Movable screwing machine for dismounting and mounting mud bearing

Abstract

The utility model discloses a movable screwing machine for dismounting and mounting a mud bearing, which is characterized in that the movable screwing machine which works by a full hydraulic oil cylinder is arranged, power hydraulic oil is provided for a clamping oil cylinder, a rotary driving oil cylinder and a lifting adjusting supporting oil cylinder through a hydraulic power source, and the movable screwing machine is matched with a fixed bracket on an original working site; wherein the lifting adjusting supporting oil cylinder adjusts the support body to lift up and down to a proper height position, the clamping oil cylinder controls the clamping head to clamp or loosen the mud bearing, the rotating driving oil cylinder and the limiting switch are matched to drive the rotating frame and the clamping oil cylinder assembly to synchronously and alternately rotate upwards / downwards, and therefore the mud bearing is mounted or dismounted. According to the design equipment, the direction is conveniently moved and adjusted, the equipment is suitable for different occasions, the whole mud bearing can be disassembled and assembled through single-person operation, the intelligent automation degree is high, the torque value is more accurately set, the operation process is simpler and more convenient, the precision is high, the performance is reliable, a large amount of manpower and working hours are saved, and the speed is high.

Description

Technical Field

[0001] The utility model relates to mechanical tool equipment, in particular to a mobile screwdriver for disassembling and assembling a mud bearing of a drill rod. Background Art

[0002] Mud bearings are installed at the end of the drill pipe to connect the drill bit. Drill pipes are generally used in large and heavy workplaces such as oil drilling / coal mining / rock mining, so the drill pipe body is long and heavy. When installing or removing mud bearings, there are generally two ways:

[0003] 1. Set up a fixed bracket on the original workplace, place the drill pipe horizontally on the fixed bracket, and then workers use manual tools to install or remove the mud bearing. This work requires at least 3 workers to cooperate with each other to complete. The labor intensity of the workers is very high, but the work efficiency is very low;

[0004] 2. Use a large disassembly rack, which is fast; but this is a large special equipment, which is generally fixed in a fixed place. When using it, you must first use lifting equipment to lift the drill pipe onto a special transport vehicle and transport it to the installation site of the disassembly rack. Because the large disassembly rack is a circular structure, the drill pipe must be inserted from one end when placed, and then pushed to the appropriate position and clamped. Therefore, you must first use the lifting equipment to lift the drill pipe, and then push it from one end into the disassembly rack. This process requires the use of multiple special equipment for operation. Disassembly and assembly of workpieces is very inconvenient, time-consuming and labor-intensive, and the cost of transportation and various equipment is very high; especially for small drill collars, if a large disassembly rack is also used, it will be more costly for users and the disassembly work will be extremely inconvenient.

[0005] Therefore, the disassembly technology of the mud bearing on the existing drill pipe needs to be improved urgently. Summary of the invention

[0006] The utility model provides a mobile screwdriver for disassembling and assembling mud bearings. The mobile screwdriver adopts a fully hydraulic power device, utilizes a plurality of hydraulic cylinders to cooperate with each other, and is used in conjunction with a fixed bracket in the original workplace. The mobile screwdriver can be portable and movable to adjust the orientation, and can easily complete the disassembly and assembly of mud bearings.

[0007] The utility model adopts the following technical solutions.

[0008] A mobile screwdriver for disassembling and assembling a mud bearing comprises: a C-shaped screwdriver assembly, a hydraulic power source, a limit switch, a control box, and a mobile base trolley.

[0009] The control box is fixed on the mobile base trolley, and a main control board with a computer control program embedded therein is provided in the control box;

[0010] The bracket body of the C-shaped fastener assembly is located on the control box, and a C-shaped clamp is provided on the bracket body. Two clamping cylinders and a rotating drive cylinder are provided in the bracket body, and a lifting and adjusting support cylinder is provided under the bracket body; the lifting and adjusting support cylinder and the hydraulic power source are fixedly installed in the control box; the main control panel and the hydraulic power source, the clamping cylinder, the rotating drive cylinder, and the lifting and adjusting support cylinder of the C-shaped fastener assembly are electrically connected respectively; the hydraulic power source and the clamping cylinder, the rotating drive cylinder, and the lifting and adjusting support cylinder are connected through hydraulic pipes and provide them with power hydraulic oil; the clamping cylinder group acts on clamping the mud bearing; the rotating drive cylinder acts on driving the clamping cylinder group to rotate; the lifting and adjusting support cylinder acts on adjusting the height position of the bracket body of the C-shaped fastener assembly; the limit switch acts on sensing the operation of the rotating drive cylinder.

