阅读说明：本技术 伸缩机构液压控制系统及其应用的起重设备 (Telescopic mechanism hydraulic control system and hoisting equipment applying same ) 是由 李钦河 刘东海 于 2020-08-20 设计创作，主要内容包括：本发明公开了一种伸缩机构液压控制系统及其应用的起重设备,包括同步伸缩油缸组和顺序伸缩油缸；同步伸缩油缸组中,包括至少两组同步伸缩动作的同步伸缩油缸,所有同步伸缩油缸中的同一油腔以及顺序伸缩油缸对应的油腔相互连通并通过第一油路连接至系统换向阀的其中一个工作油口,所有同步伸缩油缸的另一油腔以及顺序伸缩油缸对应的油腔分别通过第二油路连接至系统换向阀的另一个工作油口,同步伸缩油缸的第二油路和顺序伸缩油缸的第二油路通过伸缩顺序换向阀汇接至系统换向阀,所有同步伸缩油缸至伸缩顺序换向阀的第二油路上设有同步阀。本发明实现了起重设备伸缩臂带载伸缩工作的可能,提高了设备工作的稳定性和应用范围。(The invention discloses a hydraulic control system of a telescopic mechanism and hoisting equipment applied by the same, wherein the hydraulic control system comprises a synchronous telescopic oil cylinder group and a sequential telescopic oil cylinder; the synchronous telescopic oil cylinder group comprises at least two groups of synchronous telescopic oil cylinders which synchronously perform telescopic action, wherein the same oil cavity in all the synchronous telescopic oil cylinders and the oil cavity corresponding to the sequential telescopic oil cylinder are communicated with each other and are connected to one working oil port of the system reversing valve through a first oil path, the other oil cavity of all the synchronous telescopic oil cylinders and the oil cavity corresponding to the sequential telescopic oil cylinder are respectively connected to the other working oil port of the system reversing valve through a second oil path, the second oil path of the synchronous telescopic oil cylinder and the second oil path of the sequential telescopic oil cylinder are connected to the system reversing valve through a telescopic sequential reversing valve in a tandem manner, and the synchronous valves are arranged on the second oil paths from all the synchronous telescopic oil cylinders to the telescopic sequential reversing. The invention realizes the possibility of the telescopic operation of the telescopic arm of the hoisting equipment in a loading way, and improves the stability and the application range of the operation of the equipment.)

1. Telescopic machanism hydraulic control system, its characterized in that: comprises a synchronous telescopic oil cylinder group and a sequential telescopic oil cylinder;

the synchronous telescopic oil cylinder group comprises at least two groups of synchronous telescopic oil cylinders which synchronously perform telescopic action,

the same oil cavity in all the synchronous telescopic oil cylinders and the oil cavity corresponding to the sequential telescopic oil cylinder are communicated with each other and are connected to one of the working oil ports of the system reversing valve through a first oil way,

and the other oil cavities of all the synchronous telescopic oil cylinders and the oil cavities corresponding to the sequential telescopic oil cylinders are respectively connected to the other working oil ports of the system reversing valve through second oil paths, the second oil paths of the synchronous telescopic oil cylinders and the second oil paths of the sequential telescopic oil cylinders are connected to the system reversing valve through a telescopic sequential reversing valve in a tandem manner, and the second oil paths from all the synchronous telescopic oil cylinders to the telescopic sequential reversing valve are provided with synchronous valves.

2. The hydraulic control system of a telescopic mechanism according to claim 1, wherein the synchronous valve comprises a plurality of pressure passages which are respectively butted with the second oil passages of the synchronous telescopic cylinders, the pressure passages are communicated in a bypass mode through a shuttle valve, and each pressure passage is connected with a return oil bypass of a return oil tank through a two-way cartridge valve.

3. The hydraulic control system of a telescoping mechanism of claim 2, wherein the two-way cartridge valve is controlled by a reversing valve which is connected by a return oil bypass, the reversing valve is a two-position electric control reversing valve with a stop position, and the reversing valve is in feedback connection with an in-position travel switch of the synchronous telescoping oil cylinder.

4. The telescoping mechanism hydraulic control system of claim 4, the control oil path of the reversing valve being flanked by an overflow valve.

5. The telescopic mechanism hydraulic control system according to claim 2, wherein the pressure passage of the synchronizing valve is provided with a one-way throttle valve.

