阅读说明：本技术 适用于线杆综合作业车的伸缩臂架控制装置及作业车辆 (Telescopic boom control device suitable for line pole comprehensive operation vehicle and operation vehicle ) 是由 陈时妹 王滕 张建朋 柳银鹏 杨畅 于 2021-07-28 设计创作，主要内容包括：本申请提供了一种适用于线杆综合作业车的伸缩臂架控制装置及作业车辆,涉及臂架控制领域,其技术要点是：所述平台操作阀组包括平台切换选择阀、二节臂控制换向阀和三节臂控制换向阀,所述平台操作阀组用于控制所述油泵出油的流向,所述控制阀组包括有第一顺序阀和第二顺序阀,第一顺序阀的出油端连接至二节臂伸缩缸的无杆腔,第二顺序阀的出油端连接至三节臂伸缩缸的有杆腔；所述平台切换选择阀、所述平台操作阀组第一顺序阀和第二顺序阀用于控制所述二节金属伸缩臂与所述三节绝缘伸缩臂的顺序伸缩；所述二节臂控制换向阀和三节臂控制换向阀分别用于控制所述二节金属伸缩臂与所述三节绝缘伸缩臂的独立伸缩。(The application provides a flexible cantilever crane controlling means and operation vehicle suitable for line pole combined operation car relates to cantilever crane control field, and its technical essential is: the platform operation valve group comprises a platform switching selection valve, a two-section arm control reversing valve and a three-section arm control reversing valve, the platform operation valve group is used for controlling the flow direction of oil output of the oil pump, the control valve group comprises a first sequence valve and a second sequence valve, the oil output end of the first sequence valve is connected to a rodless cavity of the two-section arm telescopic cylinder, and the oil output end of the second sequence valve is connected to a rod cavity of the three-section arm telescopic cylinder; the platform switching selection valve, the platform operation valve set first sequence valve and the second sequence valve are used for controlling sequential extension of the two sections of metal telescopic arms and the three sections of insulating telescopic arms; the two-section arm control reversing valve and the three-section arm control reversing valve are respectively used for controlling independent extension of the two-section metal telescopic arm and the three-section insulating telescopic arm.)

1. A telescopic boom control device suitable for a wire rod comprehensive working vehicle comprises a rotary table (19), three sections of insulating telescopic booms, two sections of metal telescopic booms, a three-section boom telescopic cylinder (15), a three-section boom balance valve (16), a two-section boom telescopic cylinder (17), a two-section boom balance valve (18), an oil pump (8) and an oil tank (7), wherein the telescopic control of the three sections of metal telescopic booms and the two sections of metal telescopic booms is realized by the three-section boom telescopic cylinder (15) and the two-section boom telescopic cylinder (17) respectively, and the three-section boom telescopic cylinder (15) and the two-section boom telescopic cylinder (17) are supplied with oil by the oil pump (8), and is characterized in that a control valve group (30) and a rotary table operation valve group (40) are arranged at the lower end of the rotary table (19), and a platform operation valve group (50) is arranged at the tops of the three sections of insulating telescopic booms and the two sections of metal telescopic booms;

the platform operation valve group (50) comprises a platform switching selection valve (11), a two-section arm control reversing valve (12) and a three-section arm control reversing valve (13), the platform operation valve group (50) is used for controlling the flow direction of oil output of the oil pump (8), and the platform switching selection valve (11) is connected with the platform operation valve group (50) in series;

the control valve group (30) comprises a first sequence valve (1) and a second sequence valve (2), the first sequence valve (1) and the second sequence valve (2) are respectively connected to two oil paths at the rear end of the platform operation valve group (50), the oil outlet end of the first sequence valve (1) is connected to a rodless cavity of the two-section arm telescopic cylinder (17), and the oil outlet end of the second sequence valve (2) is connected to a rod cavity of the three-section arm telescopic cylinder (15);

the platform switching selection valve (11), the platform operation valve group (50), the first sequence valve (1) and the second sequence valve (2) are used for controlling sequential extension of the two sections of metal telescopic arms and the three sections of insulating telescopic arms; and the two-section arm control reversing valve (12) and the three-section arm control reversing valve (13) are respectively used for controlling the independent extension of the two-section metal telescopic arm and the three-section insulating telescopic arm.

