A welding positioner for the manhole plate of a double-walled oil tank

Abstract

This application belongs to the field of welding equipment manufacturing technology, specifically relating to a welding positioner for a double-layer manhole plate of an oil tank. The welding positioner includes a base and a flipping and positioning mechanism. A support plate of the flipping and positioning mechanism is connected to the base. Two sliders are arranged radially opposite to each other along the support plate, and the sliders are slidably connected to the support plate. Two drive motors are correspondingly arranged with the two sliders, and the drive motors are connected to the top of their respective sliders. Each drive motor has a rotating shaft. Two first clamping blocks are correspondingly arranged with the two drive motors, and the first clamping blocks are connected to the rotating shafts of their respective drive motors. The two first clamping blocks respectively clamp the opposite sides of the manhole plate in a first direction. This application enables automated and mechanized flipping of the manhole plate through the flipping and positioning mechanism, achieving continuous double-sided welding of the manhole plate without manual intervention or secondary clamping, significantly improving welding efficiency and quality, and possessing excellent practicality.

Description

Technical Field

[0001] This application belongs to the field of welding equipment manufacturing technology, specifically relating to a welding positioner for a double-layer oil tank manhole plate. Background Technology

[0002] Double-walled fuel tanks are storage tanks used to store fuel oil. They are typically buried underground at gas stations and are characterized by corrosion resistance and high safety. A manhole cover is usually connected to the top of the double-walled tank, allowing maintenance personnel to easily enter the tank for inspection.

[0003] In related technologies, during the manufacturing of manhole covers, full penetration welding is required, which can be achieved through double-sided welding. Double-sided welding is usually used to achieve full penetration welding of the manhole cover.

[0004] In the process of implementing the above technical solution, the applicant discovered at least the following shortcomings in the relevant technology: After the manhole cover plate is welded on one side facing the welding equipment, the other side needs to be welded. The current method involves removing the welded side of the manhole cover plate from the clamping device, flipping it over, and then re-clamping it for welding the other side. This method is not only cumbersome and requires manual intervention, consuming significant time and manpower, but the secondary clamping also makes it difficult to guarantee the positional accuracy of the manhole cover plate, easily leading to positioning deviations that further affect welding quality. This results in low welding efficiency and fails to meet the demands of large-scale industrial production for efficient and high-precision welding. Summary of the Invention

[0005] Based on the above-mentioned technical problems, this application provides a welding positioner for the manhole plate of a double-layer oil tank, so as to realize the flipping of the manhole plate through mechanical automation.

[0006] This application is achieved through the following technical solution: A welding positioner for a double-layer manhole plate of an oil tank, used to assist in the welding of the manhole plate, the welding positioner includes: a base; a flipping and positioning mechanism including: a support plate connected to the base; two sliders arranged radially opposite to each other along the support plate, the sliders being slidably connected to the support plate; two drive motors, each corresponding to one of the two sliders, the drive motors being connected to the top of the corresponding sliders, the drive motors having a rotating shaft; and two first clamping blocks, each corresponding to one of the two drive motors, the first clamping blocks being connected to the rotating shaft of the corresponding drive motor, the two first clamping blocks respectively clamping opposite sides of the manhole plate in a first direction.

[0007] In some embodiments, the top surface of the support plate is provided with two guide portions, which are arranged opposite to each other along the radial direction of the support plate. The slider and the guide portions are arranged in a one-to-one correspondence, and the slider is slidably disposed on the corresponding guide portion.

[0008] In some embodiments, the flipping and repositioning mechanism further includes a telescopic member that extends and retracts vertically. The telescopic member is configured in a one-to-one correspondence with the slider and the drive motor, and the telescopic member connects the corresponding slider and the drive motor.

