CN213116269U

CN213116269U - Pumping unit with electric cylinder driving balance weight

Info

Publication number: CN213116269U
Application number: CN202021887556.4U
Authority: CN
Inventors: 曾大勇; 马千水; 郑文照; 吕先明; 徐建新; 张金珉
Original assignee: Shanghai Yingluo Electromechanical Technology Co ltd
Current assignee: Shanghai Yingluo Electromechanical Technology Co ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2021-05-04
Anticipated expiration: 2030-09-02

Abstract

The utility model relates to a beam-pumping unit of electricity jar drive counter weight, including base, support, walking beam, horse head, the horse head is installed in walking beam one end, and the other one end of walking beam still is connected with the back and connects the walking beam, still is equipped with mobilizable balancing weight on the back connects the walking beam, and the walking beam is close to the back and connects walking beam one end still to install the counter weight drive electricity jar of drive balancing weight, and the walking beam is close to the back and connects the walking beam lower extreme of walking beam one end still to be equipped with the drive arrangement who drives the horse head and move from top to bottom. The utility model provides a position of balancing weight on the rear-mounted beam is adjusted through counter weight drive electric jar to the beam-pumping unit, convenient and fast more, and counter weight drive electric jar nut and counter weight drive electric jar lead screw of counter weight drive electric jar all are located counter weight drive electric jar outer tube, at outdoor operation in-process, can guarantee operation safe and reliable, avoid counter weight drive electric jar nut and counter weight drive electric jar lead screw corrosion.

Description

Pumping unit with electric cylinder driving balance weight

Technical Field

The utility model relates to an oil recovery equipment field, concretely relates to beam-pumping unit of electric cylinder drive counter weight.

Background

The balance system is an important component of the oil pumping unit, the balance of the oil pumping unit is the key of the design and production of the oil pumping unit, and the performance and the balance effect of the balance system directly influence the energy conservation, the service life and the operation safety of the oil pumping unit. In the process of oil extraction operation, the load of the oil pumping unit in the whole operation period is unevenly distributed under the influence of the factors such as the colloid content, the density, the wax content, the depth and the like of oil, and the oil pumping unit needs to drive a sucker rod and the oil on the upper stroke of the oil pumping unit and needs a motor to provide larger power. When the pumping unit is in the down stroke, the motor is in the power generation state in the descending process of the pumping rod. The influence of the uneven load of the pumping unit can cause the service life of the motor, the reduction gearbox and the four-bar mechanism to be reduced, and the sucker rod has the safety risk of breakage.

Current counter weight formula beam-pumping unit discloses a beam-pumping unit as application number 201820996543.7's utility model patent, including the horse head, the walking beam, and a support, a pedestal, walking beam supporting seat and balancing piece, erect the top at the support through walking beam supporting seat supported, support bottom connection base, the both ends of walking beam set up balancing piece and horse head respectively, be equipped with servo electric cylinder drive arrangement on the walking beam, walking beam and base are connected respectively at its both ends, servo electric cylinder drive arrangement is located between counter weight subassembly and the walking beam support seat, still be equipped with one on the walking beam and be used for gentle walking beam's swing arm action and prevent to lead to the buffer that the support topples after the gravity unbalance at walking beam both ends after the wire rope fracture, beam and base are connected respectively to buffer's both ends, buffer is located between horse head and the walking beam supporting seat. Because the load that horse head one end born when the operation is unchangeable, fixed counter weight is although can balanced load to a certain extent, but the balanced scope is limited, can not carry out the mating type according to the demand and adjust.

