CN113135513A

CN113135513A - Rotation combined control valve, crane rotation control system and control method

Info

Publication number: CN113135513A
Application number: CN202110565445.4A
Authority: CN
Inventors: 姜洪; 王震山; 张夕航; 陈钊汶; 唐红彩; 祝天昊; 李贺
Original assignee: Shanghai Shengbang Hydraulic Co ltd; Xuzhou Shengbang Machinery Co Ltd; Zhejiang Sunbun Technology Co Ltd; Sunbun Group Co Ltd
Current assignee: Shanghai Shengbang Hydraulic Co ltd; Xuzhou Shengbang Machinery Co Ltd; Zhejiang Sunbun Technology Co Ltd; Sunbun Group Co Ltd
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2021-07-20

Abstract

A rotation combination control valve, a crane rotation control system and a control method are provided. The problem of current crawler crane do not possess the free gyration function is solved. The hydraulic control valve comprises a first interface, a second interface, a third interface and a fourth interface, wherein the first interface and the second interface are provided with first reversing valves, a second reversing valve is arranged between the third interface and the fourth interface, a throttle valve and a third reversing valve are arranged between the first interface and the third interface, and the third reversing valve is provided with a first position enabling the first interface and the third interface to be communicated and a second position for cutting off an oil path between the first interface and the third interface. The invention has the advantages that the free slip function of the crawler crane is realized, the free slip speed can be steplessly adjusted through the throttle valve, the hydraulic system is simplified, the connection pipeline is simplified due to the integrated design, and the energy consumption of auxiliary action is reduced due to the selection of the reversing valve.

Description

Rotation combined control valve, crane rotation control system and control method

Technical Field

The invention relates to a crane, in particular to a rotation combined control valve, a crane rotation control system and a crane rotation control method.

Background

The crane refers to a multi-action crane for vertically lifting and horizontally carrying heavy objects within a certain range. Also known as crown blocks, navigation cranes and cranes. The crawler crane is a mobile crane which is provided with a hoisting operation part on a crawler chassis and runs by a crawler device. Belongs to material handling machinery. For the ultra-kiloton crawler crane, most actions are realized by driving an oil cylinder or a motor through a hydraulic system, for example, the rotary action is realized by forming a closed rotary hydraulic system by a closed pump and the motor. As a super kiloton crawler crane, the stability and reliability of the rotation action are very important to the safety of hoisting. Under the condition that the existing crane boom is dragged by an object to be hoisted, a boom rotates along with traction force. Existing closed systems for cranes include a closed pump and a swing motor, which, while performing a normal swing function, do not provide a free swing function. When hoist and mount heavy object and abnormal shape thing promptly, the focus is difficult to judge, and the jib loading boom is difficult to on same straight line with by hoist and mount thing focus for the jib loading boom receives side direction load's influence, makes product security performance lower, and kiloton level hoist moreover needs control auxiliary motion more, needs a plurality of pumps to realize, makes the product oil circuit arrange the difficulty, and the cost increases.

Disclosure of Invention

The invention provides a rotation combined control valve, a crane rotation control system and a control method, which aim to solve the problem that the existing crawler crane in the background art does not have a free rotation function.

The technical scheme of the invention is as follows: a rotary combined control valve comprises a first interface, a second interface, a third interface and a fourth interface, wherein a first reversing valve is arranged on the first interface and the second interface, a second reversing valve is arranged between the third interface and the fourth interface, a throttle valve and a third reversing valve are arranged between the first interface and the third interface, and the third reversing valve is provided with a first position enabling the first interface and the third interface to be communicated and a second position for cutting off an oil path between the first interface and the third interface.

As a further improvement of the invention, the throttle valve is a throttle valve with a variable throttle.

As a further improvement of the invention, the first reversing valve is provided with a first position for communicating the first interface and the second interface and a second position for cutting off an oil path between the first interface and the second interface.

As a further improvement of the invention, the second reversing valve is provided with a first position for communicating the third interface and the fourth interface and a second position for cutting off an oil path between the third interface and the fourth interface.

As a further improvement of the invention, the first reversing valve, the second reversing valve and the third reversing valve are all two-position two-way reversing valves.

As a further improvement of the invention, the first reversing valve, the second reversing valve and the third reversing valve are all electromagnetic reversing valves.

