Boosting climbing hydraulic system of pipelayer and pipelayer

Abstract

The invention discloses a boosted climbing hydraulic system of a pipelayer and the pipelayer. In the system, a posture adjusting oil cylinder is connected with an inverse proportional overflow valve and an oil source through a posture reversing valve; a pressure maintaining valve is arranged between the posture adjusting oil cylinder and the posture reversing valve; the boosting walking motor is connected with an oil source through a boosting reversing valve; the left main walking motor is connected with an oil source through a left walking reversing valve; the right main walking motor is connected with an oil source through a right walking reversing valve; the control ends of the inverse proportion overflow valve, the posture reversing valve, the right walking reversing valve, the left walking reversing valve and the boosting reversing valve are electrically connected with a controller, and the controller is configured to execute set boosting climbing logic according to posture information of the pipe hoisting machine. According to the invention, the boosting crawler belt is additionally arranged, so that the grounding specific pressure and stability of the whole vehicle are improved, the climbing and slope-holding pipe lifting operation capability under the slope of 35 degrees or below is improved, and the operation efficiency of the pipe lifting machine, the working condition adaptability of slope construction and the safety of abrupt slope operation are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipe-laying machines, and particularly relates to a pipe-laying machine boost climbing hydraulic system and a pipe-laying machine. Background Art

[0002] During the operation of the pipe-laying machine on a slope, with the changes in the slope and working attitude, the overall vehicle's slope holding and climbing capabilities become worse, and dangerous situations such as slope slipping may occur. Currently, when the pipe-laying machine is constructing at an actual construction site, the maximum climbing slope is generally 25°, and the stable operating slope is generally around 22°. However, for the pipe-laying machine used in mountainous areas, due to the constraints of the surface conditions, the climbing ability of the excavator generally shows a decreasing trend with the change of the landform, seriously affecting the adaptability of the pipe-laying machine to the terrain.

[0003] Currently, for large-slope slopes, methods such as slope reduction and building a "zigzag" road are generally adopted. The methods of slope reduction and building a "zigzag" road will bring hazards such as a large occupied area, landform change, and vegetation damage. Moreover, during the construction process, the surface soil mass is deeply disturbed, making the surface of the equipment passage loose and uneven in hardness. This brings great difficulties and safety risks to subsequent construction. Summary of the Invention

[0004] To solve the deficiencies in the prior art, the present invention provides a pipe-laying machine boost climbing hydraulic system and a pipe-laying machine. By installing boost crawlers, the ground contact pressure and stability of the whole vehicle are improved, the climbing and slope holding pipe-laying operation capabilities below a slope of 35° are enhanced, and the operation efficiency of the pipe-laying machine, the working condition adaptability of slope construction, and the safety of steep slope operation are improved.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: In the first aspect, a pipe-laying machine boost climbing hydraulic system is provided, including: an attitude adjustment cylinder for adjusting the attitude of the boost crawler, the large chamber of the attitude adjustment cylinder is connected to the first outlet of the attitude reversing valve, the small chamber is connected to the second outlet of the attitude reversing valve, and the inlet of the attitude reversing valve is connected to the inlet of the inverse proportional relief valve and the oil source; a pressure holding valve is arranged on the hydraulic pipeline between the attitude adjustment cylinder and the attitude reversing valve; a boost walking motor for driving the boost crawler to walk, the working oil port of the boost walking motor is connected to the outlet of the boost reversing valve, and the inlet of the boost reversing valve is connected to the oil source; a left main walking motor, the working oil port of the left main walking motor is connected to the outlet of the left walking reversing valve, and the inlet of the left walking reversing valve is connected to the oil source; a right main walking motor, the working oil port of the right main walking motor is connected to the outlet of the right walking reversing valve, and the inlet of the right walking reversing valve is connected to the oil source; the control ends of the inverse proportional relief valve, the attitude reversing valve, the right walking reversing valve, the left walking reversing valve, and the boost reversing valve are respectively electrically connected to the controller, and the controller is configured to: collect the attitude information of the pipe-laying machine; execute a set boost climbing logic according to the attitude information of the pipe-laying machine.