[0009] In some embodiments, the flipping and repositioning mechanism further includes: two second clamping blocks, the second clamping blocks and the first clamping block being spaced apart and arranged around the periphery of the manhole plate, the second clamping blocks and the first clamping blocks being arranged in a one-to-one correspondence, the second clamping blocks being connected to the corresponding first clamping blocks via connecting rods, the two second clamping blocks respectively clamping the opposite sides of the manhole plate in a second direction, the first direction and the second direction being perpendicular to each other.

[0010] In some embodiments, the telescopic member is an electric push rod.

[0011] In some embodiments, the telescopic member includes: a first rod and a second rod, the bottom end of the first rod being connected to the slider, the bottom end of the second rod slidably passing through the top end of the first rod, the drive motor being connected to the top end of the second rod, the inner wall of the first rod having a first slot, and the side wall of the second rod having a through second slot; a locking motor connected to the inner side wall of the second rod, the locking motor being electrically connected to the drive motor, the locking motor having a reciprocating telescopic end; a locking block connected to the telescopic end of the locking motor, the locking block being able to pass through the second slot into the first slot; the flipping and repositioning mechanism further includes a roller, the roller being connected to the outer side of the second clamping block.

[0012] In some embodiments, the telescopic member further includes a buffer spring that connects the second rod and the slider.

[0013] In some embodiments, the top surface of the support plate is provided with multiple rows of protrusions, the protrusions are arc-shaped, and the multiple rows of protrusions extend along the second direction. During the flipping of the manhole plate, the rollers and the multiple rows of protrusions come into contact in sequence.

[0014] In some embodiments, the flipping and repositioning mechanism further includes a piston plate, the inner side of which slides through the outer side of the second clamping block, the piston plate being elastically connected to the second clamping block, and a roller connected to the outer end of the piston plate so that the roller can reciprocate relative to the second clamping block.

[0015] In some embodiments, the surface of the second clamping block is provided with an air inlet, which communicates with the interior for accommodating the piston plate; the interior of the second clamping block communicates with the interior of the corresponding first clamping block, and the inner side of the first clamping block is provided with an air jet port.

[0016] The welding positioner for the manhole plate of a double-layer oil tank provided in this application, during the process of assisting manual welding of the manhole plate, controls the two sliders of the flipping and positioning mechanism to slide towards each other on the support plate, so that the drive motors on the two sliders and the first clamping blocks also move towards each other until the two first clamping blocks clamp the two sides of the manhole plate. The manhole plate is then transferred to the support of the flipping and positioning mechanism, and the welding equipment is used to complete the welding of one side of the manhole plate to the pipe body. Subsequently, the rotation of the drive motor is used to drive the manhole plate to flip so that the other side of the manhole plate faces the welding equipment, so that the welding equipment can complete the welding of the other side of the manhole plate to the pipe body.

[0017] As can be seen from the above, the welding positioner for the manhole plate of the double-layer oil tank provided in this application can realize the automatic and mechanized flipping operation of the manhole plate through the flipping and positioning mechanism. That is, it can realize the position adjustment of the manhole plate during the welding process to achieve continuous welding of the manhole plate on both sides without manual intervention and secondary clamping, which greatly improves the welding efficiency and welding quality and has good practicality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0019] Figure 1 A welding positioner for a double-walled oil tank manhole plate is shown in one or more embodiments of this application; Figure 2 It shows Figure 1 Another structural diagram from another perspective; Figure 3 It shows Figure 1 A schematic diagram of the flipping and repositioning mechanism in the middle; Figure 4 It shows Figure 3 An explosion diagram; Figure 5 It shows Figure 3 Enlarged view of point A; Figure 6 A schematic diagram of the assembly of the drive motor and the first clamping block is shown. Figure 7 An assembly diagram of the second clamping block and the first clamping block is shown; Figure 8 A schematic diagram of the telescopic component is shown; Figure 9 A schematic diagram of the second clamping block is shown.