[0011] The C-shaped fastener assembly comprises a bracket body, a clamping cylinder assembly, a rotary drive cylinder, and a lifting and adjusting support cylinder.

[0012] The bracket body includes a fixed bracket, a rotating bracket, and a mounting bracket;

[0013] The rotating frame and the fixed frame are both provided with C-shaped openings with the same axis, the same direction and the same size;

[0014] The two inner end surfaces of the fixing frame are provided with C-shaped support rings around the C-shaped opening, and the upper and lower ends of the rear side of the fixing frame are provided with mounting ears;

[0015] The two outer end surfaces of the rotating frame are both provided with C-shaped suspension rings around the C-shaped opening, and a triangular plate is fixedly provided in the middle of the rear side surface of the rotating frame, and a waist-shaped hole is provided on the triangular plate;

[0016] The rotating frame is located inside the fixed frame, the C-shaped suspension ring of the rotating frame is placed on the C-shaped support ring, and the C-shaped openings of the rotating frame and the fixed frame together form a C-shaped clamping opening of the bracket body.

[0017] The clamping cylinder assembly includes two clamping cylinders, which are symmetrically fixed in the rotating frame along the same axis of the C-shaped clamp. The front ends of the two clamping cylinders are provided with clamping heads, which are both facing the C-shaped clamp. When the two clamping cylinders are working, they drive the two clamping heads to extend into the C-shaped clamp or return to the rotating frame synchronously, so that the clamping heads can clamp or release the mud bearing.

[0018] The rotary drive cylinder is a double-rod double-acting cylinder and is vertically installed at the rear end of the C-shaped clamp of the bracket body. The hinged joints at both ends of the cylinder piston rod are clamped on the mounting ears of the fixed frame, and the two hinged shafts in the middle of the cylinder barrel are clamped in the waist-shaped holes of the triangular plate of the rotating frame. When the rotary drive cylinder is working, the cylinder barrel slides up and down along the piston rod, and the hinged shaft of the cylinder barrel drives the rotating frame, and the rotating frame drives the clamping cylinder assembly to rotate synchronously upward / downward alternately. The C-shaped suspension ring of the rotating frame rotates around the C-shaped support ring of the fixed frame with an axial rotation angle of about 30 degrees, so that the rotating frame, the clamping cylinder assembly, and the rotary drive cylinder form an integral linkage in the fixed frame.

[0019] There are three limit switches, and the limit switch body is equipped with a sensing head, which are an upper limit switch, a middle limit switch, and a lower limit switch. They are fixed at the middle position of the rear side of the fixed frame through a mounting plate, facing the triangular plate on the rear side of the rotating frame, and act on the movement of the hinge shaft of the cylinder barrel of the sensing rotating drive cylinder. The two clamping cylinders, the rotating drive cylinder, and the limit switch cooperate with each other to realize the disassembly or assembly of the mud bearing on the drill pipe.

[0020] As a preferred embodiment, the clamping head includes a chuck seat, a sliding tooth plate, and a tension spring; there are two groups of tension springs, which are respectively arranged and connected to the two ends of the chuck seat and the sliding tooth plate; the piston rod of the clamping cylinder is extended into the chuck seat and fixed, and the piston rod drives the clamping head to extend outward or return inward; under the action of external force, the tension spring is deformed by force, and the sliding tooth plate slides in the arc surface of the chuck seat; corresponding guide strips are provided on the left and right sides of the clamping head.

[0021] As a preferred embodiment, the two inner end surfaces of the rotating frame are located above and below the C-shaped opening and are provided with vertical guide strip grooves symmetrically arranged along the axis; when the clamping assembly is installed, the two clamping cylinders are fixed in the rotating frame by screws, and the guide strip of the clamping head is located in the guide groove, which acts on the clamping head to prevent it from shifting when it moves up and down, and also has the function of bearing part of the rotational torque.

