A straight seam welded pipe inner weld reinforcement grinding machine

Abstract

The present application relates to the technical field of straight seam welded pipe inner weld grinding, and particularly relates to a straight seam welded pipe inner weld excess height grinding machine, which comprises a support guide block, the surface of the support guide block is fixedly connected with guide block fixing parts, the guide block fixing parts are provided with three and are equidistantly distributed, the top of the guide block fixing parts is fixedly connected with a support air cylinder, and the top of the support air cylinder is fixedly connected with a crawling guide wheel; the crawling support mechanism and the pipe inner weld grinding mechanism are arranged, so that the operation risk of personnel in the narrow and closed pipe is avoided, the sand wheel sand blasting mechanism is arranged, the grinding efficiency is significantly improved, the continuity and stability of the automatic grinding operation are ensured, the depth limiting mechanism is arranged, the weld excess height is effectively prevented from being too low and the pipe base material is effectively prevented from being damaged due to excessive grinding feeding, the sand wheel stabilizing mechanism is arranged, the grinding precision and the surface quality are further improved, and the anti-splashing mechanism is arranged to prevent the waste splashing from scratching the inner wall base material of the straight seam welded pipe.

Description

Technical Field

[0001] This invention relates to the technical field of internal weld seam grinding in straight seam welded pipes, and particularly to a grinding machine for the excess height of internal weld seams in straight seam welded pipes. Background Technology

[0002] As a key pipe material for oil and natural gas transportation and urban pipeline construction, the weld quality of straight seam welded pipes directly affects the safe operation and service life of pipelines. Currently, the grinding of the weld reinforcement in straight seam welded pipes mainly relies on manual operation of tools such as handheld angle grinders. However, the working environment is harsh and the labor intensity is extremely high. The space inside the pipe is narrow and confined, which not only restricts the operation of workers, but also requires them to endure the noise and dust generated by grinding. Manual grinding relies entirely on operating experience, which is not only inefficient and difficult to match the production line rhythm, but also makes it difficult to accurately control the weld reinforcement and the smoothness of the transition zone by relying on experience. This often leads to insufficient grinding requiring rework, or excessive grinding damaging the base material.

[0003] Patent publication number CN105290907B discloses a grinding machine for the inner weld seam of straight seam welded pipes, with main classification number B24B. This invention describes a grinding machine for the inner weld seam of straight seam welded pipes that can stably, reliably, and automatically grind the entire length or parts of the inner weld seam of steel pipes, reducing the labor intensity of workers and improving work efficiency. Furthermore, the grinding machine has a simple overall structure, a convenient and easy-to-operate adjustment method, and the grinding components involved are not easily damaged, resulting in low maintenance costs.

[0004] During prolonged grinding, the abrasive grains on the surface of the Yugao grinding wheel gradually become dull, resulting in a significant reduction in grinding efficiency. The equipment requires manual replacement or dressing of the grinding wheel, which not only disrupts the continuity of automated operation but also adds extra auxiliary time. Furthermore, under the condition of high-speed rotation and radial grinding force, the grinding wheel is prone to high-frequency small-amplitude vibration, resulting in wavy tool marks on the grinding surface and an uneven weld transition area, which reduces the surface quality after dressing. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] In view of the problems existing in the current straight seam weld seam excess height grinding machine, the present invention is proposed.

[0007] Therefore, the purpose of this invention is to provide a grinding machine for the excess height of the inner weld seam of a straight seam welded pipe, the purpose of which is to: triangular positioning, grinding powder spraying, prevention of over-grinding, auxiliary stabilization of the grinding wheel, and prevention of splashing.

[0008] To solve the above technical problems, the present invention provides the following technical solution: a crawling support mechanism, which includes a support guide block, a guide block fixing member fixedly connected to the surface of the support guide block, three guide block fixing members being provided and evenly distributed, a support cylinder fixedly connected to the top of the guide block fixing member, and a crawling guide wheel fixedly connected to the top of the support cylinder;

[0009] The pipe internal weld grinding mechanism is mounted on the crawling support mechanism. The pipe internal weld grinding mechanism can grind and trim the weld excess height on the inner wall of the straight seam welded pipe to remove the weld excess height.

[0010] A sandblasting mechanism is installed inside the weld grinding mechanism inside the pipe. The sandblasting mechanism can intermittently sandblast the surface of the grinding wheel, thereby improving the grinding efficiency and extending the service life of the grinding wheel.

[0011] A depth limiting mechanism is installed on the pipe weld grinding mechanism. The depth limiting mechanism can limit the grinding depth of the grinding wheel by contacting the inner wall of the straight seam welded pipe, so as to prevent the weld reinforcement from being too low and damage to the pipe base material due to excessive grinding.

[0012] A grinding wheel stabilizing mechanism is installed inside a depth limiting mechanism. The grinding wheel stabilizing mechanism can be triggered when the depth limiting mechanism contacts the inner wall of the straight seam welded pipe to provide lateral auxiliary support for the grinding wheel, reduce the vibration of the grinding wheel during the grinding process, and further improve the grinding accuracy.

[0013] An anti-splash mechanism is installed inside a depth limiting mechanism. The anti-splash mechanism can be deployed when the depth limiting mechanism contacts the inner wall of the straight seam welded pipe to shield the splashes generated during grinding, prevent waste debris from splashing and scratching the inner wall of the straight seam welded pipe, and further protect the pipe base material.

[0014] As a preferred embodiment of the straight seam welded pipe internal weld height grinding machine of the present invention, the internal weld grinding mechanism includes a steering adjustment wheel, which is fixed to the front end of the support guide block by a servo motor. Support rod seats are fixedly connected to the top and bottom of the steering adjustment wheel. A grinding support rod is fixedly connected to the right side of the support rod seat. A grinding adjustment block is movably connected to the top of the grinding support rod via a rotating shaft. Side plates are fixedly connected to the front and back ends of the right side of the grinding adjustment block. An internal weld height grinding wheel is provided on the inner side of the side plate via a small motor. A synchronous cylinder is movably connected to the left side of the front end of the grinding adjustment block via a rotating shaft. The end of the synchronous cylinder away from the grinding adjustment block is movably connected to the front end of the support rod seat via a rotating shaft. The synchronous cylinder and the support cylinder are used in conjunction.

