Double-connecting rod reversing oil pumping unit and method

Abstract

The present invention discloses a double-link reversing oil pumping unit and method, which are related to the technical field of oil pumping units. The method comprises: a bracket, on which a rotating roller is rotatably connected, on which a wide belt is wound, and on which a connecting frame is fixed; a commutator, which is arranged on the bracket; a counterweight, which is slidably connected to the connecting frame, and on which a sucker rod is installed; a support frame, which has at least two, which are symmetrically distributed and fixed to the bracket, and on which a buffer strip is fixed; a buffer block, the number of which is the same as that of the buffer strip, which is slidably connected to the counterweight, and on which a flexible block is fixed. The present invention moves the buffer block toward the adjacent buffer strip, and when the wide belt breaks, the friction force on which the flexible block is subjected to when falling is increased, thereby slowing down the falling speed of the buffer block and the counterweight, thereby preventing the counterweight from falling too fast to cause damage to the sucker rod, and increasing the maintenance cost of the oil pumping unit.

Description

Technical Field

[0001] The invention relates to the technical field of oil pumping units, and in particular to a double-connecting rod reversing oil pumping unit and a method thereof. Background Art

[0002] The double-link reversing oil pumping unit is an oil pumping equipment with the characteristics of long stroke and low stroke. The double-link oil pumping unit is composed of a bracket, a wide belt, a counterweight block and a rope hanger connecting the sucker rod. The belt of the existing oil pumping unit will naturally age during long-term use, resulting in a decrease in its elasticity, and the double-link oil pumping unit is prone to large vibrations and wear of mechanical parts during operation, which makes the belt easily break due to tension after aging. Once the belt breaks, it will cause the counterweight block to fall quickly, and the sucker rod is generally fixed on the lower side of the counterweight block. Once the counterweight block falls, it will directly impact the sucker rod under it. Since the counterweight block is heavy, the sucker rod is easily bent or even broken after being squeezed by the counterweight block, thereby increasing the maintenance cost of the oil pumping unit. Summary of the invention

[0003] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a double-connecting rod reversing oil pumping unit and method.

[0004] The present invention adopts the following technical solution: a double-connecting rod reversing oil pumping unit, comprising:

[0005] A bracket, wherein a rotating roller is rotatably connected to the bracket, a wide belt is wound around the rotating roller, and the wide belt is fixedly connected to a connecting frame;

[0006] A commutator, disposed on the bracket, for transmitting the wide belt;

[0007] A counterweight block is slidably connected to the connecting frame, and a sucker rod is installed on the counterweight block;

[0008] There are at least two support frames, which are symmetrically distributed and fixed to the bracket, and the support frames are fixed with buffer strips, and the support frames are limitedly matched with the counterweight block;

[0009] Buffer blocks, the number of which is the same as that of the buffer strips, are slidably connected to the counterweight block, an elastic member is fixedly connected between the buffer block and the counterweight block, the buffer block is fixedly connected with a flexible block that is pressed and matched with the adjacent buffer strips, and the buffer block is provided with a plurality of spring pins that are limitedly matched with the counterweight block;

[0010] A trigger assembly is arranged on the counterweight block and is used for controlling the movement of the buffer block.

[0011] Preferably, the distance between the symmetrically distributed buffer strips gradually decreases from top to bottom.

[0012] Preferably, the commutator comprises:

[0013] A motor, fixedly connected to the bracket;

[0014] A reducer is fixedly connected to the bracket, and the output shaft of the motor is drivingly connected to the input shaft of the reducer;

[0015] The rope hanger is fixedly connected to the wide belt, and the rope hanger is connected to the output shaft of the reducer through two connecting rods and a transmission member.

[0016] Preferably, the trigger component comprises:

[0017] A connecting rod is fixedly connected to the connecting frame, a sliding rod is slidably connected in the counterweight block, the connecting rod is sealingly and slidably connected to the sliding rod, and an elastic member is fixedly connected between the sliding rod and the counterweight block;

[0018] The trigger rods, the number of which is the same as that of the buffer bars, are slidably connected to the counterweight block, the trigger rods are pressed and matched with the sliding rods, the trigger rods are fixed with sliding racks, and the sliding racks are slidably matched with the adjacent buffer blocks;

[0019] The first magnetic blocks, the number of which is the same as that of the sliding frames, are arranged on the adjacent sliding frames. The buffer blocks are slidably connected with second magnetic blocks, the second magnetic blocks are magnetically matched with the adjacent first magnetic blocks, and the second magnetic blocks are limitedly matched with the counterweight blocks.