[0020] Explanation of reference numerals in the attached figures: 100. Base; 101. Top plate; 102. Support shaft; 200. Flip-over mechanism; 201. Support plate; 2011. Guide section; 2012. Protrusion; 202. Slider; 2021. Guide groove; 203. Drive motor; 2031. Rotating shaft; 2032. Connecting plate; 204. First clamping block; 2041. First clamping groove; 2042. Air nozzle; 205. Telescopic component; 2051. First rod; 2052. Second rod; 2053. First slot; 2054. Second slot; 2055. Locking motor; 2056. Locking block; 2057. Buffer spring; 206. Second clamping block; 2071. Second clamping groove; 2072. Air inlet; 207. Connecting rod; 208. Roller; 209. Piston plate; 300. Manhole plate. Detailed Implementation

[0021] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] Figure 1 The present application illustrates a welding positioner for the manhole plate of a double-walled oil tank according to one or more embodiments. Figure 2 It shows Figure 1 Another structural diagram from the perspective of Figure 3 It shows Figure 1 A schematic diagram of the flipping and repositioning mechanism in the middle. Figure 4 It shows Figure 3 A schematic diagram of the explosion. Combined with... Figures 1-4This application provides a welding positioner for a double-layer manhole plate of an oil tank, used to assist in the welding of a manhole plate. The welding positioner includes a base 100 and a flipping and positioning mechanism 200. The flipping and positioning mechanism 200 includes a support plate 201, a slider 202, a drive motor 203, and a first clamping block 204. The support plate 201 is connected to the base 100. Two sliders 202, two drive motors 203, and two first clamping blocks 204 are each provided in a corresponding manner. The sliders 202 are arranged opposite each other along the radial direction of the support plate 201 and are slidably connected to the support plate 201. The drive motor 203 is connected to the top of the corresponding slider 202 and has a rotating shaft 2031. The first clamping blocks 204 are connected to the rotating shaft 2031 of the corresponding drive motor 203, and the two first clamping blocks 204 respectively clamp the opposite sides of the manhole plate 300 in a first direction.

[0023] The welding positioner for a double-walled oil tank manhole plate provided in this application, during the process of assisting manual welding of the manhole plate, controls the two sliders 202 of the flipping and positioning mechanism 200 to slide towards each other on the support plate 201, causing the drive motors 203 and the first clamping blocks 204 on the two sliders 202 to also move towards each other until the two first clamping blocks 204 clamp both sides of the manhole plate 300. The manhole plate 300 is then transferred to the support of the flipping and positioning mechanism 200, and the welding equipment is used to complete the welding of one side of the manhole plate 300 to the pipe body. Subsequently, the rotation of the drive motor 203 drives the manhole plate 300 to flip so that the other side of the manhole plate 300 faces the welding equipment, so that the welding equipment can complete the welding of the other side of the manhole plate 300 to the pipe body. The specific settings of the welding positioner are now further described with reference to the accompanying drawings.

[0024] Combination Figure 1 as well as Figure 2 In some embodiments, the base 100 is the carrier of the entire welding positioner and is used to install the other components of the entire welding positioner. The base 100 includes a top plate 101 and a support shaft 102 located on its top. The top plate 101 extends in the horizontal direction, and the support shaft 102 is arranged in the vertical direction. The support shaft 102 is connected to the top of the top plate 101. The bottom center of the support plate 201 of the flipping and positioning mechanism 200 can be connected to the top of the support shaft 102 by bolts or other components.

[0025] Figure 5 It shows Figure 3 The enlarged diagram at point A, combined with Figure 5In some embodiments, the top surface of the support disk 201 is provided with two guide portions 2011, which are arranged opposite to each other along the radial direction of the support disk 201. The slider 202 and the guide portions 2011 are arranged in a one-to-one correspondence. The slider 202 is slidably disposed on the corresponding guide portion 2011 to guide the reciprocating movement of the slider 202 and the components mounted on the slider 202. For example, the guide portion 2011 is a protrusion extending from the edge of the support disk 201 to the center of the support disk 201, and the bottom of the slider 202 is provided with a guide groove 2021 corresponding to the protrusion 2012. In other configurations, the guide portion 2011 may also be a guide groove extending from the edge of the support disk 201 to the center of the support disk 201, and the bottom of the slider 202 is provided with a protrusion corresponding to the guide groove. Both configurations can achieve the purpose of guiding the reciprocating movement of the slider 202 and the components mounted on the slider 202. This application does not limit the scope of the configuration.

