CN204299985U - Hydraulic variable flow controls oil pumper - Google Patents

Abstract

The utility model discloses a hydraulic variable control pumping unit, which comprises an oil pumping device, a hydraulic cylinder, a hydraulic pump group, a variable hydraulic pump, a motor, a hydraulic variable mechanism, an electromagnetic reversing valve, a hydraulic variable pump and a hydraulic cylinder with a rod The cavity and pipeline are connected, and the hydraulic variable pump is connected with: an energy storage device that absorbs energy during the descent of the oil pumping device and releases energy during the rising process of the oil pumping device. A proximity switch that moves the pole signal up and down to control the reversing of the electromagnetic reversing valve. The utility model arranges an energy storage device in the hydraulic system, utilizes the gravitational effect of the energy storage device when the oil pumping device descends to absorb and store energy, and cooperates with the motor to jointly drive the hydraulic variable pump when the oil pumping device rises, so that the pumping When the oil device is lowered, the high-pressure energy generated by compressing the hydraulic oil under its own gravity can be effectively utilized, achieving the purpose of saving energy, reducing consumption, and reducing equipment use costs.

Description

Hydraulic variable control pumping unit

technical field

The utility model relates to a hydraulic variable control pumping unit.

Background technique

The pumping unit of the pumping unit is controlled by the hydraulic system to push the action cylinder, which drives the pumping device to move up and down to extract underground crude oil. The rise of the oil pumping device relies on the action of the oil cylinder, while the descent mainly relies on its own gravity. In the existing hydraulic system, the variable pump that drives the action of the oil cylinder is mainly driven by the motor. The high-pressure energy generated by the hydraulic oil has not been effectively utilized, resulting in a waste of this part of energy, which is not conducive to saving energy and reducing consumption and reducing equipment use costs.

Utility model content

The technical problem to be solved by the utility model is: to overcome the deficiencies in the prior art, to provide a hydraulic variable control pumping unit, which can store high-pressure energy during the descending process of the pumping device, and release the energy when the pumping device rises. The high-pressure energy pushes the pumping unit up to save energy and reduce costs.

The technical scheme adopted by the utility model to solve the technical problem is: a hydraulic variable control pumping unit, including an oil pumping device for lifting and lowering to extract crude oil, a hydraulic cylinder for pushing the oil pumping device to move, and a hydraulic cylinder for controlling the action of the hydraulic cylinder. system, the hydraulic system has a hydraulic pump group, a variable hydraulic pump, a motor that drives the hydraulic variable pump to rotate, and a hydraulic variable mechanism that controls the hydraulic variable pump to change the output direction of hydraulic oil. There is an electromagnetic reversing valve for changing the flow direction of hydraulic oil, and a throttle valve for controlling the speed of the hydraulic variable mechanism is installed on the oil circuit between the electromagnetic reversing valve and the hydraulic variable pump. Connected, the hydraulic variable pump is connected with: an energy storage device that absorbs energy during the descending process of the oil pumping device and releases energy during the rising process of the oil pumping device to promote the movement of the oil pumping device. The proximity switch that controls the reversing of the electromagnetic reversing valve by the pole signal of the pumping unit moving up and down.

Preferably, the energy storage device is a hydraulic accumulator, and the hydraulic accumulator is connected with the hydraulic variable pump pipeline to store the energy generated by gravity when the oil pumping device descends.

Alternatively, the energy storage device is a flywheel, and the flywheel rotates and is installed between the motor and the hydraulic variable pump to store the energy generated by gravity when the pumping device descends.

In order to accurately detect the position of the up-and-down movement pole of the oil pumping device, the proximity switch includes an upper proximity switch for controlling the upper movement pole of the oil pumping device and a lower proximity switch for controlling the lower movement pole of the oil pumping device.

The beneficial effects of the utility model are: the utility model sets an energy storage device in the hydraulic system, utilizes the gravitational effect of the energy storage device generated when the oil pumping device is lowered to absorb and store energy, and cooperates with the motor when the oil pumping device rises. Drive the hydraulic variable pump and push the hydraulic cylinder to move, so that the high-pressure energy generated by compressing the hydraulic oil under its own gravity can be effectively used when the oil pumping device is lowered, achieving the purpose of saving energy, reducing consumption and reducing the cost of equipment use.

Description of drawings

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

Fig. 1 is a schematic structural view of the first embodiment of the utility model.

Fig. 2 is a schematic structural view of the second embodiment of the utility model.

In the figure 1. Oil pumping device 2. Hydraulic cylinder 3. Hydraulic pump group 4. Variable hydraulic pump 5. Motor 6. Hydraulic variable mechanism 7. Electromagnetic reversing valve 8. Throttle valve 9. Hydraulic accumulator 10. Flywheel 11 -1. Upper proximity switch 11-2. Lower proximity switch 12. Relief valve

Detailed ways

The utility model is described further in conjunction with accompanying drawing now. These drawings are simplified schematic diagrams only to illustrate the basic structure of the utility model in a schematic way, so they only show the configurations related to the utility model.