Disclosure of Invention

Based on this, this application provides an electric cylinder drive counter weight's beam-pumping unit, solves the limitation that current counter weight design exists, the utility model discloses a technical purpose is realized through following technical scheme:

a pumping unit with an electric cylinder driven counterweight comprises a base, a support, a walking beam and a horse head, wherein the support is fixed at the upper end of the base, the middle part of the walking beam is hinged and installed at the upper end of the support, the horse head is installed at one end of the walking beam, the other end of the walking beam is also connected with a rear connecting walking beam, a movable counterweight block is further arranged on the rear connecting walking beam, and a counterweight driven electric cylinder for driving the counterweight block is further installed at one end, close to the rear connecting walking beam, of the walking beam; the lower end of the walking beam close to one end of the walking beam connected with the walking beam at the back is also provided with a driving device for driving the horse head to move up and down.

Furthermore, a safety rod is further arranged on one side of the driving device, and two ends of the safety rod are respectively hinged to the lower end of the walking beam and the upper end of the base.

Further, counter weight drive electricity jar includes counter weight drive electricity jar inner tube, counter weight drive electricity jar outer tube, counter weight drive electricity jar nut, counter weight drive electricity jar lead screw, counter weight drive electricity jar motor, counter weight drive electricity jar nut is installed in counter weight drive electricity jar inner tube one end, in counter weight drive electricity jar lead screw one end was followed counter weight drive electricity jar nut screw in counter weight drive electricity jar inner tube, the other end of counter weight drive electricity jar lead screw is connected with counter weight drive electricity jar motor transmission, counter weight drive electricity jar motor installation is fixed in counter weight drive electricity jar outer tube one end, counter weight drive electricity jar inner tube one end activity is inserted in the counter weight drive electricity jar outer tube.

Furthermore, a slide rail is further arranged on the rear connecting walking beam, a slide block is movably mounted on the slide rail, a counterweight block is mounted on the slide block, and one end of the inner tube of the counterweight driving electric cylinder is connected with the slide block.

Furthermore, the driving device is a driving electric cylinder, and two ends of the driving electric cylinder are respectively hinged with the lower end of the walking beam and the upper end of the base.

Further, the safety rod comprises an inner rod, an outer rod and a buffer rod, the buffer rod is connected to the lower end of the inner rod, the upper end of the inner rod is movably inserted into the outer rod, the upper end of the outer rod is hinged to the lower end of the walking beam, the lower end of the buffer rod is hinged to the upper end of the base, and a locking device is further arranged between the inner rod and the outer rod.

Furthermore, the locking device comprises an electromagnetic bolt, and the inner rod is provided with a plurality of bolt holes used for matching with the electromagnetic bolt.

Further, the buffer rod includes dustcoat, spring, and the spring mounting is in the dustcoat, and interior pole lower extreme inserts the dustcoat from the top down in, and interior pole lower extreme is arranged in to the spring, and the dustcoat lower extreme is connected with the base is articulated.

Further, still be equipped with the friction disc between slider and the slide rail, the friction disc is installed in the slider bottom, and the friction disc sets up, can increase the friction between slider and the slide rail, reduces the effort that the balancing weight produced counter weight drive electric cylinder under walking beam tilt state, prolongs counter weight drive electric cylinder's life.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the position of the balancing weight on the rear-connected beam is adjusted through the counterweight driving electric cylinder, the operation is more convenient and faster, the counterweight driving electric cylinder nut and the counterweight driving electric cylinder screw rod of the counterweight driving electric cylinder are both positioned in the counterweight driving electric cylinder outer pipe, the operation can be ensured to be safe and reliable in the outdoor operation process, and the counterweight driving electric cylinder nut and the counterweight driving electric cylinder screw rod are prevented from being corroded.

2. The setting of safety lever can prevent that accident from taking place to cause the incident, no matter be that horse head one end breaks down or balancing weight one end trouble, all can reduce the emergence of incident through safety lever.

3. The setting of buffer beam avoids horse head one side load to disappear suddenly and causes the damage to safety lever and drive arrangement when leading to the sudden grow of balancing weight one side load.

4. The disassembly is safer, and the load at one end of the horse head can be disassembled after the position of the balancing weight is adjusted to the position of the support, so that the gravity is concentrated at the position of the support.

