CN112872510A - Automatic feeding and discharging machine of petroleum pipe thread lathe - Google Patents

Abstract

The invention provides an automatic loading and unloading machine for an oil pipe thread lathe, comprising: a loading table area, a lowering table area, a roller conveying mechanism located between the upper and lower material table areas, a connection between the upper and lower material table areas and the roller conveying The feeding guide plate of the mechanism, the unloading guide plate connecting the unloading table area and the roller conveying mechanism, and the loading and unloading conveying mechanism; the end of the loading table area close to the roller conveying mechanism is lower and the end is provided with an adjustment stopper , one end of the unloading table area close to the roller conveying mechanism is higher and the end is provided with an anti-impact stopper. The roller conveying mechanism is used to convey the pipe to the processing area of the pipe thread lathe; the roller conveying mechanism includes: a frame, a conveying roller mechanism , conveying roller lifting adjustment mechanism; the loading and unloading conveying mechanism includes: loading and unloading plate, oil cylinder, guide sleeve and guide centralizing rod; , The pipes with female thread are automatically loaded and unloaded in batches to improve production efficiency.

Description

Automatic feeding and discharging machine of petroleum pipe thread lathe

Technical Field

The invention belongs to the technical field of petroleum pipe thread machining, and particularly relates to an automatic feeding and discharging machine of a petroleum pipe thread lathe.

Background

The drill pipe, drill collar, casing and oil pipe in the field of petroleum energy are important special pipes for oil field development and production, generally go into the well below the ground, each pipe is connected downwards one by means of male and female threads at two ends, particularly the drill pipe and drill collar are necessary tools for well drilling, during the well drilling process, the drill pipe and drill collar are frequently started and drilled one by one or three columns, and the connected threads are newly machined or repaired on a pipe thread lathe by using two or three wells.

The pipe threading lathe is a special machine for processing various petroleum pipe threads, and the pipe feeding and discharging machine is a special machine specially designed for the petroleum pipe threading lathe for processing various pipe connecting threads and other industries, and is suitable for automatic batch feeding and discharging operation of pipes for processing male and female threads of various drill rods, drill collars, casings and oil pipes with the length of about 9.5 meters and the diameter of 60-339 millimeters.

In the past, the common trolley supporting pipe fitting for oil field pipe thread processing and the loading and unloading method are as follows:

firstly, the original support trolley has the following functions when the male and female threads of the petroleum pipe are processed:

the trolley has the functions of pushing and pulling the pipe thread machine tool forward and backward on the track.

Secondly, the process of feeding and discharging the male and female threads of the pipe on each machine tool originally comprises the following steps:

floor required labor (5 people): the working sequence of the upper and lower materials of the machine tool is 12 steps, wherein the working sequence comprises a lifting worker (1 person), a manual counterweight, a righting (2 persons) and a push-pull retreating supporting trolley (2 persons): selecting materials, putting a hoisting rope into a gravity center position of a drilling tool for hoisting time (2 minutes) → hoisting to a field, putting a trolley support point (1 minute) → picking a rope sleeve trolley for feeding (2 minutes) → hoisting the tail of the drilling tool, returning the trolley to the tail support position of the drilling tool for processing one end thread (2 minutes) → tail hoisting, pushing the trolley to the gravity center point of the drilling tool for picking the rope sleeve (1 minute) → pulling the trolley for returning (1 minute) → hoisting the drilling tool at the support position for manually horizontally rotating and turning around (preparing to process the other end thread) (2 minutes) → pushing the trolley for feeding, returning the trolley to the tail support of the drilling tool for processing the other end thread (1 minute) → hoisting the trolley to the central point of the drilling tool (1 minute) → pulling the trolley for returning (1 minute) → hoisting the hoisting rope to put the gravity center position of the drilling tool, hoisting and hoisting to a finished product field (2 minutes), the time consumed by repeatedly hoisting and falling the threaded chamber at the two ends for processing each pipe on and off each machine tool is 18 minutes.

Thirdly, processing threads at two ends of each pipe:

1, hanging for the first time: the center of gravity of the pipe which is hoisted is placed at the supporting point of the trolley, the lifting hook rope sleeve is removed, and the pipe is pushed to enter the spindle hole of the indoor machine tool. The 2 nd time is hung: after the pipe is sent to a proper position of a chuck of the machine tool, the tail part of the pipe is lifted, the pipe is separated from the trolley, the trolley returns to a supporting position in a machining state, and the machine tool starts to machine threads. The 3 rd time use hangs: processing another thread, hoisting the tail part of the pipe, pushing the tail part of the pipe to the gravity center part of the pipe by a trolley, and pulling out the tail part of the pipeDrill rod(tube). 4, hoisting for the 4 th time: the rope is sleeved on the gravity center of the pipe to be lifted and exceeds the height of the pipe being processed by other machine tools, the other end of the pipe is manually turned horizontally to prepare for processing threads, and the turned pipe is placed on the supporting point of the trolley to push the trolley to feed. The 5 th time is hung: and hoisting the tail part, and retracting the trolley to the tail part to support and process the other head of thread, wherein the other head of thread is processed. The 6 th time is hung: the tail part is hoisted, the trolley is pushed to the gravity center part of the pipe to be supported, and the trolley pipe is pulled to exit the machine tool. The 7 th time uses and hangs: and hoisting the middle part of the pipe, and hoisting the pipe to a finished product place for placement.

Fourthly, the problems existing in the mode are as follows:

4.1, the center of the pipe on the supporting trolley deviates from the center of the main shaft of the machine tool, and the machine tool generates vibration when rotating, thereby influencing the precision of the machine tool and the thread quality of the processed pipe.

4.2, the pushing trolley is used for manually feeding the machine tool and is difficult to penetrate into the main shaft hole at one time to cause a chuck after frequent impact, the number of the pipe thread processing workshops in the oil field is 5, each machine tool is stopped and maintained for one week each year, the chuck is replaced at the cost of 2-3 ten thousand yuan, the precision of a main shaft bearing is reduced quickly due to frequent impact, and the thread processing quality and the number of drill collars for supplying drill rods are difficult to guarantee.

4.3, the trolley loading and unloading support mode has the advantages that each pipe needs to be lifted for 7 times for 18 minutes, each machine tool processes 20 head threads of 10 pipes per shift, each machine tool lifts for 70 times for 180 minutes, 5 pipe beds need to be lifted for 350 times, the machine tool is still in the loading or unloading stage (time) frequently, the other machine tool finishes the thread processing and needs the time for loading or unloading, at the moment, one or more machine tools are in the state of waiting for feeding or unloading by a crane, and actually, each machine tool can process 6 pipes on average and is far from quota, and the condition is frequently generated every day.