[0020] As a preference, it also includes:

[0021] The number of the flexible plates is the same as that of the sliding frames, and they are fixed to a side of the adjacent sliding frame facing the adjacent buffer block, and the second magnetic block is pressed and matched with the adjacent flexible plate.

[0022] As a preference, it also includes:

[0023] The pressure sensors, the number of which is the same as the number of the support frames, are installed on a side of an adjacent support frame close to an adjacent buffer bar. The pressure sensors are electrically connected to the motor and are squeeze-fitted with the adjacent buffer bar.

[0024] As a preference, it also includes:

[0025] The sliding blocks, the number of which is the same as that of the buffer strips, are fixed to the connecting frame and slide in the counterweight block. The sliding blocks are fixed to a limiting block. The counterweight block is slidably connected to a symmetrically distributed limiting frame. An elastic member is fixed between the limiting frame and the counterweight block. The limiting frame is extruded and matched with the adjacent limiting block. The buffer strip is fixed to an extrusion block extruded and matched with the adjacent sliding frame.

[0026] As a preference, it also includes:

[0027] The third magnetic blocks, the number of which is the same as that of the sliding blocks, are fixed in the counterweight block and are located below the adjacent sliding block. A fourth magnetic block is fixed to one side of the sliding block close to the adjacent third magnetic block, and the third magnetic block is magnetically coupled with the adjacent fourth magnetic block.

[0028] Preferably, the connecting rod is provided with an oil hole, damping fluid is provided in the sliding rod, and a one-way valve is installed in the oil hole.

[0029] Preferably, a method for a double-connecting rod reversing pumping unit is provided, based on the above-mentioned double-connecting rod reversing pumping unit, and the specific steps are as follows:

[0030] Step 1: When the device is needed, the motor, reducer and transmission parts drive two connecting rods at the same time. The two connecting rods drive the wide belt to move around the rotating roller of the bracket through the suspension rope. The wide belt drives the counterweight to move up and down through the connecting frame. The counterweight drives the pumping rod to move up and down to pump oil.

[0031] Step 2: When the wide belt is stretched and deformed, the two sliding blocks drive the connecting frame to move slowly downward, and the third magnetic block attracts the adjacent fourth magnetic block to help the two sliding blocks move downward, so that the connecting rod moves downward relative to the sliding rod, the wide belt is gradually tightened, and the limit frame limits the adjacent limit blocks;

[0032] Step 3: When the wide belt breaks, the elastic member of the sliding rod drives it to move downward and squeezes the two trigger rods to move, and the trigger rod drives the adjacent sliding frame to move, so that the adjacent first magnetic block completely falls into the groove of the adjacent sliding frame, and the upper side of the second magnetic block loses contact with the counterweight block, so that the elastic member of the buffer block pops out and drives it to move;

[0033] Step 4: The buffer block moves and drives the adjacent second magnetic block to move, and the second magnetic block squeezes the adjacent flexible plate to deform;

[0034] Step 5: The buffer block drives the adjacent flexible block to move, so that the flexible block contacts the adjacent buffer strip, and the buffer strip buffers the adjacent flexible block, so that the falling speed of the flexible block is slowed down, and the falling speed of the buffer block and the counterweight block is also slowed down synchronously;

[0035] Step 6: When the counterweight falls to the limit position, the flexible block squeezes the adjacent buffer strips, the pressure sensor is pressurized and sends a command to the external control terminal, and the external control terminal controls the output shaft of the motor to stop rotating;

[0036] Step 7: When it is necessary to stop using the device, turn off the motor through the external control terminal. If the wide belt is broken, replace the wide belt and repair the device for the next use.

[0037] The advantages and positive effects of the present invention compared with the prior art are as follows: 1. The present invention moves the buffer block to the adjacent buffer strip, and when the wide belt breaks, the friction force on the flexible block when it falls is increased, thereby slowing down the falling speed of the buffer block and the counterweight block, thereby preventing the counterweight block from falling too fast to cause damage to the pumping rod, resulting in increased maintenance costs for the pumping unit;

[0038] 2. By arranging a flexible plate between the sliding frame and the adjacent buffer block, when the first magnetic block is worn, the second magnetic block moves downward to squeeze the adjacent flexible plate, and the deformation of the flexible plate provides the second magnetic block with a margin for upward and downward movement, thereby preventing the second magnetic block from being stuck in the groove of the adjacent sliding frame, thereby avoiding the second magnetic block from being worn after long-term use, resulting in difficulty in triggering the parts, and further affecting the buffering effect of the counterweight block;

