WO2011060639A1 - Switching control device for cylinders of crane boom - Google Patents

Abstract

A switching control device for cylinders of a crane boom comprises a first oil cylinder (1), a second oil cylinder (2) and a main reversing valve (3). The small cavity of the first oil cylinder (1) communicates with the small cavity of the second oil cylinder (2) each other. The port A of the main reversing valve (3) is connected to the small cavity of the first oil cylinder (1). The port B of the main reversing valve (3) is connected respectively with the big cavities of the first oil cylinder (1) and the second oil cylinder (2). The control device realizes switching control for two oil cylinders of a crane boom. Therefore, it is ensured that the oil cylinders are safe and controllable during the crane boom operation process or the whole vehicle running process.

Description

 The utility model relates to a crane arm cylinder switching control device. The application is submitted to the Chinese Patent Office on November 20, 2009, and the application number is 200920270403.2. The utility model name is "a boom arm cylinder switching control device". The entire contents of which are incorporated herein by reference. Technical field

 The utility model relates to the field of machinery, in particular to a boom cylinder switching control device. Background technique

 With the increasing demand for truck cranes, the level of design and manufacture of truck cranes is also gradually increasing. Among them, the control design of the boom is an important and critical part in the design of truck cranes. The telescopic expansion of the truck crane boom is generally accomplished by the expansion and contraction of the cylinder. For small and medium-sized p-station truck cranes, the extension of the 5-arm cylinder is usually achieved by combining the two cylinders with the rope row. The control of the truck crane boom cylinder is the guarantee of the safety and reliability of the truck crane during the work and transportation. During the work of the truck crane, the control of the boom cylinder ensures the safety within the working range of the boom. During the whole process of the truck crane driving, the control of the boom cylinder ensures the safety and reliability of the boom in emergency situations such as sudden braking.

In the prior art, the control of the boom cylinder is controlled by two Y-type intermediate function main reversing valves, respectively, as shown in Fig. 1 is the hydraulic pressure of the boom cylinder control device in the prior art. Schematic. By using the prior art boom cylinder control device, when a main reversing valve fails during the operation of the truck crane or during the whole vehicle operation, the expansion and contraction of the cylinder controlled by the main reversing valve will be out of control. The safety and reliability of the boom are not guaranteed. Utility model content The embodiment of the utility model provides a boom arm cylinder switching control device, which realizes switching control of two cylinders of a truck crane boom, and ensures the safety and reliability of the boom.

 The embodiment of the present invention provides a boom cylinder switching control device, comprising: a cylinder (1), a cylinder (2), and a main reversing valve (3), wherein

 The small cavity of the oil cylinder (1) communicates with the small cavity of the oil cylinder (2), the A port of the main reversing valve (3) is connected with the small cavity of the oil cylinder (1), and the B port and the oil cylinder of the main reversing valve (3) are connected. (1) The large chamber connection, the B port of the main reversing valve (3) is connected to the large cavity of the cylinder (2).

 Wherein, the main reversing valve (3) is,

 Type 0 medium position function reversing valve;

 The cylinder (1) is a telescopic cylinder, and the cylinder (2) is a telescopic cylinder.

 The utility model further comprises a two-way cartridge valve (7), a heart tube (10), a balance valve (11), and a heart tube (10) passing through the oil cylinder (1), which is distributed with the same axis of the oil cylinder (1), the heart tube One end of (10) is connected to the two-way cartridge valve (7), and the other end is connected to the balancing valve (11);

 The B port of the main reversing valve (3) is connected to the large chamber of the cylinder (2) through the two-way cartridge valve (7), the heart tube (10) and the balancing valve (11).

 Among them, the two-way cartridge valve (8) and the balancing valve (12) are also included.

 The B port of the main reversing valve (3) is connected to the large chamber of the cylinder (1) through the two-way cartridge valve (8) and the balancing valve (12).

 Among them, also includes the reversing valve (9),

 The reversing valve (9) is a P-type three-position four-way reversing valve, the reversing valve (9) is connected with the two-way cartridge valve (7), and the reversing valve (9) is connected with the two-way cartridge valve (8) .

