Double-walking-beam electric cylinder pumping unit

Abstract

The utility model relates to a double-walking-beam electric cylinder pumping unit which comprises a support, walking beams, horse heads, a connecting beam, an auxiliary walking beam, an electric cylinder and a balance weight. The bracket comprises upper-layer supporting points and lower-layer supporting points which are distributed up and down; the middle of the walking beam is hinged to the upper-layer supporting point, and one end of the auxiliary walking beam is hinged to the lower-layer supporting point. The horse head is fixed at one end of the walking beam, and the other end of the walking beam and the other end of the auxiliary walking beam are respectively hinged with the connecting beam; the electric cylinder is arranged below the auxiliary walking beam, the electric cylinder is movably connected with the middle of the auxiliary walking beam, the electric cylinder drives the auxiliary walking beam to periodically swing back and forth along a lower-layer supporting point, and the connecting beam is kept in a vertical state; the counter weight is connected with the connecting beam, and the height of the counter weight does not exceed the height of the hinged position between the auxiliary walking beam and the connecting beam. The stability of the oil pumping unit is improved by reducing the installation height of the balance weight, and instability caused by the high gravity center of the oil pumping unit is avoided.

Description

Technical Field

[0001] The utility model relates to the field of oil pumping units, in particular to a double-walking-beam electric cylinder oil pumping unit. Background Art

[0002] The oil beam type oil pumping unit is a kind of equipment for oil extraction. Its structure generally includes several parts such as support, walking beam and donkey head. The donkey head is installed at one end of the walking beam. The walking beam swings up and down along the support point, so that the donkey head pulls the rope to pull the deep well pump to work.

[0003] In order to balance the traction force at one end of the donkey head, a counterweight is usually arranged at the other end of the walking beam to reduce the load required to drive the walking beam to swing up and down. The existing counterweight is usually directly installed and fixed at the end of the walking beam or the load is balanced by moving the lever arm along the walking beam. The prior art, such as the utility model patent with publication number CN208578554U, discloses a servo electric cylinder driven oil beam type oil pumping unit, which uses a balance block fixed at one end of the walking beam to achieve counterweight; the prior art, such as the utility model patent with publication number CN213116269U, discloses an electric cylinder driven counterweight oil pumping unit, which sets a rear connecting walking beam at one end of the walking beam, and uses the electric cylinder to pull the counterweight block to move along the rear connecting walking beam to achieve load balance of different sizes.

[0004] In actual use, since the counterweight is arranged at the end of the walking beam, whether it is movable or fixed, the height of the counterweight is relatively high, especially when the walking beam swings up and down, it will cause problems with the stability of the bracket and pose a safety hazard. Utility Model Content

[0005] In order to solve the problem of instability of the oil pump caused by the existing counterweight installation, the utility model provides a double-beam electric cylinder oil pump, which lowers the installation height of the counterweight, reduces the overall center of gravity height of the oil pump, and improves the stability and safety of the oil pump.

[0006] The technical purpose of this utility model is achieved through the following technical solutions:

[0007] A double-walking beam electric cylinder oil pumping unit, comprising a bracket, a walking beam, a donkey head, a connecting beam, an auxiliary walking beam, an electric cylinder, and a counterweight;

[0008] The bracket includes an upper support point and a lower support point, wherein the upper support point is arranged above the lower support point; the middle position of the walking beam is hingedly connected to the upper support point, and one end of the auxiliary walking beam is hingedly connected to the lower support point;

[0009] The donkey head is fixed to one end of the walking beam, and the other end of the walking beam and the other end of the auxiliary walking beam are respectively hingedly connected to the connecting beam, and the walking beam and the auxiliary walking beam are arranged in parallel;

[0010] The electric cylinder is arranged below the auxiliary rocker and is movably connected to the middle of the auxiliary rocker. The electric cylinder drives the auxiliary rocker to swing back and forth periodically within a set angle along the lower support point. During the periodic reciprocating swing of the auxiliary rocker, the connecting beam remains in a vertical state.

[0011] The counterweight is connected to the connecting beam, and the height of the counterweight does not exceed the height of the hinged position between the auxiliary rocker and the connecting beam.

