A shield machine propulsion hydraulic system for synchronous assembly during tunneling

Abstract

The present invention discloses a shield machine propulsion hydraulic system for synchronous assembly of tunneling, comprising a hydraulic integrated valve group, a propulsion pump source and an assembly pump source; in the oil cylinder assembly mode, the two assembly pump sources are respectively connected to the first assembly mode oil supply port and the second assembly mode oil supply port to supply oil to the hydraulic integrated valve group; in the propulsion mode, the propulsion pump source is connected to the propulsion mode oil supply port to supply oil to the hydraulic integrated valve group. The shield machine propulsion hydraulic system for synchronous assembly of tunneling of the present invention solves the problem that the shield machine propulsion hydraulic system existing in the prior art cannot meet the requirements of synchronous assembly of tunneling.

Description

Technical Field

[0001] The invention relates to a shield machine propulsion hydraulic system for tunneling synchronous assembly. Background Art

[0002] The shield machine is a high-tech tunnel construction equipment that integrates multiple modern technologies such as mechanics, electrical, hydraulics, and sensors. It is widely used in underground engineering construction such as subways, towns, railways, roads, water conservancy, and mines.

[0003] The shield machine propulsion hydraulic system has two main functions, one is responsible for propulsion, and the other is to assist in segment assembly. The two functions of the traditional shield machine propulsion hydraulic system cannot work at the same time. The assembly must be stopped during propulsion, and the propulsion must be stopped during assembly. The shield machine cannot achieve continuous excavation, which limits the efficiency of tunnel construction. Summary of the invention

[0004] The purpose of the present invention is to provide a shield machine propulsion hydraulic system for synchronous assembly during tunneling, aiming to solve the above-mentioned problems through the system.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is to design a shield machine propulsion hydraulic system for synchronous excavation assembly, including a hydraulic integrated valve group, a propulsion pump source and an assembly pump source; the hydraulic integrated valve group is externally connected to the shield machine propulsion cylinder, and the shield machine propulsion cylinder includes a cylinder rodless chamber and a cylinder rod chamber; the hydraulic integrated valve group includes an oil inlet joint, an intermediate joint and a tail joint; there are several intermediate joints, and several intermediate joints and oil inlet joints are connected in series in any order; there are two tail joints, and they are respectively connected to the two outermost intermediate joints;

[0006] The oil inlet is provided with a propulsion mode oil supply port, a first assembly mode oil supply port, and a second assembly mode oil supply port on the outside of the oil inlet; the oil inlet hydraulic components are provided inside the oil inlet, and the oil inlet hydraulic components include a normally open electromagnetic two-way ball valve, a first normally closed electromagnetic two-way ball valve, a manual ball valve, a first proportional pressure reducing valve, and a first check valve;

[0007] The intermediate link is provided with an oil inlet and return port of the rodless chamber of the cylinder and an oil inlet and return port of the rod chamber of the cylinder outside, and the oil inlet and return port of the rodless chamber of the cylinder and the oil inlet and return port of the rod chamber of the cylinder are connected to the rodless chamber of the cylinder and the rod chamber of the cylinder respectively; the intermediate link is provided with an intermediate link hydraulic element inside, and the intermediate link hydraulic element includes a first pilot electromagnetic ball valve, a two-way cartridge valve with a seal, a first two-way cartridge valve, a second two-way cartridge valve, a second pilot electromagnetic ball valve, a normally closed electromagnetic ball valve, a second proportional pressure reducing valve, a second one-way valve, a third two-way cartridge valve, a fourth two-way cartridge valve, and a pilot electromagnetic reversing valve;

[0008] The two tail links are respectively provided with a first valve group oil return port and a second valve group oil return port;

[0009] The oil inlet joint, the middle joint and the tail joint are provided with oil circuits; the oil circuits connect the hydraulic components of the oil inlet joint, the hydraulic components of the middle joint and the oil return ports of the first valve group and the second valve group;

[0010] The propulsion pump source includes a propulsion pump group, a propulsion pump group pressure regulating valve group, a propulsion proportional pressure limiting and flow display valve group, and a filter group; the propulsion pump group and the propulsion pump group pressure regulating valve group are connected through a pipeline, and there are two groups of propulsion pump groups and propulsion pump group pressure regulating valve groups, the two groups of propulsion pump groups and propulsion pump group pressure regulating valve groups are connected in parallel to the propulsion proportional pressure limiting and flow display valve group, and the propulsion proportional pressure limiting and flow display valve group is connected to the filter group;