2. The telescopic boom control device suitable for the line pole comprehensive working vehicle as claimed in claim 1, wherein a platform switching selection valve (11) for switching the operating platform is arranged between the turntable operating valve group (40) and the platform operating valve group (50).

3. The boom extension and retraction control device for a line and pole integrated working vehicle as claimed in claim 2, wherein the platform operation valve set (50) comprises a boom extension and retraction control directional control valve (14), and the first working oil port a and the second working oil port B of the boom extension and retraction control directional control valve (14) are respectively communicated with the T2R port and the T3E port of the control valve set (30) through pipelines.

4. The telescopic boom control device suitable for the line and pole integrated working vehicle as claimed in claim 3, wherein the rodless cavity of the three-section telescopic boom cylinder (15) is communicated with the port C3E of the control valve group (30) through the three-section balance valve (16), and the rod cavity of the three-section telescopic boom cylinder (15) is communicated with the port C3R of the control valve group (30) through the three-section balance valve (16); the rodless cavity of the two-section arm telescopic cylinder (17) is connected with a C2E port of the control valve group (30) through the two-section arm balance valve (18), and the rod cavity of the two-section arm telescopic cylinder (17) is communicated with a C2R port of the control valve group (30) through the two-section arm balance valve (18).

5. The telescopic boom control device suitable for the line pole comprehensive working vehicle as claimed in claim 4, wherein the control valve group (30) further comprises a first damping oil duct (6-1), a second damping oil duct (6-2), a first shuttle valve (3-1), a second shuttle valve (3-2), a first hydraulic control one-way valve (4-1), a second hydraulic control one-way valve (4-2), a first one-way valve (5-1), a second one-way valve (5-2), a third one-way valve (5-3), a fourth one-way valve (5-4), a fifth one-way valve (5-5), a sixth one-way valve (5-6), a seventh one-way valve (5-7), an eighth one-way valve (5-8) and a ninth one-way valve (5-9);

the outlet c1 of the first shuttle valve (3-1) is communicated with the control port k1 of the first hydraulic control one-way valve (4-1), and the outlet c2 of the second shuttle valve (3-2) is communicated with the control port k2 of the second hydraulic control one-way valve (4-2);

an inlet of the first sequence valve (1) is communicated with an oil port T3E, an oil inlet a1 at one side of the first shuttle valve (3-1) and an inlet of the first check valve (5-1) through oil passages, and an outlet of the first sequence valve (1) is communicated with an oil port T2E, an oil inlet b1 at the other side of the first shuttle valve (3-1) and an inlet of the third check valve (5-3) through oil passages; an inlet of the second sequence valve (2) is communicated with an oil port T2R, an oil inlet b2 at one side of the second shuttle valve (3-2) and an inlet of the fourth check valve (5-4) through oil passages, an outlet of the second sequence valve (2) is communicated with an oil port T3R, an oil inlet a2 at the other side of the second shuttle valve (3-2) and an inlet of the second check valve (5-2) through oil passages, and oil drainage of spring cavities of the first sequence valve (1) and the second sequence valve (2) is communicated with an inlet of the ninth one-way valve (5-9), a damping oil passage of an outlet c1 of the first shuttle valve (3-1) and a damping oil passage of an outlet c2 of the second shuttle valve (3-2) through oil passages, and an outlet of the ninth one-way valve (5-9) is connected back to the oil tank (7).

6. The telescopic boom control device suitable for the line and pole integrated working vehicle as claimed in claim 5, wherein the first working oil port A1 of the first joint platform switching selector valve set (40) is communicated with the oil return T port of the platform operating valve set (40) through a pipeline, and the second working oil port B1 of the platform switching selector valve (11) is communicated with the oil inlet P port of the platform operating valve set (50) through a pipeline; the second joint of the rotary table operation valve group (40) is a first working oil port A2 and a second working oil port B2 of a two-section arm control reversing valve (12), and the two working oil ports are respectively communicated with a port 2R and a port 2E of the control valve group (30) through pipelines; the third set of the turntable operation valve group (40) is a first working oil port A3 and a second working oil port B3 of the three-arm control reversing valve (13), and the three-arm control reversing valve is respectively communicated with a port 3R and a port 3E of the control valve group (30) through pipelines.