[0015] In a preferred embodiment of the straight seam welded pipe inner weld height grinding machine of the present invention, the grinding wheel sandblasting mechanism includes a rotary guide fixing ring. Two rotary guide fixing rings are provided and respectively fixed to the front and back ends of the height grinding grinding wheel. A toothed ring is fixedly connected to the front end of the rotary guide fixing ring. The front end of the toothed ring has a toothed groove. A transmission gear is movably connected to the back end of the side plate, corresponding to the position of the toothed ring, via a rotating shaft. The back end of the transmission gear and the front end of the toothed ring are meshed through the toothed groove. A transmission rod is fixedly connected to the left side of the transmission gear. The front end of the grinding adjustment block... Both the back and the front end are fixedly connected to a sandblasting part fixing plate. A sandblasting can is fixedly connected to the bottom of the back end of the sandblasting part fixing plate. A sandblasting pipe is fixedly connected to the back end of the sandblasting can. A sandblasting nozzle is fixedly connected to the end of the sandblasting pipe away from the sandblasting can. The front end of the sandblasting nozzle is fixedly connected to the front end of the inner wall of the grinding adjustment block. A sandblasting adjustment port is movably connected to the right side of the sandblasting nozzle through a rotating shaft. The sandblasting adjustment port and the transmission rod are connected through a transmission belt. An adjustment port fixing ring is movably connected to the surface of the sandblasting adjustment port through a rotating shaft. The front end of the adjustment port fixing ring is fixedly connected to the front end of the inner wall of the grinding adjustment block.

[0016] As a preferred embodiment of the straight seam welded pipe inner weld height grinding machine of the present invention, wherein: the depth limiting mechanism includes a meshing transmission assembly, the meshing transmission assembly is disposed at the front end of the grinding adjustment block, the top of the grinding adjustment block is provided with a straight seam pipe inner wall contact plate, the bottom of the straight seam pipe inner wall contact plate is fixedly connected with a telescopic rod, and the telescopic rod is fixedly connected to the meshing transmission assembly.

[0017] In a preferred embodiment of the straight seam welded pipe inner weld height grinding machine of the present invention, the grinding wheel stabilizing mechanism includes an inner sliding rod, two inner sliding rods are provided and both are slidably connected to the inner cavity of the inner wall contact plate of the straight seam pipe, the bottom of the inner sliding rod penetrates the bottom of the inner wall contact plate of the straight seam pipe, a grinding wheel auxiliary stabilizing plate is provided at the bottom of the inner sliding rod, a straight seam pipe inner wall trigger rod is fixedly connected to the top of the inner sliding rod, the top of the straight seam pipe inner wall trigger rod penetrates the top of the inner wall contact plate of the straight seam pipe, a spring is movably sleeved on the surface of the inner sliding rod, the top and bottom of the spring are fixedly connected to the bottom of the inner wall trigger rod of the straight seam pipe and the bottom of the inner wall of the inner wall contact plate of the straight seam pipe.

[0018] As a preferred embodiment of the straight seam welded pipe inner weld height grinding machine of the present invention, the anti-splash mechanism includes an anti-splash extension plate, which is disposed in the inner cavity of the contact plate of the inner wall of the straight seam pipe. The front end and the back end of the anti-splash extension plate are movably connected to a sliding control rod through a rotating shaft. The end of the sliding control rod away from the anti-splash extension plate is movably connected to the front end of the trigger rod of the inner wall of the straight seam pipe through a rotating shaft.

[0019] As a preferred embodiment of the straight seam welded pipe inner weld height grinding machine of the present invention, wherein: the top and bottom of the anti-splash extension plate are slidably connected to the top and bottom of the inner wall of the straight seam pipe inner wall contact plate, the right side of the anti-splash extension plate penetrates the right side of the straight seam pipe inner wall contact plate, and the surface of the anti-splash extension plate is provided with an anti-corrosion coating.

[0020] In a preferred embodiment of the straight seam welded pipe inner weld height grinding machine of the present invention, the meshing transmission assembly includes an adjusting block synchronous gear, the back end of the adjusting block synchronous gear and the front end of the grinding adjusting block are fixedly connected, the front end of the grinding support rod is fixedly connected to a secondary gear fixing plate, the top of the back end of the secondary gear fixing plate is movably connected to a secondary gear through a rotating shaft, the right side of the secondary gear and the left side of the adjusting block synchronous gear are meshed, the left side of the secondary gear fixing plate is fixedly connected to an inner sliding groove plate, and the back end of the inner sliding groove plate is slidably connected to a synchronous toothed plate.

[0021] In a preferred embodiment of the straight seam welded pipe inner weld height grinding machine of the present invention, the left side of the synchronous gear plate and the top of the right side of the telescopic rod are fixedly connected, and the left side of the auxiliary gear fixing plate and the bottom of the right side of the telescopic rod are fixedly connected.

[0022] As a preferred embodiment of the straight seam welded pipe inner weld height grinding machine of the present invention, wherein: the grinding wheel auxiliary stabilizing plate is an L-shaped folded plate, and the grinding wheel auxiliary stabilizing plate and the inner sliding rod are fixedly connected.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. This invention, by setting up a crawling support mechanism and an in-pipe weld grinding mechanism, uses three sets of equally spaced support cylinders in conjunction with crawling guide wheels to achieve stable three-point support positioning inside the straight seam welded pipe and autonomously move along the inner wall of the pipe. At the same time, the in-pipe weld grinding mechanism adjusts the grinding direction through steering adjustment wheels and uses synchronous cylinders in conjunction with support cylinders to achieve grinding feed. It can automatically grind the weld excess height on the inner wall of the straight seam welded pipe without manual hand operation, which greatly reduces the labor intensity of operators, avoids the risk of personnel working in narrow and closed pipes, significantly improves grinding efficiency, and ensures that the grinding angle is flexible and adjustable, so as to adapt to the grinding needs of different pipe diameters and weld positions.

[0025] 2. This invention utilizes a grinding wheel sandblasting mechanism. The rotation of the grinding wheel itself drives the gear ring to rotate, which in turn drives the sandblasting adjustment port through the transmission rod and belt to achieve intermittent sandblasting. If sandblasting is continuous, after the sandblasting time exceeds the saturation time, not only will the efficiency improvement be insignificant, but it will also increase the damage to the grinding wheel and workpiece, and cause resource waste. Intermittent sandblasting not only achieves online sharpening of the grinding wheel surface and effectively removes the metal chips clogging the grinding wheel surface, keeping the grinding wheel in a sharp grinding state at all times, significantly improving grinding efficiency, but also extends the service life of the grinding wheel, reduces the frequency of downtime for grinding wheel replacement, and ensures the continuity and stability of automated grinding operations.