[0022] As a preferred solution, the mounting bracket is fixedly mounted at the lower end of the bracket body, and the piston rod of the lifting and adjusting support cylinder extends upward into the mounting bracket and is fixedly connected to the mounting bracket, driving the bracket body to lift and lower to adjust its position; the lower end of the lifting and adjusting support cylinder is also connected to a support frame, and the support frame is located below the mobile base trolley; when the mobile fastener machine is working, the lifting and adjusting support cylinder controls the support frame to move downward until it touches the ground, acting on the torque of the C-shaped fastener machine assembly and increasing the stability of the mobile base trolley.

[0023] As a preference, the control box is provided with operation buttons and display screens corresponding to various working programs, and the operation buttons and display screens are electrically connected to the main control board respectively.

[0024] As a preferred solution, the front end of the lower side of the mobile base trolley is equipped with two fixed casters, and the rear end is equipped with two universal casters. All four casters are heavy-duty casters, which can bear the large torque of the C-shaped fastener machine. A handrail is installed at the rear of the mobile base trolley for dragging during movement.

[0025] As a preferred solution, a protective cover is provided outside the rotary drive cylinder.

[0026] As a preferred option: This device uses an AC220V motor and only needs an ordinary socket board to plug in and work.

[0027] The beneficial effects of the utility model are as follows: a mobile buckle removal machine with full hydraulic cylinder operation is set, and the hydraulic power source provides power hydraulic oil to the clamping cylinder, the rotary drive cylinder, and the lifting and adjusting support cylinder, which cooperate with the fixed bracket of the work site, wherein the lifting and adjusting support cylinder adjusts the bracket body up and down to a suitable height position, the clamping cylinder controls the clamping head to clamp or loosen the mud bearing, and the rotary drive cylinder and the limit switch cooperate to drive the rotating frame and the clamping cylinder assembly to rotate synchronously upward / downward alternately, thereby completing the installation or removal of the mud bearing; the utility model design is portable and can be moved to adjust the orientation, which can be applied to different occasions, and the entire mud bearing can be disassembled and assembled by a single person. The equipment has a high degree of automation, more accurate torque value setting and simpler operation process, which can better reflect the current intelligent era, with high precision, reliable performance, saving a lot of manpower and working hours, and fast speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the overall appearance diagram of the utility model;

[0029] Figure 2 It is the internal schematic diagram of the utility model;

[0030] Figure 3 This is an exploded view of the C-shaped button screwing machine of the utility model;

[0031] Figure 4 This is a schematic diagram of the C-shaped button-twisting machine of the utility model;

[0032] Figure 5 This is a schematic diagram of the installation of the clamping cylinder assembly of the utility model;

[0033] Figure 6 This is a schematic diagram of the explosion of the chuck of the utility model;

[0034] Figure 7 This is a schematic diagram of the bottom surface of the mobile base trolley of the utility model;

[0035] Figure 8 It is a schematic diagram of the operating keys and display screen of the control box of the utility model.

[0036] Among them: 100-mobile button machine, 10-C-shaped button machine assembly, 11-bracket body, 111-fixed frame, 1111-C-type support ring, 1112-installation ear, 112-rotating frame, 1121-C-type suspension ring, 1122-triangle plate, b-waist hole, 1123-guide strip groove, aC-type mouth, AC-type clamping mouth, 113-mounting bracket, 12-clamping cylinder assembly, 121-clamping cylinder, 1211-clamping cylinder piston rod, 122-clamping head, 1221-clamping head seat, 1222-sliding tooth plate , 1223-tension spring, 1224-guide bar, 13-rotational drive cylinder, 131-cylinder piston rod, 132-hinge head, 133-cylinder barrel, 134-articulated shaft, 135-protective cover, 14-lifting and adjusting support cylinder, 141-support frame, 20-hydraulic power source, 30-limit switch, 31-upper limit switch, 32-middle limit switch, 33-lower limit switch, 34-mounting plate, 40-control box, 50-mobile base trolley, 51-fixed casters, 52-universal casters, S-mud bearing. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", "installation" and the like should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] See also Figure 1-Figure 8 A mobile screwdriver for disassembling and assembling a mud bearing, the mobile screwdriver (100) comprising: a C-shaped screwdriver assembly (10), a hydraulic power source (20), a limit switch (30), a control box (40), and a mobile base trolley (50).