[0011] The propulsion pump group is a propulsion proportional valve; the propulsion pump group pressure regulating valve group includes a pilot relief valve, an electromagnetic reversing valve, a relief valve, a sequence valve, a manual ball valve, a check valve, and a bypass speed regulating valve; the pilot relief valve, the electromagnetic reversing valve, and the relief valve are connected in series to form a pressure selection valve; the sequence valve, the manual ball valve, and the check valve are connected in series, and the bypass speed regulating valve and the pressure selection valve are connected in parallel on the pipeline at the front end of the sequence valve;

[0012] The propulsion proportional pressure-limiting and flow-displaying valve group is composed of a pilot-operated overflow valve, an electromagnetic reversing valve, a proportional overflow valve, a gear-type flowmeter, a check valve, and a pressure sensor; the pilot-operated overflow valve, the electromagnetic reversing valve, and the proportional overflow valve are connected in series to form a pilot-operated proportional overflow valve; the pilot-operated overflow valve, the gear-type flowmeter, and the check valve are connected in series and connected to a group of propulsion pumps; the front-end oil circuit of the pilot-operated overflow valve is connected to another group of propulsion pumps;

[0013] The filter group is composed of a manual ball valve, a high-pressure filter and a one-way valve in series;

[0014] The assembled pump source includes an assembled pump group, an assembled pump group pressure regulating valve group, and a filter group; the assembled pump group, the assembled pump group pressure regulating valve group, and the filter group are connected through pipelines; and there are two groups of assembled pump sources;

[0015] The assembled pump source is an assembled proportional pump; the assembled pump group pressure regulating valve group is composed of a direct-acting relief valve, a pilot electromagnetic relief valve, a bypass speed regulating valve, a sequence valve, a manual ball valve, and a check valve; the sequence valve, the manual ball valve, and the check valve are connected in series; the direct-acting relief valve, the pilot electromagnetic relief valve, and the bypass speed regulating valve are connected in series on the pipeline at the front end of the sequence valve;

[0016] The filter group is composed of a manual ball valve, a high-pressure filter and a one-way valve in series;

[0017] In the oil cylinder assembly mode, the two assembly pump sources are respectively connected to the first assembly mode oil supply port and the second assembly mode oil supply port to supply oil to the hydraulic integrated valve group;

[0018] In the propulsion mode, the propulsion pump source is connected to the propulsion mode oil supply port to supply oil to the hydraulic integrated valve group.

[0019] Furthermore, in the assembly mode of the oil cylinder extending, the first assembly mode oil supply port and the second assembly mode oil supply port are respectively connected to the second two-way cartridge valve, the first two-way cartridge valve, the oil inlet and return port of the oil cylinder rodless chamber, the shield machine propulsion oil cylinder, the oil inlet and return port of the oil cylinder rod chamber, the third two-way cartridge valve, the oil return port of the first valve group and the oil return port of the second valve group through the oil circuit in sequence; the pilot electromagnetic ball valve is connected to the second two-way cartridge valve;

[0020] In the assembly mode of cylinder retraction, the first assembly mode oil supply port and the second assembly mode oil supply port are respectively connected to the fourth two-way cartridge valve, the cylinder rod chamber oil inlet and return port, the shield machine propulsion cylinder, the cylinder rodless chamber oil inlet and return port, the sealed two-way cartridge valve, the first valve group oil return port and the second valve group oil return port through the oil circuit in sequence; the pilot solenoid reversing valve is connected to the fourth two-way cartridge valve.

[0021] Furthermore, in the propulsion mode, the propulsion mode oil supply port is connected in sequence through the oil circuit to a normally open electromagnetic two-way ball valve, a manual ball valve, a normally closed electromagnetic ball valve, a second proportional pressure reducing valve, a second one-way valve, an oil inlet and return port of a rodless chamber of an oil cylinder, a shield machine propulsion oil cylinder, an oil inlet and return port of a rod chamber of an oil cylinder, a third two-way cartridge valve, an oil return port of a first valve group, and an oil return port of a second valve group.

[0022] Furthermore, in propulsion mode two, the propulsion mode oil supply port is connected in sequence through an oil circuit to the first normally closed electromagnetic two-way ball valve, the first proportional pressure reducing valve, the first check valve, the normally closed electromagnetic ball valve, the second proportional pressure reducing valve, the second check valve, the oil inlet and return port of the rodless chamber of the cylinder, the shield machine propulsion cylinder, the oil inlet and return port of the rod chamber of the cylinder, the third two-way cartridge valve, the oil return port of the first valve group and the oil return port of the second valve group.

[0023] Furthermore, the oil inlet connection is also provided with an oil leakage port, a third one-way valve and a first spare port.