Drawings

Fig. 1 is the structure schematic diagram of the counterweight pumping unit driven by the electric cylinder of the present invention.

Fig. 2 is a schematic structural diagram of a driving device in the present invention.

Fig. 3 is a schematic view of the buffer rod structure of the present invention.

Fig. 4 is a schematic structural view of the counterweight driving electric cylinder of the present invention.

Fig. 5 is a schematic view of the installation of the middle weight block of the present invention.

Fig. 6 is a schematic view of the installation of the middle slide block of the present invention.

Fig. 7 is the schematic view of the installation of the middle weight block and the sliding block of the present invention.

In the figure, 1, a base; 2. a support; 3. a walking beam; 4. a donkey head; 5. the rear part is connected with a walking beam; 6. a balancing weight; 7. a drive device; 8. a counterweight-driven electric cylinder; 9. a safety lever; 10. a slider; 11. a slide rail; 12. a friction plate; 13. a mounting frame; 81. the counterweight drives the inner tube of the electric cylinder; 82. the counterweight drives the outer tube of the electric cylinder; 83. a counterweight-driven electric cylinder nut; 84. the counterweight drives an electric cylinder screw rod; 85. a counterweight-driven electric cylinder motor; 91. an inner rod; 92. an outer rod; 93. a buffer rod; 701. a servo motor; 702. an upper bolt; 703. a ball screw; 704. a ball nut; 705. a ball nut seat; 706. an outer sleeve; 707. a lower bolt; 708. an inner sleeve; 931. a housing; 932. a spring.

Detailed Description

The technical solution of the present invention is further described below with reference to the following embodiments:

an oil pumping unit with an electric cylinder driven counterweight is shown in figures 1-7 and comprises a base 1, a bracket 2, a walking beam 3, a horse head 4, a rear walking beam 5, a counterweight block 6, a driving device 7, a counterweight driven electric cylinder 8 and a safety rod 9;

support 2 installation is fixed on base 1, and walking beam 3 erects the upper end at support 2, and support 2 upper end articulates the lower extreme at walking beam 3 middle part, and horse head 4 is installed in the one end of walking beam 3, connects walking beam 5 to connect to fix in the other one end of walking beam 3 after, can be the building as an organic whole, also can connect fixedly through the welded mode, also can fix through bolted connection. Connect the slide rail 11 of 5 upper ends of rear connection walking beams, install slider 10 on the slide rail 11, balancing weight 6 passes through mounting bracket 13 and installs on slider 10, slider 10 can slide relative to slide rail 11, for reducing balancing weight 6 and to the effort of counter weight drive electricity jar 8 under walking beam tilt state, still be equipped with friction disc 12 between slider 10 and slide rail 11, friction disc 12 is installed in the slider bottom, the material of friction disc is like the clutch blocks material of automobile brake block, belongs to current material, does not do not describe any more.

In order to control the sliding of the balancing weight 6, a fixed balancing weight driving electric cylinder 8 is installed on the walking beam 3, the balancing weight 6 is pulled to move along a sliding rail 11 through the balancing weight driving electric cylinder 8, and the sliding rail 11 is laid along the rear connecting walking beam 5. The lower end of the walking beam at one end of the walking beam 3, which is provided with the counterweight driving electric cylinder 8, is provided with the driving device 7 and the safety rod 9, the two ends of the driving device 7 are respectively hinged with the lower end of the walking beam 3 and the upper end of the base 1, and the two ends of the safety rod 9 are respectively hinged with the lower end of the walking beam 3 and the upper end of the base 1.

Specifically, the driving device 7 is a driving electric cylinder, such as the servo electric cylinder driving device in the utility model with application number 201820996543.7, as shown in fig. 2, the structure thereof includes a servo motor 701, a ball screw 703, an outer sleeve 706, an inner sleeve 708 and a ball nut 704, the outer sleeve 706 is sleeved outside the inner sleeve 708, the ball nut 704 is arranged on the inner sleeve 708, and the ball nut 704 is screwed into the ball screw 703.