[0042] The control box (40) is fixed on the mobile base trolley (50), and a main control board with a computer control program embedded therein is provided in the control box (40); a C-shaped clamp (A) is provided on the support body (11) of the C-shaped fastener assembly (10), and two clamping cylinder assemblies (12), a rotary drive cylinder (13), and a lifting and adjusting support cylinder (14) are provided in the support body (11); the lifting and adjusting support cylinder (14) and the hydraulic power source (20) are fixedly installed in the control box (40); the main control board and the hydraulic power source (20), the clamping cylinder (121), the rotary drive cylinder (13), and the lifting and adjusting support cylinder (14) of the clamping cylinder assembly (12) are electrically connected respectively; the hydraulic power source (50) and the clamping cylinder (121), the rotary drive cylinder (13), and the lifting and adjusting support cylinder (14) are connected respectively through hydraulic pipes and provide them with power hydraulic oil.

[0043] The fixed frame (111) and the rotating frame (112) of the support body (11) of the C-shaped fastener assembly (10) are both provided with C-shaped openings (a) that are coaxial, oriented in the same direction and of the same size; the C-shaped openings (a) of the rotating frame (112) and the fixed frame (111) together form a C-shaped clamping opening (A) of the support body (11); the rotating frame (112) is located inside the fixed frame (111), and the C-shaped suspension ring (1121) of the rotating frame (112) is placed on the C-shaped support ring (1111) of the fixed frame.

[0044] The two clamping cylinders (121) of the clamping cylinder assembly (12) are symmetrically fixedly installed in the rotating frame (112) along the same axis of the C-shaped clamp (A) in an upper and lower manner. The front ends of the two clamping cylinders (121) are each provided with a clamping head (122), and the clamping heads (122) are both facing the C-shaped clamp (A). When the two clamping cylinders (121) are working, they drive the two clamping heads (122) to synchronously extend into the C-shaped clamp (A) or return to the rotating frame (112); wherein the guide bar of the clamping head (122) is located in the guide bar groove of the rotating frame, so that the running direction of the clamping head (122) is not deviated.

[0045] The hinged joints (132) at both ends of the cylinder piston rod (131) of the rotary drive cylinder (13) are mounted on the mounting ears (1112) of the fixed frame (111), and the two hinged shafts (134) in the middle of the cylinder barrel (133) are inserted into the waist-shaped holes (b) of the triangular plate (1122) of the rotating frame (112); when the rotary drive cylinder (13) is working, the cylinder barrel (133) slides up and down along the cylinder piston rod (131), and the hinged shafts (134) are inserted into the waist-shaped holes (b) of the triangular plate (1122) of the rotating frame (112). 134) drives the rotating frame (112), and the rotating frame (112) drives the clamping cylinder assembly (12) to rotate synchronously at the same time. The C-shaped suspension ring (1121) of the rotating frame (112) rotates around the C-shaped support ring (111) of the fixed frame (111) at an axial rotation angle of about 30°, so that the rotating frame (112), the clamping cylinder assembly (12), and the rotary drive cylinder (13) form an integral linkage in the fixed frame (111).

[0046] There are three limit switches (30), each of which has a sensing head inside the body of the limit switch (30) and has a position recognition function. The limit switches (30) are respectively an upper limit switch (31), a middle limit switch (32), and a lower limit switch (33). The limit switches (30) are fixed at the middle position of the rear side of the fixed frame (111) through a mounting plate (34), facing the triangular plate (1122) on the rear side of the rotating frame (112), and act on the movement of the hinge shaft (134) on the cylinder barrel (133) of the sensing rotating drive cylinder (13).