7. The telescopic boom control device suitable for the line pole comprehensive working vehicle as claimed in claim 1, wherein the rotary table operation valve group (40) and the platform operation valve group (50) are manual reversing multi-way valve groups.

8. The telescopic boom control device suitable for the line pole comprehensive working vehicle as claimed in claim 1, further comprising a pressure gauge (10), wherein an inlet of the pressure gauge (10) is communicated with an outlet of the oil pump (8) and an inlet of the turntable operation valve group (40).

9. A work vehicle, characterized by comprising: an arm support and a telescopic arm support control device suitable for the line pole comprehensive operation vehicle as claimed in any one of the claims 1 to 8.

Technical Field

The application relates to the field of boom control, in particular to a telescopic boom control device suitable for a line pole comprehensive operation vehicle.

Background

The utility model provides a line pole comprehensive operation car, is a multi-functional electric power basic construction equipment, has functions such as lifting by crane, drilling, holds up the pole, dead man, line pole and high altitude construction, is applicable to line pole laying construction such as wooden pole, cement pole and high altitude, or live working aloft. The line pole comprehensive operation vehicle is not widely used. The boom frame usually adopts the structural form of three (or more than three) sections of telescopic booms, wherein the innermost section, namely three sections of booms, is an insulating boom, the outermost basic boom, namely one section of boom and the middle section of boom are metal booms, when the comprehensive operation vehicle for the line pole is used as an overhead working vehicle, especially when an operator is arranged at a platform for live-line overhead operation, in order to ensure the insulating property of the vehicle and protect the safety of platform operators, when the telescopic booms are required to be operated to extend outwards, firstly, the three sections of insulating booms are required to be completely extended, then the two sections of metal booms can be extended out, namely, the two and three sections of telescopic booms are required to be operated sequentially; when the vehicle carries out operations such as drilling, wire pole, dead man, the operating personnel need operate at the lower part revolving stage department of vehicle, does not allow to stretch three section insulating arms again this moment, only allows to stretch out two sections metal arms and just can carry out operations such as drilling, wire pole, so the operation control below the revolving stage does not allow automatic sequence operation again, must carry out independent operation control to two sections metal arms, three section insulating arms.

In the prior art, in the aspect of control technology for sequential extension and retraction of an arm support oil cylinder, some sequential extension and retraction control is triggered by utilizing a specially-made stroke valve on the oil cylinder, and the control device has a complex structure and poor reliability and maintainability; some valve blocks or other hydraulic valve elements controlled sequentially in a telescopic mode are arranged at the tail of the oil cylinder or the end of the piston rod and cannot be arranged due to the limitation of narrow space of the telescopic arm; some sequential telescopic control is realized by using an electric control mode, and electric control elements such as an electromagnetic valve, a travel switch or a proximity switch are adopted, so that the sequential telescopic control is inconvenient to apply and high in electric control failure rate due to the fact that the sequential telescopic control relates to electric control, and is difficult to implement in the occasion of an insulating arm operation vehicle with electric operation; and the prior patent technology can only realize sequential operation and can not realize independent operation control according to different requirements of operation positions.

A special equipment to line pole comprehensive operation car collects and lifts by crane, drilling, holds up the pole, dead man, line pole and high altitude construction etc. multi-functional integrative special equipment, according to the operation operating mode of difference, the flexible operation control of its cantilever crane must satisfy simultaneously: the requirement that sequential operation can be realized at the top of the platform and independent operation and control are required at the lower part of the rotary table is not available in the prior art.

Disclosure of Invention

The embodiment of the application provides a telescopic boom control device suitable for a line pole comprehensive operation vehicle, and aims to solve the problems that in related technologies, telescopic operation control of a boom is achieved simultaneously, sequential operation can be achieved at the top of a platform, and independent operation control can be achieved at the lower portion of a rotary table.