[0026] 3. This invention, by setting a depth limiting mechanism, allows the grinding adjustment block to rotate under the drive of a synchronous cylinder, which in turn drives the synchronous gear of the adjustment block to rotate. Through the meshing transmission of the secondary gear, the synchronous tooth plate in the inner sliding groove plate slides, thereby pushing the telescopic rod to lift the inner wall contact plate of the straight seam pipe upward until it is in close contact with the inner wall of the straight seam welded pipe. The rigid contact of the inner wall contact plate of the straight seam pipe forms a physical hard limit. When the grinding wheel grinds to the preset depth, the contact force between the inner wall contact plate of the straight seam pipe and the inner wall of the pipe prevents the grinding adjustment block from pressing down further, thereby locking the grinding depth. This effectively prevents the weld reinforcement height from being too low and the pipe base material from being damaged due to excessive grinding feed, ensuring the consistency of the weld reinforcement height and the structural strength of the pipe after grinding.

[0027] 4. By setting up a grinding wheel stabilizing mechanism, when the inner wall contact plate of the straight seam pipe rises to contact the inner wall of the pipe under the action of the depth limiting mechanism, the inner wall trigger rod of the straight seam pipe is squeezed by the reaction force of the inner wall of the pipe and slides down along the inner slide rod of the plate, which drives the grinding wheel auxiliary stabilizing plate to move down synchronously and extend to the side of the grinding wheel for high-level grinding. Through the auxiliary support of the L-shaped folding plate, the grinding wheel is physically constrained and supported laterally, which effectively increases the lateral stiffness of the grinding wheel when it rotates at high speed and significantly reduces the high-frequency vibration of the grinding wheel caused by the radial grinding force, making the weld area smoother and flatter, and further improving the grinding accuracy and surface quality.

[0028] 5. This invention, by setting up an anti-splash mechanism, when the inner wall contact plate of the straight seam pipe rises to make tight contact with the inner wall of the pipe, the inner wall trigger rod of the straight seam pipe slides downward under the reaction force of the inner wall of the pipe. Through the sliding control rod, the anti-splash extension plate is pushed to slide and extend to the right along the inner cavity of the inner wall contact plate of the straight seam pipe, forming a physical shielding barrier on both sides of the grinding area of ​​the high-speed grinding wheel. This effectively intercepts and blocks the high-speed splashing waste generated during grinding, preventing the waste from splashing and scratching the inner wall base material of the straight seam welded pipe. At the same time, the anti-corrosion coating on the surface of the anti-splash extension plate ensures its corrosion resistance and long-term reliability in the grinding environment. Thus, while achieving efficient grinding, it effectively protects the integrity of the pipe base material, comprehensively improving the processing quality and equipment life of the grinding machine. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0031] Figure 2 This is a three-dimensional structural diagram of the crawling guide wheel provided by the present invention.

[0032] Figure 3 This is a three-dimensional structural diagram of the meshing transmission assembly provided by the present invention.

[0033] Figure 4 This is a three-dimensional structural diagram of the grinding adjustment block provided by the present invention.

[0034] Figure 5 This is a three-dimensional structural diagram of the toothed ring provided by the present invention.

[0035] Figure 6 This is a three-dimensional structural diagram of the sandblasting tank provided by the present invention.

[0036] Figure 7 This is a three-dimensional structural diagram of the adjusting block synchronous gear provided by the present invention.

[0037] Figure 8 A three-dimensional structural diagram of the telescopic rod provided by the present invention.

[0038] Figure 9 This is a three-dimensional structural diagram of the grinding wheel auxiliary stabilizing plate provided by the present invention.

[0039] Figure label:

[0040] 100. Crawling support mechanism; 101. Support guide block; 102. Guide block fixing component; 103. Support cylinder; 104. Crawling guide wheel; 200. Inner pipe weld grinding mechanism; 201. Steering adjustment wheel; 202. Support rod seat; 203. Grinding support rod; 204. Grinding adjustment block; 205. Side plate; 206. Excess height grinding wheel; 207. Synchronous cylinder; 300. Grinding wheel sandblasting mechanism; 301. Rotary guide fixing ring; 302. Gear ring; 303. Gear groove; 304. Transmission gear; 305. Transmission rod; 306. Sandblasting part fixing plate; 307. Sandblasting can; 308. Sandblasting pipe; 309. 310. Sandblasting nozzle; 311. Sandblasting adjustment port; 400. Adjustment port fixing ring; 401. Depth limiting mechanism; 402. Meshing transmission assembly; 401-1. Adjusting block synchronous gear; 401-2. Secondary gear fixing plate; 401-3. Secondary gear; 401-4. Inner sliding groove plate; 401-5. Synchronous gear plate; 402. Straight seam pipe inner wall contact plate; 403. Telescopic rod; 500. Grinding wheel stabilizing mechanism; 501. Plate inner sliding rod; 502. Grinding wheel auxiliary stabilizing plate; 503. Straight seam pipe inner wall trigger rod; 504. Spring; 600. Anti-splash mechanism; 601. Anti-splash extension plate; 602. Sliding control rod. Detailed Implementation

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0043] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0044] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0045] Example 1

[0046] The crawling support mechanism 100 includes a support guide block 101, a guide block fixing member 102 fixedly connected to the surface of the support guide block 101, three guide block fixing members 102 are provided and evenly distributed, a support cylinder 103 is fixedly connected to the top of the guide block fixing member 102, and a crawling guide wheel 104 is fixedly connected to the top of the support cylinder 103.

[0047] One embodiment of this example is as follows: The pipe weld grinding mechanism 200 includes a steering adjustment wheel 201, which is fixed to the front end of the support guide block 101 by a servo motor. The top and bottom of the steering adjustment wheel 201 are fixedly connected to support rod seats 202. The right side of the support rod seat 202 is fixedly connected to a grinding support rod 203. The top of the grinding support rod 203 is movably connected to a grinding adjustment block 204 via a rotating shaft. The front and back ends of the right side of the grinding adjustment block 204 are fixedly connected to side plates 205. The inner side of the side plate 205 is provided with a high-extension grinding wheel 206 via a small motor. The left side of the front end of the grinding adjustment block 204 is movably connected to a synchronous cylinder 207 via a rotating shaft. The end of the synchronous cylinder 207 away from the grinding adjustment block 204 is movably connected to the front end of the support rod seat 202 via a rotating shaft. The synchronous cylinder 207 and the support cylinder 103 are used in cooperation.

