes a first crushing chamber air intake pipe, a second crushing chamber air intake pipe, a crushing chamber air intake valve, a crushing chamber air intake valve reserved pipe hole, and a crushing chamber reserved hole;

[0013] The spare air intake assembly includes a spare air intake pipe, a spare air intake valve, and a reserved pipe hole for the spare air intake valve;

[0014] The transition chamber air intake assembly includes a transition chamber air intake pipe, a transition chamber air intake valve, and a reserved pipe hole for the transition chamber air intake valve;

[0015] The main chamber air inlet pipe, the second crushing chamber air inlet pipe, the spare air inlet pipe, and the transition chamber air inlet pipe are connected to the air supply device;

[0016] The exhaust device includes a reserved pipe hole for the exhaust valve, an exhaust valve, an exhaust pipe, and a safety pressure relief valve;

[0017] The air pressure monitoring device is a barometer;

[0018] The mud conveying device includes a first crushing chamber mud conveying pipe, a second crushing chamber mud conveying pipe, a crushing chamber mud conveying pipe valve, and a reserved pipe hole for the crushing chamber mud conveying pipe;

[0019] The mud discharge device includes a first crushing chamber mud discharge pipe, a second crushing chamber mud discharge pipe, a crushing chamber mud discharge pipe valve, and a reserved pipe hole for the crushing chamber mud discharge pipe;

[0020] The water supply device includes a first water supply pipe, a second water supply pipe, a water supply pipe valve, and a reserved pipe hole for the water supply pipe;

[0021] The drainage device includes a first drainage pipe, a second drainage pipe, a drainage pipe valve, and a reserved pipe hole for the drainage pipe;

[0022] The communication device includes a communication line and a reserved pipe hole for the communication line;

[0023] The cable device includes a cable and a reserved conduit hole for the cable.

[0024] Furthermore, the outer sides of the reserved pipe holes for the main bin air intake valve, the reserved pipe holes for the crushing bin air intake valve, and the reserved pipe holes for the spare air intake valve are all welded and sealed on the baffle assembly, the outer sides of the reserved pipe holes for the transition bin air intake valve are welded and sealed on the transition bin, there are no less than two reserved pipe holes for the exhaust valve, and the outer sides are respectively welded and sealed on the transition bin and the baffle assembly, and the outer sides of the reserved holes for the crushing bin are sealed and installed on the sealing plate between the main bin and the crushing bin of the pipe jacking machine;

[0025] The inner end of the reserved pipe hole of the main bin air inlet valve is connected to the main bin of the pipe jacking machine, and the outer end thereof is sealed and threadedly connected to the main bin air inlet valve, and the main bin air inlet valve is connected to the main bin air inlet pipe;

[0026] The inner end of the reserved pipe hole of the crushing bin air inlet valve is connected to one end of the first crushing bin air inlet pipe, and the other end of the first crushing bin air inlet pipe is threadedly connected to the outer end of the reserved hole of the crushing bin, the inner end of the reserved hole of the crushing bin is connected to the crushing bin of the pipe jacking machine, and the outer end of the reserved pipe hole of the crushing bin air inlet valve is sealingly threadedly connected to the crushing bin air inlet valve, and the crushing bin air inlet valve is connected to the second crushing bin air inlet pipe. The crushing bin air inlet valve is also provided with a crushing bin air pressure gauge;

[0027] The inner end of the reserved pipe hole of the backup air intake valve is connected to the main chamber of the pipe jacking machine, and the outer end thereof is threadedly connected to the backup air intake valve, and the backup air intake valve is connected to the backup air intake pipe;

[0028] The inner end of the transition chamber air intake reserved pipe hole is connected to the transition chamber, and the outer end thereof is threadedly connected to the transition chamber air intake valve, and the transition chamber air intake valve is connected to the transition chamber air intake pipe;

[0029] The inner end of the reserved pipe hole of the exhaust valve installed on the transition bin is connected to the transition bin, and the outer end thereof is sealed and threadedly connected to the exhaust valve; the inner end of the reserved pipe hole of the exhaust valve installed on the partition assembly is connected to the main bin of the pipe jacking machine, and the outer end thereof is threadedly connected to the exhaust valve. The exhaust valve is a pressure regulating valve, and the exhaust pipe is connected to the exhaust valve.

