Pulse laser welding equipment for mechanical valve body assembly for petroleum equipment

Abstract

The invention relates to the technical field of pulse laser welding, in particular to pulse laser welding equipment for a mechanical valve body assembly for petroleum equipment. A body is included; a workbench is rotationally mounted at the upper end of the machine body; a mounting frame is fixedly mounted at the upper end of the machine body; the polishing rod is arranged; according to the laser welding device, the polishing rod is used for polishing a to-be-welded part before laser welding and removing an oxide layer in a to-be-welded area, so that the links of transferring, temporary storage and the like are not needed, the production period is shortened, the generation of a secondary oxide layer is avoided, a laser transmitter can directly weld the polished area, and the production efficiency is improved. In addition, after welding is completed, the grinding rod can directly grind and polish a laser welding part in a high-temperature state, impurities can be removed easily, the grinding difficulty can be reduced easily, and the welding quality is improved. And the overall welding efficiency of the valve body assembly is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pulse laser welding, in particular to a pulse laser welding device for mechanical valve body components used in petroleum equipment. Background Art

[0002] Mechanical valve body components for petroleum equipment usually refer to the core components of valve bodies used in various equipment in the process of oil extraction, transportation, refining, etc. They play an important role in controlling, guiding, regulating and cutting off the flow of fluids (such as crude oil, natural gas, water, etc.) in the oil industry; Mechanical valve body components include valve body, valve core, valve seat, seals and other parts. The processing quality directly determines the sealing, corrosion resistance, pressure bearing capacity and service life of the valve. Welding connection has the advantages of good sealing performance, high strength and low leakage. The welding of valve body components is mostly done by pulse laser welding. This is because traditional welding processes are prone to problems such as cold welding, shallow molten pool or discontinuous welding. Pulse laser welding can effectively meet the high pressure bearing and sealing requirements of such valve cores by accurately controlling parameters such as pulse energy and pulse width, and has no pores and strong sealing. Valve components are mostly made of metal (such as stainless steel, copper alloy, etc.), so an oxide layer is easily formed on the surface of the valve components during processing or storage. The presence of the oxide layer will not only increase the laser reflectivity, but also the gas generated by decomposition under high-temperature welding will easily form pore defects. Therefore, before pulse laser welding, the welding area needs to be pre-treated (such as manual polishing) to remove the oxide layer. For large quantities of workpieces, they need to go through transportation, temporary storage and other links, which not only prolongs the production cycle, but also because the metal surface is highly active, it contacts with oxygen and water vapor in the air to form a secondary oxide layer, which makes the laser energy absorption rate drop again during welding, and ultimately affects the actual effect of pulse laser welding.

[0003] In view of this, in order to overcome the above technical problems, the present invention proposes a pulse laser welding device for a mechanical valve body assembly for petroleum equipment, which solves the above technical problems. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, the present invention proposes a pulsed laser welding device for a mechanical valve body assembly of petroleum equipment. By setting a grinding rod, the grinding rod grinds the part to be welded before laser welding to remove the oxide layer in the welding area, thus eliminating the need for processes such as transportation and temporary storage. This not only shortens the production cycle but also avoids the generation of a secondary oxide layer, facilitating the direct welding of the laser emitter to the ground area, thereby preventing the decrease in the absorption rate of laser energy during welding and effectively improving the actual effect of pulsed laser welding. In addition, after welding, the grinding rod can directly grind and polish the laser welding part in a high-temperature state, which is not only conducive to removing impurities but also helps to reduce the grinding difficulty and improve the overall welding efficiency of the valve body assembly.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A pulsed laser welding device for a mechanical valve body assembly of petroleum equipment according to the present invention includes a machine body; a workbench is rotatably installed at the upper end of the machine body; a mounting frame is fixedly installed at the upper end of the machine body; a laser emitter is installed between the mounting frame and the machine body; a hydraulic push rod is fixedly installed at the lower end of the mounting frame; a mounting plate is fixedly installed at the end of the hydraulic push rod away from the mounting frame; mounting grooves are opened on both sides of the mounting plate; the laser emitter is rotatably installed in the mounting groove on one side of the mounting plate; a servo motor is rotatably installed in the mounting groove on the side of the mounting plate away from the laser emitter; a grinding rod is installed at the output end of the servo motor; a circular groove is opened at the upper end of the workbench; a rotating plate is rotatably connected in the circular groove; a driving motor is installed inside the machine body; the driving motor is used to drive the workbench to rotate; the driving motor and the rotating plate are connected through a driving module; a limiting unit is installed at the upper end of the rotating plate; the limiting unit is used to limit the valve body assembly.

