Locking control loop

Abstract

The invention discloses a locking control loop, which belongs to the field of electrical control and comprises a first electromagnetic directional valve, a second electromagnetic directional valve, an opening and closing oil cylinder, a locking oil cylinder, a first overflow valve, a second overflow valve, a first one-way throttle valve, a second one-way throttle valve, a balance valve, a one-way valve, a logic valve, a hydraulic control one-way valve, a plate type ball valve, a direction valve and an electric control functional component. Two ports of the first electromagnetic directional valve are respectively communicated with the first one-way throttle valve, the balance valve and the one-way valve, the first one-way throttle valve is connected to one end of the opening and closing oil cylinder, and the balance valve and the one-way valve are jointly connected to the other end of the opening and closing oil cylinder; two ports of the second electromagnetic directional valve are sequentially connected with the hydraulic control one-way valve, the second one-way throttle valve and the locking oil cylinder, and the plate type ball valves are connected to the two ends of the second overflow valve; one end of the direction valve is connected with the first electromagnetic directional valve and the second electromagnetic directional valve simultaneously, and the other end is connected with the logic valve. According to the invention, a logic sequence function can be set on hydraulic pipelines of the locking oil cylinder and the opening and closing oil cylinder.

Description

Technical Field

[0001] This invention relates to the field of electrical control technology, and in particular to a locking control circuit. Background Technology

[0002] Traditional solutions achieve logical sequence functions by controlling the locking circuit and the cylinder control circuit with solenoid valves. However, if a solenoid valve malfunctions, the locking cylinder may not open, but the opening and closing cylinders may cause mechanical damage. Summary of the Invention

[0003] The purpose of this invention is to provide a locking control circuit to solve the problems in the prior art.

[0004] To solve the above-mentioned technical problems, the present invention provides a locking control circuit, comprising:

[0005] First solenoid directional valve, second solenoid directional valve, opening and closing cylinder, locking cylinder, first relief valve, second relief valve, first one-way throttle valve, first one-way throttle valve, balance valve, one-way valve, logic valve, hydraulically controlled one-way valve, plate ball valve, directional valve and electrically controlled functional components.

[0006] The two ports of the first electromagnetic reversing valve are respectively connected to the first one-way throttle valve, the balance valve and the one-way valve. The first one-way throttle valve is connected to one end of the opening and closing cylinder, and the balance valve and the one-way valve are connected to the other end of the opening and closing cylinder.

[0007] The two ports of the second electromagnetic directional valve are connected in sequence to the hydraulic control check valve, the second one-way throttle valve, and the locking cylinder, and the plate ball valve is connected to both ends of the second relief valve.

[0008] One end of the directional valve is connected to both the first and second solenoid directional valves, and the other end is connected to the logic valve.

[0009] In one embodiment, when in the locked state, the matching pump station is started, and hydraulic oil enters the P port of the second solenoid directional valve through the P port. The solenoid valve 2Y02 in the second solenoid directional valve is energized, and the hydraulic oil enters the A port of the second solenoid directional valve. The control oil opens the hydraulic control check valve, and the locking cylinder is reset under the action of the spring. The hydraulic oil flows back to the T port of the cylinder through the B port of the second solenoid directional valve through the first one-way throttle valve and the hydraulic control check valve, and the locking cylinder is in the locked state.

[0010] In one implementation, when in the unlocked state, the matching pump station is started, and hydraulic oil enters the P port of the second solenoid directional valve through the P port. The solenoid valve 2Y01 in the second solenoid directional valve is energized, and the hydraulic oil enters the B port of the second solenoid directional valve. It then enters the right oil inlet of the locking cylinder through the hydraulic control check valve and the first one-way throttle valve, balancing the spring force of the locking cylinder and thus unlocking the locking cylinder.

