A double-well pumping unit of gantry frame type

Abstract

The present application relates to the technical field of pumping unit, and discloses a double-well pumping unit with a portal frame, which comprises a frame and two pumping mechanisms symmetrically arranged on the frame; each pumping mechanism comprises a power module, a transmission module and a pumping execution module; the power module and the transmission module are connected with the frame, the power module is connected with the transmission module, and the transmission module is connected with the pumping execution module; the power module is used for generating unidirectional rotating power and transmitting the unidirectional rotating power to the transmission module; the transmission module is used for converting the unidirectional rotating power into periodic tension with changing size and transmitting the periodic tension to the pumping execution module; and the pumping execution module is used for receiving the tension transmitted by the transmission module and moving up and down to realize oil pumping operation. The present application has compact structure, can effectively reduce the damage rate of power components and improve the operation stability.

Description

Technical Field

[0001] This invention relates to the field of oil pumping unit technology, specifically to a gantry frame type dual-well oil pumping unit. Background Technology

[0002] As oil extraction depths continue to increase, higher demands are placed on the deep oil extraction capabilities of pumping units. Currently available pumping units suitable for deep oil extraction have the following shortcomings: Some oil pumping units rely on the frequent forward and reverse switching of the motor to achieve reciprocating oil pumping, which can easily lead to damage to the motor and other power components and cause impact on the power grid. In order to ensure operational stability, some oil pumping units have a large body structure, resulting in a large footprint and significantly increasing equipment costs. Summary of the Invention

[0003] The technical objective of this invention is to address the shortcomings of the prior art by providing a gantry frame type dual-well pumping unit that has a compact structure, can effectively reduce the damage rate of power components, and improve operational stability.

[0004] The technical solution adopted in this invention is as follows: A gantry frame type dual-well pumping unit, the gantry frame type dual-well pumping unit includes a frame and two pumping mechanisms symmetrically arranged on the frame; The oil pumping mechanism includes a power module, a transmission module, and an oil pumping execution module; Both the power module and the transmission module are connected to the frame. The power module is connected to the transmission module, and the transmission module is connected to the oil pumping execution module. The power module generates unidirectional rotational power and transmits it to the transmission module. The transmission module converts the unidirectional rotational power into a periodically varying pulling force and transmits it to the oil pumping execution module. The oil pumping execution module receives the pulling force transmitted by the transmission module and moves up and down reciprocally to achieve the oil pumping operation.

[0005] The above-mentioned technical measures, by symmetrically arranging two pumping mechanisms on the frame, enable dual-well pumping operations while simultaneously offsetting most of the vibrations, external forces, and lateral tilts generated by the pumping mechanisms during operation, effectively improving operational stability. By integrating the two pumping mechanisms onto the same frame, the structure is compact, effectively improving space utilization. The power module adopts unidirectional rotational power output, which effectively avoids frequent forward and reverse switching of power components, thereby reducing the damage rate of power components and the impact on the power grid, and improving operational stability and service life.

[0006] Furthermore, the rack includes a base, a tower, and a top cover; There are two towers, which are respectively located at opposite ends of the base; The top cover is connected to the tops of two towers at opposite ends.

[0007] The above-mentioned technical measures, by adopting a closed gantry frame structure composed of a base, tower and top cover, can provide stable support for the pumping mechanism and improve operational stability.

[0008] Furthermore, the power module includes a motor, an energy storage device, a reducer, a clutch and brake, and a transmission; The energy storage device, reducer, and transmission are all mounted on the base of the pumping unit frame. The motor is mounted on the energy storage device, and the output end of the motor is connected to the input end of the energy storage device. The output end of the energy storage device is connected to the input end of the reducer. The output end of the reducer is connected to the clutch and brake, and the clutch and brake is connected to the input end of the transmission. The output end of the transmission is connected to the transmission module.