[0026] In some embodiments, the slider 202 is a linear motor, which can reciprocate directly along the guide portion 2011 on the support plate 201 using its own power. In other embodiments, the slider 202 can also be driven by external power to reciprocate along the guide portion 2011 on the support plate 201, for example, by a mechanism such as an electric push rod or a ball screw. This application does not limit this.

[0027] Combination Figures 3-5 In some embodiments, the flipping and repositioning mechanism 200 further includes a telescopic member 205, which extends and retracts vertically. The telescopic member 205 is configured in a one-to-one correspondence with the slider 202 and the drive motor 203. The telescopic member 205 connects the corresponding slider 202 and the drive motor 203, that is, the drive motor 203 can move back and forth vertically relative to the support plate 201.

[0028] In some embodiments, the telescopic member 205 is an electric push rod, that is, it can actively control the drive motor 203 to move vertically back and forth relative to the support plate 201. When it is necessary to rotate the manhole plate 300 by driving the drive motor 203, the telescopic member 205 extends to drive the drive motor 203 to rise, increasing the distance between the manhole plate 300 and the support plate 201, so that the distance between the manhole plate 300 and the support plate is greater than the radius of the manhole plate 300. Subsequently, the drive motor 203 rotates the manhole plate 300. After the manhole plate 300 is rotated into place, the telescopic member 205 is retracted to reset the manhole plate 300 to the processing position. This method can achieve the requirements of rotating the manhole plate 300 and welding both sides while reducing the height occupied by the welding positioner. In other embodiments, the telescopic member 205 may not have an active telescopic function, as detailed in the relevant description below.

[0029] Figure 6 A schematic diagram of the assembly of the drive motor and the first clamping block is shown. (Combined with...) Figure 6 In some embodiments, the first clamping block 204 is arc-shaped to match the manhole plate 300. The outer side of the first clamping block 204 can be connected to the rotating shaft 2031 of the drive motor 203 by welding, screw connection or other means. The inner side of the first clamping block 204 is provided with a first clamping groove 2041, and the edge of the manhole plate 300 is embedded in the first clamping groove 2041.

[0030] In some embodiments, the drive motor 203 is equipped with a reducer so that the drive motor 203 can drive the manhole plate 300 to rotate and flip at a lower speed, ensuring the safety of construction operations.

[0031] Combination Figures 3-5 To improve the reliability of the first clamping block 204 in flipping the manhole plate 300, in some embodiments, the flipping and repositioning mechanism 200 further includes two second clamping blocks 206. Figure 7 An assembly diagram of the second clamping block and the first clamping block is shown, combined with... Figure 7The second clamping block 206 and the first clamping block 204 are spaced apart and arranged around the periphery of the manhole plate 300. The second clamping block 206 and the first clamping block 204 are arranged in a one-to-one correspondence. The second clamping block 206 is connected to the corresponding first clamping block 204 through a connecting rod 207. The two second clamping blocks 206 respectively clamp the opposite sides of the manhole plate 300 in a second direction, and the first direction and the second direction are perpendicular to each other. That is, through the limiting clamping of the two first clamping blocks 204 and the two second clamping blocks 206, more clamping points are increased to keep the manhole plate 300 fixed with the first clamping blocks 204 and the second clamping blocks 206 during the flipping process, so as to ensure the stability of clamping, flipping and subsequent welding. For example, the second clamping block 206 is also arc-shaped to fit the manhole plate 300. A second clamping groove 2061 is provided on the inner side of the second clamping block 206. The edge portion of the manhole plate 300 is embedded in the second clamping groove 207. The second clamping block 206, the corresponding first clamping block 204, and the connecting rod 207 can be integrally formed to have sufficient strength. In other configurations, both ends of each second clamping block 206 can also be connected to two first clamping blocks 204 via the connecting rod 207; this application does not limit this.