[0030] Furthermore, the outer sides of the reserved pipe holes for the crushing bin mud delivery pipe, the crushing bin mud discharge pipe, the water supply pipe, the drainage pipe, the communication line and the cable are sealed and connected to the partition assembly;

[0031] The outer end of the reserved pipe hole of the crushing chamber mud delivery pipe is connected to the first crushing chamber mud delivery pipe by a snap buckle, and the inner end of the crushing chamber mud delivery pipe is connected to the second crushing chamber mud delivery pipe by a snap buckle. The outlet of the second crushing chamber mud delivery pipe is connected to the crushing chamber of the pipe jacking machine; a crushing chamber mud delivery pipe valve is installed on the second crushing chamber mud delivery pipe;

[0032] The inner end of the reserved pipe hole of the crushing chamber mud discharge pipe is connected to the first crushing chamber mud discharge pipe by a clip, the inlet of the first crushing chamber mud discharge pipe is connected to the crushing chamber of the pipe jacking machine, a crushing chamber mud discharge pipe valve is installed on the first crushing chamber mud discharge pipe, and the outer end of the reserved pipe hole of the crushing chamber mud discharge pipe is connected to the second crushing chamber mud discharge pipe by a clip;

[0033] The outer end of the reserved pipe hole of the water supply pipe is connected to the water supply pipe valve, the water supply pipe valve is connected to the first water supply pipe, the inner end of the reserved pipe hole of the water supply pipe is bonded and connected to the second water supply pipe, and the second water supply pipe is in the main compartment of the pipe jacking machine;

[0034] The inner end of the reserved pipe hole of the drainage pipe is bonded and connected to the first drainage pipe, the first drainage pipe is in the main chamber of the pipe jacking machine, the outer end of the reserved pipe hole of the drainage pipe is connected to the drainage pipe valve, and the drainage pipe valve is connected to the second drainage pipe;

[0035] The communication line and the cable line respectively pass through the reserved pipe holes for the communication line and the reserved pipe holes for the cable line and enter the main chamber and the crushing chamber of the pipe jacking machine to be connected with the monitoring equipment and the electrical equipment.

[0036] Furthermore, the partition assembly is sealed and connected to the transition chamber via a flange.

[0037] Furthermore, the transition bin is provided with an entry door and an exit door, both of which are hingedly connected to the transition bin on one side, and the exit door of the transition bin leads to the main bin of the pipe jacking machine; seals are provided at the closing part between the entry door and the transition bin, and at the closing part between the exit door and the partition assembly. After the entry door is closed, its four corners are fixed by bolts, and the exit door is opened and closed by rotating the door handle.

[0038] Furthermore, there are multiple safety pressure relief valves, which are respectively installed on the transition chamber and the partition assembly. The safety pressure relief valve is a one-way valve that adjusts the internal air pressure of the transition chamber and the main chamber of the pipe jacking machine. A pressure gauge is provided near each safety pressure relief valve, and the pressure gauge is respectively threadedly connected to the transition chamber and the partition assembly through a retractable hose.

[0039] Furthermore, the transition chamber and the partition assembly are both provided with observation windows.

[0040] Furthermore, a working platform is set up at the bottom of the transition warehouse;

[0041] The partition assembly is composed of a plurality of partitions and reinforcing ribs and is a steel structural member.

[0042] Furthermore, the air supply device includes an air compressor, an emergency air compressor, an air storage tank, and a compressed air dryer. The air compressor and the emergency air compressor are both connected to the air storage tank, and the air storage tank is connected to the compressed air dryer. The main bin air inlet pipe, the transition bin air inlet pipe, the second crushing bin air inlet pipe, and the spare air inlet pipe are all connected to the compressed air dryer.

[0043] The advantages of the present invention include:

[0044] The partition assembly is a sealed steel structure that can effectively resist the load transferred to the device by air during the pressurization process. It can be dismantled and reused, effectively reducing construction costs.

[0045] A sealing device transition chamber and partition assembly are set at the rear of the pipe jacking machine. The gas in the transition chamber and the pipe jacking machine is pressurized through multiple reserved air inlet holes and air inlet valves. The pressure gauge is used to monitor the pressurization situation in real time, and the air pressure in the transition chamber and the pipe jacking machine is controlled in real time to effectively reach the target air pressure value, ensure the stability of the gas pressure during the operation, and improve construction safety.

[0046] The operation process is divided into four stages: first, the operator enters the transition chamber, and the gas pressure in the transition chamber slowly rises to the target pressure value, then enters the main chamber, and then enters the crushing chamber. After the operation is completed, return to the transition chamber and slowly reduce the pressure to the air pressure outside the chamber before leaving the transition chamber. The adaptation and switching of the operating air pressure and the air pressure outside the chamber are achieved in the transition chamber, ensuring that the operator is fully prepared to adapt to the pressure and thus realize operation under gas pressure.

[0047] The transition chamber and the partition assembly are equipped with observation holes and pressure gauges, and a pressure gauge is installed in the air inlet pipe, so that the entire gas pressurization process can be operated digitally, and the situation in the chamber can be observed at any time so that timely measures can be taken;

[0048] By reserving pipe holes, various pipelines can enter the interior of the pipe jacking machine. Under the premise of ensuring sealing, the mud injection pipe, mud discharge pipe, monitoring equipment, electrical facilities, water supply and drainage functions inside the pipe jacking machine can all operate normally.