[0009] The aforementioned technical measures, by separating the reducer and transmission, offer several advantages over traditional integrated reducer and transmission devices. Firstly, they effectively reduce the overall size and weight. Secondly, they allow for the selection of cycloidal pinwheel reducers or other planetary reducers with large transmission ratios and small size, providing a wider range of choices. Thirdly, they enable the clutch and brake connected between the reducer and transmission to engage and disengage at low speeds, effectively reducing impact. Furthermore, by incorporating an energy storage device, excess kinetic energy can be stored when the motor is under low load, providing auxiliary compensation for the motor's kinetic energy output when the motor is under high load. This ensures operational stability, reduces the impact of load fluctuations on production efficiency, effectively absorbs excess energy output from the motor, and avoids energy waste.

[0010] Furthermore, the transmission is a gear transmission.

[0011] Furthermore, the clutch brake includes a transmission disc, a clutch, and a brake disc; The transmission disc is fixed on the output shaft of the reducer, and the transmission disc rotates synchronously with the output shaft of the reducer; The transmission disc has multiple pin holes, and the clutch has multiple pins that correspond one-to-one with the multiple pin holes. The brake disc is fixed to the transmission, and the brake disc has a tapered hole. The clutch has a tapered platform corresponding to the tapered hole, and the angle of the tapered platform is smaller than the friction angle between the tapered platform and the tapered hole. The clutch is slidably connected to the input shaft of the transmission, and the clutch is axially movable on the input shaft of the transmission; During transmission, the multiple pins of the clutch are inserted into the pin holes of the transmission disc one by one, and the conical platform of the clutch and the conical hole of the brake disc are in clearance fit. During braking, the multiple pins of the clutch disengage from their corresponding pin holes, and the conical platform of the clutch engages with the conical hole of the brake disc. In neutral, the multiple pins of the clutch disengage from their corresponding pin holes, and the conical platform of the clutch is in clearance fit with the conical hole of the brake disc.

[0012] The above-mentioned technical measures, by setting a conical hole in the brake disc and a corresponding conical platform in the clutch, and by setting the angle of the conical platform to be smaller than the friction angle between the conical platform and the conical hole, enable the conical platform and the conical hole to form a self-locking mechanism when the conical surfaces are engaged, thereby improving stability and reliability. At the same time, by using the conical surface engagement method, the wear can be compensated by adjusting the movement distance, which is beneficial to extending the service life.

[0013] Furthermore, the transmission module includes a crank, a connecting rod, a pendulum frame, a movable pulley, a fixed pulley, and a fixed pulley; The crank is connected to the output end of the gearbox, one end of the connecting rod is hinged to the crank, the other end of the connecting rod is hinged to the swing frame, one end of the swing frame is hinged to the tower, and the other end of the swing frame is fixedly connected to the movable rope pulley. The fixed rope wheel and the fixed pulley are respectively fixed to the top of the top cover. Multiple connecting ropes are wound between the movable rope wheel and the fixed rope wheel, and the connecting ropes are wound multiple times between the movable rope wheel and the fixed rope wheel. One end of the connecting rope is fixed to the movable rope wheel, and the other end of the connecting rope is led out from the fixed rope wheel and extends downward through the fixed pulley to connect with the oil pumping execution module.

[0014] The aforementioned technical measures, on the one hand, involve winding multiple connecting ropes between the movable and fixed sheaves, thus creating multiple connecting ropes between the fixed sheave and the pulley. This distributes the tension evenly, preventing excessive stress on any single connecting rope and extending its service life. Furthermore, connecting the lifting beam with multiple ropes ensures even stress distribution, effectively improving operational stability. On the other hand, by winding the connecting ropes multiple times between the movable and fixed sheaves, the swing amplitude of the swing frame is reduced while the movement distance of the lifting beam is increased.

[0015] Furthermore, the swing frame includes a first frame and a second frame. The first frame is hinged to the tower, the movable pulley is fixed to the second frame, the second frame is slidably connected inside the first frame, and the second frame can move along the length of the first frame.

