Full-automatic steel pipe airtightness detection machine

Abstract

The utility model relates to a full-automatic steel pipe airtightness detection machine, which comprises a water tank, a pipe inlet machine, an elevator, an airtightness machine and a pipe outlet machine, the pool is located in the middle, and the pipe inlet machine and the pipe outlet machine are located on the two sides of the pool respectively; the lifter is mounted at the water pool; a lifting frame of the lifter is mounted in the pool area; a driving element of the lifter is mounted outside the water pool and drives the lifting frame to do lifting motion in the water pool; airtight machines are mounted at two ends of a lifting frame of the lifter; the pipe feeding machine comprises a pipe storage frame, a pipe feeding supporting arm and a pipe feeding driving element; the pipe discharging machine comprises a pipe discharging frame, a pipe discharging supporting arm and a pipe discharging driving element; a plurality of pipe grooves are formed in the upper portions of the supporting plates. According to the utility model, the structure of the equipment is improved according to the airtight detection requirement of the long steel pipe, so that the whole long steel pipe can be reliably fed, fixed, detected and discharged in the detection process, and the bending deformation of the steel pipe is avoided.

Description

Technical Field

[0001] This utility model relates to a device for airtightness testing of steel pipes, particularly a device that can automatically feed, test, and discharge pipes, belonging to the field of automated mechanical equipment. Background Technology

[0002] Steel pipes, especially precision-drawn seamless steel pipes, generally require an airtightness test after being cut to length to ensure that there are no leaks such as sand holes on the pipe wall. The airtightness test typically uses an airtightness testing machine. Both ends of the steel pipe are sealed, then high-pressure air is injected, and the entire pipe is immersed in a water tank. The presence of bubbles in the water indicates whether the pipe wall is intact.

[0003] Chinese patents, such as CN103785626A (a fully automatic steel pipe air tightness testing machine), CN102519677A (a steel pipe air tightness testing device), and CN108709812A (a steel pipe water pressure tester), have disclosed some automated equipment specifically for testing the air tightness of steel pipes. However, in actual production, steel pipes are often tens of meters long. To achieve automated pipe feeding, testing, and discharge, and improve testing efficiency, further improvements to the equipment structure are needed. Utility Model Content

[0004] The purpose of this utility model is to provide a fully automatic steel pipe airtightness testing machine, which improves the equipment structure to achieve automated pipe feeding, testing, and pipe discharge, thereby improving testing efficiency and ensuring the reliability of steel pipes during the testing process.

[0005] To achieve the above-mentioned utility model objectives, this utility model provides a fully automatic steel pipe airtightness testing machine, including a water tank, a pipe inlet machine, a lift, an airtightness tester, and a pipe outlet machine;

[0006] The water tank is located in the middle, and the inlet pipe machine and outlet pipe machine are located on both sides of the water tank, respectively.

[0007] The elevator is installed at the water tank; the elevator frame is installed within the water tank area; the elevator drive element is installed outside the water tank, and the elevator drive element drives the elevator frame to move up and down within the water tank.

[0008] Airtight seals are installed at both ends of the lifting frame of the elevator;

[0009] The pipe feeder includes a pipe rack, a pipe feed support arm, and a pipe feed drive element; the pipe rack is located at the top and is equipped with a pipe feed ramp;

[0010] A pipe inlet support arm is connected to the lower side of the pipe dropper of the storage rack. The pipe inlet support arm is horizontally set above the pipe inlet machine. Several interval slots are provided on the inner side of the pipe inlet support arm along the Y-axis. The pipe inlet support arm is connected to the pipe inlet drive element. The interval slot part of the pipe inlet support arm can move inward to the top of the water tank.

[0011] The tube outlet machine includes a tube outlet support, a tube outlet arm, and a tube outlet drive element;

[0012] The pipe outlet support arm is horizontally set at the top of the pipe outlet machine. The inner side of the pipe outlet support arm is provided with several interval slots along the Y-axis. The pipe outlet support arm is connected to the pipe outlet drive element. The interval slot part of the pipe outlet support arm can move inward to the top of the water tank.

[0013] The pipe outlet frame is located above the pipe outlet support arm and is a slope that slopes outward and downward from the side of the pool. A pipe outlet lifting device is provided at the front of the pipe outlet frame, which lifts the steel pipe located in the interval groove of the pipe outlet support arm to the end of the pipe outlet frame.

[0014] The elevator is equipped with several driving elements, which are vertically arranged cylinders or hydraulic cylinders. The top of the piston rod output from the cylinder is connected to the lifting frame through a connecting arm.

[0015] The lifting frame is provided with several support plates at intervals along the X-axis, and several pipe grooves are opened on the upper part of the support plates along the Y-axis.

[0016] The airtight machine is located at both ends of the lifting frame and consists of several pipe end plugs and several parallel clamping drive elements connected to them; the pipe end plugs are connected to an external high-pressure air source through air pipes.

[0017] The spacing between the slots on the inlet pipe support arm, the spacing between the slots on the outlet pipe support arm, the spacing between the pipe slots on the lifting frame support plate, and the spacing between the pipe end plugs of the airtight machine are all equal and correspond one-to-one.

[0018] The projections of the inlet pipe support arm and the lifting frame's support plate on the X-axis intersect; the projections of the outlet pipe support arm and the lifting frame's support plate on the X-axis also intersect.