4.4, practice proves that the crane for processing the thread on the feeding and discharging of the original trolley is busy, the thread processing efficiency is low, the manual labor intensity is high, the safety factor is low, the support center line of the pipe is difficult to coincide with the center line of the machine tool, the manhole is inaccurate to collide, the service life of the machine tool is influenced, the processed thread surface has ripples, the jump of the sealing end surface is large, the surface roughness does not meet the requirements, the sealing is not good when the pipe is in threaded connection, and the like, because the development of the oil field is gradually strengthened, the drilling tool of a drilling team is frequently called urgently, the thread of a drill collar of a drill rod cannot be repaired, the thread of the drill collar is continuously used and is frequently released or the sealing surface is not sealed, the high-pressure drilling fluid drives the silt to be cut and damaged by the silt from the threaded connection part and the sealing surface, the fluid flow does not flow out through the drill head to cause short circuit, the fluid flow and the drill string at the drill, even the whole well is scrapped, the loss is very large, the feeding and discharging mode of the old feed pipe thread machine tool is low in efficiency, the well team is often in urgent need of waiting for the drilling of the drilling tool, the scale of the drill rod and drill collar thread processed by the pipe station is in urgent need of expanding, therefore, the thread processing lathe of the oil field drilling tool is prepared to be increased from 5 to 10, if the feeding and discharging mode is not changed, the thread processing efficiency is not improved, and the problem that the feeding and discharging mode of the crane and the trolley is lagged is solved due to the restriction, so that the research on a new feeding and discharging machine which reduces the utilization rate of the crane, has high thread processing efficiency, good thread processing quality and improves the safety factor and reduces the labor intensity of personnel is very necessary.

Chinese patent CN102756183A discloses a petroleum pipe thread repairing modular device, specifically disclosing that the processing auxiliary machine includes a frame and a centralizer, a panel turnover type feeding and discharging system, a push-pull mechanism and a transmission roller mechanism connected with the push-pull mechanism, which are arranged on the frame, and the structure can realize the feeding and feeding of the pipe thread lathe. But because the material loading of this structure and feed process all control through turning over board business turn over material device, will lead to turning over board business turn over material device and receive frequent striking, the precision drops very fast, and thread machining quality is difficult to guarantee, in addition, the centralizer of this structure plays the function of adjustment pipe position, but because processing pipe length about 9.5 meters, every pipe all has straightness and amount of deflection problem, only through not setting up the clamp tightly on the bottom sprag, still can't solve pipe center and lathe main shaft center skew, produce vibration when the lathe rotates, to the influence of lathe precision and the influence of the pipe thread quality of processing, and cause the problem of chuck after often striking.

Disclosure of Invention

In view of the above problems, the present invention provides an automatic feeding and discharging machine for petroleum pipe threading lathe, which is used for batch automatic feeding and discharging operations of male and female threaded pipes of various drill rods, drill collars, casings and oil pipes, so as to overcome the above disadvantages of the prior art.

The invention provides an automatic feeding and discharging machine of a petroleum pipe thread lathe, which comprises: the automatic feeding and discharging device comprises a feeding platform area, a discharging platform area, a roller conveying mechanism positioned between the feeding platform area and the discharging platform area, a feeding guide plate connecting the feeding platform area and the roller conveying mechanism, a discharging guide plate connecting the discharging platform area and the roller conveying mechanism, and a group of feeding and discharging conveying mechanisms arranged between the feeding platform area and the discharging platform area; the pipe thread lathe comprises a feeding platform area, a discharging platform area, a roller conveying mechanism and a pipe thread lathe, wherein the feeding platform area and the discharging platform area both consist of a group of heavy rails and stand columns supported below the heavy rails to form a support frame with an inclined surface; the roller conveying mechanism includes: the device comprises a rack, a plurality of groups of conveying roller mechanisms arranged on the rack, and a conveying roller lifting adjusting mechanism arranged on the conveying roller mechanism; go up unloading conveying mechanism and be used for transferring the pipe in the material loading platform district to roller conveying mechanism on to and transfer the pipe that finishes processing on the roller conveying mechanism to unloading platform district, go up unloading conveying mechanism and include: the roller conveying mechanism comprises two groups of upper and lower material plates, an oil cylinder, a guide sleeve and a guide centering rod which are separated by a certain distance, wherein the lower part of the oil cylinder is hinged to a rack of the roller conveying mechanism, a piston rod of the oil cylinder is hinged to the middle position of the upper and lower material plates, the guide sleeve is installed on the rack and located at two ends of the oil cylinder, the top of the guide centering rod is installed at two ends of the upper and lower material plates, the bottom of the guide centering rod is sleeved in the corresponding guide sleeve, the top surfaces of the upper and lower material plates are composed of two inclined surfaces in the same direction and clamping grooves connected between the two inclined surfaces, and the oil cylinder is controlled by a control valve and a synchronous flow distribution and collection valve in the.

Preferably, the conveying roller mechanism comprises a plurality of groups of uniformly distributed conveying rollers, the conveying rollers are arranged on the conveying roller lifting adjusting mechanism through bearing boxes on two sides, a speed reducer and a conveying roller driving motor are arranged on the bearing box on one side of the conveying roller, the conveying roller driving motor drives the conveying rollers to rotate through the speed reducer, the conveying rollers are V-shaped rollers, and the middle parts of the V-shaped rollers are used for supporting the pipes and driving the pipes to move forwards or backwards and enabling the vertical center lines of the pipes to be coincident with the vertical center line of the machine tool main shaft; the conveying roller lifting adjusting mechanism is used for ensuring that pipes with different specifications are consistent with a main shaft and a rotary support horizontal center line of a pipe threading lathe, and comprises: the conveying roller adjusting device comprises a plurality of rotating arms, a plurality of rotating arm shafts, a synchronous connecting rod and a conveying roller adjusting oil cylinder, wherein each conveying roller is arranged on a bearing seat on the corresponding rotating arm shaft; the piston rod of the adjusting oil cylinder is connected with the plurality of rotating arms in series through the synchronous connecting rod, when the piston rod acts, all the rotating arms rotate around respective rotating arm shafts, the rotating arm shafts drive the conveying roller to rotate around the rotating arm shafts at the same time, and the conveying roller is adjusted to be lifted or lowered relative to the horizontal center line of the machine tool spindle in the process of rotating around the rotating arm shafts.

Preferably, a plurality of groups of photoelectric switch controllers are installed on the conveying roller lifting adjusting mechanism, the photoelectric switch controllers sense different extension displacements of the connecting rods, the centers of pipes with different specifications are controlled to be consistent with the horizontal center of a machine tool spindle, the plurality of groups of photoelectric switch controllers correspond to pipes with corresponding specifications and sizes, the photoelectric switch controllers in corresponding positions are started by determining the pipes with the specifications, and when a measuring rod head on the synchronous connecting rod cuts off a light emitting loop, a photoelectric sensor sends a power supply signal for cutting off an oil supply electromagnetic valve of an oil cylinder, so that the conveying roller adjusting oil cylinder stops moving; the conveying roller adjusting oil cylinder is connected with the J-shaped three-position four-way electromagnetic valve through a bidirectional hydraulic lock, in order to prevent the oil cylinder from releasing pressure under the bearing condition of the carrier roller to enable a pipe to fall, the hydraulic circuit adopts the bidirectional hydraulic lock and the J-shaped three-position four-way electromagnetic valve control circuit, and the height of the conveying roller is guaranteed to be unchanged after the oil cylinder stops supplying oil.