[0011] In one embodiment, in the open state and in the unlocked state, the hydraulic oil opens the directional valve to introduce control oil into the control port of the logic valve, causing the valve core of the logic valve to move. The hydraulic oil passes through the P port, and the logic valve introduces the hydraulic oil into the P port of the first solenoid directional valve. The solenoid valve 1Y01 in the first solenoid directional valve is energized, and the hydraulic oil enters the B port of the first solenoid directional valve. The hydraulic oil enters the right port of the opening and closing cylinder through the balance valve and the one-way port of the check valve, and the cylinder enters the open state.

[0012] In one embodiment, in the closed state and the unlocked state, the hydraulic oil opens the directional valve to introduce control oil into the control port of the logic valve. The valve core of the logic valve moves, and the hydraulic oil passes through the P port. The logic valve introduces the hydraulic oil into the P port of the first solenoid directional valve. The solenoid valve 1Y02 in the first solenoid directional valve is energized, and the hydraulic oil enters the A port of the first solenoid directional valve. The hydraulic oil enters the left port of the opening and closing cylinder through the first one-way throttle valve, and the opening and closing cylinder is in the closed state.

[0013] In one implementation, during logic control, the start and stop functions of the opening and closing cylinders can only be activated when the locking cylinder is in the unlocked state, thus preventing physical damage caused by the opening and closing cylinders operating in the locked cylinder state due to circuit failure.

[0014] The present invention provides a locking control circuit that enables the hydraulic lines of the locking cylinder and the opening and closing cylinder to be equipped with logical sequence functions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a locking control circuit structure provided by the present invention. Detailed Implementation

[0016] The locking control circuit proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this invention.

[0017] The present invention provides a locking control circuit, including electromagnetic reversing valves (1 and 2), opening and closing cylinder 3, locking cylinder 4, overflow valve (5 and 13), one-way throttle valve (6 and 10), balance valve 7, one-way valve 8, logic valve 9, hydraulic control one-way valve 11, plate ball valve 12, directional valve 14, and electronic control functional components.

[0018] The working principle of this invention is as follows:

[0019] 1. Locking state: When the matching pump station is started, the hydraulic oil enters the P port of the solenoid directional valve 2 through the P port. The solenoid valve 2Y02 is energized, and the hydraulic oil enters the A port of the solenoid directional valve 2. The control oil opens the hydraulic control check valve 11, and the locking cylinder 4 is reset under the action of the spring. The hydraulic oil flows back to the cylinder T port through the B port of the solenoid directional valve 2 through the one-way throttle valve 10 and the hydraulic control check valve 11. The locking cylinder 4 is in the locking state.

[0020] 2. Unlocked state: Start the matching pump station, and the hydraulic oil enters the P port of the solenoid directional valve 2 through the P port. The solenoid valve 2Y01 is energized, and the hydraulic oil enters the B port of the solenoid directional valve. It then enters the right oil inlet of the locking cylinder 4 through the hydraulic control check valve 11 and the one-way throttle valve 10, thereby balancing the spring force of the locking cylinder 4 and unlocking the locking cylinder 4.

[0021] 3. Open State: In the unlocked state, the hydraulic oil opens the directional valve 14 and introduces control oil into the control port of the logic valve 9, causing the valve core of the logic valve 9 to move. The hydraulic oil passes through the P port, and the logic valve 9 introduces the hydraulic oil into the P port of the solenoid directional valve 1. The solenoid valve 1Y01 is energized, and the hydraulic oil enters the B port of the solenoid directional valve 1. The hydraulic oil passes through the balance valve 7 and the one-way port of the check valve 8 and enters the right port of the opening and closing cylinder 3, which is in the open state.

[0022] 4. Closed state: In the unlocked state, the hydraulic oil opens the directional valve 14 to introduce control oil into the control port of the logic valve 9. The valve core of the logic valve 9 moves, and the hydraulic oil passes through the P port. The logic valve 9 introduces the hydraulic oil into the P port of the solenoid directional valve 1. The solenoid valve 1Y02 is energized, and the hydraulic oil enters the A port of the solenoid directional valve 1. The hydraulic oil enters the left port of the opening and closing cylinder 3 through the one-way throttle valve 6. The opening and closing cylinder 3 is in the closed state.