[0024] Furthermore, the intermediate link is also provided with a cylinder rodless chamber pressure sensor interface, a cylinder rodless chamber pressure measuring point-intermediate link, a cylinder rod chamber pressure measuring point, a second spare port, a damping hole, a second normally closed electromagnetic two-way ball valve, a fourth one-way valve, a relief valve, and a pressure sensor.

[0025] Furthermore, the tail joint is also provided with a pilot oil pressure measuring port, a propulsion mode oil supply pressure measuring port, a first assembly mode oil supply pressure measuring port, a second assembly mode oil supply pressure measuring port, and a leakage oil pressure measuring port.

[0026] The advantages and beneficial effects of the present invention are as follows: the shield machine propulsion hydraulic system for synchronous assembly of tunneling solves the problem that the shield machine propulsion hydraulic system in the prior art cannot meet the requirements of synchronous assembly of tunneling. The system is equipped with a separate assembly pump source and a propulsion pump source, and the oil circuits of the propulsion mode and the assembly mode in the tunneling synchronous assembly integrated valve group are also separated, and each oil cylinder has a separate proportional pressure reducing valve for pressure control, so the system can be used for synchronous assembly control of tunneling of shield machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the six sides of the exterior of the present invention.

[0028] Figure 2 It is a three-dimensional schematic diagram of the present invention.

[0029] Figure 3 This is the hydraulic oil path diagram when the cylinder is extended in assembly mode.

[0030] Figure 4 This is the hydraulic oil path diagram when the cylinder retracts in assembly mode.

[0031] Figure 5 Below is the hydraulic oil path diagram for propulsion mode.

[0032] Figure 6 This is the hydraulic oil path diagram in propulsion mode 2.

[0033] Figure 7 Schematic diagram of the propulsion pump source.

[0034] Figure 8 This is a schematic diagram of assembling the pump source.

[0035] Fig. 9 It is the schematic diagram of propulsion mode 1 (tunneling synchronous assembly propulsion mode) and propulsion mode 2 (slow speed propulsion mode). DETAILED DESCRIPTION

[0036] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example

[0037] A shield machine propulsion hydraulic system for synchronous excavation assembly, comprising a hydraulic integrated valve group, a propulsion pump source and an assembly pump source; the hydraulic integrated valve group is externally connected to the shield machine propulsion cylinder, and the shield machine propulsion cylinder C includes a cylinder rodless chamber and a cylinder rod chamber; the hydraulic integrated valve group includes an oil inlet joint D, an intermediate joint E and a tail joint F; there are a plurality of intermediate joints E, and a plurality of intermediate joints E and the oil inlet joints D are connected in series in any order; there are two tail joints F, and they are respectively connected to the two intermediate joints E located at the outermost sides;

[0038] The oil inlet D is provided with a propulsion mode oil supply port P1, a first assembly mode oil supply port P2, and a second assembly mode oil supply port P3 on the outside; the oil inlet D is provided with an oil inlet hydraulic component, which includes a normally open electromagnetic two-way ball valve 1, a first normally closed electromagnetic two-way ball valve 2, a manual ball valve 3, a first proportional pressure reducing valve 4, and a first non-return valve 5;

[0039] The intermediate link E is provided with an oil inlet and return port A of the rodless chamber of the cylinder and an oil inlet and return port B of the rod chamber of the cylinder, and the oil inlet and return port A of the rodless chamber of the cylinder and the oil inlet and return port B of the rod chamber of the cylinder are connected to the rodless chamber of the cylinder and the rod chamber of the cylinder respectively; the intermediate link E is provided with an intermediate link hydraulic element, and the intermediate link hydraulic element includes a first pilot electromagnetic ball valve 14, a two-way cartridge valve with a seal 15, a first two-way cartridge valve 16, a second two-way cartridge valve 17, a second pilot electromagnetic ball valve 18, a normally closed electromagnetic ball valve 21, a second proportional pressure reducing valve 22, a second one-way valve 23, a third two-way cartridge valve 32, a fourth two-way cartridge valve 33, and a pilot electromagnetic reversing valve 34;

[0040] The two tail links F are respectively provided with a first valve group oil return port T1 and a second valve group oil return port T2;

[0041] The oil inlet joint D, the middle joint E and the end joint F are provided with an oil circuit; the oil circuit connects the hydraulic components of the oil inlet joint, the hydraulic components of the middle joint and the oil return port T1 of the first valve group and the oil return port T2 of the second valve group;

