Vibroseis automatic folding and unfolding vehicle ladder system and vibroseis vehicle

Abstract

The utility model discloses a controllable seismic source automatic retractable folding vehicle ladder system and a controllable seismic source vehicle, and relates to the technical field of petroleum seismic exploration, the vehicle ladder system comprises a vehicle ladder, one end of the vehicle ladder is hinged to a seismic source platform, and the other end of the vehicle ladder is a free end; the box step is located at a first position in a folded state, and the free end of the box step is close to the bottom of the seismic source platform; the box step is located at the second position in the unfolded state, and the free end of the box step is far away from the bottom of the seismic source platform; the driving device is mounted on the seismic source platform, is connected with the vehicle ladder and is used for driving the vehicle ladder to rotate around the hinged position; the control device is connected with the driving device and used for controlling the driving device to drive the box step to rotate to the second position according to the parking signal or controlling the driving device to drive the box step to rotate to the first position according to the traveling signal; the vehicle ladder can be automatically unfolded during parking, a worker can conveniently get on and off a vehicle, the vehicle ladder can be automatically folded during driving, and the vehicle ladder is prevented from being damaged in the advancing process.

Description

Technical Field

[0001] The present application relates to the technical field of petroleum seismic exploration, and in particular, to a controllable source automatic retractable folding ladder system and a controllable source vehicle. Background Art

[0002] A controllable source is the only special excitation equipment for oil and gas exploration in the geophysical exploration industry that can control the excitation energy and meet the requirements of HSE (Health, Safety, and Environment) management, and has become the main force in domestic and international petroleum seismic exploration.

[0003] The controllable source vehicle ladder is usually installed on both sides of the source vehicle and fixed to the controllable source platform by welding or screws. Its main function is to facilitate the maintenance personnel of the controllable source to get on and off the controllable source vehicle and reduce the risk of personnel injury.

[0004] The construction terrain of the controllable source includes gobi, desert, farmland, hills, towns, and cities, etc. The terrain is complex, with criss-crossing ravines, unevenness, and diverse changes. When the controllable source vehicle is traveling, due to the undulation of the terrain and the immobility of the ladder, the ground clearance of the original ladder will become smaller or larger. When the ground clearance of the ladder is less than zero, the ladder will inevitably be damaged due to the drag during the driving of the source vehicle, and the damage probability is relatively high. The height of the controllable source platform is close to two meters. When there is no ladder, there is a great safety risk for maintenance personnel to get on and off the controllable source vehicle. After the ladder is damaged, it needs to be welded again by driving the controllable source vehicle back to the seismic team camp, which increases the downtime and seriously affects the construction efficiency. Therefore, the old-fashioned ladder is no longer suitable for the current high-efficiency acquisition mode of the controllable source. Utility Model Content

[0005] The present application aims to provide a controllable source automatic retractable folding ladder system and a controllable source vehicle, aiming to solve the problems that the existing controllable source vehicle ladder is easily damaged and affects the construction efficiency.

[0006] The present application provides a controllable source automatic retractable folding ladder system, including:

[0007] A ladder, arranged at the bottom of the source platform, one end of the ladder is hinged to the source platform, and the other end of the ladder is a free end;

[0008] The ladder includes a folded state and an unfolded state. In the folded state, the ladder is in the first position, and the free end of the ladder is close to the bottom of the source platform; in the unfolded state, the ladder is in the second position, and the free end of the ladder is far from the bottom of the source platform;

[0009] A driving device, installed on the source platform and connected to the ladder, for driving the ladder to rotate around the hinged position;

[0010] A control device, connected to the driving device, is configured to control the driving device to drive the vehicle ladder to rotate to a second position along a first direction according to a parking signal of the seismic source vehicle, or to control the driving device to drive the vehicle ladder to rotate to a first position along a second direction according to a driving signal of the seismic source vehicle.

[0011] Optionally, the driving device includes a hydraulic cylinder, which is hinged to the seismic source platform, and the end of the piston rod of the hydraulic cylinder is connected to the vehicle ladder;

[0012] The control device is connected to the hydraulic cylinder and is configured to control the piston rod of the hydraulic cylinder to extend according to a parking signal, so that the vehicle ladder rotates to the second position along the first direction, or to control the piston rod of the hydraulic cylinder to contract according to a driving signal, so that the vehicle ladder rotates to the first position along the second direction.