[0039] 3. By moving the connecting rod downward relative to the sliding rod, the wide belt is adaptively pulled during the use of the pumping unit to always keep the wide belt taut, thereby preventing the wide belt from stretching and lengthening, causing the height position of the sucker rod to change during oil pumping, thereby affecting the normal use of the sucker rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0041] Figure 2 It is a three-dimensional structural cross-sectional view of the bracket of the present invention;

[0042] Figure 3 It is a schematic diagram of the three-dimensional structure of the counterweight block of the present invention;

[0043] Figure 4 It is a three-dimensional structural cross-sectional view of the buffer strip of the present invention;

[0044] Figure 5 It is a three-dimensional structural cross-sectional view of the counterweight block of the present invention;

[0045] Figure 6 It is a schematic diagram of the three-dimensional structure of the connecting rod and the sliding rod of the present invention;

[0046] Figure 7 It is a schematic diagram of the three-dimensional structure of the first magnetic block and the second magnetic block of the present invention;

[0047] Figure 8 It is a three-dimensional structural schematic diagram of the limiting block and the limiting frame of the present invention;

[0048] Fig. 9 It is a schematic diagram of the three-dimensional structure of the oil hole of the present invention.

[0049] Parts names and serial numbers in the figure: 1- bracket, 101- wide belt, 102- connecting frame, 2- commutator, 201- motor, 202- reducer, 203- transmission member, 204- connecting rod, 205- rope hanger, 3- counterweight, 4- supporting frame, 401- buffer strip, 402- buffer block, 403- flexible block, 5- trigger assembly, 501- connecting rod, 502- sliding rod, 503- trigger rod, 504- sliding frame, 505- first magnetic block, 506- second magnetic block, 6- flexible plate, 7- pressure sensor, 8- sliding block, 801- limit block, 802- limit frame, 803- extrusion block, 9- third magnetic block, 901- fourth magnetic block, 10- oil hole. DETAILED DESCRIPTION

[0050] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0051] Example 1: Reference Figure 1-Figure 9, a double-link reversing oil pumping unit is provided, which is used to prevent the counterweight from falling quickly after the belt breaks, causing damage to the oil pumping unit. The unit includes a bracket 1, which is constructed of high-strength steel to ensure the overall structural strength of the device. The upper part of the bracket 1 is rotatably connected to a rotating roller, on which a wide belt 101 is wound. The wide belt 101 is relatively wide to increase the contact area between the wide belt 101 and the rotating roller, thereby improving its transmission efficiency. The wide belt 101 is fixedly connected to a connecting frame 102; a commutator 2 is arranged on the bracket 1 and is used to drive the wide belt 101; a counterweight 3 is slidably connected to the connecting frame 102. The connecting frame 102 is made of high-strength steel to ensure the stability of the connection between the counterweight 3 and the wide belt 101. 3 is equipped with a sucker rod. During the pumping process, the sucker rod will generate periodic unbalanced forces when it reciprocates up and down. The counterweight block 3 offsets these unbalanced forces through its own weight, thereby preventing the wide belt 101 from deflecting due to uneven force, thereby reducing the relative friction between the wide belt 101 and the rotating roller, and reducing the risk of the wide belt 101 breaking; the support frame 4 has at least two, which are symmetrically distributed and fixed to the support frame 1. The support frame 4 is fixed with a flexible buffer strip 401. The support frame 4 is limitedly matched with the counterweight block 3 to support the counterweight block 3 after the wide belt 101 breaks and causes the counterweight block 3 to fall, thereby limiting the maximum falling distance of the counterweight block 3; the buffer blocks 402, the number of which is the same as the buffer strips 401, slide It is dynamically connected to the counterweight block 3, and an elastic member is fixed between the buffer block 402 and the counterweight block 3, wherein the elastic member is a spring and is initially in a force storage state, and the buffer block 402 is fixed with a flexible block 403 that is squeezed and matched with the adjacent buffer strip 401, and the buffer block 402 is provided with a plurality of spring pins that are limited and matched with the counterweight block 3, and the spring pin is an existing structure, and the spring pin is composed of a spring and a limit pin, and the upper spring is located in the adjacent buffer block 402, and the limit pin slides in the adjacent buffer block 402, and when the spring pin is in contact with the counterweight block 3, the limit pin is pressed into the adjacent buffer block 402, and after the spring pin loses contact with the counterweight block 3, the spring drives the limit pin to pop out, and the trigger component 5 is arranged on the counterweight block 3, and is used to trigger the buffer block 4 when the wide belt 101 breaks. 02 moves toward the adjacent buffer strip 401, so that the flexible block 403 is pressed against the adjacent buffer strip 401 to increase the friction force on the flexible block 403 when it falls, and slow down the falling speed of the buffer block 402 and the counterweight block 3, thereby preventing the counterweight block 3 from falling too fast and causing damage to the sucker rod, which affects the normal use of the sucker rod. The symmetrically distributed buffer strips 401 are respectively located on both sides of the counterweight block 3, and the distance between the symmetrically distributed buffer strips 401 gradually decreases from top to bottom, so that the friction force on the flexible block 403 when it falls gradually increases, and the falling speed of the flexible block 403 is gradually slowed down, thereby decelerating the counterweight block 3, preventing the counterweight block 3 from losing control during the falling process, and ensuring the stability of the counterweight block 3 during the falling process.