[0023] 5. Logic control function: The opening and closing functions of the opening and closing cylinder 3 can only be activated when the locking cylinder 4 is in the unlocked state, so as to avoid physical damage caused by the opening and closing cylinder 3 being activated when the locking cylinder 4 is not unlocked due to circuit failure.

[0024] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A lockup control circuit characterized by comprising: Comprise: The first electromagnetic reversing valve, the second electromagnetic reversing valve, the open and close cylinder, the locking cylinder, the first overflow valve, the second overflow valve, the first one-way throttle valve, the first one-way throttle valve, the balance valve, the one-way valve, the logic valve, the hydraulic control one-way valve, the plate ball valve, the directional valve and the electric control function component; The two ports of the first electromagnetic reversing valve are communicated with the first one-way throttle valve, the balance valve and the one-way valve respectively, the first one-way throttle valve is connected to one end of the open and close cylinder, and the balance valve and the one-way valve are commonly connected to the other end of the open and close cylinder; The two ports of the second electromagnetic reversing valve are connected with the hydraulic control one-way valve, the second one-way throttle valve and the locking cylinder in sequence, and the plate ball valve is connected to both ends of the second overflow valve; One end of the directional valve is connected with the first electromagnetic reversing valve and the second electromagnetic reversing valve, and the other end is connected with the logic valve.

2. The lockup control circuit according to claim 1, characterized by, When the locking state is started, the matching pump station is started, the hydraulic oil enters the P port of the second electromagnetic reversing valve through the P port, the electromagnetic valve 2Y02 in the second electromagnetic reversing valve is electrified, the hydraulic oil enters the A port of the second electromagnetic reversing valve, the control oil opens the hydraulic control one-way valve, and the locking cylinder is reset under the action of the spring, the hydraulic oil flows back to the T port of the oil cylinder through the B port of the second electromagnetic reversing valve through the first one-way throttle valve and the hydraulic control one-way valve, and the locking cylinder is in the locking state.

3. The lock control circuit of claim 2, wherein, When the unlocking state is started, the matching pump station is started, the hydraulic oil enters the P port of the second electromagnetic reversing valve through the P port, the electromagnetic valve 2Y01 in the second electromagnetic reversing valve is electrified, the hydraulic oil enters the B port of the second electromagnetic reversing valve, enters the right oil inlet of the locking cylinder through the hydraulic control one-way valve and the first one-way throttle valve, and the spring force of the balance locking cylinder is used to unlock the locking cylinder.

4. The lock control circuit of claim 3, wherein, When the opening state is started, in the unlocking state, the hydraulic oil opens the directional valve to introduce the control oil into the control port of the logic valve, the spool of the logic valve moves, the hydraulic oil enters the P port of the first electromagnetic reversing valve through the P port, the electromagnetic valve 1Y01 in the first electromagnetic reversing valve is electrified, the hydraulic oil enters the B port of the first electromagnetic reversing valve, the hydraulic oil enters the right port of the open and close cylinder through the balance valve and the one-way port of the one-way valve, and the cylinder enters the opening state.

5. The lock control circuit of claim 4, wherein, When the closing state is started, in the unlocking state, the hydraulic oil opens the directional valve to introduce the control oil into the control port of the logic valve, the spool of the logic valve moves, the hydraulic oil enters the P port of the first electromagnetic reversing valve through the P port, the electromagnetic valve 1Y02 in the first electromagnetic reversing valve is electrified, the hydraulic oil enters the A port of the first electromagnetic reversing valve, and the hydraulic oil enters the left port of the open and close cylinder through the first one-way throttle valve, and the open and close cylinder is in the closing state.

6. The lock-to-control circuit of claim 1, wherein, When the logic control function is started, the starting and closing functions of the open and close cylinder must be in the unlocking state of the locking cylinder to enter the opening and closing function state, so as to avoid physical damage caused by the action of the open and close cylinder under the condition that the locking cylinder is not unlocked due to circuit failure.

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