A hydraulic proportional control system and method for a hydraulic circuit of a cooling bed
By using a hydraulic proportional control system built with solenoid reversing valve, check valve and throttle valve in the cold bed discharge hydraulic circuit, the problem of traditional proportional valves prone to failure after long-term operation is solved, achieving higher reliability and lower maintenance costs.
Patent Information
- Application Number
- CN202510046600.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-04-04
AI Technical Summary
The proportional valves in the existing cold bed feeding hydraulic circuit are prone to zero position drift, aging of the amplification plate and reduced wear accuracy after long-term operation, resulting in difficulty in judging faults and high spare parts and repair costs.
The hydraulic proportional control system is constructed using solenoid reversing valves, check valves and throttle valves, replacing the traditional proportional valves. The system controls the hydraulic oil circuit through an electromagnetic reversing valve, and uses a check valve and a throttle valve in conjunction to realize the extension and retraction of the cold bed feeding arm.
Compared with traditional proportional valves, the new system has strong anti-pollution ability, simple structure, high reliability, low cost, and more convenient fault judgment, which effectively reduces equipment maintenance costs.
Smart Images
Figure CN119755152A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of hydraulic control, and in particular to a hydraulic proportional control system and method for a cooling bed unloading hydraulic circuit. Background Art
[0002] The cooling bed is a work surface for effectively cooling rolled products (rebar, round steel, steel pipe, etc.) in the metallurgical steel rolling industry. The cooling bed consists of a mechanical transmission system, a water cooling system, a cooling bed work surface, a fixed bracket, etc. The cooling beds mainly include tooth extraction cooling beds, rack stepping cooling beds, claw cooling beds, carrier chain cooling beds, and roller cooling beds.
[0003] The working principle of the cooling bed is: the rolled products are transported into the cooling bed through rollers, and then the workpieces arranged on the cooling bed are gradually moved to the top of the cooling bed by rack stepping tooth extraction, thereby achieving the cooling effect of the workpieces.
[0004] The main purpose of the cooling bed is to slowly cool the steel plate naturally after rolling. In the profile production line, the cooling bed also has the function of pre-bending the profile to prevent the profile from bending irregularly due to uneven quality in different places during the natural cooling process. Application: The cooling bed is mainly used in the steel industry, metallurgical industry, etc.
[0005] The unloading arm of the cooling bed is hydraulically controlled. The core of the hydraulic proportional control system is the proportional valve. After long-term operation, it will have zero drift, aging of the amplifier plate, and valve core wear and precision reduction. This is especially true for the 4WRZE proportional valve used in this part, so it is very difficult to judge the fault. The spare parts and repair costs are also relatively high. Only by improving the stability of the equipment control system can the frequency and time of faults be effectively reduced, thereby reducing the equipment maintenance cost. Summary of the invention
[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and propose a hydraulic proportional control system and method for a hydraulic circuit of a cooling bed unloading material. A hydraulic proportional control system is constructed by an electromagnetic reversing valve, a one-way valve and a throttle valve, and the proportional valve of the prior art is replaced. Compared with the proportional valve of the prior art, the control system of the present invention has strong anti-pollution ability, simple structure, high reliability, low cost and convenient fault judgment.
[0007] The present invention solves the technical problem by adopting the following technical solutions:
[0008] A hydraulic proportional control system and method for a cooling bed unloading hydraulic circuit, comprising a control device and an electromagnetic reversing valve, wherein one end of the electromagnetic reversing valve is connected to an oil circuit, the other end of the electromagnetic reversing valve is connected to one end of the control device, and the other end of the control device is connected to a cooling bed unloading arm. The control device is used to control the movement of the cooling bed unloading arm, and the electromagnetic reversing valve is used to control the extension or retraction of the cooling bed unloading arm.
[0009] Moreover, the solenoid reversing valve is a three-position four-way valve, which includes a first input end, a second input end, a first output end and a second output end, wherein the first input end of the solenoid reversing valve is connected to the oil pump, the second output end is connected to the oil tank, and the second input end and the first output end are respectively connected to the control device.
