CN112777558B - Oil pumping device - Google Patents

Abstract

The application provides an oil pumping device, and belongs to the technical field of oil filling. The oil pumping device comprises a pumping device, a reversing device, a first pipe, a second pipe and a filtering device. The reversing device has a first working state and a second working state; the first pipe and the second pipe are both connected to the reversing device; the filter device may be selectively connected to the free end of the first tube or the free end of the second tube. When the reversing device is in a first working state and the filtering device is connected to the free end of the first pipe, the pumping device can enable oil to enter the first pipe through the filtering device and be discharged from the second pipe; when the reversing device is in the second working state and the filtering device is connected to the free end of the second pipe, the pumping device can enable oil to enter the second pipe through the filtering device and be discharged from the first pipe. Can switch oil feed oil circuit and oil circuit that produces oil through the switching-over device to guarantee that the position that need not to change first pipe and second pipe then can realize reverse oil pumping, improved work efficiency.

Description

Oil pumping device

Technical Field

The application relates to the technical field of oil filling, in particular to an oil pumping device.

Background

At present, generally, an oil pumping device is used for pumping oil to oil tanks of equipment for refueling, the existing oil pumping device generally comprises an oil inlet pipe, an oil outlet pipe and a pumping device, when the oil is refueled, the oil inlet pipe is connected with oil storage equipment, the oil outlet pipe is connected with an oil tank of the equipment needing refueling, and the pumping device works to pump the oil in the oil storage equipment into the oil tanks, so that the purpose of refueling is achieved. When the oil tank of equipment needs the maintenance, then need with the reverse suction of fluid in the oil tank to the oil storage equipment in, because the distance between the oil tank of equipment and the oil storage equipment is longer, then need exchange the position of advancing oil pipe and play oil pipe, the operation is very troublesome.

Disclosure of Invention

The embodiment of the application provides an oil pumping device to improve the problem that the operation is very troublesome when the reverse oil pumping of current oil pumping device.

In a first aspect, an embodiment of the present application provides an oil pumping device, which includes a pumping device, a reversing device, a first pipe, a second pipe, and a filtering device;

the reversing device is connected with the pumping device and has a first working state and a second working state; the first pipe is connected with the reversing device; the second pipe is connected with the reversing device; the filter device can be selectively connected to the free end of the first pipe or the free end of the second pipe;

when the reversing device is in a first working state and the filtering device is connected to the free end of the first pipe, the pumping device can enable oil to enter the first pipe through the filtering device and be discharged from the second pipe; when the reversing device is in the second working state and the filtering device is connected to the free end of the second pipe, the pumping device can enable oil to enter the second pipe through the filtering device and be discharged from the first pipe.

In the scheme, the reversing device is connected with the pumping device, the first pipe and the second pipe are connected with the reversing device, the oil inlet oil way and the oil outlet oil way can be switched through the reversing device, and therefore reverse oil pumping can be achieved without changing the positions of the first pipe and the second pipe, and working efficiency is improved. In addition, if the first pipe is an oil inlet pipe, the filter device may be mounted to a free end of the first pipe; if the second tube is an oil inlet tube, the filter device may be mounted to the free end of the second tube. The filtering device can filter out impurities in oil, and hard impurities are prevented from entering the pumping device and damaging the pumping device.

In some embodiments, the filter device comprises a valve body, a filter cover and a one-way conduction mechanism; the valve body is provided with a connecting port which is used for being selectively communicated with the first pipe or the second pipe; the filter cover is connected with the valve body and is provided with filter holes; the one-way conduction mechanism is arranged in the valve body, can allow oil to flow into the connecting port through the filter hole and can prevent the oil from flowing into the filter hole through the connecting port.

In the above scheme, the unidirectional conduction mechanism in the filtering device can allow oil to flow into the connecting port through the filtering hole and prevent the oil from flowing into the filtering hole through the connecting port, that is, the filtering device is in a unidirectional conduction structure. If filter equipment connects in the free end of first pipe, pumping installations work back, and fluid accessible filter equipment gets into first pipe, and pumping installations stops the back, and then the fluid in first pipe is unable discharges through filter equipment, avoids getting into the fluid in first pipe and spills and cause on-the-spot pollution and fluid extravagant.