[0048] The abrasive wheel blasting mechanism 300 includes two rotary guide rings 301, which are respectively fixed to the front and back ends of the grinding wheel 206. A gear ring 302 is fixedly connected to the front end of each rotary guide ring 301. The front end of the gear ring 302 has a toothed groove 303. A transmission gear 304 is movably connected to the back end of the side plate 205, corresponding to the position of the gear ring 302, via a rotating shaft. The back end of the transmission gear 304 and the front end of the gear ring 302 are meshed through the toothed groove 303. A transmission rod 305 is fixedly connected to the left side of the transmission gear 304. A blasting component fixing plate 30 is fixedly connected to both the front and back ends of the grinding adjustment block 204. 6. A sandblasting can 307 is fixedly connected to the bottom of the back end of the sandblasting part fixing plate 306. A sandblasting pipe 308 is fixedly connected to the back end of the sandblasting can 307. A sandblasting nozzle 309 is fixedly connected to the end of the sandblasting pipe 308 away from the sandblasting can 307. The front end of the sandblasting nozzle 309 is fixedly connected to the front end of the inner wall of the grinding adjustment block 204. A sandblasting adjustment port 310 is movably connected to the right side of the sandblasting nozzle 309 through a rotating shaft. The sandblasting adjustment port 310 and the transmission rod 305 are connected through a transmission belt. An adjustment port fixing ring 311 is movably connected to the surface of the sandblasting adjustment port 310 through a rotating shaft. The front end of the adjustment port fixing ring 311 is fixedly connected to the front end of the inner wall of the grinding adjustment block 204.

[0049] First, the crawling support mechanism 100 is placed inside the straight seam welded pipe. The support cylinder 103 is activated, and the piston rod of the support cylinder 103 extends and pushes the crawling guide wheel 104 to expand outward. This allows the three crawling guide wheels 104 to simultaneously press against the inner wall of the straight seam welded pipe in an equally angularly distributed manner, achieving three-point self-adaptive centering and stable support for the entire grinding machine inside the pipe. The synchronous cylinder 207 used for support is adjusted synchronously accordingly. Then, the servo motor of the steering adjustment wheel 201 is activated, driving the steering adjustment wheel 201 to rotate to a preset angle. This causes the support rod seat 202, which is fixedly connected to the top and bottom of the steering adjustment wheel 201, to drive the grinding support rod 203 to deflect, thereby aligning the high-height grinding wheel 206 with the weld position on the inner wall of the straight seam welded pipe.

[0050] Once the high-relief grinding wheel 206 is aligned with the weld seam, the small motor inside the side plate 205 is started to drive the high-relief grinding wheel 206 to rotate at high speed. At the same time, the synchronous cylinder 207 is started, and the piston rod of the synchronous cylinder 207 extends to push the grinding adjustment block 204 to rotate downward around the connecting shaft with the grinding support rod 203. The grinding adjustment block 204 drives the side plate 205 and the high-relief grinding wheel 206 to press down synchronously, so that the high-relief grinding wheel 206 gradually approaches and contacts the weld seam excess on the inner wall of the straight seam welded pipe, and the grinding and finishing begins.

[0051] While the high-speed grinding wheel 206 is rotating and grinding, the grinding wheel sandblasting mechanism 300 starts working simultaneously. When the high-speed grinding wheel 206 rotates, it drives the rotating guide ring 301, which is fixedly connected to its front and back ends, to rotate synchronously. The rotating guide ring 301 further drives the gear ring 302, which is fixedly connected to its front end, to rotate. The front end face of the gear ring 302 has a toothed groove 303, which meshes with the teeth of the transmission gear 304. As the gear ring 302 rotates continuously, it drives the transmission gear 304 to rotate around its own axis. A transmission rod 305 is fixedly connected to the left side of the transmission gear 304. The rotating rod 305 pulls the sandblasting adjustment port 310 around the connecting shaft with the sandblasting port 309 via the transmission belt. Since the nozzle of the sandblasting adjustment port 310 is misaligned with the sandblasting port 309, it will continuously connect and disconnect during the rotation to form intermittent sandblasting. The surface of the sandblasting adjustment port 310 is movably connected to the adjustment port fixing ring 311 through the rotating shaft. The front end of the adjustment port fixing ring 311 is fixedly connected to the front end of the inner wall of the grinding adjustment block 204, so that the sandblasting adjustment port 310 is always constrained by the adjustment port fixing ring 311 during the rotation, ensuring the stability and accuracy of its rotation trajectory.

[0052] The front end of the sandblasting nozzle 309 is fixedly connected to the front end of the inner wall of the grinding adjustment block 204. The sandblasting adjustment port 310 rotates periodically relative to the sandblasting nozzle 309 under the pull of the transmission rod 305, causing a periodic opening and closing change between the outlet end face of the sandblasting adjustment port 310 and the outlet end face of the sandblasting nozzle 309. When the sandblasting adjustment port 310 rotates to the position aligned with the outlet of the sandblasting nozzle 309, the sandblasting channel is fully opened. The compressed gas inside the sandblasting tank 307 located on the sandblasting component fixing plate 306 carries the sand material through the sandblasting pipe 3... After being conveyed to the sandblasting nozzle 309, the material passes through the sandblasting adjustment port 310 and is sprayed onto the surface of the high-speed grinding wheel 206 to sandblast and sharpen the high-speed grinding wheel 206. During this process, each intermittent sandblasting sprays high-speed abrasive particles onto the surface of the high-speed grinding wheel 206. The high-speed abrasive particles impact the surface of the high-speed grinding wheel 206, restoring its grinding accuracy. At the same time, it avoids the disadvantages of continuous sandblasting. After sandblasting exceeds the saturation time, not only is the efficiency improvement not obvious, but it also increases the damage to the grinding wheel workpiece and causes a waste of resources.