[0010] Moreover, the control device includes a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, a first throttle valve, a second throttle valve, a third throttle valve, and a fourth throttle valve, wherein the first output end of the electromagnetic reversing valve is connected to the input ends of the first one-way valve and the first throttle valve, the output ends of the first one-way valve and the first throttle valve are respectively connected to the output end of the second one-way valve and the input end of the second throttle valve, the input end of the second one-way valve and the output end of the second throttle valve are respectively connected to the input end of the cooling bed unloading arm, the output end of the cooling bed unloading arm is respectively connected to the output end of the third one-way valve and the input end of the third throttle valve, the input end of the third one-way valve and the output end of the third throttle valve are respectively connected to the input ends of the fourth one-way valve and the fourth throttle valve, and the output ends of the fourth one-way valve and the fourth throttle valve are connected to the second input end of the electromagnetic reversing valve.
[0011] A control method for a hydraulic proportional control system of a cooling bed unloading hydraulic circuit comprises the following steps:
[0012] Step 1, the electromagnetic reversing valve is switched according to the working state of the cooling bed unloading arm;
[0013] Step 2: The control device performs control actions according to the reversing of the electromagnetic reversing valve;
[0014] Step 3: Set the opening of the throttle valve so that the cooling bed unloading arm moves according to the set working state.
[0015] Moreover, the phase of the electromagnetic reversing valve in step 1 includes a forward phase, a reverse phase and a shutdown phase, wherein the first input end of the forward phase is connected to the first output end, the second input end is connected to the second output end, the forward phase is used to control the extension of the cooling bed unloading arm, the first input end of the reverse phase is connected to the second input end, the first output end is connected to the second output end, the reverse phase controls the retraction of the cooling bed unloading arm, and the shutdown phase is used to control the cooling bed unloading arm to stop working.
[0016] Moreover, the step 2 includes the extension control action of the cooling bed unloading arm, the retraction control action of the cooling bed unloading arm and the stopping of the cooling bed unloading arm.
[0017] Moreover, the specific implementation method of the extension control action of the cooling bed unloading arm is as follows: the hydraulic oil flows through the first output end of the electromagnetic reversing valve through the first one-way valve and the first throttle valve and is input to the second throttle valve, and flows into the input end of the cooling bed unloading arm through the second throttle valve; the hydraulic oil at the output end of the cooling bed unloading arm is input to the fourth throttle valve through the third one-way valve and the third throttle valve, and flows into the second input end of the electromagnetic reversing valve through the fourth throttle valve.
[0018] Moreover, the specific implementation method of the retraction control action of the cooling bed unloading arm is: the hydraulic oil flows through the second input end of the electromagnetic reversing valve through the fourth one-way valve and the fourth throttle valve and is input to the third throttle valve, and flows into the output end of the cooling bed unloading arm through the third throttle valve; the hydraulic oil at the input end of the cooling bed unloading arm is input to the first throttle valve through the second one-way valve and the second throttle valve, and flows into the first output end of the electromagnetic reversing valve through the first throttle valve.
[0019] The advantages and positive effects of the present invention are:
[0020] The present invention includes a control device and an electromagnetic reversing valve, wherein one end of the electromagnetic reversing valve is connected to an oil circuit, the other end of the electromagnetic reversing valve is connected to one end of the control device, the other end of the control device is connected to a cooling bed unloading arm, the control device is used to control the movement of the cooling bed unloading arm, and the electromagnetic reversing valve is used to control the extension or retraction of the cooling bed unloading arm. The hydraulic proportional control system constructed by the electromagnetic reversing valve, the one-way valve and the throttle valve replaces the proportional valve of the prior art. Compared with the proportional valve of the prior art, the control system of the present invention has strong anti-pollution ability, simple structure, high reliability, low cost and convenient fault judgment. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is the extension control action of the unloading arm of the cooling bed of the present invention;
[0022] Figure 2 It is the retraction control action of the unloading arm of the cooling bed of the present invention;
[0023] Figure 3 For the present invention.
[0024] Description of labels:
[0025] 1-first input end, 2-first output end, 3-second input end, 4-second output end, 5-first one-way valve, 6-second one-way valve, 7-third one-way valve, 8-fourth one-way valve, 9-first throttle valve, 10-second throttle valve, 11-third throttle valve, 12-fourth throttle valve. DETAILED DESCRIPTION
[0026] The present invention is further described in detail below with reference to the accompanying drawings.