[0019] The X-axis represents the length of the steel pipe to be inspected, and the Y-axis represents the arrangement of the pipe inlet machine, water tank, and pipe outlet machine.

[0020] As a further improvement of this utility model, the pipe storage rack of the pipe feeder is composed of several racks spaced apart along the X-axis.

[0021] The lower part of the inlet support arm is equipped with a rack mechanism. A drive gear is installed on the inlet machine. The rotation shaft of the drive gear is connected to the output shaft of the inlet drive element. The drive gear meshes with the rack mechanism.

[0022] The tube outlet frame of the tube outlet machine consists of several frames spaced apart along the X-axis.

[0023] The lower part of the tube outlet support arm is equipped with a rack mechanism, and a drive gear is installed on the tube outlet machine. The rotation shaft of the drive gear is connected to the output shaft of the tube outlet drive element, and the drive gear meshes with the rack mechanism.

[0024] Furthermore, several tube feeding mechanisms consisting of tube feeding arms and drive gears are provided at intervals along the X-axis direction of the tube feeding machine.

[0025] The drive shafts of several tube inlet mechanisms are connected in series via connecting shafts to form a tube inlet mechanism group, which is connected to a tube inlet drive element;

[0026] The pipe feeding machine is equipped with one or more pipe feeding mechanism groups along the X-axis direction; the pipe feeding drive elements between the pipe feeding mechanism groups move synchronously;

[0027] Several tube-out mechanisms consisting of tube-out support arms and drive gears are provided at intervals along the X-axis of the tube-out machine.

[0028] The drive shafts of several tube outlet mechanisms are connected in series via connecting shafts to form a tube outlet mechanism group, which is connected to a tube outlet drive element.

[0029] The tube outlet machine is equipped with one or more tube outlet mechanism groups along the X-axis direction; the tube outlet drive elements between the tube outlet mechanism groups move synchronously.

[0030] Furthermore, a pipe-blocking mechanism is installed inside the pipe inlet machine;

[0031] The pipe-blocking mechanism includes a pipe-blocking rod, which is vertically arranged;

[0032] A pipe-stopping head is installed at the top of the pipe-stopping rod, and the lower part of the pipe-stopping rod is connected to the pipe-stopping drive element through a transmission mechanism or directly.

[0033] The pipe-stopping drive element drives the pipe-stopping rod to move up and down, causing the pipe-stopping head to rise and protrude out of the storage pipe slope, or causing the pipe-stopping head to fall down and land below the storage pipe slope.

[0034] Furthermore, the pipe lifting device includes a pipe lifting rod and a pipe driving element;

[0035] The pipe jacking rod is set vertically, and a jacking head is installed on the top of the pipe jacking rod. The top of the jacking head is provided with an outwardly inclined jacking slope.

[0036] The lower part of the pipe jacking rod is connected to the pipe jacking drive element either through a transmission mechanism or directly.

[0037] The jacking drive element drives the pipe jacking rod to move up and down. When it is lowered, the jacking head is completely below the slot of the pipe jacking support arm. The jacking drive element drives the pipe jacking rod to rise. During the process, the jacking slope of the jacking head supports the steel pipe and moves it up along the column of the pipe jacking frame until the jacking slope connects with the top of the slope of the pipe jacking frame.

[0038] Furthermore, the lower part of the stop rod is connected to the stop drive element via a swing arm connecting rod;

[0039] The lower part of the pipe jacking rod is connected to the pipe jacking drive element through a swing arm connecting rod;

[0040] Several swing arm links are arranged side by side along the X-axis, and the pivots of the swing arm links are connected together by a connecting shaft.

[0041] As a further improvement of this utility model, a pressure rod mechanism is provided at intervals on the lifting frame;

[0042] The lever mechanism includes a lever drive element, a lever operating rod, and several levers;

[0043] The pressure rod drive element is a cylinder or hydraulic cylinder set on one side of the lifting frame along the X-axis. The piston rod output from the cylinder is connected to a pressure rod operating rod set along the X-axis. The pressure rod operating rod is connected to the pressure rod one by one through several swing arms.

[0044] The pressure bar and the swing arm are positioned between two adjacent support plates;

[0045] The pressure rod drive element drives the pressure rod operating rod to extend and retract along the X-axis, which in turn drives the swing arm to swing. The swing arm drives the pressure rod located above it to swing through the swing arm shaft. When the pressure rod swings outward, it touches the side wall of the pool. When the pressure rod swings inward, it presses against the top of the steel pipe located on the support plate.

[0046] Furthermore, the drive element of the elevator is provided with an intermediate height pause position; when the piston of the drive element of the elevator is in the intermediate height pause position, the top of the pressure rod and the swing arm shaft is lower than the bottom of the gap groove of the inlet pipe support arm and the outlet pipe support arm.

[0047] Furthermore, the pressure rod is movably connected to the swing arm shaft, and the height position of the pressure rod on the swing arm shaft is adjustable.

