Packer pushing device for coal mine

Abstract

The invention provides a packer pushing device for a coal mine, and belongs to the technical field of packer feeding tools. Comprising a mounting frame, an assembling cabin is assembled on the mounting frame, a fixed frame is fixedly connected to the outer portion of the assembling cabin, a driving motor and an electric telescopic rod are arranged in the assembling cabin in a sleeved mode, a first movable frame is connected to the bottom of the top end of the assembling cabin through a guide pipe, and conveying rollers are arranged in the fixed frame and the first movable frame in a sleeved mode; and electric telescopic rods are symmetrically mounted in the assembling cabin. By arranging an electric telescopic rod, a limiting assembly, a guide pipe and a first spring, the relative position between a fixed frame and a first movable frame in the whole device can be adaptively adjusted along with the size of an oil pipe, the adaptation range of the device is widened, and after adjustment, the oil pipe can be adjusted through the limiting assembly; and enough clamping force is provided for the oil pipe in the pushing process, so that the pushing effect of the whole device on the packer is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of packer running tools, and particularly to a packer pushing device for coal mines. Background Art

[0002] In coal mine underground operations, a packer is a key device for plugging oil pipes or wellbores. It is usually directly assembled on the oil pipe, and a pushing device is needed to send the oil pipe and the packer to the target position to ensure the smooth progress of wellbore sealing or sectional operations. Currently, a roller-type conveying device is generally used in the industry as the pushing mechanism of the packer. Its basic working principle is to drive one or more pairs of rollers to rotate by a motor, clamp the oil pipe by using the friction between the rollers and the oil pipe, and push the oil pipe and the packer to move along the wellbore under the rotation of the rollers.

[0003] However, this traditional roller-type conveying device has many technical defects in the actual application process, which affect the pushing efficiency and operation safety of the packer. First of all, the existing roller-type pushing device usually uses roller pairs with fixed spacing, and its clamping range is limited. When encountering oil pipes with different diameters, it is necessary to manually adjust the roller spacing or replace the roller assembly, which is not only cumbersome to operate but also seriously affects the operation efficiency. Secondly, during the pushing process of the packer, when the motor starts or stops, the rollers and the oil pipe are prone to instantaneous slipping due to inertia or load changes. Especially in deep wells or large-inclination wellbores, the self-weight of the oil pipe is large. If the clamping force of the rollers cannot be applied quickly and stably, it is extremely easy to cause the positioning deviation of the packer, affecting the plugging effect, and even possibly leading to underground accidents in severe cases. Therefore, the present application provides a packer pushing device for coal mines to meet the requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a packer pushing device for coal mines to solve the problems of small adaptation range of the existing pushing device and poor positioning effect after the packer is pushed in place.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A packer pushing device for coal mines, comprising a mounting frame, an assembly cabin is assembled on the mounting frame, a fixed frame is fixedly connected to the outside of the assembly cabin, and a driving motor and an electric telescopic rod are sleeved inside the assembly cabin. The top and bottom of the assembly cabin are connected to a first movable frame through a guide pipe. Conveyor rollers are sleeved in both the fixed frame and the first movable frame. Electric telescopic rods are symmetrically installed in the assembly cabin. The end of the driving shaft of the electric telescopic rod is fixedly connected to a second movable frame. A clamping block is fixedly connected to the outside of the second movable frame, and a sliding seat is sleeved in the second movable frame. A fixing port adapted to the shape of the clamping block is formed on the first movable frame; a limiting component for pressing and limiting the first movable frame when pushing the oil pipe and the packer, and the limiting component is connected to the sliding seat; an adjusting component for adjusting the relative position between the limiting component and the second movable frame, and the adjusting component is connected to the second movable frame; a locking component for locking the conveyor rollers in the first movable frame, and the locking component is connected to the sliding seat.

[0006] Optionally, the guide pipe is composed of an outer pipe and an inner pipe. The bottom end of the inner pipe is fixedly connected to the top of the first movable frame, the top end of the outer pipe is fixedly connected to the top of the assembly cabin, and a first spring surrounding the outside of the guide pipe is fixedly connected between the assembly cabin and the top of the first movable frame. The first movable frame is directly above the fixed frame.