The rotary control system of the crane comprises a closed pump, a rotary motor, an auxiliary motor and the rotary combined control valve, wherein a first oil way and a second oil way are connected to the closed pump, the rotary motor is arranged between the first oil way and the second oil way, and the first oil way and the rotary motor form a loop through the rotary combined control valve and the second oil way.

As a further improvement of the invention, the first oil path is connected with the rotary motor through a first interface, a throttle valve, a third reversing valve, a third interface and a second oil path.

As a further improvement of the invention, the first oil path forms a loop with the closed pump through a first port, a first reversing valve, a second port, an auxiliary motor, a fourth port, a second reversing valve, a third port, a second oil path and the closed pump.

A rotation control method of a crane comprises a closed pump, a rotation motor, an auxiliary motor and the rotation combined control valve,

normal rotation working condition: when the crawler crane does normal rotation action, the first reversing valve, the second reversing valve and the third reversing valve are not electrified, the output flow and the direction of the closed pump are controlled through a current signal output by the operating handle of the main machine, and the rotation speed reducer is driven by the rotation motor to realize the rotation action of the main machine;

free rotation working condition: when the free slip function is needed, the first reversing valve and the second reversing valve are not electrified, the third reversing valve is electrified, the first interface and the third interface are communicated with each other through the throttle valve and the third reversing valve, the two ends of the rotary motor are communicated with each other at the moment, a brake of the rotary motor is opened through an external oil way, the free slip function can be realized, and the free slip speed can be adjusted through the regulating valve;

the working condition of the auxiliary motor is as follows: and the third reversing valve is not electrified, the first reversing valve and the second reversing valve are electrified, the brake of the rotary motor is in a locking state, the brake of the auxiliary motor is in an opening state, and at the moment, the closed pump and the auxiliary motor form an auxiliary action closed loop through the first reversing valve, the second reversing valve and the auxiliary motor.

The invention has the advantages that the free slip function of the crawler crane is realized, the free slip speed can be steplessly adjusted through the throttle valve, the hydraulic system is simplified, the connection pipeline is simplified due to the integrated design, and the energy consumption of auxiliary action is reduced due to the selection of the reversing valve. The invention also has the advantages of simple structure, convenient assembly, reliable action, long service life and the like.

Drawings

FIG. 1 is a hydraulic schematic of an embodiment of the present invention.

Fig. 2 is a hydraulic schematic diagram of the rotary combination control valve of fig. 1.

In the figure, 1, a closed pump; 2. a rotary motor; 3. an auxiliary motor; 4. a rotary combination control valve; 5. a first direction changing valve; 6. a second directional control valve; 7. a throttle valve; 8. a third directional control valve; 9. a first oil passage; 10. a second oil passage; a1, a first interface; a2, a second interface; b1, a third interface; b2, fourth interface.

Detailed Description

The embodiments of the invention will be further described with reference to the accompanying drawings in which:

referring to fig. 1 and fig. 2, a rotary combined control valve includes a first port a1, a second port a2, a third port B1, and a fourth port B2, the first port and the second port are provided with a first direction valve 5, a second direction valve 6 is provided between the third port and the fourth port, a throttle valve 7 and a third direction valve 8 are provided between the first port and the third port, and the third direction valve has a first position at which the first port and the third port are communicated and a second position at which an oil path between the first port and the third port is blocked. The invention has the advantages that the free slip function of the super kiloton crawler crane is realized, and the free slip speed can be steplessly adjusted through the throttle valve. Specifically, the high-flow electromagnetic reversing valve is selected, and the high-flow electromagnetic valve reduces the energy consumption of auxiliary actions. The invention also has the advantages of simple structure, convenient assembly, reliable action, long service life and the like.

The throttle valve is a throttle valve with a variable throttle opening. The structure can realize the stepless regulation function through the throttle valve, and is convenient for controlling the rotating speed of the rotary motor under the free rotation working condition.

The first reversing valve is provided with a first position enabling the first connector and the second connector to be communicated and a second position cutting off an oil path between the first connector and the second connector. Specifically, the second reversing valve is provided with a first position enabling the third interface and the fourth interface to be communicated and a second position blocking an oil path between the third interface and the fourth interface. Specifically, the first reversing valve, the second reversing valve and the third reversing valve are two-position two-way reversing valves. More specifically, the first reversing valve, the second reversing valve and the third reversing valve are all electromagnetic reversing valves. The structure is convenient for rapidly and reliably controlling the on-off of the first interface and the second interface, the on-off of the third interface and the fourth interface and the on-off of the first interface and the third interface, the rotation control of the rotation system is convenient to realize, the rotation system has the functions of normal rotation, free rotation and the like, the stability and the reliability of the rotation action are improved, and the lifting safety is improved.