 Among them, also includes the shuttle valve (5),

 An oil inlet of the shuttle valve (5) is connected to the A port of the main reversing valve (3), and the other oil inlet of the shuttle valve (5) is connected to the B port of the main reversing valve (3), and the shuttle valve ( 5) The oil outlet is connected to the reversing valve (9);

 The reversing valve (9) takes oil from the A port of the main reversing valve (3) through the shuttle valve (5), and the reversing valve (9) is taken from the B port of the main reversing valve (3) through the shuttle valve (5). oil.

Among them, also includes the solenoid valve (4), The solenoid valve (4) is connected to the small cavity of the cylinder (1).

 Among them, also includes the solenoid valve (6),

 The solenoid valve (6) is installed between the two-way cartridge valve (7) and the core tube (10).

 Compared with the prior art, the embodiment of the present invention has the following advantages:

 By using a boom cylinder switching control device provided by an embodiment of the present invention, a 0-type neutral function main control valve is used to realize switching control of two cylinders of the boom, ensuring the operation process of the boom In the middle, or in the process of the whole vehicle, the safety and control of the cylinder is ensured, which ensures the safety and reliability of the crane boom. DRAWINGS

 1 is a hydraulic schematic diagram of a boom cylinder control device in the prior art;

 2 is a hydraulic schematic diagram of a boom cylinder switching control device according to an embodiment of the present invention;

 illustration

 1, oil red 2, oil red

 3, the main reversing valve 4, solenoid valve

 5, shuttle valve 6, solenoid valve

 7, two-way cartridge valve 8, two-way cartridge valve

 9, the reversing valve 10,

 , '官 &

 11, balance valve 12, balance valve. detailed description

 The technical solutions in the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention.

The utility model provides a boom arm cylinder switching control device, as shown in FIG. 2 As shown, including, the cylinder 1, the cylinder 2, the main reversing valve 3, wherein

 The small cavity of the oil cylinder 1 and the small cavity of the oil cylinder 2 communicate with each other, the A port of the main reversing valve 3 is connected with the small cavity of the oil cylinder 1, and the B port of the main reversing valve 3 is connected with the large cavity of the oil cylinder 1, the main reversing valve Port B of 3 is connected to the large cavity of the cylinder 2.

 Wherein, the main reversing valve 3 is

 Type 0 medium position function reversing valve;

 Oil red 1 is a telescopic oil red, and oil red 2 is a telescopic oil red.

 Among them, the two-way cartridge valve 7, the heart tube 10, the balance valve 11,

 The heart tube 10 passes through the cylinder 1 and is distributed with the same axis of the cylinder 1. One end of the core tube 10 is connected to the two-way cartridge valve 7, and the other end is connected to the balancing valve 11.

 The B port of the main reversing valve 3 is connected to the large chamber of the cylinder 2 through the two-way cartridge valve 7, the core tube 10 and the balancing valve 11 in sequence.

 Also included, a two-way cartridge valve 8 and a balancing valve 12,

 The B port of the main reversing valve 3 is connected to the large chamber of the cylinder 1 through the two-way cartridge valve 8 and the balancing valve 12 in sequence.

 Among them, also includes the reversing valve 9,

 The reversing valve 9 is a P-type three-position four-way reversing valve, the reversing valve 9 is connected to the two-way cartridge valve 7, and the reversing valve 9 is connected to the two-way cartridge valve 8.

 Among them, also includes the shuttle valve 5

 An oil inlet of the shuttle valve 5 is connected to the A port of the main reversing valve 3, and the other oil inlet of the shuttle valve 5 is connected to the B port of the main reversing valve 3, and the oil outlet and the reversing valve of the shuttle valve 5 9 connection; the reversing valve 9 takes oil from the port A of the main reversing valve 3 through the shuttle valve 5, and the reversing valve 9 takes oil from the port B of the main reversing valve 3 through the shuttle valve 5 for the cylinder 1 and the cylinder 2 switching control.

 Among them, it also includes the solenoid valve 4

 The solenoid valve 4 is connected to the small cavity of the cylinder 1 for controlling the release of the pressure oil in the small chamber of the cylinder 1 and the release of the pressure oil in the small chamber of the cylinder 2.