[0006] Preferably, an eccentric column is rotatably connected in the mounting groove; a rocker is rotatably connected to one side of the mounting plate; the rocker is fixedly connected to the eccentric column.

[0007] Preferably, a protrusion is fixedly connected to the surface of the eccentric column; a hinge plate is rotatably connected in the mounting groove; both the laser emitter and the servo motor are fixedly connected to the hinge plate; a rubber plate is fixedly connected to the surface of the hinge plate; the rubber plate is made of silicone rubber material.

[0008] Preferably, the driving module includes a bevel gear ring and a bevel gear shaft; the bevel gear shaft is fixedly connected to the rotating plate; the bevel gear ring is fixedly connected to the workbench; a cavity is opened inside the machine body; the driving motor is installed in the cavity; a groove is opened at the output end of the driving motor; a double-headed bevel gear is slidably and sealingly connected in the groove; the double-headed bevel gear is connected to the bottom of the groove through a connecting spring; an electromagnetic plate is embedded at the bottom of the groove.

[0009] Preferably, a square groove is formed at the output end of the servo motor; the grinding rod is slidably connected in the square groove; the grinding rod is connected to the bottom of the square groove through a fixing spring; an electromagnetic sheet is embedded at the bottom of the square groove.

[0010] Preferably, the limiting unit includes a limiting plate; a sliding groove is formed on one side of the rotating plate; the limiting plate is installed in the sliding groove; a strip-shaped groove is formed at the upper end of the limiting plate; two abutting rods are slidably connected in the strip-shaped groove, and the two abutting rods are respectively set as I-shaped and L-shaped; the I-shaped abutting rod is connected to the groove wall of the strip-shaped groove through a first spring; the L-shaped abutting rod is connected to the limiting plate through a second spring; an electromagnetic ring is fixedly connected to the lower end of the L-shaped abutting rod; a electro-hydraulic push rod connected to the machine body is arranged above the workbench; a magnet is embedded on one side of the electro-hydraulic push rod close to the limiting plate.

[0011] Preferably, rubber blocks are installed at the upper ends of the two abutting rods; a clamping groove is formed on one side of the rubber block above the L-shaped abutting rod; a clamping block matched with the clamping groove is fixedly connected to one side of the rubber block above the I-shaped abutting rod; the rubber block is made of silicone rubber material; an annular groove is formed on the surface of the I-shaped abutting rod.

[0012] Preferably, a sliding plate is slidably connected in the sliding groove; the limiting plate is in sliding contact with the sliding plate; a screw rod is rotatably connected to the upper end of the sliding plate; the screw rod is in screw drive connection with the limiting plate.

[0013] The beneficial effects of the present invention are as follows: By arranging the grinding rod, the present invention enables the grinding rod to grind the part to be welded before laser welding, removing the oxide layer in the welding area, so that there is no need for processes such as transportation and temporary storage, which not only shortens the production cycle but also avoids the generation of secondary oxide layers, facilitating the direct welding of the laser emitter to the ground area, thereby avoiding the decrease in the laser energy absorption rate during welding and effectively improving the actual effect of pulsed laser welding. In addition, after welding, the grinding rod can directly grind and polish the laser welding part in a high-temperature state, which is not only beneficial to removing impurities but also helps to reduce the grinding difficulty and improve the overall welding efficiency of the valve body assembly.

[0014] In the present invention, by providing an eccentric column, when the inclination angle of the laser emitter needs to be adjusted, the user only needs to rotate the rocker, so that the rocker drives the eccentric column to rotate, and the eccentric column rotates away from the hinge plate, creating a gap between the hinge plate and the eccentric column. At this time, the user only needs to manually rotate the hinge plate, so that the hinge plate can drive the laser emitter connected thereto to rotate, thereby realizing the adjustment of the inclination angle of the laser emitter. After adjusting the inclination angle of the laser emitter, the user only needs to rotate the rocker in the reverse direction, so that the rocker drives the eccentric column to rotate towards the hinge plate, and the water droplet rocker squeezes and presses against the hinge plate, making the inclined laser emitter and the grinding rod maintain a stable state, thus ensuring the stable progress of laser welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the drawings and embodiments.

