Novel thermal insulation box hydraulic control system

Abstract

The utility model relates to a novel thermal insulation box hydraulic control system, which belongs to the technical field of hydraulic control and comprises a hydraulic pump, an oil suction port of the hydraulic pump is communicated with a filter B through a pipeline, an inlet end of the filter B is communicated with a hydraulic oil tank through a pipeline, and an outlet of the hydraulic pump is communicated with a motor control reversing valve through a pipeline. According to the novel hydraulic control system for the heat preservation box, a duplex multi-way reversing valve is changed into two independent single-linkage reversing valves, the hydraulic speed regulating valve is additionally arranged between the two independent single-linkage reversing valves, the speed regulating valve plays a role in flow division, the interior of the speed regulating valve has a pressure compensation function, and the flow is stable; the flow entering the rear reversing valve can be freely adjusted through the middle hydraulic speed adjusting valve, the front reversing valve controls the hydraulic motor, and the rear reversing valve controls the cover plate oil cylinder body, so that one oil pump system not only can meet the discharging speed of the spiral conveyor, but also can effectively control the working speed of the cover plate operating oil cylinder body, and the working efficiency is improved. And the opening and closing operation stability and safety of the cover plate are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control, in particular to a new type of hydraulic control system for an insulation box. Background Technique

[0002] The hydraulic system of the asphalt mixture heating and insulation box has two functions that require hydraulic power to complete. One is the driving of the hydraulic motor of the spiral discharging conveyor, and the other is the operation of the hydraulic cylinder for opening and closing the cover plate. At present, the hydraulic control mainly uses a double-connected multi-way valve or an electromagnetic reversing valve for operation control, and the system pressure and flow are mainly considered for the system design of the spiral conveyor.

[0003] However, the working pressure and flow required by the cover plate operation cylinder body are completely different from those of the spiral conveyor motor. If not controlled, the opening and closing speed of the cover plate is too fast. At present, a throttle valve is generally configured to adjust the flow, and a manual operating rod is used for fine control. This requires a high level of operation for the operator. In actual work, if the operation is improper, there are potential safety hazards for personnel and equipment. Therefore, the design of the insulation box hydraulic system needs to consider the adjustable and stable speed of the cover plate operation. Therefore, this application proposes a new type of hydraulic control system for an insulation box to solve the above problems. Summary of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides a new type of hydraulic control system for an insulation box, which has the advantages of improving the safety of personnel and equipment, etc., and solves the problem of high operation requirements.

[0005] To achieve the above object, the utility model provides the following technical solution: A new type of hydraulic control system for an insulation box, including a hydraulic pump. The suction port of the hydraulic pump is connected to a filter B through a pipeline. The inlet end of the filter B is connected to a hydraulic oil tank through a pipeline. The outlet of the hydraulic pump is connected to a motor control reversing valve through a pipeline. The A and B ports of the motor control reversing valve are connected to a hydraulic motor. The T port of the motor control reversing valve is connected to a speed control valve. The working oil port of the speed control valve is connected to an oil cylinder control reversing valve and is connected to the P port of the oil cylinder control reversing valve. The oil return port EX of the speed control valve and the T port of the oil cylinder control reversing valve are both connected back to the hydraulic oil tank. The A and B ports of the oil cylinder control reversing valve are connected to an oil cylinder body. A hydraulic control one-way valve is arranged between the oil cylinder control reversing valve and the oil cylinder body. A filter A is sleeved on the connection pipeline between the oil return port EX of the speed control valve and the T port of the oil cylinder control reversing valve and the hydraulic oil tank.

[0006] Further, the suction port of the hydraulic pump is connected to the hydraulic oil tank through the filter B.

[0007] Further, the outlet of the hydraulic pump is connected to the P port of the motor control reversing valve.

[0008] Further, the A and B ports of the motor control reversing valve respectively correspond to the inlet and outlet of the hydraulic motor.

[0009] Further, the T port of the motor control reversing valve is connected to the hydraulic oil tank through a pipeline.

[0010] Further, the T port of the motor control reversing valve is connected to the inlet port IN of the speed control valve.

