Multi-bearing synchronous grease injection device for oil field pumping unit and grease injection method of multi-bearing synchronous grease injection device

Abstract

The invention relates to the field of bearing greasing, in particular to a multi-bearing synchronous greasing device for an oil pumping unit in an oil field and a greasing method.The device is characterized in that an arc-shaped groove used for avoiding an arc-shaped groove plate is formed in the outer edge of a piston plate, and a top shielding mechanism used for blocking the arc-shaped groove is arranged on the right side of the piston plate; the oil squeezing mechanism is provided with a linear driving mechanism used for driving the top shielding mechanism to do opening and closing motion. According to the device and method provided by the invention, the arc-shaped groove is formed in the piston plate, so that the situation that grease on the arc-shaped groove plate is reversely driven when the piston plate reversely moves is avoided, pollution is reduced, then the top shielding mechanism is driven to move through the linear driving mechanism, the arc-shaped groove is blocked when the top shielding mechanism forwards moves, and the working efficiency is improved. And the bottom shielding mechanism is arranged, the gap between the piston plate and the oil outlet pipe is blocked through the bottom shielding mechanism, and the situation that more grease is scraped away when the piston plate moves in the reverse direction is avoided.

Description

Technical Field

[0001] This invention relates to the field of bearing grease application, and more specifically to a multi-bearing synchronous grease injection device and its grease injection method for oilfield pumping units. Background Technology

[0002] When using an oil pumping unit, it is necessary to regularly inject grease into the bearings at multiple locations on the unit to ensure that the unit does not jam or wear during the oil pumping process.

[0003] Existing patent application number: CN202111435744.2; discloses an automatic grease injection lubrication device for oilfield pumping units. The discharge mechanism of this invention requires manual adjustment of the grease output of each oil delivery pipe to ensure that the grease injected into shafts of different sizes is of appropriate amount. The operating speed and start-up time of each component are controlled by the control panel to inject grease into shafts of different sizes at regular intervals and in quantitative quantities.

[0004] Although this solution can inject grease into different bearings, when the oil squeezing mechanism pushes the piston plate to reciprocate, during the piston plate's reset movement, the piston plate will carry the grease on the arc groove plate in the opposite direction. Over time, a large amount of grease will accumulate on the side of the arc groove plate near the oil squeezing mechanism, causing contamination to the equipment. Furthermore, during the grease extrusion process, a gap exists between the piston plate and the oil outlet pipe. When the grease is extruded, it will be pushed in the opposite direction along this gap and accumulate on the other side of the piston plate. When the piston plate moves in the opposite direction, it will scrape away more grease. Moreover, since some grease is extruded, it is difficult to control the precision during grease extrusion. As the thickness of the arc groove plate increases, the gap will become larger. Since the wall thickness of traditional pipes is 2mm to 5mm, this will have a significant impact. Summary of the Invention

[0005] (a) Technical problems to be solved This invention provides a multi-bearing synchronous grease injection device and its injection method for oilfield pumping units, avoiding the defects of existing technologies such as jamming and wear of the pumping unit during the oil pumping process, and the need for manual adjustment of the grease output of each oil delivery pipe, which leads to easy contamination of the equipment and difficulty in controlling the precision of grease extrusion.

[0006] (II) Technical Solution To solve the above problems, the present invention provides a multi-bearing synchronous grease injection device for oilfield pumping units, comprising: The oil extraction mechanism includes a rotating mechanism, a grease storage tank, a top shielding mechanism, an arc-shaped groove plate, and an oil outlet pipe. The grease storage tank is fixedly installed on the oil outlet pipe, which has an arc-shaped groove that connects to the grease storage tank. Grease in the grease storage tank enters the oil outlet pipe through the arc-shaped groove. The outer wall of the arc-shaped groove plate is in contact with the inner wall of the oil outlet pipe. Extended ring pipes are provided on both sides of the arc-shaped groove plate, which are driven to rotate by the rotating mechanism. The arc-shaped groove plate rotates synchronously and covers the arc-shaped groove of the oil outlet pipe by rotation. A circular tube is formed between the arc-shaped groove plate and the oil outlet pipe. The oil extraction mechanism is equipped with a piston plate. By pushing the piston plate, the oil extraction mechanism pushes the grease in the oil outlet pipe to move, and the grease can be squeezed into the bearing of the oil pumping unit along the pipe. The piston plate has an arc-shaped groove on its outer edge, which allows it to avoid the arc-shaped groove plate. A top blocking mechanism is located on the right side of the piston plate, which blocks the arc-shaped groove. A linear drive mechanism is provided on the oil squeezing mechanism, which drives the top blocking mechanism to open and close. The arc-shaped groove plate blocks the arc-shaped groove by rotating. A gap is provided between the bottom of the piston plate and the bottom of the oil outlet pipe. A bottom blocking mechanism is located on the left side of the piston plate, which blocks the gap. A reverse drive mechanism is provided on the piston plate, which converts the linear power of the linear drive mechanism into the up-and-down power of the bottom blocking mechanism. The linear drive mechanism synchronously drives the bottom blocking mechanism.

[0007] Preferably, the top blocking mechanism includes a first linear pulling mechanism, a first middle arc plate, a first elastic counter-pull mechanism, and a first side arc plate. Two first elastic counter-pull mechanisms and two first side arc plates are provided. The two first elastic counter-pull mechanisms are fixedly mounted on the piston plate, and the two first side arc plates are respectively fixedly mounted on the two first elastic counter-pull mechanisms. The first elastic counter-pull mechanism can tilt and pull the first side arc plate. A first middle arc plate is installed between the two first side arc plates, with both sides of the first middle arc plate fitting against the inner sides of the two first side arc plates. The two sides of the first middle arc plate are vertical planar structures. One end of the first linear pulling mechanism is connected to a linear drive mechanism, and the other end is connected to the first middle arc plate. The first linear pulling mechanism can convert the power of the linear drive mechanism into a pulling force that moves the first middle arc plate.