 Among them, also includes, solenoid valve 6,

The solenoid valve 6 is installed between the two-way cartridge valve 7 and the core tube 10 for controlling the residual oil discharge in the large chamber of the cylinder 2. By using a boom cylinder switching control device provided by an embodiment of the present invention, a 0-type medium-function main control valve is used to realize switching control of two cylinders of the automobile boom, thereby ensuring the operation of the boom. In the process, or during the driving process of the vehicle, the safety and control of the cylinder are ensured, which ensures the safety and reliability of the crane boom.

 The utility model provides a boom arm cylinder switching control device, which realizes switching control of two oil cylinders. The hydraulic principle of the boom cylinder cylinder switching control is shown in FIG. 2, including: oil red 1, oil red 2 Main reversing valve 3, solenoid valve 4, shuttle valve 5, solenoid valve 6, two-way cartridge valve 7, two-way cartridge valve 8, reversing valve 9, heart tube 10, balancing valve 11 and balancing valve 12.

 Among them, oil red 1 is a telescopic oil red, and oil red 2 is a telescopic oil red;

 The main reversing valve 3 is a 0-type neutral function reversing valve, the P port of the main reversing valve 3 is connected to the oil pump, and the T port of the main reversing valve 3 is connected to the oil tank; the small cavities of the oil cylinder 1 and the cylinder 2 are connected to each other through the rubber hose. The port A of the main reversing valve 3 is connected to the small chamber of the cylinder 1.

 The B port of the main reversing valve 3 is connected to the two-way cartridge valve 7, and the B port of the main reversing valve 3 is connected to the two-way cartridge valve 8; wherein the B port of the main reversing valve 3 is connected to the two-way cartridge valve 7, B port pressure oil is supplied to the large cavity of the cylinder 2 through the two-way cartridge valve 7, the core tube 10 in the cylinder 1, and the balance valve 11; the B port of the main reversing valve 3 is connected to the two-way cartridge valve 8, The B port pressure oil supplies oil to the large cavity of the cylinder 1 through the two-way cartridge valve 8 and the balance valve 12; the heart tube 10 passes through the cylinder 1 and is distributed with the same axis of the cylinder 1, and one end of the core tube 10 and the two-way insertion The valve 7 is connected, and the other end of the core tube 10 is connected to the balancing valve 11.

 The two-way cartridge valve 7 is connected to the reversing valve 9, the two-way cartridge valve 8 is connected to the reversing valve 9, the reversing valve 9 is a P-type three-position four-way reversing valve, and the reversing valve 9 is in two-way insertion The closing of the valve 7 and the two-way cartridge valve 8 is controlled, so that the pressure oil of the control port B enters the cylinder 2 and the cylinder 1 through the two-way cartridge valve 7 and the two-way cartridge valve 8, thereby realizing the cylinder 1 and the cylinder 2 Switching control; Specifically, one inlet port of the shuttle valve 5 is connected to the A port of the main reversing valve 3, and the other inlet port of the shuttle valve 5 is connected to the B port of the main reversing valve, and the oil outlet of the shuttle valve 5 is The reversing valve 9 is connected, and the reversing valve 9 takes oil from the A port and the B port of the main reversing valve 9 through the shuttle valve 5, thereby realizing switching control of the cylinder 1 and the cylinder 2.

The solenoid valve 4 is connected to the small cavity of the cylinder 1, and the small cavity of the cylinder 1 is connected with the small cavity of the cylinder Therefore, the solenoid valve 4 is connected to the small cavity of the cylinder 2, and the solenoid valve 4 is used for controlling the release of the pressure oil in the small chamber of the cylinder 1, and the release of the pressure oil in the small chamber of the cylinder 2.

 The solenoid valve 6 is installed between the two-way cartridge valve 7 and the core tube 10 for controlling the residual oil discharge in the large chamber of the cylinder 2.