[0027] A hydraulic proportional control system and method for a cooling bed unloading hydraulic circuit, such as Figures 1 to 3 As shown, it includes a control device and an electromagnetic reversing valve, wherein one end of the electromagnetic reversing valve is connected to the oil circuit, the other end of the electromagnetic reversing valve is connected to one end of the control device, and the other end of the control device is connected to the cooling bed unloading arm. The control device is used to control the movement of the cooling bed unloading arm, and the electromagnetic reversing valve is used to control the extension or retraction of the cooling bed unloading arm.
[0028] The electromagnetic reversing valve is a three-position four-way valve, and the electromagnetic reversing valve includes a first input end 1, a second input end 3, a first output end 2 and a second output end 4, wherein the first input end of the electromagnetic reversing valve is connected to the oil pump, the second output end is connected to the oil tank, and the second input end and the first output end are respectively connected to the control device.
[0029] The control device comprises a first one-way valve 5, a second one-way valve 6, a third one-way valve 7, a fourth one-way valve 8, a first throttle valve 9, a second throttle valve 10, a third throttle valve 11 and a fourth throttle valve 12, wherein a first output end of the electromagnetic reversing valve is connected to an input end of the first one-way valve and the first throttle valve, an output end of the first one-way valve and the first throttle valve is respectively connected to an output end of the second one-way valve and an input end of the second throttle valve, an input end of the second one-way valve and an output end of the second throttle valve are respectively connected to an input end of a cooling bed unloading arm, an output end of the cooling bed unloading arm is respectively connected to an output end of the third one-way valve and an input end of the third throttle valve, an input end of the third one-way valve and an output end of the third throttle valve are respectively connected to an input end of the fourth one-way valve and the fourth throttle valve, and an output end of the fourth one-way valve and the fourth throttle valve is connected to a second input end of the electromagnetic reversing valve.
[0030] A control method for a hydraulic proportional control system of a cooling bed unloading hydraulic circuit comprises the following steps:
[0031] Step 1: The electromagnetic reversing valve is switched according to the working state of the cooling bed unloading arm.
[0032] The phase of the electromagnetic reversing valve in step 1 includes a forward phase, a reverse phase and a shutdown phase, wherein the first input end of the forward phase is connected to the first output end, the second input end is connected to the second output end, the forward phase is used to control the extension of the cooling bed unloading arm, the first input end of the reverse phase is connected to the second input end, the first output end is connected to the second output end, the reverse phase controls the retraction of the cooling bed unloading arm, and the shutdown phase is used to control the cooling bed unloading arm to stop working.
[0033] Step 2: The control device performs control actions according to the reversing of the electromagnetic reversing valve.
[0034] Step 2 includes the extension control action of the cooling bed unloading arm, the retraction control action of the cooling bed unloading arm and the stopping of the cooling bed unloading arm.
[0035] The specific implementation method of the extension control action of the cooling bed unloading arm is as follows: the hydraulic oil flows through the first output end of the electromagnetic reversing valve through the first check valve and the first throttle valve and is input to the second throttle valve, and flows into the input end of the cooling bed unloading arm through the second throttle valve. The hydraulic oil at the output end of the cooling bed unloading arm is input to the fourth throttle valve through the third check valve and the third throttle valve, and flows into the second input end of the electromagnetic reversing valve through the fourth throttle valve.
[0036] The specific implementation method of the retraction control action of the cooling bed unloading arm is as follows: the hydraulic oil flows through the second input end of the electromagnetic reversing valve through the fourth one-way valve and the fourth throttle valve and is input to the third throttle valve, and flows into the output end of the cooling bed unloading arm through the third throttle valve. The hydraulic oil at the input end of the cooling bed unloading arm is input to the first throttle valve through the second one-way valve and the second throttle valve, and flows into the first output end of the electromagnetic reversing valve through the first throttle valve.
[0037] Step 3: Set the opening of the throttle valve so that the cooling bed unloading arm moves according to the set working state.
[0038] According to the movement of the cooling bed unloading arm, the opening of the throttle valve is set to change the response time of the cooling bed unloading arm. If the cooling bed unloading arm needs to move slower, the opening of the throttle valve needs to be reduced to reduce the flow rate of the oil circuit; if the cooling bed unloading arm needs to move faster, the opening of the throttle valve needs to be increased to increase the flow rate of the oil circuit.
[0039] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention includes but is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.