[0053] By setting up the pipe weld grinding mechanism 200 and the grinding wheel sandblasting mechanism 300, the high-speed grinding wheel 206 can achieve online, intermittent automatic sharpening without stopping the machine during the grinding process, so that the grinding wheel always maintains the best grinding condition, which greatly improves the grinding efficiency and grinding quality. At the same time, it solves the problems in the existing technology that the grinding efficiency is reduced due to abrasive grain passivation and surface blockage during long-term grinding, the need for frequent machine stops to manually replace or dress the grinding wheel, and the inability to meet the needs of automated continuous operation.

[0054] Example 2

[0055] Based on Embodiment 1, this embodiment considers that during the actual grinding process, the grinding adjustment block 204, driven by the synchronous cylinder 207, continuously presses down the excess weld height grinding wheel 206. Because the excess weld height is uneven along the pipe length and the steel pipe itself may have ellipticity deviations, the actual grinding depth of the excess weld height grinding wheel 206 is difficult to accurately determine. When the excess weld height is locally low or the pipe diameter is locally small, if the grinding adjustment block 204 continues to feed at the same downward angle, the excess weld height grinding wheel 206 is very likely to exceed the actual thickness of the excess weld height. This results in an excessively low weld reinforcement after grinding, weakening the effective load-bearing section of the weld and even directly damaging the pipe base material, causing the steel pipe to be scrapped. Therefore, in this embodiment, a depth limiting mechanism 400 is set. The depth limiting mechanism 400 includes a meshing transmission component 401. The meshing transmission component 401 is set at the front end of the grinding adjustment block 204. A straight seam pipe inner wall contact plate 402 is set at the top of the grinding adjustment block 204. A telescopic rod 403 is fixedly connected to the bottom of the straight seam pipe inner wall contact plate 402. The telescopic rod 403 and the meshing transmission component 401 are fixedly connected.

[0056] The meshing transmission assembly 401 includes an adjusting block synchronous gear 401-1, which is fixedly connected to the back end of the adjusting block synchronous gear 401-1 and the front end of the grinding adjusting block 204. The front end of the grinding support rod 203 is fixedly connected to a secondary gear fixing plate 401-2. The top of the back end of the secondary gear fixing plate 401-2 is movably connected to a secondary gear 401-3 via a rotating shaft. The right side of the secondary gear 401-3 is meshing with the left side of the adjusting block synchronous gear 401-1. The left side of the secondary gear fixing plate 401-2 is fixedly connected to an inner sliding groove plate 401-4. The back end of the inner sliding groove plate 401-4 is slidably connected to a synchronous gear plate 401-5.

[0057] The left side of the synchronous gear plate 401-5 and the top right side of the telescopic rod 403 are fixedly connected, and the left side of the auxiliary gear fixing plate 401-2 and the bottom right side of the telescopic rod 403 are fixedly connected.

[0058] When the inner wall contact plate 402 of the straight seam pipe comes into tight contact with the inner wall of the straight seam welded pipe, the top surface of the inner wall contact plate 402 is subjected to a rigid reaction force from the inner wall of the pipe. This reaction force is transmitted to the synchronous gear plate 401-5 through the telescopic rod 403, preventing the synchronous gear plate 401-5 from continuing to slide upward. Since the sliding of the synchronous gear plate 401-5 is locked, the secondary gear 401-3 meshing with it stops rotating, and then prevents the synchronous gear 401-1 of the adjusting block from continuing to rotate through the meshing relationship. Finally, the further downward pressing action of the grinding adjusting block 204 is locked. At this time, the grinding depth of the residual height grinding wheel 206 is rigidly limited by the contact between the inner wall contact plate 402 of the straight seam pipe and the inner wall of the pipe. The residual height grinding wheel 206 cannot continue to feed downward, and its grinding depth is locked. By pre-adjusting the installation height of the inner wall contact plate 402 of the straight seam pipe or replacing the inner wall contact plate 402 of the straight seam pipe with a different thickness, the required grinding depth can be preset.

[0059] By setting a depth limiting mechanism 400, the grinding depth of the grinding wheel 206 is limited. The direct contact between the inner wall contact plate 402 and the inner wall of the straight seam welded pipe forms a hard limit, accurately locking the final pressing position of the grinding adjustment block 204. This controls the grinding depth within a preset safe range, effectively solving the problem of over-grinding caused by uneven weld height and pipe diameter deviation. It ensures that the weld height remains consistent after grinding, avoids damage to the pipe base material due to excessive grinding, and prevents the scrapping of the steel pipe. This significantly improves the consistency of grinding quality and the yield rate.

[0060] Example 3

[0061] Based on Embodiment 2, this embodiment considers that the depth limiting mechanism 400 in Embodiment 2 can achieve rigid limiting of the grinding depth of the high-height grinding wheel 206, effectively preventing excessive grinding and damage to the base material. However, the problem still exists: under high-speed rotation and radial grinding force, the high-height grinding wheel 206, due to its certain width, has relatively weak lateral rigidity and is prone to high-frequency vibration. This vibration not only forms wavy tool marks on the weld grinding surface, affecting the smoothness and surface quality of the weld transition zone, but also accelerates uneven wear of the grinding wheel, shortening its service life. At the same time, the impact force generated by the vibration will also affect the grinding adjustment block. 204. Fatigue damage caused by side plate 205 and related transmission components affects the reliability and grinding accuracy of the whole machine. Therefore, in this embodiment, a grinding wheel stabilizing mechanism 500 is provided. The grinding wheel stabilizing mechanism 500 includes an inner slide rod 501. There are two inner slide rods 501, and both are slidably connected to the inner cavity of the inner wall contact plate 402 of the straight seam pipe. The bottom of the inner slide rod 501 passes through the bottom of the inner wall contact plate 402 of the straight seam pipe. A grinding wheel auxiliary stabilizing plate 502 is provided at the bottom of the inner slide rod 501. The top of the inner slide rod 501 is fixedly connected to the inner wall trigger rod 503 of the straight seam pipe. The top of the inner wall trigger rod 503 of the straight seam pipe passes through the top of the inner wall contact plate 402 of the straight seam pipe.

[0062] A spring 504 is movably sleeved on the surface of the inner slide rod 501. The top and bottom of the spring 504 are fixedly connected to the bottom of the trigger rod 503 on the inner wall of the straight seam tube and the bottom of the inner wall of the contact plate 402 on the inner wall of the straight seam tube.