[0013] Further, the control device includes a directional control valve, a first fluid system, a liquid storage tank and a commutation control module;

[0014] The first end of the directional control valve is connected to the first end of the hydraulic cylinder, and the second end of the directional control valve is connected to the second end of the hydraulic cylinder; the third end of the directional control valve is connected to the first fluid system, and the first fluid system is configured to supply a first working fluid into the hydraulic cylinder; the fourth end of the directional control valve is connected to the liquid storage tank, and the liquid storage tank is configured to receive the first working fluid flowing out of the hydraulic cylinder;

[0015] The directional control valve includes a first working state and a second working state;

[0016] In the first working state, the directional control valve is configured to control the first working fluid in the first fluid system to flow into the first end of the hydraulic cylinder, and the first working fluid at the second end of the hydraulic cylinder to flow back to the liquid storage tank, so that the piston rod of the hydraulic cylinder contracts;

[0017] In the second working state, the directional control valve is configured to control the first working fluid in the first fluid system to flow into the second end of the hydraulic cylinder, and the first working fluid at the first end of the hydraulic cylinder to flow back to the liquid storage tank, so that the piston rod of the hydraulic cylinder extends;

[0018] The commutation control module is connected to the directional control valve and is configured to control the directional control valve to be in the second working state according to a parking signal, or to control the directional control valve to be in the first working state according to a driving signal.

[0019] Optionally, the directional control valve includes a two-position four-way hydraulic directional control valve.

[0020] Optionally, the commutation control module includes:

[0021] The parking brake circuit is connected to the reversing valve;

[0022] A second fluid system is connected to the parking brake circuit and is used to supply a second working fluid to the parking brake circuit; the second working fluid is used to drive the spool of the reversing valve to move so that the reversing valve switches from the first working state to the second working state;

[0023] The vehicle running system control valve group is respectively connected to the second fluid system and the parking brake circuit and is used to control the communication between the second fluid system and the parking brake circuit according to a stop signal, or control the disconnection between the second fluid system and the parking brake circuit according to a driving signal.

[0024] Optionally, a throttle valve is further arranged between the reversing valve and the hydraulic cylinder. One end of the throttle valve is communicated with the reversing valve, and the other end is communicated with the hydraulic cylinder. The throttle valve is used to adjust the flow rate of the first working fluid flowing into or out of the hydraulic cylinder.

[0025] Optionally, the number of the vehicle ladders is set to be multiple, and the number of the hydraulic cylinders is set to be multiple. The multiple vehicle ladders correspond to the multiple hydraulic cylinders one by one;

[0026] The control device is simultaneously connected to the multiple hydraulic cylinders and is used to simultaneously control the piston rods of the multiple hydraulic cylinders to extend according to a stop signal so that the multiple vehicle ladders simultaneously rotate to the second position along the first direction, or simultaneously control the piston rods of the multiple hydraulic cylinders to contract according to a driving signal so that the multiple vehicle ladders simultaneously rotate to the first position along the second direction.

[0027] This application also provides a vibratory source vehicle, including the controllable vibratory source automatic retractable and foldable vehicle ladder system as described above.

[0028] Beneficial effects:

[0029] The present application provides a controllable vibration source automatic retractable and foldable ladder system, including: a ladder, arranged at the bottom of the vibration source platform, one end of the ladder is hinged to the vibration source platform, and the other end of the ladder is a free end; the ladder includes a folded state and an unfolded state. In the folded state, the ladder is in a first position, and the free end of the ladder is close to the bottom of the vibration source platform; in the unfolded state, the ladder is in a second position, and the free end of the ladder is far from the bottom of the vibration source platform; a driving device, installed on the vibration source platform and connected to the ladder, for driving the ladder to rotate around the hinged position; a control device, connected to the driving device, for controlling the driving device to drive the ladder to rotate along a first direction to the second position according to the parking signal of the vibration source vehicle, or for controlling the driving device to drive the ladder to rotate along a second direction to the first position according to the driving signal of the vibration source vehicle. By providing the ladder, the driving device and the control device, the present application can realize the automatic unfolding of the ladder when the controllable vibration source vehicle stops, facilitating maintenance personnel to get on and off the vehicle, and realize the automatic folding of the ladder when the controllable vibration source vehicle is driving, thereby avoiding damage to the ladder during the vehicle's travel, improving the construction efficiency and utilization rate of the controllable vibration source, and being of great significance for accelerating the large-scale controllable vibration source green exploration, reducing the exploration cost, and adapting to the current controllable vibration source in seismic exploration efficient acquisition technology.

