Rapid brake system of dust collector motor

Abstract

The utility model relates to the technical field of motor control in dust collection and environmental protection industries and other hydraulic motor brake systems, in particular to a rapid brake system for a dust collector motor, which comprises an oil tank, an engine, a gear pump and an integrated valve block. An oil outlet of the gear pump is fixedly connected to an oil inlet of an integrated valve block, an oil port of the integrated valve block is fixedly connected with a dust collection motor, and the oil port of the integrated valve block is provided with a P port, a T port, an A port and a B port. The hydraulic control reversing valve, the dust collection motor and the back pressure valve are arranged, the hydraulic control reversing valve is opened through oil inlet pressure, the motor is rapidly started, dust collection is achieved, fixed resistance is applied to the motor through the back pressure valve in the rod replacement gap and after dust collection is stopped, the motor is rapidly braked, more time is used for back flushing and dust collection filter element cleaning, and the dust collection efficiency is improved. And the filter element can be reversely blown for multiple times within limited rod replacement interval time, dust outside the filter element can be conveniently blown off to the greatest extent, and a better dust collection effect is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of motor control in dust collection and environmental protection industries and other hydraulic motor braking systems, in particular to a dust collector motor rapid braking system. Background Art

[0002] At present, hydraulic motors are generally used to drive the dust collector impeller when drilling rigs, environmental protection machinery and other equipment are operating to achieve a certain negative pressure, collect and discharge the dust generated by drilling or other operations. In order to maintain a stable negative pressure and a good dust collection effect, the speed of the dust collection motor is usually relatively high, about 5000-7000rpm. In addition, dust will continue to adhere to the outside of the filter element during the dust collection process, gradually weakening the dust collection effect. At this time, it is necessary to use compressed air to backflush the dust from the inside of the filter element to maintain the dust collection effect. If the dust collection motor does not stop running, the backflush effect will be poor. Therefore, it is necessary to perform rapid and multiple backflush when the drilling stops and the drill rod is replaced to achieve the purpose of deep dust cleaning. Because the rod replacement time is short, about 1 minute, it is necessary to brake the motor quickly to eliminate the negative pressure in the dust collector. Utility Model Content

[0003] In order to achieve a better dust collection effect, the utility model provides a dust collector motor quick braking system.

[0004] The utility model provides a dust collector motor quick brake system adopts the following technical solutions:

[0005] A dust collector motor rapid braking system comprises an oil tank, an engine, a gear pump and an integrated valve block, wherein the oil outlet of the oil tank is fixedly connected to the oil suction port of the gear pump, the oil outlet of the gear pump is fixedly connected to the oil inlet of the integrated valve block, and the oil port of the integrated valve block is fixedly connected to a dust collector motor; the oil port of the integrated valve block is provided with a P port, a T port, an A port and a B port, the oil inlet of the dust collector motor is fixedly connected to the A port of the integrated valve block, and the oil outlet of the dust collector motor is fixedly connected to the B port of the integrated valve block; the interior of the integrated valve block is fixedly connected with a solenoid valve, a relief valve, a one-way valve, a hydraulically controlled reversing valve and a back pressure valve.

[0006] By adopting the above technical solution, the oil inlet pressure is used to open the hydraulically controlled reversing valve, and the dust collecting motor is quickly started to achieve dust collection. During the rod changing gap, after the dust collecting motor is turned off, the pressure relief and reset function of the hydraulically controlled reversing valve and the function of the back pressure valve are used to apply a fixed resistance to the dust collecting motor to achieve rapid braking, so that more time is used for backblowing and cleaning the dust collecting filter element.

[0007] Preferably, the oil inlet of the solenoid valve and the oil inlet of the relief valve are both located between the P port and the A port of the integrated valve block, and the oil outlet of the solenoid valve and the oil outlet of the relief valve are located at the T port of the integrated valve block.

[0008] By adopting the above technical solution, the dust collection motor is started and stopped by the solenoid valve gaining and losing power. The hydraulic system is unloaded when the motor stops. The set pressure of the relief valve is slightly higher than the maximum working pressure of the system. When the system oil pressure is too high, the relief valve opens to unload part of the hydraulic oil to keep the system pressure within the maximum set value, thereby playing a safety protection role.