[0016] Figure 1 is a perspective view of the present invention; Figure 2 is a partial cross-sectional view of the workbench used in the present invention; Figure 3 is Figure 2 an enlarged view of part A in Figure 4 is Figure 2 an enlarged view of part B in Figure 5 is Figure 2 an enlarged view of part C in Figure 6 is a partial cross-sectional view of the mounting plate used in the present invention; Figure 7 is Figure 6 an enlarged view of part D in In the figure: body 1, workbench 11, bevel gear ring 111, cavity 112, mounting bracket 12, laser emitter 121, hydraulic push rod 122, mounting plate 123, mounting groove 124, eccentric column 125, rocker 126, protrusion 127, hinge plate 128, rubber plate 129, servo motor 13, grinding rod 131, square groove 132, fixing spring 133, electromagnetic sheet 134, circular groove 14, rotating plate 141, bevel gear shaft 142, drive motor 15, groove 151, double-headed bevel gear 152, connecting spring 153, electromagnetic plate 154, limiting plate 16, chute 161, strip-shaped groove 162, pressing rod 163, first spring 164, second spring 165, electromagnetic ring 166, annular groove 167, sliding plate 168, screw 169, electro-hydraulic push rod 17, magnet 171, rubber block 18, card slot 181, clamping block 182. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0018] As shown in Figures 1 to 7 the figure, a pulsed laser welding device for a mechanical valve body assembly of a petroleum equipment according to the present invention includes a machine body 1; a workbench 11 is rotatably installed at the upper end of the machine body 1; a mounting frame 12 is fixedly installed at the upper end of the machine body 1; a laser emitter 121 is installed between the mounting frame 12 and the machine body 1; a hydraulic push rod 122 is fixedly installed at the lower end of the mounting frame 12; a mounting plate 123 is fixedly installed at one end of the hydraulic push rod 122 away from the mounting frame 12; mounting grooves 124 are formed on both sides of the mounting plate 123; the laser emitter 121 is rotatably installed in the mounting groove 124 on one side of the mounting plate 123; a servo motor 13 is rotatably installed in the mounting groove 124 on the side of the mounting plate 123 away from the laser emitter 121; a polishing rod 131 is installed at the output end of the servo motor 13; a circular groove 14 is formed at the upper end of the workbench 11; a rotating plate 141 is rotatably connected in the circular groove 14; a driving motor 15 is installed inside the machine body 1; the driving motor 15 is used to drive the workbench 11 to rotate; the driving motor 15 and the rotating plate 141 are connected through a driving module; a limiting unit is installed at the upper end of the rotating plate 141; the limiting unit is used to limit the valve body assembly.

[0019] As an embodiment of the present invention, an eccentric column 125 is rotatably connected in the mounting groove 124; a rocker 126 is rotatably connected to one side of the mounting plate 123; the rocker 126 is fixedly connected to the eccentric column 125.

[0020] As an embodiment of the present invention, a protrusion 127 is fixedly connected to the surface of the eccentric column 125; a hinge plate 128 is rotatably connected in the mounting groove 124; both the laser emitter 121 and the servo motor 13 are fixedly connected to the hinge plate 128; a rubber plate 129 is fixedly connected to the surface of the hinge plate 128; the rubber plate 129 is made of silicone rubber material.

[0021] As an embodiment of the present invention, the driving module includes a bevel gear ring 111 and a bevel gear shaft 142; the bevel gear shaft 142 is fixedly connected to the rotating plate 141; the bevel gear ring 111 is fixedly connected to the workbench 11; a cavity 112 is formed inside the machine body 1; the driving motor 15 is installed in the cavity 112; a groove 151 is formed at the output end of the driving motor 15; a double-headed bevel gear 152 is slidably and sealingly connected in the groove 151; the double-headed bevel gear 152 is connected to the bottom of the groove 151 through a connecting spring 153; an electromagnetic plate 154 is embedded at the bottom of the groove 151.