[0042] The propulsion pump source includes a propulsion pump group, a propulsion pump group pressure regulating valve group, a propulsion proportional pressure limiting and flow display valve group, and a filter group; the propulsion pump group and the propulsion pump group pressure regulating valve group are connected through a pipeline, and there are two groups of propulsion pump groups and propulsion pump group pressure regulating valve groups, the two groups of propulsion pump groups and propulsion pump group pressure regulating valve groups are connected in parallel to the propulsion proportional pressure limiting and flow display valve group, and the propulsion proportional pressure limiting and flow display valve group is connected to the filter group;

[0043] The propulsion pump group is a propulsion proportional valve 58; its flow rate is proportional to the current input to the proportional pump, and it also has constant power protection and pressure cut-off protection functions; the propulsion pump group pressure regulating valve group includes a pilot relief valve 42, an electromagnetic reversing valve 43, a relief valve 44, a sequence valve 45, a manual ball valve 46, a check valve 47, and a bypass speed regulating valve 48; the pilot relief valve 42, the electromagnetic reversing valve 43, and the relief valve 44 are connected in series to form a pressure selection valve; three-speed pressure selection can be achieved: unloading, excavation synchronous assembly pump source pressure (33Mpa pressure), and non-excavation synchronous assembly pump source pressure (28MPa pressure); the sequence valve 45, the manual ball valve 46, and the check valve 47 are connected in series, and the bypass speed regulating valve 48 is connected in parallel with the pressure selection valve on the pipeline at the front end of the sequence valve 45; one end of the bypass speed regulating valve 48 is connected to the VP oil inlet, and the other end is connected to the VT oil return port. The sequence valve 45, the manual ball valve 46, and the check valve 47 are connected in series and are connected to the VP oil inlet and the VPA oil outlet respectively.

[0044] The propulsion proportional pressure-limiting and flow-displaying valve group is composed of a pilot-operated overflow valve 49, an electromagnetic reversing valve 53, a proportional overflow valve 54, a gear-type flowmeter 50, a check valve 51, and a pressure sensor 52; the pilot-operated overflow valve 49, the electromagnetic reversing valve 53, and the proportional overflow valve 54 are connected in series to form a pilot-operated proportional overflow valve; the pilot-operated overflow valve 49, the gear-type flowmeter 50, and the check valve 51 are connected in series and connected to a group of propulsion pumps; the front-end oil circuit of the pilot-operated overflow valve 49 is connected to another group of propulsion pumps;

[0045] The filter group is composed of a manual ball valve 55, a high-pressure filter 56, and a one-way valve 57 in series;

[0046] Figure 7 Among them, NP1, NP2, NP3 are pressure oil ports, NT is the oil return port, NMP1 is the pressure sensor and pressure gauge interface, VP is the oil inlet, VPA is the oil outlet, VT is the oil return port, VMP1 is the pressure gauge interface, VMP2 is the pressure gauge interface, VL is the leakage oil port; VS is the oil suction port, VT1 is the oil leakage port, and VA is the pressure oil outlet. The three oil ports of the propulsion proportional valve 58 are VS as the oil suction port, VT1 as the oil leakage port, and VA as the pressure oil outlet; the propulsion proportional pump 58 has electric proportional displacement, pressure cut-off and constant power adjustment.

[0047] The assembled pump source includes an assembled pump group, an assembled pump group pressure regulating valve group, and a filter group; the assembled pump group, the assembled pump group pressure regulating valve group, and the filter group are connected through pipelines; and there are two groups of assembled pump sources;

[0048] The assembled pump source is an assembled proportional pump 61; the assembled pump group pressure regulating valve group is composed of a direct-acting relief valve 62, a pilot electromagnetic relief valve 63, a bypass speed regulating valve 64, a sequence valve 65, a manual ball valve 66, and a check valve 67; the sequence valve 65, the manual ball valve 66, and the check valve 67 are connected in series; the direct-acting relief valve 62, the pilot electromagnetic relief valve 63, and the bypass speed regulating valve 64 are connected in parallel to the pipeline at the front end of the sequence valve 65;

[0049] The filter group is composed of a manual ball valve 68, a high-pressure filter 69, and a one-way valve 70 in series;

[0050] Figure 8 Among them, ES is the oil suction port, ET1 is the oil drain port, EA is the pressure oil outlet, and the three oil ports are the three oil ports of the propulsion proportional pump 61. The propulsion proportional pump 61 has electric proportional displacement, pressure cut-off and constant power adjustment. EP is the oil inlet, EPA is the oil outlet, ET is the oil return port, EMP1 is the pressure gauge interface, EMP2 is the pressure gauge interface, and EL is the leakage oil port; one end of the direct-acting relief valve 62 is connected to the EP oil inlet, and the other end is connected to the ET oil return port. One end of the bypass speed regulating valve 64 is connected to the EP oil inlet, and the other end is connected to the ET oil return port. After the sequence valve 65, the manual ball valve 66, and the one-way valve 67 are connected in series, they are connected to the EP oil inlet and the EPA oil outlet respectively.