[0030] The present application also provides a controllable vibration source vehicle, including the above-mentioned controllable vibration source automatic retractable and foldable ladder system. The controllable vibration source vehicle has the same advantages as the above-mentioned ladder system compared with the prior art, which will not be elaborated here. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the description of the embodiments of the present application. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a schematic structural diagram of the ladder in the folded state in the controllable vibration source automatic retractable and foldable ladder system proposed in an embodiment of the present application;

[0033] Figure 2 It is a schematic structural diagram of the ladder in the unfolded state in the controllable vibration source automatic retractable and foldable ladder system proposed in an embodiment of the present application;

[0034] Figure 3 It is a schematic control principle diagram of the controllable vibration source automatic retractable and foldable ladder system proposed in an embodiment of the present application.

[0035] Description of the Reference Numerals:

[0036] 1. Seismic source platform; 2. Vehicle ladder; 21. Left front vehicle ladder; 22. Right front vehicle ladder; 23. Left rear vehicle ladder; 24. Right rear vehicle ladder; 3. Hydraulic cylinder; 31. Left front vehicle ladder hydraulic cylinder; 32. Right front vehicle ladder hydraulic cylinder; 33. Left rear vehicle ladder hydraulic cylinder; 34. Right rear vehicle ladder hydraulic cylinder; 41. Left front vehicle ladder throttle valve; 42. Right front vehicle ladder throttle valve; 43. Left rear vehicle ladder throttle valve; 44. Right rear vehicle ladder throttle valve; 5. Two-position four-way hydraulic directional control valve; 6. Low-pressure system; 7. Liquid storage tank; 8. High-pressure system; 9. Control valve group for driving system. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0038] In the related art, the vehicle ladders of the vibrator are installed on both sides of the vibrator, and most of them are fixed to the seismic source platform by welding or screws. There are a total of four vehicle ladders. The two vehicle ladders at the front end are located on both sides of the cab, and the two vehicle ladders at the rear end are located on both sides of the tail of the seismic source. The main function is to provide access for the maintenance personnel of the seismic source to get on and off the vibrator vehicle and reduce the risk of injury to the maintenance personnel.

[0039] The terrain for vibrator construction includes gobi, desert, farmland, hilly areas, towns and cities, etc. The terrain is complex, with criss-crossing ravines, unevenness, and diverse changes. When the vibrator is moving, due to the undulation of the terrain and the vehicle ladders remaining stationary, the ground clearance of the original vehicle ladders will become smaller or larger. When the ground clearance of the vehicle ladder is less than zero, the vehicle ladder will inevitably be damaged due to the dragging during the driving of the vibrator, and the damage probability is relatively high. The height of the seismic source platform is nearly 2 meters. When there is no vehicle ladder, there is a great safety risk for maintenance personnel to get on and off the vibrator. After the vehicle ladder is damaged, it needs to be welded again, and the vibrator vehicle has to be driven back to the seismic team camp, resulting in at least one day of downtime. In a seismic team with 20 vibrators, at least 4 vehicle ladders are damaged during construction every day. The increased operation time of the seismic team will result in an increase in exploration costs of at least 60,000 yuan.

[0040] In view of this, an automatic retractable and folding vehicle ladder system for a vibrator is proposed in the embodiments of the present application.

[0041] See Figure 1 and Figure 2 , an automatic retractable and folding vehicle ladder system for a vibrator, comprising:

[0042] The ladder 2 is arranged at the bottom of the vibration source platform 1. One end of the ladder 2 is hinged to the vibration source platform 1, and the other end of the ladder 2 is a free end;

[0043] The ladder 2 includes a folded state and an unfolded state. In the folded state, the ladder 2 is in the first position, and the free end of the ladder 2 is close to the bottom of the vibration source platform 1; in the unfolded state, the ladder 2 is in the second position, and the free end of the ladder 2 is away from the bottom of the vibration source platform 1;

[0044] The driving device is installed on the vibration source platform 1 and connected to the ladder 2 for driving the ladder 2 to rotate around the hinge position;

[0045] The control device is connected to the driving device for controlling the driving device to drive the ladder 2 to rotate to the second position along the first direction according to the parking signal of the vibration source vehicle, or for controlling the driving device to drive the ladder 2 to rotate to the first position along the second direction according to the driving signal of the vibration source vehicle.