[0022] As an implementation manner of the present invention, a square groove 132 is provided at the output end of the servo motor 13; the grinding rod 131 is slidably connected in the square groove 132; the grinding rod 131 is connected to the bottom of the square groove 132 through a fixing spring 133; an electromagnetic sheet 134 is embedded in the bottom of the square groove 132.

[0023] During operation, the valve assembly is mostly made of metal materials (such as stainless steel, copper alloy, etc.), so an oxide layer is easily formed on the surface of the valve assembly during processing or storage. The existence of the oxide layer not only increases the laser reflectivity, but also the gas generated by decomposition under high-temperature welding is likely to form pore defects. Therefore, before pulsed laser welding, it is necessary to pre-treat the welding area (such as manual grinding) to remove the oxide layer. For a large number of workpieces, it is necessary to go through processes such as transportation and temporary storage, which not only prolongs the production cycle, but also forms a secondary oxide layer due to the high surface activity of the metal and contact with oxygen and water vapor in the air, resulting in a decrease in the laser energy absorption rate during welding again, ultimately affecting the actual effect of pulsed laser welding.

[0024] To address this, the present invention is provided with a grinding rod 131; the grinding rod 131 grinds the area to be welded before laser welding to remove the oxide layer in the area to be welded, so that there is no need to go through processes such as transportation and temporary storage, which not only shortens the production cycle, but also avoids the generation of a secondary oxide layer, facilitating the direct welding of the grinding area by the laser emitter 121, thereby avoiding a decrease in the laser energy absorption rate during welding and effectively improving the actual effect of pulsed laser welding. In addition, after welding is completed, the grinding rod 131 can directly grind and polish the laser welding area in a high-temperature state, which is not only conducive to removing impurities, but also helps to reduce the grinding difficulty and improve the overall welding efficiency of the valve body assembly.

[0025] In the initial state, if the user welds the valve body and the connecting pipeline (welding area), the user places the valve body on the upper end of the rotating plate 141; places the connecting pipeline on the valve body, and then uses the limiting unit to fix the valve body to the welding area; then the user controls the electromagnetic plate 154 to be energized, so that the electromagnetic plate 154 can adsorb the double-headed bevel gear 152 to squeeze the connecting spring 153 into the groove 151; so that the double-headed bevel gear 152 can move towards the bevel gear ring 111 until the double-headed bevel gear 152 meshes with the gear ring. At this time, the driving motor 15 is controlled to operate, so that the driving motor 15 can drive the double-headed bevel gear 152 to rotate, so that the double-headed bevel gear 152 can drive the bevel gear ring 111 to rotate, so that the bevel gear ring 111 drives the workbench 11 fixedly connected thereto to rotate synchronously, so that the workbench 11 can drive the rotating plate 141 at the upper end to rotate, so that the rotating plate 141 drives the valve body placed on the upper end to rotate 180°, so that the rotating plate 141 is located directly below the mounting plate 123.

[0026] When the valve body to be welded is directly below the hydraulic push rod 122, control the hydraulic push rod 122 to descend, so that the hydraulic push rod 122 can push the mounting plate 123 to descend, and the mounting plate 123 drives the laser emitter 121 and the grinding rod 131 to descend synchronously. At this time, control the electromagnetic sheet 134 to be energized, so that the electromagnetic sheet 134 adsorbs the grinding rod 131 and squeezes the fixed spring 133 into the square groove 132. As the hydraulic push rod 122 pushes the mounting plate 123 to drive the grinding rod 131 to descend until the grinding rod 131 is directly opposite to the welding area of the valve body. At this time, control the hydraulic push rod 122 to stop, and control the electromagnetic sheet 134 to be de-energized, so that the grinding rod 131 extends out of the square groove 132 under the pushing force of the restoring force of the fixed spring 133 and contacts the area to be welded. At this time, control the servo motor 13 to operate, so that the servo motor 13 can drive the grinding rod 131 to rotate, and the grinding rod 131 grinds the area to be welded. At this time, control the electromagnetic plate 154 to be de-energized, so that the double-headed bevel gear 152 extends out of the groove 151 under the pushing force of the restoring force of the connecting spring 153 and contacts the bevel gear shaft 142. At this time, the double-headed bevel gear 152 is separated from the bevel gear ring 111. Control the driving motor 15 to operate, so that the driving motor 15 can drive the bevel gear shaft 142 to rotate through the double-headed bevel gear 152, and the bevel gear shaft 142 can drive the rotating plate 141 fixedly connected thereto to rotate synchronously; the rotating plate 141 drives the valve body to rotate synchronously, so that the grinding rod 131 grinds the selected valve body, so that the grinding rod 131 can grind around the welding gap to be welded.