[0051] In the oil cylinder assembly mode, the two assembly pump sources are respectively connected to the first assembly mode oil supply port P2 and the second assembly mode oil supply port P3 to supply oil to the hydraulic integrated valve group;

[0052] In propulsion mode, the propulsion pump source is connected to the propulsion mode oil supply port P1 to supply oil to the hydraulic integrated valve group.

[0053] In the assembly mode of the oil cylinder extending, the first assembly mode oil supply port P2 and the second assembly mode oil supply port P3 are respectively connected to the second two-way cartridge valve 17, the first two-way cartridge valve 16, the oil cylinder rodless chamber oil inlet and return port A, the shield machine propulsion cylinder C, the oil cylinder rod chamber oil inlet and return port B, the third two-way cartridge valve 32, the first valve group oil return port T1 and the second valve group oil return port T2 through the oil circuit; the second pilot electromagnetic ball valve 18 is connected to the second two-way cartridge valve 17;

[0054] In the assembly mode of cylinder retraction, the first assembly mode oil supply port P2 and the second assembly mode oil supply port P3 are respectively connected to the fourth two-way cartridge valve 33, the cylinder rod chamber oil inlet and return port B, the shield machine propulsion cylinder C, the cylinder rodless chamber oil inlet and return port A, the sealed two-way cartridge valve 15, the first valve group oil return port T1 and the second valve group oil return port T2 through the oil circuit in sequence; the pilot solenoid reversing valve 34 is connected to the fourth two-way cartridge valve 33.

[0055] In propulsion mode one (tunneling synchronous assembly propulsion mode), the propulsion mode oil supply port P1 is connected in sequence through the oil circuit to the normally open electromagnetic two-way ball valve 1, the manual ball valve 3, the normally closed electromagnetic ball valve 21, the second proportional pressure reducing valve 22, the second one-way valve 23, the oil inlet and return port A of the rodless chamber of the cylinder, the shield machine propulsion cylinder C, the oil inlet and return port B of the rod chamber of the cylinder, the third two-way cartridge valve 32, the oil return port T1 of the first valve group and the oil return port T2 of the second valve group.

[0056] In propulsion mode 2 (slow-speed propulsion mode), the propulsion mode oil supply port P1 is connected in sequence through the oil circuit to the first normally closed electromagnetic two-way ball valve 2, the first proportional pressure reducing valve 4, the first check valve 5, the normally closed electromagnetic ball valve 21, the second proportional pressure reducing valve 22, the second check valve 23, the oil inlet and return port A of the rodless chamber of the cylinder, the shield machine propulsion cylinder C, the oil inlet and return port B of the rod chamber of the cylinder, the third two-way cartridge valve 32, the oil return port T1 of the first valve group and the oil return port T2 of the second valve group.

[0057] The oil inlet connection D is also provided with an oil leakage port L, a third one-way valve 6 and a first standby port X.

[0058] The intermediate link E is also provided with a cylinder rodless chamber pressure sensor interface MA1, a cylinder rodless chamber pressure measuring point - intermediate link MA2, a cylinder rod chamber pressure measuring point MB, a second spare port E, a damping hole 11, a second normally closed electromagnetic two-way ball valve 12, a fourth one-way valve 13, a relief valve 31, and a pressure sensor 41.

[0059] The tail link F is also provided with a pilot oil pressure measuring port MSt, a propulsion mode oil supply pressure measuring port MP1, a first assembly mode oil supply pressure measuring port MP2, a second assembly mode oil supply pressure measuring port MP3, and a leakage oil pressure measuring port MLND.

[0060] Oil circuit in assembly mode: The oil supply in assembly mode enters from the first assembly mode oil supply port P2 and the second assembly mode oil supply port P3. When the cylinder extends, the second pilot solenoid ball valve 18 is energized, and the hydraulic oil passes through the second two-way cartridge valve 17 and the first two-way cartridge valve 16. The hydraulic oil in the rod chamber of the cylinder enters the return oil port B through the rod chamber of the cylinder, and then flows back to the first valve group oil return port T1 and the second valve group oil return port T2 through the third two-way cartridge valve 32, and then returns to the oil tank. When the oil cylinder retracts, the pilot solenoid reversing valve 34 is energized, and the hydraulic oil of the first assembly mode oil supply port P2 and the second assembly mode oil supply port P3 reaches the oil inlet and return port B of the rod chamber of the oil cylinder through the fourth two-way cartridge valve 33, and then reaches the rod chamber of the oil cylinder. The first pilot solenoid ball valve 14 is energized, and the hydraulic oil of the rodless chamber of the oil cylinder reaches the oil inlet and return port A of the rodless chamber of the oil cylinder, and then reaches the oil return port T1 of the first valve group and the oil return port T2 of the second valve group through the sealed two-way cartridge valve 15, and then returns to the oil tank.