[0012] Furthermore, the upper support points and the lower support points are arranged correspondingly up and down in the vertical direction.

[0013] Furthermore, a height adjustment device for adjusting the height of the counterweight is connected between the counterweight and the connecting beam.

[0014] Furthermore, a connecting rod is connected between the counterweight and the height adjustment device. The height adjustment device is installed at a position close to the upper end of the connecting beam, and the counterweight extends downward through the connecting rod.

[0015] Furthermore, the connecting rod is arranged on one side of the connecting beam, and a guide and limiting device is also provided on the side of the connecting beam corresponding to the connecting rod, which is used when the height adjustment device pulls the connecting rod to move.

[0016] Furthermore, an extension portion is vertically arranged at the upper end of the connecting beam relative to the connecting beam, and the height adjustment device is installed below the extension portion.

[0017] Furthermore, a cavity is provided along the length direction of the connecting beam, the cavity has an opening near the lower end of the connecting beam, the height adjustment device is installed in the cavity near the upper end of the connecting beam, and one end of the connecting rod is inserted into the cavity from the opening and connected to the height adjustment device.

[0018] Furthermore, the height adjustment device is an electric hoist, a hand hoist or a lead screw.

[0019] Furthermore, the guide and limiting device includes a guide groove, a guide hole, a guide rail, and a guide wheel.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The utility model increases the overall stability of the oil pump during use by lowering the installation height of the counterweight, avoids instability of the oil pump due to excessively high counterweight, and thus reduces the risk of tipping over of the oil pump.

[0022] 2. The utility model uses a double rocker structure formed by a rocker and an auxiliary rocker in conjunction with a connecting beam and a bracket to form a quadrilateral structure, so that during the use of the oil pump, the counterweight can move up and down along with the connecting beam, further avoiding the problem of the counterweight swinging with the rocker swinging after the installation height is lowered or the increase in the length of the force arm between the counterweight and the electric cylinder, avoiding safety hazards caused by the swing of the counterweight, and avoiding the problem of damage to the electric cylinder due to the increase of the force arm.

[0023] 3. The utility model realizes the adjustment of the height of the counterweight through the height adjustment device. In addition, the counterweight can be dropped to the ground or other supports through the height adjustment device, which is convenient for disassembly and maintenance of the electric cylinder and the influence of the counterweight. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a double-beam electric cylinder oil pumping unit in Example 1 of the utility model.

[0025] Figure 2 It is a schematic diagram of the auxiliary beam swinging to a high position during the operation of the double-beam electric cylinder oil pumping unit in Example 1 of the utility model.

[0026] Figure 3 It is a schematic diagram of the auxiliary beam swinging to a low position during the operation of the double-beam electric cylinder pumping unit in Example 1 of the utility model.

[0027] Figure 4 It is a structural schematic diagram of a double-beam electric cylinder oil pumping unit in Embodiment 2 of the present utility model.

[0028] Figure 5 It is a schematic diagram of the setting of the guide hole in Example 2 of the utility model.

[0029] Figure 6 It is a schematic diagram of the guide groove arrangement in Example 2 of the utility model.

[0030] Figure 7 It is a schematic diagram of the setting of the guide rail in Example 2 of the utility model.

[0031] Figure 8 It is a schematic diagram of the guide wheel arrangement in Example 2 of the utility model.

[0032] Fig. 9 It is a structural schematic diagram of a double-beam electric cylinder oil pumping unit in Example 3 of the utility model.

[0033] Fig.10 It is a structural schematic diagram of a double-beam electric cylinder oil pumping unit in Example 4 of the utility model.