[0046] With the above arrangement, when the vibroseis vehicle stops, the control device can control the driving device to drive the ladder 2 along the first direction, that is, away from the vibration source platform 1, so that the ladder 2 reaches the second position, realizing the automatic unfolding of the ladder 2, which is convenient for maintenance personnel to get on and off the vehicle; when the vibroseis vehicle is driving, the control device can control the driving device to drive the ladder 2 along the second direction, that is, towards the vibration source platform 1, so that the ladder 2 reaches the first position, realizing the automatic folding of the ladder 2, thus avoiding damage to the ladder 2 during the vehicle's travel, and effectively improving the construction efficiency and utilization rate of the vibroseis.

[0047] Optionally, the driving device includes a hydraulic cylinder 3. The hydraulic cylinder 3 is hinged to the vibration source platform 1, and the end of the piston rod of the hydraulic cylinder 3 is connected to the ladder 2.

[0048] The control device is connected to the hydraulic cylinder 3 for controlling the piston rod of the hydraulic cylinder 3 to extend according to the parking signal, so that the ladder 2 rotates to the second position along the first direction, or for controlling the piston rod of the hydraulic cylinder 3 to contract according to the driving signal, so that the ladder 2 rotates to the first position along the second direction.

[0049] Specifically, as Figure 1 and Figure 2As shown in the figure, in this embodiment, the driving device adopts a hydraulic cylinder 3. The hydraulic cylinder 3 includes a cylinder barrel. The bottom end of the cylinder barrel is hinged to the vibration source platform 1. A piston and a piston rod are arranged inside the cylinder barrel. The piston is slidably connected to the inner wall of the cylinder barrel. One end of the piston rod is fixedly connected to the piston, and the other end is connected to the vehicle ladder 2. When the piston axially slides along the inner wall of the cylinder barrel, it will drive the piston rod to extend out of the cylinder barrel or contract back into the cylinder barrel, thereby driving the vehicle ladder 2 to rotate.

[0050] See Figure 2 , when the vibration source vehicle stops, the control device controls the piston rod of the hydraulic cylinder 3 to extend, pushing the vehicle ladder 2 to rotate clockwise around the hinge position, so that the free end of the vehicle ladder 2 gradually moves away from the bottom of the vibration source platform 1 until the vehicle ladder 2 reaches the second position and is parked on the side of the vibration source platform 1 in a substantially longitudinal arrangement. At this time, the vehicle ladder 2 is in the unfolded state, and the staff can get on and off the vibration source vehicle through the vehicle ladder 2.

[0051] See Figure 1 , when the vibration source vehicle is driving, the control device controls the piston rod of the hydraulic cylinder 3 to contract, pulling the vehicle ladder 2 to rotate counterclockwise around the hinge position, so that the free end of the vehicle ladder 2 gradually approaches the bottom of the vibration source platform 1 until the vehicle ladder 2 reaches the first position and is folded to the bottom of the vibration source platform 1 in a substantially horizontal arrangement. At this time, the vehicle ladder 2 is in the folded state, which can avoid being dragged and damaged during the vehicle's travel.

[0052] Furthermore, the control device includes a reversing valve, a first fluid system, a liquid storage tank 7 and a reversing control module;

[0053] The first end of the reversing valve is connected to the first end of the hydraulic cylinder 3, and the second end of the reversing valve is connected to the second end of the hydraulic cylinder 3; the third end of the reversing valve is connected to the first fluid system, and the first fluid system is used to provide the first working fluid into the hydraulic cylinder 3; the fourth end of the reversing valve is connected to the liquid storage tank 7, and the liquid storage tank 7 is used to receive the first working fluid flowing out of the hydraulic cylinder 3.

[0054] The reversing valve includes a first working state and a second working state; in the first working state, the reversing valve is used to control the first working fluid in the first fluid system to flow into the first end of the hydraulic cylinder 3, and the first working fluid at the second end of the hydraulic cylinder 3 flows back to the liquid storage tank 7, so that the piston rod of the hydraulic cylinder 3 contracts; in the second working state, the reversing valve is used to control the first working fluid in the first fluid system to flow into the second end of the hydraulic cylinder 3, and the first working fluid at the first end of the hydraulic cylinder 3 flows back to the liquid storage tank 7, so that the piston rod of the hydraulic cylinder 3 extends.