In some embodiments, the filter device further comprises a connecting piece, and the valve body is connected with the filter cover through the connecting piece; the connecting piece and the valve body jointly define a first accommodating space communicated with the connecting port; the connecting piece and the filter cover jointly define a second accommodating space communicated with the filter hole; the connecting piece is provided with a connecting hole for communicating the first accommodating space with the second accommodating space; the one-way conduction mechanism is positioned in the first accommodating space and has an opening state for opening the connecting hole and a closing state for closing the connecting hole; when the one-way conduction mechanism is in the closed state, the one-way conduction mechanism closes the connecting hole so as to disconnect the first accommodating space from the second accommodating space; when the oil liquid flows into the second accommodating space from the filter hole, the one-way conduction mechanism opens the connecting hole under the pressure action of the oil liquid, and the one-way conduction mechanism is switched from the closed state to the open state, so that the first accommodating space is communicated with the second accommodating space.

In the above scheme, the one-way conduction mechanism realizes the connection or disconnection of the first accommodating space and the second accommodating space by opening or closing the connecting hole on the connecting piece, so that the connection or disconnection of the filter hole and the connecting port is realized, and the connection or disconnection of the filter device is realized. The structure is simple in implementation mode and easy to implement.

In some embodiments, the one-way conduction mechanism comprises a movable shaft, a check retainer ring and an elastic piece; the movable shaft is axially and movably arranged in the valve body, the check ring is arranged in the movable shaft, and the elastic part is used for providing elastic force for the movable shaft so that the check ring is closed to the connecting hole.

In the above scheme, the elastic element is used for providing elastic force for the movable shaft, so that the check retainer ring closes the connecting hole, that is, in a normal state, the one-way conduction mechanism is in a closed state, and the one-way conduction mechanism can prevent oil from flowing into the filter hole through the connecting port; when the pumping device works to enable oil to flow into the second accommodating space from the filter hole, the check retaining ring overcomes the elastic force of the elastic piece to move under the pressure action of the oil, so that the connecting hole is opened, the one-way conduction mechanism is switched from the closed state to the open state, and the oil flows into the connecting port through the filter hole.

In some embodiments, a fixed plate is arranged in the valve body, and a guide hole and a flow guide hole are arranged on the fixed plate; the movable shaft is movably inserted into the guide hole, and the elastic piece acts between the movable shaft and the fixed plate.

In the above scheme, the guide hole on the fixed plate plays a good guiding role in the movement of the movable shaft, and the stability of the movable shaft in the moving process is improved. In addition, the setting of water conservancy diversion hole on the fixed plate can guarantee to get into the fluid in the first accommodation space smoothly from the second accommodation space and enter into the connector.

In some embodiments, the filtering apparatus further includes a magnetic rod connected to the one-way conduction mechanism, and the magnetic rod extends into the second receiving space through the connection hole.

In the above scheme, the bar magnet can adsorb the tiny metal particle that enters into the fluid in the second accommodation space through the filtration pore of filter mantle, reaches the effect of secondary purification fluid.

In some embodiments, the magnetic rod is provided with a shielding ring, the shielding ring is fixed on the magnetic rod, and a flow guide channel is formed inside the magnetic rod; when the one-way conduction mechanism is in the opening state, the blocking ring closes the connecting hole, and the first accommodating space is communicated with the second accommodating space through the flow guide channel.

In the above scheme, be equipped with on the bar magnet and hide the retaining ring, hide the retaining ring and can close the connecting hole when one-way conduction mechanism is in the open mode for first accommodation space and second accommodation space pass through the inside water conservancy diversion passageway intercommunication of bar magnet, make the interior fluid that enters into the second accommodation space through the filtration pore of filter mantle can only need flow into to first accommodation space through the inside of bar magnet, make the absorption of bar magnet to the little metal particle in the fluid more thorough.