[0027] Since the pulsed laser head is equipped with a gas delivery system, such as the trachea, by controlling the orientation of the trachea to be consistent with the orientation of the pulsed laser head. Therefore, after the grinding rod 131 completes the pre-grinding, control the external air pump to deliver gas and spray it out through the trachea, so that the gas sprayed out by the trachea can blow towards the welding area of the valve body, so that the gas can remove the oxidized layer impurities ground off from the welding area of the valve body, thereby improving the cleanliness of the welding area of the valve body and preventing the gas generated by the decomposition of the oxidized layer impurities ground off during the welding process and forming pore defects. Then control the laser emitter 121 to emit pulsed laser towards the welding area of the valve body for laser welding. At this time, the driving motor 15 operates and drives the rotating plate 141 to drive the valve body to rotate for welding.

[0028] After welding is completed, control the trachea to spray normal-temperature nitrogen gas, so that the nitrogen gas can initially cool the welding area of the valve body, so that the molten metal residue in the welding area can solidify quickly. Then control the grinding rod 131 to perform secondary grinding on the welding area, so that the solidified metal residue can be quickly ground off before oxidation, preventing the solidified metal residue from increasing its hardness due to oxidation, reducing the grinding difficulty of the solidified metal residue, accelerating the grinding and falling-off rate of the solidified metal residue. At the same time, it can also reduce the wear of the grinding rod 131 and improve the service life of the grinding rod 131.

[0029] The eccentric column 125 is provided so that the user can rotate the laser emitter 121 and the servo motor 13 to adjust the tilt angles of the laser emitter 121 and the grinding rod 131. This is because different valve body shapes are not the same, and the welding areas of some valve bodies are blocked by their flanges, which makes it impossible for the laser emitter 121 to vertically irradiate the weld seam. Therefore, a better incident path can be obtained by adjusting the tilt angle of the laser emitter 121. Similarly, by adjusting the tilt angle of the grinding rod 131, a better welding path can be obtained for the grinding rod 131. When it is necessary to adjust the tilt angle of the laser emitter 121, the user only needs to rotate the rocker 126, so that the rocker 126 drives the eccentric column 125 to rotate, and the eccentric column 125 rotates away from the hinge plate 128, causing a gap to be generated between the hinge plate 128 and the eccentric column 125. At this time, the user only needs to manually rotate the hinge plate 128, so that the hinge plate 128 can drive the laser emitter 121 connected thereto to rotate, thereby realizing the adjustment of the tilt angle of the laser emitter 121. After adjusting the tilt angle of the laser emitter 121, the user only needs to rotate the rocker 126 in the reverse direction, so that the rocker 126 drives the eccentric column 125 to rotate towards the hinge plate 128, causing the rocker 126 to squeeze and press against the hinge plate 128.

[0030] By fixedly connecting a rubber plate 129 to the surface of the hinge plate 128, the rubber plate 129 can increase the friction between the hinge plate 128 and the eccentric column 125. Similarly, a protrusion 127 is fixedly connected to the surface of the eccentric column 125, so that the protrusion 127 can increase the surface roughness of the eccentric column 125, increasing the friction between the eccentric column 125 and the hinge plate 128, thereby improving the clamping effect of the eccentric column 125 on the hinge plate 128 and enabling the tilted laser emitter 121 and the grinding rod 131 to maintain a stable state.

