Shield tunneling machine emergency platform and hydraulic control system thereof

Abstract

The utility model discloses a shield tunneling machine emergency platform and a hydraulic control system, and solves the problem that a shield tunneling machine emergency platform in the prior art is not easy to operate in case of power failure emergency. The emergency platform of the shield tunneling machine comprises an emergency vehicle platform, the emergency platform is in sliding connection with a trailer through a translation oil cylinder, a pulley block is arranged on the trailer, and the emergency platform is connected with a lifting oil cylinder arranged on the trailer through a steel wire rope. An emergency oil source in the hydraulic control system is connected with a lifting oil cylinder through a first hand-operated direction valve and a pipeline to control the ascending action of the emergency platform; the emergency oil source is connected with the lifting oil cylinder through a second hand-operated direction valve and a pipeline to control the descending action of the emergency platform; and the emergency oil source is connected with the translation oil cylinder through a third hand-operated direction valve and a pipeline to control the translation action of the emergency platform. By the adoption of the manual hydraulic emergency control system, the problems that in the prior art, an emergency power source-manual pump is low in efficiency, poor in precision and the like are solved, and the whole system is easier to operate and more stable and efficient in running.

Description

[0001] An emergency platform for a shield tunneling machine and a hydraulic control system thereof TECHNICAL FIELD

[0002] The utility model relates to a shield tunneling machine technical field, especially in kind a shield tunneling machine emergency platform. BACKGROUND

[0003] During the shield construction process, there is a certain risk. In order to deal with emergencies and protect the personal safety of construction personnel, an emergency escape vehicle is configured, the emergency escape vehicle is placed on an emergency vehicle lifting platform, and the emergency platform is stored on a trailer platform. The emergency vehicle lifting platform is a common configuration of the shield tunneling machine. Under normal circumstances, it is placed on the trailer for storing emergency vehicles. Its purpose is that if an unexpected accident occurs during the tunneling construction process, the emergency vehicle can be lowered to the tunnel ground by using the platform, and the construction personnel can quickly escape from the dangerous scene by using the emergency vehicle. At present, the emergency platform lifting is controlled by electricity. Considering that the power supply may be interrupted under special circumstances, the emergency vehicle cannot be lowered. Therefore, in order to prevent the power supply from being interrupted in an emergency, causing the emergency vehicle to be unable to be lowered and driven away, a shield tunneling machine emergency platform and a corresponding manual hydraulic control system are designed. Even in the case of power failure in an emergency, the construction personnel can manually control the platform to lower the emergency vehicle to the road surface, so as to drive away from the dangerous scene.

[0004] At present, there are mainly three kinds of similar emergency manual hydraulic system technical solutions:

[0005] The first kind is a green and environment-friendly small-tonnage variable-frequency induction furnace hydraulic emergency manual system with the application number CN201720568163.9. The technical solution mainly describes a furnace hydraulic emergency manual system. The system mainly includes a hydraulic oil tank, an explosion-proof valve, an actuator hydraulic oil cylinder, and a power source manual pump. When the equipment fails or the power supply is interrupted, the manual emergency system is started. The furnace action is controlled by the manual pump. The scheme can be remotely manually controlled in the case of an emergency. The disadvantage is that the efficiency is low.

[0006] The second kind is a manual hydraulic emergency system for an explosion-proof electric aerial work platform with the application number CN201420396411.2. The technical solution mainly describes a manual hydraulic emergency system for an explosion-proof electric aerial work platform. The system includes a cylinder device, a rotary motor device, a manual pump device, and related circuits and valve groups. The operation and control of the aerial work platform by the manual pump can manually lower the working platform in the case of complete power loss, thereby increasing the safety and reliability of the aerial work platform. The disadvantage is that multiple people need to operate simultaneously and the efficiency is low.

[0007] Third, the patent number 202022234586.1, a kind of passenger elevator car manual pump station emergency system, the technical scheme is mainly composed of manual pump, oil cylinder lift reversing valve, clutch control ball valve, car brake ball valve, oil tank etc., provide a new manual pump station emergency system, mainly solve the existing manual pump station under the condition of power failure through manual pump control car brake, under the condition of power failure, the problem that car cannot move.