[0048] This utility model of a fully automatic steel pipe airtightness testing machine improves the structure of the equipment to meet the airtightness testing requirements of long steel pipes. By connecting the connecting shaft, the pressure rod operating rod, and the connecting shaft between the transmission mechanism and the swing arm shaft of the transmission mechanism, the various mechanisms that need to move synchronously are connected in series. This reduces the number of driving components and improves the synchronous movement of the mechanism, ensuring that the entire long steel pipe can reliably enter, fix, test, and exit the pipe during the testing process, and avoiding bending and deformation of the steel pipe. Attached Figure Description

[0049] Figure 1 This is a top view of the overall structure of the fully automatic steel pipe airtightness testing machine of this utility model;

[0050] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0051] Figure 3 This is a front view of the overall structure of the fully automatic steel pipe airtightness testing machine of this utility model;

[0052] Figure 4 for Figure 2 A partially enlarged schematic diagram of the inlet pipe mechanism;

[0053] Figure 5 for Figure 3 A partially enlarged schematic diagram of the inlet pipe mechanism;

[0054] Figure 6 for Figure 5 A magnified view of a portion of the image;

[0055] Figure 7 for Figure 2 A partially enlarged schematic diagram of the testing facility in the image;

[0056] Figure 8 for Figure 3 A partially enlarged schematic diagram of the testing facility in the image;

[0057] Figure 9 for Figure 2 A partially enlarged schematic diagram of the outlet pipe mechanism;

[0058] Figure 10 for Figure 3 A partially enlarged schematic diagram of the outlet pipe mechanism;

[0059] Figure 11 for Figure 10 A magnified view of a portion of the image. Detailed Implementation

[0060] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0061] like Figure 1 The diagram shown is an overall structural schematic of the fully automatic steel pipe airtightness testing machine of this utility model. Further details can be found in the following references. Figure 2 , Figure 3 It includes a water tank 1, an inlet pipe machine 2, an elevator 3, an airtight machine 4, and an outlet pipe machine 5.

[0062] See Figure 1The coordinate system is shown in the diagram, with the X-axis representing the length direction and the Y-axis representing the width direction.

[0063] The water tank 1 is located in the middle (Y-axis direction), is long and narrow (X-axis direction), and has a certain height. It stores water or other solutions for airtightness testing. The water level basically reaches the middle and upper part of the water tank 1 to ensure that the steel pipe is fully submerged for airtightness testing. At the same time, it is a certain distance away from the top of the water tank 1 to prevent water surface fluctuations and large amounts of water overflowing from the edge of the water tank 1, thus wasting water resources.

[0064] The pipe inlet machine 2 and the pipe outlet machine 5 are located on both sides of the water tank 1, and the main body is a certain distance away from the two sides of the water tank 1. At the same time, the pipe inlet support arm 22 of the pipe inlet machine 2 and the pipe outlet support arm 52 of the pipe outlet machine 5 can extend inward to the top of the water tank 1 to realize the pipe drop and pipe connection respectively.

[0065] The elevator 3 is installed at the water tank 1; the lifting frame 31 of the elevator 3 is installed inside the water tank 1; the drive element 32 of the elevator 3 is preferably installed outside the water tank 1 to reduce water corrosion of the element and extend its service life. The drive element 32 can drive the lifting frame 31 to move up and down inside the water tank 1. The steel pipes to be tested for air tightness are placed side by side on the lifting frame 31. When the lifting frame 31 is raised, the steel pipes leave the water surface of the water tank 1, allowing for pipe entry and exit operations. When the lifting frame 31 is lowered, the steel pipes are immersed in the water of the water tank 1. At this time, high-pressure air is injected into the steel pipes to observe whether there is any air leakage.

[0066] Airtightness testers 4 are installed at both ends of the lifting frame 31 of the elevator 3. The airtightness testers 4 can seal the two ends of the steel pipe and inject high-pressure air into the steel pipe to perform airtightness testing.

[0067] For the specific structure of pipe inlet machine 2, please refer to Figure 4 , Figure 5 , Figure 6 It includes a storage rack 21, an inlet support arm 22, and an inlet drive element 23.

[0068] The storage rack 21 is located at the top and is specially equipped with a storage ramp 211. The steel pipe slides down along the storage ramp 211 using its own weight to realize the pipe dropping. Because the steel pipe to be tested is relatively long (X-axis direction), the storage rack 21 is composed of several racks spaced apart along the X-axis direction.

[0069] A pipe inlet support arm 22 is connected to the lower part of the pipe drop side of the pipe rack 21. The pipe inlet support arm 22 is horizontally set on the upper part of the pipe inlet machine 2, and the horizontal height of the pipe inlet support arm 22 is higher than the wall height of the water tank 1.

[0070] On the inner side of the inlet support arm 22 (the side closest to the water tank 1), there are several interval grooves 221 along the X-axis. The steel pipe to be fed rolls down from the storage rack 21 and falls into the interval groove 221. Each interval groove 221 stores one steel pipe to be fed and inspected. The interval grooves 221 separate the steel pipes so that the steel pipes correspond one-to-one with the plugs of the airtight machine 4.

[0071] The inlet pipe support arm 22 is driven by the inlet pipe drive element 23 to achieve horizontal telescopic movement along the Y-axis. Furthermore, the telescopic movement of the inlet pipe support arm 22 is transmitted by a rack and pinion mechanism. Specifically, a rack and pinion mechanism 222 is provided on the bottom surface of the inlet pipe support arm 22, and a drive gear 241 is mounted on the inlet pipe machine 2. The rotation shaft of the drive gear 241 is connected to the output shaft of the inlet pipe drive element 23, and the drive gear 241 meshes with the rack and pinion mechanism 222. The inlet pipe drive element 23 drives the drive gear 241 to rotate, thereby driving the rack and pinion mechanism 222, along with the inlet pipe support arm 22, to perform horizontal telescopic movement.