The inner sleeve 708 is a clearance fit with the outer sleeve 706, and the outer wall of the inner sleeve 708 is spaced from the inner wall of the outer sleeve 706 by a distance that allows the inner sleeve 708 and the outer sleeve 706 to be nested and slide relative to the inner sleeve 708 to allow the outer sleeve 706 to be raised and lowered along the outer wall of the inner sleeve 708.

Ball nut 704 is fixed to ball nut seat 705, and ball nut seat 705 is fixed to the upper end opening of inner sleeve 708, so that ball nut 704 is kept relatively stationary when ball screw 703 moves, and functions to restrict the ball screw from moving in the horizontal direction, thereby reducing resonance. A clearance of 1-5mm exists between the ball nut seat 705 and the outer sleeve 706 to enable the outer sleeve 706 to move up and down relative to the inner sleeve.

The outer sleeve 706 has an upper pin 702 attached thereto and the inner sleeve 708 has a lower pin 707 attached thereto. The upper and

lower pins

702 and 707 limit the vertical displacement of the outer sleeve, so as to limit the stroke of the ball screw 703, so that the ball screw 703 can enter the mineral oil at the bottom of the inner sleeve when descending, self-lubricating when lifting and prolonging the service life of the ball screw.

Specifically, safety lever 9 includes interior pole 91, outer pole 92, buffer beam 93 is 201920196094.2 as application number utility model patent in the energy storage portion, as shown in fig. 1 and fig. 3, buffer beam 93 connects at interior pole 91 lower extreme, interior pole 91 upper end activity inserts in outer pole 92, outer pole 92 upper end articulates the lower extreme at walking beam 3, buffer beam 93's lower extreme articulates the upper end at base 1, still be equipped with locking device between interior pole 91 and the outer pole 92, locking device can be the electromagnetism bolt, also known as electromagnetism bolt lock or call automatically controlled bolt lock, it adopts the bolt that makes as the spring bolt to produce flexible action after the electromagnetic force drive, be equipped with a plurality of bolt holes that are used for cooperating the electromagnetism bolt on interior pole 91, the normal operating spring bolt shrink, interior pole can be flexible removal of outer pole relatively, when the trouble takes place, the spring bolt stretches into in the bolt hole, with interior pole deadlock. The buffer rod 93 comprises an outer cover 931 and a spring 932, the outer cover 931 is of a cylinder structure, the spring 932 is installed in the outer cover 931, the lower end of the inner rod 91 is inserted into the outer cover 931 from top to bottom, the spring 932 is arranged at the lower end of the inner rod 931, and the lower end of the outer cover 931 is hinged to the base 1.

Specifically, the counterweight driving electric cylinder 8 includes a counterweight driving electric cylinder inner tube 81, a counterweight driving electric cylinder outer tube 82, a counterweight driving electric cylinder nut 83, a counterweight driving electric cylinder lead screw 84, a counterweight driving electric cylinder motor 85, the counterweight driving electric cylinder nut 83 is installed at one end of the counterweight driving electric cylinder inner tube 81, one end of the counterweight driving electric cylinder lead screw 84 is screwed into the counterweight driving electric cylinder inner tube 81 from the counterweight driving electric cylinder nut 83, the other end of the counterweight driving electric cylinder lead screw 84 is in transmission connection with the counterweight driving electric cylinder motor 85, the counterweight driving electric cylinder motor 85 is installed and fixed at one end of the counterweight driving electric cylinder outer tube 82, and one end of the counterweight driving electric cylinder inner tube 81 is movably inserted into the counterweight driving electric cylinder outer tube 82. The counterweight driving electric cylinder outer pipe 82 and the counterweight driving electric cylinder motor 85 are both installed and fixed at the upper end of the walking beam 3, the counterweight driving electric cylinder inner pipe 81 is hinged with the connecting slide block 10, and then the counterweight block 6 is pulled to move on the rear walking beam 5.