[0016] The above-mentioned technical measures, by adjusting the position of the second frame inside the first frame, can flexibly adjust the position of the movable rope pulley, thereby adjusting the oil pumping stroke, adapting to different oil well depths, and improving versatility.

[0017] Furthermore, the swing frame is detachably connected to counterweights of adjustable weight and quantity.

[0018] The above-mentioned technical measures, by setting up adjustable counterweights of varying weight and quantity, can be flexibly adjusted according to factors such as load, thereby balancing the weight and frictional resistance of the oil pumping module and the oil, effectively improving operational stability, and reducing motor energy consumption.

[0019] Furthermore, the oil extraction execution module includes a lifting beam and a sucker rod; The lifting beam is connected to the connecting rope, and the lifting beam is connected to the sucker rod via a traction rope.

[0020] The above-mentioned technical measures, by connecting the lifting beam with connecting ropes and the lifting beam with traction ropes connecting the sucker rod, can control the length of the traction rope to always be kept short, reducing the swaying of the sucker rod when subjected to external forces (such as vibration, wind, etc.), and effectively improving operational stability; at the same time, by using a lifting beam, multiple connecting ropes can be connected, resulting in uniform force distribution and improved operational stability.

[0021] Furthermore, a guide rope is tensioned between the top cover and the base, and the two ends of the guide rope are respectively connected to the top cover and the base; The guide rope passes through the lifting beam, and the lifting beam can slide up and down along the length of the guide rope.

[0022] The above-mentioned technical measures, by setting up guide ropes, can guide the lifting beam to slide up and down along the length of the guide ropes, which can reduce the positional deviation of the lifting beam when subjected to external forces (such as vibration, wind, etc.) and help avoid wear on the inclined sucker rods; secondly, the two ends of the guide ropes are connected to the top cover and the base respectively, which can tighten the top cover, the base and the tower, and improve the overall stability of the structure.

[0023] One or more technical solutions provided by this invention have at least the following technical effects or advantages: This invention achieves dual-well pumping operations by symmetrically arranging two pumping mechanisms on a frame, which can mutually offset most of the vibrations, external forces, and lateral tilts generated by the pumping mechanisms during operation, effectively improving operational stability. By integrating the two pumping mechanisms onto the same frame, the structure is compact, effectively improving space utilization. The power module adopts unidirectional rotary power output, which can effectively avoid frequent forward and reverse switching of power components, thereby reducing the damage rate of power components and the impact on the power grid, and improving operational stability and service life. Attached Figure Description

[0024] The accompanying drawings, which are provided to further illustrate embodiments of the invention and constitute a part of this invention, are not intended to limit the scope of the invention. Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a reference diagram showing the usage status of the transmission module in this invention; Figure 3 This is a reference diagram showing the usage status of the oil extraction execution module in this invention; Figure 4 This is a schematic diagram of the connection structure between the clutch brake and the transmission and reducer in this invention; Figure 5 This is a schematic diagram of the motor structure in this invention; Figure 6 This is a schematic diagram of a connection structure between the counterweight and the pendulum frame in this invention; Figure 7 This is a schematic diagram of the power module in this invention; Among them, 1-frame; 101-base; 102-tower; 103-top cover; 104-guide rope; 2-power module; 201-motor; 202-reducer; 203-gearbox; 204-transmission disc; 205-clutch; 206-brake disc; 207-pin hole; 208-pin shaft; 209-tapered hole; 210-tapered platform; 211-energy accumulator; 212-coupling; 3-transmission module; 301-Crank; 302-Connecting rod; 303-Swing frame; 304-Moving rope pulley; 305-Fixed rope pulley; 306-Fixed pulley; 307-Connecting rope; 308-First frame; 309-Second frame; 310-Counterweight; 4-Oil extraction execution module; 401-Lifting beam; 402-Suck rod; 403-Traction rope; 5-Moving pulley; 6-Driving pulley; 7-Transmission belt; 8-Driven pulley. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below. Example 1