[0034] In the figure, 1, bracket; 2, rocker beam; 3, donkey head; 4, connecting beam; 5, auxiliary rocker beam; 6, counterweight; 7, electric cylinder; 9, electric hoist; 10; guide limit device; 11, screw; 4-1, extension part; 42, cavity; 6-1, connecting rod; 1-1, upper support point; 1-2, lower support point; 1-3, base; 11-1, motor; 11-2, screw nut; 11-3, screw. DETAILED DESCRIPTION

[0035] The technical solution of the utility model is further described below in conjunction with specific implementation methods:

[0036] Example 1

[0037] A double-beam electric cylinder oil pumping unit comprises a bracket 1, a beam 2, a donkey head 3, a connecting beam 4, an auxiliary beam 5, an electric cylinder 7, and a counterweight 6. Figure 1 As shown:

[0038] The bracket 1 includes an upper support point 1-1 and a lower support point 1-2. The upper support point 1-1 is arranged above the lower support point 1-2. The upper support point 1-1 and the lower support point 1-2 are arranged vertically in correspondence with each other. The middle part of the walking beam 2 is hingedly connected to the upper support point 1-1, and one end of the auxiliary walking beam 5 is hingedly connected to the lower support point 1-2.

[0039] The donkey head 3 is fixed at one end of the walking beam 2, and the donkey head 3 pulls the cable to drive the deep well pump to operate and pump oil. The other end of the walking beam 2 and the other end of the auxiliary walking beam 5 are respectively hingedly connected to the connecting beam 4, and the walking beam 2 and the auxiliary walking beam 5 are arranged in parallel;

[0040] The electric cylinder 7 is arranged below the auxiliary walking beam 5, and can also be a pneumatic cylinder or a hydraulic cylinder, preferably an electric cylinder. The electric cylinder 7 is a servo electric cylinder disclosed in the utility model patent document with publication number CN208578554U. The electric cylinder realizes traction and pushing of the auxiliary walking beam 5 by telescoping the cylinder body. One end of the electric cylinder 7 is hinged on the ground or the base 1-3 of the bracket 1, and the other end of the electric cylinder 7 is hinged to the middle part of the auxiliary walking beam 5. As a preferred embodiment, the position where the electric cylinder 7 is hinged to the auxiliary walking beam is located in the middle part of the auxiliary walking beam 5 close to one side of the connecting beam 4. The electric cylinder 7 causes the auxiliary walking beam 5 to periodically reciprocate within a set angle along the lower support point 1-2 through telescopic movement. During the periodic reciprocating swing of the auxiliary walking beam, the connecting beam 4 remains in a vertical state. There are mainly three critical points in the process of the auxiliary walking beam 5 performing periodic reciprocating swing along the lower support point 1-2. The first critical point is when the auxiliary walking beam 5 is in a horizontal position, such as Figure 1 As shown; the second critical point is that the auxiliary beam 5 swings upward to a high position relative to the lower support point 1-2, such as Figure 2 As shown; the third critical point is that the auxiliary beam 5 swings downward to a low position relative to the lower support point 1-2, such as Figure 3 As shown, the swing angles of the auxiliary beam 5 between the low position and the horizontal position and between the horizontal position and the high position are both less than 90°. The counterweight is fixedly connected to the lower end of the connecting beam, or can be hingedly connected, connected by ropes, hooks, etc. The center of gravity height of the counterweight 6 does not exceed the height of the hinge position between the auxiliary beam and the connecting beam. The counterweight, such as a steel counterweight, can be spherical, square, cylindrical, etc., or can be an irregular special-shaped structure. In this embodiment, the counterweight is fixedly connected to the connecting beam, and the counterweight is spherical.

[0041] Example 2

[0042] A double-beam electric cylinder oil pumping unit comprises a bracket 1, a beam 2, a donkey head 3, a connecting beam 4, an auxiliary beam 5, an electric cylinder 7, and a counterweight 6. Figure 4 As shown:

[0043] The bracket 1 includes an upper support point 1-1 and a lower support point 1-2. The upper support point 1-1 is arranged above the lower support point 1-2. The upper support point 1-1 and the lower support point 1-2 are arranged vertically in correspondence with each other. The middle part of the walking beam 2 is hingedly connected to the upper support point 1-1, and one end of the auxiliary walking beam 5 is hingedly connected to the lower support point 1-2.