[0047] The two clamping cylinders (121), the rotary drive cylinder (13) and the limit switch (30) cooperate with each other. When the clamping head (122) is in the process of clamping / relaxing the mud bearing (S), the rotary drive cylinder (13) drives the clamping cylinder assembly (12) to rotate upward / downward alternately, thereby realizing the removal or assembly of the mud bearing on the drill pipe.

[0048] The clamping head (122) has two groups of tension springs (1223), which are respectively arranged and connected to the two ends of the clamping head seat (1221) and the sliding tooth plate (1222); the piston rod (1211) of the clamping cylinder (121) extends into the clamping head seat (1221) and is fixed, and the piston rod (1211) drives the clamping head (122) to extend outward or return inward; under the action of external force, the tension spring (1223) is deformed by force, and the sliding tooth plate (1222) slides in the arc surface of the clamping head seat (1221); guide strips (1224) are provided on the left and right sides of the clamping head (122).

[0049] The mounting bracket (113) is fixedly mounted on the lower end of the bracket body (11); the support frame (141) is located below the mobile base trolley (50); the piston rod at the upper end of the lifting and adjusting support oil cylinder (14) drives the bracket body (11) to move up and down to adjust the position, and the piston rod at the lower end controls the support frame (141) to move downward until it contacts the ground. When the mobile buttoning machine (100) is working, the support frame (141) contacts the ground.

[0050] The working principle of the mobile button tightening machine of this utility model:

[0051] This mobile screwdriver is used for disassembling and assembling the mud bearing of the drill pipe. It is a device that works with all hydraulic cylinders, including a clamping cylinder group, a rotary drive cylinder, and a lifting and adjusting support cylinder. The hydraulic power source provides power hydraulic oil for multiple hydraulic cylinders. Among them, the clamping cylinder group acts to cooperate with the position recognition functions of the clamping / loosening, rotary drive cylinder and limit switch. The limit switch controls the reversing and start and stop of the solenoid valve in the rotary drive cylinder body to control the power hydraulic oil in and out of the cylinder barrel to realize the up and down movement of the cylinder barrel along the piston rod, thereby driving the clamping cylinder assembly to rotate upward and downward alternately to realize the screwdriver operation.

[0052] This equipment calculates the torque value accurately through computer control program, and can realize manual control and automatic control of fastening. Automatic control can greatly reduce labor intensity, improve operation accuracy, and have extremely high work efficiency. It adopts mobile design and can adapt to different work scenes, saving users the cost of transportation and various large equipment.

[0053] The working process of the mobile screwdriver of the utility model is as follows (taking the removal of mud bearing as an example)

[0054] Cooperating with the fixed bracket of the original work site, the mobile button tightening machine can be conveniently dragged. When operating, it only needs an ordinary power strip to plug in because it uses AC220V motor;

[0055] 1. First, place the drill pipe horizontally on the fixed bracket of the original workplace and fix it;

[0056] 2. Drag the mobile screwdriver to the position of the mud bearing of the drill pipe. The mud bearing is located in the C-shaped clamp of the mobile screwdriver.

[0057] 3. Start the hydraulic power source and manually operate the lifting cylinder operation button of the lifting and adjusting support cylinder to make the central axis of the C-shaped clamp of the mobile fastener machine almost coincide with the mud bearing. The lifting and adjusting support cylinder then controls the support frame to touch the ground, thereby firmly supporting the mobile fastener machine on the ground.

[0058] 4. Start the clamping cylinder group, and the two clamping heads clamp the mud bearing. Manually control the rotation drive cylinder to work. After determining the direction, switch to the automatic operation button. Press the automatic operation button, and the computer control program will accurately calculate the torque value and enter the working program. Stop and reset after reaching the set torque value.