[0008] Preferably, the bottom blocking mechanism includes a second linear pulling mechanism, a second middle arc plate, a second elastic counter-pull mechanism, and a second side arc plate. Two second elastic counter-pull mechanisms and two side arc plates are provided. The two second elastic counter-pull mechanisms are fixedly mounted on the piston plate, and the two second side arc plates are respectively fixedly mounted on the two second elastic counter-pull mechanisms. The second elastic counter-pull mechanisms can horizontally pull the second side arc plates. A second middle arc plate is installed between the two second side arc plates, with both sides of the second middle arc plate fitting against the inner sides of the two second side arc plates. The two sides of the second middle arc plate are vertical planar structures. One end of the second linear pulling mechanism is connected to the reverse drive mechanism, and the other end is connected to the second middle arc plate. The second linear pulling mechanism can convert the power of the reverse drive mechanism into a pulling force that moves the second middle arc plate.

[0009] Preferably, the linear drive mechanism includes an electric push rod and a pull rod. The electric push rod is fixedly installed on the oil extrusion mechanism. One end of the pull rod is fixedly connected to the output end of the electric push rod. A limit ring is provided on the pull rod, and a nut is provided at the end of the pull rod. The limit ring and the nut limit the first linear pulling mechanism. One end of the first linear pulling mechanism is rotatably connected to the pull rod. A push ring is provided on the outer edge of the pull rod. When the pull rod is driven to move by the push ring, the reverse drive mechanism is driven synchronously.

[0010] Preferably, the reverse drive mechanism includes a rotating seat, a rocker plate, a fixed frame, a guide post, and a transmission stop plate. The rotating seat is fixedly mounted on the piston plate. The middle part of the rocker plate is rotatably connected to the rotating seat. One end of the guide post is fixedly connected to the piston plate. The fixed frame is slidably connected to the guide post. The fixed frame is fixedly connected to one end of the second linear pulling mechanism. A first sliding post is provided on the side of the fixed frame. The first sliding post is inserted into the lower half of the rocker plate. A first strip-shaped groove is provided on the rocker plate. The first strip-shaped groove cooperates with the sliding of the first sliding post. The transmission stop plate is slidably connected to the guide post. The bottom of the transmission stop plate contacts the push ring. A second sliding post is provided on the top of the transmission stop plate. The second sliding post is inserted into the upper half of the rocker plate. A second strip-shaped groove is provided on the rocker plate. The second strip-shaped groove cooperates with the sliding of the second sliding post. A return spring is sleeved on the guide post. The return spring applies an elastic force away from the rotating seat to the fixed frame.

[0011] Preferably, the first linear pulling mechanism includes a first guide seat, a first square guide post, and a slip ring. The first guide seat is fixedly mounted on the piston plate, the first square guide post is slidably connected to the first guide seat, the first middle arc plate is fixedly mounted on the top of the first square guide post, the bottom of the first square guide post is provided with a fixing rod, the slip ring is mounted on the pull rod and can rotate on the pull rod, the top of the slip ring is provided with a displacement rod, and the displacement rod and the fixing rod are connected by a hinge rod.

[0012] Preferably, the first linear pulling mechanism includes a second guide seat, a second square guide post, and an elastic pushing mechanism. The second guide seat is fixedly mounted on the piston plate, the second square guide post is slidably connected to the second guide seat, and the elastic pushing mechanism is fixedly mounted on the second guide seat. The elastic pushing mechanism applies an elastic force to the second square guide post, and the second square guide post drives the first side arc plate to approach the second guide seat. The first side arc plate is fixedly mounted on the end of the second square guide post.

[0013] Preferably, the rotating mechanism includes a rack, a linear drive mechanism, and multiple toothed rings. The multiple toothed rings are respectively fixedly installed on the outer edge of the extended ring tube on multiple arc groove plates. The rack meshes with the multiple toothed rings, and the linear drive mechanism can drive the rack to move linearly.

[0014] This invention also provides an oil injection method based on a multi-bearing synchronous grease injection device for oilfield pumping units, comprising: Step 1: The rotating mechanism drives the arc-shaped groove plate to rotate, and the arc-shaped groove is covered by the arc-shaped groove plate; Step 2: The oil squeezing mechanism pushes the piston plate out of the extended annular tube of the arc groove plate; Step 3: Block the gap between the piston plate and the arc groove plate, and block the gap between the piston plate and the oil outlet pipe; The movement of the limiting ring simultaneously drives the first and second middle arc plates to move outwards. The first middle arc plate pushes the two first side arc plates to move outward, and the two first side arc plates are pushed to a position coaxial with the piston plate, and the first middle arc plate is engaged between the two first side arc plates; The second middle arc plate pushes the two second side arc plates to move outward, and the two second side arc plates are pushed to a position coaxial with the piston plate, and the second middle arc plate is engaged between the two second side arc plates. Step 4: The piston plate squeezes the grease out of the oil outlet pipe, and the grease is squeezed into the bearing of the pumping unit along the pipe. Step 5: The linear drive mechanism reverses its motion, causing both the top blocking mechanism and the bottom blocking mechanism to reset. Step 6: The oil squeezing mechanism is reset and pulled.