[0055] The commutation control module is connected to the commutation valve and is used to control the commutation valve to be in the second working state according to a parking signal, or to control the commutation valve to be in the first working state according to a driving signal.

[0056] Specifically, in this embodiment, the driving device is a hydraulic cylinder 3, and the first fluid system is a low-pressure system 6, which is used to provide the first working fluid for the hydraulic cylinder 3, that is, a low-pressure oil flow. The low-pressure oil flow serves as the working medium for driving the piston of the hydraulic cylinder 3 to move. Oil ports are respectively arranged at both ends of the hydraulic cylinder 3. By changing the direction of the low-pressure oil flow flowing into and out of the hydraulic cylinder 3, the moving direction of the piston of the hydraulic cylinder 3 can be controlled, thereby controlling the extending or contracting state of the piston rod.

[0057] The commutation valve can control the on-off state of the oil circuit by changing the position of the valve core, thereby realizing the switching of the forward and reverse flows of the low-pressure oil flow. Specifically, in this embodiment, the commutation valve used is a two-position four-way commutation valve. The first end of the commutation valve is connected to the first end of the hydraulic cylinder 3, and the second end of the commutation valve is connected to the second end of the hydraulic cylinder 3; the third end of the commutation valve is connected to the first fluid system, and the fourth end of the commutation valve is connected to the liquid storage tank 7.

[0058] The two-position four-way commutation valve has two working states: in the first working state, the valve core is in the first working position, and the commutation valve can control the low-pressure oil flow in the low-pressure system 6 to enter the first end of the hydraulic cylinder 3 through the commutation valve, and at the same time, the low-pressure oil flow at the second end of the hydraulic cylinder 3 flows back to the liquid storage tank 7 through the commutation valve, so that the piston rod of the hydraulic cylinder 3 contracts;

[0059] In the second working state, the valve core is in the second working position, and the commutation valve can control the low-pressure oil flow in the low-pressure system 6 to enter the second end of the hydraulic cylinder 3 through the commutation valve, and at the same time, the low-pressure oil flow at the first end of the hydraulic cylinder 3 flows back to the liquid storage tank 7 through the commutation valve, so that the piston rod of the hydraulic cylinder 3 extends.

[0060] The commutation control module can control the working state of the commutation valve through the parking or driving signal of the vibration source vehicle. Specifically, when the vibration source vehicle stops, it controls the commutation valve to be in the second working state, so that the piston rod of the hydraulic cylinder 3 extends to push the vehicle ladder 2 to rotate and unfold; when the vibration source vehicle is driving, it controls the commutation valve to be in the first working state, so that the piston rod of the hydraulic cylinder 3 contracts to pull the vehicle ladder 2 to rotate and retract in the reverse direction.

[0061] Optionally, the commutation control module includes:

[0062] A parking brake circuit, connected to the commutation valve;

[0063] A second fluid system, connected to the parking brake circuit, is configured to supply a second working fluid to the parking brake circuit; the second working fluid is used to drive the spool of the reversing valve to move, so that the reversing valve switches from the first working state to the second working state;

[0064] The vehicle running system control valve group 9 is respectively connected to the second fluid system and the parking brake circuit, and is configured to control the communication between the second fluid system and the parking brake circuit according to a stop signal, or to control the disconnection between the second fluid system and the parking brake circuit according to a running signal.

[0065] Specifically, in this embodiment, the reversing valve is a two-position four-way hydraulic reversing valve 5, and the second fluid system is a high-pressure system 8, which is configured to supply a high-pressure oil flow to the parking brake circuit. By connecting the parking brake circuit to the reversing valve, the high-pressure oil flow can be introduced into the reversing valve, and the high-pressure oil flow is used as the working medium to drive the spool of the reversing valve to move. When the high-pressure oil flow enters the reversing valve, the high-pressure oil flow will push the spool of the reversing valve from the first working position to the second working position, so that the reversing valve is in the second working state; when the high-pressure oil flow is cut off, the spool loses the acting force of the high-pressure oil flow and will move reversely to reset and return to the first working position, so that the reversing valve is in the first working state.