[0027] Reference Figures 1-5 and Figure 7 This embodiment provides a gantry frame type dual-well pumping unit, which includes a frame 1 and two pumping mechanisms symmetrically arranged on the frame 1. The oil pumping mechanism includes a power module 2, a transmission module 3, and an oil pumping execution module 4; Both the power module 2 and the transmission module 3 are connected to the frame 1. The power module 2 is connected to the transmission module 3, and the transmission module 3 is connected to the oil pumping execution module 4. The power module 2 generates unidirectional rotational power and transmits it to the transmission module 3. The transmission module 3 converts the unidirectional rotational power into a periodically varying pulling force and transmits it to the oil pumping execution module 4. The oil pumping execution module 4 receives the pulling force transmitted by the transmission module 3 and moves up and down reciprocally to achieve the oil pumping operation.

[0028] The rack 1 includes a base 101, a tower 102, and a top cover 103; There are two towers 102, which are respectively set at opposite ends of the base 101; the towers 102 adopt a truss structure. The two opposite ends of the top cover 103 are respectively connected to the top of the two towers 102.

[0029] The power module 2 includes a motor 201, an energy storage device 211, a reducer 202, a clutch and brake, and a transmission 203; The energy storage device 211, the reducer 202, and the transmission 203 are all mounted on the base 101 of the pumping unit frame 1. The motor 201 is mounted on the energy storage device 211. The output end of the motor 201 is connected to the input end of the energy storage device 211. The output end (i.e., the output shaft) of the energy storage device 211 is connected to the input end (input shaft) of the reducer 202. The output end (i.e., the output shaft) of the reducer 202 is connected to the clutch brake. The clutch brake is connected to the input end (i.e., the input shaft) of the transmission 203. The output end of the transmission 203 is connected to the transmission module 3.

[0030] Among them, reference Figure 5 The output end (i.e., output shaft) of motor 201 is connected to a drive pulley 6, which is connected to a driven pulley 8 via a transmission belt 7. The driven pulley 8 is connected to the input end (i.e., input shaft) of energy storage device 211.

[0031] The output shaft of the energy storage device 211 is arranged coaxially with the input shaft of the reducer 202 and is connected by a coupling 212.

[0032] The transmission 203 is a gear transmission. The transmission 203 is equipped with a shift fork device. By shifting the corresponding gear through the shift fork device, the speed is changed and the stroke is adjusted.

[0033] The energy storage device 211 is used to store the kinetic energy output by the motor 201 and transfer the kinetic energy to the reducer 202.

[0034] The energy storage device 211 is preferably a flywheel box, which has a rotatable flywheel inside. The flywheel is coaxially arranged with the driven pulley 8. The flywheel box is mounted on the base 101, and the motor 201 is mounted on the top of the flywheel box.

[0035] The clutch and brake system includes a transmission disc 204, a clutch 205, and a brake disc 206; The transmission disc 204 is fixed on the output shaft of the reducer 202, and the transmission disc 204 rotates synchronously with the output shaft of the reducer 202. The transmission disc 204 has multiple pin holes 207, and the clutch 205 has multiple pins 208 that correspond one-to-one with the multiple pin holes 207. The opening of the pin hole 207 is provided with a sloping guide structure to facilitate the insertion of the pin 208 into the pin hole 207.

[0036] The brake disc 206 is fixed on the transmission 203. The brake disc 206 has a tapered hole 209. The clutch 205 has a tapered platform 210 corresponding to the tapered hole 209. The angle of the tapered platform 210 is smaller than the friction angle between the tapered platform 210 and the tapered hole 209. The clutch 205 is slidably connected to the input shaft of the transmission 203, and the clutch 205 can move axially on the input shaft of the transmission 203. The clutch 205 and the transmission 203 are splinedly connected, and the internal spline hole of the clutch 205 is slidably connected to the spline shaft (i.e., the input shaft) extending outward from the transmission 203. The spline shaft is rotatably supported in the mounting hole of the vertical plate of the transmission 203 by bearings.