[0063] The grinding wheel auxiliary stabilizing plate 502 is an L-shaped folded plate, and the grinding wheel auxiliary stabilizing plate 502 and the inner sliding rod 501 are fixedly connected;

[0064] When the telescopic rod 403 of the depth limiting mechanism 400 pushes the inner wall contact plate 402 of the straight seam pipe upward, the inner wall contact plate 402 drives the internal sliding rod 501, the grinding wheel auxiliary stabilizing plate 502, and the inner wall trigger rod 503 of the straight seam pipe to rise synchronously. When the top surface of the inner wall contact plate 402 rises to contact the inner wall of the straight seam welded pipe, the top surface of the inner wall trigger rod 503 of the straight seam pipe first comes into close contact with the inner wall of the straight seam welded pipe before the top surface of the inner wall contact plate 402. As the inner wall contact plate 402 of the straight seam pipe continues to rise... Since the top surface of the inner wall trigger rod 503 of the straight seam pipe is blocked by the inner wall of the pipe and cannot continue to rise, while the inner wall contact plate 402 of the straight seam pipe still has the tendency to continue to rise, the inner wall trigger rod 503 of the straight seam pipe slides downward relative to the inner wall contact plate 402 of the straight seam pipe under the action of the spring 504. The inner sliding rod 501 of the plate generates a downward relative movement relative to the inner wall contact plate 402 of the straight seam pipe. That is, the bottom of the inner sliding rod 501 of the plate extends further downward to the bottom of the inner wall contact plate 402 of the straight seam pipe and forms a perfect fit with the grinding adjustment block 204 in the middle.

[0065] When the high-speed grinding wheel 206 is rotating and grinding, the side of the grinding adjustment block 204 comes into contact with the inner side of the L-shaped grinding wheel auxiliary stabilizing plate 502, thus forming a support, thereby restraining and suppressing the lateral swing of the high-speed grinding wheel 206.

[0066] By setting the grinding wheel stabilization mechanism 500, the lateral auxiliary support and vibration suppression functions of the high-speed grinding wheel 206 are realized, which significantly reduces the waviness and roughness of the grinding surface, makes the weld transition zone smoother and flatter, improves the grinding accuracy and surface quality, and at the same time reduces uneven wear and chipping of the grinding wheel by suppressing vibration, thus extending the service life of the grinding wheel.

[0067] Example 4

[0068] Based on Embodiment 2, this embodiment considers that the depth limiting mechanism 400 in Embodiment 2 can achieve rigid limiting of the grinding depth of the excess height grinding wheel 206, effectively preventing excessive grinding and damage to the base material. However, there is still a problem: during the high-speed rotation of the excess height grinding wheel 206 to grind the weld excess height, a large amount of high-temperature metal waste and grinding wheel debris will be generated. These wastes will be driven by the high-speed rotation of the grinding wheel and splash at a relatively fast initial velocity. The high-speed splashing metal waste will impact and scratch the inner wall surface of the base pipe on both sides of the weld at an inclined angle, forming scratches of varying depths. Therefore, this embodiment sets up an anti-splash mechanism 600. The anti-splash mechanism 600 includes an anti-splash extension plate 601. The anti-splash extension plate 601 is set in the inner cavity of the contact plate 402 on the inner wall of the straight seam pipe. The front end and the back end of the anti-splash extension plate 601 are movably connected to a sliding control rod 602 through a rotating shaft. The end of the sliding control rod 602 away from the anti-splash extension plate 601 is movably connected to the front end of the trigger rod 503 on the inner wall of the straight seam pipe through a rotating shaft.

[0069] The top and bottom of the anti-splash extension plate 601 are slidably connected to the top and bottom of the inner wall of the straight seam pipe inner wall contact plate 402. The right side of the anti-splash extension plate 601 extends through the right side of the straight seam pipe inner wall contact plate 402. The surface of the anti-splash extension plate 601 is provided with an anti-corrosion coating.

[0070] When the depth limiting mechanism 400 is working, the telescopic rod 403 pushes the inner wall contact plate 402 of the straight seam pipe to move upward. The inner wall contact plate 402 of the straight seam pipe drives the anti-splash extension plate 601, the sliding control rod 602 and the inner wall trigger rod 503 of the straight seam pipe to rise synchronously. When the top surface of the inner wall contact plate 402 of the straight seam pipe rises close to the inner wall of the straight seam welded pipe, the top surface of the inner wall trigger rod 503 of the straight seam pipe first comes into close contact with the inner wall of the straight seam welded pipe before the top surface of the inner wall contact plate 402 of the straight seam pipe. The inner wall trigger rod 503 of the straight seam pipe slides downward relative to the inner wall contact plate 402 under the action of the spring 504. The inner wall trigger rod 503 of the straight seam pipe changes position relative to the inner wall contact plate 402, which drives the sliding control rod 602 to rotate through the rotating shafts at both ends. At the same time, it triggers the anti-splash extension plate 601 to slide along the inner cavity of the inner wall contact plate 402 of the straight seam pipe.

[0071] Its right end extends to the position above the grinding area of ​​the high-pressure grinding wheel 206 near the weld, forming a shielding barrier in the spatter area of ​​the high-pressure grinding wheel 206, so that the spattered debris is intercepted and collected after hitting the lower surface of the anti-splash extension plate 601, and cannot reach the inner wall surface of the mother tube on both sides of the weld.

[0072] The anti-corrosion coating is to prevent the anti-splash extension plate 601 from being affected by surface rust or wear during long-term use, thus ensuring the long-term reliability and stability of the anti-splash extension plate 601 in harsh grinding environments.

[0073] By setting up an anti-splash mechanism 600, the function of blocking the splashing waste generated during the grinding process of the high-pressure grinding wheel 206 is realized. The anti-splash extension plate 601 automatically extends above the grinding area, forming a physical barrier by triggering the inner wall trigger rod 503 of the straight seam pipe under pressure from the inner wall, and then driving the sliding control rod 602 to intercept the splashing waste. This effectively prevents high-temperature metal waste from impacting and scratching the surface of the inner wall of the straight seam welded pipe at high speed, protecting the integrity and surface quality of the base material. Furthermore, the anti-corrosion coating on the surface of the anti-splash extension plate 601 effectively improves its corrosion resistance and wear resistance in harsh grinding environments, ensuring its flexibility and shielding effect during long-term use. This provides an effective guarantee for high-quality, high-yield automated high-pressure grinding operations on the inner wall of straight seam pipes.