In some embodiments, the oil well pumping apparatus further comprises a transfer cart, and the pumping apparatus and the reversing apparatus are both mounted on the transfer cart.

In the scheme, the oil pumping device further comprises a transfer trolley, so that the whole oil pumping device can be transferred conveniently.

In some embodiments, the pumping device comprises a pump and a motor coupled to the pump, the motor for powering the pump; the oil pumping device further comprises a storage battery, the storage battery is electrically connected with the motor, and the storage battery is used for providing electric energy for the motor.

In the above scheme, oil pumping device still includes the battery, and the battery can be for the motor power supply in order to drive pump work, need not external power supply, and application scope is wider.

In some embodiments, the oil well pumping apparatus further comprises a voltage regulator and a reverse-connection protection device; the voltage regulator is used for regulating the voltage of the motor; the reverse connection protection device is configured to make the motor turn the same when the storage battery is connected in the positive direction and connected in the reverse direction.

In the scheme, the voltage of the motor can be adjusted through the voltage regulator, the rotating speed of the pump is controlled to achieve the purpose of controlling the flow, the oil quantity can be controlled according to the requirement of the field pumping target oil level even if the oil quantity stops, and the overflow is avoided. Due to the arrangement of the reverse connection protection device, the rotation direction of the storage battery positive wiring motor is the same as that of the storage battery reverse wiring motor, so that the positive and negative electrodes of the storage battery are not changed in connection no matter the storage battery is in positive wiring or reverse wiring.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic view of an oil well pumping apparatus (a filter apparatus attached to the free end of a first pipe) according to some embodiments of the present application;

FIG. 2 is a schematic view of an oil well pumping apparatus (a filter apparatus attached to the free end of a second pipe) according to some embodiments of the present application;

FIG. 3 is a front view of an oil well pumping apparatus according to some embodiments of the present application;

FIG. 4 is a top view of an oil well pumping apparatus according to some embodiments of the present application;

FIG. 5 is a schematic structural view of a filter device according to some embodiments of the present disclosure;

FIG. 6 is a schematic structural view of the fixing plate shown in FIG. 5;

fig. 7 is a schematic structural diagram of a filtering apparatus according to still other embodiments of the present application.

An icon: 100-oil pumping device; 10-a pumping device; 11-a pump; 12-a motor; 20-a reversing device; 30-a first tube; 40-a second tube; 50-a filtration device; 51-a valve body; 511-connection port; 52-a filter housing; 521-filter holes; 53-unidirectional conduction mechanism; 531-a movable shaft; 5311-a head; 5312-a first shaft section; 5313-a second shaft section; 532-check retaining ring; 533-an elastic member; 534-nut; 535-washer; 54-a connector; 541-a connection hole; 55-a first accommodation space; 56-a second receiving space; 57-fixing plate; 571-a guide hole; 572-flow guide holes; 58-magnetic bar; 581-cover the retaining ring; 582-a flow guide channel; 59-a connecting shaft; 60-a storage battery; 70-a voltage regulator; 80-reverse connection protection device; 81-diode; 90-transfer vehicle; 91-a frame; 92-a wheel; 93-handle holder.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the prior art, when oil is added into an oil tank of equipment (such as a steam turbine), an oil inlet pipe in an oil pumping device is connected with oil storage equipment (such as an oil storage tank), and an oil outlet pipe in the oil pumping device is connected with the oil tank of the equipment; when the oil tank of equipment needs the maintenance, then need with the reverse suction of fluid in the oil tank to the oil storage equipment in, because the distance between the oil tank of equipment and the oil storage equipment is longer, then need advance oil pipe and go out the position of oil pipe and exchange, the operation is very troublesome.

In view of this, as shown in fig. 1 and fig. 2, the present embodiment provides an oil pumping device 100, which includes a pumping device 10, a reversing device 20, a first pipe 30, a second pipe 40, and a filtering device 50.

