A welding device for a metal valve housing

Abstract

The application and valve processing equipment technical field, especially related to a kind of metal valve shell welding device.The technical scheme includes: base, the base is respectively provided with welding mechanism, limiting mechanism and the lamination mechanism of gear transmission, installation rod for installing valve is fixed on base, welding mechanism, limiting mechanism and lamination mechanism are mutually matched with valve, the lateral multiple-point locking positioning of valve workpiece is realized by limiting mechanism in the device, effectively prevent workpiece from deviating, rotating in the welding process, then the lamination mechanism driven by gear and rack transmission lamination mechanism drives pressing plate to press tightly valve outer wall, cooperate rotatable auxiliary guide wheel to realize seamless lamination of welding position, while valve can be slightly adjusted in circumferential direction, adapt to annular, special-shaped weld joint processing demand, finally by the screw thread cooperation transmission of welding mechanism, welding frame and welding head are driven to feed smoothly and accurately, along preset trajectory complete continuous welding operation of valve shell weld.

Description

Technical Field

[0001] This invention relates to the field of valve processing equipment technology, specifically to a welding device for the outer shell of a metal valve. Background Technology

[0002] Metal valves are core components in pipeline systems used for opening, closing, and regulating the flow of media. They are widely used in many fields such as water conservancy, chemical industry, power, and petroleum. The welding of the valve shell is a key process in valve manufacturing, and the welding quality directly determines the valve's sealing performance, structural strength, and service life. Currently, existing metal valve shell welding equipment still has many shortcomings in actual processing. Firstly, traditional welding equipment uses a relatively simple single-point clamping method for positioning valve workpieces, resulting in poor clamping stability. During welding, the valve is easily displaced or rotated due to welding vibration and the force of the welding torch, leading to quality problems such as weld misalignment and weld deviation, significantly reducing the product qualification rate. Secondly, existing equipment struggles to achieve a tight fit between the valve shell welding surfaces, easily leaving gaps in the welding area. This results in defects such as incomplete welds, missed welds, and bubbles after welding, severely affecting the weld sealing performance and structural robustness of the valve shell. Thirdly, the welding torch movement structure of conventional welding equipment lacks stability, easily experiencing jamming and deflection during welding feed, resulting in poor welding trajectory accuracy. Furthermore, it cannot adapt to welding special weld seams such as rings and irregular shapes, exhibiting poor equipment versatility. Fourth, traditional processing methods rely heavily on manual calibration, bonding, and positioning, resulting in high levels of human intervention, low processing efficiency, and large human error, making it difficult to meet the demands of large-scale, high-precision valve welding production. Therefore, we propose a metal valve shell welding device to solve the existing problems. Summary of the Invention

[0003] The purpose of this invention is to provide a welding device for the outer shell of a metal valve to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a welding device for the outer shell of a metal valve, comprising a base, a welding mechanism, a limiting mechanism, a mounting rod, a valve, a fitting mechanism, and a fixing frame. The welding mechanism is fixedly connected to one side of the base, a limiting mechanism is provided on the base to the side of the welding mechanism, and a mounting rod is fixedly connected to one side of the base. The valve is detachably mounted on the mounting rod. A fitting mechanism using gear transmission is also provided on one side of the base. The welding mechanism, the limiting mechanism, and the fitting mechanism all cooperate with the valve.