[0007] Optionally, both the fixed frame and the first movable frame are movably connected to the conveyor roller through bearings. There are four conveyor rollers in the fixed frame. Both ends of the two conveyor rollers on both sides are movably connected to the fixed frame through bearings. One end of the two conveyor rollers in the middle is associated with the driving shaft of the driving motor.

[0008] Optionally, the driving motor is connected to the conveyor roller through a reducer. The positions of the conveyor rollers in the first movable frame correspond to the positions of the two conveyor rollers in the middle of the fixed frame. A brake is provided in the driving motor.

[0009] Optionally, the limiting component includes a pressing plate fixedly connected to the outside of the sliding seat. The end of the pressing plate extends to the outside of the second movable frame, and the pressing plate is inclined downward. A weakening groove is formed in the middle of the pressing plate.

[0010] Optionally, the adjusting component includes a servo motor fixedly connected to the bottom end of the second movable frame. A screw rod is movably connected to the second movable frame through a bearing. The screw rod is threadedly connected to the sliding seat, and the bottom end of the screw rod is fixedly connected to the driving shaft of the servo motor.

[0011] Optionally, a pressure sensor is sleeved in the middle of the end of the pressing plate. The pressing plate is electrically connected to the servo motor through a circuit. Through openings adapted to the size of the circuit are provided on the pressing plate and the weakening groove.

[0012] Optionally, an insertion opening is provided in the middle of the top end of the first movable frame. The width value of the insertion opening is adapted to the width value of the pressing plate. The fixing opening is provided on the side of the first movable frame close to the second movable frame. One end of the conveying roller in the first movable frame close to the second movable frame extends to the outside of the first movable frame and is fixedly connected with a locking head.

[0013] Optionally, the locking assembly includes side plates symmetrically installed on both sides of the sliding seat. The ends of the side plates extend to the outside of the second movable frame and are fixedly connected with locking seats. A locking sleeve is rotatably sleeved in the locking seats. A guiding surface is provided on the outside of the locking head, and a notch adapted to the shape of the guiding surface is provided in the locking sleeve.

[0014] Optionally, a limiting edge sleeved in the locking seat is fixedly connected to the locking sleeve. A second spring and a plugging strip are fixedly connected to the outside of the limiting edge. The end of the second spring is fixedly connected with an annular plate. An activity cavity adapted to the shapes of the limiting edge and the annular plate is provided in the locking seat. The locking seat is provided with a docking seat adapted to the size of the annular plate. Docking grooves adapted to the shape of the plugging strip and evenly distributed are provided on the docking seat.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, by providing the electric telescopic rod, the limiting component, the guiding tube and the first spring, the relative position between the fixed frame and the first movable frame in the whole device can be adaptively adjusted according to the size of the oil pipe, improving the adaptation range of the device. After the adjustment, through the limiting component, sufficient clamping force is provided for the oil pipe during the pushing process to ensure the pushing effect of the whole device on the packer.

[0016] By providing the limiting component, the adjusting component and the pressure sensor, after the relative position of the fixed frame and the first movable frame of the device is adjusted according to the size of the oil pipe, the position of the limiting component can also be correspondingly adjusted by relying on the adjusting component. During the adjustment process, it is monitored in real time by the pressure sensor, which can not only keep the force of clamping the oil pipe to meet the pushing requirements, but also avoid damaging the oil pipe. At the same time, during the pushing process, abnormalities can be found in time according to the change of pressure, making the pushing process of the device stable and reliable.

[0017] By setting the electric telescopic rod, the limit component, the second movable frame and the clamping block, the device can drive the second movable frame to displace in the assembly cabin by relying on the electric telescopic rod. According to the different elongation lengths of the electric telescopic rod, corresponding to different working states of the device. During the pushing process, the electric telescopic rod only pushes the limit component to contact the first movable frame, meeting the clamping and limiting requirements during the pushing process. After the packer reaches the working position, it then pushes the second movable frame to position the first movable frame, thereby ensuring the positioning and fixing effect of the device on the oil pipe and the packer and avoiding the positioning deviation of the packer.