[0072] In this embodiment, the inlet pipe drive element 23 is a drive motor. The drive motor of the inlet pipe drive element 23 is generally heavy, so it is installed at the lower part of the inlet pipe machine 2. The output shaft of the inlet pipe drive element 23 is connected to the drive gear 241 through a belt or chain.

[0073] Furthermore, because the steel pipe to be inspected is relatively long (in the X-axis direction), several pipe-feeding mechanisms consisting of pipe-feeding support arms 22 and drive gears 241 are spaced apart along the X-axis direction of the pipe-feeding machine 2. To achieve synchronous movement among the pipe-feeding mechanisms, so that the long steel pipe can remain straight during movement, the drive shafts of the drive gears 241 of several pipe-feeding mechanisms are connected in series via connecting shafts 24, and driven by one or two pipe-feeding drive elements 23. (Reference) Figure 1 Along the length of the steel pipe (X-axis direction), the pipe inlet machine 2 is divided into two parts and manufactured separately; when in use, the two pipe inlet machines 2 are electrically connected to achieve synchronous operation.

[0074] A pipe-blocking mechanism is also installed inside the pipe inlet machine 2 to block the steel pipe located on the pipe storage rack 21, so as to realize the pipe dropping as needed. The pipe-blocking mechanism includes a pipe-blocking rod 27, which is set vertically. A pipe-blocking head 271 is installed on the top of the pipe-blocking rod 27, and the lower part of the pipe-blocking rod 27 is connected to the pipe-blocking drive element 29 through the transmission mechanism 28. The pipe-blocking drive element 29 drives the pipe-blocking rod 27 to move up and down through the transmission mechanism 28, so that the pipe-blocking head 271 rises and protrudes out of the pipe storage slope 211 to block the steel pipe and prevent the steel pipe from continuing to roll down, or the pipe-blocking head 271 falls down to the bottom of the pipe storage slope 211, so that the steel pipe can roll down along the pipe storage slope 211 onto the pipe inlet support arm 22.

[0075] In this embodiment, the stop pipe driving element 29 is a horizontally mounted pneumatic or hydraulic cylinder, and the transmission mechanism 28 is a swing arm connecting rod. The extension and retraction of the piston rod of the stop pipe driving element 29 drives the transmission mechanism 28 to swing, thereby driving the stop pipe rod 27 to move up and down. Of course, the stop pipe driving element 29 can also be directly mounted vertically, with the piston rod directly driving the stop pipe rod 27 to move up and down.

[0076] The infeed drive element 23 of the pipe feeder 2 works in conjunction with the pipe blocking drive element 29. When material needs to be fed onto the infeed support arm 22, the infeed drive element 23 and the pipe blocking drive element 29 move intermittently and alternately. When the infeed drive element 23 moves the empty spacer slot 221 above the infeed support arm 22 to the outlet of the storage slope 211, the pipe blocking drive element 29 moves rapidly, causing the pipe blocking head 271 to rise and fall rapidly once, allowing a steel pipe to roll down and fall into the spacer slot 221. Then, the infeed drive element 23 continues to move, causing the infeed support arm 22 to move inward (towards the water tank 1) by one spacer slot 221, so that the next empty spacer slot 221 moves to the outlet of the storage slope 211, and continues to wait for the steel pipe to roll down. The infeed drive element 23 is a servo motor, or a sensor is installed at the outlet of the storage slope 211 to detect whether the spacer slot 221 has moved into place and whether the steel pipe has rolled down into place. When a steel pipe is placed in each of the interval slots 221 on the inlet support arm 22, the feeding preparation of the pipe feeder 2 is completed. At this time, the front part of the inlet support arm 22 (interval slots 221 and steel pipes) extends beyond the frame of the pipe feeder 2 and is suspended between the pipe feeder 2 and the water tank 1. To maintain the suspension stability of the inlet support arm 22, guide wheels 226 are also provided at the inlet support arm 22 for guiding and supporting the inlet support arm 22.

[0077] For the specific structure of elevator 3 and airtight device 4, please refer to Figure 7 , Figure 8 .

[0078] The lifting platform 3 has several driving elements 32 spaced apart on both sides along the length of the pool 1. Each driving element 32 is a vertically arranged cylinder, with the top of its piston rod connected to the lifting frame 31 via a connecting arm. The lifting frame 31 has several support plates 33 spaced apart along the X-axis. The top of each support plate 33 has several pipe grooves 331, the spacing between which is equal to the spacing of the interval grooves 221 on the inlet pipe support arm 22. When the driving elements 32 fully raise the lifting frame 31 along with the support plates 33, the lower part of the pipe grooves 331 is higher than the top of the pool 1 and higher than the top surface of the interval grooves 221 on the inlet pipe support arm 22. Preferably, by setting a sensor, the driving element 32 has an intermediate height pause position. At this height, the top of the support plate 33 is lower than the bottom of the interval grooves 221 on the inlet pipe support arm 22, allowing the inlet pipe support arm 22 to freely extend and retract the steel pipe above the support plate 33 along the Y-axis.