[0009] Preferably, the oil inlet of the one-way valve is fixedly connected to the T port of the integrated valve block, and the oil outlet of the one-way valve is fixedly connected between the P port and the A port of the integrated valve block.

[0010] By adopting the above technical solution, the one-way valve is used as an oil replenishing valve. After the oil comes out of the back pressure valve of the hydraulically controlled reversing valve, it flows to the dust collecting motor through the one-way valve, thereby protecting the dust collecting motor.

[0011] Preferably, the oil inlets of the hydraulically controlled reversing valve and the back-pressure valve are fixedly connected to the B port of the integrated valve block, the oil outlets of the hydraulically controlled reversing valve and the back-pressure valve are fixedly connected to the T port of the integrated valve block, the oil outlets of the hydraulically controlled reversing valve and the back-pressure valve are connected to the oil inlet of the one-way valve, the solenoid valve is connected in parallel with the overflow valve, and the hydraulically controlled reversing valve and the back-pressure valve are connected in parallel.

[0012] By adopting the above technical solution, when the gear pump rotates, when the solenoid valve is energized, the hydraulic oil is sucked out of the oil tank, and is transported to the P port of the integrated valve block after passing through the gear pump, and then enters the dust collecting motor at the A port of the integrated valve block. The hydraulically controlled reversing valve opens after sensing the oil inlet pressure. At this time, the oil from the dust collecting motor enters the interior of the integrated valve block from the B port, and then flows through the hydraulically controlled reversing valve, and then flows back to the oil tank through the T port of the integrated valve block; when the solenoid valve loses power, the gear pump is unloaded, and the oil comes out of the oil tank and enters the P port of the integrated valve block, and then directly from the T port of the integrated valve block after passing through the solenoid valve. Return to the oil tank; when the engine is turned off, the gear pump stops rotating quickly, and no hydraulic oil is sent to the P port of the integrated valve block and the oil inlet of the motor. However, the dust collecting motor continues to rotate under the action of the inertia of the impeller, and functionally becomes a hydraulic pump. At this time, negative pressure will be formed at the oil inlet of the dust collecting motor, and it will start to absorb oil. The oil outlet will send the oil to the B port of the integrated valve block and flow into the interior of the integrated valve block. After flowing through the back pressure valve, part of it flows back to the oil tank through the T port of the integrated motor, and part of it flows through the one-way valve and returns to the dust collecting motor from the A port of the integrated valve block again to prevent air suction, thereby protecting the dust collecting motor.

[0013] In summary, the utility model has the following beneficial technical effects:

[0014] 1. This system is equipped with a hydraulically controlled reversing valve, a dust collecting motor and a back pressure valve. The hydraulically controlled reversing valve is opened by the oil inlet pressure, and the motor is started quickly to collect dust. During the interval between rod changes, after the dust collection is closed, a fixed resistance is applied to the motor by the back pressure valve to make it brake quickly, so that more time is used for backflush and cleaning of the dust collecting filter element. This is conducive to realizing multiple backflush of the filter element within the limited interval time between rod changes, and is convenient for blowing off the dust outside the filter element to the greatest extent, thereby obtaining a better dust collecting effect.

[0015] 2. This system is equipped with a solenoid valve. When the dust collecting motor needs to stop, the solenoid valve is de-energized, the valve core is in the open state, and the pressure oil enters the T port of the integrated valve block through the solenoid valve and then returns to the oil tank. Under the action of inertia, the dust collecting motor rotates to discharge oil, reducing the oil discharge speed and outputting it through the back pressure valve. The hydraulic system is in an unloading state and the dust collector does not start; when the solenoid valve is energized, the oil circuit inside the valve core is closed and the pressure of the pressure oil increases. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a hydraulic principle diagram of a dust collector motor quick brake system of the utility model;

[0017] Figure 2 This is a hydraulic principle diagram of the oil tank, gear pump and engine in a dust collector motor quick brake system of the utility model;

[0018] Figure 3 This is a hydraulic principle diagram of a solenoid valve and a relief valve in a dust collector motor quick brake system of the utility model;

[0019] Figure 4 This is a hydraulic principle diagram of a one-way valve, a hydraulically controlled reversing valve and a back pressure valve in a dust collector motor quick brake system of the utility model;

[0020] Figure 5 The utility model discloses a hydraulic principle diagram of a dust collector motor and an integrated valve block in a dust collector motor quick brake system.