[0074] Working principle: The crawling support mechanism 100 is inserted into the straight seam welded pipe to be repaired. The support cylinder 103 is activated, and its piston rod extends and pushes the crawling guide wheel 104 outward, so that the three crawling guide wheels 104 are simultaneously pressed against the inner wall of the straight seam welded pipe in an equally angular manner. This achieves three-point self-adaptive centering and stable support for the entire grinding machine within the pipe, ensuring that the axis of the grinding machine is basically coincident with the axis of the pipe. At the same time, the synchronous cylinder 207 used for grinding feed is adjusted synchronously with the support cylinder 103. Subsequently, the servo motor of the steering adjustment wheel 201 is activated, driving the steering adjustment wheel 201 to rotate to a preset angle. This causes the support rod seat 202, which is fixedly connected to the top and bottom of the steering adjustment wheel 201, to drive the grinding support rod 203 to deflect. This causes the excess height grinding wheel 206, located on the right side of the grinding adjustment block 204, to accurately align with the weld position on the inner wall of the straight seam welded pipe. Simultaneously, the small motor inside the side plate 205 is activated, driving the excess height grinding wheel 206 to rotate at high speed.

[0075] While the synchronous cylinder 207 drives the grinding adjustment block 204 to rotate, the adjustment block synchronous gear 401-1, which is fixedly connected to the front end of the grinding adjustment block 204, rotates synchronously with the grinding adjustment block 204. The rotation of the adjustment block synchronous gear 401-1 drives the secondary gear 401-3 to rotate through meshing transmission. The secondary gear 401-3 further drives the synchronous tooth plate 401-5, which meshes with it, to slide upward along the longitudinal groove of the inner sliding groove plate 401-4, while simultaneously driving the telescopic rod 403 and the inner wall contact plate 402 of the straight seam pipe to move upward.

[0076] When the inner wall contact plate 402 of the straight seam pipe is pressed against the inner wall of the straight seam welded pipe, its top surface is subjected to a rigid reaction force from the inner wall of the pipe. This reaction force is transmitted to the synchronous gear plate 401-5 through the telescopic rod 403, preventing it from sliding upward. Since the sliding of the synchronous gear plate 401-5 is locked, the secondary gear 401-3 meshing with it stops rotating, thereby preventing the synchronous gear 401-1 of the adjusting block from continuing to rotate, and finally rigidly locking the further downward pressing action of the grinding adjusting block 204.

[0077] After the inner wall contact plate 402 of the straight seam pipe is pressed against the inner wall of the straight seam welded pipe, the inner wall trigger rod 503 of the straight seam pipe slides downward relative to the inner wall contact plate 402 under the action of the spring 504. The inner wall trigger rod 503 of the straight seam pipe changes position relative to the inner wall contact plate 402, which drives the grinding wheel auxiliary stabilizing plate 502 fixedly connected to its bottom to move downward synchronously. This causes the L-shaped horizontal section of the grinding wheel auxiliary stabilizing plate 502 to gradually approach the side end face of the high-height grinding wheel 206, forming a perfect fit with the middle grinding adjustment block 204. This restrains and suppresses the lateral swing of the high-height grinding wheel 206, thus realizing the grinding wheel stabilization function.

[0078] The movement of the trigger rod 503 on the inner wall of the straight seam pipe simultaneously drives the sliding control rod 602 to rotate through the rotating shafts at both ends. At the same time, it triggers the anti-splash extension plate 601 to slide along the inner cavity of the contact plate 402 on the inner wall of the straight seam pipe. The right side of the anti-splash extension plate 601 passes through the right side of the contact plate 402 on the inner wall of the straight seam pipe and extends out. Its right end face extends to the position above the grinding area of ​​the high-height grinding wheel 206 near the weld. It forms a shielding barrier in the splash area of ​​the high-height grinding wheel 206. The splashed waste chips are intercepted after hitting the lower surface of the anti-splash extension plate 601 and cannot reach the inner wall surface of the mother pipe on both sides of the weld, effectively preventing the splashed waste chips from scratching the base material.

[0079] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible without substantially departing from the novelty and advantages of the subject matter described in this application. For example, variations in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​such as temperature, pressure, etc., installation arrangements, use of materials, color, orientation, etc. For instance, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise changed, and the nature or number or position of discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure performing the function described herein, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0080] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments may be omitted, i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention.

[0081] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A grinding machine for the inner weld height of a straight seam welded pipe, comprising a crawling support mechanism (100), which includes a support guide block (101), a guide block fixing member (102) fixedly connected to the surface of the support guide block (101), three guide block fixing members (102) being provided and evenly distributed, a support cylinder (103) fixedly connected to the top of the guide block fixing member (102), and a crawling guide wheel (104) fixedly connected to the top of the support cylinder (103); characterized in that: The pipe weld grinding mechanism (200) is mounted on the crawling support mechanism (100). The pipe weld grinding mechanism (200) can grind and repair the weld excess height on the inner wall of the straight seam welded pipe to remove the weld excess height. A sandblasting mechanism (300) is provided inside the pipe weld grinding mechanism (200). The sandblasting mechanism (300) can intermittently sandblast the surface of the grinding wheel to further improve the grinding efficiency and extend the service life of the grinding wheel. A depth limiting mechanism (400) is provided on the pipe weld grinding mechanism (200). The depth limiting mechanism (400) can limit the grinding depth of the grinding wheel by contacting the inner wall of the straight seam welded pipe, so as to prevent the weld reinforcement from being too low and the pipe base material from being damaged due to excessive grinding. A grinding wheel stabilizing mechanism (500) is provided inside a depth limiting mechanism (400). The grinding wheel stabilizing mechanism (500) can be triggered when the depth limiting mechanism (400) contacts the inner wall of the straight seam welded pipe to provide lateral auxiliary support for the grinding wheel, reduce the vibration of the grinding wheel during the grinding process, and further improve the grinding accuracy. Anti-splash mechanism (600) is provided inside depth limiting mechanism (400). The anti-splash mechanism (600) can be deployed when the depth limiting mechanism (400) contacts the inner wall of the straight seam welded pipe to shield the splashes generated during grinding, prevent waste chips from splashing and scratching the inner wall of the straight seam welded pipe, and further protect the pipe base material.