[0059] The process is: clamping - rotating - releasing - rotating - clamping - rotating - resetting after repeated operation:

[0060] Under the computer control program, after the clamping cylinder group is started, the two clamping cylinders drive the clamping heads to extend to the C-shaped clamp to clamp the mud bearing, and then the rotary drive cylinder works to drive the rotating frame, and the rotating frame drives the clamping cylinder assembly to rotate upward synchronously. After the rotation shaft of the rotary drive cylinder touches the upper limit switch, the rotary drive cylinder stops. At this time, the computer controls the clamping cylinder to drive the clamping head to release the mud bearing and return it to the rotating frame. Then the rotary drive cylinder works to drive the rotating frame, and the rotating frame drives the clamping cylinder assembly to rotate downward in the opposite direction synchronously until the hinge shaft touches the upper limit switch. The clamping cylinder drives the clamping head to extend into the C-shaped clamp again to clamp the mud bearing, and then the rotary drive cylinder pushes the rotating frame to rotate upward again, and this is repeated many times until the mud bearing is tightened as required. After reaching the set torque value, the computer program controls the rotary drive cylinder to stop working, and then the clamping head releases the mud bearing and returns to its original position, and the rotary drive cylinder pushes the rotating frame to reset (back to the middle position); wherein, the rotary drive cylinder drives the rotating frame to rotate, and the rotation angle from the upper limit switch to the lower limit switch is 30°.

[0061] In the utility model, the method for installing and removing the mud bearing is consistent, and the reversing operation is sufficient; the drill pipe is fixed on the fixed support, and the worker places the mud bearing in the C-shaped clamp, starts the hydraulic power source, and the clamping head of the clamping cylinder clamps the mud bearing, and the lifting and adjusting support cylinder adjusts the central axis of the mud bearing of the C-shaped clamp of the mobile fastener machine to almost coincide with the drill pipe, and then the support frame is controlled to touch the ground, so as to firmly support the mobile fastener machine on the ground, and the rotary drive cylinder works to drive the rotating frame, and the rotating frame drives the clamping cylinder assembly to synchronously rotate downward to the lower limit switch first, and the subsequent working process is the same as the above until the mud bearing is tightened on the drill pipe.

[0062] The function of the limit switch in this utility model:

[0063] The limit switch is installed on the rear side of the fixed frame and is directly opposite to the triangular plate of the rotating frame. The hinge shaft of the rotating drive oil cylinder is located in the waist-shaped hole of the triangular plate. The induction head in the limit switch body faces the hinge shaft of the rotating drive oil cylinder. The cylinder barrel moves up and down along the piston rod under the pressure of the power hydraulic oil. When the hinge shaft moves to the limit switch induction head, the limit switch is triggered, and the limit switch sends a signal, which is used to control the reversing and start and stop work of the solenoid valve in the rotating drive oil cylinder body;

[0064] During operation, the upper limit switch and the lower limit switch respectively act to sense and limit the maximum upward and downward stroke positions of the cylinder barrel of the rotary drive cylinder, which is also the maximum rotation angle position of the rotary frame; when the cylinder barrel of the rotary drive cylinder moves upward to the sensing head of the articulated shaft triggering the upper limit switch, the upper limit switch sends a signal to control the solenoid valve of the rotary drive cylinder to lose power and stop continuing to move upward; under the action of the power hydraulic oil, the cylinder barrel moves downward along the piston rod in the opposite direction until the articulated shaft triggers the lower limit switch, and the lower limit switch sends a signal to control the solenoid valve of the rotary drive cylinder to lose power and stop continuing to move downward; under the action of the power hydraulic oil, the cylinder barrel moves upward again, and the cycle runs like this until the work is completed; the middle limit switch is in the original position, and the rotary drive cylinder is reset after the screwing work is completed, and finally stops at the middle position, which is convenient for manual disassembly and placement of workpieces.

[0065] The design and operation of the clamping head in this new experimental model: in the process of the rotary drive cylinder pushing the rotating frame to tighten the buckle, because the thread of the mud bearing has a pitch, the mud bearing will move axially by one pitch every time it rotates one circle. When the clamping head clamps the mud bearing, it must have an axial degree of freedom; therefore, when the clamped workpiece is working, the tension spring is deformed after being stressed, and the sliding tooth plate slides axially in the chuck seat; when the chuck workpiece is loosened, the sliding tooth plate is reset under the action of the tension spring, and then slides again when the clamped workpiece works again; the clamping head of this design can adapt to forward and reverse threads, and the sliding tooth plate can slide on both sides of the chuck seat.

