Constant-pressure oil supply device for chain plate type conveyor

Abstract

The utility model belongs to the technical field of hydraulic oil supply devices, and particularly relates to a constant-pressure oil supply device for a chain plate conveyor, which comprises a first oil tank, a second oil tank, a hydraulic electric pump, a one-way valve, an overflow valve, a hydraulic cylinder and a plurality of mechanical reversing valves. An oil outlet of the hydraulic pump is connected with an oil inlet of the one-way valve through a first oil supply pipeline, an oil outlet of the one-way valve is connected with an oil cylinder body of the hydraulic cylinder through a second oil supply pipeline, an oil inlet of the overflow valve is connected to the first oil supply pipeline, and an oil outlet of the overflow valve is connected with the second oil tank. An oil inlet of the motorized reversing valve is connected to the second oil supply pipeline, and an oil outlet of the motorized reversing valve is connected with a nozzle. According to the device, automatic constant-pressure oil supply can be kept for a long time only by starting and stopping a power source once, all friction points of the chain plate conveyor can be lubricated in a fixed-point mode, noise is reduced, and the working environment is maintained.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic oil supply devices, and in particular relates to a constant pressure oil supply device for a chain plate type conveyor. Background Art

[0002] The main disadvantages of chain conveyors are heavy weight and many hinge points. These hinge points will cause the chain conveyor to generate greater friction during operation. These frictions mainly include: friction between the sleeve and the small shaft, friction between the chain plate and the sleeve, friction between the chain plate and the plate, friction between the chain and the bracket, friction between the bracket and the upper and lower racks and side plates, etc.; at the same time, the movement resistance is increased, which increases maintenance costs, makes operation inconvenient, and causes loud noise during operation, affecting the working environment.

[0003] Currently, existing oil feeders generally ensure constant pressure oil supply by frequently starting and stopping the power source, which will cause interference to the equipment and the environment.

[0004] Therefore, there is an urgent need for a constant pressure oil supply device for a chain plate conveyor to solve the above problems. Utility Model Content

[0005] and a tube connecting the dischar e side of the pump with a plug in the forward end of the crank case, said tube having a check valve in it at the pump end, and said former tube which connects the pump to the oil drain plug, said tube having a check valve in it at the pump end, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug, and said former

[0006] Optionally, a weight is fixed to the top end of the piston rod of the hydraulic cylinder.

[0007] Optionally, a magnetic ring is provided at the bottom end of the piston rod of the hydraulic cylinder, and an upper limit magnetic sensor and a lower limit magnetic sensor are installed on the cylinder body of the hydraulic cylinder.

[0008] Specifically, the upper limit magnetic sensor is set at the upper limit position of the cylinder body of the hydraulic cylinder, and the lower limit magnetic sensor is set at the lower limit position of the cylinder body of the hydraulic cylinder. Both the upper limit magnetic sensor and the lower limit magnetic sensor are used to detect the position of the magnetic ring.

[0009] Optionally, the constant pressure oil supply device for the chain conveyor is also provided with a circuit control module, the circuit control module includes a switching power supply and a double-key bistable circuit module, the input end of the switching power supply is connected to 220V AC, the output end of the switching power supply is connected to the power input end of the double-key bistable circuit module, the switching power supply is used to convert 220V AC into 5V DC, the two signal input ends of the double-key bistable circuit module are respectively connected to the positive pole of the switching power supply output end through the upper limit switch and the lower limit switch, one signal output end of the double-key bistable circuit module and one input end of the motor of the hydraulic electric pump are commonly connected to 220V AC, and the other signal output end of the double-key bistable circuit module is connected to the other input end of the motor of the hydraulic electric pump.

[0010] Optionally, the upper limit switch and the lower limit switch are connected to the upper limit magnetic sensor and the lower limit magnetic sensor respectively.

[0011] The present invention also includes other components that enable the normal operation of a constant-pressure oil supply device for a chain-type conveyor, all of which are conventional in the art. Furthermore, any devices or components not otherwise specified in the present invention utilize conventional technologies in the art, such as a hydraulic electric pump, an upper limit magnetic sensor, a lower limit magnetic sensor, and a dual-key bistable circuit module. The dual-key bistable circuit module utilizes a conventional relay module based on a dual-key bistable circuit.

[0012] The working principle of the utility model is that the hydraulic electric pump draws the lubricating oil in the first oil tank into the first oil supply pipeline, the lubricating oil enters the second oil supply pipeline through the one-way valve, and then supplies oil to the hydraulic cylinder and the motorized reversing valve. According to the pressure formula, the pressure of the lubricating oil in the cylinder body of the hydraulic cylinder is equal to the gravity of the weight block divided by the cross-sectional area of ​​the cylinder body. Since the weight of the weight block and the cross-sectional area of ​​the cylinder body are both fixed values, the pressure of the lubricating oil in the hydraulic cylinder remains constant.