In an embodiment of the application, a telescopic boom control device suitable for a wire rod comprehensive working vehicle is provided, and comprises a rotary table, three sections of insulating telescopic booms, two sections of metal telescopic booms, three sections of arm telescopic cylinders, three sections of arm balance valves, two sections of arm telescopic cylinders, two sections of arm balance valves, an oil pump and an oil tank, wherein the telescopic control of the three sections of metal telescopic booms and the two sections of metal telescopic booms is realized by the three sections of arm telescopic cylinders (15) and the two sections of arm telescopic cylinders (17) respectively, the three sections of arm telescopic cylinders (15) and the two sections of arm telescopic cylinders (17) are supplied with oil by the oil pump (8), a control valve bank and a rotary table operation valve bank are arranged at the lower end of the rotary table, and platform operation valve banks are arranged at the tops of the three sections of insulating telescopic booms and the two sections of metal telescopic booms;

the platform operation valve group (50) comprises a platform switching selection valve (11), a two-section arm control reversing valve (12) and a three-section arm control reversing valve (13), the platform operation valve group (50) is used for controlling the flow direction of oil output of the oil pump (8), the platform switching selection valve (11) is connected with the platform operation valve group (50) in series, the control valve group (30) comprises a first sequence valve (1) and a second sequence valve (2), the first sequence valve (1) and the second sequence valve (2) are respectively connected to two oil paths at the rear end of the platform operation valve group (50), the oil outlet end of the first sequence valve (1) is connected to a rodless cavity of the two-section arm telescopic cylinder (17), and the oil outlet end of the second sequence valve (2) is connected to a rod cavity of the three-section arm telescopic cylinder (15); the platform switching selection valve (11), the platform operation valve group (50), the first sequence valve (1) and the second sequence valve (2) are used for controlling sequential extension of the two sections of metal telescopic arms and the three sections of insulating telescopic arms; and the two-section arm control reversing valve (12) and the three-section arm control reversing valve (13) are respectively used for controlling the independent extension of the two-section metal telescopic arm and the three-section insulating telescopic arm.

In one embodiment of the present application, there is also provided a work vehicle including: the telescopic boom control device is suitable for the comprehensive wire rod operating vehicle.

Through this application embodiment, different pressure values are set for respectively to first sequence valve and second sequence valve in the valve unit, and the order of control two, three section arms is flexible, at top platform department: a. the operation valve group of the operation platform controls the reversing valve to make an arm extending action through the telescopic arm, and pressure oil firstly enters a rodless cavity of the three-section arm telescopic cylinder to drive the three-section arm to extend outwards; when the stroke of the three-section arm telescopic cylinder extends to the head, the pressure is suppressed, when the pressure is increased to a set value of the first sequence valve, the first sequence valve is opened, and pressure oil enters the rodless cavity of the two-section arm telescopic cylinder after passing through the first sequence valve to drive the two-section arm to extend outwards. b. The operating valve group of the operating platform controls the reversing valve to do the action of arm contraction through the telescopic arm, pressure oil firstly enters a rod cavity of the telescopic cylinder with the two sections of arms and firstly drives the two sections of arms to retract; when the stroke of the two-section arm telescopic cylinder is contracted to the head, the pressure is suppressed, when the pressure rises to the pressure set value of the second sequence valve, the second sequence valve is opened, and pressure oil enters the rod cavity of the three-section arm telescopic cylinder after passing through the second sequence valve and then drives the three-section arm to retract. Namely, the action operation of the telescopic arm support at the top platform can realize the sequential telescopic action control of firstly extending the three-section arm, then extending the two-section arm, firstly retracting the two-section arm and then retracting the three-section arm.

In addition, the damping diameters of the first damping oil duct d1 and the second damping oil duct d2 in the control valve group are set to be proper, so that when the boom is operated to stretch at the top platform, oil passages from the outlet of the first shuttle valve and the outlet of the second shuttle valve can provide control pressure of the first hydraulic control one-way valve and the second hydraulic control one-way valve, the reverse oil passages of the first hydraulic control one-way valve and the second hydraulic control one-way valve are opened, and oil passages of the two-section boom telescopic cylinder and the three-section boom telescopic cylinder can flow back to an oil tank, so that the boom can stretch; and meanwhile, the pressure relief function of the control cavity oil way of the first hydraulic control one-way valve and the second hydraulic control one-way valve is respectively used after the telescopic action of the operating arm support at the top platform is stopped, so that the reverse oil ways of the first hydraulic control one-way valve and the second hydraulic control one-way valve are closed and stopped, and the reliable operation of the lower rotary table during the telescopic action of the two-section arm and the three-section arm can be ensured.