[0018] By setting the locking component on the sliding seat, when the electric telescopic rod drives the second movable frame to position and fix the first movable frame, the locking component on the sliding seat also synchronously locks the conveying roller in the first movable frame following the displacement of the sliding seat. After the first movable frame is fixed, the conveying roller inside it cannot rotate either, changing the rolling friction between the oil pipe and the conveying roller during the pushing process into sliding friction, ensuring the limiting effect on the positions of the oil pipe and the packer in the positioning state. At the same time, it also enables the synergistic effect generated among the overall structures of the device. Relying on the elongation length of the electric telescopic rod, it drives different structures to produce effects in the corresponding working states, making the technical solution of the entire device more complete.

[0019] By setting the second spring, the insertion bar and the docking groove, the locking sleeve can rotate during the process of docking with the locking head, thus adapting to the locking head rotated to different states, enabling the locking sleeve to make corresponding rotational adjustments. After the second movable frame positions and fixes the first movable frame, through the docking of the insertion bar and the docking groove, the locking of the locking sleeve, the locking head and the conveying roller is achieved simultaneously. The cooperation between the structures is ingenious, which can effectively solve the problem of the unfixed rotation angles of the conveying roller and the locking head, further improving the technical solution of the entire device. Brief Description of the Drawings

[0020] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0021] Figure 1 It is a first - perspective three - dimensional structural schematic diagram of a packer pushing device for coal mines; Figure 2 It is a second - perspective three - dimensional structural schematic diagram of a packer pushing device for coal mines; Figure 3 It is a three - dimensional structural schematic diagram of the assembly cabin; Figure 4 It is a schematic diagram of the cooperation structure of the first movable frame, the electric telescopic rod and the second movable frame; Figure 5 For Figure 4Schematic diagram of the enlarged structure at position A in [the figure]; Figure 6 Schematic diagram of the three-dimensional structure of the first movable frame; Figure 7 It is Figure 6 Schematic diagram of the enlarged structure at position B in [the figure]; Figure 8 Schematic diagram of the three-dimensional structure of the second movable frame; Figure 9 Schematic diagram of the three-dimensional structure of the sliding seat; Figure 10 Schematic diagram of the mating structure of the locking sleeve, the second spring and the annular plate; Figure 11 Schematic diagram of the sectional view of the locking seat.

[0022] Reference numerals: 1. Mounting frame; 2. Assembly cabin; 3. Fixed frame; 4. First movable frame; 5. Guide tube; 6. Driving motor; 7. Reducer; 8. Conveyor roller; 9. Activity cavity; 10. First spring; 11. Electric telescopic rod; 12. Second movable frame; 13. Servo motor; 14. Screw rod; 15. Sliding seat; 16. Block; 17. Pressure plate; 18. Weakening groove; 19. Pressure sensor; 20. Insertion port; 21. Fixed port; 22. Locking head; 23. Guide surface; 24. Side plate; 25. Locking seat; 26. Locking sleeve; 27. Limiting edge; 28. Second spring; 29. Annular plate; 30. Insertion strip; 31. Docking seat; 32. Docking groove.

[0023] As shown in the figure, in order to clearly show the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for schematic purposes and is not intended to limit the present invention to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0024] The following describes in detail a coal mine packer pushing device provided by the present invention with reference to the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0025] It should be noted that in the specification, references to "one embodiment", "an embodiment", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Additionally, when describing a particular feature, structure, or characteristic in connection with an embodiment, implementing such feature, structure, or characteristic in connection with other embodiments (whether or not explicitly described) should be within the knowledge of those skilled in the relevant art.

[0026] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood to not necessarily be intended to convey a set of exclusive factors, but rather, depending at least in part on the context, can alternatively allow for the existence of other factors that are not necessarily explicitly described.

[0027] It can be understood that the meanings of "on", "above", and "over" in the present invention should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only mean "above" or "over" something, but can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0028] Furthermore, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the figures. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the figures. The device may be otherwise oriented, and the spatial relative descriptors used herein may be interpreted accordingly.