[0013] During the operation of the chain conveyor, the chain will occasionally touch the switches of each motorized reversing valve, opening the motorized reversing valve, and the lubricating oil will be sprayed out through the nozzle to lubricate the various locations of the chain conveyor where noise is generated. After that, the motorized reversing valve will reset and close under the action of the spring, and the oil spraying will stop. As the oil in the entire oil supply pipeline continues to decrease, the weight will press the piston rod of the hydraulic cylinder downward, and the magnetic ring will also move downward. When the magnetic ring moves to the lower limit position, the lower limit magnetic sensor detects a signal, turning on the lower limit switch, and the double-button bistable circuit module sends a start signal to the motor. The motor starts, causing the hydraulic pump to pump oil from the first oil tank, increasing the oil in the entire oil supply pipeline and the oil in the hydraulic cylinder, pushing the piston rod upward, and the magnetic ring also moves upward. When the magnetic ring moves to the upper limit position, the upper limit magnetic sensor detects a signal, turning on the upper limit switch, and the double-button bistable circuit module sends a stop signal to the motor, the motor stops, and the hydraulic pump stops pumping oil, achieving the effect of automatic oil supply.

[0014] The beneficial effects of the present invention are: compared with traditional oil suppliers, the present device only needs to start and stop the power source once, and can maintain automatic constant pressure oil supply for a long time, fixed-point lubrication of various friction points of the chain plate conveyor, improve the friction state of the chain plate conveyor during operation, reduce noise, maintain work efficiency, and protect the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a hydraulic system diagram of the present utility model.

[0017] Figure 2 This is a circuit schematic diagram of the circuit control module of the present utility model. DETAILED DESCRIPTION

[0018] The present invention is described below in conjunction with the accompanying drawings and specific embodiments of the present invention. The description herein is intended only to explain the present invention and is not intended to limit the present invention. Based on the embodiments of the present invention, any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without creative work to all other embodiments obtained based on the embodiments of the present invention shall be included within the scope of protection of the present invention.

[0019] Example

[0020] like Figure 1-2As shown, the embodiment of the present invention provides a constant pressure oil supply device for a chain plate conveyor, comprising a first oil tank 1, a second oil tank 2, a hydraulic electric pump 3, a one-way valve 5, a relief valve 6, a hydraulic cylinder 7 and a plurality of motorized reversing valves 8, wherein the hydraulic electric pump 3 comprises a hydraulic pump 4 and a motor M connected to the hydraulic pump 4, the oil inlet of the hydraulic pump 4 is connected to the first oil tank 1, the oil outlet of the hydraulic pump 4 is connected to the oil inlet of the one-way valve 5 through a first oil supply pipeline, and the oil outlet of the one-way valve 5 is connected to the oil inlet of the one-way valve 5 through a second oil supply pipeline. It is connected to the cylinder body of the hydraulic cylinder 7, and the one-way valve 5 is used to prevent oil diversion and protect the hydraulic pump 4; the oil inlet of the relief valve 6 is connected to the first oil supply pipeline, and the oil outlet of the relief valve 6 is connected to the second oil tank 2. The relief valve 6 is used to limit the pressure of the oil and plays a safety protection role; several motorized reversing valves 8 are arranged at various positions of the chain conveyor where noise will be generated, and the oil inlets of several motorized reversing valves 8 are all connected to the second oil supply pipeline, and the oil outlets of several motorized reversing valves 8 are respectively connected to nozzles.

[0021] Among them, a weight block 10 is fixed to the top end of the piston rod of the hydraulic cylinder 7, a magnetic ring 11 is provided at the bottom end of the piston rod of the hydraulic cylinder 7, and an upper limit magnetic sensor 12 and a lower limit magnetic sensor 13 are installed on the cylinder body of the hydraulic cylinder 7. The upper limit magnetic sensor 12 is set at the upper limit position of the cylinder body of the hydraulic cylinder 7, and the lower limit magnetic sensor 13 is set at the lower limit position of the cylinder body of the hydraulic cylinder 7. The upper limit magnetic sensor 12 and the lower limit magnetic sensor 13 are both used to detect the position of the magnetic ring 11.

[0022] In addition, the constant pressure oil supply device for the chain conveyor is also provided with a circuit control module, which includes a switching power supply U1 and a double-key bistable circuit module U2. The input end of the switching power supply U1 is connected to 220V AC, and the output end of the switching power supply U1 is connected to the power input end of the double-key bistable circuit module U2. The switching power supply U1 is used to convert 220V AC into 5V DC. The two signal input ends of the double-key bistable circuit module U2 are respectively connected to the positive pole of the output end of the switching power supply U1 through the upper limit switch K1 and the lower limit switch K2, and the upper limit switch K1 and the lower limit switch K2 are respectively connected to the upper limit magnetic sensor 12 and the lower limit magnetic sensor 13. A signal output end of the double-key bistable circuit module U2 and an input end of the motor M of the hydraulic electric pump 3 are commonly connected to 220V AC, and the other signal output end of the double-key bistable circuit module U2 is connected to the other input end of the motor M of the hydraulic electric pump 3.