[0044] The donkey head 3 is fixed at one end of the walking beam 2, and the donkey head 3 pulls the cable to drive the deep well pump to operate and pump oil. The other end of the walking beam 2 and the other end of the auxiliary walking beam 5 are respectively hingedly connected to the connecting beam 4, and the walking beam 2 and the auxiliary walking beam 5 are arranged in parallel;

[0045] The electric cylinder 7 is arranged below the auxiliary walking beam 5. The electric cylinder 7 realizes the traction and pushing of the auxiliary walking beam 5 by the extension and contraction of the cylinder body. One end of the electric cylinder 7 is hinged on the ground or the base 1-3 of the bracket 1, and the other end of the electric cylinder 7 is hinged to the middle of the auxiliary walking beam 5. As a preferred embodiment, the position where the electric cylinder 7 is hinged to the auxiliary walking beam is located in the middle of the auxiliary walking beam 5 near one side of the connecting beam 4. The electric cylinder 7 causes the auxiliary walking beam 5 to periodically reciprocate within a set angle along the lower support point 1-2 through telescopic movement. During the periodic reciprocating swing of the auxiliary walking beam, the connecting beam 4 remains in a vertical state.

[0046] An extension portion 4-1 is vertically arranged at the upper end of the connecting beam 4 relative to the connecting beam 4, and a height adjustment device is installed below the extension portion 4-1. The height adjustment device is such as an electric hoist or a hand hoist. In this embodiment, an electric hoist 9 is used to adjust the height of the counterweight 6. A connecting rod 6-1 is also connected between the counterweight 6 and the hand hoist 9, and the counterweight 6 extends downward through the connecting rod 6-1.

[0047] Normally, when the electric cylinder is not pulling or pushing, the weight of the counterweight side needs to be greater than the weight of the donkey head side to ensure that the load on the donkey head side can be balanced when the pump is running. When the electric cylinder 7 needs to be disassembled for maintenance, the counterweight 6 can be lowered by the electric hoist 9 so that the counterweight 6 lands on the ground, base or other supporting structure, and the weight of the counterweight 6 is transferred so that the donkey head 3 can be lowered. The piston of the deep well pump is locked at the wellhead to prevent the piston from further falling. Therefore, the lowering of the donkey head will not have any impact, which is convenient for disassembly and maintenance of the electric cylinder 7. There is no need for manual climbing to disassemble the counterweight. If the counterweight 6 is not removed, the side of the electric cylinder 7 will lift up one side of the donkey head due to the existence of the counterweight 6, and the lifting height will exceed the normal donkey head lifting height, which will cause adverse effects such as the piston of the deep well pump pulled by the donkey head to be pulled out or even damaged.

[0048] Preferably, a height adjustment device may be provided on the side of the connecting beam 4 corresponding to the connecting rod, and a guide and limit device 10 may be provided to pull the connecting rod 6-1 when it moves. The connecting rod 6-1 is located on one side of the connecting beam 4. The connecting beam 4 is always in a vertical state during the operation of the oil pump, so the connecting rod 6-1 also always remains in a vertical state. The setting of the guide and limit device can guide and limit the connecting rod when the height adjustment device adjusts the counterweight height, thereby improving the safety and stability of the counterweight height adjustment.

[0049] The guide limit device 10 is a guide groove, a guide hole, a guide rail, a guide wheel, etc. When the guide limit device 10 is a guide hole, Figure 5 As shown, the guide hole is a closed-loop hole, and the connecting rod 6-1 passes through the guide hole; when the guide limit device 10 is a guide groove, as shown in FIG. Figure 6 As shown, the guide groove has an additional opening compared to the guide hole to form a non-closed loop structure; the guide limit device 10 can also be a guide rail arranged in the length direction of the connecting beam, such as Figure 7 As shown, a slider is arranged on the side of the connecting rod corresponding to the guide rail, and the limiting and guiding functions are realized by moving the slider along the guide rail; the guide limiting device 10 can also be a guide wheel installed on the side of the connecting rod, such as Figure 8 As shown, the guide wheel uses an unpowered roller, and a track for the guide wheel to roll is set on the connecting beam corresponding to the guide wheel. The guide wheel rolls along the track to achieve the functions of guiding and limiting.