Preferably, a limiting mechanism is arranged at the tail of the rack, the limiting mechanism is used for preventing the processed pipe from falling out of the rack due to the fact that the output process of the processed pipe exceeds an allowable range and preventing the overlong pipe from falling down and crushing the limiting device when the pipe is fed, and the limiting mechanism comprises: the limiting rotary shaft, the telescopic reset rod, the reset spring, the limiting switch, the limiting pressing block and the resetting pendulum bob are arranged at the tail part of the rack, the limiting rotary shaft is rotatably connected in the shaft sleeve at the tail part of the rack, the two connecting rods at the bottom of the telescopic reset rod are slidably connected on a track of the limiting rotary shaft, two ends of the reset spring are respectively connected with the bottoms of the two connecting rods, the resetting pendulum bob is fixed on the limiting rotary shaft through the limiting pressing rod, the limiting pressing block is arranged on the limiting rotary shaft, and the telescopic reset rod is pressed to deform and reset after deformation under the action of the reset spring; spacing briquetting and limit switch cooperation in the spacing pivot, the spacing pivot is rotatory when the pipe of output is in place to touch flexible release link plane, in the rotation process, epaxial spacing briquetting is pressed the limit switch rocking arm and is made it deflect and cut off the power supply, limit switch control conveying roller driving motor stall, the hydro-cylinder solenoid valve power supply action of flitch about simultaneously, the pipe after unloading conveying mechanism holds up the processing leaves stop gear to the unloading platform, when the pipe whereabouts feed of overlength, touch flexible release link and produce the pressurized deformation, the pipe is broken away from the back and is leaned on the pendulum that resets and deflect the return and resume the original state.

Preferably, the roller conveying mechanism is provided with two groups of guide wheels, the guide wheels are used for guiding the lifting and guiding of the pipe joint and the coupling part to prevent the phenomenon that the upper and lower material plates are impacted or clamped before death, the two groups of guide wheels are installed on the rack of the roller conveying mechanism and are positioned at two ends of the upper and lower material plates of each group of the upper and lower material conveying mechanism, the outer diameter of each guide wheel is higher than one part of the upper and lower material plates, and when the drill pipe joint passes through the guide wheels, the pipe joint is lifted up and smoothly continues to operate through the upper and lower material plates.

Preferably, an automatic pipe centering mechanism is mounted on the frame and near the machining area, the automatic pipe centering mechanism automatically keeps the centers of pipes with different diameters consistent with the center of a machine tool spindle and plays the role of a rotary supporting point during the pipe machining process, and the automatic pipe centering mechanism comprises: fixture that two symmetries set up, two fixture pass through the support mounting in the frame, every group fixture includes: the outer square guide sleeve is fixedly connected to a support, the inner square guide sleeve is mounted in the outer square guide sleeve and slides in a reciprocating manner in the outer square guide sleeve, the tail part of the rotary support oil cylinder is hinged to the outer square guide sleeve, a piston rod of the rotary support oil cylinder is hinged to the tail part of the inner square guide sleeve, one group of rotary support rollers arranged in parallel is mounted at the end part of the inner square guide sleeve through a roller support, the rotary support rollers of the two clamping mechanisms are used for clamping the outer wall of a pipe, the vertical support central lines and the horizontal support central lines of the two groups of rotary support rollers are consistent with the central line of a machine tool spindle, the horizontal central lines of the piston rods of the two rotary support oil cylinders are superposed with the horizontal central line of the machine tool spindle and push the rotary support rollers to move in the horizontal direction through the inner square guide sleeve and the roller support, two rotatory support hydro-cylinders adopt the reposition of redundant personnel collecting valve to carry out synchronous chucking and loosen the pipe, make the coincidence of pipe vertical center line and the vertical center line of lathe main shaft, the pipe is at the tight during operation of clamp, in order to prevent rotatory support hydro-cylinder working chamber pressure release and lead to the centre gripping of rotatory support gyro wheel not tight, cause the work piece to drop and take place the accident, and the hydro-cylinder working chamber adopts hydraulic pressure locking and prevents the pressurize scheme of hydro-cylinder inner chamber pressure release, makes the pipe remain throughout at rotatory support pressurize state, two rotatory support hydro-cylinder is connected with the reposition of redundant personnel collecting valve through two-way hydraulic pressure lock, the reposition of redundant personnel collecting valve is controlled through three-position four-way solenoid valve, three-position four-way solenoid valve receives the pressure condition in.

Preferably, the upper end surface of the feeding guide plate is provided with a slope surface, the bottom end of the slope surface is in butt joint with the outer edge of the V-shaped roller, the high end of the slope surface is in butt joint with the bottom end of the feeding platform area and is installed on the feeding platform area, and the slope surface of the feeding guide plate is used for guiding the falling process of the pipe in the process that the feeding and discharging conveying mechanism drives the pipe in the feeding platform area to fall; one side of the blanking guide plate close to the roller conveying mechanism is a vertical surface, the blanking conveying mechanism drives the pipe to ascend to a blanking table area, and the vertical surface of the blanking guide plate is used for guiding the ascending process of the pipe.

The invention has the advantages and positive effects that:

1. compared with the traditional trolley feeding and discharging, the invention changes the traditional crane root feeding and discharging, the mode that 10 pipes are processed by each machine tool after the root is turned around and lifted for 70 times is reduced to that each machine tool loads materials in batches, turns around in batches and discharges materials in batches and lifts for 3 times, and the utilization rate of the crane is reduced by 23 times. The labor for loading and unloading is reduced from 5 to 3. The vibration ripple that the center height of the pipe fitting supported by the original trolley swings up and down and left and right to make the processed thread surface have one deep and one shallow cut is eliminated in the thread processing quality. The machine tool protection avoids the damage of the impact on the chuck behind the machine tool caused by inaccurate hole entering of one time or multiple times of manual feeding. In the supply of drill pipe drill collars, the original 5 machine tools are expanded to 10 machine tools, so that the scope of the machine tools is increased, the exploration, development and production of drilling teams are favorably ensured, and the accidents of drill sticking and drill burying and well abandonment caused by untimely repair of pipe threads are avoided.

2. The invention designs an upper and lower material platform block with an inclined plane by utilizing the rolling characteristic of a cylindrical pipe, so that the pipe automatically and orderly rolls on the surface of the pipe, the upper and lower material platform block consists of 4 heavy rails, the heavy rails are positioned on an upright post and distributed on two sides of a main frame, a support close to one end of the main frame is connected with the main frame through respective guide plates, one ends of the two heavy rails of a feeding platform close to the frame are respectively provided with an adjusting stop dog for separating the pipes with different specifications when feeding, and one ends of the two heavy rails of the discharging platform close to the frame are respectively provided with an anti-impact stop dog for eliminating the radial impact force of a drill collar on a piston rod piece of an. In the process of feeding and discharging, the characteristic that the cylindrical pipe rolls on the inclined surface is also utilized, on the basis that the inclined pipe on the feeding and discharging table automatically rolls to generate displacement, a series of dynamic position changes of the pipe are completed through the feeding inclined surface and the discharging inclined surface of the feeding and discharging plate and the conveying roller inclined surface, and a pipe automatic feeding and discharging block is formed.

3. In the feeding and discharging process, the pipe material rolls along the inclined surface of the feeding plate and reaches the V-shaped opening to stop, the drill collar rolls to stop under the influence of the inertial force of the drill collar with the weight of about 3 tons, and the drill collar can give a radial impact force to the piston rod of the oil cylinder and the two centering rods.

4. The distance between two groups of oil cylinders of the feeding and discharging assembly is six meters, two oil cylinders are required to synchronously act during feeding and discharging, and in order to solve the synchronization problem, the oil circuit adopts a flow dividing and collecting valve to solve the synchronization problem.