[0037] During transmission, multiple pins 208 of the clutch 205 are inserted into the pin holes 207 of the transmission disc 204 in a one-to-one correspondence, and the conical platform 210 of the clutch 205 and the conical hole 209 of the brake disc 206 are in clearance fit. During braking, the multiple pins 208 of the clutch 205 disengage from the corresponding pin holes 207, and the conical platform 210 of the clutch 205 engages with the conical hole 209 of the brake disc 206. In neutral, the multiple pins 208 of the clutch 205 disengage from the corresponding pin holes 207, and the tapered platform 210 of the clutch 205 is in clearance fit with the tapered hole 209 of the brake disc 206.

[0038] A shift fork mechanism is fixed on the base 101. The shift fork mechanism includes a bracket and a shift fork set on the top of the bracket. The shift fork includes a semicircular ring and a handle rod. The clutch 205 has an annular groove on its outer periphery. The semicircular ring of the shift fork is located in the annular groove of the clutch 205. The handle rod has a bolt hole. A positioning screw passes through the bolt hole. The positioning screw is connected to the bracket. The handle rod can rotate around the positioning screw to drive the semicircular ring to push the clutch 205 to move axially along the spline shaft of the transmission 203. To prevent the clutch from moving unexpectedly, the nut of the positioning screw can be tightened to lock and fix the handle rod, thereby locking and positioning the clutch 205.

[0039] The transmission module 3 includes a crank 301, a connecting rod 302, a swing frame 303, a movable rope wheel 304, a fixed rope wheel 305, and a fixed pulley 306; the crank 301 is connected to the output end of the gearbox 203, one end of the connecting rod 302 is hinged to the crank 301, the other end of the connecting rod 302 is hinged to the swing frame 303, one end of the swing frame 303 is hinged to the tower 102, and the other end of the swing frame 303 is fixedly connected to the movable rope wheel 304; The fixed rope wheel 305 and the fixed pulley 306 are respectively fixed to the top of the top cover 103. Multiple connecting ropes 307 are wound between the movable rope wheel 304 and the fixed rope wheel 305. The connecting ropes 307 are wound multiple times between the movable rope wheel 304 and the fixed rope wheel 305. One end of the connecting rope 307 is fixed to the movable rope wheel 304, and the other end of the connecting rope 307 is led out from the fixed rope wheel 305 and extends downward through the fixed pulley 306 to connect with the oil pumping execution module 4.

[0040] Among them, the movable rope wheel 304, the fixed rope wheel 305 and the fixed pulley 306 all have rope grooves, and the connecting rope 307 is wound multiple times between the movable rope wheel 304 and the fixed rope wheel 305. The specific number of turns depends on the actual situation.

[0041] The movable pulley 304, fixed pulley 305, and fixed pulley 306 all have diameters greater than 500mm, which reduces the bending stress on the connecting rope 307, making it more durable and extending its service life. The rims of the movable pulley 304, fixed pulley 305, and fixed pulley 306 are made of cast iron, which contains graphite. This cast iron is low-cost, has high compressive strength, and possesses its own lubricating properties, providing some protection for the connecting rope 307.

[0042] The swing frame 303 includes a first frame 308 and a second frame 309. The first frame 308 is hinged to the tower 102, and the movable pulley 304 is fixed to the second frame 309. The second frame 309 is slidably connected to the inside of the first frame 308 and can move along the length of the first frame 308.

[0043] Specifically, a rack is installed on the first frame 308, and a large gear and a small gear are installed on the second frame 309 corresponding to the rack. The rack and the large gear mesh with each other, and the small gear is connected to a handle. By turning the handle, the small gear is driven to rotate, which in turn drives the large gear to rotate, causing the second frame 309 to slide relative to the first frame 308. By using the small gear to drive the large gear to rotate, the speed reduction is relatively large, which makes it difficult for the second frame 309 to slide on its own.