[0006] Further, it further includes a first overflow valve and a second overflow valve. The inlet of the first overflow valve is connected to the second outlet of the attitude reversing valve, the inlet of the second overflow valve is connected to the first outlet of the attitude reversing valve, and the outlets of the first overflow valve and the second overflow valve are connected to the fuel tank.

[0007] Further, the attitude adjustment oil cylinder includes a left boosting attitude adjustment oil cylinder and a right boosting attitude adjustment oil cylinder; the pressure holding valve includes a left pressure holding valve for holding the oil pressure of the left boosting attitude adjustment oil cylinder and a right pressure holding valve for holding the oil pressure of the right boosting attitude adjustment oil cylinder; the pressure holding valve is a two-way balance valve or a two-way hydraulically controlled one-way valve.

[0008] Further, it further includes a first pressure sensor for detecting the pilot pressure when the left main travel motor retreats, a second pressure sensor for detecting the pilot pressure when the left main travel motor advances, a third pressure sensor for detecting the pilot pressure when the right main travel motor retreats, a fourth pressure sensor for detecting the pilot pressure when the right main travel motor advances, a fifth pressure sensor for detecting the pressure in the large chamber of the left boosting attitude adjustment oil cylinder, a sixth pressure sensor for detecting the pressure in the large chamber of the right boosting attitude adjustment oil cylinder, a seventh pressure sensor for detecting the pressure in the small chamber of the left boosting attitude adjustment oil cylinder, and an eighth pressure sensor for detecting the pressure in the small chamber of the right boosting attitude adjustment oil cylinder.

[0009] Further, it further includes a main crawler travel pilot foot valve for controlling the travel direction and speed of the main crawler of the pipe crane, and an electro-hydraulic proportional valve for controlling the pilot pressure of the main valve, thereby controlling the travel speed and direction of the boosting crawler.

[0010] Further, execute a set boosting climbing logic according to the attitude information of the pipe crane, including: in response to receiving a control instruction to enter the boosting mode, collect the angle between the lower vehicle of the pipe crane and the horizontal plane through an inclination sensor installed on the lower vehicle of the pipe crane; adjust the set pressure of the inverse proportional overflow valve according to the angle, thereby adjusting the downward pressure of the boosting crawler.

[0011] Further, execute a set boosting climbing logic according to the attitude information of the pipe crane, and it further includes: control the attitude reversing valve to switch to the right position, the large chamber of the attitude adjustment oil cylinder is filled with oil, the piston rod extends, and the boosting crawler presses down to contact the ground; the stroke sensor of the attitude adjustment oil cylinder detects the cylinder stroke at this time, and according to the current value of the electromagnet of the attitude adjustment inverse proportional overflow valve at this time, correspondingly adjust the pressure value in the large chamber of the attitude adjustment oil cylinder; when the pressure sensor in the large chamber of the attitude adjustment oil cylinder detects that the pressure reaches the set value, the attitude reversing valve switches to the middle position, the piston rod stops extending, and the attitude adjustment of the boosting crawler ends; the pressures in the large and small chambers of the attitude adjustment oil cylinder are maintained by the pressure holding valve.

[0012] Further, executing the set boost climbing logic according to the attitude information of the pipe crane further includes: after the attitude adjustment of the boost crawler is completed, entering the boost walking mode, and in response to receiving the control instruction to enter the boost walking mode, changing the walking speed and direction of the boost crawler according to the current values of the electromagnets Y1 and Y2 of the electro-hydraulic proportional valve V2, so that the walking direction of the boost crawler is the same as that of the main crawler, and the speed of the boost crawler is greater than that of the main crawler.

[0013] Further, executing the set boost climbing logic according to the attitude information of the pipe crane further includes: after the boost walking is completed, controlling the attitude reversing valve to switch to the left position, the small chamber of the attitude adjustment cylinder is filled with oil, the piston rod retracts, and the boost crawler leaves the ground.