5. In the invention, in order to keep the centers of pipes with different specifications consistent with a machine tool spindle and a rotating support central line, the conveying rollers are required to have a height adjusting function, the conveying rollers are adjusted by arranging the conveying roller lifting adjusting mechanism, and because the conveying rollers are uniformly distributed with an independent operation structure, the stable operation and uniform adjustment are ensured by the linkage property of the conveying roller lifting adjusting mechanism, and the weight problem of the pipes is considered, the conveying roller lifting adjusting mechanism and the conveying rollers are supported by a frame, so that the safe and stable work of an oil cylinder is ensured as much as possible.

6. In the invention, after the photoelectric limit sensor limits and stops signals, the oil supply of the oil cylinder of the conveying roller lifting is stopped, and in order to prevent the pressure relief pipe of the oil cylinder from falling under the condition of bearing the carrier roller, the hydraulic circuit adopts a bidirectional hydraulic lock and a J-shaped three-position four-way electromagnetic valve control circuit, so that the height of the conveying roller is kept unchanged after the oil cylinder stops supplying oil.

7. In order to prevent the processed pipe from falling out of a rack and falling down and crushing a limiting device in order to prevent the processed pipe from falling out of the rack and falling down and crushing the limiting device, the limiting device adopts a parallelogram structure, namely a height telescopic change principle, and can be deformed and restored under the coordination of a spring, the parallelogram mechanism is fixed on a rotating shaft at the tail part of the rack to form a limiting plane, a pressing block on the rotating shaft is matched with a limiting switch, the rotating shaft rotates when the output pipe is in place and touches the plane of the limiting mechanism, in the rotating process, a limiting block on the shaft is pressed on a rotating arm of the limiting switch to deflect and cut off the power, in addition, a heavy hammer is fixed under the rotating shaft, after the rotating shaft rotates, the gravity center of the heavy hammer is raised, the conveying roller stops rotating and simultaneously supplies power to an upper material plate electromagnetic, when the pipe to be processed falls down and supplies materials, the pipe touches the parallelogram limiting mechanism to generate compression deformation, and the pipe returns to the original state after being separated.

8. The diameters of the pipe body and the joint part of the middle drill rod are different, for example, a 5-inch drill rod is taken, the diameter of the pipe body is 127 mm, the diameter of the drill rod joint is 165 mm, the radius difference is 19 mm, when the pipe body moves on a conveying roller, the lower edge of the joint exceeds the plane of the conveying roller and falls by 19 mm, and guide wheels are arranged on two sides of an upper feeding plate and a lower feeding plate, so that the problems of clamping the upper feeding plate and the lower feeding plate and stopping the pipe can be effectively.

9. The invention solves the problems of large vertical and horizontal deviation of the center of the pipe and swinging of the pipe by arranging the automatic pipe centering mechanism, and eliminates the problem of vibration ripple of the processing surface caused by the non-concentricity of the pipe and the main shaft of the machine tool, thereby achieving the aim of automatic centering. According to the self structural problem of the automatic pipe centering mechanism, the problems that the two oil cylinders run synchronously and the rotary supporting and clamping pressure maintaining are needed to be solved are determined, the specific scheme is that the two rotary supporting oil cylinders are synchronized by adopting a flow dividing and collecting valve, when a pipe is processed and operated, in order to prevent the working cavity of the oil cylinder from being decompressed, the rotary supporting roller is not tightly clamped, so that a workpiece falls to cause an accident, the working cavity of the oil cylinder adopts a hydraulic locking and pressure maintaining scheme, and the pipe is always kept in a rotary supporting state.

Drawings

Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 is a working structure diagram of feeding and discharging in the process of machining the threads of the petroleum pipe in the prior art.

Fig. 2 is a front view of a block structure of a loading and unloading station according to an embodiment of the invention.

Fig. 3 is a top view of a block structure of a loading and unloading station according to an embodiment of the invention.

Fig. 4 is a side view of a block structure of a loading and unloading platform according to an embodiment of the invention.

Fig. 5 is a front view of a structure of a feeding and discharging conveying mechanism according to an embodiment of the invention.

Fig. 6 is a front view of a mounting structure of the feeding and discharging conveying mechanism on the frame according to the embodiment of the invention.

Fig. 7 is a top view of a mounting structure of the feeding and discharging conveying mechanism on the frame according to the embodiment of the invention.

Fig. 8 is a schematic diagram of a hydraulic structure of a loading and unloading oil cylinder according to an embodiment of the invention.

Fig. 9 is a schematic view illustrating a feeding process in the feeding and discharging table block and the feeding and discharging conveying mechanism according to an embodiment of the present invention.

Fig. 10 is a schematic view illustrating a feeding process in the feeding and discharging table block and the feeding and discharging conveying mechanism according to the embodiment of the present invention.

Fig. 11 is a schematic view illustrating a blanking process in the upper and lower blanking table blocks and the upper and lower blanking conveying mechanism according to an embodiment of the present invention.

Fig. 12 is a schematic view illustrating a blanking process in the upper and lower blanking table blocks and the upper and lower blanking conveying mechanism according to an embodiment of the present invention.

Fig. 13 is a schematic view illustrating a process of dropping the input pipe of the feeding and discharging conveying mechanism back into the V-shaped groove of the conveying roller according to the embodiment of the present invention.

Fig. 14 is a front view of a distribution structure of a roller conveying mechanism on a frame according to an embodiment of the present invention.

Fig. 15 is a plan view showing a distribution structure of a roller conveyor on a frame according to an embodiment of the present invention.

Fig. 16 is a side view of a roller conveying mechanism and conveying roller elevation adjusting mechanism mounting structure according to an embodiment of the present invention.

Fig. 17 is a side view of a roller conveying mechanism and a conveying roller elevation adjusting mechanism mounting structure according to an embodiment of the present invention.

Fig. 18 is a front view of the conveying roller according to the embodiment of the present invention at the lowermost position.

Fig. 19 is a front view of the conveying roller according to the embodiment of the present invention at the uppermost position.

Fig. 20 is a front view of the conveying roller and the conveying roller link at the lowest position according to the embodiment of the present invention.

Fig. 21 is a schematic diagram of a position structure of a conveying roller lifting adjusting mechanism and a photoelectric switch controller according to an embodiment of the invention.

Fig. 22 is a hydraulic schematic diagram of a feed roller cylinder hydraulic lock according to an embodiment of the invention.

Fig. 23 is a front view of a spacing device according to an embodiment of the invention.

Figure 24 is a side view of a spacing device according to an embodiment of the present invention.

FIG. 25 is a diagram illustrating the position of the tube feeding back stop mechanism according to an embodiment of the present invention.

Fig. 26 is a rear view of a connection structure of a spacing mechanism and a frame according to an embodiment of the invention.

Fig. 27 is a schematic view of a structure that a pipe to be processed falls on a limiting plate to generate compression deformation according to an embodiment of the invention.

Fig. 28 is a front view of a guide wheel mounting structure position according to an embodiment of the present invention.

Fig. 29 is a schematic view of an installation structure of an automatic pipe centering mechanism according to an embodiment of the present invention.

Fig. 30 is a schematic view showing a structure in which the pipe self-centering mechanism according to the embodiment of the present invention grips the largest pipe.

Fig. 31 is a schematic view showing a structure in which a pipe self-centering mechanism according to an embodiment of the present invention clamps a minimum pipe.