[0052] The commutator 2 includes: a motor 201 electrically connected to an external control terminal, fixedly connected to the bracket 1; a reducer 202, fixedly connected to the bracket 1, the output shaft of the motor 201 is driven by the input shaft of the reducer 202, and during the oil pumping process, the reducer 202 converts the high-speed rotation of the output shaft of the motor 201 into a low-speed, high-torque rotation, so that the transmission member 203 moves, thereby driving the sucker rod to move up and down to extract the crude oil in the well; a rope hanger 205, fixedly connected to the wide belt 101, and the rope hanger 205 and the reducer are connected to each other. The output shaft of the speed reducer 202 is transmitted through two connecting rods 204 and a transmission member 203. The suspension rope 205 is slidably connected with symmetrically distributed sliding blocks. The connecting rod 204 is fixedly connected with a rotating sprocket. The transmission member 203 consists of two groups of sprocket chains. Each group of sprocket chains consists of a driving sprocket on the lower side, a driven sprocket and a chain on the upper side. The driving sprocket is fixedly connected to the output shaft of the speed reducer 202, and the chain is meshed with the rotating sprocket of the adjacent connecting rod 204. The connecting rod 204 is rotationally connected to the adjacent sliding blocks on the suspension rope 205.

[0053] The trigger assembly 5 includes: a connecting rod 501, which is fixedly connected to the connecting frame 102, and a sliding rod 502 is slidably connected in the counterweight block 3. The connecting rod 501 and the sliding rod 502 are sealed and slidably connected. The lower part of the sliding rod 502 is a truncated cone block with a thin end facing downward. An elastic member is fixedly connected between the sliding rod 502 and the counterweight block 3, wherein the elastic member is a compression spring and is initially in a force storage state; a trigger rod 503, the number of which is the same as that of the buffer strip 401, is slidably connected in the counterweight block 3, the trigger rod 503 is squeezed and matched with the sliding rod 502, and the part of the trigger rod 503 close to the sliding rod 502 is provided with an inclined surface, and the elastic member storing force between the sliding rod 502 and the counterweight block 3 pops out. After the sliding rod 502 falls, the sliding rod 502 squeezes the two trigger rods 503, so that the two trigger rods 503 move back to back, and the trigger rod 503 is fixedly connected to the sliding frame 504, and the sliding frame 504 Slidingly matched with the adjacent buffer block 402; the first magnetic block 505, the number of which is the same as that of the sliding frame 504, is arranged on the adjacent sliding frame 504, the sliding frame 504 is provided with a groove, the maximum depth of the groove is the same as the height of the adjacent first magnetic block 505, and a shoulder with an inclined surface is provided in the groove of the sliding frame 504, which is used to move the first magnetic block 505 upward along the inclined surface of the shoulder in the groove to reset when the sliding frame 504 moves toward the direction of the sliding rod 502 to reset, and a second magnetic block 506 is slidably connected in the buffer block 402, the second magnetic block 506 is magnetically matched with the adjacent first magnetic block 505, the second magnetic block 506 is limited by the counterweight block 3, the height of the second magnetic block 506 is the same as the height of the adjacent buffer block 402, and when the upper side of the second magnetic block 506 exceeds the upper plane of the buffer block 402, the second magnetic block 506 is limited by the counterweight block 3.

