Dual real-time protection system for concrete pump hopper mixing motor

Abstract

The present invention discloses a dual real-time protection system for a concrete pump hopper mixing motor, the system comprising an energy circuit, an execution circuit and a control circuit; the energy circuit comprises a motor, a hydraulic pump and a hydraulic oil tank; the execution circuit comprises a hydraulic on-off valve, an electromagnetic reversing valve and a mixing motor; the control circuit comprises a control unit and an angle sensor, the angle sensor is mounted on the rotating shaft of the concrete pump hopper screen, and is used to detect the opening angle of the concrete pump hopper screen; the control unit is electrically connected to the electromagnetic coil of the electromagnetic reversing valve and the angle sensor respectively, and when the opening angle is greater than a set value, the control unit controls the electromagnetic coil of the electromagnetic reversing valve to lose power. The dual real-time protection system for a concrete pump hopper mixing motor of the present invention can prevent the possible danger of misoperation of the concrete mixing motor when the hopper is opened, thereby enhancing the safety protection of the operator.

Description

Technical Field

[0001] The invention relates to a concrete pump hopper mixing system, in particular to a double real-time protection system for a concrete pump hopper mixing motor. Background Art

[0002] Modern concrete engineering machinery includes many technologies such as mechanical technology, hydraulic technology, electrical technology and control technology, and its products and systems are the integration of many technologies.

[0003] With the rapid development of the national economy, concrete engineering machinery is increasingly used in the fields of housing construction, mine support, mine backfilling, tunnel construction, highway / railway construction, bridge construction, etc. The concrete pump hopper mixing device is a hydraulic system that uses a hydraulic pump connected to a control valve block to drive a hydraulic mixing motor. This system has the disadvantages of easy misoperation and poor protection for operators. In the future, supporting hydraulic equipment will develop in the direction of electrification control, prevention of misoperation, and high safety. Summary of the invention

[0004] To solve the above problems, the present invention provides a dual real-time protection system for a concrete pump hopper mixing motor, which overcomes the shortcomings of the existing concrete pump mixing motor, such as manual control of the hydraulic system, easy misoperation, and poor protection for operators.

[0005] To achieve the above-mentioned purpose, the dual real-time protection system of the concrete pump hopper mixing motor of the present invention includes an energy circuit, an execution circuit and a control circuit; the energy circuit includes a motor, a hydraulic pump and a hydraulic oil tank, the motor is connected to the hydraulic pump, and the oil suction port of the hydraulic pump is connected to the hydraulic oil tank; the execution circuit includes a hydraulic on-off valve, an electromagnetic reversing valve and a mixing motor, the oil outlet of the hydraulic pump is connected to the oil inlet of the hydraulic on-off valve, the oil outlet of the hydraulic on-off valve is connected to the oil inlet of the electromagnetic reversing valve, the first oil outlet of the electromagnetic reversing valve is connected to the oil inlet of the mixing motor, and the second oil outlet of the electromagnetic reversing valve is respectively connected to the oil return port of the mixing motor and the hydraulic oil tank , the oil drain port of the stirring motor is connected to the hydraulic oil tank, and the electromagnetic reversing valve is configured as follows: when the electromagnetic coil of the electromagnetic reversing valve is energized, the oil inlet of the electromagnetic reversing valve is connected to the first oil outlet, and when the electromagnetic coil of the electromagnetic reversing valve is de-energized, the oil inlet of the electromagnetic reversing valve is connected to the second oil outlet; the control circuit includes a control unit and an angle sensor, and the angle sensor is installed on the rotating shaft of the concrete pump hopper screen to detect the opening angle of the concrete pump hopper screen; the control unit is electrically connected to the electromagnetic coil of the electromagnetic reversing valve and the angle sensor respectively, and when the opening angle is greater than the set value, the control unit controls the electromagnetic coil of the electromagnetic reversing valve to de-energize.

[0006] Preferably, the hydraulic on-off valve is arranged at the lower part of the concrete pump hopper screen connecting shaft. When the concrete pump hopper is in working state, the screen can press down the push rod of the hydraulic on-off valve to connect the oil inlet and oil outlet of the hydraulic on-off valve.

[0007] Preferably, the oil outlet of the hydraulic pump is connected to a relief valve, and the oil return port of the relief valve is connected to the hydraulic oil tank.

[0008] Preferably, the oil outlet of the hydraulic pump is connected to a pressure gauge.