The pressure gauge can be used for respectively displaying different pressures during actions of the top side platform operation arm support and the lower side rotary table operation arm support, so that an operator can conveniently observe and control and conveniently troubleshoot faults when the abnormity occurs.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic diagram for showing a whole wire-pole comprehensive operation vehicle according to an embodiment of the invention;

fig. 2 is a diagram for illustrating a hydraulic control principle according to an embodiment of the present invention.

Reference numerals: 30. a control valve group; 40. a turntable operating valve group; 50. a platform operating valve block; 1. a first sequence valve; 2. a second sequence valve; 3-1, a first shuttle valve; 3-2, a second shuttle valve; 4-1, a first hydraulic control one-way valve; 4-2, a second hydraulic control one-way valve; 5-1, a first one-way valve, 5-2, a second one-way valve, 5-3, a third one-way valve, 5-4, a fourth one-way valve, 5-5, a fifth one-way valve, 5-6, a sixth one-way valve, 5-7, a seventh one-way valve, 5-8, an eighth one-way valve, 5-9 and a ninth one-way valve; 6-1, a first damping oil duct; 6-2, a second damping oil channel; 7. an oil tank; 8. an oil pump; 9. an overflow valve; 10. a pressure gauge; 11. a platform switching selector valve; 12. the two-section arm controls the reversing valve; 13. the three-section arm controls the reversing valve; 14. the telescopic arm controls the reversing valve; 15. a three-section arm telescopic cylinder; 16. a three-section arm balance valve; 17. a two-section arm telescopic cylinder; 18. a two-section arm balance valve; 19. a turntable; 20. and (5) drilling a rod.

Detailed Description

The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The embodiment of the application provides a telescopic boom control device suitable for a line pole comprehensive operation vehicle. FIG. 1 is a schematic diagram for showing a whole wire-pole comprehensive operation vehicle according to an embodiment of the invention; fig. 2 is a diagram for illustrating a hydraulic control principle according to an embodiment of the present invention. As shown in fig. 1 and 2, the control device includes:

the rotary table comprises a rotary table 19, three sections of insulating telescopic arms, two sections of metal telescopic arms, a three-section arm telescopic cylinder 15, a three-section arm balance valve 16, a two-section arm telescopic cylinder 17, a two-section arm balance valve 18, an oil pump 8 and an oil tank 7, wherein a rotary table control valve group 30 and a rotary table operation valve group 40 are arranged at the lower end of the rotary table 19, and a platform operation valve group 50 is arranged at the tops of the three sections of insulating telescopic arms and the two sections of metal telescopic arms;

the platform operation valve group 50 comprises a platform switching selection valve 11, a two-section arm control reversing valve 12 and a three-section arm control reversing valve 13, the platform operation valve group 50 is used for controlling the flow direction of oil output of the oil pump 8, the platform switching selection valve 11 is connected with the platform operation valve group 50 in series, the control valve group 30 comprises a first sequence valve 1 and a second sequence valve 2, the first sequence valve 1 and the second sequence valve 2 are respectively connected to two oil paths at the rear end of the platform operation valve group 50, the oil output end of the first sequence valve 1 is connected to a rodless cavity of the two-section arm telescopic cylinder 17, and the oil output end of the second sequence valve 2 is connected to a rod cavity of the three-section arm telescopic cylinder 15; the platform switching selection valve 11, the platform operation valve group 50, the first sequence valve 1 and the second sequence valve 2 are used for controlling sequential extension and retraction of the two sections of metal telescopic arms and the three sections of insulating telescopic arms; the two-section arm control reversing valve 12 and the three-section arm control reversing valve 13 are respectively used for controlling independent extension and retraction of the two-section metal telescopic arm and the three-section insulating telescopic arm.

In an alternative embodiment, a selector valve 11 for switching the operation of the turret/table is provided between the turret operation valve block 40 and the table operation valve block 50.