[0014] In a second aspect, a pipe crane is provided, and the pipe crane is configured with the pipe crane boost climbing hydraulic system described in the first aspect.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention adjusts the attitude of the boost crawler through the attitude adjustment cylinder, the large chamber of the attitude adjustment cylinder is connected to the first outlet of the attitude reversing valve, the small chamber is connected to the second outlet of the attitude reversing valve, and the inlet of the attitude reversing valve is connected to the inlet of the inverse proportional overflow valve and the oil source; a pressure holding valve is arranged on the hydraulic pipeline between the attitude adjustment cylinder and the attitude reversing valve; the boost walking motor drives the boost crawler to walk, the working oil port of the boost walking motor is connected to the outlet of the boost reversing valve, and the inlet of the boost reversing valve is connected to the oil source; the working oil port of the left main walking motor is connected to the outlet of the left walking reversing valve, and the inlet of the left walking reversing valve is connected to the oil source; the working oil port of the right main walking motor is connected to the outlet of the right walking reversing valve, and the inlet of the right walking reversing valve is connected to the oil source; the control ends of the inverse proportional overflow valve, the attitude reversing valve, the right walking reversing valve, the left walking reversing valve and the boost reversing valve are respectively electrically connected to the controller, and the controller is configured to: collect the attitude information of the pipe crane; execute the set boost climbing logic according to the attitude information of the pipe crane; improve the ground contact pressure and stability of the whole vehicle, improve the climbing and parking pipe lifting operation capabilities below a slope of 35°, and improve the operation efficiency of the pipe crane, the working condition adaptability of ramp construction and the safety of steep slope operation. Description of the Drawings

[0016] Figure 1 is a top view of a boost structure of a pipe crane provided by an embodiment of the present invention; Figure 2 is a side view of a boost structure of a pipe crane provided by an embodiment of the present invention; Figure 3 is a logic schematic diagram of boost climbing of a pipe crane in an embodiment of the present invention; Figure 4 is a schematic diagram of a pipe crane boost climbing hydraulic system provided by an embodiment of the present invention; In the figure: V1, main track walking pilot foot valve; V2, electro-hydraulic proportional valve; V3, inverse proportional overflow valve; V4, attitude reversing valve; V5, overflow valve 1; V6, overflow valve 2; V7, left pressure holding valve; V8, right pressure holding valve; V9, right walking reversing valve; V10, left walking reversing valve; V11, boost reversing valve; G1, left main walking motor reducer; G2, right main walking motor reducer; G3, left boost walking motor reducer; G4, right boost walking motor reducer; G5, left boost attitude adjustment cylinder; G6, right boost attitude adjustment cylinder; F1~F8, pressure sensors 1 to 8. Detailed implementation manners

[0017] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0018] Embodiment 1 As Figures 1 to 4 shown, a pipe crane boost climbing hydraulic system includes: an attitude adjustment cylinder for adjusting the attitude of the boost track, the large chamber of the attitude adjustment cylinder is connected to the first outlet of the attitude reversing valve V4, the small chamber is connected to the second outlet of the attitude reversing valve V4, and the inlet of the attitude reversing valve V4 is connected to the inlet of the inverse proportional overflow valve V3 and the oil source; a pressure holding valve is arranged on the hydraulic pipeline between the attitude adjustment cylinder and the attitude reversing valve V4; a boost walking motor for driving the boost track to walk, the working oil port of the boost walking motor is connected to the outlet of the boost reversing valve V11, and the inlet of the boost reversing valve V11 is connected to the oil source; a left main walking motor, the working oil port of the left main walking motor is connected to the outlet of the left walking reversing valve V10, and the inlet of the left walking reversing valve V10 is connected to the oil source; a right main walking motor, the working oil port of the right main walking motor is connected to the outlet of the right walking reversing valve V9, and the inlet of the right walking reversing valve V9 is connected to the oil source; the control ends of the inverse proportional overflow valve V3, the attitude reversing valve V4, the right walking reversing valve V9, the left walking reversing valve V10 and the boost reversing valve V11 are respectively electrically connected to the controller, and the controller is configured to: collect the attitude information of the pipe crane; execute the set boost climbing logic according to the attitude information of the pipe crane.