The reversing device 20 is connected with the pumping device 10, and the reversing device 20 has a first working state and a second working state; the first pipe 30 and the second pipe 40 are both connected to the reversing device 20; the filter device 50 may be selectively connected to the free end of the first tube 30 or the free end of the second tube 40.

When the reversing device 20 is in the first working state and the filter device 50 is connected to the free end of the first pipe 30, the pumping device 10 enables oil to enter the first pipe 30 through the filter device 50 and to be discharged from the second pipe 40; when the reversing device 20 is in the second operating condition and the filter device 50 is connected to the free end of the second pipe 40, the pumping device 10 enables oil to enter the second pipe 40 through the filter device 50 and to be discharged from the first pipe 30.

The oil pumping device 100 can realize reverse oil pumping without changing the positions of the first pipe 30 and the second pipe 40, thereby improving the working efficiency. Further, if the first pipe 30 is an oil inlet pipe, the filter device 50 may be installed at a free end of the first pipe 30; if the second pipe 40 is an oil inlet pipe, the filter device 50 may be installed at a free end of the second pipe 40. The filtering device 50 can filter out impurities in the oil liquid, and prevent hard impurities from entering the pumping device 10 and damaging the pumping device 10.

As shown in fig. 1, when oil is filled into an oil tank (not shown in fig. 1) of the equipment, the first pipe 30 may be connected to the oil storage equipment (not shown in fig. 1), the filtering device 50 is connected to a free end of the first pipe 30, the second pipe 40 is connected to the oil tank, the reversing device 20 is switched to the first working state, after the pumping device 10 works, oil in the oil storage equipment enters the first pipe 30 after being filtered by the filtering device 50, and is finally discharged into the oil tank through the second pipe 40, so as to fill the oil tank of the equipment with oil; as shown in fig. 2, when oil in the oil tank (not shown in fig. 2) needs to be pumped back to the oil storage device (not shown in fig. 2), the positions of the first pipe 30 and the second pipe 40 do not need to be changed, the first pipe 30 is still connected with the oil storage device, the second pipe 40 is still connected with the oil tank, the filtering device 50 is detached from the first pipe 30 and is installed at the free end of the second pipe 40, the reversing device 20 is switched to the second working state, after the pumping device 10 works, the oil in the oil tank is filtered by the filtering device 50, enters the second pipe 40, and is finally discharged into the oil storage device through the first pipe 30, and oil discharge to the oil tank is realized.

In some embodiments, the pumping device 10 includes a pump 11 and a motor 12, the motor 12 being coupled to the pump 11, the motor 12 being configured to power the pump 11. The liquid inlet and the liquid outlet of the pump 11 are connected with the reversing device 20 through pipelines. When the motor 12 is powered on, the motor 12 drives the pump 11 to work.

Illustratively, the pump 11 and the motor 12 form a direct-current oil well pump, which can be a model number LK-70-24DC direct-current oil well pump, with a head of 10-20m, a power of 180W, a suction head of 3-9m, and a flow rate of 70L/min.

In some embodiments, the oil pumping device 100 further comprises a battery 60, the battery 60 is electrically connected to the motor 12, and the battery 60 is used for providing electric power for the motor 12. The storage battery 60 can supply power to the motor 12 to drive the pump 11 to work, an external power supply is not needed, and the application range is wider.

Optionally, the positive electrode and the negative electrode of the motor 12 are externally connected with power lines, the power lines can be connected with conductive clips, and the two conductive clips are respectively clamped on the positive electrode and the negative electrode of the storage battery 60, so that the motor 12 can be electrically connected with the battery.

Illustratively, the storage battery 60 is a direct current power supply, and the storage battery 60 can be formed by connecting two 12V batteries 24Ah in series and can be used for long-time oil pumping of a direct current oil well pump.

In some embodiments, the oil well pumping apparatus 100 further includes a voltage regulator 70 and a reverse-connect protection device 80. The voltage regulator 70 is used to regulate the voltage of the motor 12. The reverse connection protection device 80 is configured to make the motor 12 turn the same when the battery 60 is connected in the forward direction and the reverse direction.