[0023] The working principle of the present invention is that the hydraulic electric pump 3 draws the lubricating oil in the first oil tank 1 into the first oil supply pipeline, the lubricating oil enters the second oil supply pipeline through the one-way valve 5, and then supplies oil to the hydraulic cylinder 7 and the motorized reversing valve 8. According to the pressure formula, the pressure of the lubricating oil in the cylinder body of the hydraulic cylinder 7 is equal to the gravity of the weight 10 divided by the cross-sectional area of ​​the cylinder body. Since the weight of the weight 10 and the cross-sectional area of ​​the cylinder body are both fixed values, the pressure of the lubricating oil in the hydraulic cylinder 7 remains constant.

[0024] During the operation of the chain plate conveyor, the chain plate will touch the switches of each motorized reversing valve 8 from time to time, open the motorized reversing valve 8, and the lubricating oil will be sprayed out through the nozzle to lubricate the positions of the chain plate conveyor that generate noise. After that, the motorized reversing valve 8 will be reset and closed under the action of the spring, and the oil spraying will stop; as the oil in the entire oil supply pipeline continues to decrease, the weight 10 will press the piston rod of the hydraulic cylinder 7 downward, and the magnetic ring 11 will also move downward. When the magnetic ring 11 moves to the lower limit position, the lower limit magnetic sensor 13 detects a signal, and the lower limit The position switch K2 is turned on, and the double-key bistable circuit module U2 sends a start signal to the motor M. The motor M starts, causing the hydraulic pump 4 to pump oil from the first oil tank 1, increasing the oil in the entire oil supply pipeline. At the same time, the oil in the hydraulic cylinder 7 increases, pushing the piston rod upward, and the magnetic ring 11 also moves upward. When the magnetic ring 11 moves to the upper limit position, the upper limit magnetic sensor 12 detects a signal, turning on the upper limit switch K1, and the double-key bistable circuit module U2 sends a stop signal to the motor M. The motor M stops, and the hydraulic pump 4 stops pumping oil, achieving the effect of automatic oil supply.

[0025] While the embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A constant pressure oil supply device for a chain plate conveyor, comprising a first oil tank, a second oil tank, a hydraulic electric pump, a one-way valve, a relief valve, a hydraulic cylinder, and several motorized reversing valves, wherein the hydraulic electric pump comprises a hydraulic pump and a motor connected to the hydraulic pump, and is characterized in that: The oil inlet of the hydraulic pump is connected to the first oil tank, the oil outlet of the hydraulic pump is connected to the oil inlet of the one-way valve through the first oil supply pipeline, the oil outlet of the one-way valve is connected to the cylinder body of the hydraulic cylinder through the second oil supply pipeline, the oil inlet of the overflow valve is connected to the first oil supply pipeline, the oil outlet of the overflow valve is connected to the second oil tank, the oil inlets of several motorized reversing valves are all connected to the second oil supply pipeline, and the oil outlets of several motorized reversing valves are respectively connected to nozzles.

2. The constant pressure oil supply device for a chain plate conveyor according to claim 1, characterized in that: A weight is fixed to the top of the piston rod of the hydraulic cylinder.

3. The constant pressure oil supply device for a chain plate conveyor according to claim 2, characterized in that: A magnetic ring is provided at the bottom end of the piston rod of the hydraulic cylinder, and an upper limit magnetic sensor and a lower limit magnetic sensor are installed on the cylinder body of the hydraulic cylinder.

4. The constant pressure oil supply device for a chain plate conveyor according to claim 3, characterized in that: A circuit control module is also provided, which includes a switching power supply and a double-key bistable circuit module. The input end of the switching power supply is connected to 220V AC power, and the output end of the switching power supply is connected to the power input end of the double-key bistable circuit module. The switching power supply is used to convert 220V AC power into 5V DC power. The two signal input ends of the double-key bistable circuit module are respectively connected to the positive pole of the switching power supply output end through the upper limit switch and the lower limit switch. One signal output end of the double-key bistable circuit module and one input end of the motor of the hydraulic electric pump are jointly connected to 220V AC power, and the other signal output end of the double-key bistable circuit module is connected to the other input end of the motor of the hydraulic electric pump.

5. The constant pressure oil supply device for a chain plate conveyor according to claim 4, characterized in that: The upper limit switch and the lower limit switch are connected to the upper limit magnetic sensor and the lower limit magnetic sensor respectively.

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