 The hydraulic working principle of the boom cylinder switching control device provided by the embodiment of the present invention is as follows:

 When the cylinder 2 is required to extend, the main reversing valve 3 is operated to the left position, the port B of the main reversing valve 3 is connected to the oil pump, and the oil pump inputs the pressure oil to the oil passage through the port B, and the DT4 of the reversing valve 9 is energized. The reversing valve 9 is operated in the right position, the upper chamber of the two-way cartridge valve 7 is turned on, the upper chamber control oil is released, the inlet and outlet ports of the two-way cartridge valve 7 are turned on; the pressure oil is controlled by the main reversing valve 3 The B port flows through the two-way cartridge valve 7, the heart tube 10, and the balance valve 11 into the large cavity of the cylinder 2, and pushes the cylinder 2 to extend under the action of the pressure oil, and the residual oil in the large cavity of the cylinder 2 passes through the solenoid valve 6 The pressure oil enters the large cavity of the cylinder 2, pushing the cylinder 2 to extend, and the pressure oil in the small cavity of the cylinder 2 is returned to the oil tank through the A port. The main reversing valve 3 is operated in the left position, and the DT4 of the reversing valve 9 is energized to complete the extension of the cylinder 2.

 When the cylinder 1 is required to extend, the main reversing valve 3 is operated to the left position, and the B port of the main reversing valve 3 is connected to the oil pump, so that the DT3 of the reversing valve 9 is energized, the reversing valve 9 is operated to the left position, and the two-way insertion is performed. The upper chamber of the valve 8 is turned on, the upper chamber control oil is released, the inlet and outlet of the two-way cartridge valve 8 are turned on, and the pressure oil flows from the B port of the main reversing valve 3 through the two-way cartridge valve 8, the balance valve 12 enters the large cavity of the cylinder 1, and pushes the cylinder 1 to extend. The main reversing valve 3 is operated in the left position, and the DT3 of the reversing valve 9 is energized to complete the extension of the cylinder 1.

When the cylinder 2 is required to be retracted, the main reversing valve 3 is operated in the right position, and the port A of the main reversing valve 3 is connected to the oil pump, and the pressure oil passes through the small port of the cylinder 1 through the port A and enters the small cavity of the cylinder 2, at which time The DT4 of the valve 9 is energized, the reversing valve 9 is operated in the right position, the upper chamber of the two-way cartridge valve 7 is turned on, the upper chamber control oil is released, and the inlet and outlet ports of the two-way cartridge valve 7 are turned on; The large cavity pressure oil of 2 is returned to the oil tank through the balance valve 11, the heart tube 10, the two-way cartridge valve 7, and the B port of the main reversing valve 3; the pressure oil enters the cylinder 2 through the A port of the main reversing valve 3 In the small cavity, the large cavity pressure oil in the cylinder 2 is returned to the oil tank, and the cylinder 2 is retracted. The main reversing valve 3 is operated in the right position, and the DT4 of the reversing valve 9 is energized to complete the retracting action of the cylinder 2. When the cylinder 1 is required to retract, the main reversing valve 3 is operated in the right position, the port A of the main reversing valve 3 is connected to the oil pump, and the pressure oil enters the small chamber of the cylinder 1 through the port A, and the DT3 of the reversing valve 9 is electrified. The reversing valve 9 is operated in the left position, the upper chamber of the two-way cartridge valve 8 is turned on, the upper chamber control oil is released, the inlet and outlet ports of the two-way cartridge valve 8 are turned on; the large chamber pressure oil of the cylinder 1 is The balance valve 12 and the two-way cartridge valve 8 are returned to the oil tank through the B port of the main reversing valve 3; the pressure oil enters the small cavity of the cylinder 1 through the A port of the main reversing valve 3, and the large chamber pressure in the cylinder 1 The oil returns to the tank and the cylinder 1 is retracted. The main reversing valve 3 is operated in the right position, and the DT3 of the reversing valve 9 is energized to complete the retracting action of the cylinder 1.

 When the small cavity of the cylinder 1 is required to be depressurized, since the small cavity of the cylinder 1 and the small cavity of the cylinder 2 communicate with each other through the hose, according to the fluidity of the pressure oil, when the small cavity of the cylinder 1 is relieved, it is also The cylinder 2 performs pressure relief; the solenoid valve 6 is energized, and the pressure oil in the cylinder 1 and the small chamber of the cylinder 2 is led back to the tank. The solenoid valve 6 is energized, and the pressure relief of the pressure oil in the small chambers of the cylinder 1 and the cylinder 2 is completed.