The utility model provides a hoist gyration control system, includes closed pump 1, gyration motor 2, auxiliary motor 3 and gyration combination control valve 4, closed pump on be connected with first oil circuit 9 and second oil circuit 10, the gyration motor locate between first oil circuit and the second oil circuit, first oil circuit constitute the return circuit through gyration combination control valve, second oil circuit and gyration motor. The invention realizes the multi-purpose function of the closed pump, reduces the production cost of the hydraulic system, simplifies the hydraulic system, and simplifies the connecting pipeline by the integrated design. Meanwhile, two ends of the rotary motor can be communicated when needed, and the crane boom can rotate freely only by controlling the brake of the rotary motor to be opened, so that the crane boom and the center of gravity of the hoisted object are on the same straight line, and the crane boom is prevented from being subjected to side load.

The first oil path is connected with the second oil path rotary motor through a first connector, a throttle valve, a third reversing valve, a third connector and a second oil path. Specifically, the first oil path forms a loop with the closed pump through the first connector, the first reversing valve, the second connector, the auxiliary motor, the fourth connector, the second reversing valve, the third connector and the second oil path. The structure can reliably control the actions of the rotary motor and the auxiliary motor, realizes the multi-purpose function of the closed pump by one pump, reduces the production cost of a hydraulic system, simplifies the hydraulic system, simplifies a connecting pipeline by integrated design, needs more control auxiliary actions at kiloton level, and has multiple purposes of one pump, thereby being an effective scheme for saving cost.

A crane rotation control method comprises a closed pump 1, a rotation motor 2, an auxiliary motor 3 and a rotation combined control valve 4,

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the invention has been described in terms of the above specific embodiments, the inventive concept is not limited thereto and any modification applying the inventive concept is intended to be included within the scope of the patent claims.

Claims

1. A rotary combined control valve is characterized by comprising a first connector, a second connector, a third connector and a fourth connector, wherein a first reversing valve is arranged on the first connector and the second connector, a second reversing valve is arranged between the third connector and the fourth connector, a throttle valve and a third reversing valve are arranged between the first connector and the third connector, and the third reversing valve is provided with a first position enabling the first connector and the third connector to be communicated and a second position blocking an oil path between the first connector and the third connector.

2. The swing combination control valve according to claim 1, wherein the throttle valve is a variable-orifice throttle valve.

3. The rotary combination control valve as defined in claim 1, wherein the first direction valve has a first position at which the first port and the second port are communicated with each other and a second position at which the oil passage between the first port and the second port is blocked.

4. The swing combination control valve according to claim 1, wherein the second direction valve has a first position where the third port and the fourth port are communicated with each other and a second position where the oil passage between the third port and the fourth port is blocked.

5. The swing combination control valve according to claim 1, wherein the first direction valve, the second direction valve, and the third direction valve are two-position, two-way direction valves.

6. The swing combination control valve according to claim 1, wherein the first direction valve, the second direction valve, and the third direction valve are all electromagnetic direction valves.

7. A crane rotation control system is characterized in that: the rotary combined control valve comprises a closed pump, a rotary motor, an auxiliary motor and the rotary combined control valve according to any one of claims 1 to 6, wherein the closed pump is connected with a first oil path and a second oil path, the rotary motor is arranged between the first oil path and the second oil path, and the first oil path and the rotary motor form a loop through the rotary combined control valve and the second oil path.

8. The crane rotation control system as claimed in claim 7, wherein the first oil path is connected to the second oil path rotation motor through a first port, a throttle valve, a third reversing valve, a third port and a second oil path.

9. The crane rotation control system according to claim 7, wherein the first oil path forms a loop with the closed pump through the first port, the first reversing valve, the second port, the auxiliary motor, the fourth port, the second reversing valve, the third port, the second oil path.

10. A crane rotation control method is characterized in that: comprising a closed pump, a rotary motor, an auxiliary motor and a rotary combined control valve according to any one of claims 1-6,