[0054] Working process: when it is necessary to use this device for oil pumping, the motor 201 is turned on through the external control terminal, and the output shaft of the motor 201 transmits the transmission member 203 through the reducer 202, and the transmission member 203 simultaneously transmits the two connecting rods 204 to rotate, and the connecting rod 204 cooperates with the sliding block on the rope hanger 205 to slide during the rotation process, so that the connecting rod 204 moves around the sprocket chain, and the two connecting rods 204 drive the rope hanger 205 to move up and down, and the rope hanger 205 drives the wide belt 101 to move around the rotating roller of the bracket 1, and the wide belt 101 drives the counterweight block 3 to move up and down through the connecting frame 102, and the counterweight block 3 drives the pumping rod to move up and down to pump oil. During use, the wide belt 101 rubs against the rotating roller. If things go on like this, the wide belt 101 will be at risk of breaking. Once the wide belt 101 breaks, the counterweight block 3 will drive the pumping rod to fall. At the same time, the connecting frame 102 is no longer pulled by the wide belt 101, and the sliding rod 502 The elastic part between the counterweight block 3 pops out, and the sliding rod 502 squeezes the two trigger rods 503 to move. The trigger rod 503 drives the adjacent sliding frame 504 to move, so that the adjacent first magnetic block 505 falls completely into the groove of the adjacent sliding frame 504, the first magnetic block 505 and the adjacent second magnetic block 506 move downward, and the lower side surface of the second magnetic block 506 moves to be flush with the lower side surface of the adjacent buffer block 402, and the upper side surface of the second magnetic block 506 loses contact with the counterweight block 3, and the elastic part of the buffer block 402 pops out and drives it to move, and the buffer block 402 drives the adjacent flexible block 403 to move, so that the flexible block 403 contacts the adjacent buffer strip 401, and the buffer strip 401 rubs the adjacent flexible block 403, so that the falling speed of the flexible block 403 is slowed down, and the falling speed of the buffer block 402 and the counterweight block 3 will also be slowed down synchronously, thereby preventing the counterweight block from falling too fast to cause damage to the sucker rod, which in turn increases the maintenance cost and labor cost of the oil pumping unit.

[0055] When it is necessary to stop using the device for oil pumping, the motor 201 is turned off through the external control terminal. If the wide belt 101 is broken, the motor 201 is also turned off through the external control terminal, and then the wide belt 101 is replaced and the device is repaired. Then, the buffer block 402 is pushed to reset, so that the elastic part of the buffer block 402 is compressed, and the buffer block 402 drives the adjacent second magnetic block 506 to move. After the second magnetic block 506 moves to align with the adjacent first magnetic block 505, the second magnetic block 506 absorbs the adjacent first magnetic block 505, and then pushes the sliding frame 504 to reset. The inclined surface of the groove shoulder of the sliding frame 504 squeezes the adjacent first magnetic block 505 to move upward and reset, and the first magnetic block 505 drives the adjacent second magnetic block 506 to move upward and reset, and the sliding frame 504 squeezes the trigger rod 503 to reset, so as to facilitate the next use.

[0056] Embodiment 2: Based on the above embodiment, refer to Figure 7, also includes: flexible plates 6, the number of which is the same as that of the sliding frame 504, fixedly connected to the side of the adjacent sliding frame 504 facing the adjacent buffer block 402, the second magnetic block 506 is squeezed and matched with the adjacent flexible plate 6, and the second magnetic block 506 is provided with an inclined surface near the adjacent flexible plate 6. If the first magnetic block 505 is worn out during long-term use, the height of the first magnetic block 505 becomes lower, and the contact surface between the second magnetic block 506 and the adjacent first magnetic block 505 cannot be aligned with the contact surface between the sliding frame 504 and the adjacent buffer block 402. When the second magnetic block 506 moves relative to the adjacent first magnetic block 505, the second magnetic block 506 squeezes the adjacent flexible plate 6 through its inclined surface, so that the flexible plate 6 is deformed under pressure, and the deformation of the flexible plate 6 prevents the adjacent second magnetic block 506 from being stuck in the groove of the adjacent sliding frame 504.

[0057] Embodiment 3: Based on the above embodiment, refer to Figure 4 , also includes: pressure sensors 7 electrically connected to the external control terminal, the number of which is the same as the number of support frames 4, installed on the side of the adjacent support frame 4 close to the adjacent buffer strip 401, the pressure sensor 7 is electrically connected to the motor 201, the pressure sensor 7 is squeezed and matched with the adjacent buffer strip 401, and after the counterweight block 3 moves downward to the extreme position (that is, after the lower side of the counterweight block 3 contacts the two support frames 4), the flexible block 403 is aligned with the pressure sensor 7. If the wide belt 101 breaks at this time, the flexible block 403 squeezes the adjacent buffer strip 401, which will cause the pressure sensor 7 to be compressed, and the pressure sensor 7 sends an instruction to the external control terminal, and the external control terminal controls the output shaft of the motor 201 to stop rotating to prevent the output shaft of the motor 201 from still rotating after the wide belt 101 breaks, thereby preventing the transmission member 203 from continuing to rotate and interfering with the broken wide belt 101, causing the transmission member 203 to be entangled by the broken wide belt 101 and damaged, thereby increasing the maintenance cost of the device.