[0079] The drive element 32 has a bottom height position, that is, when the drive element 32 drives the lifting frame 31 together with the support plate 33 to be completely lowered, the pipe groove 331 is located below the water surface of the water tank 1, that is, to ensure that all the steel pipes in the pipe groove 331 are submerged in water.

[0080] Furthermore, the lifting frame 31 is also provided with a pressure rod mechanism at intervals. The pressure rod mechanism includes a pressure rod driving element 36, a pressure rod operating rod 37, and several pressure rods 39. The pressure rod driving element 36 is preferably a cylinder or hydraulic cylinder arranged along the X-axis direction on one side of the lifting frame 31. The piston rod output from the cylinder is connected to a pressure rod operating rod 37. Several swing arms 38 are connected to the pressure rods 39 one by one on the pressure rod operating rod 37. The pressure rods 39 and the swing arms 38 are arranged between two adjacent support plates 33. The pressure rod driving element 36 drives the pressure rod operating rod 37 to extend and retract along the X-axis direction, thereby driving the swing arms 38 connected to the pressure rod operating rod 37 to swing. Finally, the swing arms 38 drive the pressure rods 39 located above them to swing through the swing arm shaft 392. When the pressure rods 39 swing outward, they touch the side wall of the pool 1 (e.g., Figure 7 As shown), that is, away from the area where the steel pipe is located, the steel pipe located inside the elevator 3 is not limited, and when the pressure rod 39 swings inward, it presses on the top of the steel pipe located on the support plate 33 (as shown). Figure 8 As shown, an upper limit is provided for the steel pipe.

[0081] Accordingly, when the intermediate height pause position of the drive element 32 of the elevator 3 is set, the top of the pressure rod 39, the swing arm shaft 392 and other components need to be lower than the bottom of the interval groove 221 of the inlet pipe support arm 22, so that the inlet pipe support arm 22 can drive the steel pipe to move freely in the Y-axis direction above the relevant components of the elevator 3.

[0082] Depending on the diameter of the steel pipe, the support plate 33 with different dimensions and positions of the pipe groove 331 can be replaced. At the same time, the height position of the pressure rod 39 on the swing arm shaft 392 can be adjusted so that the center height of the steel pipe remains the same after it is limited by the support plate 33 and the pressure rod 39, in order to adapt to the airtight machine 4. The steel pipe is omnidirectionally limited in cross-section by the cooperation of the pipe groove 331 of the support plate 33 and the pressure rod 39. At this time, when the airtight machine 4 presses the steel pipe from both ends and fills the steel pipe with compressed air, the steel pipe will not bend or deform due to the pressure at both ends, nor will it float and bend or deform in water due to buoyancy after the air is filled inside, as the overall average density decreases.

[0083] Because the steel pipe to be tested is relatively long (in the X-axis direction), pressure rod drive elements 36 are provided at both ends of the lifting frame 31, and pressure rod operation rods 37 are connected to the pressure rod drive elements 36 at both ends respectively; the pressure rod drive elements 36 at both ends are electrically connected and operate synchronously to achieve multiple top pressures along the length of the steel pipe to be tested.

[0084] The airtightness machine 4 is located at both ends of the lifting frame 31 and consists of several pipe end plugs 41 and several horizontally arranged clamping drive elements 42 connected to them along the X-axis. The pipe end plugs 41 are connected to an external high-pressure air source through air pipes. The clamping drive elements 42 are cylinders or hydraulic cylinders that drive the pipe end plugs 41 to extend and retract along the X-axis. The pipe end plugs 41 are matched with the size of the steel pipe to be tested. When the steel pipe to be tested is installed in place on the lifting frame 3, the clamping drive elements 42 of the airtightness machine 4 at both ends are activated, and piston rods extend towards the steel pipe, driving the pipe end plugs 41 to press against both ends of the steel pipe to be tested, achieving pipe end sealing. During the process of the lifting frame 3 driving the steel pipe and the airtightness machine 4 to descend, the air valve opens, allowing the external high-pressure air source to enter the steel pipe to be tested. The steel pipe is immersed in water. If there are defects in the pipe wall, high-pressure air will leak out from the defects, thereby generating bubbles in the water, which can be observed.

[0085] For the specific structure of the tube outlet machine 5, please refer to... Figure 9 , Figure 10 , Figure 11 The main structure is similar to that of the pipe inlet machine 2, including the pipe outlet frame 51, the pipe outlet support arm 52, and the pipe outlet drive element 53.

[0086] The outlet support arm 52 is horizontally positioned above the outlet machine 5. Preferably, the horizontal height of the outlet support arm 52 is the same as the horizontal height of the inlet support arm 22, or the horizontal height of the outlet support arm 52 is at least higher than the wall height of the water tank 1.

[0087] The inner side of the outlet pipe support arm 52 (the side closest to the water tank 1) is also provided with several interval grooves 521 along the X-axis. The interval of the interval grooves 521 in the X-axis direction is equal to the interval between the pipe grooves 331 of the support plate 33.