[0005] Preferably, the welding mechanism includes a fixed frame, guide rods, threaded rods, threaded sleeves, a sliding frame, mounting bolts, a welding frame, a first drive motor, and guide rollers. The fixed frame is fixedly connected to the base. Guide rods are symmetrically arranged inside the fixed frame. The first drive motor is fixedly installed on one side of the fixed frame. The output end of the first drive motor extends into the fixed frame and is fixedly connected to the threaded rods. Threaded sleeves are provided on the outside of the threaded rods. A sliding frame is fixedly connected to the outside of the threaded sleeves. Mounting bolts are installed at all four corners of the sliding frame, and guide rollers can be detachably installed through the mounting bolts. The guide rollers roll in cooperation with the guide rods. A welding frame is also fixedly connected to the sliding frame. The fixed frame is welded from rectangular steel tubes, resulting in a robust yet lightweight structure. Two symmetrically arranged guide rods inside utilize high-precision chrome-plated optical shafts with smooth, wear-resistant surfaces, ensuring smooth and unobstructed rolling of the guide rollers. The threaded rod employs a high-precision trapezoidal screw, offering high transmission accuracy, excellent wear resistance, and strong self-locking performance, enabling precise feeding and positioning of the sliding frame. The threaded sleeve and threaded rod are precisely fitted, with minimal clearance and smooth transmission, preventing wobbling during movement. The sliding frame is made of stamped aluminum alloy sheet, resulting in a lightweight yet high-strength design. The four corner guide rollers are detachably connected via mounting bolts for easy maintenance and replacement. The guide rollers are made of polyurethane, ensuring precise rolling contact with the guide rods while reducing operating noise and wear. The welding frame carries the welding head, allowing adjustment of its height, angle, and extension length to suit different valve specifications. The primary drive motor is a servo motor, precisely controlling speed, direction, and feed distance to achieve uniform, precise, and stable feeding of the welding head.

[0006] Preferably, the limiting mechanism includes a mounting frame, a rotating component, an auxiliary positioning frame, a first telescopic cylinder, a telescopic rod, a connecting component, a fixing plate, positioning holes, a positioning frame, a positioning rod, a handle, a driving component, and an auxiliary frame. The mounting frame is fixedly connected to both sides of the base. The rotating component is mounted on the mounting frame and the auxiliary positioning frame is hinged through the rotating component. A fixing plate is fixedly provided at the end of the auxiliary positioning frame away from the mounting frame, and a plurality of positioning holes are equidistantly provided on the fixing plate.

[0007] Preferably, a first telescopic cylinder is hinged to the side of the base near the mounting frame. The output end of the first telescopic cylinder is fixedly connected to a telescopic rod. A connecting piece is fixedly assembled at the end of the telescopic rod. The telescopic rod is hinged to the auxiliary positioning frame through the connecting piece for transmission. The first telescopic cylinder is a pneumatic telescopic cylinder, which is stable in operation and provides uniform thrust. The telescopic speed and thrust can be controlled by adjusting the air pressure, making it suitable for valve workpieces of different weights. The telescopic rod and the first telescopic cylinder are connected in a sealed manner to avoid air leakage affecting transmission efficiency. The surface of the telescopic rod is treated with rust prevention to extend its service life. The connecting parts adopt a universal hinge structure, which can adapt to the angle changes during the rotation of the auxiliary positioning frame, ensuring that there is no jamming or jamming during the transmission process, and realizing stable transmission between the first telescopic cylinder and the auxiliary positioning frame.

[0008] Preferably, a positioning frame is detachably installed in the positioning hole, a positioning rod is movably inserted inside the positioning frame, a handle is hinged to one side of the positioning frame, a driving component is movably connected to the handle, and the end of the driving component away from the handle is hinged to the positioning rod.

[0009] Preferably, the bonding mechanism includes a bonding frame, a movable rod, a drive wheel, a second telescopic cylinder, a transmission rack, a rotating rack, a pressure plate, an auxiliary guide wheel, and a second drive motor. The bonding frame is symmetrically fixedly installed on the base, and the movable rod is symmetrically and movably assembled inside the bonding frame. The drive wheel is fixedly sleeved on the movable rod, and the second telescopic cylinder is fixedly connected below the bonding frame. The output end of the second telescopic cylinder is fixedly connected to the transmission rack, and the transmission rack meshes with the drive wheel gear.

[0010] Preferably, the bonding frame has a concave structure, with rotating racks movably mounted on both sides of the bonding frame. A pressure plate is fixedly connected to the rotating rack, and an auxiliary guide wheel is mounted on the pressure plate. The rotating rack is driven by the drive wheel.