The voltage of the motor 12 can be adjusted by the voltage regulator 70, the rotating speed of the pump 11 is controlled to achieve the purpose of controlling the flow, and the oil quantity can be controlled to stop immediately according to the requirement of the field pumping target oil level, so that overflow is avoided. Due to the reverse connection protection device 80, the rotation direction of the motor 12 with the positive connection wire of the storage battery 60 is the same as the rotation direction of the motor 12 with the reverse connection wire of the storage battery 60, so that the motor 12 ensures that the connection of the positive electrode and the negative electrode is not changed no matter the storage battery 60 is in the positive connection wire or in the reverse connection wire.

The voltage regulator 70 is illustratively a dc voltage regulator, which is connected in series in the circuit formed by the electric machine 12 and the battery 60. The reverse connection protection device 80 adopts four voltage stabilizing diodes 81 to form a bridge rectification mode and then is connected into a circuit.

In some embodiments, the reversing device 20 is a two-position, four-way reversing valve. By moving the spool of the directional valve, the directional valve can be switched between the first operating state and the second operating state. The valve core of the reversing valve has two positions, and when the valve core of the reversing valve is positioned at one position, the reversing valve is positioned in a first working state; when the valve core of the reversing valve is located at another position, the reversing valve is located in a second working state.

In some embodiments, as shown in fig. 3 and 4, the oil pumping device 100 further comprises a transfer cart 90, and the pumping device 10, the reversing device 20, the accumulator 60, the voltage regulator 70 and the reverse connection protection device 80 are all mounted on the transfer cart 90. The transfer cart 90 is provided to facilitate the transfer of the entire pumping unit 100.

Alternatively, the transfer cart 90 includes a frame 91, wheels 92, and a handle frame 93, the wheels 92 are provided at the bottom of the frame 91, the handle frame 93 is obliquely disposed at the front side of the frame 91, the pumping device 10, the reversing device 20, and the storage battery 60 are all mounted on the frame 91, and the voltage regulator 70 and the reverse connection protection device 80 are all mounted on the handle frame 93. In actual use, the operator can move the entire cart 90 by applying a pulling or pushing force to the handle frame 93.

Illustratively, the wheels 92 are universal wheels.

In some embodiments, as shown in fig. 5, the filter device 50 includes a valve body 51, a filter cage 52, and a one-way communication mechanism 53; the valve body 51 has a connection port 511, the connection port 511 being for selectively communicating with the first pipe 30 or the second pipe 40; the filter cover 52 is connected to the valve body 51, and the filter cover 52 is provided with a filter hole 521; the unidirectional flux mechanism 53 is provided in the valve body 51, and the unidirectional flux mechanism 53 allows the oil fluid to flow into the connection port 511 through the filter hole 521 and prevents the oil fluid from flowing into the filter hole 521 through the connection port 511.

The unidirectional flux mechanism 53 of the filter device 50 is capable of allowing the oil to flow into the connection port 511 through the filter hole 521 and preventing the oil from flowing into the filter hole 521 through the connection port 511, that is, the filter device 50 has a unidirectional flux structure. If the filtering device 50 is connected to the free end of the first pipe 30, after the pumping device 10 works, the oil can enter the first pipe 30 through the filtering device 50, and after the pumping device 10 stops, the oil in the first pipe 30 cannot be discharged through the filtering device 50, so that the on-site pollution and the oil waste caused by the leakage of the oil entering the first pipe 30 are avoided.

The connection port 511 may be a threaded hole provided on the valve body 51, and both the free end of the first pipe 30 and the free end of the second pipe 40 may be provided with external threads for matching with the threaded hole. When the first pipe 30 is connected to the filter device 50, the free end of the first pipe 30 is directly screwed into the threaded hole; when the second tube 40 is coupled to the filter device 50, the free end of the second tube 40 is directly threaded into the threaded bore.