[0008] In view of the low efficiency of manual pump and the inconvenience of needing to operate the valve group synchronously, in combination with the actual situation in the field of shield construction, it is necessary to design a shield machine emergency platform manual hydraulic control system. Utility model content

[0009] In view of the deficiencies in the above background art, the utility model provides a shield machine emergency platform and a hydraulic control system thereof, which solve the problems of slow operation and slow action of the existing shield emergency platform in the event of power failure.

[0010] The technical scheme of the utility model is as follows: a shield machine emergency platform, comprising an emergency platform arranged on a trailer and used for carrying an emergency trolley, the emergency platform being slidably connected to the trailer through a translation oil cylinder arranged along the tunneling direction of the trailer, and the emergency platform being connected to a lifting oil cylinder arranged on the trailer.

[0011] Specifically, the trailer is provided with a pulley block, the emergency platform is connected to the lifting oil cylinder arranged on the trailer through a steel wire rope matched with the pulley block, the lifting oil cylinder is extended, the emergency platform with the emergency trolley is lowered, the lifting oil cylinder is retracted, the emergency platform with the emergency trolley is raised, and the emergency platform with the emergency trolley moves to the middle of the trailer when the translation oil cylinder is extended.

[0012] Further preferably, four hooks are symmetrically arranged on the emergency platform, one end of the steel wire rope is connected to the hook, and the other end of the steel wire rope is connected to the piston rod of the lifting oil cylinder, and the translation oil cylinder is a double-stage cylinder.

[0013] A hydraulic control system of the shield machine emergency platform, an emergency oil source is connected to the lifting oil cylinder through a first manual reversing valve and a pipeline to control the lifting action of the emergency platform, the emergency oil source is connected to the lifting oil cylinder through a second manual reversing valve and a pipeline to control the lowering action of the emergency platform, the emergency oil source is connected to the translation oil cylinder through a third manual reversing valve and a pipeline to control the translation action of the emergency platform, a conventional oil source is connected to the lifting oil cylinder through a first valve group, and the conventional oil source is connected to the translation oil cylinder through a second valve group.

[0014] Further preferably, the emergency oil source is provided by an accumulator, the accumulator is connected with the first hand-operated reversing valve, the second hand-operated reversing valve and the third hand-operated reversing valve through an emergency pipeline respectively, and a safety valve of the accumulator is arranged on the emergency pipeline.

[0015] Further preferably, a first balance valve is arranged on the pipeline between the first hand-operated reversing valve and the lifting oil cylinder, an oil outlet of the first balance valve is connected with a rod cavity of the lifting oil cylinder through a first oil inlet pipeline, an oil return port of the first balance valve is connected with a rodless cavity of the lifting oil cylinder through a first oil return pipeline, and a first ball valve is arranged on the pipeline through which the emergency oil source enters the first hand-operated reversing valve.

[0016] Further preferably, a second balance valve is arranged on the pipeline between the second hand-operated reversing valve and the lifting oil cylinder, an oil outlet of the second balance valve is connected with a rodless cavity of the lifting oil cylinder through a second oil inlet pipeline, an oil return port of the second balance valve is connected with a rod cavity of the lifting oil cylinder through a second oil return pipeline, and a second ball valve is arranged on the pipeline through which the emergency oil source enters the second hand-operated reversing valve. The second oil inlet pipeline is connected with an oil return tank through an oil supplement branch, and a second one-way valve is arranged on the oil supplement branch.

[0017] Further preferably, a third balance valve is arranged on the pipeline between the third hand-operated reversing valve and the translation oil cylinder, an oil outlet of the third balance valve is connected with a rod cavity of the translation oil cylinder through a third oil inlet pipeline, an oil return port of the third balance valve is connected with a rodless cavity of the translation oil cylinder through a third oil return pipeline, and a fourth ball valve is arranged on the pipeline through which the emergency oil source enters the third hand-operated reversing valve.

[0018] Further preferably, the first valve group comprises a first pressure reducing valve, a first electromagnetic reversing valve, a first throttle valve and a fourth balance valve arranged in series along an oil inlet direction, a third ball valve is arranged on the pipeline through which the normal oil source enters the first pressure reducing valve, and a fifth one-way valve is arranged on the supplement oil path through which the normal oil source enters the accumulator.