[0049] The utility model effectively solves the problems of the existing technology such as many limitations of grouting reinforcement, limited applicability of open excavation foundation pits, high requirements for grouting reinforcement effects, difficulty in communication and coordination with surrounding units, high costs, site restrictions, large investment in construction machinery, and greater impact on the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute an improper limitation of the present invention. In the drawings:

[0051] Figure 1 This is a schematic structural diagram of an embodiment of the utility model;

[0052] Figure 2 It is a schematic diagram of the structure of the transition chamber and the partition assembly;

[0053] Figure 3 This is a schematic diagram of the front structure of the transition chamber and the partition assembly;

[0054] Figure 4 Schematic diagram of the inner surface structure of the partition assembly;

[0055] Figure 5-6 It is a schematic diagram of the process of workers entering and exiting the warehouse.

[0056] Pipe jacking machine 1, main chamber 11, main chamber air inlet pipe 111, main chamber air inlet valve 112, main chamber air inlet valve reserved hole 113, crushing chamber 12, first crushing chamber air inlet pipe 121, second crushing chamber air inlet pipe 122, crushing chamber air inlet valve 123, crushing chamber air inlet valve reserved hole 124, crushing chamber manhole 125, spare air inlet pipe 131, spare air inlet valve 132, spare air inlet valve reserved hole 133, first crushing chamber mud delivery pipe 141, second crushing chamber mud delivery pipe 142, crushing chamber mud delivery pipe reserved hole 143, crushing chamber mud delivery pipe valve 144, crushing chamber mud discharge pipe reserved hole 15, crushing bin mud discharge pipe valve 151, reserved pipe hole 16 for water supply pipe, reserved pipe hole 17 for drainage pipe, reserved pipe hole 18 for communication line, reserved pipe hole 19 for cable line, first pipe section 2, partition assembly 3, transition bin 4, transition bin air inlet pipe 41, transition bin air inlet valve 42, reserved pipe hole 43 for transition bin air inlet valve, bin entrance door 44, bin exit door 45, flange 46, reserved pipe hole 51 for exhaust valve, exhaust valve 52, safety pressure relief valve 53, pressure gauge 6, air compressor 71, emergency air compressor 72, air storage tank 73, compressed air dryer 74, observation window 8, working platform 9. DETAILED DESCRIPTION

[0057] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0058] like Figure 1-4 As shown, a mud and water balance pipe jacking gas pressurized sealing opening device includes a baffle assembly 3 installed at the rear end of the main bin 11 of the pipe jacking machine 1 and the front end of the first pipe section 2, and a transition bin 4 connected behind the baffle assembly 3. It also includes an air intake device, an exhaust device, and an air pressure monitoring device connecting the pipe jacking machine 1 and the transition bin 4, as well as a mud conveying device, a mud discharge device, a water supply device, a drainage device, a communication device, and a cable device connected to the pipe jacking machine 1.

[0059] The air intake device includes a main chamber air intake assembly, a crushing chamber air intake assembly, a spare air intake assembly, a transition chamber air intake assembly, and an air supply device;

[0060] The main compartment air intake assembly includes a main compartment air intake pipe 111, a main compartment air intake valve 112, and a main compartment air intake valve reserved pipe hole 113;

[0061] The crushing chamber air intake assembly includes a first crushing chamber air intake pipe 121, a second crushing chamber air intake pipe 122, a crushing chamber air intake valve 123, a crushing chamber air intake valve reserved pipe hole 124, and a crushing chamber reserved hole;

[0062] The backup air intake assembly includes a backup air intake pipe 131, a backup air intake valve 132, and a reserved pipe hole 133 for the backup air intake valve;

[0063] The transition chamber air intake assembly includes a transition chamber air intake pipe 41, a transition chamber air intake valve 42, and a reserved pipe hole 43 for the transition chamber air intake valve;

[0064] The main chamber air inlet pipe 111, the second crushing chamber air inlet pipe 122, the spare air inlet pipe 132, and the transition chamber air inlet pipe 41 are connected to the air supply device;

[0065] The exhaust device includes an exhaust valve reserved pipe hole 51, an exhaust valve 52, an exhaust pipe, and a safety pressure relief valve 53;

[0066] The air pressure monitoring device is a barometer 6.

[0067] The mud conveying device includes a first crushing chamber mud conveying pipe 141, a second crushing chamber mud conveying pipe 142, a crushing chamber mud conveying pipe valve, and a crushing chamber mud conveying pipe reserved hole 143;

[0068] The mud discharge device includes a first crushing chamber mud discharge pipe, a second crushing chamber mud discharge pipe, a crushing chamber mud discharge pipe valve 151, and a reserved pipe hole 15 for the crushing chamber mud discharge pipe;

[0069] The water supply device includes a first water supply pipe, a second water supply pipe, a water supply pipe valve, and a reserved pipe hole 16 for the water supply pipe;

[0070] The drainage device includes a first drainage pipe, a second drainage pipe, a drainage pipe valve, and a reserved pipe hole 17 for the drainage pipe;

[0071] The communication device includes a communication line and a reserved pipe hole 18 for the communication line;

[0072] The cable device includes a cable and a reserved conduit hole 19 for the cable.