[0088] The tube outlet support arm 52 is driven by the tube outlet drive element 53 to achieve horizontal telescopic movement along the Y-axis. The telescopic movement of the tube outlet support arm 52 is also transmitted by a rack and pinion mechanism. Specifically, a rack and pinion mechanism 522 is provided on the bottom surface of the tube outlet support arm 52, and a drive gear 541 is mounted on the tube outlet machine 5. The rotation shaft of the drive gear 541 is connected to the output shaft of the tube outlet drive element 53, and the drive gear 541 meshes with the rack and pinion mechanism 522. The tube outlet drive element 53 drives the drive gear 541 to rotate, thereby driving the rack and pinion mechanism 522 and the tube outlet support arm 52 to perform horizontal telescopic movement.

[0089] The tube outlet drive element 53 is also a drive motor, which is installed at the lower part of the tube outlet machine 5; the output shaft of the tube outlet drive element 53 is connected to the drive gear 541 via a belt or chain.

[0090] Similarly, because the steel pipe to be inspected is relatively long (in the X-axis direction), several pipe-exiting mechanisms consisting of pipe-exiting support arms 52 and drive gears 541 are spaced apart along the X-axis direction of the pipe-exiting machine 5. To achieve synchronous movement among the pipe-exiting mechanisms, so that the long steel pipe can remain straight during movement, the drive shafts of the drive gears 5241 of several pipe-exiting mechanisms are connected in series via connecting shafts 54, and driven by one or two pipe-exiting drive elements 53. (Reference) Figure 1 Along the length of the steel pipe (X-axis direction), the pipe-exiting machine 5 is divided into two parts and manufactured separately; in use, the two pipe-exiting machines 5 are electrically connected to achieve synchronous operation.

[0091] A guide wheel 526 is also provided at the outlet support arm 52 to guide and support the outlet support arm 52.

[0092] After the steel pipe is inspected and marked as qualified or unqualified, the elevator 3 lifts the steel pipe out of the water to the highest point. During this process, the airtight device 4 detaches from the steel pipe. During this process, the pressure rod 39 is driven by the pressure rod drive element 36 and resets, so that the steel pipe is placed only on the support plate 33. At this time, the pipe discharge machine 5 starts, and the pipe discharge drive element 53 drives the pipe discharge support arm 52 to extend along the Y-axis and extend into the upper part of the water tank 1, located below the steel pipe, so that the interval groove 521 on the pipe discharge support arm 52 corresponds one-to-one with the steel pipe on the support plate 33, with exactly one interval groove 521 under each steel pipe. Then the elevator 3 lowers the steel pipe, and the steel pipe is transferred to the pipe discharge support arm 52. When the elevator 3 descends to a sufficient height (i.e., the intermediate pause height position of the drive element 32 set above), the pipe discharge drive element 53 reverses its operation, driving the pipe discharge support arm 52 and the steel pipe to leave the water tank 1.

[0093] Meanwhile, if continuous testing is required, the pipe feeder 2 is started, and the pipe feeder drive element 23 drives the pipe feeder arm 22, which has already arranged the steel pipes, to enter the upper part of the water tank 1. When it is in position, the steel pipes stored in the interval slots 221 of the pipe feeder arm 22 are exactly above the pipe slots 331 of the pallet 33. Then, the elevator 3 is started, driving the pallet 33 to rise. During the rising process, the pipe slots 331 of the pallet 33 catch the subsequent steel pipes to be tested, so that the steel pipes leave the pipe feeder arm 22. After the elevator 3 is fully raised, the steel pipes are fully separated from the pipe feeder arm 22. Then, the pipe feeder drive element 23 drives the pipe feeder arm 22 to move in the opposite direction to reset. When the pipe feeder arm 22 is below the pipe storage rack 21, the pipe feeder drive element 23 cooperates with the pipe blocking drive element 29 to continue to place the next steel pipe to be tested on the pipe feeder arm 22. When the inlet support arm 22 leaves the top of the water tank 1, the pressure rod drive element 36 and the clamping drive element 42 press the steel pipe at the top and clamp the steel pipe at both ends. Then the elevator 3 lowers fully and immerses the steel pipe in the water. The connection valve of the external high-pressure air source is opened to introduce high-pressure air into the steel pipe for testing.

[0094] After the pipe outlet support arm 52, carrying the inspected steel pipe, is reset by the pipe outlet drive element 53, it is necessary to completely output the steel pipe temporarily stored on the pipe outlet support arm 52. In this embodiment, the pipe outlet frame 51 is used for output.

[0095] The pipe outlet frame 51 is located above the pipe outlet support arm 52 and is a slope that slopes outward and downward from the side of the water tank 1. A pipe outlet lifting device is provided at the front of the pipe outlet frame 51, including a pipe outlet jacking rod 57 and a pipe jacking drive element 59. The pipe outlet jacking rod 57 is vertically arranged, and a pipe jacking head 571 is installed on the top of the pipe outlet jacking rod 57. The top of the pipe jacking head 571 has an outwardly inclined pipe jacking surface 572. The lower part of the pipe outlet jacking rod 57 is connected to the pipe jacking drive element 59 through a transmission mechanism 58. The pipe jacking drive element 59 drives the pipe outlet jacking rod 57 to move up and down through the transmission mechanism 58. When lowered, the pipe jacking head 571 is completely positioned within the pipe outlet support arm 52. Below the slot 521, the steel pipe can move above the jacking head 571 along with the pipe outlet support arm 52. Then, the jacking drive element 59 drives the pipe outlet jacking rod 57 to rise through the transmission mechanism 58. During the process, the jacking slope 572 of the jacking head 571 supports the steel pipe and drives it to rise along the column of the pipe outlet frame 51. The steel pipe leaves the pipe outlet support arm 52. When the pipe outlet jacking rod 57 rises to the highest point, the jacking slope 572 is connected to the top of the slope of the pipe outlet frame 51. Under the influence of gravity, the steel pipe rolls from the jacking slope 572 onto the slope of the pipe outlet frame 51 and automatically rolls down to exit the pipe.