[0021] Description of reference numerals:

[0022] 1. Fuel tank; 2. Engine; 3. Gear pump; 4. Solenoid valve; 5. Overflow valve; 6. Check valve; 7. Hydraulic control reversing valve; 8. Back pressure valve; 9. Dust collection motor; 10. Integrated valve block. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-5 The utility model is described in further detail.

[0024] The utility model embodiment discloses a dust collector motor rapid braking system.

[0025] Reference Figure 1 ,2 , including a fuel tank 1, an engine 2, a gear pump 3 and an integrated valve block 10. The oil outlet of the fuel tank 1 is fixedly connected to the oil suction port of the gear pump 3, the oil outlet of the gear pump 3 is fixedly connected to the oil inlet of the integrated valve block 10, and the oil port of the integrated valve block 10 is fixedly connected to the dust collecting motor 9. When the engine 2 is started, the gear pump 3 is driven to suck oil from the fuel tank 1, and the pressure oil is delivered to the P port of the integrated valve block 10, and at the same time reaches the oil inlet of the dust collecting motor 9.

[0026] Reference Figure 1 , 5 The outer surface of the integrated valve block 10 is provided with a P port, a T port, an A port and a B port. The oil inlet of the dust collecting motor 9 is fixedly connected to the A port of the integrated valve block 10, and the oil outlet of the dust collecting motor 9 is fixedly connected to the B port of the integrated valve block 10. Because there is a large fixed pressure loss when the dust collecting motor 9 returns oil, the dust collecting motor 9 stops rotating quickly and stably to achieve braking. By adjusting the pressure of the back pressure valve 8, the braking time of the dust collecting motor 9 can be changed.

[0027] Reference Figure 1 The integrated valve block 10 is internally fixedly connected with a solenoid valve 4, a relief valve 5, a non-return valve 6, a hydraulically controlled reversing valve 7 and a back pressure valve 8. There is a communication connection (known technology) between the solenoid valve 4, the relief valve 5, the non-return valve 6, the hydraulically controlled reversing valve 7 and the back pressure valve 8, which is convenient for integrated control. When the solenoid valve 4 is not powered, the valve core is in an open state, and the pressure oil passes through the solenoid valve 4 into the T port of the integrated valve block 10 and then returns to the oil tank 1. The hydraulic system is in an unloading state, and the dust collecting motor 9 does not start. When the solenoid valve 4 is powered, the internal oil circuit of the valve core of the solenoid valve 4 is closed, and the pressure of the pressure oil increases.

[0028] Reference Figure 1 , 3 The oil inlet of the solenoid valve 4 and the oil inlet of the relief valve 5 are both located between the P port and the A port of the integrated valve block 10. The oil outlet of the solenoid valve 4 and the oil outlet of the relief valve 5 are located at the T port of the integrated valve block 10. The relief valve 5 plays the role of constant pressure overflow, pressure stabilization system unloading and safety protection. When conducting the efficacy test, by setting the pressure and appropriately assisting with other configurations, the remote adjustment of high and low multi-level control can be coordinated to help achieve the remote control purpose. When the drilling work enters the rod change time, the solenoid valve 4 loses power and the system is unloaded. Due to the reduction in oil inlet pressure, the hydraulic control reversing valve is reset 7, and the oil return circuit of the dust collecting motor 9 is closed here. The dust collecting motor 9 continues to rotate under the action of inertia, and the outlet pressure of the dust collecting motor 9 increases. When the set pressure of the back pressure valve 8 is reached, the back pressure valve 8 opens, and the return oil enters the oil tank 1.

[0029] Reference Figure 1 , 4The oil inlet of the one-way valve 6 is located at the T port of the integrated valve block 10, and the oil outlet of the one-way valve 6 is located between the P port and the A port of the integrated valve block 10. The one-way valve 6 serves as an oil replenishing valve to protect the motor.