[0073] The outer sides of the reserved pipe hole 113 for the main bin air intake valve, the reserved pipe hole 124 for the crushing bin air intake valve, and the reserved pipe hole 133 for the spare air intake valve are all welded and sealed and installed on the baffle assembly 3. The outer sides of the reserved pipe hole 43 for the transition bin air intake valve are welded and sealed and installed on the transition bin 4. There are no less than two reserved pipe holes 51 for the exhaust valve, which are respectively welded and sealed on the outer sides of the transition bin 4 and the baffle assembly 3. The outer sides of the reserved holes for the crushing bin are sealed and installed on the sealing plate between the main bin 11 and the crushing bin 12 of the pipe jacking machine 1.

[0074] The inner end of the reserved pipe hole 113 of the main bin air inlet valve is connected to the main bin 11 of the pipe jacking machine, and the outer end thereof is threadedly connected to the main bin air inlet valve 112. The main bin air inlet valve 112 adopts a pressure regulating valve, and the main bin air inlet valve 112 is connected to the main bin air inlet pipe 111; a thin leak-proof tape can be wrapped around the threaded connection to improve the sealing performance.

[0075] The inner end of the reserved pipe hole 124 of the crushing bin air inlet valve is connected to one end of the first crushing bin air inlet pipe 121, and the other end of the first crushing bin air inlet pipe 121 is threadedly connected to the outer end of the reserved hole of the crushing bin. The inner end of the reserved hole of the crushing bin is connected to the crushing bin 12 of the pipe jacking machine. The first crushing bin air inlet pipe 121 is a flexible air pressure pipe. The outer end of the reserved pipe hole 124 of the crushing bin air inlet valve is threadedly connected to the crushing bin air inlet valve 123. The crushing bin air inlet valve 123 adopts a pressure regulating valve. The crushing bin air inlet valve 123 is connected to the second crushing bin air inlet pipe 122; the crushing bin air inlet valve 123 is also provided with a crushing bin air pressure gauge, and a thin leak-proof tape can be wrapped around the threaded connection to improve the sealing performance;

[0076] The inner end of the reserved pipe hole 133 of the backup air intake valve is connected to the main compartment 11 of the pipe jacking machine, and the outer end thereof is threadedly connected to the backup air intake valve 132. The backup air intake valve 132 adopts a pressure regulating valve, and the backup air intake valve 132 is connected to the backup air intake pipe 131; a thin leak-proof tape can be wrapped around the threaded connection to improve the sealing performance.

[0077] The inner end of the reserved pipe hole 43 of the transition chamber air intake valve is connected to the transition chamber 4, and the outer end thereof is threadedly connected to the transition chamber air intake valve 42. The transition chamber air intake pipe valve 42 adopts a pressure regulating valve, and the transition chamber air intake valve 42 is connected to the transition chamber air intake pipe 41; a thin leak-proof tape can be wrapped around the threaded connection to improve the sealing performance.

[0078] The air supply device includes an air compressor 71, an emergency air compressor 72, an air storage tank 73, and a compressed air dryer 74. The air compressor 71 and the emergency air compressor 72 are both connected to the air storage tank 73, and the air storage tank 73 is connected to the compressed air dryer 74. The main bin air intake pipe 111, the transition bin air intake pipe 41, the second crushing bin air intake pipe 122, and the spare air intake pipe 131 are all connected to the compressed air dryer 74.

[0079] The inner end of the reserved pipe hole 51 for the exhaust valve installed in the transition chamber 4 is connected to the transition chamber 4, and its outer end is threadedly connected to the exhaust valve 52. The inner end of the reserved pipe hole 51 for the exhaust valve installed in the partition assembly 3 is connected to the main chamber 11 of the pipe jacking machine, and its outer end is threadedly connected to the exhaust valve 52. The exhaust valve 52 is a pressure regulating valve, and the exhaust pipe is connected to the exhaust valve 52. The threaded connection can be wrapped with thin leak-proof tape to improve the sealing performance.