[0029] As Figures 1 to 11As shown in the figure, an embodiment of the present invention provides a packer pushing device for coal mines, which includes a mounting frame 1. An assembly cabin 2 is assembled on the mounting frame 1. A fixing frame 3 is fixedly connected to the outside of the assembly cabin 2. A driving motor 6 and an electric telescopic rod 11 are sleeved inside the assembly cabin 2. The mounting frame 1 provides an installation and fixing space for the assembly cabin 2 and the structures associated with the assembly cabin 2. An adjustment structure capable of adjusting the position of the assembly cabin 2 is also provided in the mounting frame 1, which is used to change the overall position of the assembly cabin 2 in the mounting frame 1 to adapt to the working requirements under different environments. The above-mentioned mounting frame 1 and the adjustment structure are both prior arts, and their principles and usage processes are the same as those of the prior art, so they will not be elaborated here.

[0030] A first movable frame 4 is connected to the top and bottom of the assembly cabin 2 through a guide pipe 5. Conveyor rollers 8 are sleeved in both the fixing frame 3 and the first movable frame 4. The position of the conveyor roller 8 in the fixing frame 3 is fixed following the fixing of the fixing frame 3, while the first movable frame 4 can be adjusted adaptively according to the size of the oil pipe, changing the distance between the conveyor roller 8 in the fixing frame 3 and the conveyor roller 8 in the first movable frame 4. Then, the whole device can achieve a good clamping and pushing effect on oil pipes of different sizes, ensuring the overall adaptation range of the device. Electric telescopic rods 11 are symmetrically installed in the assembly cabin 2. The end of the driving shaft of the electric telescopic rod 11 is fixedly connected to a second movable frame 12. A clamping block 16 is fixedly connected to the outside of the second movable frame 12. A sliding seat 15 is sleeved in the second movable frame 12. A fixing port 21 adapted to the shape of the clamping block 16 is opened on the first movable frame 4. The electric telescopic rod 11 can drive the second movable frame 12 to telescopically move inside the assembly cabin 2 as a whole, and then drive the phase position between the second movable frame 12 and the first movable frame 4 to change. According to different working requirements, the position of the second movable frame 12 is changed, making the whole device present different working states and meeting the requirements of different stages during the packer pushing process. When the packer is pushed to the working position, the whole device needs to position and fix the oil pipe. At this time, the clamping block 16 on the second movable frame 12 can be driven by the electric telescopic rod 11 to be embedded in the fixing port 21 on the first movable frame 4, thereby further fixing the position of the first movable frame 4 and ensuring the clamping force on the oil pipe between the first movable frame 4 and the fixing frame 3, preventing the positioning deviation of the packer. The limiting component is used to press and limit the first movable frame 4 when pushing the oil pipe and the packer. The limiting component is connected to the sliding seat 15. The setting of the limiting component corresponds to the pushing stage of the overall device, and can press and limit the entire first movable frame 4 to ensure the clamping and conveying effect of the conveying rollers 8 in the fixed frame 3 and the first movable frame 4 on the oil pipe; the adjusting component is used to adjust the relative position between the limiting component and the second movable frame 12. The adjusting component is connected to the second movable frame 12. The setting of the adjusting component can correspondingly adjust the position of the limiting component while the distance between the fixed frame 3 and the first movable frame 4 changes following the size of the oil pipe, maintain the pressure of the limiting component, enable the device to have a good clamping and conveying effect on oil pipes of different sizes, and then ensure the pushing effect of the packer; the locking component is used to lock the conveying rollers 8 in the first movable frame 4. The locking component is connected to the sliding seat 15. The setting of the locking component can, after the packer is pushed to the working position, start working by the further pushing of the electric telescopic rod 11. Then, while cooperating with the second movable frame 12 and the clamping block 16 to fix the position of the first movable frame 4, the conveying rollers 8 in the first movable frame 4 are also locked synchronously, further ensuring the positioning and fixing effect of the overall device on the oil pipe and the packer.