Optionally, the filter device 50 further comprises a connector 54, and the valve body 51 and the filter cover 52 are connected through the connector 54; the connecting member 54 defines a first accommodation space 55 communicating with the connection port 511 together with the valve body 51; the connector 54 and the filter housing 52 together define a second receiving space 56 communicating with the filter hole 521; the connecting member 54 is provided with a connecting hole 541 for communicating the first accommodating space 55 with the second accommodating space 56; the one-way conduction mechanism 53 is located in the first accommodation space 55, the one-way conduction mechanism 53 having an open state of opening the connection hole 541 and a closed state of closing the connection hole 541; when the one-way conduction mechanism 53 is in the off state, the one-way conduction mechanism 53 closes the connection hole 541 to disconnect the first accommodation space 55 from the second accommodation space 56; when the oil flows into the second accommodating space 56 from the filter hole 521, the one-way conduction mechanism 53 opens the connection hole 541 by the pressure of the oil, and the one-way conduction mechanism 53 is switched from the closed state to the open state to communicate the first accommodating space 55 with the second accommodating space 56.

The one-way conduction mechanism 53 realizes the connection or disconnection between the first accommodating space 55 and the second accommodating space 56 by opening or closing the connection hole 541 on the connection member 54, thereby realizing the connection or disconnection between the filter hole 521 and the connection port 511, and further realizing the connection or disconnection of the filter device 50. The structure is simple in implementation mode and easy to implement.

Illustratively, the connecting member 54 has a ring-shaped structure, and the connection hole 541 is disposed at a central position of the connecting member 54. The valve body 51 is a cylindrical shell, an internal thread is arranged at one end of the valve body 51 far away from the connecting port 511, an external thread matched with the internal thread is arranged on the connecting piece 54, and the connecting piece 54 is screwed in the valve body 51. The filter cover 52 is a cylinder structure with an open top end, the top end of the filter cover 52 is screwed with the connecting piece 54, and the side wall and the bottom wall of the filter cover 52 are both provided with filter holes 521. The valve body 51, the connecting piece 54 and the filter cover 52 are coaxially arranged.

Optionally, the one-way conduction mechanism 53 includes a movable shaft 531, a check collar 532, and an elastic member 533; the movable shaft 531 is axially movably disposed in the valve body 51, the check ring 532 is mounted on the movable shaft 531, and the elastic member 533 is configured to provide an elastic force to the movable shaft 531, so that the check ring 532 closes the connection hole 541.

The elastic member 533 is configured to provide an elastic force to the movable shaft 531, so that the check retaining ring 532 closes the connection hole 541, that is, in a normal state, the one-way conduction mechanism 53 is in a closed state, and the one-way conduction mechanism 53 can prevent the oil from flowing into the filtering hole 521 through the connection port 511; when the pumping device 10 operates to cause the oil to flow into the second accommodating space 56 from the filtering hole 521, the check ring 532 moves against the elastic force of the elastic member 533 under the pressure of the oil, so as to open the connection hole 541, and the one-way conduction mechanism 53 is switched from the closed state to the open state, so that the oil flows into the connection port 511.

Illustratively, the movable shaft 531 includes a head 5311, a first shaft section 5312, and a second shaft section 5313 coaxially arranged, the head 5311 and the second shaft section 5313 are connected by the first shaft section 5312, the head 5311 has a diameter greater than a diameter of the first shaft section 5312, and the first shaft section 5312 has a diameter greater than a diameter of the second shaft section 5313. Wherein the first shaft section 5312 is provided with an external thread.

The check washer 532 has a central bore with an inner diameter that matches the diameter of the first shaft section 5312. The first shaft section 5312 penetrates through a central hole of the check retaining ring 532, a nut 534 is screwed on the first shaft section 5312, and the nut 534 and the head 5311 are matched to clamp the check retaining ring 532 so as to fix the check retaining ring 532 on the movable shaft 531. Of course, a washer 535 may be provided between the nut 534 and the check washer 532.