[0066] The vehicle running system control valve group 9 is configured to control the on-off state between the second fluid system and the parking brake circuit. When the vibration source vehicle stops, the vehicle running system control valve group 9 obtains a stop signal, connects the second fluid system and the parking brake circuit, the high-pressure oil flow enters the parking brake circuit, and then enters the reversing valve, so that the reversing valve is in the second working state, and the piston rod of the hydraulic cylinder 3 extends to push the vehicle ladder 2 to rotate and unfold; when the vibration source vehicle is running, the vehicle running system control valve group 9 obtains a running signal, cuts off the communication between the second fluid system and the parking brake circuit, there is no high-pressure oil flow in the parking brake circuit, the reversing valve loses the acting force of the high-pressure oil flow, returns to the first working state, the piston rod of the hydraulic cylinder 3 contracts, and the vehicle ladder 2 is pushed to rotate and retract.

[0067] Optionally, a throttle valve is further arranged between the reversing valve and the hydraulic cylinder 3. One end of the throttle valve is communicated with the reversing valve, and the other end is communicated with the hydraulic cylinder 3. The throttle valve is configured to regulate the flow rate of the first working fluid flowing into or out of the hydraulic cylinder 3.

[0068] Preferably, in this embodiment, throttle valves are arranged between the first end of the hydraulic cylinder 3 and the reversing valve and between the second end of the hydraulic cylinder 3 and the reversing valve, which can play a role in regulating the flow rate of the low-pressure oil flow flowing into or out of the hydraulic cylinder 3, so as to be able to regulate the moving speed of the piston of the hydraulic cylinder 3 and realize the control of the extending or contracting speed of the piston rod.

[0069] Optionally, the number of the vehicle ladders 2 is set to be multiple, and the number of the hydraulic cylinders 3 is set to be multiple. The multiple vehicle ladders 2 and the multiple hydraulic cylinders 3 correspond to each other one by one.

[0070] The control device is simultaneously connected to the multiple hydraulic cylinders 3 and is configured to simultaneously control the piston rods of the multiple hydraulic cylinders 3 to extend according to a parking signal, so that the multiple vehicle ladders 2 simultaneously rotate in a first direction to a second position, or simultaneously control the piston rods of the multiple hydraulic cylinders 3 to contract according to a driving signal, so that the multiple vehicle ladders 2 simultaneously rotate in a second direction to a first position.

[0071] Specifically, in this embodiment, the number of the vehicle ladders 2 is set to be four. Two of them are arranged on both sides of the front end of the vibroseis vehicle, namely the left front vehicle ladder 21 and the right front vehicle ladder 22, and the other two are arranged on both sides of the rear end of the vibroseis vehicle, namely the left rear vehicle ladder 23 and the right rear vehicle ladder 24; the hydraulic cylinders 3 are also set to be four, corresponding to the four vehicle ladders 2 one by one, namely the left front vehicle ladder hydraulic cylinder 31, the right front vehicle ladder hydraulic cylinder 32, the left rear vehicle ladder hydraulic cylinder 33 and the right rear vehicle ladder hydraulic cylinder 34.

[0072] The first ends of the four hydraulic cylinders 3 can be simultaneously connected to the first end of the reversing valve in the form of a main pipeline cooperating with branch pipelines. Similarly, the second ends of the four hydraulic cylinders 3 can also be simultaneously connected to the second end of the reversing valve in the form of a main pipeline cooperating with branch pipelines. In this way, by controlling the working state of the reversing valve, the simultaneous control of the working states of the four hydraulic cylinders 3 can be realized, and further the simultaneous control of the states of the four vehicle ladders 2 can be realized.

[0073] It can be understood that in other embodiments, for the case of setting multiple vehicle ladders 2 and multiple hydraulic cylinders 3, more than one reversing valve group can also be set for control. For example, two reversing valves are adopted, one simultaneously controls the two hydraulic cylinders 3 at the front end, and the other simultaneously controls the two hydraulic cylinders 3 at the rear end.

[0074] See Figure 3 , the working principle of the controllable vibroseis automatic retractable and foldable vehicle ladder system provided by the embodiment of the present application is as follows:

[0075] When the vibrator is parked and braked, the vehicle running system control valve group 9 receives a parking signal, connecting the high-pressure system 8 to the parking brake circuit. High-pressure oil flows into the parking brake circuit and then into the two-position four-way hydraulic directional control valve 5, pushing the spool to move, causing the two-position four-way hydraulic directional control valve 5 to enter the second working state. At this time, the low-pressure oil flow in the low-pressure system 6 enters the left front vehicle ladder throttle valve 41, the right front vehicle ladder throttle valve 42, the left rear vehicle ladder throttle valve 43, and the right rear vehicle ladder throttle valve 44 simultaneously through the two-position four-way hydraulic directional control valve 5. Taking the left front vehicle ladder 21 as an example, the throttled low-pressure oil flow enters the second end of the left front vehicle ladder hydraulic cylinder 31. The low-pressure oil flow at the first end of the left front vehicle ladder hydraulic cylinder 31 flows back to the liquid storage tank 7 through the left front vehicle ladder throttle valve 41 and the two-position four-way hydraulic directional control valve 5, causing the piston rod of the hydraulic cylinder 3 to gradually extend outwards, pushing the left front vehicle ladder 21 to slowly reach the unfolded state. The other three hydraulic cylinders 3 are the same as the left front vehicle ladder hydraulic cylinder 31, simultaneously pushing the corresponding vehicle ladder 2 to reach the unfolded state.

[0076] When the vibrator vehicle starts and moves forward, the vehicle running system control valve group 9 receives a driving signal, disconnecting the high-pressure system 8 from the parking brake circuit. The two-position four-way hydraulic directional control valve 5 loses the effect of the high-pressure oil flow, and the spool resets, causing the two-position four-way hydraulic directional control valve 5 to enter the first working state. At this time, the low-pressure oil flow in the low-pressure system 6 enters the left front vehicle ladder throttle valve 41, the right front vehicle ladder throttle valve 42, the left rear vehicle ladder throttle valve 43, and the right rear vehicle ladder throttle valve 44 simultaneously through the two-position four-way hydraulic directional control valve 5. Still taking the left front vehicle ladder 21 as an example, the throttled low-pressure oil flow enters the first end of the left front vehicle ladder hydraulic cylinder 31. The low-pressure oil flow at the second end of the left front vehicle ladder hydraulic cylinder 31 flows back to the liquid storage tank 7 through the left front vehicle ladder throttle valve 41 and the two-position four-way hydraulic directional control valve 5, causing the piston rod of the hydraulic cylinder 3 to gradually contract inwards, pulling the left front vehicle ladder 21 to slowly reach the folded state. The other three hydraulic cylinders 3 are the same as the left front vehicle ladder hydraulic cylinder 31, simultaneously pulling the corresponding

[0077] vehicle ladder 2 to reach the folded state.

[0078] For the vehicle ladder system provided by the embodiment of the present application, the success rate of automatic retraction, extension, and folding of the vehicle ladder is 100%. When the vibrator is parked for maintenance, the vehicle ladder automatically unfolds. Maintenance personnel can smoothly and quickly get on and off the vibrator vehicle, and the risk of falling when getting on and off the vibrator vehicle is reduced to zero. When the vibrator is under construction and moving forward, the vehicle ladder automatically folds. Regardless of the construction terrain, the vehicle ladder can be fully protected, and the damage rate of the vehicle ladder is zero, saving the maintenance time of the original vehicle ladder. The original vehicle ladder maintenance time can be used for the construction production of the seismic crew, improving the work efficiency of the seismic crew and achieving the purpose of cost reduction and efficiency increase.

[0079] The present application also proposes a vibrator vehicle, including the above-mentioned vibrator automatic retraction, extension, and folding vehicle ladder system.

[0080] The advantages of the vibrator vehicle and the above-mentioned ladder system over the prior art are the same, which will not be elaborated here.

[0081] It should be noted that each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0082] It should also be noted that in this text, the orientation or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations, nor can they be construed as indicating or implying relative importance. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or terminal device comprising the element.

[0083] The technical solutions provided by the present application have been introduced in detail above. Specific examples are used herein to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only for helping to understand the present application, and the content of this specification should not be construed as a limitation to the present application. At the same time, for those of ordinary skill in the art, based on the present application, there will be various forms of changes in the specific implementation manners and application scopes. It is not necessary and impossible to enumerate all the implementation manners here, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A controllable vibration source automatic retractable and foldable ladder system, characterized in that, Comprising: A ladder, arranged at the bottom of the vibration source platform, one end of the ladder is hinged to the vibration source platform, and the other end of the ladder is a free end; The ladder includes a folded state and an unfolded state. In the folded state, the ladder is in a first position, and the free end of the ladder is close to the bottom of the vibration source platform; In the unfolded state, the ladder is in a second position, and the free end of the ladder is far from the bottom of the vibration source platform; A driving device, installed on the vibration source platform and connected to the ladder, for driving the ladder to rotate around the hinge position; A control device, connected to the driving device, for controlling the driving device to drive the ladder to rotate from the first position to the second position along a first direction according to the parking signal of the vibration source vehicle, or for controlling the driving device to drive the ladder to rotate from the second position to the first position along a second direction according to the driving signal of the vibration source vehicle.