[0019] Further preferably, the second valve group comprises a second pressure reducing valve, a second electromagnetic reversing valve, a second throttle valve and a fifth balance valve arranged in series along an oil inlet direction, a fifth ball valve is arranged on the pipeline through which the normal oil source enters the second pressure reducing valve, and a seventh one-way valve is arranged on the supplement oil path through which the normal oil source enters the accumulator.

[0020] The utility model discloses a beneficial effect is: the utility model discloses shield machine emergency platform control structure is simple and effective, ensures that the emergency platform and its on emergency car move smoothly. Shield machine emergency platform manual hydraulic control system adopts energy accumulator as power source, two -stage telescopic cylinder is the actuating mechanism, and through the handle reversing valve is control mechanism, realizes the function of manual quick putting down emergency car, solves the problem of slow action of not easy operation when meeting power failure emergency in prior art. Adopt 3 manual valves and operate in order, ensure the accuracy of action under emergency; this anti -misoperation design improves the security of emergency system. The system can realize that the storage hydraulic power energy is in energy accumulator under normal circumstances, and can move three manual emergency reversing valve handles in turn under the emergency power -free state, realizes that the emergency trolley is stably, efficiently and accurately put down to the tunnel ground target position. Compared with prior art, adopt this manual hydraulic emergency control system, solve the problem of low efficiency of emergency power source - manual pump, oil flow cannot be stably controlled, poor precision in prior art, at the same time, make the whole system operation more simple, and the system operation is more stable and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the utility model embodiments, the following will be needed to use the drawings in the embodiment description briefly introduced, obviously, the following description in the drawings is only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0022] Figure 1 It is the front view schematic diagram of the utility model shield machine emergency platform.

[0023] Figure 2 It is the side view schematic diagram of the utility model shield machine emergency platform.

[0024] Figure 3 It is the hydraulic control system schematic diagram of the utility model. DETAILED DESCRIPTION

[0025] The technical scheme in the utility model embodiments will be described clearly and completely in the following with the drawings in the utility model embodiments, obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without paying creative labor belong to the range of protection of the utility model.

[0026] As Figure 1 , 2As shown in Example 1, a shield machine emergency platform includes an emergency vehicle platform 200 arranged on a trailer 5 and used to carry an emergency vehicle 100; the emergency platform drives the emergency vehicle to move synchronously. The emergency platform 2 is slidably connected to the trailer 5 through a translation cylinder 11 arranged along the excavation direction of the trailer; as a preferred embodiment, the translation cylinder 11 is a two-stage cylinder. Under the premise of ensuring the formation of the cylinder, the cylinder volume is smaller, saving installation space. There are two translation cylinders, which are arranged along the excavation direction of the trailer. The piston rod end of the translation cylinder is connected to the upper frame of the emergency platform. When the piston rod of the translation cylinder is extended, the emergency platform moves toward the right side of the trailer with the emergency vehicle; when the piston rod of the translation cylinder is retracted, the emergency platform moves toward the left side of the trailer with the emergency vehicle. When the piston rod of the translation cylinder is fully retracted, the emergency platform and the emergency vehicle 1 are just located on the axis of the trailer section. The trailer 5 is equipped with a pulley block 3. The emergency platform 2 is connected to a lifting cylinder 10 mounted on the trailer 5 via a steel wire rope 4 that engages the pulley block 3. Specifically, the emergency platform 2 is symmetrically provided with four hooks, one end of which is connected to a hook, and the other end to the piston rod of the lifting cylinder 10. While this embodiment uses a cylinder as the actuator, other similar solutions can also be employed, such as using a hydraulic actuator such as a motor or a swing cylinder. The lifting cylinder is used to raise and lower the emergency trolley, while the translation cylinder controls the trolley's horizontal movement.

[0027] When an emergency occurs, the complete emergency action process is: the lifting cylinder piston rod is retracted, causing the emergency platform to rise and separate from the platform on the right side of the trailer, and then the translation cylinder piston rod is retracted until the piston rod is completely retracted. At this time, the emergency platform and the emergency trolley are at the center axis position of trailer 5, and then the lifting cylinder piston rod is extended until the emergency platform falls to the tunnel ground. This is a complete emergency action process.