Furthermore, a fixing plate 57 is arranged in the valve body 51, and a guide hole 571 and a flow guide hole 572 are arranged on the fixing plate 57; the movable shaft 531 is movably inserted into the guide hole 571, and the elastic member 533 acts between the movable shaft 531 and the fixed plate 57.

The guide holes 571 in the fixing plate 57 provide good guiding for the movement of the movable shaft 531, thereby improving the stability of the movable shaft 531 during the movement. The guide holes 572 in the fixing plate 57 ensure that the oil introduced into the first accommodation space 55 from the second accommodation space 56 can smoothly enter the connection port 511.

For example, as shown in fig. 6, the fixing plate 57 is a circular plate, the guide hole 571 is disposed at the center of the fixing plate 57, and the inner diameter of the guide hole 571 matches the diameter of the second shaft section 5313 of the movable shaft 531; the plurality of guide holes 572 are evenly distributed circumferentially around the guide hole 571.

With continued reference to fig. 5, the fixing plate 57 is screwed into the valve body 51, and the second shaft section 5313 of the movable shaft 531 is movably inserted into the guide hole 571 of the fixing plate 57. The elastic member 533 is sleeved outside the second shaft section 5313, and two ends of the elastic member 533 respectively abut against the fixing plate 57 and the first shaft section 5312. Illustratively, the elastic member 533 is a spring.

In some embodiments, with continued reference to fig. 5, the filter device 50 further includes a magnetic rod 58, the magnetic rod 58 is connected to the one-way conduction mechanism 53, and the magnetic rod 58 extends into the second accommodation space 56 through the connection hole 541.

The magnetic bar 58 can adsorb small metal particles in the oil liquid entering the second accommodating space 56 through the filter holes 521 of the filter cover 52, so that the effect of secondary oil liquid purification is achieved.

Illustratively, the magnetic bar 58 is a cylindrical structure made of magnets.

Illustratively, the magnetic bar 58 is connected with the movable shaft 531 of the one-way conduction mechanism 53. Specifically, the magnetic bar 58 is connected with the movable shaft 531 through a connecting shaft 59, the connecting shaft 59 is screwed on the movable shaft 531, a mounting hole is formed in the top end of the magnetic bar 58, the connecting shaft 59 is inserted into the mounting hole, and the connecting shaft 59 and the mounting hole form interference fit. Of course, the mounting hole may be a threaded hole, and the connecting shaft 59 is screwed into the mounting hole.

In some embodiments, as shown in fig. 7, a shielding ring 581 is disposed on the magnetic rod 58, the shielding ring 581 is fixed to the magnetic rod 58, and a flow guiding channel 582 is formed inside the magnetic rod 58; when the one-way conduction mechanism 53 is in the open state, the blocking ring 581 closes the connection hole 541, and the first accommodation space 55 and the second accommodation space 56 are communicated through the flow guide passage 582.

The blocking ring 581 can close the connection hole 541 when the one-way conduction mechanism 53 is in an open state, so that the first accommodation space 55 is communicated with the second accommodation space 56 through the flow guide channel 582 inside the magnetic rod 58, and oil liquid entering the second accommodation space 56 through the filtering hole 521 of the filter 52 can only flow into the first accommodation space 55 through the inside of the magnetic rod 58, so that the magnetic rod 58 can more thoroughly adsorb small metal particles in the oil liquid.

One end of the flow guide channel 582 penetrates the bottom end of the magnetic rod 58, and the other end of the flow guide channel 582 penetrates the peripheral wall of the magnetic rod 58. The shielding rings 581 and the check rings 532 are respectively located on both sides of the connecting member 54 in the axial direction. When the non-return retainer 532 closes the connecting hole 541, the non-return retainer 532 blocks one axial end of the connecting hole 541; when the blocking ring 581 closes the connection hole 541, the blocking ring 581 blocks the other axial end of the connection hole 541. The flow guide channel 582 penetrates the circumferential wall of the magnetic rod 58 and is located between the shielding ring 581 and the non-return ring 532.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.