[0080] The reserved pipe hole 143 for the crushing chamber mud delivery pipe, the reserved pipe hole 15 for the crushing chamber mud discharge pipe, the reserved pipe hole 16 for the water supply pipe, the reserved pipe hole 17 for the drainage pipe, the reserved pipe hole 18 for the communication line, and the reserved pipe hole 19 for the cable are arranged on the partition assembly 3; the outer sides of the reserved pipe hole 143 for the crushing chamber mud delivery pipe and the reserved pipe hole 15 for the crushing chamber mud discharge pipe are sealed and welded to the partition assembly 3, and the outer sides of the reserved pipe hole 16 for the water supply pipe, the reserved pipe hole 17 for the drainage pipe, the reserved pipe hole 18 for the communication line, and the reserved pipe hole 19 for the cable are filled with flexible sealing material.

[0081] The outer end of the reserved pipe hole 143 of the crushing chamber mud delivery pipe is snap-fitted to the first crushing chamber mud delivery pipe 141, and the inner end thereof is snap-fitted to the second crushing chamber mud delivery pipe 142. The outlet of the second crushing chamber mud delivery pipe 142 is connected to the crushing chamber 12 of the pipe jacking machine; a crushing chamber mud delivery pipe valve is installed on the second crushing chamber mud delivery pipe 142;

[0082] The inner end of the reserved pipe hole 15 of the crushing chamber mud discharge pipe is connected to the first crushing chamber mud discharge pipe by a snap. The inlet of the first crushing chamber mud discharge pipe is connected to the crushing chamber 12 of the pipe jacking machine. The crushing chamber mud discharge pipe is installed with a crushing chamber mud discharge pipe valve 151, and the outer end of the crushing chamber mud discharge pipe is connected to the second crushing chamber mud discharge pipe by a snap.

[0083] The outer end of the reserved pipe hole 16 of the water supply pipe is connected to the water supply pipe valve, which is a stainless steel PPR ball valve and is connected to the first water supply pipe; the inner end of the reserved pipe hole 16 of the water supply pipe is bonded and connected to the second water supply pipe, which is in the main compartment 11 of the pipe jacking machine. The first and second water supply pipes are hoses.

[0084] The inner end of the reserved pipe hole 17 for the drain pipe is bonded and connected to the first drain pipe, which is inside the main compartment 11 of the pipe jacking machine. The outer end of the reserved pipe hole 17 for the drain pipe is connected to the drain pipe valve, which is a stainless steel PPR ball valve. The drain pipe valve is connected to the second drain pipe. The first and second drain pipes are hoses.

[0085] The communication line and the cable line respectively pass through the reserved pipe hole 18 for the communication line and the reserved pipe hole 19 for the cable line to enter the main chamber 11 and the crushing chamber 12 of the pipe jacking machine and are connected to the monitoring equipment and the electrical equipment.

[0086] The partition assembly 3 is sealed with the transition chamber 4 via a flange 46, which is welded to the partition assembly 3. The transition chamber 4 can be connected to the flange 46 by screwing. Soft sealing materials can be used to further seal the transition chamber 4 and the flange 46 to ensure airtightness.

[0087] The transition chamber 4 is provided with an entry door 44 and an exit door 45, both of which are required to have a certain strength and rigidity. The entry door 44 and the exit door 45 are both hingedly connected to the transition chamber 4 on one side, and the connection is tight and stable. The exit door 45 of the transition chamber 4 leads to the main chamber 11 of the pipe jacking machine. Sealing rings are provided at the closure between the entry door 44 and the transition chamber 4, and at the closure between the exit door 45 and the partition assembly 3. The entry door 44 is an outward-opening door. After closing, its four corners are fastened with bolts to provide an entrance for operators to enter the chamber and to ensure that gas does not leak from the entry door 44 during the pressurization process. The exit door 45 is an inward-opening swing door. The door is opened and closed by rotating the door handle, providing a passage for operators to enter the main chamber 11 of the pipe jacking machine and to ensure that gas does not leak from the door during the pressurization process.

[0088] There are multiple safety pressure relief valves 53, which are installed near the pressure gauge 6. The safety pressure relief valve 53 is a one-way valve that adjusts the internal air pressure of the transition bin 4 and the main bin 11 of the pipe jacking machine. The adjustment accuracy is high to ensure that the gas pressure reaches the target value. The pressure gauge 6 can adopt a radial pointer type with a measurement accuracy of 1.6Mpa. The applicable medium is gas and liquid. The pressure gauge 6 is respectively connected to the transition bin 4 and the partition assembly 3 through a retractable hose thread. The pressure in the bin is read and determined by the pressure gauge 6, and multiple pressure gauges 6 are set as backup to ensure accurate readings.

[0089] The transition chamber 4 and the partition assembly 3 are both flange-connected with observation windows 8 for observing the operation conditions inside the chamber so that timely measures can be taken.

[0090] A working platform 9 is set up at the bottom of the transition warehouse 4.