[0031] In this embodiment, as Figures 1 to 4 shown, the guiding pipe 5 is composed of an outer pipe and an inner pipe. The bottom end of the inner pipe is fixedly connected to the top of the first movable frame 4, the top end of the outer pipe is fixedly connected to the top end of the assembly cabin 2, and a first spring 10 surrounding the outside of the guiding pipe 5 is fixedly connected between the assembly cabin 2 and the top of the first movable frame 4. The first movable frame 4 is located directly above the fixed frame 3. Both the fixed frame 3 and the first movable frame 4 are movably connected to the conveying rollers 8 through bearings. There are a total of four conveying rollers 8 in the fixed frame 3. Both ends of the two conveying rollers 8 on both sides are movably connected to the fixed frame 3 through bearings. One end of the two conveying rollers 8 in the middle is associated with the driving shaft of the driving motor 6. The structural design of the inner pipe and the outer pipe of the guiding pipe 5 can provide guidance for the lifting movement of the first movable frame 4 below the top end of the assembly cabin 2, limit the movement range of the first movable frame 4, ensure the relative position correspondence between the conveying rollers 8 in the first movable frame 4 and the two conveying rollers 8 in the middle of the fixed frame 3, and can provide stable support and limiting effect for the oil pipe passing between the fixed frame 3 and the first movable frame 4. The bearings between the conveying rollers 8 and the fixed frame 3 and the first movable frame 4 can ensure the rotation ability of the conveying rollers 8. After the conveying rollers 8 cooperate with the fixed frame 3 and the first movable frame 4 to clamp the oil pipe, they can push the oil pipe to displace through their own rotation and the friction force with the outside of the oil pipe, so as to realize the pushing operation of the packer on the oil pipe.

[0032] The drive motor 6 is connected to the conveyor roller 8 through a speed reducer 7. The position of the conveyor roller 8 in the first movable frame 4 corresponds to the positions of the two conveyor rollers 8 in the middle of the fixed frame 3. A brake is provided in the drive motor 6. The drive motor 6 is used to drive the two conveyor rollers 8 in the middle of the fixed frame 3 to rotate, and then drive the entire device to perform the conveying work of the oil pipe and the packer. The speed reducer 7 is provided to limit the rotational speed of the drive shaft of the drive motor 6, avoiding the situation of slipping between the conveyor roller 8 associated with the drive motor 6 and the oil pipe due to the too fast rotational speed of the conveyor roller 8. The brake provided in the drive motor 6 can stop the drive motor 6 from working, that is, after the packer is pushed to the designated working position, the drive motor 6 will no longer work. Affected by its brake structure, the two conveyor rollers 8 associated with it are also locked. At the same time, the conveyor roller 8 in the first movable frame 4 is also locked by the corresponding locking device. The four conveyor rollers 8 that clamp the oil pipe are all locked, and there is only sliding friction between them and the oil pipe, and rolling friction will not continue to occur. Therefore, the positioning and fixing of the oil pipe and the packer can be effectively realized, ensuring the stability during the working process of the packer.

[0033] In this embodiment, as Figures 1 to 8 shown, the limiting component includes a pressure-receiving plate 17 fixedly connected to the outside of the sliding seat 15. The end of the pressure-receiving plate 17 extends to the outside of the second movable frame 12, and the pressure-receiving plate 17 is inclined downward. A weakening groove 18 is formed in the middle of the pressure-receiving plate 17. The setting of the weakening groove 18 makes the thickness value of the pressure-receiving plate 17 thinner and the strength weaker at the weakening groove 18, and it is more likely to deform under the action of an external force. It can deform and avoid at the weakening groove 18 when the pressure-receiving plate 17 receives a reaction force exceeding the range, preventing the pressure-receiving plate 17 from damaging the oil pipe during the clamping and limiting process. An insertion port 20 is formed in the middle of the top end of the first movable frame 4. The width value of the insertion port 20 is adapted to the width value of the pressure-receiving plate 17. A fixing port 21 is formed on the surface of the first movable frame 4 close to the second movable frame 12. One end of the conveyor roller 8 in the first movable frame 4 extending to the outside of the first movable frame 4 is fixedly connected with a locking head 22. When the whole device needs to perform the pushing work of the oil pipe and the packer, the electric telescopic rod 11 drives and pushes the second movable frame 12 together with the whole limiting component to move to the working position. The end of the pressure-receiving plate 17 is inserted from the insertion port 20 and presses against the top of the first movable frame 4, thereby realizing the pressing and limiting of the first movable frame 4, avoiding the pressure generated by the conveyor roller 8 in the first movable frame 4 on the oil pipe from changing due to the size change of the oil pipe. The position of the limiting component can be adjusted by the adjusting component, indirectly adjusting the pressure applied to the limiting component, and cooperating with the elastic force of the first spring 10 to jointly form a clamping force on the oil pipe, so that the conveyor roller 8 on the first movable frame 4 can stably apply sufficient clamping force on the oil pipe, thereby ensuring the stable progress of the conveying process.