6. The hydraulic control system of a telescoping mechanism according to any of claims 1-5, wherein the second oil paths of all the synchronous telescoping cylinders are distributed by providing a split motor, and the split motor is provided at the oil inlet end of the synchronous valve.

7. The telescoping mechanism hydraulic control system of claim 1, the synchronous telescoping cylinder and sequential telescoping cylinder each having a balancing valve.

8. The telescoping mechanism hydraulic control system of claim 1, the telescoping sequence selector valve being a hydraulically controlled selector valve.

9. Hoisting equipment, its characterized in that: the telescopic arm mechanism comprising the hydraulic control system of telescopic mechanism as claimed in claims 1-8, wherein each movable telescopic arm is installed in one-to-one correspondence with a telescopic cylinder in the hydraulic control system of telescopic mechanism.

10. The hoisting device of claim 9, which is a telescopic arm crawler crane.

Technical Field

The invention relates to a hydraulic telescopic mechanism and application thereof, in particular to a telescopic mechanism hydraulic control system and equipment thereof.

Background

The telescopic mechanism of the telescopic boom crawler crane comprises a single-cylinder rope row telescopic mechanism, a multi-cylinder rope row telescopic mechanism and a single-cylinder bolt telescopic mechanism, the telescopic mechanisms can meet the hoisting operation requirements of users during hoisting, but have a common defect that the telescopic boom is not allowed to be stretched under the condition of hoisting and carrying heavy objects, so that the construction working condition of the telescopic boom crawler crane is limited. When the multifunctional telescopic boom crawler crane is used for down-the-hole hammer operation, the multifunctional telescopic boom crawler crane needs to adapt to construction sites in high slopes, deep grooves and narrow zones, and has the loaded telescopic capacity, which is also significant for general hoisting operation.

For example, in the six-section jib telescopic mechanism of the automobile crane disclosed in the chinese patent application with the application number CN201921430403.4, the telescopic mechanism adopts a mode of an oil cylinder and a steel wire rope pulley, when the rotary drilling rig or the down-the-hole hammer is hoisted by the telescopic mechanism with the structure, the telescopic state is kept by the steel wire rope due to the telescopic force, and the telescopic action of the telescopic arm in a loading manner cannot be controlled due to the large elasticity of the steel wire rope; especially in the drilling construction process of the drill rod, the hoisting steel wire rope telescopic mechanism has large elasticity and low precision of the steel wire rope, when the hoisting steel wire rope is impacted and vibrated, a working device additionally arranged on the suspension arm is easy to displace, and the telescopic mechanism is easy to break, so that the operation quality can not be ensured. Therefore, the traditional telescopic arm mechanism of the oil cylinder and the steel wire rope pulley cannot carry a down-the-hole hammer and an auger to carry out construction operation.

Disclosure of Invention

The technical problem solved by the invention is as follows: aiming at the problem that the existing lifting telescopic mechanism of the oil cylinder and the steel wire rope pulley cannot realize on-load operation, the hydraulic control system of the telescopic mechanism adopting the multi-stage oil cylinder and the lifting equipment applying the hydraulic control system are provided.

The invention is realized by adopting the following technical scheme:

the hydraulic control system of the telescopic mechanism comprises a synchronous telescopic oil cylinder group and a sequential telescopic oil cylinder; the synchronous telescopic oil cylinder group comprises at least two groups of synchronous telescopic oil cylinders which synchronously perform telescopic actions, wherein the same oil cavity in all the synchronous telescopic oil cylinders and the oil cavity corresponding to the sequential telescopic oil cylinder are communicated with each other and are connected to one of the working oil ports of the system reversing valve through a first oil path, the other oil cavity of all the synchronous telescopic oil cylinders and the oil cavity corresponding to the sequential telescopic oil cylinder are respectively connected to the other working oil port of the system reversing valve through a second oil path, the second oil path of the synchronous telescopic oil cylinder and the second oil path of the sequential telescopic oil cylinder are connected to the system reversing valve through a telescopic sequential reversing valve in a tandem manner, and the synchronous valves are arranged on the second oil paths from all the synchronous telescopic oil cylinders to the telescopic sequential reversing valve, so that the synchronous telescopic oil cylinders of the synchronous telescopic oil cylinder group perform synchronous telescopic actions, and the sequential telescopic oil cylinders.