[0009] Preferably, the electromagnetic reversing valve is a two-position three-way valve or a two-position four-way valve. When the electromagnetic reversing valve is a two-position four-way valve, the oil return port of the electromagnetic reversing valve is blocked.

[0010] Preferably, the hydraulic pump is a variable displacement pump or a fixed displacement pump, and the hydraulic pump is driven by the motor.

[0011] The dual real-time protection system of the concrete pump hopper mixing motor of the present invention overcomes the shortcomings of the hydraulic system of the existing concrete pump hopper mixing motor that is easy to operate incorrectly and has poor protection for operators, and can prevent the danger that may be caused by incorrect operation when the hopper is opened, thereby enhancing the safety protection for the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the double real-time protection system of the concrete pump hopper mixing motor of the present invention. DETAILED DESCRIPTION

[0013] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0014] like Figure 1 As shown, the dual real-time protection system of the concrete pump hopper mixing motor of the present invention includes an energy loop, an execution loop and a control loop.

[0015] The energy circuit includes a motor 1, a hydraulic pump 2 and a hydraulic oil tank 4. The motor 1 is connected to the hydraulic pump 2, and the oil suction port S of the hydraulic pump 2 is connected to the hydraulic oil tank 4. The hydraulic pump 2 is a variable displacement pump or a fixed displacement pump, and the hydraulic pump 2 is driven by the motor 1.

[0016] The execution circuit includes a hydraulic on-off valve 5, an electromagnetic reversing valve 7 and a stirring motor 8. The oil outlet B1 of the hydraulic pump 2 is connected to the oil inlet P1 of the hydraulic on-off valve 5, the oil outlet A1 of the hydraulic on-off valve 5 is connected to the oil inlet P2 of the electromagnetic reversing valve 7, the first oil outlet A2 of the electromagnetic reversing valve 7 is connected to the oil inlet A3 of the stirring motor 8, the second oil outlet B2 of the electromagnetic reversing valve 7 is respectively connected to the oil return port B3 of the stirring motor 8 and the hydraulic oil tank 4, the oil drain port L of the stirring motor 8 is connected to the hydraulic oil tank 4, and the electromagnetic reversing valve 7 is configured as follows: when the electromagnetic coil of the electromagnetic reversing valve 7 is energized, the oil inlet P2 of the electromagnetic reversing valve 7 is communicated with the first oil outlet A2, and when the electromagnetic coil of the electromagnetic reversing valve is de-energized, the oil inlet P2 of the electromagnetic reversing valve 7 is communicated with the second oil outlet B2.

[0017] The control circuit includes a control unit 10 and an angle sensor 9. The angle sensor 9 is installed on the rotating shaft of the concrete pump hopper screen and is used to detect the opening angle of the concrete pump hopper screen. The control unit 10 is electrically connected to the electromagnetic coil of the electromagnetic reversing valve 7 and the angle sensor 9 respectively. When the opening angle is greater than the set value, the control unit 10 controls the electromagnetic coil of the electromagnetic reversing valve 7 to lose power. When the opening angle is less than the set value, the electromagnetic coil of the electromagnetic reversing valve 7 can be powered on and work.

[0018] The hydraulic on-off valve 5 is arranged at the lower part of the screen connection shaft of the concrete pump hopper. When the concrete pump hopper is in working state, the screen can press down the push rod of the hydraulic on-off valve 5 under the action of gravity, so that the oil inlet P1 and the oil outlet A1 of the hydraulic on-off valve 5 are connected. When the concrete pump hopper is in the open state, the screen leaves the push rod of the hydraulic on-off valve 5, and the hydraulic on-off valve 5 is reset under the action of the spring force, so that the oil inlet P1 and the oil outlet A1 of the hydraulic on-off valve 5 are disconnected. The screen connection shaft is used to fix the screen in the concrete pump hopper. The hydraulic on-off valve 5 is a two-position two-way valve.

[0019] Through the hydraulic on-off valve 5, the push rod of the hydraulic on-off valve 5 is pressed down by the gravity of the screen, so as to control the on-off of the hydraulic oil circuit. The principle is simple, easy to implement, and has sufficient installation space. The angle sensor 9 detects the opening angle of the concrete pump hopper screen. When the opening angle is greater than the set value, the control unit 10 cuts off the power to the electromagnetic reversing valve 7, thereby achieving the dual protection purpose of the hydraulic circuit and the electrical circuit. The electromagnetic reversing valve 7 is controlled by the gain and loss of power of the electromagnetic coil of the electromagnetic reversing valve 7 to control the reversing of the electromagnetic reversing valve 7, so as to control the rotation of the hopper mixing motor 8, thereby realizing the electrification control of the concrete pump hopper mixing device, and greatly improving the operability.