Fig. 32 is a hydraulic schematic diagram of synchronization and pressure holding of a pipe self-centering mechanism according to an embodiment of the present invention.

Fig. 33 is a front view of the overall structure according to an embodiment of the present invention.

FIG. 34 is a top view of an overall structure according to an embodiment of the invention.

Wherein the reference numerals include: a feeding platform area 1, a discharging platform area 2, a roller conveying mechanism 3, a frame 301, a conveying roller mechanism 302, a conveying roller lifting adjusting mechanism 303, a conveying roller 304, a speed reducer 305, a conveying roller driving motor 306, a bearing box 307, a rotating arm shaft 308, a rotating arm 309, a synchronous connecting rod 310, a conveying roller adjusting oil cylinder 311, a photoelectric switch controller 312, a bidirectional hydraulic lock 313, a J-shaped three-position four-way electromagnetic valve 314, a feeding guide plate 4, a discharging guide plate 5, a feeding and discharging conveying mechanism 6, a feeding and discharging plate 601, an oil cylinder 602, a guide sleeve 603, a guide centralizing rod 604, a three-position four-way electromagnetic valve 605, a synchronous flow dividing and collecting valve 606, a heavy rail 7, a stand column 8, an adjusting block 9, an anti-impact block 10, a limiting mechanism 11, a limiting rotating shaft 1101, a telescopic reset rod 1102, a reset spring 1103, a limiting pressure rod 1104, a limiting switch 1105, a limiting pressure block 1106, The device comprises a support 1301, an outer guide sleeve 1302, an inner guide sleeve 1303, a rotary support oil cylinder 1304, a rotary support roller 1305, a roller support 1306, a flow dividing and collecting valve 1307, a two-way hydraulic lock 1308, a three-position four-way solenoid valve 1309 and an earthquake-resistant electric contact pressure gauge 1310.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

Example 1

Referring to fig. 2-34, the invention provides an automatic feeding and discharging machine for a petroleum pipe thread lathe, comprising: the automatic feeding and discharging device comprises a feeding platform area 1, a discharging platform area 2, a roller conveying mechanism 3 positioned between the feeding platform area 1 and the discharging platform area 2, a feeding guide plate 4 connecting the feeding platform area 1 and the roller conveying mechanism 3, a discharging guide plate 5 connecting the discharging platform area 2 and the roller conveying mechanism 3, and a group of two feeding and discharging conveying mechanisms 6 arranged between the feeding platform area 1 and the discharging platform area 2; the feeding table area 1 and the blanking table area 2 both consist of a group of heavy rails 7 and a stand column 8 supported below the heavy rails 7 to form a support frame with an inclined surface, one end, close to the roller conveying mechanism 3, of the feeding table area 1 is lower, an adjusting stop block 9 is arranged at the end part of the feeding table area 1, the adjusting stop block 9 is used for separating pipes of different specifications when being fed, one end, close to the roller conveying mechanism 3, of the blanking table area 2 is higher, an anti-impact stop block 10 is arranged at the end part of the blanking table area 10, the anti-impact stop block 10 is used for eliminating radial impact force generated by a drill collar on a connecting rod piece of the feeding and blanking conveying mechanism 6 when blanking is carried out, and the roller conveying mechanism 3 is used for; the roller conveying mechanism 3 includes: a frame 301, a plurality of sets of conveying roller mechanisms 302 mounted on the frame 301, and a conveying roller elevation adjusting mechanism 303 mounted on the conveying roller mechanisms 302; go up unloading conveying mechanism 6 and be used for transferring the pipe on the material loading platform district 1 to roller conveying mechanism 3 to and transfer the pipe that has processed on roller conveying mechanism 3 to unloading platform district 2, go up unloading conveying mechanism 6 and include: an upper material plate 601, a lower material plate 601, an oil cylinder 602, a guide sleeve 603 and a guide righting rod 604, the lower part of the oil cylinder 602 is hinged on the frame 301 of the roller conveying mechanism 3, the piston rod earrings of the oil cylinder 602 are hinged on the pin shafts at the middle parts of the upper and lower material plates 601, a group of two guide sleeves 603 are arranged on the frame 301 and positioned at the two ends of the oil cylinder 602, the top parts of a group of two guide righting rods 604 are connected with the two ends of the upper and lower material plates 601 through bolts, the bottom of the guide righting rod 604 is sleeved in a corresponding guide sleeve 603, the top surfaces of the upper and lower material plates 301 are composed of two inclined surfaces (a feeding inclined surface and a discharging inclined surface) in the same direction and a clamping groove connected between the two inclined surfaces, and the oil cylinders 602 are controlled by a three-position four-way electromagnetic valve 605 and a synchronous flow dividing and collecting valve 606 sharing the hydraulic direction, so that the oil cylinders 602 synchronously act.

Referring to fig. 14-22, in this embodiment, a frame 301 with a length of about fourteen meters is required for inputting and outputting a tube, a conveying roller 304 is arranged every two meters, and seven conveying rollers 304 are required for the total length, so that the conveying roller mechanism 302 includes seven uniformly arranged conveying rollers 304, each conveying roller 304 is provided with a speed reducer 305 with a certain number of revolutions and a conveying roller driving motor 306 with a certain power, in order to keep the centers of tubes with different specifications consistent with the main shaft of the machine tool and the rotation supporting center line, the conveying roller 304 needs to have a height adjusting function, for this purpose, the conveying roller 304 is mounted on a conveying roller lifting adjusting mechanism 303 through bearing boxes 307 on both sides, the speed reducer 305 and the conveying roller driving motor 306 are mounted on a bearing box 307 on one side of the conveying roller 304, the conveying roller driving motor 306 drives the conveying roller 304 to rotate, the middle part of the V-shaped roller is used for supporting the pipe and driving the pipe to advance or retreat; the delivery roller elevation adjusting mechanism 303 is used for ensuring that pipes with different specifications are consistent with a main shaft and a rotary supporting central line of the pipe threading machine, and the delivery roller elevation adjusting mechanism 303 comprises: the conveying device comprises a plurality of rotating arm shafts 308, a plurality of rotating arms 309, a synchronous connecting rod 310 and a conveying roller adjusting oil cylinder 311, wherein each conveying roller 304 is arranged on a bearing seat on the corresponding rotating arm shaft 308, the rotating arm shafts 308 are arranged on a rack 301 through bearing boxes 307 at two ends and are hinged on the synchronous connecting rod 310 through the rotating arms 309, the plane between the two shafts 304 and 308 forms an angle of 135 degrees with the rotating arms, the rotating arms 309 are uniformly hinged on the synchronous connecting rod 310, and a piston rod of the conveying roller adjusting oil cylinder 311 is hinged with one end of the synchronous connecting rod 310; the piston rod of the conveying roller adjusting cylinder 311 is connected in series with a plurality of rotating arms 309 through a synchronous connecting rod 310, when the piston rod acts, all the rotating arms 309 rotate around the respective rotating arm shafts 308, the rotating arm shafts 308 drive the conveying roller 304 to rotate around the rotating arm shafts 308 at the same time, and the conveying roller 304 is adjusted to be raised or lowered relative to the central line of the main shaft of the machine tool in the moving process, wherein the output shaft of the speed reducer 305 is connected with the shaft of the conveying roller 304 through a coupler.