2. The straight seam welded pipe inner weld height grinding machine according to claim 1, characterized in that: The pipe weld grinding mechanism (200) includes a steering adjustment wheel (201), which is fixed to the front end of the support guide block (101) by a servo motor. Support rod seats (202) are fixedly connected to both the top and bottom of the steering adjustment wheel (201). A grinding support rod (203) is fixedly connected to the right side of the support rod seat (202). A grinding adjustment block (204) is movably connected to the top of the grinding support rod (203) via a rotating shaft. 204) The front and back ends of the right side are fixedly connected to a side plate (205). The inner side of the side plate (205) is equipped with a high-height grinding wheel (206) through a small motor. The left side of the front end of the grinding adjustment block (204) is movably connected to a synchronous cylinder (207) through a rotating shaft. The end of the synchronous cylinder (207) away from the grinding adjustment block (204) and the front end of the support rod seat (202) are movably connected through a rotating shaft. The synchronous cylinder (207) and the support cylinder (103) are used together.

3. A grinding machine for the inner weld height of a straight seam welded pipe according to claim 2, characterized in that: The abrasive wheel blasting mechanism (300) includes a rotary guide fixing ring (301). Two rotary guide fixing rings (301) are provided and fixed to the front end and back end of the high-relief grinding wheel (206), respectively. A toothed ring (302) is fixedly connected to the front end of the rotary guide fixing ring (301). The front end of the toothed ring (302) has a tooth groove (303). A transmission gear (304) is movably connected to the back end of the side plate (205) at the position corresponding to the toothed ring (302) via a rotating shaft. The back end of the transmission gear (304) and the front end of the toothed ring (302) are meshed through the tooth groove (303). A transmission rod (305) is fixedly connected to the left side of the transmission gear (304). A blasting part fixing plate (305) is fixedly connected to both the front end and the back end of the grinding adjustment block (204). 6) A sandblasting tank (307) is fixedly connected to the bottom of the back end of the sandblasting part fixing plate (306). A sandblasting pipe (308) is fixedly connected to the back end of the sandblasting tank (307). A sandblasting nozzle (309) is fixedly connected to the end of the sandblasting pipe (308) away from the sandblasting tank (307). The front end of the sandblasting nozzle (309) is fixedly connected to the front end of the inner wall of the grinding adjustment block (204). A sandblasting adjustment port (310) is movably connected to the right side of the sandblasting nozzle (309) through a rotating shaft. The sandblasting adjustment port (310) and the transmission rod (305) are connected through a transmission belt. An adjustment port fixing ring (311) is movably connected to the surface of the sandblasting adjustment port (310) through a rotating shaft. The front end of the adjustment port fixing ring (311) is fixedly connected to the front end of the inner wall of the grinding adjustment block (204).

4. A grinding machine for the inner weld height of a straight seam welded pipe according to claim 2, characterized in that: The depth limiting mechanism (400) includes a meshing transmission assembly (401), which is disposed at the front end of the grinding adjustment block (204). A straight seam pipe inner wall contact plate (402) is disposed at the top of the grinding adjustment block (204), and a telescopic rod (403) is fixedly connected to the bottom of the straight seam pipe inner wall contact plate (402). The telescopic rod (403) and the meshing transmission assembly (401) are fixedly connected.

5. A grinding machine for the inner weld height of a straight seam welded pipe according to any one of claims 2 to 4, characterized in that: The grinding wheel stabilizing mechanism (500) includes an inner slide rod (501). Two inner slide rods (501) are provided, and both are slidably connected to the inner cavity of the inner wall contact plate (402) of the straight seam pipe. The bottom of the inner slide rod (501) penetrates the bottom of the inner wall contact plate (402) of the straight seam pipe. A grinding wheel auxiliary stabilizing plate (502) is provided at the bottom of the inner slide rod (501). A straight seam pipe inner wall trigger rod (503) is fixedly connected to the top of the inner slide rod (501). The top of the straight seam pipe inner wall trigger rod (503) penetrates the top of the straight seam pipe inner wall contact plate (402). A spring (504) is movably sleeved on the surface of the inner slide rod (501). The top and bottom of the spring (504) are fixedly connected to the bottom of the straight seam pipe inner wall trigger rod (503) and the bottom of the inner wall of the straight seam pipe inner wall contact plate (402).

6. A grinding machine for the inner weld height of a straight seam welded pipe according to claim 5, characterized in that: The anti-splash mechanism (600) includes an anti-splash extension plate (601), which is disposed in the inner cavity of the contact plate (402) on the inner wall of the straight seam pipe. The front end and the back end of the anti-splash extension plate (601) are movably connected to a sliding control rod (602) via a rotating shaft. The end of the sliding control rod (602) away from the anti-splash extension plate (601) is movably connected to the front end of the trigger rod (503) on the inner wall of the straight seam pipe via a rotating shaft.

7. A grinding machine for the inner weld height of a straight seam welded pipe according to claim 6, characterized in that: The top and bottom of the anti-splash extension plate (601) are slidably connected to the top and bottom of the inner wall of the straight seam pipe inner wall contact plate (402). The right side of the anti-splash extension plate (601) extends through the right side of the straight seam pipe inner wall contact plate (402). The surface of the anti-splash extension plate (601) is provided with an anti-corrosion coating.

8. A grinding machine for the inner weld height of a straight seam welded pipe according to claim 4, characterized in that: The meshing transmission assembly (401) includes an adjusting block synchronous gear (401-1), the back end of which is fixedly connected to the front end of the grinding adjusting block (204), and the front end of the grinding support rod (203) is fixedly connected to a secondary gear fixing plate (401-2). The top of the back end of the secondary gear fixing plate (401-2) is movably connected to a secondary gear (401-3) via a rotating shaft. The right side of the secondary gear (401-3) is meshed with the left side of the adjusting block synchronous gear (401-1). The left side of the secondary gear fixing plate (401-2) is fixedly connected to an inner sliding groove plate (401-4), and the back end of the inner sliding groove plate (401-4) is slidably connected to a synchronous toothed plate (401-5).

9. A grinding machine for the inner weld height of a straight seam welded pipe according to claim 8, characterized in that: The left side of the synchronous gear plate (401-5) and the top right side of the telescopic rod (403) are fixedly connected, and the left side of the auxiliary gear fixing plate (401-2) and the bottom right side of the telescopic rod (403) are fixedly connected.

10. A grinding machine for the inner weld height of a straight seam welded pipe according to claim 5, characterized in that: The grinding wheel auxiliary stabilizing plate (502) is an L-shaped folded plate, and the grinding wheel auxiliary stabilizing plate (502) and the inner slide rod (501) are fixedly connected.

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