[0044] The swing frame 303 is detachably connected to a counterweight 310 with adjustable weight and quantity.

[0045] Specifically, the counterweight 310 can be detachably connected to the top of the first frame 308 or the end of the second frame 309 by bolts.

[0046] The oil extraction execution module 4 includes a lifting beam 401 and a sucker rod 402; The lifting beam 401 is connected to the connecting rope 307, and the lifting beam 401 is connected to the sucker rod 402 via the traction rope 403.

[0047] A guide rope 104 is tensioned between the top cover 103 and the base 101. The two ends of the guide rope 104 are connected to the top cover 103 and the base 101 respectively. The guide rope 104 passes through the lifting beam 401, and the lifting beam 401 can slide up and down along the length of the guide rope 104.

[0048] In operation, the operator rotates the lever clockwise or counterclockwise to put the clutch 205 in neutral (i.e., the multiple pins 208 of the clutch 205 disengage from their corresponding pin holes 207, and the conical platform 210 of the clutch 205 is in clearance fit with the conical hole 209 of the brake disc 206). Tightening the nut on the positioning screw locks the lever, thus locking the clutch 205. The motor 201 is then started. The motor 201 outputs unidirectional rotational power, which is transmitted via the driving pulley 6 and the transmission belt 7 to the driven pulley 8, thereby driving the flywheel to rotate. The unidirectional rotational kinetic energy increases the flywheel speed and simultaneously accelerates the reducer. 202. The transmission disc 204 achieves the same rotational speed as the flywheel. When the flywheel reaches its designed maximum speed, loosen the nut on the positioning screw and turn the lever clockwise to move the clutch 205 axially to the right on the splined shaft of the transmission 203. Multiple pins 208 of the clutch 205 are inserted one-to-one into the pin holes 207 of the transmission disc 204. Tighten the nut on the positioning screw to lock the lever and clutch 205. At this point, power is transmitted to the clutch 205, and then through the splined shaft to the transmission 203. The transmission 203 outputs power to the crank 301, driving the crank 301 (i.e.,...). Figure 2 The OH in the crank 301 rotates, and the crank 301 drives the connecting rod 302 (i.e., Figure 2The connecting rod 302 pulls down the pendulum 303 to rotate clockwise around point F, while the movable pulley 304 moves from point A to point A'. During the movement of the movable pulley 304 towards point A', the connecting rope 307 causes the movable pulley 304 to rotate, thereby sequentially driving the fixed pulley 305 and the fixed pulley 306 to rotate synchronously. At this time, the tension of the connecting rope 307 on the lifting beam 401 is greater than the total weight of the lifting beam 401 and the sucker rod 402, causing the connecting rope 307, which extends downward through the fixed pulley 306, to move upward, thereby dragging the lifting beam 401 and the sucker rod. 402 moves upward to complete the upward pumping action; as the crank 301 rotates, the connecting rod 302 pushes the swing frame 303 to rotate counterclockwise around point F, and the movable rope wheel 304 moves from point A' to point A. During the process of the movable rope wheel 304 moving towards point A, the tension of the connecting rope 307 on the lifting beam 401 is reduced to less than the total weight of the lifting beam 401 and the sucker rod 402. Under the action of the weight of the lifting beam 401 and the sucker rod 402, the connecting rope 307 extending downward through the fixed pulley 306 moves downward to complete the downward pumping action; repeat the downward pumping action and the upward pumping action to complete the pumping work.