[0032] Figure 8 A structural schematic diagram of the telescopic component is shown, combined with... Figure 8 In some embodiments, the telescopic member 205 includes a first rod 2051 and a second rod 2052 that can extend and retract relative to each other. The bottom end of the first rod 2051 is connected to a slider 202, and the bottom end of the second rod 2052 slides through the top end of the first rod 2051. The drive motor 203 is connected to the top end of the second rod 2052 through a connecting plate 2032. The inner wall of the first rod 2051 is provided with a first slot 2053, and the side wall of the second rod 2052 is provided with a through second slot 2054. The telescopic component 205 also includes a locking motor 2055 and a locking block 2056. The locking motor 2055 is connected to the inner wall of the second rod 2052 and is electrically connected to the drive motor 203. The locking motor 2055 has a telescopic end that moves back and forth. The locking block 2056 is connected to the telescopic end of the locking motor 2055 and can be inserted into the first slot 2053 through the second slot 2054. Figure 9 A schematic diagram of the second clamping block is shown, combined with Figure 9 The flipping and shifting mechanism 200 also includes a roller 208, which is connected to the outside of the second clamping block 206.

[0033] Before the manhole plate 300 is flipped using the drive motor 203, the locking motor 2055 drives the locking block 2056 to pass through the second slot 2054 into the first slot 2053. The first rod 2051 and the second rod 2052 remain locked, so that the manhole plate 300 is in a fixed position, which facilitates the welding of the manhole plate 300. After one side of the manhole plate 300 is welded, when the manhole plate 300 needs to be flipped using the drive motor 203, the drive motor 203 sends a signal to the locking motor 2055. The locking block 2056 of the locking motor 2055 exits the first slot 2053 to release the locking of the first rod 2051 and the second rod 2052. Then, the drive motor 203 is started, and the drive motor 203 flips the manhole plate 300. During the flipping process, the roller 208 on the second clamping block 206 can move with the manhole plate 300. The manhole plate 300 flips over and comes into contact with the support plate 201 below. Upon contact, it receives a reaction force from the support plate 201, which drives the second clamping block 206, connecting rod 207, first clamping block 204, drive motor 203, and manhole plate 300 to push upwards simultaneously. As the drive motor 203 pushes upwards, it drives the second rod 2052 to extend from the top of the first rod 2051. As the roller 208 moves continuously against the support plate 201, the manhole plate 300 is finally flipped over. Under the action of gravity, the second rod 2052 retracts into the first rod 2051. The drive motor 203 stops working and sends a signal to the locking motor 2055. The locking motor 2055 starts and inserts the locking block 2056 into the first slot 2053, locking the first rod 2051 and the second rod 2052 together. The manhole plate 300 is then stably positioned above the support plate 201. This method enables the flipping of the manhole plate by 300 mm and the double-sided welding operation to be carried out at a lower cost while reducing the height occupied by the welding positioner.

[0034] Figure 9 A schematic diagram of the second clamping block is shown, combined with Figure 9 In some embodiments, the roller 208 is rotatably connected to the position of the second clamping block 206 so that during the continuous movement after the roller 208 abuts against the top surface of the support disk 201, the roller 208 and the support disk 201 experience rolling friction, which effectively reduces structural wear and improves its service life.