[0050] Example 3

[0051] A double-beam electric cylinder oil pumping unit comprises a bracket 1, a beam 2, a donkey head 3, a connecting beam 4, an auxiliary beam 5, an electric cylinder 7, and a counterweight 6. Fig. 9 As shown:

[0052] The bracket 1 includes an upper support point 1-1 and a lower support point 1-2. The upper support point 1-1 is arranged above the lower support point 1-2. The upper support point 1-1 and the lower support point 1-2 are arranged vertically in correspondence with each other. The middle part of the walking beam 2 is hingedly connected to the upper support point 1-1, and one end of the auxiliary walking beam 5 is hingedly connected to the lower support point 1-2.

[0053] The donkey head 3 is fixed at one end of the walking beam 2, and the donkey head 3 pulls the cable to drive the deep well pump to operate and pump oil. The other end of the walking beam 2 and the other end of the auxiliary walking beam 5 are respectively hingedly connected to the connecting beam 4, and the walking beam 2 and the auxiliary walking beam 5 are arranged in parallel;

[0054] The electric cylinder 7 is arranged below the auxiliary walking beam 5. The electric cylinder 7 realizes the traction and pushing of the auxiliary walking beam 5 by the extension and contraction of the cylinder body. One end of the electric cylinder 7 is hinged on the ground or the base 1-3 of the bracket 1, and the other end of the electric cylinder 7 is hinged to the middle of the auxiliary walking beam 5. As a preferred embodiment, the position where the electric cylinder 7 is hinged to the auxiliary walking beam is located in the middle of the auxiliary walking beam 5 near one side of the connecting beam 4. The electric cylinder 7 causes the auxiliary walking beam 5 to periodically reciprocate within a set angle along the lower support point 1-2 through telescopic movement. During the periodic reciprocating swing of the auxiliary walking beam, the connecting beam 4 remains in a vertical state.

[0055] The upper end of the connecting beam 4 is vertically provided with an extension part 4-1 relative to the connecting beam 4, and a height adjustment device is installed below the extension part 4-1. The height adjustment device is a screw 11, which is composed of several main parts: a motor 11-1, a screw nut 11-2, and a screw 11-3. The motor 11-1 is installed below the extension part 4-1. The motor 11-1 is connected to the screw 11-3 by transmission. During the rotation of the screw 11-3, the screw nut 11-2 moves relative to the screw 11-3, so that the screw nut 11-2 and the connecting rod 6 are connected. -1 connection, the connecting rod 6-1 is further connected to the counterweight 6, and a guide limit device 10 is set on the side of the connecting beam. In addition to limiting and guiding, the guide limit device 10 also needs to prevent the connecting rod from deflecting in this embodiment to ensure that the screw can operate normally. For example, the guide hole is set to a square, and the connecting rod is set with a plane corresponding to the square guide hole, thereby limiting the rotation of the connecting rod connected to the screw nut, and the height adjustment of the counterweight 6 is achieved during the movement of the screw nut 11-2 relative to the screw 11-3.

[0056] Example 4

[0057] A double-beam electric cylinder oil pumping unit comprises a bracket 1, a beam 2, a donkey head 3, a connecting beam 4, an auxiliary beam 5, an electric cylinder 7, and a counterweight 6. Fig.10 As shown:

[0058] The bracket 1 includes an upper support point 1-1 and a lower support point 1-2. The upper support point 1-1 is arranged above the lower support point 1-2. The upper support point 1-1 and the lower support point 1-2 are arranged vertically in correspondence with each other. The middle part of the walking beam 2 is hingedly connected to the upper support point 1-1, and one end of the auxiliary walking beam 5 is hingedly connected to the lower support point 1-2.

[0059] The donkey head 3 is fixed at one end of the walking beam 2, and the donkey head 3 pulls the cable to drive the deep well pump to operate and pump oil. The other end of the walking beam 2 and the other end of the auxiliary walking beam 5 are respectively hingedly connected to the connecting beam 4, and the walking beam 2 and the auxiliary walking beam 5 are arranged in parallel;

[0060] The electric cylinder 7 is arranged below the auxiliary walking beam 5. The electric cylinder 7 realizes the traction and pushing of the auxiliary walking beam 5 by the extension and contraction of the cylinder body. One end of the electric cylinder 7 is hinged on the ground or the base 1-3 of the bracket 1, and the other end of the electric cylinder 7 is hinged to the middle of the auxiliary walking beam 5. As a preferred embodiment, the position where the electric cylinder 7 is hinged to the auxiliary walking beam is located in the middle of the auxiliary walking beam 5 near one side of the connecting beam 4. The electric cylinder 7 causes the auxiliary walking beam 5 to periodically reciprocate within a set angle along the lower support point 1-2 through telescopic movement. During the periodic reciprocating swing of the auxiliary walking beam, the connecting beam 4 remains in a vertical state.