In an alternative embodiment, the platform operation valve set 50 includes a telescopic boom control directional control valve 14, and the first working port a and the second working port B of the telescopic boom control directional control valve 14 are respectively communicated with the T2R port and the T3E port of the control valve set 30 through pipelines.

In the control valve group 30, the oil port T2E and the oil port T3R of the valve block need to be plugged by plugs.

In an alternative embodiment, the rodless cavity of the three-jointed arm telescopic cylinder 15 communicates with the port C3E of the control valve group 30 through the three-jointed arm balance valve 16, and the rod cavity of the three-jointed arm telescopic cylinder 15 communicates with the port C3R of the control valve group 30 through the three-jointed arm balance valve 16; the rodless cavity of the two-section arm telescopic cylinder 17 is connected with a port C2E of the control valve group 30 through a two-section balance valve, and the rod cavity of the two-section arm telescopic cylinder 17 is communicated with a port C2R of the control valve group 30 through a two-section arm balance valve 18.

In an optional embodiment, the control valve group 30 includes a first damping oil passage 6-1, a second damping oil passage 6-2, a first shuttle valve 3-1, a second shuttle valve 3-2, a first pilot operated check valve 4-1, a second pilot operated check valve 4-2, a first check valve 5-1, a second check valve 5-2, a third check valve 5-3, a fourth check valve 5-4, a fifth check valve 5-5, a sixth check valve 5-6, a seventh check valve 5-7, an eighth check valve 5-8, and a ninth check valve 5-9;

the outlet c1 of the first shuttle valve 3-1 is communicated with the control port k1 of the first pilot-controlled check valve 4-1, and the outlet c2 of the second shuttle valve 3-2 is communicated with the control port k2 of the second pilot-controlled check valve 4-2;

an inlet of the first sequence valve 1 is communicated with an oil port T3E, an oil inlet a1 at one side of the first shuttle valve 3-1 and an inlet of the first check valve 5-1 through oil passages on the valve block, and an outlet of the first sequence valve 1 is communicated with an oil port T2E, an oil inlet b1 at the other side of the first shuttle valve 3-1 and an inlet of the third check valve 5-3 through oil passages on the valve block; an inlet of the second sequence valve 2 is communicated with an oil port T2R, an oil inlet b2 at one side of the second shuttle valve 3-2 and an inlet of the fourth check valve 5-4 through oil passages on the valve block, an outlet of the second sequence valve 2 is communicated with an oil port T3R, an oil inlet a2 at the other side of the second shuttle valve 3-2 and an inlet of the second check valve 5-2 through oil passages on the valve block, oil drainage of spring cavities of the first sequence valve 1 and the second sequence valve 2 is communicated with an inlet of the ninth check valve 5-9, a damping oil passage of an outlet c1 of the first shuttle valve 3-1 and a damping oil passage of an outlet c2 of the second shuttle valve 3-2 through oil passages on the valve block, and an outlet of the ninth check valve 5-9 is connected with the oil tank 7.

It should be noted that: an outlet of the first check valve 5-1 is communicated with an inlet of the fifth check valve 5-5, an oil port of the valve block 3E and an oil port of the valve block C3E through oil passages in the valve block; an outlet of the second check valve 5-2 is communicated with an inlet of the sixth check valve 5-6, an oil port of the valve block 3R and an oil port of the valve block C3R through oil passages in the valve block; an outlet of the third check valve 5-3 is communicated with an inlet of the seventh check valve 5-7, an oil port of the valve block 2E and an oil port of the valve block C2E through oil passages in the valve block; the outlet of the fourth check valve 5-4 is communicated with the inlet of the eighth check valve 5-8, the oil port of the valve block 2R and the oil port C2R through the oil passage inside the valve block. An outlet of the fifth check valve 5-5 and an outlet of the seventh check valve 5-7 are communicated with a reverse working oil port f2 of the second hydraulic control check valve 4-2 through an oil passage on the valve block, and an outlet of the sixth check valve 5-6 and an outlet of the eighth check valve 5-8 are communicated with a reverse working oil port of the first hydraulic control check valve 4-1 through an oil passage of the valve block; the forward working oil port e1 of the first hydraulic control one-way valve 4-1 and the forward working oil port f1 of the second hydraulic control one-way valve 4-2 are communicated with the oil tank 7 after being communicated through oil passages on the valve block.