[0035] Combination Figure 8In some embodiments, the telescopic member 205 further includes a buffer spring 2057, which connects the second rod 2052 and the slider 202. This allows the manhole cover 300 to descend slowly during its rotation and lowering process, avoiding excessive impact from a rapid descent and ensuring construction safety. For example, the bottom of the second rod 2052 is unobstructed, the top of the buffer spring 2057 is located within the second rod 2052 and connected to the inner top of the second rod 2052, while the top of the buffer spring 2057 is connected to the top of the slider 202.

[0036] In related technologies, a large amount of spatter and slag are generated during the welding of manhole plates with a diameter of 300 mm. These spatter and slag adhere firmly to the weld surface and surrounding area, affecting the weld formation quality, making the weld surface rough and uneven, reducing surface finish, and requiring additional specialized cleaning procedures. The cleaning process is labor-intensive and time-consuming, increasing production costs. Therefore, this application further improves the welding positioner.

[0037] Combination Figure 3 as well as Figure 4 In some embodiments, the top surface of the support plate 201 is provided with multiple rows of protrusions 2012. The protrusions 2012 are arc-shaped and extend along a second direction. During the rotation of the manhole plate 300, the roller 208 contacts the multiple rows of protrusions 2012 in sequence. During the rotation of the manhole plate 300, the roller 208 moves on the support plate 201 and frequently contacts and collides with the multiple rows of protrusions 2012. Under the condition that the telescopic member 205 is telescopic, the roller 208 continuously drives the manhole plate 300 to vibrate slightly up and down, forming a micro-vibration treatment on the weld area after welding, which promotes the refinement of the molten pool metal grains, uniform stress release, and significantly reduces the tendency of porosity and cracking. At the same time, the vibration loosens the spatter adhering material, allowing the weld slag to fall off naturally, thus saving a certain amount of subsequent cleaning process. For example, the protrusion 2012 is arc-shaped and is arranged side by side along the second direction on the path on which the roller 208 travels on the support plate 201, and the protrusion 2012 is arc-shaped so that the roller 208 can pass smoothly.

[0038] join Figure 9In some embodiments, the flipping and repositioning mechanism 200 further includes a piston plate 209, which slides through the outer side of the second clamping block 206 and is elastically connected to the second clamping block 206. A roller 208 is connected to the outer end of the piston plate 209 so that the roller 208 can reciprocate relative to the second clamping block 206. An air inlet 2072 is provided on the surface of the second clamping block 206, and the air inlet 2072 communicates with the interior for accommodating the piston plate 209. The interior of the second clamping block 206 communicates with the interior of the corresponding first clamping block 204, and an air jet port 2042 is provided on the inner side of the first clamping block 204. With this configuration, as the roller 208 continuously touches the protrusion 2012, the roller 208 experiences the same reaction force, which drives the piston plate 209 to press into the second clamping block 206. This forces the air inside the second clamping block 206 into the first clamping block 204, and then evenly sprays it outward through the air jet 2042 on the inner side of the first clamping block 204. This causes the deposits in the weld area to detach and fall off during the vibration, further improving the cleaning effect. At the same time, the air also cools the weld surface to a certain extent, further improving the weld formation quality and surface finish, while reducing the adhesion of excess weld slag. In addition, when the piston plate 209 is pressed into the second clamping block 206, the air is ejected through the jet nozzle 2042 of the first clamping block 204. As the roller 208 disengages from the protrusion, it is briefly bounced by the spring inside the second clamping block 206, causing the piston plate 209 and the roller 208 to rebound. As a result, the air inside the second clamping block 206 is quickly drawn in through the air inlet 2072. As the roller 208 collides with the protrusion, the air is then discharged through the jet nozzle 2042, forming a periodic airflow circulation, which enhances the cooling and cleaning effect.

