Novel integrated motor protection device for crane

Abstract

The utility model discloses a novel integrated motor protection device of a crane, which comprises a U-shaped pipe, a valve block and an oil storage device which are connected in sequence, and the oil storage device is connected with an oil tank through a hose; a protective valve and an alarm triggering device are arranged on the hose; a port A of the valve block is connected with a leakage port of the motor, and a port B of the valve block is connected with the U-shaped pipe. High back pressure of a motor leakage port is prevented, and the motor is protected; when the motor leakage protection device works, the effect can be found in time, and oil leakage or excessive oil leakage of the system is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hoist, especially a novel integrated motor protection device of hoist. BACKGROUND

[0002] The hoist refers to a multi-action hoisting machinery capable of vertically lifting and horizontally carrying heavy objects within a certain range. The integrated refers to the way of integrating some functions. The motor protection device refers to the device for preventing the motor from being damaged due to high back pressure caused by poor back oil leakage of the motor oil leakage path when the hoist is in action.

[0003] With the development of China's economy, the market has higher and higher requirements for the hoisting performance of the hoist, and the design of the hydraulic system plays a crucial role in the performance of the hoist. The design of the hydraulic system is becoming more and more complex. The prior art such as the utility model patent "A grass trimmer hydraulic motor protection system" (CN202122409636.X) and the utility model patent "A deep water operation special hydraulic motor" (CN202320936170.5). However, the prior art has the following problems: 1. The motor leakage back pressure is high, and the motor protection device cannot quickly and timely find the oil leakage after it works. 2. The design integration of the motor protection device is not high. 3. The protection device lacks multi-angle water prevention measures.

[0004] Therefore, it is necessary to develop a new type of motor protection device to overcome the above problems. UTILITY MODEL CONTENT

[0005] The utility model discloses a novel integrated motor protection device of hoist, which prevents the motor leakage back pressure from being high and protects the motor. When the motor leakage protection device works, it can timely find the system oil leakage or excessive oil leakage.

[0006] Technical scheme: The utility model discloses a novel integrated motor protection device of hoist, which is characterized by comprising U-shaped pipes, valve blocks and oil storage devices connected in sequence, the oil storage devices are connected with oil tanks through hoses, protection valves and alarm triggering devices are arranged on the hoses, the A port of the valve block is connected with the leakage port of the motor, and the B port of the valve block is connected with the U-shaped pipe.

[0007] Among them, the outlet of the U-shaped pipe is provided with a bending structure for preventing rainwater from entering.

[0008] Among them, the protection valve is installed on the valve block.

[0009] Among them, the outlet of the oil storage device is upward.

[0010] Among them, the alarm triggering device is a pressure switch, a pressure sensor or a flow sensor.

[0011] Compared with the prior art, the utility model has the following remarkable advantages: the utility model prevents the motor leakage port back pressure high, protects the motor, can find in time when the motor leakage protection device works, prevents system oil leakage or too much oil leakage. The integration of the motor oil leakage protection valve and the oil storage device is not high, and the design and assembly efficiency is low. The problem of preventing water from entering the motor in different angle states of the direction changeable motor is solved.

[0012] When the back pressure rises due to poor oil leakage of the loop, the motor protection device can leak oil, and damage due to too high pressure of the oil leakage port is prevented. The protection device is provided with an alarm triggering device, such as a pressure detection switch, which immediately issues an alarm when the pressure reaches the set value, and the alarm is displayed on the display in the control room, improving the system protection and detection intelligence. The oil storage device and the protection valve are integrated together, the integration is high, and it is beneficial to design and assembly. It is used for super lifting and other states with 90° rotation, and the device will not leak oil or water. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model;

[0014] Figure 2 It is a schematic view of the motor protection device of the utility model rotating 90°;

[0015] In the figure, 1 is a U-shaped pipe; 2 is a valve block; 3 is a hose; 4 is a protection valve; 5 is an oil storage device; 6 is an oil tank; 7 is a motor; 8 is an alarm triggering device. DETAILED DESCRIPTION

[0016] The technical scheme of the utility model will be further described below in combination with the drawings and specific embodiments.