In an alternative embodiment, the first working oil port a1 of the first platform switching selection valve 11 of the turntable operation valve group 40 is communicated with the oil return T port of the platform operation valve group 50 through a pipeline, and the second working oil port B1 of the platform switching selection valve 11 is communicated with the oil inlet P port of the platform operation valve group 50 through a pipeline; the first working oil port A2 and the second working oil port B2 of the second joint second arm control reversing valve 12 of the turntable operation valve group 40 are respectively communicated with the port 2R and the port 2E of the control valve group 30 through pipelines; the first working oil port a3 and the second working oil port B3 of the third link arm control reversing valve 13 of the turntable operation valve group 40 are respectively communicated with the 3R port and the 3E port of the turntable control valve group 30 through pipelines.

In an alternative embodiment, the turret and platform valve blocks 40 and 50 are manual reversing multiple valve blocks.

It should be noted that the triple directional valves of the turntable operation valve group 40 are all manual directional multi-way valves with O-type neutral function, and the telescopic control directional valve of the platform operation valve group 50 is also a manual directional multi-way valve with O-type neutral function.

In an alternative embodiment, a pressure gauge 10 is included, and an inlet of the pressure gauge 10 is communicated with an outlet of the oil pump 8 and an inlet of the turntable operation valve group 40.

It should be noted that an overflow valve 9 for controlling pressure is further arranged in the oil path, an outlet of the oil pump 8 and an inlet of the overflow valve 9 are both communicated with an inlet of the turntable operation valve group 40 through a pipeline, and an oil inlet of the oil pump 8 and an oil return port of the overflow valve 9 are both communicated with an oil return port of the turntable operation valve group 40 and the oil tank 7 through a pipeline. The inlet of the pressure gauge 10 is communicated with the outlet of the oil pump 8, the inlet of the overflow valve 9 and the inlet of the turntable operation valve group 40.

Through the embodiment of the application, the invention can be realized at the top platform: the telescopic arm support is controlled by sequential telescopic action, namely three sections of insulating telescopic arms are firstly extended/two sections of metal telescopic arms are then extended, and two sections of metal telescopic arms are firstly contracted/three sections of insulating telescopic arms are then contracted; at the lower turntable 19 are realized: the two sections of metal telescopic arms and the three sections of insulating telescopic arms are controlled by independent telescopic actions, no valve group is arranged in each of the metal telescopic arms and the insulating telescopic arms, no electric control element is arranged, the two telescopic arm telescopic cylinders adopt a conventional technology and adopt very reliable full hydraulic control operation, so that the wire rod comprehensive operation vehicle can respectively carry out different operation control on the telescopic arm frames according to different multifunctional operation working conditions of the wire rod comprehensive operation vehicle, and the wire rod comprehensive operation vehicle has the advantages of low failure rate, high operation efficiency, safe operation and reliable control.

According to another aspect of an embodiment of the present application, there is also provided a work vehicle including: the telescopic boom control device is suitable for the comprehensive line pole operating vehicle.

Through the above description of the embodiments, two kinds of control of the present embodiment are as follows: the telescopic arm support is controlled by sequential telescopic action, namely three sections of insulating telescopic arms are firstly extended/two sections of metal telescopic arms are then extended, and two sections of metal telescopic arms are firstly contracted/three sections of insulating telescopic arms are then contracted; at the lower turntable 19 are realized: the action control of the two sections of metal telescopic arms and the three sections of insulating telescopic arms, namely 'independent telescopic' action, now describes the trend of two specific oil paths with different control operations as follows, and the detailed description is shown in the attached figure 2:

operating an arm extending action at the platform: the first platform switching selector valve 11 of the turntable operation valve group 40 is switched to the lower side position, and the platform operation valve group 50 telescopically controls the reversing valve 14 to be switched to the upper side position, namely:

1) the pressure oil path enters the oil path of the rodless cavity of the three-section arm telescopic cylinder 15 in the following direction: P0-B1-P-B-T3E-5-1-C3E-V31-C31, the trend of the oil return circuit of the rod cavity of the three-section arm telescopic cylinder 15 is as follows: C32-V32-C3R-D-5-6-H-e 2-e 1-J-T;

2) the stroke of the three-section arm telescopic cylinder 15 extends to the head, the first sequence valve 1 is opened, and the pressure oil enters the oil path trend of the rodless cavity of the two-section arm telescopic cylinder 17 through the first sequence valve 1: P0-B1-P-B-T3E-1-5-3-E-C2E-V21-C21, the trend of an oil return path of a rod cavity of the two-section arm telescopic cylinder 17 is as follows: C22-V22-C2R-F-5-8-H-e 2-e 1-J-T;

operating arm retracting action at the platform: the first platform of revolving stage operating valve group 40 switches selector valve 11 and commutates to the downside position, and platform operating valve group 50 flexible control switching-over valve commutates to the downside position, promptly:

3) the direction of the oil path of the pressure oil path entering the rod cavity of the two-section arm telescopic cylinder 17 is as follows: P0-B1-P-A-T2R-5-4-F-C2R-V22-C22, the trend of the oil return circuit of the rodless cavity of the two-section arm telescopic cylinder 17 is as follows: C21-V21-C2E-E-5-7-G-f 2-f 1-J-T;

4) the 17 strokes of two-section arm telescopic cylinder contract to the head, and second sequence valve 2 opens, and pressure oil reenters the oil circuit trend that three-section arm telescopic cylinder 15 has the pole chamber through second sequence valve 2 and does: P0-B1-P-A-T2R-2-5-2-D-C3R-V32-C32, the trend of the oil return path of the rodless cavity of the three-section arm telescopic cylinder 15 is as follows: C31-V31-C3E-C-5-G-f 2-f 1-J-T;

two sections of arm 'arm stretching' action is independently operated at the position of the rotary table 19: the first platform switching selection valve 11 of the turntable operation valve group 40 is switched to the middle position, and the second joint second-joint arm controls the reversing valve 12 to be switched to the upper position, namely:

5) the direction of the oil path of the pressure oil path entering the rodless cavity of the two-section arm telescopic cylinder 17 is as follows: P0-B2-2E-C2E-V21-C21, the trend of the oil return path of the rod cavity of the two-section arm telescopic cylinder 17 is as follows: C22-V22-C2R-F-2R-A2-T0;

the two-section arm 'arm-retracting' action is independently operated at the position of the rotary table 19: the first platform switching selection valve 11 of the turntable operation valve group 40 is switched to the middle position, and the second joint second-joint arm control switching valve 12 is switched to the lower side position, that is:

6) the direction of the oil path of the pressure oil path entering the rod cavity of the two-section arm telescopic cylinder 17 is as follows: P0-A2-2R-F-C2R-V22-C22, the trend of the oil return path of the rodless cavity of the two-section arm telescopic cylinder 17 is as follows: C21-V21-C2E-E-2E-B2-T0;

three sections of arm 'arm stretching' action is independently operated at the position of the rotary table 19: the first platform switching selection valve 11 of the turntable operation valve group 40 is switched to the middle position, and the third link arm controls the reversing valve 13 to be switched to the upper position, namely:

7) the pressure oil path enters the oil path of the rodless cavity of the three-section arm telescopic cylinder 15 in the following direction: P0-B3-3E-C3E-V31-C31, the trend of the oil return path of the rod cavity of the three-section arm telescopic cylinder 15 is as follows: C32-V32-C3R-D-3R-A3-T0;

three-section arm 'arm retracting' action is independently operated at the position of the rotary table 19: the first platform switching selection valve 11 of the turntable operation valve group 40 is switched to the middle position, and the third link arm controls the reversing valve 13 to be switched to the lower side position, namely:

8) the pressure oil path enters the oil path of the rod cavity of the three-section arm telescopic cylinder 15 in the following direction: P0-A3-3R-D-C3R-V32-C32, the trend of the oil return path of the rodless cavity of the three-section arm telescopic cylinder 15 is as follows: C31-V31-C3E-C-3E-B3-T0.

The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.