[0039] join Figure 6 , Figure 7 as well as Figure 9 For example, the air inlet 2072 is located on the top of the second clamping block 206. The air inlet 2072 is square to ensure the intake of air. The connecting rod 207 connecting the first clamping block 204 and the second clamping block 206 is hollow to achieve gas delivery while connecting the first clamping block 204 and the second clamping block 206. The inner side of the first clamping block 204 is provided with two rows of exhaust ports, which are distributed on the upper and lower sides of the first clamping groove 2041 to ensure sufficient air delivery area and improve cooling and cleaning effects.

[0040] In summary, the welding positioner for the manhole plate of the double-layer oil tank provided in this application can realize the automatic and mechanized flipping operation of the manhole plate 300 through the flipping and positioning mechanism 200, so as to realize the continuous double-sided welding of the manhole plate 300 without manual intervention and secondary clamping. It can also improve the cooling and cleaning effect of the welding surface to a certain extent, greatly improve the welding efficiency and welding quality, and has good practicality.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A welding positioner for the manhole plate of a double-walled oil tank, used to assist in the welding of the manhole plate, characterized in that, The welding positioner includes: Base; The flipping and repositioning mechanism includes: Support plate, connected to the base; Two sliders are arranged radially opposite to the support disk, and the sliders are slidably connected to the support disk; Two drive motors are provided, and two sliders are provided in a one-to-one correspondence. The drive motors are connected to the top of the corresponding sliders, and the drive motors have a rotating shaft. Two first clamping blocks are provided in a one-to-one correspondence with the two drive motors. The first clamping blocks are connected to the rotation shaft of the corresponding drive motor. The two first clamping blocks respectively clamp the opposite sides of the manhole plate in the first direction. The flipping and repositioning mechanism also includes a telescopic component, which extends and retracts vertically. The telescopic component is configured in a one-to-one correspondence with the slider and the drive motor, and the telescopic component connects the corresponding slider and the drive motor. The flipping and repositioning mechanism also includes: Two second clamping blocks are arranged around the periphery of the manhole plate at intervals with the first clamping block. The second clamping blocks and the first clamping blocks are arranged in a one-to-one correspondence. The second clamping blocks are connected to the corresponding first clamping blocks through connecting rods. The two second clamping blocks clamp the opposite sides of the manhole plate in a second direction, and the first direction and the second direction are perpendicular to each other. The telescopic component includes: A first rod and a second rod, the bottom end of the first rod is connected to the slider, the bottom end of the second rod slides through the top end of the first rod, the drive motor is connected to the top end of the second rod, the inner wall of the first rod is provided with a first slot, and the side wall of the second rod is provided with a through second slot; A locking motor is connected to the inner wall of the second rod body. The locking motor is electrically connected to the drive motor and has a reciprocating telescopic end. A locking block is connected to the telescopic end of the locking motor, and the locking block can be inserted into the first slot through the second slot; The flipping and repositioning mechanism also includes rollers, which are connected to the outside of the second clamping block; The top surface of the support plate is provided with multiple rows of protrusions, which are arc-shaped and extend along the second direction. During the process of the manhole plate flipping, the rollers and the multiple rows of protrusions come into contact in sequence. The flipping and repositioning mechanism also includes a piston plate, the inner end of which slides through the outer side of the second clamping block, the piston plate is elastically connected to the second clamping block, and the roller is connected to the outer end of the piston plate so that the roller can reciprocate relative to the second clamping block. The surface of the second clamping block is provided with an air inlet, which communicates with the interior for accommodating the piston plate; The interior of the second clamping block is connected to the interior of the corresponding first clamping block, and an air jet is provided on the inner side of the first clamping block.

2. The welding positioner for the manhole plate of a double-walled oil tank according to claim 1, characterized in that, The top surface of the support plate is provided with two guide portions, which are arranged opposite each other along the radial direction of the support plate. The slider and the guide portions are arranged in a one-to-one correspondence, and the slider is slidably disposed on the corresponding guide portion.

3. The welding positioner for the manhole plate of a double-walled oil tank according to claim 1, characterized in that, The telescopic component also includes a buffer spring, which connects the second rod and the slider.

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