2. The controllable vibration source automatic retractable and foldable ladder system according to claim 1, characterized in that: The driving device includes a hydraulic cylinder, the hydraulic cylinder is hinged to the vibration source platform, and the end of the piston rod of the hydraulic cylinder is connected to the ladder; The control device is connected to the hydraulic cylinder, and is used for controlling the piston rod of the hydraulic cylinder to extend according to the parking signal, so that the ladder rotates from the first position to the second position along a first direction, or for controlling the piston rod of the hydraulic cylinder to contract according to the driving signal, so that the ladder rotates from the second position to the first position along a second direction.

3. The controllable vibration source automatic retractable and foldable ladder system according to claim 2, characterized in that: The control device includes a directional control valve, a first fluid system, a liquid storage tank and a directional control module; The first end of the directional control valve is connected to the first end of the hydraulic cylinder, and the second end of the directional control valve is connected to the second end of the hydraulic cylinder; the third end of the directional control valve is connected to the first fluid system, and the first fluid system is used for providing a first working fluid into the hydraulic cylinder; the fourth end of the directional control valve is connected to the liquid storage tank, and the liquid storage tank is used for receiving the first working fluid flowing out of the hydraulic cylinder; The directional control valve includes a first working state and a second working state; In the first working state, the directional control valve is used for controlling the first working fluid in the first fluid system to flow into the first end of the hydraulic cylinder, and the first working fluid at the second end of the hydraulic cylinder flows back to the liquid storage tank, so that the piston rod of the hydraulic cylinder contracts; In the second working state, the directional control valve is used for controlling the first working fluid in the first fluid system to flow into the second end of the hydraulic cylinder, and the first working fluid at the first end of the hydraulic cylinder flows back to the liquid storage tank, so that the piston rod of the hydraulic cylinder extends; The directional control module is connected to the directional control valve, and is used for controlling the directional control valve to be in the second working state according to the parking signal, or for controlling the directional control valve to be in the first working state according to the driving signal.

4. The controllable vibration source automatic retractable and foldable ladder system according to claim 3, characterized in that: The directional control valve includes a two-position four-way hydraulic directional control valve.

5. The controllable vibration source automatic retractable and foldable ladder system according to claim 4, characterized in that: The commutation control module includes: A parking brake circuit, connected to the commutation valve; A second fluid system, connected to the parking brake circuit, for supplying a second working fluid to the parking brake circuit; the second working fluid is used to drive the valve core of the commutation valve to move, so that the commutation valve switches from the first working state to the second working state; A vehicle running system control valve group, respectively connected to the second fluid system and the parking brake circuit, for controlling the communication between the second fluid system and the parking brake circuit according to a parking signal, or for controlling the disconnection between the second fluid system and the parking brake circuit according to a driving signal.

6. The controllable vibration source automatic retractable and foldable vehicle ladder system according to claim 3, characterized in that: A throttle valve is further provided between the commutation valve and the hydraulic cylinder. One end of the throttle valve is communicated with the commutation valve, and the other end is communicated with the hydraulic cylinder. The throttle valve is used to adjust the flow rate of the first working fluid flowing into or out of the hydraulic cylinder.

7. The controllable vibration source automatic retractable and foldable vehicle ladder system according to claim 2, characterized in that: The number of the vehicle ladders is set to be multiple, and the number of the hydraulic cylinders is set to be multiple. The multiple vehicle ladders correspond to the multiple hydraulic cylinders one by one; The control device is simultaneously connected to multiple hydraulic cylinders, and is used to simultaneously control the piston rods of the multiple hydraulic cylinders to extend according to a parking signal, so that the multiple vehicle ladders simultaneously rotate to a second position along a first direction, or to simultaneously control the piston rods of the multiple hydraulic cylinders to contract according to a driving signal, so that the multiple vehicle ladders simultaneously rotate to a first position along a second direction.

8. A vibrator vehicle, characterized in that: It includes the controllable vibration source automatic retractable and foldable vehicle ladder system according to any one of claims 1-7.

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