 When the truck crane is in the whole vehicle running state, in order to ensure that the cylinder pushes the boom uncontrolled extension during the sudden braking or turning, the main control valve 3 is returned to the neutral position, and the reversing valve is 9 times. Positioning work; main reversing valve 3 back to the middle position, the main port directional valve 3 A and B stop to deliver pressure oil to the cylinder 1 and the cylinder 2, the cylinder 1 and the cylinder 2 large cavity and small cavity are locked; The valve 9 is returned to the neutral position, the two-way cartridge valve 7 and the two-way cartridge valve 8 are closed, and the pressure oil is stopped from being supplied to the cylinder 1 and the cylinder 2; in addition, when the pressure oil enters the cylinder 1, it passes through the balancing valve 12, When the pressure oil enters the cylinder 2, the balance valve 11 is passed, and the balance valve 11 and the balance valve 12 act as a hydraulic buffer and a hydraulic pressure adjustment in the oil passage, and double-protect the cylinder lock. Therefore, the safety and reliability of the boom during operation are effectively controlled by the locking of the two cylinders.

By using a switching control device for a boom cylinder provided by an embodiment of the present invention, a 0-type medium function main control valve is used to realize switching control of two cylinders of the boom, ensuring operation at the boom In the process, or during the driving process of the vehicle, the safety and control of the cylinder are ensured, which ensures the safety and reliability of the crane boom. The above description is only a preferred embodiment of the present invention, it should be noted that A person skilled in the art can make several improvements and retouchings without departing from the principles of the present invention. These improvements and retouchings are also considered to be within the scope of the present invention.

Claims

Rights request A boom cylinder switching control device, comprising: a cylinder (1), a cylinder (2), and a main reversing valve (3), wherein  The small cavity of the oil cylinder (1) communicates with the small cavity of the oil cylinder (2), the A port of the main reversing valve (3) is connected with the small cavity of the oil cylinder (1), and the B port and the oil cylinder of the main reversing valve (3) are connected. (1) The large chamber connection, the B port of the main reversing valve (3) is connected to the large cavity of the cylinder (2).  2. The apparatus according to claim 1, wherein the main reversing valve (3) is a 0-type neutral position reversing valve;  The cylinder (1) is a telescopic cylinder, and the cylinder (2) is a telescopic cylinder.  3. The apparatus according to claim 1, further comprising: a two-way cartridge valve (7), a cardiac tube (10), a balancing valve (11),  The heart tube (10) passes through the cylinder (1) and is distributed with the same axis of the cylinder (1), one end of the core tube (10) is connected with the two-way cartridge valve (7), and the other end is connected with the balancing valve (11);  The B port of the main reversing valve (3) is connected to the large chamber of the cylinder (2) through the two-way cartridge valve (7), the heart tube (10) and the balancing valve (11).  4. Apparatus according to claim 1 or 3, further comprising a two-way cartridge valve (8) and a balancing valve (12),  The B port of the main reversing valve (3) is connected to the large chamber of the cylinder (1) through the two-way cartridge valve (8) and the balancing valve (12).  The apparatus according to claim 4, further comprising a reversing valve (9), the reversing valve (9) being a P-type three-position four-way reversing valve, a reversing valve (9) and two Plug-in valve (7) Connection, the reversing valve (9) is connected to the two-way cartridge valve (8).  6. The apparatus according to claim 5, further comprising: a shuttle valve (5), an oil inlet of the shuttle valve (5) is connected to the A port of the main reversing valve (3), and the shuttle valve ( 5) The other oil inlet is connected to the B port of the main reversing valve (3), and the oil outlet of the shuttle valve (5) is connected with the reversing valve (9); The reversing valve (9) takes oil from the A port of the main reversing valve (3) through the shuttle valve (5), and the reversing valve (9) is taken from the B port of the main reversing valve (3) through the shuttle valve (5). oil. The apparatus of claim 1 further comprising a solenoid valve (4) coupled to the small chamber of the cylinder (1).  The apparatus according to claim 1, further comprising: a solenoid valve (6), the solenoid valve (6) being mounted between the two-way cartridge valve (7) and the core tube (10).