[0015] (III) Beneficial Effects The multi-bearing synchronous grease injection device and its injection method for oilfield pumping units provided by this invention, by opening an arc-shaped groove on the piston plate, avoids the grease on the arc-shaped groove plate from being driven in the opposite direction, reducing contamination. Then, the top blocking mechanism is driven by a linear drive mechanism to move, and the arc-shaped groove is blocked by the top blocking mechanism, thereby ensuring the normal extrusion of grease. At the same time, the bottom blocking mechanism blocks the gap between the piston plate and the oil outlet pipe, preventing grease from being squeezed out along the gap, further improving the grease extrusion accuracy. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a multi-bearing synchronous grease injection device for oilfield pumping units according to an embodiment of the present invention; Figure 2 This is a partial three-dimensional structural diagram of the multi-bearing synchronous grease injection device for oilfield pumping units according to an embodiment of the present invention. Figure 1 ; Figure 3 This is an embodiment of the present invention. Figure 2 A three-dimensional structural breakdown diagram; Figure 4 This is a partial three-dimensional structural diagram of the multi-bearing synchronous grease injection device for oilfield pumping units according to an embodiment of the present invention. Figure 2 ; Figure 5 This is a three-dimensional structural diagram of the top and bottom blocking mechanisms in the open state according to an embodiment of the present invention. Figure 1 ; Figure 6 This is a three-dimensional structural diagram of the top and bottom blocking mechanisms in the open state according to an embodiment of the present invention. Figure 2 ; Figure 7 This is a three-dimensional structural diagram of the top and bottom blocking mechanisms in the open state according to an embodiment of the present invention. Figure 3 ; Figure 8 This is a three-dimensional structural diagram of the top and bottom blocking mechanisms in the retracted state according to an embodiment of the present invention. Figure 1 ; Figure 9 This is a three-dimensional structural diagram of the top and bottom blocking mechanisms in the retracted state according to an embodiment of the present invention. Figure 2 ; Figure 10 This is a three-dimensional structural diagram of the linear drive mechanism according to an embodiment of the present invention; Figure 11 This is an embodiment of the present invention. Figure 7 Enlarged view of a portion at point A; Figure 12 This is a partial three-dimensional structural diagram of the reverse drive mechanism according to an embodiment of the present invention; Figure 13 This is a three-dimensional structural diagram of the first elastic anti-pull mechanism according to an embodiment of the present invention; Figure 14 This is a three-dimensional structural diagram of the first linear pulling mechanism according to an embodiment of the present invention.

[0017] In the diagram: 1. Arc-shaped groove plate; 2. Oil outlet pipe; 3. Oil squeezing mechanism; 3a. Piston plate; 3b. Arc-shaped groove; 4. Rotation mechanism; 4a. Gear ring; 4b. Rack; 5. Grease storage tank; 6. Top shielding mechanism; 6a. First elastic reverse pulling mechanism; 6a1. First guide seat; 6a2. First square guide post; 6a3. Slip ring; 6b. First linear pulling mechanism; 6b1. Second guide seat; 6b2. Second square guide post; 6b3. Elastic pusher Mechanism; 6c, First side arc plate; 6d, First middle arc plate; 7, Linear drive mechanism; 7a, Electric push rod; 7b, Pull rod; 7c, Limiting ring; 7d, Push ring; 8, Bottom blocking mechanism; 8a, Second elastic reverse pull mechanism; 8b, Second linear pull mechanism; 8c, Second side arc plate; 8d, Second middle arc plate; 9, Reverse drive mechanism; 9a, Rotary seat; 9b, Rocker; 9c, Fixed frame; 9d, Guide post; 9e, Transmission stop plate. Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0020] In the description of this invention, it is necessary to understand that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "top", and "bottom" are based on the orientation or positional relationship shown in the accompanying drawings. The purpose is only to facilitate the description of this invention and to simplify the description. It is not intended to indicate or imply that the component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0021] Reference Figures 1 to 5 The multi-bearing synchronous grease injection device for oilfield pumping units shown includes: The system comprises an oil squeezing mechanism 3, a rotating mechanism 4, a grease storage bin 5, a top blocking mechanism 6, an arc-shaped groove plate 1, and an oil outlet pipe 2. The grease storage bin 5 is fixedly installed on the oil outlet pipe 2. The oil outlet pipe 2 has an arc-shaped groove that communicates with the interior of the grease storage bin 5, allowing the grease in the grease storage bin 5 to enter the oil outlet pipe 2 along the arc-shaped groove. The outer wall of the arc-shaped groove plate 1 fits against the inner wall of the oil outlet pipe 2. Extending ring pipes are provided on both sides of the arc-shaped groove plate 1. The rotating mechanism 4 drives the extending ring pipes to rotate, thereby causing the arc-shaped groove plate 1 to rotate. After the arc-shaped groove plate 1 rotates, it covers the arc-shaped groove of the oil outlet pipe, forming a circular tube between the arc-shaped groove plate 1 and the oil outlet pipe 2. The oil squeezing mechanism 3 is equipped with a piston plate 3a. The oil squeezing mechanism 3 pushes the piston plate 3a, causing the piston plate 3a to push the grease in the oil outlet pipe 2 to move. The grease is squeezed into the bearing of the pumping unit along the pipe. The outer edge of the piston plate 3a is provided with an arc groove 3b to avoid the arc groove plate 1. The right side of the piston plate 3a is provided with a top blocking mechanism 6 to block the arc groove 3b. The oil squeezing mechanism 3 is provided with a linear drive mechanism 7 to drive the opening and closing movement of the top blocking mechanism 6. When the arc groove plate 1 rotates to block the arc groove, there will be a gap between the bottom of the piston plate 3a and the bottom of the oil outlet pipe 2. In order to block this gap, the left side of the piston plate 3a is provided with a bottom blocking mechanism 8. In order to enable the linear drive mechanism 7 to move and simultaneously drive the bottom blocking mechanism 8, the piston plate 3a is provided with a reverse drive mechanism 9. The reverse drive mechanism 9 is used to convert the linear power of the linear drive mechanism 7 into the up and down power of the bottom blocking mechanism 8.