[0049] When stopping operation or shifting gears, loosen the nut on the positioning screw and turn the lever counterclockwise to disengage the multiple pins 208 of the clutch 205 from their corresponding pin holes 207. The tapered platform 210 of the clutch 205 engages with the tapered hole 209 of the brake disc 206. Tighten the nut on the positioning screw to lock the lever and clutch 205. The friction generated by the contact surfaces of the tapered platforms 210 and 209 prevents the clutch 205 from rotating, thereby preventing the splined shaft of the transmission 203 from rotating. This stops all gears in the transmission 203 from rotating. The shift fork device in the transmission 203 then moves the gears to re-pair and mesh, achieving speed adjustment. After speed adjustment, the handle is rotated clockwise, causing the multiple pins 208 of the clutch 205 to be inserted one-to-one into the pin holes 207 of the transmission disc 204. The conical platform 210 of the clutch 205 and the conical hole 209 of the brake disc 206 are in clearance fit. Tightening the nut on the positioning screw locks the handle and the clutch 205, connecting the power source. Example 2

[0050] The rest of the content of this embodiment is the same as that of embodiment 1, except that: Reference Figure 6 The swing frame 303 is detachably connected to the counterweight 310, which has an adjustable weight and quantity, via a pulley mechanism.

[0051] The pulley mechanism includes three fixed pulleys 306 and one movable pulley 5. The two fixed pulleys 306 are respectively installed on the base, one fixed pulley is installed at the bottom of the top cover, and the movable pulley 5 is installed at the bottom of the swing frame 303.

[0052] Two connecting ropes 307 are wound between the movable pulley 5 and a fixed pulley 306 mounted on the base. The two connecting ropes 307 are wound four times between the movable pulley 5 and the fixed pulley 306 respectively. The two connecting ropes 307 are led out from the fixed pulley 306 and extend downwards through another fixed pulley 306 mounted on the base and a fixed pulley 306 mounted at the bottom of the top cover to connect with the counterweight 310.

[0053] The two connecting ropes 307 are wound four times between the movable pulley 5 and the fixed pulley 306 respectively, so that the movable pulley 5 bears the tension. ,in, The tension borne by the movable pulley 5 The weight of the counterweight 310 is given. It can be seen that using the pulley mechanism in this embodiment to connect the counterweight 310, compared with the scheme of directly connecting it to the swing frame in Embodiment 1, can reduce the weight and volume of the counterweight 310 under the same conditions, but the structure is more complex.

[0054] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0055] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A gantry frame type dual-well pumping unit, characterized in that: The gantry frame type dual-well pumping unit includes a frame (1) and two pumping mechanisms symmetrically arranged on the frame (1); The oil pumping mechanism includes a power module (2), a transmission module (3), and an oil pumping execution module (4). The power module (2) and the transmission module (3) are both connected to the frame (1), the power module (2) is connected to the transmission module (3), and the transmission module (3) is connected to the oil pumping execution module (4); The power module (2) is used to generate unidirectional rotational power and transmit it to the transmission module (3). The transmission module (3) is used to convert the unidirectional rotational power into a periodically varying pulling force and transmit it to the oil pumping execution module (4). The oil pumping execution module (4) is used to receive the pulling force transmitted by the transmission module (3) and move up and down reciprocally to realize the oil pumping operation.

2. The gantry frame type dual-well pumping unit according to claim 1, characterized in that: The frame (1) includes a base (101), a tower (102), and a top cover (103). There are two towers (102), and the two towers (102) are respectively arranged at opposite ends of the base (101); The top cover (103) is connected to the top of the two towers (102) at its opposite ends.

3. The gantry frame type dual-well pumping unit according to claim 2, characterized in that: The power module (2) includes a motor (201), an energy storage device (211), a reducer (202), a clutch brake and a transmission (203). The energy storage device (211), reducer (202) and transmission (203) are all mounted on the base (101). The motor (201) is mounted on the energy storage device (211). The output end of the motor (201) is connected to the input end of the energy storage device (211). The output end of the energy storage device (211) is connected to the input end of the reducer (202). The output end of the reducer (202) is connected to the clutch brake. The clutch brake is connected to the input end of the transmission (203). The output end of the transmission (203) is connected to the transmission module (3).