[0028] like Figure 3 As shown in Example 2, a hydraulic control system for a shield machine emergency platform as described in Example 1, wherein the emergency oil source is connected to the lifting cylinder 10 through a first manual reversing valve 6.1 and a pipeline to control the ascent of the emergency platform 2; the emergency oil source is connected to the lifting cylinder 10 through a second manual reversing valve 6.2 and a pipeline to control the descent of the emergency platform 2; the emergency oil source is connected to the translation cylinder 11 through a third manual reversing valve 6.3 and a pipeline to control the translation of the emergency platform 2; the conventional oil source is connected to the lifting cylinder 10 through a first valve group, and the conventional oil source is connected to the translation cylinder 11 through a second valve group. The first and second valve groups ensure the normal operation of the lifting and translation cylinders under normal operating conditions. The first manual reversing valve 6.1, the second manual reversing valve 6.2, and the third manual reversing valve 6.3 constitute the emergency manual valve; the emergency manual valve adopts a two-position four-way manual reversing valve, and innovatively adopts an "O" type functional valve in the normal position, making manual control simpler and more effective.

[0029] The emergency oil source in this embodiment is provided by the accumulator 1, which not only can provide the oil source power for the emergency system, but also can absorb the pressure impact generated by the movement of the emergency trolley and other nearby actuators in the normal mode. The accumulator 1 is connected with the first hand-operated directional valve 6.1, the second hand-operated directional valve 6.2 and the third hand-operated directional valve 6.3 through the emergency pipeline, and the accumulator safety valve 2 is arranged on the emergency pipeline. The accumulator safety valve ensures the safety of the accumulator pressure; the accumulator provides power source for emergency action; in this embodiment, the accumulator is used as the power source, and other power sources such as hand-operated pump can also be used. The normal oil source is connected with the accumulator 1 through the supplementary oil circuit, that is, the normal oil source charges the accumulator in the normal mode, stores the hydraulic oil power used in the emergency state, and limits the safety pressure of the accumulator by the safety valve; when the power is lost in special circumstances, the emergency control circuit is used to manually move the handle of the emergency directional valve to make the lifting oil cylinder and the translation oil cylinder move.

[0030] In embodiment 3, a hydraulic control system of the emergency platform of the shield tunneling machine is provided, and on the basis of embodiment 2, a first balance valve 5.1 is arranged on the pipeline between the first hand-operated directional valve 6.1 and the lifting oil cylinder 10; the first balance valve 5.1 and the first hand-operated directional valve 6.1 can be integrated on a valve block, and the valve block is connected with a first one-way valve 3.1 at the oil return port, and the oil return is performed through the first one-way valve to the oil return tank. The oil outlet of the first balance valve 5.1 is connected with the rod cavity of the lifting oil cylinder 10 through the first oil inlet pipe; the oil return port of the first balance valve 5.1 is connected with the rodless cavity of the lifting oil cylinder 10 through the first oil return pipe; and the pipeline through which the emergency oil source enters the first hand-operated directional valve 6.1 is provided with a first ball valve 4.1. In an emergency, the handle of the hand-operated directional valve 6.1 is moved, the pressure oil in the accumulator 1 enters the first hand-operated directional valve 6.1 through the first ball valve 4.1, and then enters the rod cavity of the lifting oil cylinder 10 through the first balance valve 5.1, at this time, the piston rod of the lifting oil cylinder 10 is recovered, the emergency platform is lifted, and the right side platform of the trailer is separated, and the first step of lifting action is completed.

[0031] The third balance valve 5.4 is arranged on the pipeline between the third manual reversing valve 6.3 and the translation oil cylinder 11 in the embodiment, and the third balance valve 5.4 and the third manual reversing valve 6.3 can be integrated on a valve block, the oil return port of the valve block is connected with the sixth one-way valve 3.6, and the oil return is performed through the sixth one-way valve to flow to the oil return tank. The oil outlet of the third balance valve 5.4 is connected with the rod cavity of the translation oil cylinder 11 through the third oil inlet pipe; the oil return port of the third balance valve 5.4 is connected with the rodless cavity of the translation oil cylinder 11 through the third oil return pipe; and the fourth ball valve 4.4 is arranged on the pipeline through which the emergency oil source enters the third manual reversing valve 6.3. By moving the third manual reversing valve 6.3, the pressure oil in the accumulator 1 enters the third manual reversing valve 6.3 through the fourth ball valve 4.4, then enters the rod cavity of the translation oil cylinder 11 through the third balance valve 5.4, and the rodless cavity returns oil, at this time, the piston rod of the translation oil cylinder 11 is retracted, the emergency platform and the emergency trolley move to the left side of the trailer, and stop until the center position of the trailer is reached; and the second step of the translation action is completed.

