CN204553361U - A kind of rotary drilling rig master winch hydraulic system - Google Patents

Abstract

The utility model discloses a main winch hydraulic system of a rotary drilling rig, which comprises a main reversing valve, a shuttle valve, a floating valve, three check valves, an oil tank, a main winch motor, a brake oil cylinder, a controller, two A two-position two-way valve, two hydraulic pumps connected in opposite directions, a relief valve, an accumulator, a shuttle valve and a float valve are connected to the oil inlet and outlet of the main winch motor, and the other oil port of the shuttle valve passes through the first two The two-position two-way valve is connected to the variable pump; the second two-position two-way valve and the one-way valve are connected in parallel between the accumulator and the hydraulic pump. This utility model can convert the gravitational potential energy released when the drill pipe is lowered into hydraulic energy and store it. , and then when the drill pipe bucket is lifted, the hydraulic energy is released to the main oil circuit through the circuit, which realizes energy recovery; The energy consumption is reduced, the heat load of the hydraulic system is reduced, and the service life of hydraulic components and mechanical parts is improved.

Description

A main hoist hydraulic system of a rotary drilling rig

technical field

The utility model relates to a rotary drilling rig, in particular to a main winch hydraulic system of the rotary drilling rig.

Background technique

At present, the lowering of the drill pipe and the drill pipe not only depends on the self-weight of the drill pipe and the drill pipe itself, but also requires a certain power output by the engine to ensure the normal lowering of the drill pipe and the drill pipe. During the lowering of the main winch, the engine still needs to have a load rate of 25% to 30%. Because in the main winch hydraulic system, due to the existence of the balance valve, if the drill pipe and bucket are lowered only by their own weight, the lowering speed will be very slow, which will affect the operating efficiency and cannot meet the needs of actual operations. The average fuel consumption of the engine during the lowering of the main winch accounts for 8% to 12% of the average fuel consumption of the entire cycle process, and the energy consumption is high.

Utility model content

The purpose of this utility model is to overcome the above-mentioned disadvantages and provide a hydraulic system for the main winch of a rotary drilling rig, which cancels the balance valve in the prior art and replaces it with an accumulator, which reduces the heat generation of the hydraulic system and improves the life of the components. Moreover, the gravitational potential energy of lowering the drill pipe and bucket can be recovered, and this part of energy can be returned to the lifting condition, saving energy.

In order to achieve the above purpose, the utility model includes a main reversing valve connected to the P port of the main pump and the S port of the main pump. The two output ends of the main reversing valve are connected to the two ends of the main winch motor, and the main winch motor is connected in parallel Float valve, shuttle valve and confluence valve, the input end of the confluence valve is connected to the output end of the shuttle valve and one input end and the input end of the float valve and the output end of the second one-way valve, the output end of the confluence valve is connected to the other end of the shuttle valve One input end, the output end of the float valve and the output end of the first one-way valve, the input ends of the first one-way valve and the second one-way valve are connected to the first oil tank, and the main winch motor is also connected to the load and the brake. moving cylinder;

The input end of the confluence valve is also connected to the output end of the first two-position two-way valve, and the input end of the first two-position two-way valve is connected to the output end of the third one-way valve through the first variable pump and the second variable pump. and the output end of the second two-position two-way valve, the first variable pump and the second variable pump are coaxially connected, the second oil tank is connected between the first variable pump and the second variable pump, the input of the second two-position two-way valve The end is connected with the input end of the third one-way valve and the accumulator;

The main reversing valve, confluence valve, floating valve, main winch motor, first two-position two-way valve, first variable pump, second variable pump and second two-position two-way valve are all connected to a controller.

The second variable displacement pump is connected to the input end of the relief valve, and the output end of the relief valve is connected to the third oil tank.

The brake oil cylinder is connected to the P port of the pilot pump and the S port of the pilot pump.