[0011] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0012] In this new type of thermal insulation box hydraulic control system, the double-connected multi-way reversing valve is changed to two independent single-connected reversing valves, and a hydraulic speed control valve is added between the two independent single-connected reversing valves. The speed control valve plays a role in flow splitting. The speed control valve has a pressure compensation function inside and the flow is stable. The flow rate entering the latter reversing valve can be arbitrarily adjusted through the intermediate hydraulic speed control valve. The former reversing valve controls the hydraulic motor, and the latter reversing valve controls the cover cylinder body. Therefore, one oil pump system can not only meet the discharging speed of the screw conveyor, but also effectively control the working speed of the cover operation cylinder body. The stability and safety of the cover opening and closing operation are greatly improved. Therefore, the improved hydraulic system not only meets the working speed requirements of the screw conveyor, but also the cover opening and closing operation can be adjusted to an ideal speed, and has good stability, effectively reducing the potential safety hazards of personnel and equipment caused by out-of-control speed during the cover operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the control system of the present utility model.

[0014] In the figure: 1 hydraulic pump, 2 motor control reversing valve, 3 hydraulic motor, 4 speed control valve, 5 cylinder control reversing valve, 6 hydraulic control check valve, 7 cylinder body, 8 filter A, 9 filter B, 10 hydraulic oil tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0016] Please refer to Figure 1, in the new thermal insulation box hydraulic control system of this embodiment, it includes a hydraulic pump 1. The oil suction port of the hydraulic pump 1 is connected to a filter B9 through a pipeline. The inlet end of the filter B9 is connected to a hydraulic oil tank 10 through a pipeline. The outlet of the hydraulic pump 1 is connected to a motor control reversing valve 2 through a pipeline. The A and B ports of the motor control reversing valve 2 are connected to a hydraulic motor 3. The T1 port of the motor control reversing valve 2 is connected to a speed control valve 4. The working oil port of the speed control valve 4 is connected to an oil cylinder control reversing valve 5 and is connected to the P port of the oil cylinder control reversing valve 5. The oil return port EX of the speed control valve 4 and the T port of the oil cylinder control reversing valve 5 are both connected back to the hydraulic oil tank 10. The A and B ports of the oil cylinder control reversing valve 5 are connected to an oil cylinder body 7. A pilot-operated check valve 6 is arranged between the oil cylinder control reversing valve 5 and the oil cylinder body 7. A filter A8 is sleeved on the connecting pipeline between the oil return port EX of the speed control valve 4 and the T port of the oil cylinder control reversing valve 5 and the hydraulic oil tank 10.

[0017] Among them, the oil suction port of the hydraulic pump 1 is connected to the hydraulic oil tank 10 through the filter B9.

[0018] It should be noted that the hydraulic pump 1 needs to suck hydraulic oil from the hydraulic oil tank 10 for use.

[0019] Before the hydraulic oil is sucked into the hydraulic pump 1 from the hydraulic oil tank 10, it must pass through the filter B9.

[0020] The filter B9 is arranged between the hydraulic oil tank 10 and the oil suction port of the hydraulic pump 1 to ensure that the hydraulic oil is filtered before being pumped.

[0021] Among them, the outlet of the hydraulic pump 1 is connected to the P port of the motor control reversing valve 2.

[0022] It should be noted that the pressurized hydraulic oil generated by the hydraulic pump 1 will be directly delivered to the P port of the motor control reversing valve 2.

[0023] Through this connection, the motor control reversing valve 2 can use the pressure oil from the hydraulic pump 1 to drive the connected hydraulic motor 3.

[0024] The motor control reversing valve 2 changes the path of the hydraulic oil flowing to the hydraulic motor 3 according to the instructions of the control system, and controls the start, stop and rotation direction of the motor.

[0025] Among them, the A and B ports of the motor control reversing valve 2 respectively correspond to the inlet and outlet of the hydraulic motor 3.

[0026] In summary, the A port: is connected to the inlet of the hydraulic motor 3. When the A port of the motor control reversing valve 2 is activated, the pressurized hydraulic oil will flow into the hydraulic motor 3, pushing the motor to rotate.

[0027] Port B: It is connected to the outlet of the hydraulic motor 3. When the hydraulic motor 3 is working, the used hydraulic oil will flow out from the outlet of the motor and return to other parts of the system through Port B, such as the fuel tank or return to the fuel tank through the oil return port of the reversing valve.

[0028] By controlling the connection status of Ports A and B of the motor control reversing valve 2 to the hydraulic motor 3, the forward and reverse rotations of the motor can be controlled:

[0029] Forward rotation: When Port A is connected to the pressure oil source and Port B is connected to the oil return port, the hydraulic motor 3 will rotate in one direction (forward rotation).

[0030] Reverse rotation: When the setting of the reversing valve is changed so that Port B is connected to the pressure oil source and Port A is connected to the oil return port, the hydraulic motor 3 will rotate in the opposite direction (reverse rotation).

[0031] Among them, Port T of the motor control reversing valve 2 is connected to the hydraulic fuel tank 10 through a pipeline.