[0061] Propulsion mode mode 1 oil circuit: The propulsion mode oil supply enters from the propulsion mode oil supply port P1, passes through the normally open electromagnetic two-way ball valve 1, the manual ball valve 3, the normally closed electromagnetic ball valve 21, the second proportional pressure reducing valve 22, and the second one-way valve 23 to reach the cylinder rodless chamber oil inlet and return port A of the valve group, and then reaches the rodless chamber of the cylinder, the propulsion cylinder extends, and the rod chamber of the propulsion cylinder returns oil to the cylinder rod chamber oil inlet and return port B, and then reaches the first valve group oil return port T1 and the second valve group oil return port T2 from the third two-way cartridge valve 32, and then returns to the oil tank.

[0062] Propulsion mode mode 2 oil circuit: The propulsion mode oil supply enters from the propulsion mode oil supply port P1, passes through the first normally closed electromagnetic two-way ball valve 2, the first proportional pressure reducing valve 4, the first non-return valve 5, the normally closed electromagnetic ball valve 21, the second proportional pressure reducing valve 22, and the second non-return valve 23 to reach the cylinder rodless chamber oil inlet and return port A of the valve group, and then reaches the rodless chamber of the cylinder, the propulsion cylinder extends, and the rod chamber of the propulsion cylinder returns oil to the cylinder rod chamber oil inlet and return port B, and then reaches the first valve group oil return port T1 and the second valve group oil return port T2 from the third two-way cartridge valve 32, and then returns to the oil tank.

[0063] like Fig. 9 , which is the schematic diagram of propulsion mode 1 (tunneling synchronous assembly propulsion mode) and propulsion mode 2 (slow speed propulsion mode).

[0064] During synchronous assembly of tunneling, some propulsion cylinders participate in propulsion, while others do not. The propulsion cylinders that do not participate in propulsion are powered off by the electromagnetic two-way ball valve 21 on the synchronous assembly integrated valve group of tunneling. The propulsion cylinders that do not participate in propulsion can realize telescopic action to assist segment assembly under the oil supply of the assembly pump source. Propulsion mode during synchronous assembly of tunneling: The propulsion pump source part provides stable and adjustable pump source pressure and sufficient flow, wherein the stable and adjustable pump source pressure is provided by the pilot proportional relief valve composed of the pilot relief valve 49, the electromagnetic reversing valve 53, and the proportional relief valve 54, and the sufficient flow is achieved by the propulsion proportional pump 58 and the gear flowmeter 50. The oil supply of the propulsion mode goes through the electromagnetic two-way ball valve 1 and the manual ball valve 3 in the synchronous assembly integrated valve group of tunneling, and directly reaches the electromagnetic two-way ball valve 21, the second proportional pressure reducing valve 22, and the one-way valve 23 in the middle of the valve group. The oil circuit of this propulsion mode bypasses the electromagnetic two-way ball valve 2, the first proportional pressure reducing valve 4, and the one-way valve 5. In this mode, the pump source pressure is stable, the flow is sufficient, and the proportional pressure reducing valves of each propulsion cylinder can freely set the pressure. By setting the propulsion pressure of each cylinder through an algorithm, the thrust and torque balance of the shield machine can be achieved when the propulsion cylinders in the multi-assembly mode do not participate in the propulsion.