Compared with the prior art, the utility model can convert the gravitational potential energy released when the drill bucket is lowered into hydraulic energy and store it, and then release the hydraulic energy to the main oil circuit through the circuit when the drill bucket is lifted, Energy recycling is realized; the utility model cancels the balance valve of the prior art, avoids the energy consumption on the balance valve in the lowering working condition, reduces the thermal load of the hydraulic system, and improves the service life of the hydraulic components and mechanical parts . The device has a simple structure and is convenient to use, operate, install and maintain; the utility model adopts a hydraulic valve and a two-way variable pump to change the pressure, flow and flow direction of the hydraulic oil, and is easy to control the speed of lowering or lifting of the drill pipe and bucket, and works Good safety and easy to realize overload protection.

Further, the utility model has an overflow valve and a third oil tank capable of collecting the overflowed oil.

Description of drawings

Fig. 1 is the schematic diagram of the hydraulic system of the present utility model;

Among them, 1—main reversing valve; 2—merge valve; 3—shuttle valve; 4—floating valve; 5-1—first one-way valve; 5-2—second one-way valve; 6-1—first Fuel tank; 6-2—second fuel tank; 6-3—third fuel tank; 7—main winch motor; 8—load; 9—brake cylinder; 10—controller; 11—first two-position two-way valve; 12—first variable pump; 13—second variable pump; 14—overflow valve; 15—third check valve; 16—second two-position two-way valve; 17—accumulator.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Referring to Fig. 1, the utility model includes a main reversing valve 1 connected to the P port of the main pump and the S port of the main pump, the two output ends of the main reversing valve 1 are connected to the two ends of the main winch motor 7, and the main winch motor 7. The floating valve 4, the shuttle valve 3 and the confluence valve 2 are connected in parallel. The input end of the confluence valve 2 is connected to the output end of the shuttle valve 3 and an input end, and the input end of the float valve 4 and the output of the second one-way valve 5-2. end, the output end of the confluence valve 2 is connected to the other input end of the shuttle valve 3, the output end of the floating valve 4 and the output end of the first check valve 5-1, the first check valve 5-1 and the second check valve The input ends of the valve 5-2 are all connected to the first oil tank 6-1, and the main winch motor 7 is also connected to the load 8 and the brake cylinder 9, and the brake cylinder 9 is connected to the P port of the pilot pump and the S port of the pilot pump;

The input end of the confluence valve 2 is also connected to the output end of the first two-position two-way valve 11, and the input end of the first two-position two-way valve 11 is connected to the second variable pump 13 through the first variable pump 12 and the second variable pump 13 Connect the input end of the overflow valve 14, the output end of the third one-way valve 15 and the output end of the second two-position two-way valve 16, the first variable pump 12 and the second variable pump 13 are connected coaxially, and the first variable pump 12 and the second variable pump 13 are connected with the second oil tank 6-2, the output end of the overflow valve 14 is connected with the third oil tank 6-3, and the input end of the second two-position two-way valve 16 is connected with the third one-way valve 15 The input terminal and the accumulator 17;

The main reversing valve 1, the confluence valve 2, the floating valve 4, the main winch motor 7, the first two-position two-way valve 11, the first variable pump 12, the second variable pump 13 and the second two-position two-way valve 16 are all A controller 10 is connected.

The working process of the present utility model is as follows:

Assuming that the motor steering direction is positive during the lifting condition, and the accumulator releases energy during the lifting condition, the controller 10 energizes the electromagnets of the confluence valve 2 and the first two-position two-way valve 11 through the electrical system, and the main commutation Valve 1 and the second two-position two-way valve 16 are not energized, the main reversing valve 1 works at the left position, the confluence valve 2 works at the upper position, the first two-position two-way valve 11 works at the upper position, and the second two-position two-way valve 16 works in the lower position, the accumulator 17 releases energy, the oil in the accumulator 17 drives the second variable displacement pump 13 to work in the motor mode, the second variable displacement pump 13 and the first variable displacement pump 12 are coaxially connected, the first variable displacement pump 13 The pump 12 works in the pump mode, supplies oil to the main oil circuit through the first two-position two-way valve 11 and the confluence valve 2, and merges with the main pump to drive the main winch motor 7 to increase the lifting speed and reduce the load on the engine. When the drill pipe and drilling tools are hoisted, the oil flow path: accumulator 17 → one-way valve 15 → the second variable pump 13 works under the motor condition → the first variable pump 12 works under the pump condition → the first two The upper position of the two-way valve 11 → the upper position of the confluence valve 2, the main pump oil circuit passes through the left position of the main reversing valve 1 and merges with the accumulator oil at point A to jointly drive the main winch motor 7.