[0096] The pipe jacking drive element 59 is a horizontally mounted pneumatic or hydraulic cylinder, and the transmission mechanism 58 is a swing arm connecting rod. The extension and retraction of the piston rod of the pipe jacking drive element 59 drives the transmission mechanism 58 to swing, thereby driving the pipe jacking rod 57 to move up and down. Of course, the pipe jacking drive element 59 can also be directly mounted vertically, with the piston rod directly driving the pipe jacking rod 57 to move up and down.

[0097] Like the inlet pipe machine 2, when the pipe outlet machine 5 is designed with a swing arm connecting rod transmission mechanism 28 and transmission mechanism 58, the shafts of the swing arms can be connected together, so that several pipe outlet push rods 57 are driven by a single pipe push drive element 59 to achieve synchronous movement.

[0098] The pipe-out driving element 53 of the pipe-out machine 5 works in conjunction with the pipe-jacking driving element 59 to move intermittently until all the steel pipes on the pipe-out support arm 52 are transferred to the pipe-out rack 51, thus achieving the complete output of the tested steel pipes.

[0099] This utility model of a fully automatic steel pipe airtightness testing machine improves the structure of the equipment to meet the airtightness testing requirements of long steel pipes. By connecting the connecting shafts 24 and 54, the pressure rod operating rod 37, and the connecting shafts between the swing arm shafts of the transmission mechanism 28 and 58, the various mechanisms that need to move synchronously are connected in series. This reduces the number of driving components and improves the synchronous movement of the mechanisms, ensuring that the entire long steel pipe can reliably enter, fix, test, and exit the pipe during the testing process, and avoiding bending and deformation of the steel pipe.

[0100] In the design, since the inlet pipe support arm 22, the support plate 33, and the outlet pipe support arm 52 need to transfer the steel pipe above the water tank 1, in order to avoid collisions, the positions of each inlet pipe support arm 22, the support plate 33, and the outlet pipe support arm 52 in the X-axis direction are staggered.

[0101] The preferred embodiments of this utility model have been described in detail above, but this utility model is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A fully automatic steel pipe airtightness testing machine, characterized in that, Includes water tank, inlet pipe machine, elevator, airtight machine, and outlet pipe machine; The water tank is located in the middle, and the inlet pipe machine and outlet pipe machine are located on both sides of the water tank, respectively. The elevator is installed at the water tank; the elevator frame is installed within the water tank area; the elevator drive element is installed outside the water tank, and the elevator drive element drives the elevator frame to move up and down within the water tank. Airtight seals are installed at both ends of the lifting frame of the elevator; The pipe feeder includes a pipe rack, a pipe feed support arm, and a pipe feed drive element; the pipe rack is located at the top and is equipped with a pipe feed ramp; A pipe inlet support arm is connected to the lower side of the pipe dropper of the storage rack. The pipe inlet support arm is horizontally set above the pipe inlet machine. Several interval slots are provided on the inner side of the pipe inlet support arm along the Y-axis. The pipe inlet support arm is connected to the pipe inlet drive element. The interval slot part of the pipe inlet support arm can move inward to the top of the water tank. The tube outlet machine includes a tube outlet support, a tube outlet arm, and a tube outlet drive element; The pipe outlet support arm is horizontally set at the top of the pipe outlet machine. The inner side of the pipe outlet support arm is provided with several interval slots along the Y-axis. The pipe outlet support arm is connected to the pipe outlet drive element. The interval slot part of the pipe outlet support arm can move inward to the top of the water tank. The pipe outlet frame is located above the pipe outlet support arm and is a slope that slopes outward and downward from the side of the pool. A pipe outlet lifting device is provided at the front of the pipe outlet frame, which lifts the steel pipe located in the interval groove of the pipe outlet support arm to the end of the pipe outlet frame. The elevator is equipped with several driving elements, which are vertically arranged cylinders or hydraulic cylinders. The top of the piston rod output from the cylinder is connected to the lifting frame through a connecting arm. The lifting frame is provided with several support plates at intervals along the X-axis, and several pipe grooves are opened on the upper part of the support plates along the Y-axis. The airtight machine is located at both ends of the lifting frame and consists of several pipe end plugs and several parallel clamping drive elements connected to them; the pipe end plugs are connected to an external high-pressure air source through air pipes. The spacing between the slots on the inlet pipe support arm, the spacing between the slots on the outlet pipe support arm, the spacing between the pipe slots on the lifting frame support plate, and the spacing between the pipe end plugs of the airtight machine are all equal and correspond one-to-one. The projections of the inlet pipe support arm and the lifting frame's support plate on the X-axis intersect; the projections of the outlet pipe support arm and the lifting frame's support plate on the X-axis also intersect. The X-axis represents the length of the steel pipe to be inspected, and the Y-axis represents the arrangement of the pipe inlet machine, water tank, and pipe outlet machine.