[0066] The above description is only a preferred embodiment of the utility model, and the above specific embodiment is not a limitation of the utility model. Various deformations and modifications may occur within the technical concept of the utility model, and any modification, modification or equivalent replacement made by ordinary technicians in this field based on the above description belongs to the scope of protection of the utility model.

Claims

1. A mobile screwdriver for disassembling and assembling a mud bearing, the mobile screwdriver (100) comprising: a C-shaped screwdriver assembly (10), a hydraulic power source (20), a limit switch (30), a control box (40), and a mobile base trolley (50); characterized in that: The control box (40) is fixed on the mobile base trolley (50), and a main control board with a computer control program is provided in the control box (40); the support body (11) of the C-shaped fastener assembly (10) is located on the control box (40), and a C-shaped clamp (A) is provided on the support body (11); two clamping cylinder assemblies (12) and a rotary drive cylinder (13) are provided in the support body (11), and a lifting and adjusting support cylinder (14) is provided below the support body (11); the lifting and adjusting support cylinder (14) and the hydraulic power source (20) are fixedly installed in the control box (40); the main control board and the hydraulic power source (20), the clamping cylinder (121) of the clamping cylinder assembly (12), the rotary drive cylinder (13), and the lifting and adjusting support cylinder (14) are electrically connected respectively; the hydraulic power source (20) and the clamping cylinder (121), the rotary drive cylinder (13) and the lifting and adjusting support cylinder (14) are electrically connected to each other. ), and the lifting and adjusting support cylinder (14) are respectively connected through hydraulic pipes and provide them with power hydraulic oil; the clamping cylinder group (12) acts on clamping the mud bearing (S); the rotating drive cylinder (13) acts on driving the clamping cylinder group (12) to rotate; the lifting and adjusting support cylinder (14) acts on adjusting the height position of the bracket body (11) of the C-shaped fastener assembly (10); the limit switch (30) acts on sensing the operation of the rotating drive cylinder (13); The C-shaped fastener assembly (10) comprises a bracket body (11), a clamping cylinder assembly (12), a rotary drive cylinder (13), and a lifting and adjusting support cylinder (14); The bracket body comprises a fixed bracket (111), a rotating bracket (112), and a mounting bracket (113); The fixed frame (111) and the rotating frame (112) are both provided with C-shaped openings (a) that are coaxial, oriented in the same direction and have the same size; C-shaped support rings (1111) are provided on the two inner end surfaces of the fixing frame (111) around the C-shaped opening (a); mounting ears (1112) are provided on the upper and lower ends of the rear side of the fixing frame (111); The two outer end surfaces of the rotating frame (112) are both provided with C-shaped suspension rings (1121) around the C-shaped opening (a); a triangular plate (1122) is fixedly provided in the middle of the rear side surface of the rotating frame (112); and a waist-shaped hole (b) is provided on the triangular plate (1122); The rotating frame (112) is located inside the fixed frame (111); the C-shaped suspension ring (1121) of the rotating frame (112) is placed on the C-shaped support ring (1111); the C-shaped openings (a) of the rotating frame (112) and the fixed frame (111) together form a C-shaped clamping opening (A) of the bracket body (11); The clamping cylinder assembly (12) comprises two clamping cylinders (121), the two clamping cylinders (121) are symmetrically fixedly installed in the rotating frame (112) along the same axis of the C-shaped clamp (A) in the upper and lower directions, and the front ends of the two clamping cylinders (121) are each provided with a clamping head (122), and the clamping heads (122) are both facing the C-shaped clamp (A). When the two clamping cylinders (121) are working, the two clamping heads (122) are driven to synchronously extend into the C-shaped clamp (A) or return to the rotating frame (112), thereby achieving the clamping head (122) clamping or loosening the mud bearing (S); The rotary drive cylinder (13) is a double-rod double-acting cylinder and is vertically mounted at the rear end of the C-shaped clamp (A) of the bracket body (11). The hinge joints (132) at both ends of the cylinder piston rod (131) are clamped on the mounting ears (1112) of the fixed frame (111). The two hinge shafts (134) in the middle of the cylinder barrel (133) are clamped into the waist-shaped holes (b) of the triangular plate (1122) of the rotating frame (112). When the rotary drive cylinder (13) is working, the cylinder barrel (133) moves along the cylinder piston rod ( The rotating frame (112) and the clamping cylinder assembly (12) are driven by the hinge shaft (134) to rotate upward / downward alternately; the C-shaped suspension ring (1121) of the rotating frame (112) rotates around the C-shaped support ring (1111) of the fixed frame (111) at an axial rotation angle of about 30°, so that the rotating frame (112), the clamping cylinder assembly (12), and the rotary drive cylinder (13) form an integral linkage in the fixed frame (111); There are three limit switches (30), each of which has a sensing head inside, namely an upper limit switch (31), a middle limit switch (32), and a lower limit switch (33). The limit switches (30) are fixed to the middle position of the rear side of the fixed frame (111) through a mounting plate (34), facing the triangular plate (1122) on the rear side of the rotating frame (112), and act on the movement of the hinge shaft (134) on the cylinder barrel (133) of the sensing rotating drive cylinder (13); The two clamping oil cylinders (121), the rotary drive oil cylinder (13) and the limit switch (30) cooperate with each other to achieve the removal or assembly of the mud bearing on the drill pipe.