When the drill pipe and drilling tools are falling, the controller 10 controls the electromagnet of the main reversing valve 1 to be energized. In the middle, the inertia of the drill pipe and the drilling tool will drag the main winch motor 7 to accelerate the rotation, and the oil supply speed of the main pump cannot keep up. -1 and the second one-way valve 5-2 give it oil replenishment, the right side enters oil, and the left side leaves oil. The controller 10 controls the confluence valve 2 to be de-energized, the confluence valve 2 works in the lower position, the first 2-position 2-way reversing valve 11 and the second 2-position 2-way valve 16 are energized, work in the upper position, and the accumulator 17 is charged The oil flow path is as follows: oil tank 6→first check valve 5-1 and first check valve 5-2→right side of main winch motor 7→left side of main winch motor 7→shuttle valve 3→first 2-position 2-way valve 11 upper position→first variable pump 12 works in motor working condition→second variable pump 13 works in pump working condition→second 2-position 2-way valve 16 upper position→accumulator 17. When the main winch is lowered, the accumulator is charged, and the gravitational potential energy is converted into hydraulic energy and stored in the accumulator. When the hoist is lifted, the accumulator releases this part of energy, realizing the energy reuse.

When the drill pipe and drilling tools are drilled, the main winch motor 7 must float. The realization of the floating function of the utility model is: the controller 10 controls the floating valve 3 to be powered off, the valve works in the upper position, and the left and right sides of the main winch motor 7 Connected directly, the motor floats.

Claims (3)

1. a rotary drilling rig master winch hydraulic system, it is characterized in that: the main reversing valve (1) comprising access main pump P mouth and main pump S mouth, two output terminals of main reversing valve (1) connect the two ends of main winch motor (7), main winch motor (7) is parallel with floating valve (4), shuttle valve (3) and converging valve (2), the input end of converging valve (2) connects the output terminal of shuttle valve (3) and the input end of an input end and floating valve (4) and the output terminal of the second one-way valve (5-2), the output terminal of converging valve (2) connects another input end of shuttle valve (3), the output terminal of floating valve (4) and the output terminal of the first one-way valve (5-1), first one-way valve (5-1) is all connected the first fuel tank (6-1) with the input end of the second one-way valve (5-2), main winch motor (7) is also connected with load (8) and brake cylinder (9),

The input end of described converging valve (2) is also connected with the output terminal of the first two position two-way valve (11), the input end of the first two position two-way valve (11) is connected the output terminal of the 3rd one-way valve (15) and the output terminal of the second two position two-way valve (16) by the first variable displacement pump (12) with the second variable displacement pump (13), first variable displacement pump (12) is coaxially connected with the second variable displacement pump (13), the second fuel tank (6-2) is connected with between the first variable displacement pump (12) and the second variable displacement pump (13), the input end of the second two position two-way valve (16) connects input end and the accumulator (17) of the 3rd one-way valve (15),

Described main reversing valve (1), converging valve (2), floating valve (4), main winch motor (7), the first two position two-way valve (11), the first variable displacement pump (12), the second variable displacement pump (13) and the second two position two-way valve (16) are all connected with controller (10).

2. a kind of rotary drilling rig master winch hydraulic system according to claim 1, it is characterized in that: described second variable displacement pump (13) connects the input end of relief valve (14), the output terminal of relief valve (14) connects the 3rd fuel tank (6-3).

3. a kind of rotary drilling rig master winch hydraulic system according to claim 1, is characterized in that: described brake cylinder (9) connects pioneer pump P mouth and pioneer pump S mouth.