[0034] The adjusting assembly includes a servo motor 13 fixedly connected to the bottom end of the second movable frame 12. A screw rod 14 is movably connected to the second movable frame 12 through a bearing. The screw rod 14 is threadedly connected to the sliding seat 15, and the bottom end of the screw rod 14 is fixedly connected to the drive shaft of the servo motor 13. When the servo motor 13 works, it can drive the screw rod 14 in the second movable frame 12 to rotate through its drive shaft, and then push the sliding seat 15 to move up and down in the second movable frame 12 through the thread outside the screw rod 14, thereby changing the relative positions between the sliding seat 15, the limiting assembly and the locking assembly and the second movable frame 12, so that the related structures outside the sliding seat 15 can all adaptively adjust following the change of the size of the oil pipe, and generate adaptive adjustment without affecting the working effect. A pressure sensor 19 is sleeved in the middle of the end of the pressure plate 17. The pressure plate 17 is electrically connected to the servo motor 13 through a circuit. Through holes adapted to the size of the circuit are opened on the pressure plate 17 and the weakening groove 18. The setting of the pressure sensor 19 can monitor the reaction force received by the entire pressure plate 17, and then monitor the pressure condition received by the pressure plate 17 during the conveying process. It can not only avoid damaging the oil pipe due to excessive extrusion of the oil pipe, but also judge the abnormality of the oil pipe and the packer during the conveying process based on the change of the pressure and make corresponding responses in time. The setting of the adjusting assembly can change the relative position between the limiting assembly and the second movable frame 12, so that while the relative position between the first movable frame 4 and the fixed frame 3 changes due to the influence of the size of the oil pipe, the position of the limiting assembly is also adjusted correspondingly, so as to ensure the initial limiting effect of the limiting assembly on the first movable frame 4. Secondly, during the positioning stage of the packer, the adjusting assembly can also increase the pressure on the first movable frame 4 by adjusting the positions of the sliding seat 15 and the limiting assembly, indirectly increasing the pressure of the conveying roller 8 in the first movable frame 4 on the oil pipe, but controlling it within the range that will not cause damage. At the same time, the block 16 on the second movable frame 12 can be made to correspond to the position of the fixing port 21 on the first movable frame 4, and then rely on the further push of the electric telescopic rod 11 to realize the docking of the block 16 and the fixing port 21. After ensuring the stable clamping of the oil pipe by the conveying roller 8 in the first movable frame 4, the position of the first movable frame 4 is locked, providing a stable and reliable basis for the positioning and fixing of the oil pipe and the packer.