[0030] Reference Figure 1 , 4 The oil inlets of the hydraulically controlled reversing valve 7 and the back-pressure valve 8 are both fixedly connected to the B port of the integrated valve block 10. The return oil of the dust collecting motor 9 is shut off by resetting the hydraulically controlled reversing valve 7. A fixed resistance is set by the back-pressure valve 8 to achieve rapid braking. The valve for shutting off the return oil of the integrated motor 9 can be a hydraulically controlled, pneumatically controlled, electrically controlled reversing valve, or a balancing valve. The oil outlets of the hydraulically controlled reversing valve 7 and the back-pressure valve 8 are both fixedly connected to the T port of the integrated valve block 10. The oil outlets of the hydraulically controlled reversing valve 7 and the back-pressure valve 8 are both connected to the oil inlet of the check valve 6. When the pressure is greater than the control pressure of the hydraulically controlled reversing valve 7, the hydraulically controlled reversing valve 7 is reversed to open the outlet oil circuit of the dust collecting motor 9, and the dust collecting motor 9 is started to realize the dust collecting function. At this time, the oil inlet and outlet of the back-pressure valve 8 are connected, and it does not work without oil passing through.

[0031] Reference Figure 1 , 3 4. The solenoid valve 4 is connected in parallel with the relief valve 5. The dust collecting motor 9 is started and stopped by the gain and loss of power of the solenoid valve 4. When the dust collecting motor 9 stops, the system is unloaded. The hydraulically controlled reversing valve 7 and the back pressure valve 8 are connected in parallel.

[0032] The implementation principle of a dust collector motor quick brake system in the utility model embodiment is:

[0033] When the dust collecting motor 9 is started, the oil inlet pressure is used to open the hydraulically controlled reversing valve 7, and the dust collecting motor 9 is quickly started to collect dust. In the gap between rod changes, the dust collecting motor 9 is closed and then a fixed resistance is applied to the dust collecting motor using the back pressure valve 8 to brake it quickly, so that more time is used for backblowing and cleaning the dust collecting filter element.

[0034] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A dust collector motor quick braking system, characterized in that: The invention comprises an oil tank (1), an engine (2), a gear pump (3) and an integrated valve block (10), wherein the oil outlet of the oil tank (1) is fixedly connected to the oil suction port of the gear pump (3), the oil outlet of the gear pump (3) is fixedly connected to the oil inlet of the integrated valve block (10), and the oil port of the integrated valve block (10) is fixedly connected to a dust collecting motor (9).

2. A dust collector motor quick brake system according to claim 1, characterized in that: The oil ports of the integrated valve block (10) are provided with a P port, a T port, an A port and a B port, the oil inlet of the dust collecting motor (9) is fixedly connected to the A port of the integrated valve block (10), and the oil outlet of the dust collecting motor (9) is fixedly connected to the B port of the integrated valve block (10).

3. A dust collector motor quick brake system according to claim 2, characterized in that: The integrated valve block (10) is internally fixedly connected with a solenoid valve (4), a relief valve (5), a one-way valve (6), a hydraulically controlled reversing valve (7) and a back pressure valve (8).

4. A dust collector motor quick brake system according to claim 3, characterized in that: The oil inlet of the solenoid valve (4) and the oil inlet of the relief valve (5) are both located between the P port and the A port of the integrated valve block (10), and the oil outlet of the solenoid valve (4) and the oil outlet of the relief valve (5) are located at the T port of the integrated valve block (10).

5. A dust collector motor quick brake system according to claim 4, characterized in that: The oil inlet of the one-way valve (6) is fixedly connected to the T port of the integrated valve block (10), and the oil outlet of the one-way valve (6) is fixedly connected between the P port and the A port of the integrated valve block (10).

6. A dust collector motor quick brake system according to claim 5, characterized in that: The oil inlets of the hydraulically controlled reversing valve (7) and the back pressure valve (8) are both fixedly connected to the B port of the integrated valve block (10); the oil outlets of the hydraulically controlled reversing valve (7) and the back pressure valve (8) are both fixedly connected to the T port of the integrated valve block (10); and the oil outlets of the hydraulically controlled reversing valve (7) and the back pressure valve (8) are both connected to the oil inlet of the one-way valve (6).

7. A dust collector motor quick brake system according to claim 6, characterized in that: The solenoid valve (4) is connected in parallel with the overflow valve (5), and the hydraulically controlled reversing valve (7) is connected in parallel with the back pressure valve (8).

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