[0019] The main crawler travel pilot foot valve V1 is used to control the direction and speed of the main crawler travel of the pipe crane. The electro-hydraulic proportional valve V2 is a two-stage electro-hydraulic proportional valve, which is used to control the pilot pressure of the main valve bucket rod spool, and then control the travel speed and direction of the booster crawler. The inverse proportional overflow valve V3 is used to control the downward pressure of the booster crawler on the ground. The attitude reversing valve V4 is a three-position four-way proportional reversing valve, which controls the attitude adjustment of the booster crawler. The inlet of the first relief valve V5 is connected to the second outlet of the attitude reversing valve V4, and the inlet of the second relief valve V6 is connected to the first outlet of the attitude reversing valve V4. The outlets of the first relief valve V5 and the second relief valve V6 are connected to the oil tank. The first relief valve V5 and the second relief valve V6 are used to ensure the safety of the oil circuits of the large and small chambers of the booster crawler attitude adjustment cylinder.

[0020] The attitude adjustment cylinder includes a left booster attitude adjustment cylinder G5 and a right booster attitude adjustment cylinder G6 with stroke sensors; the pressure holding valve includes a left pressure holding valve V7 for maintaining the oil pressure of the left booster attitude adjustment cylinder G5 and a right pressure holding valve V8 for maintaining the oil pressure of the right booster attitude adjustment cylinder G6; the pressure holding valve can be a two-way balance valve or a two-way hydraulically controlled one-way valve.

[0021] F1~F8 are the first to eighth pressure sensors. The first pressure sensor F1 is used to detect the pilot pressure when the left main travel motor retreats, the second pressure sensor F2 is used to detect the pilot pressure when the left main travel motor advances, the third pressure sensor F3 is used to detect the pilot pressure when the right main travel motor retreats, the fourth pressure sensor F4 is used to detect the pilot pressure when the right main travel motor advances, the fifth pressure sensor F5 is used to detect the large chamber pressure of the left booster attitude adjustment cylinder G5, the sixth pressure sensor F6 is used to detect the large chamber pressure of the right booster attitude adjustment cylinder G6, the seventh pressure sensor F7 is used to detect the small chamber pressure of the left booster attitude adjustment cylinder G5, and the eighth pressure sensor F8 is used to detect the small chamber pressure of the right booster attitude adjustment cylinder G6.

[0022] In the present invention, the attitude reversing valve V4, the right travel reversing valve V9, the left travel reversing valve V10 and the booster reversing valve V11 are three-position four-way proportional reversing valves. The booster travel motor includes a left booster travel motor and a right booster travel motor. The left booster travel motor is equipped with a left booster travel motor reducer G3, and the right booster travel motor is equipped with a right booster travel motor reducer G4. The left main travel motor is equipped with a left main travel motor reducer G1, and the right main travel motor is equipped with a right main travel motor reducer G2.

[0023] During operation, the operator clicks the boost mode on the screen, and the whole vehicle enters the boost mode. In response to receiving the control instruction to enter the boost mode, the inclination sensor installed on the lower vehicle of the pipe crane collects the angle between the lower vehicle of the pipe crane and the horizontal plane, so as to detect the current slope; the set pressure of the inverse proportional overflow valve V3 is adjusted according to the angle, that is, the upper limit of the pressure value of the large chamber of the boost attitude oil cylinder is adjusted to P5, and then the downward pressure of the boost crawler is adjusted.

[0024] The electromagnet Y4 of the attitude reversing valve V4 is energized, controlling the attitude reversing valve V4 to reverse to the right position, the large chambers of the left boost attitude adjustment cylinder G5 and the right boost attitude adjustment cylinder G6 are supplied with oil, the piston rods extend, and the boost crawler presses down to contact the ground.

[0025] The stroke sensors of the left boost attitude adjustment cylinder G5 and the right boost attitude adjustment cylinder G6 detect the cylinder stroke at this time. According to the current value of the electromagnet Y3 of the attitude adjustment inverse proportional overflow valve V3 at this time, the pressure value of the large chamber of the attitude adjustment cylinder is correspondingly adjusted, that is, the value of P5 is adjusted. When the pressure sensors of the large chambers of the left boost attitude adjustment cylinder G5 and the right boost attitude adjustment cylinder G6 detect that the pressure reaches the set value P5, the electromagnet Y4 of the attitude reversing valve V4 is de-energized, the attitude reversing valve V4 reverses to the middle position, the piston rod stops extending, and the boost crawler attitude adjustment ends. The pressures of the large and small chambers of the left boost attitude adjustment cylinder G5 and the right boost attitude adjustment cylinder G6 are maintained for a long time by the left pressure holding valve V7 and the right pressure holding valve V8.