The above embodiments are merely for illustrating the technical solutions of the present application and are not intended to limit the present application, and those skilled in the art can make various modifications and variations of the present application. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (6)

1. An oil well pumping apparatus, comprising:

a pumping device;

the reversing device is connected with the pumping device, has a first working state and a second working state, and is a two-position four-way reversing valve;

the first pipe is connected to the reversing device;

the second pipe is connected with the reversing device; and

a filter means selectively connectable to the free end of the first tube or the free end of the second tube;

when the reversing device is in a first working state and the filtering device is connected to the free end of the first pipe, the pumping device can enable oil to enter the first pipe through the filtering device and to be discharged from the second pipe;

when the reversing device is in the second working state and the filtering device is connected to the free end of the second pipe, the pumping device can enable oil to enter the second pipe through the filtering device and be discharged from the first pipe:

the filtering device comprises a valve body, a filtering cover and a one-way conduction mechanism; the valve body is provided with a connecting port which is used for being selectively communicated with the first pipe or the second pipe; the filter cover is connected with the valve body and is provided with filter holes; the one-way conduction mechanism is arranged in the valve body, can allow oil to flow into the connecting port through the filter hole and can prevent the oil from flowing into the filter hole through the connecting port;

the filtering device also comprises a connecting piece, and the valve body is connected with the filtering cover through the connecting piece; the connecting piece and the valve body jointly define a first accommodating space communicated with the connecting port; the connecting piece and the filter cover jointly define a second accommodating space communicated with the filter hole; the connecting piece is provided with a connecting hole for communicating the first accommodating space with the second accommodating space; the one-way conduction mechanism is positioned in the first accommodating space and has an opening state for opening the connecting hole and a closing state for closing the connecting hole; when the one-way conduction mechanism is in the closed state, the one-way conduction mechanism closes the connecting hole so as to disconnect the first accommodating space from the second accommodating space; when the oil liquid flows into the second accommodating space from the filter hole, the one-way conduction mechanism opens the connecting hole under the pressure action of the oil liquid, and the one-way conduction mechanism is switched from the closed state to the open state, so that the first accommodating space is communicated with the second accommodating space;

the filtering device further comprises a magnetic rod, the magnetic rod is connected to the one-way conduction mechanism, and the magnetic rod penetrates through the connecting hole and extends into the second accommodating space; the shielding ring is arranged on the magnetic rod and fixed on the magnetic rod, and a flow guide channel is formed in the magnetic rod; when the one-way conduction mechanism is in the opening state, the blocking ring closes the connecting hole, and the first accommodating space is communicated with the second accommodating space through the flow guide channel.

2. The oil well pumping apparatus of claim 1, wherein the one-way conduction mechanism comprises a movable shaft, a check ring and an elastic member;

the movable shaft is axially and movably arranged in the valve body, the check ring is arranged in the movable shaft, and the elastic part is used for providing elastic force for the movable shaft so that the check ring is closed to the connecting hole.

3. The oil pumping device of claim 2, wherein a fixed plate is disposed in the valve body, and a guide hole are disposed in the fixed plate;

the movable shaft is movably inserted in the guide hole, and the elastic piece acts between the movable shaft and the fixed plate.

4. The oil well pumping apparatus of any of claims 1-3, wherein the oil well pumping apparatus further comprises a trolley;

the pumping device and the reversing device are both arranged on the conveying vehicle.

5. An oil well pumping apparatus according to any of claims 1 to 3, wherein the pumping apparatus comprises a pump and a motor;

the motor is connected with the pump and used for providing power for the pump;

the oil pumping device further comprises a storage battery, the storage battery is electrically connected with the motor, and the storage battery is used for providing electric energy for the motor.

6. The oil well pumping apparatus of claim 5, further comprising a voltage regulator and a reverse-connect protection device;

the voltage regulator is used for regulating the voltage of the motor;

the reverse connection protection device is configured to make the motor turn the same when the storage battery is connected in the positive direction and connected in the reverse direction.

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