[0035] In this embodiment, as Figures 8 to 11As shown, the locking assembly includes side plates 24 symmetrically installed on both sides of the sliding seat 15. The ends of the side plates 24 extend outward to the outside of the second movable frame 12 and are fixedly connected with a locking seat 25. A locking sleeve 26 is rotatably sleeved in the locking seat 25. A guiding surface 23 is provided on the outside of the locking head 22. A notch adapted to the shape of the guiding surface 23 is provided in the locking sleeve 26. The notch of the locking sleeve 26 is adapted to the external shape of the locking head 22, so that the locking sleeve 26 is sleeved on the outside of the locking head 22. After being locked itself, the conveying roller 8 in the first movable frame 4 can be locked by the locking head 22, so that the conveying roller 8 cannot rotate, further ensuring the clamping and positioning effect of the conveying roller 8 in the first movable frame 4 on the oil pipe. A limiting edge 27 sleeved in the locking seat 25 is fixedly connected to the locking sleeve 26. A second spring 28 and a plugging strip 30 are fixedly connected to the outside of the limiting edge 27. The end of the second spring 28 is fixedly connected with an annular plate 29. An activity cavity 9 adapted to the shapes of the limiting edge 27 and the annular plate 29 is provided in the locking seat 25. And the locking seat 25 is provided with a docking seat 31 adapted to the size of the annular plate 29. The opening of the activity cavity 9 can ensure that there is enough activity space between the locking sleeve 26 and the locking seat 25, and the movement range of the locking sleeve 26 is restricted by the limiting edge 27 to prevent the locking sleeve 26 from disengaging from the locking seat 25. Docking grooves 32 adapted to the shape of the plugging strip 30 and evenly distributed are provided on the docking seat 31. The design of the locking assembly enables the whole device, when in the packer positioning state, not only to position and fix the first movable frame 4, but also to synchronously lock the conveying rollers 8 in the first movable frame 4, thus preventing the conveying rollers 8 in the first movable frame 4 from rotating. Combined with the brake structure in the driving motor 6, this ensures that when in the packer positioning state, the conveying rollers 8 for conveying the oil pipe and the packer are all in a locked state, making the conveying rollers 8 unable to rotate and there being no rolling friction with the oil pipe, ensuring the positioning and fixing effect on the oil pipe and the packer.

[0036] The second spring 28 and the annular plate 29 are arranged to define the relative positional relationship between the locking sleeve 26 and the locking head 22. Before the locking sleeve 26 contacts the locking head 22, the locking sleeve 26 remains in a state of protruding from the locking seat 25 under the action of the elastic force of the second spring 28. In this state, the insertion strip 30 on the limiting edge 27 is separated from the docking groove 32 on the docking seat 31, and the locking sleeve 26 is not limited by the insertion strip 30 and the docking groove 32 and can rotate in the locking seat 25. Therefore, during the process of the second movable frame 12 driving the sliding seat 15 and the locking assembly to approach the outside of the first movable frame 4, after the inner side wall of the locking sleeve 26 contacts the outside of the locking head 22, it will be subjected to the extrusion force of the outer guiding surface 23 of the locking head 22. Under the action of the extrusion force, the locking sleeve 26 rotates inside the locking seat 25 to an angle adapted to the locking head 22, and then the sleeving between the locking sleeve 26 and the locking head 22 is realized. No matter what angle the locking head 22 rotates to following the conveying roller 8, the position of the locking sleeve 26 can be adjusted adaptively. During the process of the block 16 on the second movable frame 12 being inserted into the fixing port 21 outside the first movable frame 4, the locking head 22 further extrudes the locking sleeve 26, causing the locking sleeve 26 to contract into the locking seat 25 and driving the insertion strip 30 on the limiting edge 27 to be inserted into the docking groove 32 on the docking seat 31, realizing the synchronous locking of the locking sleeve 26 and the locking head 22. Thus, while the first movable frame 4 is locked by the second movable frame 12 and the block 16, the synchronous locking of the conveying roller 8 in the first movable frame 4 is realized, so that when the first movable frame 4 is fixed, the conveying roller 8 in the first movable frame 4 can no longer rotate, ensuring that the conveying roller 8 for pushing the oil pipe can cooperate with the fixing frame 3 and the first movable frame 4 to jointly provide a good positioning and fixing effect for the oil pipe and the packer.