[0026] Push the main crawler walking pilot foot valve V1, and the pressure sensors F1, F2, F3, and F4 detect signals and feedback them to the controller. At this time, the straight walking valve in the main valve switches, and enters the boost walking mode. In the present invention, the oil source includes the main pump 1 and the main pump 2. The main pump 1 supplies oil for the boost crawler to walk, and the main pump 2 supplies oil for the main crawler to walk. The current values of the electromagnets Y1 and Y2 of the electro-hydraulic proportional valve V2 are adjusted according to the main crawler speed, changing the boost crawler walking speed and direction, so that the boost crawler walking direction is the same as that of the main crawler, and the speed is slightly greater than that of the main crawler, thereby improving the ground contact pressure and stability of the main crawler of the pipe crane, and realizing the climbing and slope holding operation capabilities below a slope of 35°.

[0027] After the boost walking ends, the electromagnet Y5 of the attitude reversing valve V4 is energized, controlling the attitude reversing valve V4 to reverse to the left position, the small chambers of the left boost attitude adjustment cylinder G5 and the right boost attitude adjustment cylinder G6 are supplied with oil, the piston rods retract, and the boost crawler leaves the ground. Click the corresponding button on the screen to exit the boost mode.

[0028] Embodiment 2 Based on the pipe crane boost climbing hydraulic system described in Embodiment 1, this embodiment provides a pipe crane, and the pipe crane is configured with the pipe crane boost climbing hydraulic system described in Embodiment 1.

[0029] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A pipe crane boosting and climbing hydraulic system, characterized in that, Including: An attitude adjustment oil cylinder for adjusting the attitude of the booster track. The large chamber of the attitude adjustment oil cylinder is connected to the first outlet of the attitude reversing valve (V4), and the small chamber is connected to the second outlet of the attitude reversing valve (V4). The inlet of the attitude reversing valve (V4) is connected to the inlet of the inverse proportional overflow valve (V3) and the oil source. A pressure holding valve is provided on the hydraulic pipeline between the attitude adjustment oil cylinder and the attitude reversing valve (V4). A booster walking motor for driving the booster track to walk. The working oil port of the booster walking motor is connected to the outlet of the booster reversing valve (V11), and the inlet of the booster reversing valve (V11) is connected to the oil source. A left main walking motor. The working oil port of the left main walking motor is connected to the outlet of the left walking reversing valve (V10), and the inlet of the left walking reversing valve (V10) is connected to the oil source. A right main walking motor. The working oil port of the right main walking motor is connected to the outlet of the right walking reversing valve (V9), and the inlet of the right walking reversing valve (V9) is connected to the oil source. The control ends of the inverse proportional overflow valve (V3), the attitude reversing valve (V4), the right walking reversing valve (V9), the left walking reversing valve (V10), and the booster reversing valve (V11) are respectively electrically connected to the controller. The controller is configured to: collect the attitude information of the pipe crane; execute the set booster climbing logic according to the attitude information of the pipe crane.

2. The pipe-lifting machine boosting and climbing hydraulic system according to claim 1, wherein It also includes an overflow valve I (V5) and an overflow valve II (V6). The inlet of the overflow valve I (V5) is connected to the second outlet of the attitude reversing valve (V4), and the inlet of the overflow valve II (V6) is connected to the first outlet of the attitude reversing valve (V4). The outlets of the overflow valve I (V5) and the overflow valve II (V6) are connected to the fuel tank.