[0061] A cavity 42 is provided in the length direction of the connecting beam 4, and a hole is opened in the cavity 42 near the lower end of the connecting beam 4. A height adjustment device is installed in the cavity 42 near the upper end of the connecting beam 4. In this embodiment, the height adjustment device is an electric hoist 9, and one end of the connecting rod 6-1 is inserted into the cavity 42 through the hole and connected to the height adjustment device. The connecting rod 6-1 is displaced up and down along the cavity 42 by the height adjustment device.

[0062] This embodiment is only a further explanation of the utility model, not a limitation of the utility model. After reading this specification, those skilled in the art can make non-creative modifications to the embodiment as needed, but as long as it is within the scope of the claims of the utility model, it will be protected by the patent law.

Claims

1. A double-beam electric cylinder pumping unit, characterized in that: Including bracket, walking beam, donkey head, connecting beam, auxiliary walking beam, electric cylinder and counterweight; The bracket includes an upper support point and a lower support point, wherein the upper support point is arranged above the lower support point; the middle position of the walking beam is hingedly connected to the upper support point, and one end of the auxiliary walking beam is hingedly connected to the lower support point; The donkey head is fixed to one end of the walking beam, and the other end of the walking beam and the other end of the auxiliary walking beam are respectively hingedly connected to the connecting beam, and the walking beam and the auxiliary walking beam are arranged in parallel; The electric cylinder is arranged below the auxiliary rocker, and is movably connected to the middle of the auxiliary rocker. The electric cylinder drives the auxiliary rocker to swing back and forth periodically within a set angle along the lower support point. During the periodic reciprocating swing of the auxiliary rocker, the connecting beam remains in a vertical state. The counterweight is connected to the connecting beam, and the height of the counterweight does not exceed the height of the hinged position between the auxiliary rocker and the connecting beam.

2. A double-beam electric cylinder pumping unit according to claim 1, characterized in that: The upper support points and the lower support points are arranged correspondingly up and down along the vertical direction.

3. A double-beam electric cylinder pumping unit according to claim 1, characterized in that: A height adjustment device for adjusting the height of the counterweight is connected between the counterweight and the connecting beam.

4. A double-beam electric cylinder pumping unit according to claim 3, characterized in that: A connecting rod is also connected between the counterweight and the height adjustment device. The height adjustment device is installed at a position close to the upper end of the connecting beam, and the counterweight extends downward through the connecting rod.

5. A double-beam electric cylinder pumping unit according to claim 4, characterized in that: The connecting rod is arranged on one side of the connecting beam, and a guide and limiting device is also arranged on the side of the connecting beam corresponding to the connecting rod, which is used for the height adjustment device to pull the connecting rod to move.

6. A double-beam electric cylinder pumping unit according to claim 3, characterized in that: An extension portion is vertically arranged at the upper end of the connecting beam relative to the connecting beam, and the height adjustment device is installed below the extension portion.

7. The double-beam electric cylinder pumping unit according to claim 4, characterized in that: A cavity is provided along the length direction of the connecting beam, the cavity has an opening near the lower end of the connecting beam, the height adjustment device is installed in the cavity near the upper end of the connecting beam, and one end of the connecting rod is inserted into the cavity from the opening and connected to the height adjustment device.

8. The double-beam electric cylinder pumping unit according to claim 3, characterized in that: The height adjustment device is an electric hoist, a hand chain hoist or a lead screw.

9. The double-beam electric cylinder pumping unit according to claim 5, characterized in that: The guide and limit device comprises a guide groove, a guide hole, a guide slide rail and a guide wheel.

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