[0031] As an implementation manner of the present invention, the limiting unit includes a limiting plate 16; a chute 161 is opened on one side of the rotating plate 141; the limiting plate 16 is installed in the chute 161; a strip-shaped groove 162 is opened at the upper end of the limiting plate 16; two abutting rods 163 are slidably connected in the strip-shaped groove 162, and the two abutting rods 163 are respectively set as an I-shaped and an L-shaped; one end of the I-shaped abutting rod 163 is connected to the groove wall of the strip-shaped groove 162 through a first spring 164; the L-shaped abutting rod 163 is connected to the limiting plate 16 through a second spring 165; an electromagnetic ring 166 is fixedly connected to the lower end of the L-shaped abutting rod 163; an electro-hydraulic push rod 17 connected to the machine body 1 is arranged above the workbench 11; a magnet 171 is embedded on one side of the electro-hydraulic push rod 17 close to the limiting plate 16.

[0032] As an embodiment of the present invention, rubber blocks 18 are installed at the upper ends of the two pressing rods 163; a clamping groove 181 is formed on one side of the rubber block 18 above the L-shaped pressing rod 163; a clamping block 182 that cooperates with the clamping groove 181 is fixedly connected to one side of the rubber block 18 above the I-shaped pressing rod 163; the rubber block 18 is made of silicone rubber material; an annular groove 167 is formed on the surface of the I-shaped pressing rod 163.

[0033] As an embodiment of the present invention, a sliding plate 168 is slidably connected in the sliding groove 161; the limiting plate 16 is in sliding contact with the sliding plate 168; a screw rod 169 is rotatably connected to the upper end of the sliding plate 168; the screw rod 169 is in screw drive connection with the limiting plate 16.

[0034] During operation, the user first rotates the screw rod 169 so that the screw rod 169 can drive the limiting plate 16 connected to it by screw drive to descend, so that the limiting plate 16 can descend relative to the sliding plate 168; the sliding plate 168 descends to a position directly opposite to the valve body connection port. At this time, the electro-hydraulic push rod 17 is controlled to extend so that the electro-hydraulic push rod 17 contacts the sliding plate 168. Since a magnet 171 is fixedly connected to the end of the electro-hydraulic push rod 17 in contact with the sliding plate 168, the electro-hydraulic push rod 17 can be tightly adsorbed to the sliding plate 168 through the magnet 171. Subsequently, the electro-hydraulic push rod 17 is controlled to contract so that the electro-hydraulic push rod 17 pulls the sliding plate 168 out of the sliding groove 161, so that the sliding plate 168 drives the limiting plate 16 to move synchronously. Then, the valve body is placed on the rotating plate 141 so that the valve body connection port is aligned with the limiting plate 16. Then, the electro-hydraulic push rod 17 is controlled to extend so that the electro-hydraulic push rod 17 can push the sliding plate 168 into the sliding groove 161, so that the sliding plate 168 drives the limiting plate 16 to insert into the connection port of the valve body. After the limiting plate 16 drives the pressing rod 163 to the valve body, the electromagnetic ring 166 is controlled to be energized so that the electromagnetic ring 166 generates a magnetic adsorption force on the limiting plate 16, so that the electromagnetic ring 166 drives the L-shaped pressing rod 163 to compress the second spring 165 and rise until the L-shaped pressing rod 163 extends out of the strip-shaped groove 162 and contacts the inner wall of the welding joint of the valve body.

[0035] Since clamping blocks 182 are installed at the upper ends of both clamping rods 163, and a clamping groove 181 is formed on one side of the rubber block 18 above the L-shaped clamping rod 163; a clamping block 182 that matches the clamping groove 181 is fixedly connected to one side of the rubber block 18 above the I-shaped clamping rod 163. In the initial state, the L-shaped clamping rod 163 and the I-shaped clamping rod 163 are in contact with each other, so that the two clamping rods 163 are clamped by the clamping blocks 182 and the clamping grooves 181. Therefore, during the upward movement of the L-shaped clamping rod 163, the L-shaped clamping rod 163 will push the clamping block 182 through the inner wall of the clamping groove 181 to drive the I-shaped clamping rod 163 to rise synchronously, so that the two clamping rods 163 both extend out of the strip-shaped groove 162 and are in sliding contact with the inner wall of the valve body until the limiting plate 16 drives the clamping rod 163 to the welding joint of the valve body. At this time, the two clamping rods 163 extend out of the welding joint of the valve body. Then, control the electro-hydraulic push rod 17 to contract, so that the electro-hydraulic push rod 17 adsorbs the limiting plate 16 to extend out of the valve body through the magnet 171. Since the clamping rod 163 is inserted into the welding joint of the valve body, during the movement of the limiting plate 16 driving the clamping rod 163, the clamping rod 163 is blocked by the inner wall of the welding joint of the valve body, so that the limiting plate 16 cannot move further. As the electro-hydraulic push rod 17 continues to contract, the electro-hydraulic push rod 17 is separated from the sliding plate 168.