2. A mobile screwing machine for disassembling and assembling mud bearings according to claim 1, characterized in that: The clamping head (122) comprises a clamping head seat (1221), a sliding tooth plate (1222), and a tension spring (1223); The tension spring (1223) has two groups, which are respectively arranged and connected to the two ends of the chuck seat (1221) and the sliding tooth plate (1222); the piston rod (1211) of the clamping cylinder (121) extends into the chuck seat (1221) and is fixed, and the piston rod (1211) drives the clamping head (122) to extend outward or return inward; under the action of external force, the tension spring (1223) is deformed by force, and the sliding tooth plate (1222) slides in the arc surface of the chuck seat (1221); guide strips (1224) are provided on the left and right sides of the clamping head (122).

3. The mobile screwing machine for disassembling and assembling mud bearings according to claim 1, characterized in that: The two inner end surfaces of the rotating frame (112) are located above and below the C-shaped opening (a) and are provided with vertical guide grooves (1123) symmetrically arranged about the axis. When the clamping cylinder assembly (12) is installed, the two clamping cylinders (121) are fixedly installed in the rotating frame (112) by screws, and the guide strips (1224) of the clamping head (122) are located in the guide strip grooves (1123), which act on the clamping head (122) to prevent it from deviating when it moves up and down, and also have the function of bearing a part of the rotational torque.

4. The mobile screwing machine for disassembling and assembling mud bearings according to claim 1, characterized in that: The mounting bracket (113) is fixedly mounted on the lower end of the bracket body (11); the piston rod of the lifting and adjusting support oil cylinder (14) extends upward into the mounting bracket (113) and is fixedly connected to the mounting bracket (113); the lower end of the lifting and adjusting support oil cylinder (14) is also connected to a support frame (141), and the support frame (141) is located in the middle below the mobile base trolley (50); when the mobile fastener machine (100) is working, the lifting and adjusting support oil cylinder (14) controls the support frame (141) to move downward until it contacts the ground, thereby exerting a large torque on the C-shaped fastener machine assembly (10) carried thereon and increasing the stability of the mobile base trolley (50).

5. The mobile screwing machine for disassembling and assembling mud bearings according to claim 1, characterized in that: The control box (40) is provided with operation buttons and display screens corresponding to various working programs, and the operation buttons and display screens are electrically connected to the main control panel respectively.

6. The mobile screwing machine for disassembling and assembling mud bearings according to claim 1, characterized in that: The front end of the lower side of the mobile base trolley (50) is equipped with two fixed casters (51), and the rear end is equipped with two universal casters (52). The four casters are all heavy-duty casters and are used to carry the large torque of the C-shaped screwing machine. The rear side of the mobile base trolley (50) is equipped with a handrail for dragging during movement.

7. The mobile screwing machine for disassembling and assembling mud bearings according to claim 1, characterized in that: The rotary drive oil cylinder (13) is provided with a protective cover (135) outside.

8. The mobile screwing machine for disassembling and assembling mud bearings according to claim 1, characterized in that: The mobile button tightening machine (100) adopts an AC220V motor.

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