[0058] Embodiment 4: Based on the above embodiment, refer to Figure 4 , Figure 5 , Figure 8 and Fig. 9 , and also includes: sliding blocks 8, the number of which is the same as that of the buffer strips 401, which are fixed to the connecting frame 102 and slide in the counterweight block 3, the sliding blocks 8 are fixed to the limiting blocks 801, and the counterweight block 3 is slidably connected with symmetrically distributed limiting frames 802, the limiting frames 802 are squeezed and matched with adjacent limiting blocks 801, the limiting frames 802 are provided with a plurality of wedge-shaped portions, an elastic member is fixed between the limiting frames 802 and the counterweight block 3, wherein the elastic member is a spring, the buffer strip 401 is fixed with an extrusion block 803 which is squeezed and matched with the adjacent sliding frame 504, the extrusion block 803 is flexible, and after the counterweight block 3 moves downward to the extreme position, the extrusion block 803 and the adjacent sliding frame 504 are at the same horizontal height.

[0059] It also includes: third magnetic blocks 9, the number of which is the same as that of the sliding blocks 8, which are fixed in the counterweight block 3 and are located below the adjacent sliding blocks 8. A fourth magnetic block 901 is fixed to the side of the sliding block 8 close to the adjacent third magnetic block 9. The third magnetic block 9 cooperates with the adjacent fourth magnetic block 901 by magnetic attraction. The connecting rod 501 is provided with an oil hole 10, and damping fluid is provided in the sliding rod 502. A one-way valve is installed in the oil hole 10. When the connecting rod 501 moves downward, the one-way valve opens to connect the upper and lower sides of the oil hole 10. When the connecting rod 501 moves upward, the one-way valve closes.

[0060] Working process: after the wide belt 101 is stretched and deformed, the counterweight block 3 moves downward to the limit position, and the two sliding blocks 8 drive the connecting frame 102 to move slowly downward. The third magnetic block 9 assists the two sliding blocks 8 to move downward by absorbing the adjacent fourth magnetic block 901. The connecting frame 102 drives the wide belt 101 to move downward and gradually tighten. At this time, the squeezing block 803 is aligned with the adjacent sliding frame 504 and squeezes each other, so that the sliding frame 504 cannot move in the direction of the adjacent buffer strip 401, and the sliding rod 502 cannot squeeze the two trigger rods 503 to move. Therefore, the connecting rod 501 moves slowly downward and its one-way valve strikes the flow. The damping fluid on the lower side of the connecting rod 501 flows to its upper side through the oil hole 10. At the same time, the sliding block 8 drives the adjacent limit block 801 to move downward. The limit block 801 squeezes the adjacent limit frame 802 to move. The limit block 801 passes through several wedge-shaped parts of the adjacent limit frame 802 in sequence, and then the limit block 801 is stuck by the adjacent wedge-shaped part of the adjacent limit frame 802 and cannot be reset, so that the connecting rod 501 moves downward relative to the sliding rod 502, and the wide belt 101 is gradually tightened, thereby preventing the wide belt 101 from stretching and lengthening to cause the vertical height of the sucker rod to change, thereby affecting the normal use of the sucker rod.

[0061] Embodiment 5: Based on the above embodiment, refer to Figure 1-Figure 9 A method for a double-connecting rod reversing pumping unit, based on the above-mentioned double-connecting rod reversing pumping unit, has the following specific steps:

[0062] Step 1: When the device needs to be used, the two connecting rods 204 are driven simultaneously by the motor 201, the reducer 202 and the transmission member 203. The two connecting rods 204 drive the wide belt 101 to move around the rotating roller of the bracket 1 through the suspension rope 205. The wide belt 101 drives the counterweight block 3 to move up and down through the connecting frame 102. The counterweight block 3 drives the sucker rod to move up and down to pump oil;