[0036] Since an annular groove 167 is formed on the surface of the I-shaped clamping rod 163, when the annular groove 167 on the surface of the I-shaped clamping rod 163 is aligned with the strip-shaped groove 162, the I-shaped clamping rod 163 is in transverse sliding connection with the strip-shaped groove 162. Since the I-shaped clamping rod 163 is connected to the strip-shaped groove 162 through the first spring 164, and in the initial state, the first spring 164 is in a stretched state, when the I-shaped clamping rod 163 is in transverse sliding connection with the strip-shaped groove 162, the first spring 164 pulls the I-shaped clamping rod 163 to slide along the strip-shaped groove 162 in a direction away from the L-shaped clamping rod 163 until the I-shaped clamping rod 163 contacts the welding joint of the valve body, so that the two clamping rods 163 clamp the welding joint of the valve body.

[0037] Before the tightening rod 163 reaches the welding interface of the valve body, the user first slips the port to be welded over the tightening rod 163 so that the port to be welded is aligned with the welding interface of the valve body. When the two tightening rods 163 extend out of the welding interface of the valve body, the L-shaped tightening rod 163 extending out of the welding interface of the valve body contacts the inner wall of the port to be welded, while the I-shaped tightening rod 163 extending out of the welding interface of the valve body is pulled away from the L-shaped tightening rod 163 by the first spring 164 and contacts the inner wall of the port to be welded. Since rubber blocks 18 are installed at the upper ends of the two tightening rods 163, the rubber blocks 18 contact the inner wall of the port to be welded. And because the rubber blocks 18 are made of silicone rubber material, the rubber blocks 18 can be tightened against the inner wall of the port to be welded. Moreover, the friction coefficient of silicone rubber is relatively large, so that the frictional force between the rubber blocks 18 and the inner wall of the port to be welded increases, enabling the tightening rods 163 to be in close contact with the port to be welded. At this time, rotate the screw rod 169 so that the screw rod 169 drives the limit plate 16 to rise until the limit plate 16 contacts the upper surface of the valve body. Since the two tightening rods 163 are inserted into the port to be welded, the tightening rods 163 and the limit plate 16 cooperate to limit the port to be welded at the welding interface of the valve body. When the grinding rod 131 grinds the welding seam between the port to be welded and the welding interface of the valve body, the port to be welded tightened by the tightening rods 163 will not rotate under the frictional action of the grinding rod 131, thus ensuring the stability of the welding position of the port to be welded and improving the quality of laser welding. In addition, the surface of the rubber blocks 18 made of silicone rubber material is sprayed with a heat insulation coating. During the pulsed laser welding process, the heat insulation coating can isolate the heat transferred from the port to be welded to the silicone rubber. Moreover, the rubber blocks 18 made of silicone rubber material also have good heat resistance to ensure that the rubber blocks 18 will not melt during the laser welding process, thus ensuring the service life and use effect of the rubber blocks 18 and ensuring the stable progress of the laser welding process.

[0038] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulsed laser welding device for a mechanical valve body assembly of petroleum equipment, comprising a machine body (1); a workbench (11) is rotatably installed at the upper end of the machine body (1); a mounting frame (12) is fixedly installed at the upper end of the machine body (1); a laser emitter (121) is installed between the mounting frame (12) and the machine body (1); characterized in that: A hydraulic push rod (122) is fixedly installed at the lower end of the mounting bracket (12); one end of the hydraulic push rod (122) away from the mounting bracket (12) is fixedly installed with a mounting plate (123); mounting grooves (124) are formed on both sides of the mounting plate (123); the laser emitter (121) is rotatably installed in the mounting groove (124) on one side of the mounting plate (123); a servo motor (13) is rotatably installed in the mounting groove (124) of the mounting plate (123) away from the laser emitter (121); a grinding rod (131) is installed at the output end of the servo motor (13); a circular groove (14) is formed at the upper end of the workbench (11); a rotating plate (141) is rotatably connected in the circular groove (14); a driving motor (15) is installed inside the machine body (1); the driving motor (15) is used to drive the workbench (11) to rotate; the driving motor (15) and the rotating plate (141) are connected through a driving module; a limiting unit is installed at the upper end of the rotating plate (141); the limiting unit is used to limit the valve body assembly.