[0011] Preferably, the drive wheel and the rotating rack mesh with each other, and a second drive motor is fixedly installed on one side of the pressure plate, with the output end of the second drive motor fixedly connected to the auxiliary guide wheel.

[0012] Preferably, the auxiliary guide wheel cooperates with the outer wall of the valve.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. Start the first drive motor. The motor drives the threaded rod to rotate, which drives the outer threaded sleeve to make linear reciprocating motion. The threaded sleeve drives the sliding frame to move as a whole. The guide rollers at the four corners of the sliding frame roll along the guide rods in the fixed frame to ensure that the sliding frame moves smoothly without jamming or deflection. The welding frame fixed on the sliding frame feeds synchronously with the sliding frame. The welding frame carries the welding head and moves along the preset trajectory to continuously weld the weld seam of the valve shell.

[0014] 2. The first telescopic cylinders on both sides of the base extend, pushing the telescopic rod and connecting parts to move, causing the auxiliary positioning frame to rotate and swing around the rotating parts, so that the fixing plate at the end of the auxiliary positioning frame is close to the valve. The positioning frame is installed in the corresponding positioning hole of the fixing plate. The handle is turned to drive the positioning rod to extend through the drive component, pressing against the outer wall of the valve, and locking and positioning the valve from the side at multiple points to prevent the workpiece from shifting or rotating during the welding process.

[0015] 3. Start the second telescopic cylinder. Its output end drives the transmission rack to move linearly. The transmission rack meshes with the drive wheel gear. The drive wheel rotates with the transmission rack. The drive wheel further meshes with the rotating rack, driving the two sets of rotating racks to move synchronously. This causes the pressure plate fixed on it to move closer to and press against the outer wall of the valve. Start the second drive motor to drive the auxiliary guide wheel to rotate. The auxiliary guide wheel rolls tightly against the outer wall of the valve, ensuring a seamless fit at the welded part and assisting in small circumferential adjustments to the valve, adapting to the welding requirements of circumferential and irregular weld seams.

[0016] 4. This device achieves fully automated operation of valve clamping, positioning, fitting, and welding through the coordinated cooperation of limiting mechanism, fitting mechanism, and welding mechanism. It greatly reduces manual intervention, reduces labor intensity and operation error. The running speed, clamping force, and feed distance of each mechanism can be quickly adjusted to adapt to the welding of metal valves of different specifications and materials. The equipment changeover time is short, enabling continuous and large-scale production, and significantly improving the stability of welding quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the welding mechanism in this invention; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction; Figure 4 This is a schematic diagram of the limiting mechanism in this invention; Figure 5 This is a schematic diagram illustrating the fit between the mounting rod and the valve in this invention; Figure 6 This is a schematic diagram of the bonding mechanism in this invention.

[0018] In the diagram: 1. Base; 2. Welding mechanism; 201. Fixing frame; 202. Guide rod; 203. Threaded rod; 204. Threaded sleeve; 205. Sliding frame; 206. Mounting bolt; 207. Welding frame; 208. First drive motor; 209. Guide roller; 3. Limiting mechanism; 301. Mounting frame; 302. Rotating component; 303. Auxiliary positioning frame; 304. First telescopic cylinder; 305. Telescopic rod; 306. Connecting component; 307. 1. Fixed plate; 308. Positioning hole; 309. Positioning frame; 310. Positioning rod; 311. Handle; 312. Driving component; 313. Auxiliary frame; 4. Mounting rod; 5. Valve; 6. Fitting mechanism; 601. Fitting frame; 602. Movable rod; 603. Drive wheel; 604. Second telescopic cylinder; 605. Transmission rack; 606. Rotating rack; 607. Pressure plate; 608. Auxiliary guide wheel; 609. Second drive motor; 7. Fixed frame. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0020] like Figures 1-6 As shown, the present invention proposes a welding device for the outer shell of a metal valve, comprising a base 1, a welding mechanism 2, a limiting mechanism 3, a mounting rod 4, a valve 5, a bonding mechanism 6, and a fixing frame 7. The welding mechanism 2 is fixedly connected to one side of the base 1, and the limiting mechanism 3 is provided on one side of the base 1 located on the welding mechanism 2. The mounting rod 4 is fixedly connected to one side of the base 1, and the valve 5 is detachably mounted on the mounting rod 4. The bonding mechanism 6, which adopts gear transmission, is also provided on one side of the base 1. The welding mechanism 2, the limiting mechanism 3, and the bonding mechanism 6 all cooperate with the valve 5.