When the balancing weight 6 is adjusted, the load sensor at one end of the horse head measures the stress of the upper stroke of the horse head and the stress of the lower stroke, the average value of the stress which tends to be stable during the upper stroke and the average value of the stress which tends to be stable during the lower stroke are selected as the balancing weight compensated by the balancing weight, the position of the hinged point of the counter weight relative to the support on the rear-connected walking beam is selected through the force arm calculation, the sliding block is connected with the inner pipe of the electric cylinder through the counter weight, and then the electric cylinder is driven by the counter weight to move on the rear-connected walking beam.

The present embodiment is only for further explanation of the present invention, and is not a limitation of the present invention, and those skilled in the art can make various inventive modifications to the present embodiment as needed after reading the present specification, but all of them are protected by patent law within the scope of the present invention.

Claims

1. The oil pumping unit is characterized in that the other end of the walking beam is also connected with a rear connecting walking beam, a movable balancing weight is further arranged on the rear connecting walking beam, and a counterweight driving electric cylinder for driving the balancing weight is further arranged at one end, close to the rear connecting walking beam, of the walking beam; the lower end of the walking beam close to one end of the rear walking beam is also provided with a driving device for driving the horse head to move up and down.

2. The pumping unit of claim 1, wherein a safety rod is further disposed on one side of the driving device, and two ends of the safety rod are respectively hinged to the lower end of the walking beam and the upper end of the base.

3. The pumping unit of claim 2, wherein the counterweight-driven electric cylinder comprises a counterweight-driven electric cylinder inner tube, a counterweight-driven electric cylinder outer tube, a counterweight-driven electric cylinder nut, a counterweight-driven electric cylinder lead screw, and a counterweight-driven electric cylinder motor, the counterweight-driven electric cylinder nut is installed at one end of the counterweight-driven electric cylinder inner tube, one end of the counterweight-driven electric cylinder lead screw is screwed into the counterweight-driven electric cylinder inner tube from the counterweight-driven electric cylinder nut, the other end of the counterweight-driven electric cylinder lead screw is in transmission connection with the counterweight-driven electric cylinder motor, the counterweight-driven electric cylinder motor is installed and fixed at one end of the counterweight-driven electric cylinder outer tube, and one end of the counterweight-driven electric cylinder inner tube is movably inserted into the counterweight-driven electric cylinder outer tube.

4. The oil pumping unit of claim 3, wherein the rear walking beam is further provided with a slide rail, the slide rail is movably provided with a slide block, the counterweight block is arranged on the slide block, and one end of the inner tube of the counterweight-driven electric cylinder is connected with the slide block.

5. The pumping unit of claim 2, wherein the driving device is an electric driving cylinder, and two ends of the electric driving cylinder are respectively hinged to the lower end of the walking beam and the upper end of the base.

6. The oil pumping unit of claim 2, wherein the safety rod comprises an inner rod, an outer rod and a buffer rod, the buffer rod is connected to the lower end of the inner rod, the upper end of the inner rod is movably inserted into the outer rod, the upper end of the outer rod is hinged to the lower end of the walking beam, the lower end of the buffer rod is hinged to the upper end of the base, and a locking device is arranged between the inner rod and the outer rod.

7. The pumping unit of claim 6, wherein the locking device comprises an electromagnetic bolt, and the inner rod is provided with a plurality of bolt holes for engaging the electromagnetic bolt.

8. The oil pumping unit of the electric cylinder driven counterweight according to claim 6 or 7, wherein the buffer rod comprises an outer cover and a spring, the spring is installed in the outer cover, the lower end of the inner rod is inserted into the outer cover from the upper end downwards, the spring is arranged at the lower end of the inner rod, and the lower end of the outer cover is hinged with the base.

9. The oil pumping unit of claim 4, wherein a friction plate is arranged between the sliding block and the sliding rail, and the friction plate is arranged at the bottom of the sliding block.