Claims
1. A hydraulic proportional control system and method for a cooling bed unloading hydraulic circuit, characterized in that: It includes a control device and an electromagnetic reversing valve, wherein one end of the electromagnetic reversing valve is connected to the oil circuit, the other end of the electromagnetic reversing valve is connected to one end of the control device, and the other end of the control device is connected to the cooling bed unloading arm. The control device is used to control the movement of the cooling bed unloading arm, and the electromagnetic reversing valve is used to control the extension or retraction of the cooling bed unloading arm.
2. According to claim 1, a hydraulic proportional control system for a cooling bed unloading hydraulic circuit is characterized in that: The electromagnetic reversing valve is a three-position four-way valve, which includes a first input end, a second input end, a first output end and a second output end, wherein the first input end of the electromagnetic reversing valve is connected to the oil pump, the second output end is connected to the oil tank, and the second input end and the first output end are respectively connected to the control device.
3. According to claim 1, a hydraulic proportional control system for a cooling bed unloading hydraulic circuit is characterized in that: The control device comprises a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, a first throttle valve, a second throttle valve, a third throttle valve and a fourth throttle valve, wherein the first output end of the electromagnetic reversing valve is connected to the input ends of the first one-way valve and the first throttle valve, the output ends of the first one-way valve and the first throttle valve are respectively connected to the output end of the second one-way valve and the input end of the second throttle valve, the input end of the second one-way valve and the output end of the second throttle valve are respectively connected to the input end of the cooling bed unloading arm, the output end of the cooling bed unloading arm is respectively connected to the output end of the third one-way valve and the input end of the third throttle valve, the input end of the third one-way valve and the output end of the third throttle valve are respectively connected to the input ends of the fourth one-way valve and the fourth throttle valve, and the output ends of the fourth one-way valve and the fourth throttle valve are connected to the second input end of the electromagnetic reversing valve.
4. A control method for a hydraulic proportional control system of a cooling bed unloading hydraulic circuit according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1, the electromagnetic reversing valve is switched according to the working state of the cooling bed unloading arm; Step 2: The control device performs control actions according to the reversing of the electromagnetic reversing valve; Step 3: Set the opening of the throttle valve so that the cooling bed unloading arm moves according to the set working state.
5. The control method of the hydraulic proportional control system of the cooling bed unloading hydraulic circuit according to claim 4 is characterized in that: The phase of the electromagnetic reversing valve in step 1 includes a forward phase, a reverse phase and a shutdown phase, wherein the first input end of the forward phase is connected to the first output end, the second input end is connected to the second output end, the forward phase is used to control the extension of the cooling bed unloading arm, the first input end of the reverse phase is connected to the second input end, the first output end is connected to the second output end, the reverse phase controls the retraction of the cooling bed unloading arm, and the shutdown phase is used to control the cooling bed unloading arm to stop working.
6. The control method of the hydraulic proportional control system of the cooling bed unloading hydraulic circuit according to claim 5 is characterized by: The step 2 includes the extension control action of the cooling bed unloading arm, the retraction control action of the cooling bed unloading arm and the stopping of the cooling bed unloading arm.
7. The control method of the hydraulic proportional control system of the cooling bed unloading hydraulic circuit according to claim 6 is characterized by: The specific implementation method of the extension control action of the cooling bed unloading arm is as follows: the hydraulic oil flows through the first output end of the electromagnetic reversing valve through the first one-way valve and the first throttle valve, and is input to the second throttle valve, and flows into the input end of the cooling bed unloading arm through the second throttle valve; the hydraulic oil at the output end of the cooling bed unloading arm is input to the fourth throttle valve through the third one-way valve and the third throttle valve, and flows into the second input end of the electromagnetic reversing valve through the fourth throttle valve.
8. The control method of the hydraulic proportional control system of the cooling bed unloading hydraulic circuit according to claim 6 is characterized by: The specific implementation method of the retraction control action of the cooling bed unloading arm is as follows: the hydraulic oil flows through the second input end of the electromagnetic reversing valve through the fourth one-way valve and the fourth throttle valve and is input to the third throttle valve, and flows into the output end of the cooling bed unloading arm through the third throttle valve; the hydraulic oil at the input end of the cooling bed unloading arm is input to the first throttle valve through the second one-way valve and the second throttle valve, and flows into the first output end of the electromagnetic reversing valve through the first throttle valve.