[0037] The present invention covers any substitutions, modifications, equivalent methods and solutions made within the essence and scope of the present invention. For the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0038] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A packer pushing device for coal mines, characterized in that, It includes a mounting bracket, on which an assembly cabin is assembled. A fixing bracket is fixedly connected to the outside of the assembly cabin, and a driving motor and an electric telescopic rod are sleeved inside the assembly cabin. The top and bottom of the assembly cabin are connected to a first movable bracket through a guiding tube. Conveyor rollers are sleeved in both the fixing bracket and the first movable bracket. Electric telescopic rods are symmetrically installed in the assembly cabin. The end of the driving shaft of the electric telescopic rod is fixedly connected to a second movable bracket. A clamping block is fixedly connected to the outside of the second movable bracket, and a sliding seat is sleeved in the second movable bracket. A fixing opening adapted to the shape of the clamping block is formed in the first movable bracket. A limiting component, which is used to press and limit the first movable bracket when pushing the oil pipe and the packer, and is connected between the limiting component and the sliding seat; An adjusting component, which is used to adjust the relative position between the limiting component and the second movable bracket, and is connected between the adjusting component and the second movable bracket; A locking component, which is used to lock the conveyor roller in the first movable bracket, and is connected between the locking component and the sliding seat.

2. The packer pushing device for coal mines according to claim 1, characterized in that, The guiding tube is composed of an outer tube and an inner tube. The bottom end of the inner tube is fixedly connected to the top of the first movable bracket, and the top end of the outer tube is fixedly connected to the top of the assembly cabin. A first spring surrounding the outside of the guiding tube is fixedly connected between the assembly cabin and the top of the first movable bracket. The first movable bracket is directly above the fixing bracket.

3. The packer pushing device for coal mines according to claim 1, characterized in that Both the fixing bracket and the first movable bracket are movably connected to the conveyor roller through bearings. There are four conveyor rollers in the fixing bracket. Both ends of the two conveyor rollers on both sides are movably connected to the fixing bracket through bearings. One end of the two conveyor rollers in the middle is associated with the driving shaft of the driving motor.

4. The packer pushing device for coal mines according to claim 1, characterized in that, The driving motor is connected to the conveyor roller through a speed reducer. The positions of the conveyor rollers in the first movable bracket correspond to the positions of the two conveyor rollers in the middle in the fixing bracket. A brake is provided in the driving motor.

5. The packer pushing device for coal mines according to claim 1, characterized in that The limiting component includes a pressing plate fixedly connected to the outside of the sliding seat. The end of the pressing plate extends to the outside of the second movable bracket, and the pressing plate inclines downward. A weakening groove is formed in the middle of the pressing plate.

6. The packer pushing device for coal mines according to claim 5, characterized in that, The adjusting component includes a servo motor fixedly connected to the bottom end of the second movable bracket. A screw rod is movably connected to the second movable bracket through a bearing. The screw rod is threadedly connected to the sliding seat, and the bottom end of the screw rod is fixedly connected to the driving shaft of the servo motor.

7. The packer pushing device for coal mines according to claim 6, characterized in that, A pressure sensor is sleeved in the middle of the end of the pressing plate. The pressing plate is electrically connected to the servo motor through a circuit. Through openings adapted to the size of the circuit are formed in the pressing plate and the weakening groove.

8. The packer pushing device for coal mines according to claim 7, characterized in that, An insertion opening is formed in the middle of the top end of the first movable frame. The width value of the insertion opening is adapted to the width value of the pressing plate. The fixing opening is formed on the side of the first movable frame close to the second movable frame. One end of the conveying roller in the first movable frame, which is close to the second movable frame, extends to the outside of the first movable frame and is fixedly connected with a locking head.

9. The packer pushing device for coal mines according to claim 8, characterized in that The locking assembly includes side plates symmetrically installed on both sides of the sliding seat. The ends of the side plates extend to the outside of the second movable frame and are fixedly connected with locking seats. A locking sleeve is rotatably sleeved in the locking seat. A guiding surface is formed on the outside of the locking head, and a notch adapted to the shape of the guiding surface is formed in the locking sleeve.

10. The packer pushing device for coal mines according to claim 9, wherein, A limiting edge sleeved in the locking seat is fixedly connected to the locking sleeve. A second spring and a plugging strip are fixedly connected to the outside of the limiting edge. The end of the second spring is fixedly connected with an annular plate. An activity cavity adapted to the shapes of the limiting edge and the annular plate is formed in the locking seat. The locking seat is provided with a docking seat adapted to the size of the annular plate. Docking grooves adapted to the shape of the plugging strip and evenly distributed are formed in the docking seat.

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