2. The pulse laser welding equipment for the mechanical valve body assembly of an oil equipment according to claim 1, characterized in that: An eccentric column (125) is rotatably connected in the mounting groove (124); a rocker (126) is rotatably connected to one side of the mounting plate (123); the rocker (126) is fixedly connected to the eccentric column (125).

3. The pulse laser welding equipment for the mechanical valve body assembly of a petroleum device according to claim 2, characterized in that: A protrusion (127) is fixedly connected to the surface of the eccentric column (125); a hinge plate (128) is rotatably connected in the mounting groove (124); both the laser emitter (121) and the servo motor (13) are fixedly connected to the hinge plate (128); a rubber plate (129) is fixedly connected to the surface of the hinge plate (128); the rubber plate (129) is made of silicone rubber material.

4. A pulsed laser welding device for a mechanical valve body assembly of an oil equipment according to claim 3, characterized in that: The driving module includes a bevel gear ring (111) and a bevel gear shaft (142); the bevel gear shaft (142) is fixedly connected to the rotating plate (141); the bevel gear ring (111) is fixedly connected to the workbench (11); a cavity (112) is formed inside the machine body (1); the driving motor (15) is installed in the cavity (112); a groove (151) is formed at the output end of the driving motor (15); a double-headed bevel gear (152) is slidably and sealingly connected in the groove (151); the double-headed bevel gear (152) is connected to the bottom of the groove (151) through a connecting spring (153); an electromagnetic plate (154) is embedded at the bottom of the groove (151).

5. The pulsed laser welding equipment for a mechanical valve body assembly of an oil equipment according to claim 4, wherein: A square groove (132) is formed at the output end of the servo motor (13); the grinding rod (131) is slidably connected in the square groove (132); the grinding rod (131) is connected to the bottom of the square groove (132) through a fixing spring (133); an electromagnetic sheet (134) is embedded at the bottom of the square groove (132).

6. The pulsed laser welding equipment for a mechanical valve body assembly of an oil equipment according to claim 5, characterized in that: The limiting unit includes a limiting plate (16); a chute (161) is formed on one side of the rotating plate (141); the limiting plate (16) is installed in the chute (161); a strip-shaped groove (162) is formed at the upper end of the limiting plate (16); two abutting rods (163) are slidably connected in the strip-shaped groove (162), and the two abutting rods (163) are respectively arranged in an I shape and an L shape; a first spring (164) is connected between the I-shaped abutting rod (163) and the groove wall of the strip-shaped groove (162); a second spring (165) is connected between the L-shaped abutting rod (163) and the limiting plate (16); an electromagnetic ring (166) is fixedly connected to the lower end of the L-shaped abutting rod (163); an electro-hydraulic push rod (17) connected to the machine body (1) is arranged above the workbench (11); a magnet (171) is embedded on the side of the electro-hydraulic push rod (17) close to the limiting plate (16).

7. A pulsed laser welding device for a mechanical valve body assembly of an oil equipment according to claim 6, characterized in that: Rubber blocks (18) are installed at the upper ends of the two abutting rods (163); a clamping groove (181) is formed on one side of the rubber block (18) above the L-shaped abutting rod (163); a clamping block (182) matched with the clamping groove (181) is fixedly connected to one side of the rubber block (18) above the I-shaped abutting rod (163); the rubber block (18) is made of silicone rubber material; an annular groove (167) is formed on the surface of the I-shaped abutting rod (163).

8. A pulsed laser welding device for a mechanical valve body assembly of an oil equipment, characterized in that: A sliding plate (168) is slidably connected in the chute (161); the limiting plate (16) is in sliding contact with the sliding plate (168); a screw rod (169) is rotatably connected to the upper end of the sliding plate (168); the screw rod (169) is in screw transmission connection with the limiting plate (16).

Images