As shown in Figure 1 is a structural schematic diagram of the first embodiment of the present utility model, a hydraulic variable control oil pumping unit, including an oil pumping device 1 for pumping crude oil in up and down movements, and a hydraulic cylinder for pushing the oil pumping device 1 to move 2. The hydraulic system that controls the action of the hydraulic cylinder 2, the oil pumping device 1 is connected with the piston rod extension end of the hydraulic cylinder 2.

The hydraulic system has a hydraulic pump group 3, a variable hydraulic pump 4, a motor 5 that drives the hydraulic variable pump 4 to rotate, and a hydraulic variable mechanism 6 that controls the hydraulic variable pump 4 to change the output direction of hydraulic oil. The oil circuit of the hydraulic pump 4 is provided with an electromagnetic reversing valve 7 for changing the flow direction of the hydraulic oil. The oil circuit between the electromagnetic reversing valve 7 and the hydraulic variable pump 4 is provided with a throttle valve 8 for controlling the speed of the hydraulic variable mechanism 6 . The variable displacement pump 4 communicates with the rod chamber pipeline of the hydraulic cylinder 2 .

The hydraulic variable pump 4 is connected with an energy storage device that absorbs energy during the descending process of the oil pumping device 1 and releases energy during the rising process of the oil pumping device 1 to push the oil pumping device 1 to move. In this embodiment, the preferred energy storage device is Hydraulic accumulator 9, hydraulic accumulator 9 is connected with hydraulic variable pump 4 pipelines to store the energy generated by gravity when the oil pumping device 1 descends.

A proximity switch for controlling the reversing of the electromagnetic reversing valve 7 is provided in the up-and-down trajectory of the oil pumping device 1, and the proximity switch includes an upper proximity switch 11-1 for controlling the upper movement pole of the oil pumping device 1 and controlling the oil pumping device. 1 The lower proximity switch 11-2 of the lower movement pole, the upper proximity switch 11-1, and the lower proximity switch 11-2 send a signal to control the electromagnetic reversing valve 7 to change direction when the oil pumping device 1 moves to the upper and lower poles.

Relief valves 12 are provided on the oil passages where the hydraulic pump group 3 leads to the electromagnetic reversing valve 7 and the variable hydraulic pump 4 communicates with the hydraulic cylinder 2 to protect the working oil passage of the hydraulic system.

The working process is briefly described as follows: the motor 5 starts to drive the variable hydraulic pump 4 to rotate and do work. When the electromagnetic reversing valve 7 is not powered, the hydraulic variable mechanism 6 does not work, the variable hydraulic pump 4 is at zero position, and the hydraulic cylinder 2 and the oil pumping device 1 It is in a stopped state; when the electromagnet at position a on the left side of the electromagnetic reversing valve 7 acts after starting to work, the hydraulic oil of the hydraulic pump group 3 passes through the throttle valve 8 to control the action of the hydraulic variable mechanism 6, so that the variable hydraulic pump 4 outputs in the forward direction Hydraulic oil, the output hydraulic oil enters the rod cavity of the hydraulic cylinder 2, pushes the piston of the hydraulic cylinder 2 to rise, and then the piston rod drives the oil pumping device 1 to rise, when the oil pumping device 1 rises and triggers the upper proximity switch 11-1 , the upper proximity switch 11-1 sends out a signal to control the electromagnetic reversing valve 7 to switch to the action of the b solenoid on the right, and the hydraulic oil of the hydraulic pump group 3 controls the action of the hydraulic variable mechanism 6 through the throttle valve 8, so that the variable hydraulic pump 4 The hydraulic oil is output in the reverse direction, and the oil pumping device 1 is lowered. During the lowering process of the oil pumping device 1, due to its gravity, the piston of the hydraulic cylinder 2 is driven to move down to compress the hydraulic oil. The high-pressure hydraulic oil generated after compression drives the variable hydraulic pump 4, and at the same time the motor 5 also drives the variable hydraulic pump 4. At this time, the hydraulic accumulator 9 absorbs high-pressure oil and stores energy; when the oil pumping device 1 descends and triggers the lower proximity switch 11-2, the upper proximity switch 11-1 sends a signal to control the electromagnetic The reversing valve 7 is switched to the a position electromagnet on the left to act, the hydraulic oil of the hydraulic pump group 3 passes through the throttle valve 8 to control the action of the hydraulic variable mechanism 6, the variable hydraulic pump 4 outputs hydraulic oil in the forward direction again, and the hydraulic accumulator 9 The stored energy cooperates with the motor 5 to jointly drive the variable hydraulic pump 4, and the output hydraulic oil drives the pumping device 1 to rise again through the hydraulic cylinder 2. In this cycle, the pumping device 1 reciprocates up and down through the continuous reversing of the electromagnetic reversing valve 7 Lifting to extract crude oil.