In the hydraulic control system of the telescopic mechanism in the above scheme, further, the inside of the synchronizing valve includes a plurality of pressure passages respectively butted with the second oil passages of the synchronous telescopic cylinders, the pressure passages are communicated by the shuttle valve, and each pressure passage is connected with an oil return bypass of the return oil tank through a two-way cartridge valve.

In the hydraulic control system of the telescopic mechanism in the above scheme, further, the two-way cartridge valve is controlled by a reversing valve which is connected by the oil return bypass, the reversing valve is a two-position electric control reversing valve with a stop position, and the reversing valve is in feedback connection with an in-place travel switch of the synchronous telescopic cylinder.

In the hydraulic control system of the telescopic mechanism in the above scheme, further, an overflow valve is connected beside a control oil path of the reversing valve.

In the hydraulic control system of the telescopic mechanism in the above scheme, further, a pressure passage of the synchronizing valve is provided with a one-way throttle valve.

In the hydraulic control system of the telescopic mechanism, the second oil paths of all the synchronous telescopic oil cylinders are distributed by arranging the shunt motors, the shunt motors are arranged at the oil inlet ends of the synchronous valves, and the flow of hydraulic oil pumped to the synchronous telescopic oil cylinders is uniformly distributed by the shunt motors.

In the hydraulic control system of the telescopic mechanism in the above scheme, further, the synchronous telescopic cylinder and the sequential telescopic cylinder are both provided with a balance valve.

In the hydraulic control system of the telescopic mechanism in the above scheme, further, the telescopic sequence reversing valve is a hydraulic control reversing valve.

The invention also discloses hoisting equipment which comprises a telescopic arm mechanism adopting the hydraulic control system of the telescopic mechanism, wherein the telescopic arm mechanism at least comprises three sections of movable telescopic arms, and each movable telescopic arm is correspondingly arranged with the telescopic oil cylinders in the hydraulic control system of the telescopic mechanism one by one.

In the hoisting device according to the above aspect, preferably, the hoisting device is a telescopic boom crawler crane.

The telescopic mechanism hydraulic control system provided by the invention adopts multiple groups of telescopic oil cylinders to control the telescopic action of the telescopic mechanism, utilizes the multiple groups of synchronous telescopic oil cylinders of the synchronous telescopic oil cylinder group to synchronously telescope and combines the sequential telescopic action of the sequential telescopic oil cylinders, so that the telescopic action speed of the telescopic mechanism is improved, the telescopic control is more accurate, the telescopic work efficiency of the telescopic mechanism is ensured, the problem that the traditional crane telescopic mechanism oil cylinder and steel wire rope mechanism cannot carry to telescope is solved, and the problems that the traditional crane steel wire rope telescopic mechanism is high in elasticity and low in precision are further solved. The multifunctional crawler crane using the telescopic mechanism hydraulic control system can realize that the telescopic boom mechanism carries the down-the-hole hammer and the spiral drill to carry out pile foundation construction operation, reduce the vibration of the telescopic boom in the telescopic working process, avoid the damage of the telescopic mechanism, ensure the operation quality, enlarge the working range of the crawler crane, meet the operation requirements and reduce the labor cost.

In conclusion, the telescopic mechanism hydraulic control system and the hoisting equipment applied by the telescopic mechanism hydraulic control system realize the possibility of telescopic arm carrying telescopic work, and improve the working stability and application range of the equipment.

The invention is further described with reference to the following figures and detailed description.

Drawings

Fig. 1 is a hydraulic schematic diagram of a hydraulic control system of a telescopic mechanism in an embodiment.

Reference numbers in the figures: 1-a first telescopic oil cylinder, 2-a second telescopic oil cylinder, 3-a third telescopic oil cylinder, 4-a first balance valve, 5-a second balance valve, 6-a third balance valve, 7-a first hose reel, 8-a second hose reel, 9-a synchronous valve, 9.1-a one-way throttle valve, 9.2-a shuttle valve, 9.3-a first two-way cartridge valve, 9.4-a second two-way cartridge valve, 9.5-an overflow valve, 9.6-a first reversing valve, 9.7-a second reversing valve, 10-a shunt motor, 11-a telescopic sequence reversing valve, 11.1-a hydraulic control reversing valve, 11.2-a hydraulic control pilot valve, 11.3-an overflow valve, 11.4-a pilot pump and 12-a system reversing valve.

Detailed Description