[0065] During synchronous assembly of tunneling, each propulsion cylinder involved in the propulsion is controlled by a separate second proportional pressure reducing valve 22. The flow through the proportional pressure reducing valve is small. When the propulsion speed is relatively low, the flow through the proportional pressure reducing valve is even smaller, which may cause unstable propulsion pressure. For this reason, a micro-speed propulsion mode is also designed in the system. The micro-speed propulsion mode is not used for synchronous assembly of tunneling, but is used to return to conventional partition propulsion to solve the problem of unstable micro-speed propulsion pressure. Micro-speed propulsion mode: The propulsion pump source provides a stable flow, which is provided by the propulsion proportional pump 58, and the propulsion pump source provides a pressure-limiting pressure, which is provided by the pilot proportional relief valve composed of the pilot relief valve 49, the electromagnetic reversing valve 53, and the proportional relief valve 54. The oil supply of this propulsion mode directly reaches the electromagnetic two-way ball valve 21, the second proportional pressure reducing valve 22, and the one-way valve 23 in the middle of the valve group in the synchronous assembly of tunneling in the integrated valve group. This propulsion mode bypasses the oil circuit of the electromagnetic two-way ball valve 1 and the manual ball valve 3. In this mode, the pressure value of the second proportional pressure reducing valve 22 should be set to the maximum, which is equivalent to normal operation. The propulsion control has returned to the traditional group control, and the pressure of the propulsion cylinder of each group is also centrally controlled by the proportional pressure reducing valve. Since the first proportional pressure reducing valve 4 controls multiple cylinders, the flow through it is large, and there will be no problem of unstable pressure.

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A shield machine propulsion hydraulic system for synchronous assembly during tunneling, characterized in that: It includes a hydraulic integrated valve group, a propulsion pump source and an assembled pump source; the hydraulic integrated valve group is externally connected to the shield machine propulsion cylinder, and the shield machine propulsion cylinder includes a cylinder rodless chamber and a cylinder rod chamber; the hydraulic integrated valve group includes an oil inlet joint, an intermediate joint and a tail joint; there are several intermediate joints, and several intermediate joints and oil inlet joints are connected in series in any order; there are two tail joints, and they are respectively connected to the two outermost intermediate joints; The oil inlet is provided with a propulsion mode oil supply port, a first assembly mode oil supply port, and a second assembly mode oil supply port on the outside of the oil inlet; the oil inlet hydraulic components are provided inside the oil inlet, and the oil inlet hydraulic components include a normally open electromagnetic two-way ball valve, a first normally closed electromagnetic two-way ball valve, a manual ball valve, a first proportional pressure reducing valve, and a first check valve; The intermediate link is provided with an oil inlet and return port of the rodless chamber of the cylinder and an oil inlet and return port of the rod chamber of the cylinder outside, and the oil inlet and return port of the rodless chamber of the cylinder and the oil inlet and return port of the rod chamber of the cylinder are connected to the rodless chamber of the cylinder and the rod chamber of the cylinder respectively; the intermediate link is provided with an intermediate link hydraulic element inside, and the intermediate link hydraulic element includes a first pilot electromagnetic ball valve, a two-way cartridge valve with a seal, a first two-way cartridge valve, a second two-way cartridge valve, a second pilot electromagnetic ball valve, a normally closed electromagnetic ball valve, a second proportional pressure reducing valve, a second one-way valve, a third two-way cartridge valve, a fourth two-way cartridge valve, and a pilot electromagnetic reversing valve; The two tail links are respectively provided with a first valve group oil return port and a second valve group oil return port; The oil inlet joint, the middle joint and the tail joint are provided with oil circuits; the oil circuits connect the hydraulic components of the oil inlet joint, the hydraulic components of the middle joint and the oil return ports of the first valve group and the second valve group; The propulsion pump source includes a propulsion pump group, a propulsion pump group pressure regulating valve group, a propulsion proportional pressure limiting and flow display valve group, and a filter group; the propulsion pump group and the propulsion pump group pressure regulating valve group are connected through a pipeline, and there are two groups of propulsion pump groups and propulsion pump group pressure regulating valve groups, the two groups of propulsion pump groups and propulsion pump group pressure regulating valve groups are connected in parallel to the propulsion proportional pressure limiting and flow display valve group, and the propulsion proportional pressure limiting and flow display valve group is connected to the filter group; The propulsion pump group is a propulsion proportional valve; the propulsion pump group pressure regulating valve group includes a pilot relief valve, an electromagnetic reversing valve, a relief valve, a sequence valve, a manual ball valve, a check valve, and a bypass speed regulating valve; the pilot relief valve, the electromagnetic reversing valve, and the relief valve are connected in series to form a pressure selection valve; the sequence valve, the manual ball valve, and the check valve are connected in series, and the bypass speed regulating valve and the pressure selection valve are connected in parallel on the pipeline at the front end of the sequence valve; The propulsion proportional pressure-limiting and flow-displaying valve group is composed of a pilot-operated overflow valve, an electromagnetic reversing valve, a proportional overflow valve, a gear-type flowmeter, a check valve, and a pressure sensor; the pilot-operated overflow valve, the electromagnetic reversing valve, and the proportional overflow valve are connected in series to form a pilot-operated proportional overflow valve; the pilot-operated overflow valve, the gear-type flowmeter, and the check valve are connected in series and connected to a group of propulsion pumps; the front-end oil circuit of the pilot-operated overflow valve is connected to another group of propulsion pumps; The filter group is composed of a manual ball valve, a high-pressure filter and a one-way valve in series; The assembled pump source includes an assembled pump group, an assembled pump group pressure regulating valve group, and a filter group; the assembled pump group, the assembled pump group pressure regulating valve group, and the filter group are connected through pipelines; and there are two groups of assembled pump sources; The assembled pump source is an assembled proportional pump; the assembled pump group pressure regulating valve group is composed of a direct-acting relief valve, a pilot electromagnetic relief valve, a bypass speed regulating valve, a sequence valve, a manual ball valve, and a check valve; the sequence valve, the manual ball valve, and the check valve are connected in series; the direct-acting relief valve, the pilot electromagnetic relief valve, and the bypass speed regulating valve are connected in parallel on the pipeline at the front end of the sequence valve; The filter group is composed of a manual ball valve, a high-pressure filter and a one-way valve in series; In the oil cylinder assembly mode, the two assembly pump sources are respectively connected to the first assembly mode oil supply port and the second assembly mode oil supply port to supply oil to the hydraulic integrated valve group; In the propulsion mode, the propulsion pump source is connected to the propulsion mode oil supply port to supply oil to the hydraulic integrated valve group.