[0017] The utility model discloses a crane novel integrated motor protection device, including U-shaped pipe 1, valve block 2 and oil storage device 5 that connect in proper order, oil storage device 5 is connected with oil tank 6 through hose 3;Hose 3 is equipped with protection valve 4 and alarm triggering device 8;Valve block 2's A mouth is connected with the leakage port of motor 7, and the B mouth of valve block 2 is connected with U-shaped pipe 1.U-shaped pipe 1's outlet is equipped with the bending structure that prevents rainwater from entering. Protection valve 4 is installed on valve block 2. The outlet of oil storage device 5 faces upwards. Alarm triggering device 8 is a pressure switch, a pressure sensor or a flow sensor.

[0018] When using, U-shaped pipe 1 prevents the oil temporarily stored in oil storage device 5 from flowing out, whether it is vertical state (such as Figure 1 ) or 90° rotation (such as Figure 2) state, the U-shaped tube 1 outlet is all down, prevents rainwater from entering, pollutes the hydraulic circuit, after the failure of the leakage port, the oil storage device 5 is full of oil and can flow outwards through the U-shaped tube 1, prevents the back pressure from being too high. When the U-shaped tube 1 is used on the motor 7 without angle change, the U-shaped tube 1 can not be used; or the outlet of the oil storage device 5 is connected to the pipeline to the place easy to observe, and timely discovery when oil is discharged from the pipe. The valve block 2 is used to install the protection valve 4, connect the oil storage device 5 and other hydraulic pipelines, and fix the whole device; the protection valve 4 is integrated on the valve block 2 and is opened when the leakage pressure of the motor 7 is higher than the set value, to prevent the back pressure of the motor 7 from being too high; the oil storage device 5 is used to temporarily store a small amount of hydraulic oil discharged from the motor leakage port.

[0019] The motor protection device can discharge oil when the back pressure is increased due to poor oil discharge of the motor circuit, and damage is prevented due to the pressure of the oil discharge port being too high. The device integrates the oil storage device and the protection valve together, and the integration degree is high. The device is used in the working condition of the rotating state of the mechanical device, and the protection device does not leak oil and does not enter water.

[0020] The utility model discloses a motor protection device can discharge oil when the back pressure is increased due to poor oil discharge of the motor circuit, and damage is prevented due to the pressure of the oil discharge port being too high. The device integrates the oil storage device and the protection valve together, and the integration degree is high. The device is used in the working condition of the rotating state of the mechanical device, and the protection device does not leak oil and does not enter water.

[0021] The utility model discloses a motor protection device can discharge oil when the back pressure is increased due to poor oil discharge of the motor circuit, and damage is prevented due to the pressure of the oil discharge port being too high. The device integrates the oil storage device and the protection valve together, and the integration degree is high. The device is used in the working condition of the rotating state of the mechanical device, and the protection device does not leak oil and does not enter water.

Claims

1. A novel integrated motor protection device for cranes, characterized by: It comprises a U-shaped tube (1), a valve block (2) and an oil storage device (5) connected in sequence, the oil storage device (5) is connected with an oil tank (6) through a hose (3), the hose (3) is provided with a protection valve (4) and an alarm triggering device (8), an A port of the valve block (2) is connected with a leakage port of a motor (7), and a B port of the valve block (2) is connected with the U-shaped tube (1).

2. The new integrated motor protection device for cranes according to claim 1, characterized in that: The outlet of the U-shaped tube (1) is provided with a bending structure for preventing rainwater from entering.

3. The new integrated motor protection device for cranes according to claim 1, characterized in that: The protection valve (4) is installed on the valve block (2).

4. The new and improved integrated motor protection device for cranes of claim 1, wherein: The outlet of the oil storage device (5) is upward.

5. The new and improved integrated motor protection device for cranes of claim 1, wherein: The alarm triggering device (8) is a pressure switch, a pressure sensor or a flow sensor.

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