[0032] When Port T of the motor control reversing valve 2 is directly connected to the hydraulic fuel tank 10 through a pipeline, the hydraulic oil flow path of the system is as follows:

[0033] When the hydraulic motor 3 does not need to work or the system needs to unload pressure, Port T of the motor control reversing valve 2 can be opened so that the hydraulic oil in the motor flows back to the fuel tank through Port T.

[0034] This configuration allows the system to safely return the hydraulic oil to the fuel tank when there is no need for power output to the load, reducing energy loss and preventing system overheating or damage that may be caused by long-term high pressure.

[0035] Among them, Port T1 of the motor control reversing valve 2 is connected to the inlet IN of the speed control valve 4.

[0036] When Port T1 of the motor control reversing valve 2 is connected to the inlet IN of the speed control valve 4, the hydraulic oil flow path of the system is as follows:

[0037] After the hydraulic oil flows out from the hydraulic pump 1, it will pass through the motor control reversing valve 2, and a part of the hydraulic oil will flow out through Port T1.

[0038] The hydraulic oil flowing out from Port T1 then directly enters the inlet IN of the speed control valve 4.

[0039] The speed control valve 4 adjusts the flow rate of the hydraulic oil according to the system requirements to control the operating speed of the subsequent hydraulic components (such as the cylinder control reversing valve 5 and the cylinder body 7).

[0040] The working principle of the above embodiment is as follows: When the system is working, the hydraulic oil provided by the hydraulic pump 1 first passes through the motor control reversing valve 2 to control the forward or reverse rotation of the hydraulic motor 3 to drive the screw conveyor to discharge materials or reverse. The hydraulic oil at the T1 interface of the motor control reversing valve 2 enters the speed control valve 4 and then is divided. Part of it enters the control oil cylinder control reversing valve 5 through the working oil port CF, and the other part returns to the hydraulic oil tank 10 through the oil return port EX. The hydraulic oil divided by the speed control valve 4 controls the oil cylinder body 7 through the oil cylinder control reversing valve 5, so as to achieve the purpose of arbitrarily adjusting the working speed of the cover plate oil cylinder body 7. The pilot-operated check valve 6 (hydraulic lock) is provided to prevent the oil cylinder body 7 from falling freely.

[0041] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0042] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention.

Claims

1. A novel heat preservation box hydraulic control system, comprising a hydraulic pump (1), characterized in that: The oil suction port of the hydraulic pump (1) is connected to a filter B (9) through a pipeline, the inlet end of the filter B (9) is connected to a hydraulic oil tank (10) through a pipeline, the outlet of the hydraulic pump (1) is connected to a motor-controlled reversing valve (2) through a pipeline, the A and B interfaces of the motor-controlled reversing valve (2) are connected to a hydraulic motor (3), the T1 interface of the motor-controlled reversing valve (2) is connected to a speed regulating valve (4), the working oil port of the speed regulating valve (4) is connected to an oil cylinder control reversing valve (5), and is connected to the oil cylinder The P interface of the control reversing valve (5) is connected, the oil return port EX of the speed regulating valve (4) and the T port of the cylinder control reversing valve (5) are both connected to the hydraulic oil tank (10), the A and B interfaces of the cylinder control reversing valve (5) are connected to the cylinder body (7), a hydraulically controlled one-way valve (6) is arranged between the cylinder control reversing valve (5) and the cylinder body (7), and a filter A (8) is sleeved on the connecting pipe between the oil return port EX of the speed regulating valve (4) and the T port of the cylinder control reversing valve (5) and the hydraulic oil tank (10).

2. The novel heat preservation box hydraulic control system according to claim 1 is characterized in that: The oil suction port of the hydraulic pump (1) is connected to the hydraulic oil tank (10) via a filter B (9).

3. The novel heat preservation box hydraulic control system according to claim 1 is characterized in that: The outlet of the hydraulic pump (1) is connected to the P port of the motor control reversing valve (2).

4. The novel heat preservation box hydraulic control system according to claim 1 is characterized in that: The A and B interfaces of the motor control reversing valve (2) correspond to the inlet and outlet of the hydraulic motor (3) respectively.

5. The novel heat preservation box hydraulic control system according to claim 1 is characterized in that: The T port of the motor-controlled reversing valve (2) is connected to the hydraulic oil tank (10) through a pipeline.

6. The novel heat preservation box hydraulic control system according to claim 1 is characterized in that: The T1 interface of the motor control reversing valve (2) is connected to the oil inlet IN of the speed regulating valve (4).

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