[0091] The partition assembly 3 is composed of a number of partitions and reinforcing ribs. It is a prefabricated steel structure with high strength. It can resist the gas pressure during the pressurization process, ensure that the device is stable and does not deform, avoid air leakage problems, and effectively resist the load transmitted to the device by the air during the pressurization process. In addition, the steel product can be dismantled and reused after the construction is completed, which effectively reduces the construction cost. In addition, the prefabricated cross-sectional form is adjusted according to the cross-sectional form of the jacking pipe, and has strong applicability; the size is determined according to the inner diameter of the jacking pipe, and its size is slightly smaller than the inner diameter of the jacking pipe 1 and the inner diameter of the first pipe section 2. The reserved space is tightly welded with the reserved steel plate of the jacking pipe and the first pipe section 2. The steel partitions and reinforcing ribs can be prefabricated in blocks, preferably in two blocks, for easy transportation and installation.

[0092] During the installation of the present invention, the prefabricated components are transported to the rear of the pipe jacking machine 1 and the first pipe section 2 by hoisting and using a trolley for transporting the components in the pipe. The steel partitions and reinforcing ribs are assembled at the reserved steel plates of the pipe section, and the components are assembled and welded from top to bottom. The components are hoisted by a hand chain hoist. After the assembly and welding of the partitions and reinforcing ribs are completed, the flange 46 for connecting the transition bin is installed. The hand chain hoist is also used for hoisting and stabilization. Finally, the safety pressure relief valve 53, the pressure gauge 6, the pipeline and other accessories are installed, and an operating platform 9 is set up. The operating platform 9 is set up to the bottom of the transition bin 4 to provide a working surface for the operator.

[0093] During construction, the valves on the crushing chamber's mud delivery pipe are opened, and bentonite slurry is injected into the crushing chamber 12. The pressure inside the crushing chamber 12 is kept in balance with the soil pressure ahead. The pressure data of the crushing chamber 12 is recorded and used to determine the working pressure of the air pressure operation. Then, valves 144 and 151 on the crushing chamber's mud delivery and discharge pipes are closed. Repeated gas pressurization and depressurization tests are performed on the transition chamber 4 and the main pipe jacking chamber 11 to determine the pressurization and depressurization time and to check the sealing performance of the device.

[0094] The air compressor 71 is turned on and enters the automatic operation state. The air compressor 71 is continuously operated according to the air supply pressure determined by the test. The crushing chamber 12 is pressurized with air through the crushing chamber air intake assembly, so that the pressure in the crushing chamber 12 is consistent with the previously recorded mud-water balance pressure. The main chamber air intake assembly is then used to pressurize the main chamber 11 with air until the air pressure in the main chamber 11 reaches the working pressure. The pressurization operation of the main chamber 11 and the crushing chamber 12 can be carried out simultaneously. The internal air pressure is monitored by the barometer 6. If the air pressure is too high, the excess air pressure can be discharged through the safety pressure relief valve 53.

[0095] The process of workers entering and leaving the warehouse is as follows Figure 5-6 As shown, specifically:

[0096] After the operator enters the transition chamber 4, the entrance to the transition chamber 4 is closed. The operator then closes the entrance door and tightens the screws. Gas is pressurized through the transition chamber air intake assembly, slowly increasing the pressure to the working pressure at a frequency of no more than 0.12 MPa / 10 minutes. The pressure is monitored using the pressure gauge 6. If the pressure is too high, excess gas is discharged through the safety relief valve 53. The operator can also be observed through the observation window 8, allowing the operator to monitor the situation at all times.

[0097] After the transition chamber 4 is pressurized to the working pressure and no abnormalities are found, the operator opens the outlet of the transition chamber 4. At this time, the pressure in the transition chamber 4 is consistent with that in the main chamber 11 and the crushing chamber 12. The operator brings the tools into the main chamber 11. The operator can observe the actual situation of the main chamber 11 through the observation window 8 or monitor the internal situation. The working time of the staff in the main chamber 11 and the crushing chamber 12 shall not exceed 4 hours at a time.

[0098] After entering the main chamber 11, the operator enters the crushing chamber 12 through the crushing chamber manhole 125 above the pipe jacking machine to handle isolated rocks or repair and replace the cutter head. The operator manually removes the mud and installs it. The mud is then taken out when the next shift changes. After the operation is completed, the operator returns to the transition chamber 4. During the operation in the crushing chamber 12, the crushing chamber pressure gauge can be used to monitor the crushing chamber pressure at any time.

[0099] After completing the work, the operator opens the exit door 45 of the transition chamber 4 and enters the transition chamber 4, closes the exit door 45 of the transition chamber 4, and the operator reduces the pressure in the transition chamber 4 in stages. The pressure reduction process is observed through the observation window 8. The flow rate of the reduced pressure gas is controlled by the safety pressure relief valve 53, and the pressure gauge is used to understand the situation in the transition chamber 4 at any time. When the pressure in the transition chamber 4 is reduced to 0, the entrance door of the transition chamber 4 can be opened and the operator can exit the chamber.