[0032] The second balance valve 5.2 is arranged on the pipeline between the second manual reversing valve 6.2 and the lifting oil cylinder 10 in the embodiment, and the second balance valve 5.2 and the second manual reversing valve 6.2 can also be integrated on a valve block, the oil return port of the valve block is connected with the third one-way valve 3.3, and the oil return is performed through the third one-way valve to flow to the oil return tank. The oil outlet of the second balance valve 5.2 is connected with the rodless cavity of the lifting oil cylinder 10 through the second oil inlet pipe; the oil return port of the second balance valve 5.2 is connected with the rod cavity of the lifting oil cylinder 10 through the second oil return pipe; and the second ball valve 4.2 is arranged on the pipeline through which the emergency oil source enters the second manual reversing valve 6.2. By moving the second manual reversing valve 6.2, the pressure oil in the accumulator 1 enters the second manual reversing valve through the second ball valve, then enters the lifting oil cylinder 10 through the second balance valve, at this time, the rodless cavity of the lifting oil cylinder 10 is supplied with oil, the rod cavity returns oil, the piston rod of the lifting oil cylinder 10 is extended, the emergency platform and the emergency trolley are lowered, and stop until the tunnel ground is reached, at this time, the entire emergency action is completed. The second oil inlet pipe is connected with the oil return tank through the oil supplement branch in the embodiment, and the second one-way valve 3.2 is arranged on the oil supplement branch. That is, the pipeline on the large cavity side of the lifting oil cylinder is provided with the one-way valve, when the large cavity of the oil cylinder is supplied with oil, the one-way valve can prevent the large cavity of the oil cylinder from being empty and vibrating, can supplement oil from the oil return pipeline, and can ensure that the emergency platform is lowered more stably.

[0033] The first valve group in the embodiment comprises a first pressure reducing valve 8.1, a first electromagnetic reversing valve 9.1, a first throttle valve 7.1 and a fourth balance valve 5.3 arranged in series along the oil inlet direction; the oil return of the valve group flows back to the oil return tank through a fourth one-way valve 3.4; a third ball valve 4.3 is arranged on the pipeline through which the normal oil source enters the first pressure reducing valve 8.1, and a fifth one-way valve 3.5 is arranged on the pipeline through which the normal oil source enters the supplementary oil circuit of the accumulator 1. The normal oil source enters the pressure reducing valve through the third ball valve 4.3, and the pressure reducing valve adjusts the system pressure; when the first electromagnetic reversing valve 9.1 is electrified in the cross position, the piston rod of the lifting oil cylinder 10 is retracted, and the emergency platform is lifted; when the first electromagnetic reversing valve 9.1 is electrified in the parallel position, the piston rod of the lifting oil cylinder 10 is extended, and the emergency platform is lowered. The oil from the first electromagnetic reversing valve enters the lifting oil cylinder through the throttle valve, and the throttle valve adjusts the extension and retraction speed of the oil cylinder.

[0034] The second valve group in the embodiment comprises a second pressure reducing valve 8.2, a second electromagnetic reversing valve 9.2, a second throttle valve 7.2 and a fifth balance valve 5.5 arranged in series along the oil inlet direction; the oil return of the valve group flows back to the oil return tank through an eighth one-way valve 3.8; a fifth ball valve 4.5 is arranged on the pipeline through which the normal oil source enters the second pressure reducing valve 8.2, and a seventh one-way valve 3.7 is arranged on the pipeline through which the normal oil source enters the supplementary oil circuit of the accumulator 1. When the second electromagnetic reversing valve 9.2 is electrified in the cross position, the piston rod of the translation oil cylinder 11 is extended, and the emergency platform moves to the right; when the second electromagnetic reversing valve 9.2 is electrified in the parallel position, the piston rod of the translation oil cylinder 11 is retracted, and the emergency platform moves to the left.