Referring to fig. 14-22, sixteen kinds of photoelectric switch controllers 312 are installed on the conveying roller lifting adjusting mechanism 303 in this embodiment, the photoelectric switch controllers 312 sense different amounts of extension displacement of the connecting rods, so as to control the centers of pipes with different specifications to be consistent with the center of the spindle of the machine tool, sixteen groups of photoelectric switch controllers 312 correspond to pipes with corresponding specifications and sizes, and when determining that specification, the photoelectric switch controllers 312 in corresponding positions are started, and when the measuring rod on the synchronous connecting rod 310 cuts off the light emitting loop, the photoelectric sensors 312 send a power supply signal for cutting off the oil supply solenoid valve of the oil cylinder, so as to stop the movement of the conveying roller adjusting oil cylinder 311; the conveying roller adjusting oil cylinder 311 is connected with a J-shaped three-position four-way electromagnetic valve 314 through a bidirectional hydraulic lock 313, and in order to prevent a pressure relief pipe of the oil cylinder from falling under the condition of bearing of a carrier roller, a hydraulic loop adopts a control loop of the bidirectional hydraulic lock 313 and the J-shaped three-position four-way electromagnetic valve 314, so that the height of the conveying roller 304 is kept unchanged after the oil supply of the oil cylinder is stopped.

Referring to fig. 23 to 27, in the present embodiment, the tail portion of the frame 301 is provided with a limiting mechanism 11, the limiting mechanism 11 is used for preventing the processed pipe from falling out of the frame 301 and dropping out of the frame 301 when the output process of the processed pipe exceeds the allowable range, and preventing the overlong pipe from falling down and crushing the limiting device 11, the limiting mechanism 11 includes: the position-limiting rotary shaft 1101, the telescopic reset rod 1102, the reset spring 1103, the position-limiting pressure lever 1104, the position-limiting switch 1105, the position-limiting pressure block 1106 and the reset pendulum 1107 are arranged, a set of shaft sleeves is arranged at the tail of the rack 301, the position-limiting rotary shaft 1101 is rotatably connected in the shaft sleeves at the tail of the rack 301, two connecting rods at the bottom of the telescopic reset rod 1102 are slidably connected on the track of the position-limiting rotary shaft 1101, two ends of the reset spring 1103 are respectively connected with the bottoms of the two connecting rods of the telescopic reset rod 1102, the reset pendulum 1107 is installed on the position-limiting rotary shaft 1101 through the position-limiting pressure lever 1104, the position-limiting pressure block 1106 is installed on the position-limiting rotary shaft 1101, and the telescopic reset rod 1102 is; the limiting pressing block 1106 on the limiting rotating shaft 1101 is matched with the limiting switch 1105, when an output pipe is in place and touches the plane of the telescopic reset rod 1102, the limiting rotating shaft 1101 rotates, in the rotating process, the limiting pressing block 1106 on the shaft presses the rotating arm of the limiting switch 1105 to deflect and power off, the limiting switch 1105 controls the conveying roller driving motor 306 to stop rotating, meanwhile, the oil cylinder electromagnetic valve of the feeding and discharging plate 601 supplies power to act, the feeding and discharging conveying mechanism 6 lifts the pipe to leave the limiting mechanism 11, the limiting mechanism 11 deflects and returns by the reset pendulum mass 1107, when the overlong pipe falls and supplies, the overlong pipe touches the telescopic reset rod 1102 to generate compression deformation, and the pipe deflects and returns to the original state by the reset pendulum mass after being.

Referring to fig. 28, in the embodiment, since the diameters of the drill pipe body and the joint part are not the same, for example, a 5 inch drill pipe, the diameter of the pipe body is 127 mm, the diameter of the drill pipe joint is 165 mm, and the radius difference is 19 mm, when the pipe body moves on the conveying roller 304, the lower edge of the joint falls 19 mm beyond the plane of the conveying roller, two groups of guide wheels 12 are arranged on the roller conveying mechanism 3, so that the problem that the upper and lower material plates 601 are clamped and the pipe stops can be effectively avoided, the guide wheels 12 are used for guiding the lifting and guiding of the pipe joints and the coupling parts and preventing the phenomenon that the upper and lower material plates are impacted or stuck, two groups of four guide wheels 12 are arranged on the frame 301 of the roller conveying mechanism 3 and are positioned at the two ends of the upper and lower material plates 601 of the upper and lower feeding conveying mechanisms 6, the guide wheel 12 has an outer diameter higher than a portion of the upper and lower material plates 601, and raises the coupling when the tool joint passes through the guide wheel 12.

Referring to fig. 29 to 32, in the present embodiment, the automatic pipe centering mechanism 13 is mounted on the frame 301 near the machining area, the automatic pipe centering mechanism 13 is used for automatically keeping the centers of pipes with different diameters consistent with the center of the spindle of the machine tool and serving as a rotation supporting point during the pipe machining process, and the automatic pipe centering mechanism 13 includes: fixture that two symmetries set up, two fixtures pass through support 1301 and install in the frame, every group fixture includes: the pipe clamping device comprises an outer square guide sleeve 1302, an inner square guide sleeve 1303, rotary supporting oil cylinders 1304 and rotary supporting rollers 1305, wherein the outer square guide sleeve 1302 is fixedly connected to a support 1301, the inner square guide sleeve 1303 is installed in the outer square guide sleeve 1302 and slides in a reciprocating mode in the outer square guide sleeve 1302, the tail portion of each rotary supporting oil cylinder 1304 is hinged to the outer square guide sleeve 1302, piston rods of the rotary supporting oil cylinders 1304 are hinged to the tail portion of the inner square guide sleeve 1303, one group of rotary supporting rollers 1305 arranged in parallel is installed at the end position of the inner square guide sleeve 1303 through a roller support 1306, the rotary supporting rollers 1305 of the two clamping mechanisms are used for clamping the outer wall of a pipe, the supporting vertical center lines and the horizontal center lines of the two groups of rotary supporting rollers 1305 are consistent with the center line of a machine tool spindle, and the piston rods of the two rotary supporting oil cylinders 1304 push the rotary supporting rollers 1305, the two rotary supporting oil cylinders 1304 adopt a flow dividing and collecting valve 1307 to synchronously clamp and loosen pipes, when the pipes are clamped, in order to prevent the working chambers of the rotary supporting oil cylinders 1304 from being decompressed to cause untight clamping of rotary supporting rollers 1305 and cause accidents of dropping of workpieces, the working chambers of the oil cylinders adopt a hydraulic locking and pressure maintaining scheme for preventing inner cavities of the oil cylinders, so that the pipes are always kept in a rotary supporting and pressure maintaining state, the two rotary supporting oil cylinders 1304 are connected with the flow dividing and collecting valve 1307 through a two-way hydraulic lock 1308, the flow dividing and collecting valve 1307 is controlled through a three-position four-way electromagnetic valve 1309, and the three-position four-way electromagnetic valve 1309 receives the pressure condition of the working chambers of the rotary supporting oil cylinders 1304 through a shock-proof.

Referring to fig. 29-32, in the embodiment, the upper end surface of the feeding guide plate 4 is provided with a slope surface, the bottom end of the slope surface is butted with the outer edge of the V-shaped roller, the high end of the slope is butted with the bottom end of the feeding platform area 1 and is installed on the feeding platform area 1, the feeding and discharging conveying mechanism 6 drives the pipe in the feeding platform area 1 to fall, and the slope surface of the feeding guide plate 4 is used for guiding the falling process of the pipe; one side of the blanking guide plate 5 close to the roller conveying mechanism 3 is a vertical surface, the blanking conveying mechanism drives the pipe to ascend to a blanking table area, and the vertical surface of the blanking guide plate 5 is used for guiding the ascending process of the pipe.