[0063] Step 2: After the wide belt 101 is stretched and deformed, the two sliding blocks 8 drive the connecting frame 102 to slowly move downward, and the third magnetic block 9 attracts the adjacent fourth magnetic block 901 to assist the two sliding blocks 8 to move downward, so that the connecting rod 501 moves downward relative to the sliding rod 502, the wide belt 101 is gradually tightened, and the limiting frame 802 limits the adjacent limiting blocks 801;

[0064] Step 3: When the wide belt 101 breaks, the elastic member of the sliding rod 502 drives it to move downward and squeezes the two trigger rods 503 to move, and the trigger rod 503 drives the adjacent sliding frame 504 to move, so that the adjacent first magnetic block 505 completely falls into the groove of the adjacent sliding frame 504, and the upper side of the second magnetic block 506 loses contact with the counterweight block 3, so that the elastic member of the buffer block 402 pops out and drives it to move;

[0065] Step 4: The buffer block 402 moves and drives the adjacent second magnetic block 506 to move, and the second magnetic block 506 squeezes the adjacent flexible plate 6 to deform;

[0066] Step 5: The buffer block 402 drives the adjacent flexible block 403 to move, so that the flexible block 403 contacts the adjacent buffer strip 401. The buffer strip 401 buffers the adjacent flexible block 403, so that the falling speed of the flexible block 403 is slowed down, and the falling speeds of the buffer block 402 and the counterweight block 3 are also slowed down synchronously;

[0067] Step 6: When the counterweight 3 falls to the limit position, the flexible block 403 squeezes the adjacent buffer strip 401, the pressure sensor 7 is pressurized and sends a command to the external control terminal, and the external control terminal controls the output shaft of the motor 201 to stop rotating;

[0068] Step 7: When the device needs to be stopped, the motor 201 is turned off through the external control terminal. If the wide belt 101 is broken, the wide belt 101 is replaced and the device is repaired for the next use.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-connecting rod reversing oil pumping unit, characterized in that: include: A bracket (1), the bracket (1) being rotatably connected to a rotating roller, a wide belt (101) being wound around the rotating roller, and the wide belt (101) being fixedly connected to a connecting frame (102); A commutator (2) is arranged on the bracket (1) and is used to drive the wide belt (101); A counterweight block (3) is slidably connected to the connecting frame (102), and a sucker rod is installed on the counterweight block (3); The support frames (4) have at least two parts and are symmetrically distributed and fixedly connected to the support (1); the support frames (4) are fixedly connected with buffer strips (401); the support frames (4) are limitedly matched with the counterweight block (3); Buffer blocks (402), the number of which is the same as that of the buffer strips (401), are slidably connected to the counterweight block (3), an elastic member is fixedly connected between the buffer block (402) and the counterweight block (3), the buffer block (402) is fixedly connected with a flexible block (403) which is pressed and matched with the adjacent buffer strips (401), and the buffer block (402) is provided with a plurality of spring pins which are limitedly matched with the counterweight block (3); A trigger component (5) is arranged on the counterweight block (3) and is used to control the movement of the buffer block (402); The trigger assembly (5) comprises: a connecting rod (501) fixedly connected to the connecting frame (102); a sliding rod (502) slidably connected inside the counterweight (3); the connecting rod (501) and the sliding rod (502) are sealed and slidably connected; and an elastic member is fixedly connected between the sliding rod (502) and the counterweight (3); The trigger rod (503) has the same number as the buffer strips (401), and is slidably connected to the counterweight block (3). The trigger rod (503) is pressed and matched with the sliding rod (502). The trigger rod (503) is fixedly connected to a sliding frame (504), and the sliding frame (504) is slidably matched with the adjacent buffer block (402); The first magnetic blocks (505) are the same in number as the sliding frames (504) and are arranged on the adjacent sliding frames (504). The buffer block (402) is slidably connected with the second magnetic block (506). The second magnetic block (506) is magnetically engaged with the adjacent first magnetic block (505). The second magnetic block (506) is limitedly engaged with the counterweight block (3).

2. A double-connecting rod reversing oil pumping unit according to claim 1, characterized in that: The distance between the symmetrically distributed buffer strips (401) gradually decreases from top to bottom.

3. A double-connecting rod reversing oil pumping unit according to claim 2, characterized in that: The commutator (2) comprises: A motor (201) is fixedly connected to the bracket (1); A reducer (202) is fixedly connected to the bracket (1), and the output shaft of the motor (201) is drivingly connected to the input shaft of the reducer (202); The rope hanger (205) is fixedly connected to the wide belt (101), and the rope hanger (205) is connected to the output shaft of the reducer (202) through two connecting rods (204) and a transmission member (203).