[0022] In this device, such as Figure 10 As shown, the linear drive mechanism 7 includes an electric push rod 7a and a pull rod 7b. The electric push rod 7a is fixedly mounted on the oil extrusion mechanism 3. One end of the pull rod 7b is fixedly connected to the output end of the electric push rod 7a. A limit ring 7c is provided on the pull rod 7b, and a nut that meshes with the limit ring 7c is provided at the end of the pull rod 7b. The limit ring 7c and the nut limit the first linear pulling mechanism 6b, so that one end of the first linear pulling mechanism 6b is rotatably connected to the pull rod 7b. A push ring 7d is provided on the outer edge of the pull rod 7b. The push ring 7d is used to drive the reverse drive mechanism 9 to move when the pull rod 7b moves. The controller controls the electric push rod 7a to move, which will cause the electric push rod 7a to pull the pull rod 7b to move. The electric push rod 7a will drive the push ring 7d and the limit ring 7c to move. When the limit ring 7c moves, the electric push rod 7a will pull the top blocking mechanism 6 to move, so that the top blocking mechanism 6 is... Figure 8 The state is transformed Figure 6In this state, the arc groove 3b is blocked to prepare for the subsequent grease pushing. On the other hand, when the push ring 7d moves, it will push the reverse drive mechanism 9 to move, so that the reverse drive mechanism 9 drives the bottom blocking mechanism 8 to move, and the bottom blocking mechanism 8 will block the gap between the piston plate 3a and the oil outlet pipe 2.

[0023] Conversely, when the electric push rod 7a pushes the pull rod 7b to move, the top blocking mechanism 6 and the bottom blocking mechanism 8 will retract to the inside of the piston plate 3a to avoid blocking the groove steps of the arc groove plate 1 when it initially rotates to reset, thus preventing the arc groove plate 1 from rotating to reset.

[0024] In this device, such as Figure 6 and Figure 8 As shown, the top blocking mechanism 6 includes a first linear pulling mechanism 6b, a first middle arc plate 6d, two first elastic counter-pulling mechanisms 6a, and a first side arc plate 6c. The two first elastic counter-pulling mechanisms 6a are fixedly installed on the piston plate 3a, and the two first side arc plates 6c are respectively fixedly installed on the two first elastic counter-pulling mechanisms 6a. The first elastic counter-pulling mechanism 6a is used to tilt and pull the first side arc plate 6c. The first middle arc plate 6d is located between the two first side arc plates 6c. The two sides of the first middle arc plate 6d are in contact with the inner sides of the two first side arc plates 6c. The two sides of the first middle arc plate 6d are vertical planar structures. One end of the first linear pulling mechanism 6b is connected to the linear drive mechanism 7, and the other end is connected to the first middle arc plate 6d, which is used to convert the power of the linear drive mechanism 7 into a pulling force to move the first middle arc plate 6d. When the linear drive mechanism 7 pulls backward, it pushes the first middle arc plate 6d to move, causing the first middle arc plate 6d to push the first side arc plate 6c to move outward through the contact between lines and surfaces. Figure 8 As shown, this causes the two first side arc plates 6c to be pushed to a position coaxial with the piston plate 3a. At this time, the two side planes of the first middle arc plate 6d will contact the inner planes of the two first side arc plates 6c. As the first middle arc plate 6d continues to be pushed, it will then engage between the two first side arc plates 6c, thereby realizing the installation of the top blocking mechanism 6. Figure 6 As shown, conversely, when the linear drive mechanism 7 moves forward, the first middle arc plate 6d will first be pulled out from between the two first side arc plates 6c. After being pulled out, the first elastic anti-pull mechanism 6a will pull the first side arc plate 6c back to its original position, so that the first side arc plate 6c abuts against the first middle arc plate 6d again, in preparation for the next push.

[0025] In this device, such as Figure 7 , Figure 11 and Figure 12As shown, the reverse drive mechanism 9 includes a rotating base 9a, a rocker plate 9b, a fixed frame 9c, a guide post 9d, and a transmission stop plate 9e. The rotating base 9a is fixedly mounted on the piston plate 3a. The middle part of the rocker plate 9b is rotatably connected to the rotating base 9a. One end of the guide post 9d is fixedly connected to the piston plate 3a. The fixed frame 9c is slidably connected to the guide post 9d. The fixed frame 9c is fixedly connected to one end of the second linear pulling mechanism 8b. The side of the fixed frame 9c is provided with a first sliding post for inserting into the lower half of the rocker plate 9b. The rocker plate 9b is provided with a first sliding post for inserting the first sliding post. When the strip-shaped groove is pushed and rotated by the rocker arm 9b, the rocker arm 9b will push the first sliding column to move, which will cause the first sliding column to drive the fixed frame 9c to move. The transmission plate 9e is slidably connected to the guide column 9d. The bottom of the transmission plate 9e is in contact with the push ring 7d. The top of the transmission plate 9e is provided with a second sliding column that is inserted into the upper half of the rocker arm 9b. The rocker arm 9b is provided with a second strip-shaped groove for the second sliding column to slide. The guide column 9d is fitted with a return spring, which is used to apply an elastic force away from the rotating seat 9a to the fixed frame 9c. When the lever 7b moves, the push ring 7d pushes the transmission plate 9e to move, the transmission plate 9e pushes the second slide column to move, causing the second slide column to push the rocker 9b to rotate. The rocker 9b then pushes the first slide column to move, causing the first slide column to drive the fixed frame 9c to move. The fixed frame 9c then drives the second linear pulling mechanism 8b to move, causing the sliding rings on the push ring 7d and the second linear pulling mechanism 8b to move relative to each other. The sliding rings on the bottom blocking mechanism 8 and the top blocking mechanism 6 move relative to each other, thereby causing the top blocking mechanism 6 and the bottom blocking mechanism 8 to move outward or inward simultaneously.