Example 2

In this embodiment, a feeding table area 1 and a discharging table area 2 with inclined surfaces are designed by using the rolling characteristic of cylindrical pipes, so that the pipes automatically and orderly roll on the surfaces of the pipes, the feeding and discharging process of the roller conveying mechanism 3 also uses the rolling characteristic of the cylindrical pipes on the inclined surfaces of the inclined surfaces, and a series of dynamic position changes of the pipes are completed through the feeding inclined surfaces and the discharging inclined surfaces of the feeding plates 601 and the discharging plates and the V-shaped inclined surfaces of the conveying rollers 304 on the basis that the pipes on the inclined surfaces of the feeding table area 1 and the discharging table area 2 automatically roll to generate displacement, so as to form automatic feeding and discharging blocks of the pipes.

In the embodiment, in the feeding and discharging process, the pipe material rolls along the inclined plane of the feeding plate and reaches the V-shaped opening to stop, due to the influence of the inertia force of the heavy drill collar of nearly 3 tons or so, the drill collar rolls and stops to give a radial and axial impact force to the piston rod of the oil cylinder of the feeding and discharging conveying mechanism 3, and in order to prevent the piston rod and the oil cylinder from generating a bending radial impact force, the feeding and discharging plate 601 is provided with the guide centering rod 604 and the impact-proof stop 10 to decompose the radial force, so that the feeding and discharging oil cylinder 602 only bears the vertical axial gravity of the pipe.

In this embodiment, since the distance between the two oil cylinders 602 is six meters, the two oil cylinders 602 need to synchronously operate during loading and unloading, in order to solve the synchronization problem, the oil circuit adopts a flow dividing and collecting valve to solve the synchronization problem, and a group of oil cylinders 602 are controlled by a three-position four-way electromagnetic valve 605 and a synchronous flow dividing and collecting valve 606 which share the hydraulic direction, so that the oil cylinders 602 synchronously operate.

In order to prevent the processed pipe from falling out of the rack 301 and crushing the limiting device 11 when the processed pipe falls in order to prevent the output process of the processed pipe from exceeding the allowable range, the limiting device 11 adopts a four-bar parallelogram structure (telescopic reset rod), namely, a height telescopic change principle, and can be deformed and restored under the cooperation of a spring, and the parallelogram structure is fixed on a rotating shaft at the tail part of the rack to form a limiting plane.

The feeding and discharging process of the embodiment: before the specification of the processed pipe is determined, the adjusting stop dog 9 of the feeding table area 1 is adjusted, after the adjustment is completed, the upper and lower material plates 601 of the feeding and discharging conveying mechanism 6 are lifted to the right position to support the feeding pipe and separate the pipes to be processed, after the upper and lower material plates 601 descend, the separated pipes to be processed automatically roll to the feeding position (the position of the adjusting stop dog 9) to prepare for feeding for processing the next pipe. After the thread processing of one end of the pipe is finished, the roller conveying mechanism 3 withdraws the pipe from the machine tool to the position of the discharging platform and stops, when the feeding and discharging plate 601 rises and exceeds the V-shaped groove of the V-shaped roller (the conveying roller 304), the pipe to be discharged is jacked up by the inclined plane of the feeding plate 601 and rolls to one side of the discharging platform area 2 along the inclined plane, the feeding plate 601 continues to rise, the discharging pipe also simultaneously rises along the vertical plane of the discharging guide plate 5, and when the inclined plane of the feeding plate is consistent with the inclined plane of the discharging platform area 2, the pipe rolls to the discharging platform area 2 to. The feeding plate 601 continues to rise, when the feeding inclined plane exceeds the inclined plane of the feeding platform area 1, the tubes to be processed are supported by the feeding inclined plane, meanwhile, the side faces of the feeding plate separate the unwanted tubes, when the inclined plane of the feeding plate rises to exceed the height of the adjusting stop block 9, the fed tubes roll to the clamping grooves of the feeding plate 601 and stop rolling, when the feeding plate falls back to be lower than the V-shaped groove inclined plane of the V-shaped roller, the tubes roll to the center position of the V-shaped groove along the V-shaped groove inclined plane, the vertical central line of the conveying roller 304 coincides with the vertical neutral line of the rotary supporting mechanism and the vertical central line of the machine tool, and the.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (7)

1. The utility model provides a petroleum pipe thread lathe automatic feeding and discharging machine which characterized in that includes: the automatic feeding and discharging device comprises a feeding platform area, a discharging platform area, a roller conveying mechanism positioned between the feeding platform area and the discharging platform area, a feeding guide plate connecting the feeding platform area and the roller conveying mechanism, a discharging guide plate connecting the discharging platform area and the roller conveying mechanism, and a group of feeding and discharging conveying mechanisms arranged between the feeding platform area and the discharging platform area; the pipe thread lathe comprises a feeding platform area, a discharging platform area, a roller conveying mechanism and a pipe thread lathe, wherein the feeding platform area and the discharging platform area both consist of a group of heavy rails and stand columns supported below the heavy rails to form a support frame with an inclined surface; the roller conveying mechanism includes: the device comprises a rack, a plurality of groups of conveying roller mechanisms arranged on the rack, and a conveying roller lifting adjusting mechanism arranged on the conveying roller mechanism; go up unloading conveying mechanism and be used for transferring the pipe in the material loading platform district to roller conveying mechanism on to and transfer the pipe that finishes processing on the roller conveying mechanism to unloading platform district, go up unloading conveying mechanism and include: the roller conveying mechanism comprises two groups of upper and lower material plates, an oil cylinder, a guide sleeve and a guide centering rod which are separated by a certain distance, wherein the lower part of the oil cylinder is hinged to a rack of the roller conveying mechanism, a piston rod of the oil cylinder is hinged to the middle position of the upper and lower material plates, the guide sleeve is installed on the rack and located at two ends of the oil cylinder, the top of the guide centering rod is installed at two ends of the upper and lower material plates, the bottom of the guide centering rod is sleeved in the corresponding guide sleeve, the top surfaces of the upper and lower material plates are composed of two inclined surfaces in the same direction and clamping grooves connected between the two inclined surfaces, and the oil cylinder is controlled by a control valve and a synchronous flow distribution and collection valve in the.

2. The automatic feeding and discharging machine for the petroleum pipe thread lathe according to claim 1, wherein the conveying roller mechanism comprises a plurality of groups of uniformly distributed conveying rollers, the conveying rollers are mounted on a conveying roller lifting adjusting mechanism through bearing boxes on two sides, a speed reducer and a conveying roller driving motor are mounted on the bearing box on one side of each conveying roller, the conveying roller driving motor drives the conveying rollers to rotate through the speed reducers, the conveying rollers are V-shaped rollers, and the middle parts of the V-shaped rollers are used for supporting the pipes and driving the pipes to move forwards or backwards and enabling the vertical center lines of the pipes to be coincident with the vertical center line of a machine tool main shaft; the conveying roller lifting adjusting mechanism is used for ensuring that pipes with different specifications are consistent with a main shaft and a rotary support horizontal center line of a pipe threading lathe, and comprises: the conveying roller adjusting device comprises a plurality of rotating arms, a plurality of rotating arm shafts, a synchronous connecting rod and a conveying roller adjusting oil cylinder, wherein each conveying roller is arranged on a bearing seat on the corresponding rotating arm shaft; the piston rod of the adjusting oil cylinder is connected with the plurality of rotating arms in series through the synchronous connecting rod, when the piston rod acts, all the rotating arms rotate around respective rotating arm shafts, the rotating arm shafts drive the conveying roller to rotate around the rotating arm shafts at the same time, and the conveying roller is adjusted to be lifted or lowered relative to the horizontal center line of the machine tool spindle in the process of rotating around the rotating arm shafts.