4. A double connecting rod reversing oil pumping unit according to claim 3, characterized in that include: The number of the flexible plates (6) is the same as that of the sliding frames (504), and they are fixed to a side of the adjacent sliding frame (504) facing the adjacent buffer block (402), and the second magnetic block (506) is pressed and matched with the adjacent flexible plate (6).

5. A double connecting rod reversing oil pumping unit according to claim 4, characterized in that include: The pressure sensors (7) are the same in number as the support frames (4) and are installed on a side of an adjacent support frame (4) close to an adjacent buffer bar (401). The pressure sensors (7) are electrically connected to the motor (201), and the pressure sensors (7) are squeeze-fitted with the adjacent buffer bar (401).

6. A double connecting rod reversing oil pumping unit according to claim 5, characterized in that include: The sliding blocks (8) are the same in number as the buffer strips (401), are fixedly connected to the connecting frame (102), and slide in the counterweight block (3); the sliding blocks (8) are fixedly connected to the limiting blocks (801); the counterweight block (3) is slidably connected to symmetrically distributed limiting frames (802); an elastic member is fixedly connected between the limiting frames (802) and the counterweight block (3); the limiting frames (802) are extruded and matched with adjacent limiting blocks (801); and the buffer strip (401) is fixedly connected to an extrusion block (803) extruded and matched with adjacent sliding frames (504).

7. A double connecting rod reversing oil pumping unit according to claim 6, characterized in that include: The third magnetic blocks (9) are the same in number as the sliding blocks (8) and are fixedly connected to the counterweight block (3) and are located below the adjacent sliding block (8). A fourth magnetic block (901) is fixedly connected to a side of the sliding block (8) close to the adjacent third magnetic block (9). The third magnetic block (9) is magnetically coupled to the adjacent fourth magnetic block (901).

8. A double-connecting rod reversing oil pumping unit according to claim 7, characterized in that: The connecting rod (501) is provided with an oil hole (10), damping fluid is provided in the sliding rod (502), and a one-way valve is installed in the oil hole (10).

9. A method for a double-connecting rod reversing oil pumping unit, characterized in that: According to the double-connecting rod reversing pumping unit of claim 8, the specific method of use is as follows: Step 1: When the device is to be used, the two connecting rods (204) are driven simultaneously by the motor (201), the reducer (202) and the transmission member (203), the two connecting rods (204) drive the wide belt (101) to move around the rotating roller of the bracket (1) through the suspension rope (205), the wide belt (101) drives the counterweight (3) to move up and down through the connecting frame (102), and the counterweight (3) drives the pumping rod to move up and down to pump oil; Step 2: When the wide belt (101) is stretched and deformed, the two sliding blocks (8) drive the connecting frame (102) to move slowly downward, and the third magnetic block (9) assists the two sliding blocks (8) to move downward by absorbing the adjacent fourth magnetic block (901), so that the connecting rod (501) moves downward relative to the sliding rod (502), the wide belt (101) is gradually tightened, and the limiting frame (802) limits the adjacent limiting blocks (801); Step 3: When the wide belt (101) breaks, the elastic member of the sliding rod (502) drives it to move downward and squeezes the two trigger rods (503) to move, and the trigger rod (503) drives the adjacent sliding frame (504) to move, so that the adjacent first magnetic block (505) completely falls into the groove of the adjacent sliding frame (504), and the upper side surface of the second magnetic block (506) loses contact with the counterweight block (3), so that the elastic member of the buffer block (402) pops out and drives it to move; Step 4: the buffer block (402) moves and drives the adjacent second magnetic block (506) to move, and the second magnetic block (506) squeezes the adjacent flexible plate (6) to deform; Step 5: The buffer block (402) drives the adjacent flexible block (403) to move, so that the flexible block (403) contacts the adjacent buffer strip (401), and the buffer strip (401) buffers the adjacent flexible block (403), so that the falling speed of the flexible block (403) slows down, and the falling speeds of the buffer block (402) and the counterweight block (3) also slow down synchronously; Step 6: When the counterweight (3) falls to the limit position, the flexible block (403) squeezes the adjacent buffer strip (401), the pressure sensor (7) is pressurized and sends a command to the external control terminal, and the external control terminal controls the output shaft of the motor (201) to stop rotating; Step 7: When it is necessary to stop using the device, the motor (201) is turned off through the external control terminal. If the wide belt (101) is broken, the wide belt (101) is replaced and the device is repaired for the next use.

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