[0020] The oil outlet B1 of the hydraulic pump 2 is connected to a relief valve 6, and the oil return port of the relief valve 6 is connected to the hydraulic oil tank 4. The relief valve 6 prevents the oil outlet pressure of the hydraulic pump 2 from being too high, thereby protecting the hydraulic system components.

[0021] The oil outlet B1 of the hydraulic pump 2 is connected to a pressure gauge 3 for monitoring the pressure of the oil discharged by the hydraulic pump 2 .

[0022] The electromagnetic reversing valve 7 is a two-position three-way valve or a two-position four-way valve. When the electromagnetic reversing valve 7 is a two-position four-way valve, the oil return port T of the electromagnetic reversing valve 7 is blocked.

[0023] The above hydraulic components are connected by hydraulic hoses or steel pipes.

[0024] As mentioned above, the exemplary embodiments of the present invention are described in detail with reference to the accompanying drawings. It should be understood that the present invention is not intended to limit the scope of protection of the present invention by these specific details. Without departing from the spirit and scope of the present invention, the structure and features of the exemplary embodiments may be changed to be equivalent or similar, and these changes will also fall within the scope of protection determined by the claims attached to the present invention.

Claims

1. A double real-time protection system for a concrete pump hopper mixing motor, characterized in that: Includes energy loop, execution loop and control loop; The energy circuit includes a motor, a hydraulic pump and a hydraulic oil tank, the motor is connected to the hydraulic pump, and the oil suction port of the hydraulic pump is connected to the hydraulic oil tank; The execution circuit includes a hydraulic on-off valve, an electromagnetic reversing valve and a stirring motor, the oil outlet of the hydraulic pump is connected to the oil inlet of the hydraulic on-off valve, the oil outlet of the hydraulic on-off valve is connected to the oil inlet of the electromagnetic reversing valve, the first oil outlet of the electromagnetic reversing valve is connected to the oil inlet of the stirring motor, the second oil outlet of the electromagnetic reversing valve is respectively connected to the oil return port of the stirring motor and the hydraulic oil tank, the oil drain port of the stirring motor is connected to the hydraulic oil tank, and the electromagnetic reversing valve is configured as follows: when the electromagnetic coil of the electromagnetic reversing valve is energized, the oil inlet of the electromagnetic reversing valve is communicated with the first oil outlet, and when the electromagnetic coil of the electromagnetic reversing valve is de-energized, the oil inlet of the electromagnetic reversing valve is communicated with the second oil outlet; The control circuit includes a control unit and an angle sensor. The angle sensor is installed on the rotating shaft of the concrete pump hopper screen and is used to detect the opening angle of the concrete pump hopper screen. The control unit is electrically connected to the electromagnetic coil of the electromagnetic reversing valve and the angle sensor respectively. When the opening angle is greater than a set value, the control unit controls the electromagnetic coil of the electromagnetic reversing valve to lose power.

2. The double real-time protection system for the concrete pump hopper mixing motor according to claim 1, characterized in that: The hydraulic on-off valve is arranged at the lower part of the concrete pump hopper screen connecting shaft. When the concrete pump hopper is in working state, the screen can press down the push rod of the hydraulic on-off valve to connect the oil inlet and oil outlet of the hydraulic on-off valve.

3. The double real-time protection system for the concrete pump hopper mixing motor according to claim 1, characterized in that: The oil outlet of the hydraulic pump is connected to a relief valve, and the oil return port of the relief valve is connected to the hydraulic oil tank.

4. The double real-time protection system for the concrete pump hopper mixing motor according to claim 1, characterized in that: The oil outlet of the hydraulic pump is connected with a pressure gauge.

5. The double real-time protection system for the concrete pump hopper mixing motor according to claim 1, characterized in that: The electromagnetic reversing valve is a two-position three-way valve or a two-position four-way valve. When the electromagnetic reversing valve is a two-position four-way valve, the oil return port of the electromagnetic reversing valve is blocked.

6. The double real-time protection system for the concrete pump hopper mixing motor according to claim 1, characterized in that: The hydraulic pump is a variable displacement pump or a fixed displacement pump, and the hydraulic pump is driven by the motor.

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