As shown in Figure 2 is a schematic structural diagram of the second embodiment of the present invention, a hydraulic variable control pumping unit, which is different from the first embodiment in that: the energy storage device is a flywheel 10, The flywheel 10 rotates and is arranged between the motor 5 and the hydraulic variable displacement pump 4 to store the energy generated by gravity when the pumping device 1 descends. When the oil pumping device 1 rises, the flywheel 10 synchronous motor 5 rotates, and when the oil pumping device 1 descends, the high-pressure hydraulic oil generated by its gravity pushes the flywheel 10 to accelerate through the hydraulic variable pump 4 to store energy, and the potential energy of the oil pumping device 1 is transformed into The kinetic energy of the flywheel 10, when the pumping device 1 rises again, the kinetic energy stored in the flywheel 10 cooperates with the motor 5 to jointly drive the hydraulic variable pump 4 to output hydraulic oil, and push the piston of the hydraulic cylinder 2 to move upward.

In above-mentioned embodiment, can also make corresponding conversion in structure, can be the form of tension cylinder as the installation form of hydraulic oil cylinder 2, perhaps also can be the form of thrust cylinder; Upper proximity switch 11-1, lower proximity switch 11-2 A displacement sensor capable of setting the upper and lower positions can also be selected; the electromagnetic reversing valve 7 and the throttle valve 8 can use electromagnetic proportional reversing valves to steplessly adjust the variable direction of the hydraulic pump group 3 . The installation form of flywheel 10 is transmission connection, and flywheel 10 can be directly installed on motor 5 afterbody, also can use transmission modes such as electromagnetic coupler, transmission belt, gear set to be connected with hydraulic variable pump 4 and motor 5.

The utility model arranges an energy storage device in the hydraulic system, utilizes the gravitational effect of the energy storage device when the oil pumping device 1 descends to absorb and store energy, and cooperates with the motor 5 to jointly drive the hydraulic variable pump 4 when the oil pumping device 1 rises , to push the hydraulic cylinder 2 to act, so that the high-pressure energy generated by compressing the hydraulic oil under the action of gravity of the oil pumping device 1 can be effectively used when the oil pumping device 1 descends, thereby achieving the purpose of saving energy, reducing consumption, and reducing equipment use costs.

The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present utility model. Equivalent changes or modifications made by the spirit of the present utility model shall be covered within the protection scope of the present utility model.

Claims (4)

1. A hydraulic variable control oil pumping unit, comprising an oil pumping device (1) for pumping crude oil by lifting up and down, a hydraulic cylinder (2) for pushing the oil pumping device (1) to move, and a hydraulic cylinder (2) for controlling the action of the hydraulic cylinder (2). The system is characterized in that: the hydraulic system has a hydraulic pump group (3), a variable hydraulic pump (4), a motor (5) that drives the hydraulic variable pump (4) to rotate, and controls the hydraulic variable pump (4) to convert hydraulic oil The hydraulic variable mechanism (6) in the output direction is provided with an electromagnetic reversing valve (7) for changing the flow direction of the hydraulic oil on the oil path from the hydraulic pump group (3) to the variable hydraulic pump (4), and the electromagnetic reversing valve (7 ) and the hydraulic variable pump (4) are provided with a throttle valve (8) to control the speed of the hydraulic variable mechanism (6), and the hydraulic variable pump (4) communicates with the rod chamber pipeline of the hydraulic cylinder (2) , the hydraulic variable pump (4) is connected with an energy storage device that absorbs energy during the descending process of the oil pumping device (1) and releases energy during the rising process of the oil pumping device (1) to push the oil pumping device (1) to move. The up and down track of the oil device (1) is provided with: a proximity switch that receives the up and down movement pole signal of the oil pumping device (1) and controls the reversing of the electromagnetic reversing valve (7). 2. The hydraulic variable control pumping unit according to claim 1, characterized in that: the energy storage device is a hydraulic accumulator (9), and the hydraulic accumulator (9) is connected to the hydraulic variable pump (4) tube The energy generated by the gravitational push when the storage oil pumping device (1) descends is connected with the road. 3. The hydraulic variable control pumping unit according to claim 1, characterized in that: the energy storage device is a flywheel (10), and the rotation of the flywheel (10) is arranged between the motor (5) and the hydraulic variable pump (4) The energy generated by the gravitational push when the oil pumping device (1) descends is stored. 4. The hydraulic variable control pumping unit according to claim 1, 2 or 3, characterized in that: the proximity switch includes an upper proximity switch (11-1) and Control the lower proximity switch (11-2) of the lower movement pole of the oil pumping device (1).