[0026] In this device, such as Figure 7 and Figure 9As shown, the bottom blocking mechanism 8 includes a second linear pulling mechanism 8b, a second middle arc plate 8d, two second elastic counter-pulling mechanisms 8a, and a second side arc plate 8c. The two second elastic counter-pulling mechanisms 8a are fixedly installed on the piston plate 3a, and the two second side arc plates 8c are respectively fixedly installed on the two second elastic counter-pulling mechanisms 8a. The second elastic counter-pulling mechanism 8a is used to horizontally pull the second side arc plate 8c. The second middle arc plate 8d is located between the two second side arc plates 8c. The two sides of the second middle arc plate 8d are in contact with the inner sides of the two second side arc plates 8c. The two sides of the second middle arc plate 8d are vertical planar structures. One end of the second linear pulling mechanism 8b is connected to the reverse drive mechanism 9, and the other end is connected to the second middle arc plate 8d, which is used to convert the power of the reverse drive mechanism 9 into a pulling force to move the second middle arc plate 8d. The movement of the bottom blocking mechanism 8 is the same as that of the top blocking mechanism 6. The difference is that when the second middle arc plate 8d moves, the second middle arc plate 8d pushes the second side arc plate 8c horizontally outward. In this way, the second side arc plate 8c can be inserted into the groove step of the arc groove plate 1 to achieve a perfect fit. If the second side arc plate 8c is set to tilt, in order to avoid the obstruction of the groove step, the end of the second side arc plate 8c needs to leave a clearance gap, so that when the grease is squeezed out, the grease will be discharged along the gap, affecting the accuracy of the grease pushing.

[0027] In this device, such as Figure 13 As shown, the first linear pulling mechanism 6b includes a first guide seat 6a1, a first square guide post 6a2, and a slip ring 6a3. The first guide seat 6a1 is fixedly mounted on the piston plate 3a. The first square guide post 6a2 is slidably connected to the first guide seat 6a1. The first central arc plate 6d is fixedly mounted on the top of the first square guide post 6a2. A fixing rod is provided at the bottom of the first square guide post 6a2. The slip ring 6a3 is rotatably mounted on the pull rod 7b. A displacement rod is provided at the top of the slip ring 6a3. The displacement rod and the fixing rod are connected by a hinge rod. It is conceivable that the slip ring 6a3 can also be fixedly mounted on the pull rod 7b, while the slip ring on the second elastic counter-pulling mechanism 8a can only be slidably mounted on the pull rod 7b in order to move in the opposite direction to the movement of the pull rod 7b. When the slip ring 6a3 moves, the slip ring 6a3 will push the first square guide post 6a2 to move through the displacement rod, the fixing rod, and the hinge rod, thereby causing the first square guide post 6a2 to push the first central arc plate 6d to move.

[0028] In this device, such as Figure 14As shown, the first linear pulling mechanism 6b includes a second guide seat 6b1, a second square guide post 6b2, and an elastic pushing mechanism 6b3. The second guide seat 6b1 is fixedly mounted on the piston plate 3a, and the second square guide post 6b2 is slidably connected to the second guide seat 6b1. The elastic pushing mechanism 6b3 is fixedly mounted on the second guide seat 6b1. The elastic pushing mechanism 6b3 is used to apply an elastic force to the second square guide post 6b2 to drive the first side arc plate 6c closer to the second guide seat 6b1. The first side arc plate 6c is fixedly mounted on the end of the second square guide post 6b2. The elastic pushing mechanism 6b3 includes a connecting plate mounted on the second square guide post 6b2, a guide slide mounted on the second guide seat 6b1, a guide post mounted on the connecting plate, and an abutment spring sleeved on the outer edge of the elastic pushing mechanism 6b3. The elastic pushing mechanism 6b3 applies an elastic force to the second square guide post 6b2. When the first middle arc plate 6d is pulled out from between the two first side arc plates 6c, the elastic pushing mechanism 6b3 causes the second square guide post 6b2 to slide within the second guide seat 6b1, so that the first side arc plates 6c retract to the inner side of the piston plate 3a.

[0029] In this device, such as Figure 1 As shown, the rotating mechanism 4 includes a rack 4b, a linear drive mechanism, and multiple gear rings 4a. The gear rings 4a are respectively fixedly mounted on the outer edges of extended ring tubes on multiple arc-shaped groove plates 1. The rack 4b meshes with all the gear rings 4a. The linear drive mechanism is used to linearly drive the rack 4b to move. The linear drive mechanism can be an electric push rod or a cylinder. The rack 4b is driven by the linear drive mechanism, which causes the rack 4b push rod to mesh and drive the multiple gear rings 4a to rotate. This, in turn, causes the gear rings 4a to drive the arc-shaped groove plates 1 to rotate via the extended ring tubes.