[0100] Finally, open the water supply pipe valve to clean the main bin 11, open the drain pipe valve to drain excess water after cleaning, and finally open the crushing bin mud discharge pipe valve 151 to drain mud.

[0101] The above is a detailed introduction to the technical solutions provided by the embodiments of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A gas pressurized sealing and opening device for mud-water balance pipe jacking, characterized by: It includes a baffle assembly installed at the rear end of the main chamber of the pipe jacking machine and the front end of the first pipe section, a transition chamber connected behind the baffle assembly, an air intake device, an exhaust device, and an air pressure monitoring device connecting the pipe jacking machine and the transition chamber, as well as a mud conveying device, a mud discharge device, a water supply device, a drainage device, a communication device, and a cable device connected to the pipe jacking machine.

2. The gas pressurized sealing opening device for mud-water balancing pipe jacking according to claim 1, characterized in that: The air intake device includes a main chamber air intake assembly, a crushing chamber air intake assembly, a spare air intake assembly, a transition chamber air intake assembly, and an air supply device; The main compartment air intake assembly includes a main compartment air intake pipe, a main compartment air intake valve, and a reserved pipe hole for the main compartment air intake valve; The crushing chamber air intake assembly includes a first crushing chamber air intake pipe, a second crushing chamber air intake pipe, a crushing chamber air intake valve, a crushing chamber air intake valve reserved pipe hole, and a crushing chamber reserved hole; The spare air intake assembly includes a spare air intake pipe, a spare air intake valve, and a reserved pipe hole for the spare air intake valve; The transition chamber air intake assembly includes a transition chamber air intake pipe, a transition chamber air intake valve, and a reserved pipe hole for the transition chamber air intake valve; The main chamber air inlet pipe, the second crushing chamber air inlet pipe, the spare air inlet pipe, and the transition chamber air inlet pipe are connected to the air supply device; The exhaust device includes a reserved pipe hole for the exhaust valve, an exhaust valve, an exhaust pipe, and a safety pressure relief valve; The air pressure monitoring device is a barometer; The mud conveying device includes a first crushing chamber mud conveying pipe, a second crushing chamber mud conveying pipe, a crushing chamber mud conveying pipe valve, and a reserved pipe hole for the crushing chamber mud conveying pipe; The mud discharge device includes a first crushing chamber mud discharge pipe, a second crushing chamber mud discharge pipe, a crushing chamber mud discharge pipe valve, and a reserved pipe hole for the crushing chamber mud discharge pipe; The water supply device includes a first water supply pipe, a second water supply pipe, a water supply pipe valve, and a reserved pipe hole for the water supply pipe; The drainage device includes a first drainage pipe, a second drainage pipe, a drainage pipe valve, and a reserved pipe hole for the drainage pipe; The communication device includes a communication line and a reserved pipe hole for the communication line; The cable device includes a cable and a reserved conduit hole for the cable.

3. The gas pressurized sealing and opening device for mud-water balancing pipe jacking according to claim 2, characterized in that: The outer sides of the reserved pipe holes for the main bin air intake valve, the reserved pipe holes for the crushing bin air intake valve, and the reserved pipe holes for the spare air intake valve are all welded and sealed on the baffle assembly. The outer sides of the reserved pipe holes for the transition bin air intake valve are welded and sealed on the transition bin. There are no less than two reserved pipe holes for the exhaust valve, and the outer sides are welded and sealed on the transition bin and the baffle assembly respectively. The outer sides of the reserved holes for the crushing bin are sealed and installed on the sealing plate between the main bin and the crushing bin of the pipe jacking machine. The inner end of the reserved pipe hole of the main bin air inlet valve is connected to the main bin of the pipe jacking machine, and the outer end thereof is sealed and threadedly connected to the main bin air inlet valve, and the main bin air inlet valve is connected to the main bin air inlet pipe; The inner end of the reserved pipe hole of the crushing bin air inlet valve is connected to one end of the first crushing bin air inlet pipe, and the other end of the first crushing bin air inlet pipe is threadedly connected to the outer end of the reserved hole of the crushing bin, the inner end of the reserved hole of the crushing bin is connected to the crushing bin of the pipe jacking machine, and the outer end of the reserved pipe hole of the crushing bin air inlet valve is sealingly threadedly connected to the crushing bin air inlet valve, and the crushing bin air inlet valve is connected to the second crushing bin air inlet pipe. The crushing bin air inlet valve is also provided with a crushing bin air pressure gauge; The inner end of the reserved pipe hole of the backup air intake valve is connected to the main chamber of the pipe jacking machine, and the outer end thereof is threadedly connected to the backup air intake valve, and the backup air intake valve is connected to the backup air intake pipe; The inner end of the transition chamber air intake reserved pipe hole is connected to the transition chamber, and the outer end thereof is threadedly connected to the transition chamber air intake valve, and the transition chamber air intake valve is connected to the transition chamber air intake pipe; The inner end of the reserved pipe hole of the exhaust valve installed on the transition bin is connected to the transition bin, and the outer end thereof is sealed and threadedly connected to the exhaust valve; the inner end of the reserved pipe hole of the exhaust valve installed on the partition assembly is connected to the main bin of the pipe jacking machine, and the outer end thereof is threadedly connected to the exhaust valve. The exhaust valve is a pressure regulating valve, and the exhaust pipe is connected to the exhaust valve.