3. The pipe-lifting machine boosting climbing hydraulic system according to claim 1, characterized in that, The attitude adjustment oil cylinder includes a left booster attitude adjustment oil cylinder (G5) and a right booster attitude adjustment oil cylinder (G6); the pressure holding valve includes a left pressure holding valve (V7) for maintaining the oil pressure of the left booster attitude adjustment oil cylinder (G5) and a right pressure holding valve (V8) for maintaining the oil pressure of the right booster attitude adjustment oil cylinder (G6); the pressure holding valve is a two-way balance valve or a two-way hydraulically controlled check valve.

4. The pipe-lifting machine boosting climbing hydraulic system according to claim 3, wherein It also includes a pressure sensor I (F1) for detecting the pilot pressure when the left main walking motor retreats, a pressure sensor II (F2) for detecting the pilot pressure when the left main walking motor advances, a pressure sensor III (F3) for detecting the pilot pressure when the right main walking motor retreats, a pressure sensor IV (F4) for detecting the pilot pressure when the right main walking motor advances, a pressure sensor V (F5) for detecting the pressure of the large chamber of the left booster attitude adjustment oil cylinder (G5), a pressure sensor VI (F6) for detecting the pressure of the large chamber of the right booster attitude adjustment oil cylinder (G6), a pressure sensor VII (F7) for detecting the pressure of the small chamber of the left booster attitude adjustment oil cylinder (G5), and a pressure sensor VIII (F8) for detecting the pressure of the small chamber of the right booster attitude adjustment oil cylinder (G6).

5. The pipe-lifting machine boosting and climbing hydraulic system according to claim 1, wherein It also includes a main track walking pilot foot valve (V1) for controlling the walking direction and speed of the main track of the pipe crane and an electro-hydraulic proportional valve (V2) for controlling the pilot pressure of the main valve and thus controlling the walking speed and direction of the booster track.

6. The pipe-lifting machine boosting and climbing hydraulic system according to claim 5, wherein, Executing the set booster climbing logic according to the attitude information of the pipe crane includes: In response to receiving a control instruction to enter the boost mode, the angle between the lower vehicle of the pipe crane and the horizontal plane is collected by an inclination sensor installed on the lower vehicle of the pipe crane; the set pressure of the inverse proportional overflow valve (V3) is adjusted according to the angle, and then the downward pressure of the boost track is adjusted.

7. The pipe-lifting machine boosting and climbing hydraulic system according to claim 6, characterized in that, Executing the set boost climbing logic according to the attitude information of the pipe crane further includes: Controlling the attitude change-over valve (V4) to change over to the right position, the large chamber of the attitude adjustment cylinder is supplied with oil, the piston rod extends, and the boost track presses down to contact the ground; The stroke sensor of the attitude adjustment cylinder detects the cylinder stroke at this time, and according to the current value of the electromagnet of the attitude adjustment inverse proportional overflow valve (V3) at this time, the pressure value of the large chamber of the attitude adjustment cylinder is correspondingly adjusted; when the pressure sensor of the large chamber of the attitude adjustment cylinder detects that the pressure reaches the set value, the attitude change-over valve (V4) changes over to the middle position, the piston rod stops extending, and the attitude adjustment of the boost track ends; the pressures of the large and small chambers of the attitude adjustment cylinder are maintained by the pressure holding valve.

8. The pipe-lifting machine boosting and climbing hydraulic system according to claim 7, wherein, Executing the set boost climbing logic according to the attitude information of the pipe crane further includes: After the attitude adjustment of the boost track ends, enter the boost walking mode. In response to receiving a control instruction to enter the boost walking mode, According to the current values of the electromagnets Y1 and Y2 of the electro-hydraulic proportional valve V2, the walking speed and direction of the boost track are changed, so that the walking direction of the boost track is the same as that of the main track, and the speed of the boost track is greater than that of the main track.

9. The pipe crane boosting climbing hydraulic system according to claim 8, wherein Executing the set boost climbing logic according to the attitude information of the pipe crane further includes: After the boost walking ends, control the attitude change-over valve (V4) to change over to the left position, the small chamber of the attitude adjustment cylinder is supplied with oil, the piston rod retracts, and the boost track leaves the ground.

10. A pipe crane, characterized in that, The pipe crane is configured with the pipe crane boost climbing hydraulic system according to any one of claims 1 to 9.

Images