[0035] The hydraulic control system of the emergency platform of the shield machine is divided into normal mode control and emergency mode control:

[0036] (1) Normal mode: the ball valves are all in the normally open state, and in the normal state, the hydraulic control system is supplied with oil by the normal system. The lifting oil cylinder 10 is controlled by the fourth balance valve 5.3, the first throttle valve 7.1, the first pressure reducing valve 8.1 and the first electromagnetic reversing valve 9.1; the translation oil cylinder 11 is controlled by the fifth balance valve 5.5, the second throttle valve 7.2, the second pressure reducing valve 8.1 and the second electromagnetic reversing valve 9.2; when the first electromagnetic reversing valve 9.1 is electrified in the cross position, the piston rod of the lifting oil cylinder 10 is retracted, and the emergency platform is lifted; when the first electromagnetic reversing valve 9.1 is electrified in the parallel position, the piston rod of the lifting oil cylinder 10 is extended, and the emergency platform is lowered; when the second electromagnetic reversing valve 9.2 is electrified in the cross position, the piston rod of the translation oil cylinder 11 is extended, and the emergency platform moves to the right; when the second electromagnetic reversing valve 9.2 is electrified in the parallel position, the piston rod of the translation oil cylinder 11 is retracted, and the emergency platform moves to the left.

[0037] (2) Emergency mode: when the device suddenly encounters an emergency power failure, by pressing the sequence control 6.1, 6.3, 6.2 three manual reversing valve, release the accumulator pressure oil, to control the cylinder action, realize the emergency platform corresponding action to complete the emergency operation, as follows: move the first manual reversing valve 6.1 handle, the pressure oil in the accumulator 1 into the emergency pipeline, the lift cylinder 10 small cavity oil, the big back oil, at this time the lift cylinder 10 piston rod retraction, emergency platform and emergency car lift; Then move the third manual reversing valve 6.3, the pressure oil in the accumulator 1 into the emergency pipeline, the translation of oil cylinder 11 small cavity oil, the big back oil, at this time the translation of oil cylinder 11 piston rod retraction, emergency platform and emergency car to the trailer left side, until the mobile to the trailer center position; Finally move the second manual reversing valve 6.2, the pressure oil in the accumulator 1 into the emergency pipeline, at this time, the lift cylinder 10 big cavity oil, small back oil, the lift cylinder 10 piston rod extension, emergency platform and emergency car down, until the fall to the tunnel ground, at this time, complete the whole emergency action. The use of three manual valve in sequence operation, emergency action to ensure the accuracy, is to prevent misoperation design, at the same time improve the safety.

[0038] The above only for the preferred embodiment of the present application, and not to limit the present application, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. An emergency platform for a tunneling machine, characterized by: The emergency vehicle platform (200) is slidably connected with the trailer (5) through a translation oil cylinder (11) arranged along the tunneling direction of the trailer, and the emergency vehicle platform (200) is connected with a lifting oil cylinder (10) arranged on the trailer (5).

2. The emergency platform for a tunneling machine of claim 1, wherein: The trailer (5) is provided with a pulley block (3), and the emergency vehicle platform (200) is connected with the lifting oil cylinder (10) arranged on the trailer (5) through a steel wire rope (4) matched with the pulley block (3); when the lifting oil cylinder (10) is extended, the emergency vehicle platform (200) with the emergency trolley (100) is lowered; when the lifting oil cylinder (10) is retracted, the emergency vehicle platform (200) with the emergency trolley (100) is raised; when the translation oil cylinder (11) is extended, the emergency vehicle platform (200) with the emergency trolley (100) moves to the middle of the trailer (5) together. Four hooks are symmetrically arranged on the emergency vehicle platform (200), one end of the steel wire rope is connected with the hook, and the other end is connected with the piston rod of the lifting oil cylinder (10); the translation oil cylinder (11) is a double-stage cylinder.