4. The gas pressurized, sealed, and opening device for a slurry-water balancing pipe according to claim 2, characterized in that: The outer sides of the reserved pipe holes for the crushing chamber mud delivery pipe, the crushing chamber mud discharge pipe, the water supply pipe, the drainage pipe, the communication line and the cable line are sealed and connected to the partition assembly; The outer end of the reserved pipe hole of the crushing chamber mud delivery pipe is connected to the first crushing chamber mud delivery pipe by a snap buckle, and the inner end of the crushing chamber mud delivery pipe is connected to the second crushing chamber mud delivery pipe by a snap buckle. The outlet of the second crushing chamber mud delivery pipe is connected to the crushing chamber of the pipe jacking machine; a crushing chamber mud delivery pipe valve is installed on the second crushing chamber mud delivery pipe; The inner end of the reserved pipe hole of the crushing chamber mud discharge pipe is connected to the first crushing chamber mud discharge pipe by a clip, the inlet of the first crushing chamber mud discharge pipe is connected to the crushing chamber of the pipe jacking machine, a crushing chamber mud discharge pipe valve is installed on the first crushing chamber mud discharge pipe, and the outer end of the reserved pipe hole of the crushing chamber mud discharge pipe is connected to the second crushing chamber mud discharge pipe by a clip; The outer end of the reserved pipe hole of the water supply pipe is connected to the water supply pipe valve, the water supply pipe valve is connected to the first water supply pipe, the inner end of the reserved pipe hole of the water supply pipe is bonded and connected to the second water supply pipe, and the second water supply pipe is in the main compartment of the pipe jacking machine; The inner end of the reserved pipe hole of the drainage pipe is bonded and connected to the first drainage pipe, the first drainage pipe is in the main chamber of the pipe jacking machine, the outer end of the reserved pipe hole of the drainage pipe is connected to the drainage pipe valve, and the drainage pipe valve is connected to the second drainage pipe; The communication line and the cable line respectively pass through the reserved pipe holes for the communication line and the reserved pipe holes for the cable line and enter the main chamber and the crushing chamber of the pipe jacking machine to be connected with the monitoring equipment and the electrical equipment.

5. The gas pressurized sealing and opening device for mud-water balancing pipe jacking according to claim 1, characterized in that: The partition assembly is sealed to the transition chamber via a flange.

6. A slurry balance pipe jacking gas pressurized sealing opening device according to claim 1 or 4, characterized in that: The transition bin is provided with an entry door and an exit door, both of which are hingedly connected to the transition bin on one side, and the exit door of the transition bin leads to the main bin of the pipe jacking machine; seals are provided at the closing part between the entry door and the transition bin, and at the closing part between the exit door and the partition assembly. After the entry door is closed, its four corners are fixed by bolts, and the exit door is opened and closed by rotating the door handle.

7. The gas pressurized, sealed, and opening device for a slurry-water balancing pipe according to claim 2, characterized in that: There are multiple safety pressure relief valves, which are respectively installed on the transition chamber and the partition assembly. The safety pressure relief valve is a one-way valve that adjusts the internal air pressure of the transition chamber and the main chamber of the pipe jacking machine. A pressure gauge is provided near each safety pressure relief valve, and the pressure gauge is respectively threadedly connected to the transition chamber and the partition assembly through a retractable hose.

8. The gas pressurized, sealed, and opening device for slurry-water balancing pipe jacking according to claim 1, characterized in that: The transition chamber and the partition assembly are both provided with observation windows.

9. The gas pressurized sealing and opening device for mud-water balancing pipe jacking according to claim 1, characterized in that: A working platform is provided at the bottom of the transition warehouse; The partition assembly is composed of a plurality of partitions and reinforcing ribs and is a steel structural member.

10. The gas pressurized, sealed, and opening device for slurry-water balancing pipe jacking according to claim 2, characterized in that: The air supply device includes an air compressor, an emergency air compressor, an air storage tank, and a compressed air dryer. The air compressor and the emergency air compressor are both connected to the air storage tank, and the air storage tank is connected to the compressed air dryer. The main bin air inlet pipe, the transition bin air inlet pipe, the second crushing bin air inlet pipe, and the spare air inlet pipe are all connected to the compressed air dryer.

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