2. A shield machine propulsion hydraulic system for synchronous assembly during tunneling according to claim 1, characterized in that: In the assembly mode of the oil cylinder extending, the first assembly mode oil supply port and the second assembly mode oil supply port are respectively connected to the second two-way cartridge valve, the first two-way cartridge valve, the oil inlet and return port of the oil cylinder rodless chamber, the shield machine propulsion oil cylinder, the oil inlet and return port of the oil cylinder rod chamber, the third two-way cartridge valve, the first valve group oil return port and the second valve group oil return port through the oil circuit in sequence; the pilot electromagnetic ball valve is connected to the second two-way cartridge valve; In the assembly mode of cylinder retraction, the first assembly mode oil supply port and the second assembly mode oil supply port are respectively connected to the fourth two-way cartridge valve, the cylinder rod chamber oil inlet and return port, the shield machine propulsion cylinder, the cylinder rodless chamber oil inlet and return port, the sealed two-way cartridge valve, the first valve group oil return port and the second valve group oil return port through the oil circuit in sequence; the pilot solenoid reversing valve is connected to the fourth two-way cartridge valve.

3. A shield machine propulsion hydraulic system for synchronous excavation assembly according to claim 1, characterized in that: In the propulsion mode, the propulsion mode oil supply port is connected in sequence through the oil circuit to the normally open electromagnetic two-way ball valve, the manual ball valve, the normally closed electromagnetic ball valve, the second proportional pressure reducing valve, the second one-way valve, the oil inlet and return port of the rodless chamber of the cylinder, the shield machine propulsion cylinder, the oil inlet and return port of the rod chamber of the cylinder, the third two-way cartridge valve, the oil return port of the first valve group and the oil return port of the second valve group.

4. The shield machine propulsion hydraulic system for synchronous excavation assembly according to claim 1, characterized in that: In propulsion mode two, the propulsion mode oil supply port is connected in sequence through an oil circuit to the first normally closed electromagnetic two-way ball valve, the first proportional pressure reducing valve, the first check valve, the normally closed electromagnetic ball valve, the second proportional pressure reducing valve, the second check valve, the oil inlet and return port of the rodless chamber of the cylinder, the shield machine propulsion cylinder, the oil inlet and return port of the rod chamber of the cylinder, the third two-way cartridge valve, the oil return port of the first valve group and the oil return port of the second valve group.

5. The shield machine propulsion hydraulic system for synchronous excavation assembly according to claim 1, characterized in that: The oil inlet connection is also provided with an oil leakage port, a third one-way valve and a first spare port.

6. The shield machine propulsion hydraulic system for synchronous excavation assembly according to claim 1, characterized in that: The intermediate link is also provided with a cylinder rodless cavity pressure sensor interface, a cylinder rodless cavity pressure measuring point-intermediate link, a cylinder rod cavity pressure measuring point, a second spare port, a damping hole, a second normally closed electromagnetic two-way ball valve, a fourth one-way valve, a relief valve, and a pressure sensor.

7. The shield machine propulsion hydraulic system for synchronous excavation assembly according to claim 1, characterized in that: The tail joint is also provided with a pilot oil pressure measuring port, a propulsion mode oil supply pressure measuring port, a first assembly mode oil supply pressure measuring port, a second assembly mode oil supply pressure measuring port, and a leakage oil pressure measuring port.

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