3. The automatic feeding and discharging machine of the petroleum pipe thread lathe as claimed in claim 1 or 2, wherein a plurality of sets of photoelectric switch controllers are mounted on the conveying roller lifting adjusting mechanism, the photoelectric switch controllers sense different extension displacements of the connecting rods, the centers of pipes with different specifications are controlled to be consistent with the horizontal center of the main shaft of the machine tool, the plurality of sets of photoelectric switch controllers correspond to the pipes with corresponding specifications and sizes, the photoelectric switch controllers in corresponding positions are started when the pipes with the specifications are determined, and when the measuring rod heads on the synchronous connecting rods cut off a loop, the photoelectric sensors send signals for cutting off the oil supply electromagnetic valve of the oil cylinder to stop the movement of the conveying roller adjusting oil cylinder; the conveying roller adjusting oil cylinder is connected with the J-shaped three-position four-way electromagnetic valve through a bidirectional hydraulic lock, in order to prevent the oil cylinder from releasing pressure under the bearing condition of the carrier roller to enable a pipe to fall, the hydraulic circuit adopts the bidirectional hydraulic lock and the J-shaped three-position four-way electromagnetic valve control circuit, and the height of the conveying roller is guaranteed to be unchanged after the oil cylinder stops supplying oil.

4. The automatic feeding and discharging machine for petroleum pipe thread turning lathe as claimed in claim 1, wherein the tail part of the frame is provided with a limiting mechanism for preventing the processed pipe from falling out of the frame and falling out of the frame beyond the allowable range during the output process and preventing the overlong pipe from falling down and crushing the limiting device during the feeding process of the pipe, and the limiting mechanism comprises: the limiting rotary shaft, the telescopic reset rod, the reset spring, the limiting switch, the limiting pressing block and the resetting pendulum bob are arranged at the tail part of the rack, the limiting rotary shaft is rotatably connected in the shaft sleeve at the tail part of the rack, the two connecting rods at the bottom of the telescopic reset rod are slidably connected on a track of the limiting rotary shaft, two ends of the reset spring are respectively connected with the bottoms of the two connecting rods, the resetting pendulum bob is fixed on the limiting rotary shaft through the limiting pressing rod, the limiting pressing block is arranged on the limiting rotary shaft, and the telescopic reset rod is pressed to deform and reset after deformation under the action of the reset spring; spacing briquetting and limit switch cooperation in the spacing pivot, the spacing pivot is rotatory when the pipe of output is in place to touch flexible release link plane, in the rotation process, epaxial spacing briquetting is pressed the limit switch rocking arm and is made it deflect and cut off the power supply, limit switch control conveying roller driving motor stall, the hydro-cylinder solenoid valve power supply action of flitch about simultaneously, the pipe after unloading conveying mechanism holds up the processing leaves stop gear to the unloading platform, when the pipe whereabouts feed of overlength, touch flexible release link and produce the pressurized deformation, the pipe is broken away from the back and is leaned on the pendulum that resets and deflect the return and resume the original state.

5. The automatic feeding and discharging machine for petroleum pipe thread turning lathe as claimed in claim 1, wherein two sets of guide wheels are provided on the roller conveying mechanism, the guide wheels are used for guiding the pipe joint and the coupling to be lifted and guided partially to prevent the pipe joint from hitting the upper and lower material plates or from being stuck before the pipe joint is lifted and guided, the two sets of guide wheels are mounted on the frame of the roller conveying mechanism and located at two ends of the upper and lower material plates of each set of feeding and discharging conveying mechanism, the outer diameter of the guide wheels is higher than a part of the upper and lower material plates, and when the drill pipe joint passes through the guide wheels, the pipe joint is lifted and smoothly passes through the upper and lower material.

6. An automatic loading and unloading machine for a petroleum pipe threading lathe as recited in claim 1, wherein an automatic pipe centering mechanism is mounted on said frame and near the machining area, said automatic pipe centering mechanism being adapted to automatically align the centers of pipes of different diameters with the center of the machine tool spindle and serving as a rotational support point during pipe machining, said automatic pipe centering mechanism comprising: fixture that two symmetries set up, two fixture pass through the support mounting in the frame, every group fixture includes: the outer square guide sleeve is fixedly connected to a support, the inner square guide sleeve is mounted in the outer square guide sleeve and slides in a reciprocating manner in the outer square guide sleeve, the tail part of the rotary support oil cylinder is hinged to the outer square guide sleeve, a piston rod of the rotary support oil cylinder is hinged to the tail part of the inner square guide sleeve, one group of rotary support rollers arranged in parallel is mounted at the end part of the inner square guide sleeve through a roller support, the rotary support rollers of the two clamping mechanisms are used for clamping the outer wall of a pipe, the vertical support central lines and the horizontal support central lines of the two groups of rotary support rollers are consistent with the central line of a machine tool spindle, the horizontal central lines of the piston rods of the two rotary support oil cylinders are superposed with the horizontal central line of the machine tool spindle and push the rotary support rollers to move in the horizontal direction through the inner square guide sleeve and the roller support, two rotatory support hydro-cylinders adopt the reposition of redundant personnel collecting valve to carry out synchronous chucking and loosen the pipe, make the coincidence of pipe vertical center line and the vertical center line of lathe main shaft, the pipe is at the tight during operation of clamp, in order to prevent rotatory support hydro-cylinder working chamber pressure release and lead to the centre gripping of rotatory support gyro wheel not tight, cause the work piece to drop and take place the accident, and the hydro-cylinder working chamber adopts hydraulic pressure locking and prevents the pressurize scheme of hydro-cylinder inner chamber pressure release, makes the pipe remain throughout at rotatory support pressurize state, two rotatory support hydro-cylinder is connected with the reposition of redundant personnel collecting valve through two-way hydraulic pressure lock, the reposition of redundant personnel collecting valve is controlled through three-position four-way solenoid valve, three-position four-way solenoid valve receives the pressure condition in.

7. The automatic feeding and discharging machine of the petroleum pipe thread lathe as recited in claim 1, wherein the upper end surface of the feeding guide plate is provided with a slope surface, the bottom end of the slope surface is butted with the outer edge of the V-shaped roller, the high end of the slope surface is butted with the bottom end of the feeding table area and is installed on the feeding table area, the feeding and discharging conveying mechanism drives the pipe of the feeding table area to fall, and the slope surface of the feeding guide plate is used for guiding the falling process of the pipe; one side of the blanking guide plate close to the roller conveying mechanism is a vertical surface, the blanking conveying mechanism drives the pipe to ascend to a blanking table area, and the vertical surface of the blanking guide plate is used for guiding the ascending process of the pipe.

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