2. The fully automatic steel pipe airtightness testing machine as described in claim 1, characterized in that, The pipe storage rack of the pipe feeder consists of several racks spaced apart along the X-axis. The lower part of the inlet support arm is equipped with a rack mechanism. A drive gear is installed on the inlet machine. The rotation shaft of the drive gear is connected to the output shaft of the inlet drive element. The drive gear meshes with the rack mechanism. The tube outlet frame of the tube outlet machine consists of several frames spaced apart along the X-axis. The lower part of the tube outlet support arm is equipped with a rack mechanism, and a drive gear is installed on the tube outlet machine. The rotation shaft of the drive gear is connected to the output shaft of the tube outlet drive element, and the drive gear meshes with the rack mechanism.

3. The fully automatic steel pipe airtightness testing machine as described in claim 2, characterized in that, Several tube feeding mechanisms consisting of tube feeding arms and drive gears are provided at intervals along the X-axis of the tube feeding machine. The drive shafts of several tube inlet mechanisms are connected in series via connecting shafts to form a tube inlet mechanism group, which is connected to a tube inlet drive element; The pipe feeding machine is equipped with one or more pipe feeding mechanism groups along the X-axis direction; the pipe feeding drive elements between the pipe feeding mechanism groups move synchronously; Several tube-out mechanisms consisting of tube-out support arms and drive gears are provided at intervals along the X-axis of the tube-out machine. The drive shafts of several tube outlet mechanisms are connected in series via connecting shafts to form a tube outlet mechanism group, which is connected to a tube outlet drive element. The tube outlet machine is equipped with one or more tube outlet mechanism groups along the X-axis direction; the tube outlet drive elements between the tube outlet mechanism groups move synchronously.

4. The fully automatic steel pipe airtightness testing machine as described in claim 2, characterized in that, A pipe-blocking mechanism is installed inside the pipe inlet machine; The pipe-blocking mechanism includes a pipe-blocking rod, which is vertically arranged; A pipe-stopping head is installed at the top of the pipe-stopping rod, and the lower part of the pipe-stopping rod is connected to the pipe-stopping drive element through a transmission mechanism or directly. The pipe-stopping drive element drives the pipe-stopping rod to move up and down, causing the pipe-stopping head to rise and protrude out of the storage pipe slope, or causing the pipe-stopping head to fall down and land below the storage pipe slope.

5. The fully automatic steel pipe airtightness testing machine as described in claim 2, characterized in that, The pipe lifting device includes a pipe lifting rod and a pipe driving element; The pipe jacking rod is set vertically, and a jacking head is installed on the top of the pipe jacking rod. The top of the jacking head is provided with an outwardly inclined jacking slope. The lower part of the pipe jacking rod is connected to the pipe jacking drive element either through a transmission mechanism or directly. The jacking drive element drives the pipe jacking rod to move up and down. When it is lowered, the jacking head is completely below the slot of the pipe jacking support arm. The jacking drive element drives the pipe jacking rod to rise. During the process, the jacking slope of the jacking head supports the steel pipe and moves it up along the column of the pipe jacking frame until the jacking slope connects with the top of the slope of the pipe jacking frame.

6. The fully automatic steel pipe airtightness testing machine as described in claim 4 or 5, characterized in that, The lower part of the stop rod is connected to the stop drive element via a swing arm connecting rod; The lower part of the pipe jacking rod is connected to the pipe jacking drive element through a swing arm connecting rod; Several swing arm links are arranged side by side along the X-axis, and the pivots of the swing arm links are connected together by a connecting shaft.

7. The fully automatic steel pipe airtightness testing machine as described in claim 1, characterized in that, The lifting frame is equipped with pressure bar mechanisms at intervals; The lever mechanism includes a lever drive element, a lever operating rod, and several levers; The pressure rod drive element is a cylinder or hydraulic cylinder set on one side of the lifting frame along the X-axis. The piston rod output from the cylinder is connected to a pressure rod operating rod set along the X-axis. The pressure rod operating rod is connected to the pressure rod one by one through several swing arms. The pressure bar and the swing arm are positioned between two adjacent support plates; The pressure rod drive element drives the pressure rod operating rod to extend and retract along the X-axis, which in turn drives the swing arm to swing. The swing arm drives the pressure rod located above it to swing through the swing arm shaft. When the pressure rod swings outward, it touches the side wall of the pool. When the pressure rod swings inward, it presses against the top of the steel pipe located on the support plate.

8. The fully automatic steel pipe airtightness testing machine as described in claim 7, characterized in that, The drive element of the elevator is provided with an intermediate height pause position; when the piston of the drive element of the elevator is in the intermediate height pause position, the top of the pressure rod and the swing arm shaft is lower than the bottom of the gap groove of the inlet pipe support arm and the outlet pipe support arm.

9. The fully automatic steel pipe airtightness testing machine as described in claim 7, characterized in that, The pressure bar is movably connected to the swing arm shaft, and the height of the pressure bar on the swing arm shaft is adjustable.

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