4. The gantry frame type dual-well pumping unit according to claim 3, characterized in that: The transmission (203) is a gear transmission.

5. The gantry frame type dual-well pumping unit according to claim 3, characterized in that: The clutch brake includes a transmission disc (204), a clutch (205), and a brake disc (206). The transmission disc (204) is fixed on the output shaft of the reducer (202), and the transmission disc (204) rotates synchronously with the output shaft of the reducer (202); The transmission disc (204) has multiple pin holes (207), and the clutch (205) has multiple pins (208) that correspond one-to-one with the multiple pin holes (207). The brake disc (206) is fixed on the transmission (203). The brake disc (206) has a tapered hole (209). The clutch (205) has a tapered platform (210) corresponding to the tapered hole (209). The angle of the tapered platform (210) is smaller than the friction angle between the tapered platform (210) and the tapered hole (209). The clutch (205) is slidably connected to the input shaft of the transmission (203), and the clutch (205) is axially movable on the input shaft of the transmission (203); During transmission, multiple pins (208) of the clutch (205) are inserted into the pin holes (207) of the transmission disc (204) in a one-to-one correspondence, and the conical platform (210) of the clutch (205) and the conical hole (209) of the brake disc (206) are in clearance fit. During braking, the multiple pins (208) of the clutch (205) disengage from the corresponding pin holes (207), and the conical platform (210) of the clutch (205) engages with the conical hole (209) of the brake disc (206) on a conical surface. In neutral, the multiple pins (208) of the clutch (205) disengage from the corresponding pin holes (207), and the conical platform (210) of the clutch (205) is in clearance fit with the conical hole (209) of the brake disc (206).

6. The gantry frame type dual-well pumping unit according to claim 3, characterized in that: The transmission module (3) includes a crank (301), a connecting rod (302), a swing frame (303), a movable rope wheel (304), a fixed rope wheel (305), and a fixed pulley (306). The crank (301) is connected to the output end of the gearbox (203), one end of the connecting rod (302) is hinged to the crank (301), the other end of the connecting rod (302) is hinged to the swing frame (303), one end of the swing frame (303) is hinged to the tower (102), and the other end of the swing frame (303) is fixedly connected to the movable rope pulley (304); The fixed rope wheel (305) and the fixed pulley (306) are respectively fixed on the top of the top cover (103). Multiple connecting ropes (307) are wound between the movable rope wheel (304) and the fixed rope wheel (305), and the connecting ropes (307) are wound multiple times between the movable rope wheel (304) and the fixed rope wheel (305). One end of the connecting rope (307) is fixed on the movable rope wheel (304), and the other end of the connecting rope (307) is led out from the fixed rope wheel (305) and extends downward through the fixed pulley (306) to connect with the oil pumping execution module (4).

7. The gantry frame type dual-well pumping unit according to claim 6, characterized in that: The swing frame (303) includes a first frame (308) and a second frame (309). The first frame (308) is hinged to the tower (102), and the movable pulley (304) is fixed to the second frame (309). The second frame (309) is slidably connected to the inside of the first frame (308), and the second frame (309) can move along the length direction of the first frame (308).

8. The gantry frame type dual-well pumping unit according to claim 6, characterized in that: The swing frame (303) is detachably connected to a counterweight (310) with adjustable weight and quantity.

9. The gantry frame type dual-well pumping unit according to claim 6, characterized in that: The oil extraction execution module (4) includes a lifting beam (401) and a sucker rod (402). The lifting beam (401) is connected to the connecting rope (307), and the lifting beam (401) is connected to the sucker rod (402) via the traction rope (403).

10. The gantry frame type dual-well pumping unit according to claim 9, characterized in that: A guide rope (104) is tensioned between the top cover (103) and the base (101), and the two ends of the guide rope (104) are connected to the top cover (103) and the base (101) respectively. The guide rope (104) passes through the lifting beam (401), and the lifting beam (401) can slide up and down along the length of the guide rope (104).

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