[0030] The multi-bearing synchronous grease injection device for oilfield pumping units provided by the present invention avoids the grease on the arc groove plate being driven in the opposite direction when the piston plate moves in the reverse direction by opening an arc groove on the piston plate, thus reducing contamination. Then, the top blocking mechanism is driven by a linear drive mechanism to move, so that the top blocking mechanism blocks the arc groove when moving in the forward direction, ensuring the normal extrusion of grease. Furthermore, by setting a bottom blocking mechanism, the gap between the piston plate and the oil outlet pipe is blocked, thereby preventing grease from being squeezed out along the gap and preventing more grease from being scraped away when the piston plate moves in the opposite direction. This improves the accuracy when squeezing out grease. Furthermore, to ensure that the arc-shaped groove plate can rotate within the oil outlet pipe, the bottom blocking mechanism is designed with a retractable structure, allowing it to retract to the inside of the piston plate to avoid obstructing the arc-shaped groove plate. A reverse drive mechanism is also incorporated to transfer the power of the linear drive mechanism to drive the bottom blocking mechanism, ensuring that the bottom blocking mechanism opens and closes simultaneously with the top blocking mechanism. This saves on the drive source, reduces equipment costs, and allows for simultaneous movement, avoiding complex equipment control. This ensures the movement of the bottom blocking mechanism even in confined spaces. Additionally, the movement of the second side arc plate is designed to be horizontal, allowing for a perfect fit with the groove steps of the arc-shaped groove plate, preventing any gaps. Furthermore, both the first and second middle arc plates utilize line and surface contact during movement. This causes the first middle arc plate to push the first side arc plate outward, creating an arc plate structure in the top blocking mechanism, which then blocks the arc groove. The second middle arc plate also uses this method to push the second side arc plate. This eliminates the need for creating a strip hole in the piston plate and then using a pulling mechanism to drive the first side arc plate. Instead, the first middle arc plate directly pushes the first side arc plate, reducing costs. It also ensures that the first side arc plate is first aligned with the piston plate on the same axis before the first middle arc plate snaps into place. Additionally, during reset, the first middle arc plate is first pulled out before the first side arc plate resets. This eliminates the need for a drive source and controller, saving on a complex control system and further reducing costs.

[0031] This embodiment also discloses the oil injection method of the above-mentioned multi-bearing synchronous grease injection device for oilfield pumping units, as detailed below: Step 1: The rotating mechanism drives the arc-shaped groove plate to rotate, and the arc-shaped groove is covered by the arc-shaped groove plate; Step 2: The oil squeezing mechanism pushes the piston plate out of the extended annular tube of the arc groove plate; Step 3: Block the gap between the piston plate and the arc groove plate, and block the gap between the piston plate and the oil outlet pipe; The movement of the limiting ring simultaneously drives the first and second middle arc plates to move outwards. The first middle arc plate pushes the two first side arc plates to move outward, and the two first side arc plates are pushed to a position coaxial with the piston plate, and the first middle arc plate is engaged between the two first side arc plates; The second middle arc plate pushes the two second side arc plates to move outward, and the two second side arc plates are pushed to a position coaxial with the piston plate, and the second middle arc plate is engaged between the two second side arc plates. Step 4: The piston plate squeezes the grease out of the oil outlet pipe, and the grease is squeezed into the bearing of the pumping unit along the pipe. Step 5: The linear drive mechanism reverses its motion, causing both the top blocking mechanism and the bottom blocking mechanism to reset. Step 6: The oil squeezing mechanism is reset and pulled.

[0032] In this embodiment, the linear drive mechanism is controlled by the controller to work, so that the rack 4b is driven by the linear drive mechanism, which will cause the rack 4b to rotate through meshing, thereby causing the rack 4b to rotate through the meshing of multiple toothed rings 4a. In turn, the toothed rings 4a drive the arc groove plate 1 to rotate through the extended ring tube. After the arc groove plate 1 rotates, the arc groove plate 1 will cover the arc groove, so that a circular tube assembly is formed between the arc groove plate 1 and the oil outlet pipe 2. In practical applications, the controller controls the oil squeezing mechanism 3 to push the piston plate 3a out of the extended ring tube of the arc groove plate 1, providing space for the opening of the bottom blocking mechanism 8. Then, the controller controls the output end of the electric push rod 7a to pull back, which will cause the electric push rod 7a to pull the pull rod 7b to move. The electric push rod 7a will drive the push ring 7d and the limit ring 7c to move. In this embodiment, when the limiting ring 7c moves, the electric push rod 7a will pull the first middle arc plate 6d through the first linear pulling mechanism 6b, causing the first middle arc plate 6d to move outward through the contact between the line and the surface, such as... Figure 8 As shown, this causes the two first side arc plates 6c to be pushed to a position coaxial with the piston plate 3a. At this time, the two side planes of the first middle arc plate 6d will contact the inner planes of the two first side arc plates 6c. As the first middle arc plate 6d continues to be pushed, it will then engage between the two first side arc plates 6c, thereby realizing the installation of the top blocking mechanism 6. Figure 8 The state is transformed Figure 6 The state of the arc-shaped groove 3b is then blocked to prepare for the subsequent grease application. On the other hand, in practical applications, when the push ring 7d moves, it will also push the transmission plate 9e to move, which in turn will push the second slide column to move, causing the second slide column to push the rocker 9b to rotate. The rocker 9b will then push the first slide column to move, which will cause the first slide column to drive the fixed frame 9c to move. The fixed frame 9c will then drive the second linear pulling mechanism 8b to move, causing the slide rings on the push ring 7d and the second linear pulling mechanism 8b to move relative to each other. The slide rings on the bottom blocking mechanism 8 and the top blocking mechanism 6 will move relative to each other, causing the top blocking mechanism 6 and the bottom blocking mechanism 8 to move inward simultaneously. During the movement of the bottom blocking mechanism 8, the second side arc plate 8c will be able to engage with the groove step of the arc groove plate 1, achieving a perfect fit. The bottom blocking mechanism 8 will then block the gap between the piston plate 3a and the oil outlet pipe 2. In this embodiment, the oil squeezing mechanism 3 is controlled by the controller to work, so that the oil squeezing mechanism 3 pushes the piston plate 3a to move, so that the piston plate 3a squeezes out the grease in the oil outlet pipe 2, so that the grease is squeezed into the bearing of the oil pumping machine along the pipe. In practical applications, after the grease is extruded, the controller controls the linear drive mechanism 7 to move in the opposite direction, so that the top blocking mechanism 6 and the bottom blocking mechanism 8 are reset. This causes the first side arc plate 6c, the first middle arc plate 6d, the second middle arc plate 8d, and the second side arc plate 8c to be retracted to the inside of the piston plate 3a. This ensures that when the piston plate 3a is reset, it will not contact the inner wall of the arc groove plate 1 and the oil outlet pipe 2, thereby preventing the reverse movement of the grease layer remaining on the wall surface.