3. A hydraulic control system for an emergency platform of a tunneling machine, characterized by: The emergency platform of the shield tunneling machine in claim 1 or 2, an emergency oil source is connected with the lifting oil cylinder (10) through a first hand-operated reversing valve (6.1) and a pipeline, controls the lifting action of the emergency vehicle platform (200); the emergency oil source is connected with the lifting oil cylinder (10) through a second hand-operated reversing valve (6.2) and a pipeline, controls the lowering action of the emergency vehicle platform (200); the emergency oil source is connected with the translation oil cylinder (11) through a third hand-operated reversing valve (6.3) and a pipeline, controls the translation action of the emergency vehicle platform (200); a conventional oil source is connected with the lifting oil cylinder (10) through a first valve group, and the conventional oil source is connected with the translation oil cylinder (11) through a second valve group.

4. The hydraulic control system of the emergency platform of the tunneling machine according to claim 3, characterized in that: The emergency oil source is provided by an accumulator (1), the accumulator (1) is connected with the first hand-operated reversing valve (6.1), the second hand-operated reversing valve (6.2) and the third hand-operated reversing valve (6.3) through an emergency pipeline respectively, and an accumulator safety valve (2) is arranged on the emergency pipeline; the conventional oil source is communicated with the accumulator (1) through a supplementary oil path.

5. The hydraulic control system of the emergency platform of the tunneling machine according to claim 4, characterized in that: A first balance valve (5.1) is arranged on the pipeline between the first hand-operated reversing valve (6.1) and the lifting oil cylinder (10), an oil outlet of the first balance valve (5.1) is communicated with a rod cavity of the lifting oil cylinder (10) through a first oil inlet pipe, and an oil return port of the first balance valve (5.1) is communicated with a rodless cavity of the lifting oil cylinder (10) through a first oil return pipe; a first ball valve (4.1) is arranged on the pipeline through which the emergency oil source enters the first hand-operated reversing valve (6.1).

6. The hydraulic control system of the emergency platform of the tunneling machine according to claim 4 or 5, characterized in that: A second balance valve (5.2) is arranged on the pipeline between the second hand-operated reversing valve (6.2) and the lifting oil cylinder (10), an oil outlet of the second balance valve (5.2) is communicated with the rodless cavity of the lifting oil cylinder (10) through a second oil inlet pipe, and an oil return port of the second balance valve (5.2) is communicated with the rod cavity of the lifting oil cylinder (10) through a second oil return pipe; a second ball valve (4.2) is arranged on the pipeline through which the emergency oil source enters the second hand-operated reversing valve (6.2).

7. The hydraulic control system of the emergency platform of the tunneling machine according to claim 6, characterized in that: The second oil inlet pipe is connected with the oil return tank through an oil supplement branch, and a second one-way valve (3.2) is arranged on the oil supplement branch.

8. The hydraulic control system of the emergency platform of the tunneling machine according to claim 4 or 7, characterized in that: A third balance valve (5.4) is arranged on a pipeline between the third manual reversing valve (6.3) and the translation oil cylinder (11), an oil outlet of the third balance valve (5.4) is connected with a rod cavity of the translation oil cylinder (11) through a third oil inlet pipe, an oil return port of the third balance valve (5.4) is connected with a rodless cavity of the translation oil cylinder (11) through a third oil return pipe, and a fourth ball valve (4.4) is arranged on a pipeline through which an emergency oil source enters the third manual reversing valve (6.3).

9. The hydraulic control system of the emergency platform of the tunneling machine according to claim 4, characterized in that: The first valve group comprises a first pressure reducing valve (8.1), a first electromagnetic reversing valve (9.1), a first throttle valve (7.1) and a fourth balance valve (5.3) arranged in series along an oil inlet direction, a third ball valve (4.3) is arranged on a pipeline through which a conventional oil source enters the first pressure reducing valve (8.1), and a fifth one-way valve (3.5) is arranged on a pipeline through which the conventional oil source enters a supplement oil path of the accumulator (1).

10. The hydraulic control system of the emergency platform of the tunneling machine according to claim 4 or 9, characterized in that: The second valve group comprises a second pressure reducing valve (8.2), a second electromagnetic reversing valve (9.2), a second throttle valve (7.2) and a fifth balance valve (5.5) arranged in series along an oil inlet direction, a fifth ball valve (4.5) is arranged on a pipeline through which the conventional oil source enters the second pressure reducing valve (8.2), and a seventh one-way valve (3.7) is arranged on a pipeline through which the conventional oil source enters the supplement oil path of the accumulator (1).

Images