[0033] The multi-bearing synchronous grease injection device and its injection method for oilfield pumping units provided by this invention, by opening an arc-shaped groove on the piston plate, avoids the grease on the arc-shaped groove plate from being driven in the opposite direction, reducing contamination. Then, the top blocking mechanism is driven by a linear drive mechanism to move, and the arc-shaped groove is blocked by the top blocking mechanism, thereby ensuring the normal extrusion of grease. At the same time, the bottom blocking mechanism blocks the gap between the piston plate and the oil outlet pipe, preventing grease from being squeezed out along the gap, further improving the grease extrusion accuracy.

[0034] The above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the patent protection scope of the present invention should be defined by the claims.

Claims

1. A multi-bearing synchronous grease injection device for oilfield pumping units, characterized in that, include: The oil squeezing mechanism (3), rotating mechanism (4), oil storage tank (5), top shielding mechanism (6), arc groove plate (1), and oil outlet pipe (2) are provided. The oil storage tank (5) is fixedly installed on the oil outlet pipe (2). The oil outlet pipe (2) is provided with an arc groove. The arc groove connects to the oil storage tank (5). The oil in the oil storage tank (5) enters the oil outlet pipe (2) through the arc groove. The outer wall of the arc groove plate (1) is in contact with the inner wall of the oil outlet pipe (2). The two sides of the oil outlet pipe (2) are provided with extended ring pipes. The extended ring pipes are driven to rotate by the rotating mechanism (4). The arc groove plate (1) rotates synchronously. The arc groove plate (1) covers the arc groove of the oil outlet pipe by rotation. The arc groove plate (1) and the oil outlet pipe (2) form a circular tube. The oil squeezing mechanism (3) is provided with a piston plate (3a). The oil squeezing mechanism (3) pushes the piston plate (3a) to push the grease in the oil outlet pipe (2) to move. The grease can be squeezed into the bearing of the oil pump along the pipe. The piston plate (3a) has an arc groove (3b) on its outer edge. The piston plate (3a) avoids the arc groove plate (1) through the arc groove (3b). The piston plate (3a) has a top blocking mechanism (6) on its right side. The top blocking mechanism (6) can block the arc groove (3b). The oil squeezing mechanism (3) has a linear drive mechanism (7). The linear drive mechanism (7) drives the top blocking mechanism (6) to open and close. The arc groove plate blocks the arc groove (3b) by rotating (1). There is a gap between the bottom of the piston plate (3a) and the bottom of the oil outlet pipe (2). The piston plate (3a) has a bottom blocking mechanism (8) on its left side. The bottom blocking mechanism (8) blocks the gap. The piston plate (3a) has a reverse drive mechanism (9). The reverse drive mechanism (9) converts the linear power of the linear drive mechanism (7) into the up and down power of the bottom blocking mechanism (8). The linear drive mechanism (7) drives the bottom blocking mechanism (8) synchronously.

2. The multi-bearing synchronous grease injection device for oilfield pumping units according to claim 1, characterized in that, The top blocking mechanism (6) includes a first linear pulling mechanism (6b), a first central arc plate (6d), a first elastic counter-pulling mechanism (6a), and a first side arc plate (6c). Two of each of the first elastic counter-pulling mechanism (6a) and the first side arc plate (6c) are provided. The two first elastic counter-pulling mechanisms (6a) are fixedly mounted on the piston plate (3a), and the two first side arc plates (6c) are respectively fixedly mounted on the two first elastic counter-pulling mechanisms (6a). The first elastic counter-pulling mechanism (6a) can tilt and pull the first side arc plate... A plate (6c) is installed between two first side arc plates (6c). A first middle arc plate (6d) is installed between the two first side arc plates (6c). The two sides of the first middle arc plate (6d) are in contact with the inner sides of the two first side arc plates (6c). The two sides of the first middle arc plate (6d) are vertical planar structures. One end of the first linear pulling mechanism (6b) is connected to the linear drive mechanism (7), and the other end is connected to the first middle arc plate (6d). The first linear pulling mechanism (6b) can convert the power of the linear drive mechanism (7) into a pulling force to move the first middle arc plate (6d).

3. The multi-bearing synchronous grease injection device for oilfield pumping units according to claim 2, characterized in that, The bottom blocking mechanism (8) includes a second linear pulling mechanism (8b), a second central arc plate (8d), a second elastic counter-pulling mechanism (8a), and a second side arc plate (8c). Two of each of the second elastic counter-pulling mechanism (8a) and the second side arc plate (8c) are provided. The two second elastic counter-pulling mechanisms (8a) are fixedly mounted on the piston plate (3a), and the two second side arc plates (8c) are respectively fixedly mounted on the two second elastic counter-pulling mechanisms (8a). The second elastic counter-pulling mechanism (8a) can horizontally pull the second side arc plate... A plate (8c) is installed between two second side arc plates (8c). A second middle arc plate (8d) is installed between the two second side arc plates (8c). The two sides of the second middle arc plate (8d) are in contact with the inner sides of the two second side arc plates (8c). The two sides of the second middle arc plate (8d) are vertical planar structures. One end of the second linear pulling mechanism (8b) is connected to the reverse driving mechanism (9), and the other end is connected to the second middle arc plate (8d). The second linear pulling mechanism (8b) can convert the power of the reverse driving mechanism (9) into a pulling force to move the second middle arc plate (8d).

4. The multi-bearing synchronous grease injection device for oilfield pumping units according to claim 3, characterized in that, The linear drive mechanism (7) includes an electric push rod (7a) and a pull rod (7b). The electric push rod (7a) is fixedly installed on the oil squeezing mechanism (3). One end of the pull rod (7b) is fixedly connected to the output end of the electric push rod (7a). A limit ring (7c) is provided on the pull rod (7b). A nut is provided at the end of the pull rod (7b). The first linear pulling mechanism (6b) is limited by the limit ring (7c) and the nut. One end of the first linear pulling mechanism (6b) is rotatably connected to the pull rod (7b). A push ring (7d) is provided on the outer edge of the pull rod (7b). When the pull rod (7b) is driven to move by the push ring (7d), the reverse drive mechanism (9) is driven synchronously.

5. The multi-bearing synchronous grease injection device for oilfield pumping units according to claim 4, characterized in that, The reverse drive mechanism (9) includes a rotating seat (9a), a rocker plate (9b), a fixed frame (9c), a guide post (9d), and a transmission stop plate (9e). The rotating seat (9a) is fixedly mounted on the piston plate (3a). The middle part of the rocker plate (9b) is rotatably connected to the rotating seat (9a). One end of the guide post (9d) is fixedly connected to the piston plate (3a). The fixed frame (9c) is slidably connected to the guide post (9d). The fixed frame (9c) is fixedly connected to one end of the second linear pulling mechanism (8b). A first sliding post is provided on the side of the fixed frame (9c). The first sliding post is inserted into the rocker plate (9a). (b) In the lower half, the rocker (9b) is provided with a first strip groove, which cooperates with the sliding of the first sliding column. The transmission plate (9e) is slidably connected with the guide column (9d). The bottom of the transmission plate (9e) is in contact with the push ring (7d). The top of the transmission plate (9e) is provided with a second sliding column, which is inserted into the upper half of the rocker (9b). The rocker (9b) is provided with a second strip groove, which cooperates with the sliding of the second sliding column. A return spring is sleeved on the guide column (9d). The return spring applies an elastic force away from the rotating seat (9a) to the fixing frame (9c).

6. The multi-bearing synchronous grease injection device for oilfield pumping units according to claim 2, characterized in that, The first linear pulling mechanism (6b) includes a first guide seat (6a1), a first square guide post (6a2), and a slip ring (6a3). The first guide seat (6a1) is fixedly installed on the piston plate (3a). The first square guide post (6a2) is slidably connected to the first guide seat (6a1). The first middle arc plate (6d) is fixedly installed on the top of the first square guide post (6a2). The bottom of the first square guide post (6a2) is provided with a fixing rod. The slip ring (6a3) is installed on the pull rod (7b). The slip ring (6a3) can rotate on the pull rod (7b). The top of the slip ring (6a3) is provided with a displacement rod. The displacement rod and the fixing rod are connected by a hinge rod.

7. The multi-bearing synchronous grease injection device for oilfield pumping units according to claim 2, characterized in that, The first linear pulling mechanism (6b) includes a second guide seat (6b1), a second square guide post (6b2), and an elastic pushing mechanism (6b3). The second guide seat (6b1) is fixedly mounted on the piston plate (3a). The second square guide post (6b2) is slidably connected to the second guide seat (6b1). The elastic pushing mechanism (6b3) is fixedly mounted on the second guide seat (6b1). The elastic pushing mechanism (6b3) applies an elastic force to the second square guide post (6b2). The second square guide post (6b2) drives the first side arc plate (6c) to approach the second guide seat (6b1). The first side arc plate (6c) is fixedly mounted on the end of the second square guide post (6b2).

8. The multi-bearing synchronous grease injection device for oilfield pumping units according to claim 1, characterized in that, The rotating mechanism (4) includes a rack (4b), a linear drive mechanism, and multiple toothed rings (4a). The multiple toothed rings (4a) are respectively fixedly installed on the outer edge of the extended ring tube on multiple arc groove plates (1). The rack (4b) meshes with the multiple toothed rings (4a). The linear drive mechanism can drive the rack (4b) to move linearly.

9. An oil injection method based on the multi-bearing synchronous grease injection device for oilfield pumping units according to any one of claims 1 to 8, characterized in that, include: Step 1: The rotating mechanism drives the arc-shaped groove plate to rotate, and the arc-shaped groove is covered by the arc-shaped groove plate; Step 2: The oil squeezing mechanism pushes the piston plate out of the extended annular tube of the arc groove plate; Step 3: Block the gap between the piston plate and the arc groove plate, and block the gap between the piston plate and the oil outlet pipe; The movement of the limiting ring simultaneously drives the first and second middle arc plates to move outwards. The first middle arc plate pushes the two first side arc plates to move outward, and the two first side arc plates are pushed to a position coaxial with the piston plate, and the first middle arc plate is engaged between the two first side arc plates; The second middle arc plate pushes the two second side arc plates to move outward, and the two second side arc plates are pushed to a position coaxial with the piston plate, and the second middle arc plate is engaged between the two second side arc plates. Step 4: The piston plate squeezes the grease out of the oil outlet pipe, and the grease is squeezed into the bearing of the pumping unit along the pipe. Step 5: The linear drive mechanism reverses its motion, causing both the top blocking mechanism and the bottom blocking mechanism to reset. Step 6: The oil squeezing mechanism is reset and pulled.

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