[0021] In an optional embodiment, the welding mechanism 2 includes a fixed frame 201, a guide rod 202, a threaded rod 203, a threaded sleeve 204, a sliding frame 205, mounting bolts 206, a welding frame 207, a first drive motor 208, and guide rollers 209. The fixed frame 201 is fixedly connected to the base 1. The guide rods 202 are symmetrically arranged inside the fixed frame 201. The first drive motor 208 is fixedly installed on one side of the fixed frame 201. The output end of the first drive motor 208 extends into the fixed frame 201 and is fixedly connected to the threaded rod 203. The threaded sleeve 204 is provided on the outside of the threaded rod 203. The sliding frame 205 is fixedly connected to the outside of the threaded sleeve 204. Mounting bolts 206 are installed at each of the four corners of the sliding frame 205. The guide rollers 209 can be detachably installed through the mounting bolts 206. The guide rollers 209 roll with the guide rods 202. The welding frame 207 is also fixedly connected to the sliding frame 205. The first drive motor 208 is started, which drives the threaded rod 203 to rotate, driving the outer threaded sleeve 204 to perform linear reciprocating motion. The threaded sleeve 204 drives the sliding frame 205 to move as a whole. The guide rollers 209 at the four corners of the sliding frame roll along the guide rods 202 inside the fixed frame 201 to ensure that the sliding frame moves smoothly without jamming or deflection. The welding frame 207 fixed on the sliding frame 205 is fed synchronously with the sliding frame. The welding frame carries the welding head and moves along the preset trajectory to continuously weld the weld seam of the valve 5 shell.

[0022] In an optional embodiment, the limiting mechanism 3 includes a mounting frame 301, a rotating component 302, an auxiliary positioning frame 303, a first telescopic cylinder 304, a telescopic rod 305, a connecting component 306, a fixing plate 307, a positioning hole 308, a positioning frame 309, a positioning rod 310, a handle 311, a driving component 312, and an auxiliary frame 313. The mounting frame 301 is fixedly connected to both sides of the base 1. The rotating component 302 is mounted on the mounting frame 301 and the auxiliary positioning frame 303 is hinged through the rotating component 302. A fixing plate 307 is fixedly provided at one end of the auxiliary positioning frame 303 away from the mounting frame 301. A plurality of positioning holes 308 are equally spaced on the fixing plate 307.

[0023] In an optional embodiment, a first telescopic cylinder 304 is hinged to the side of the base 1 near the mounting bracket 301. The output end of the first telescopic cylinder 304 is fixedly connected to a telescopic rod 305. A connector 306 is fixedly assembled at the end of the telescopic rod 305. The telescopic rod 305 is hinged to the auxiliary positioning bracket 303 through the connector 306.

[0024] In an optional embodiment, a positioning frame 309 is detachably installed in the positioning hole 308, a positioning rod 310 is movably inserted inside the positioning frame 309, a handle 311 is hinged to one side of the positioning frame 309, a driving member 312 is movably connected to the handle 311, and the end of the driving member 312 away from the handle 311 is hinged to the positioning rod 310. The first telescopic cylinders 304 on both sides of the base 1 extend, pushing the telescopic rod 305 and the connecting piece 306 to move, causing the auxiliary positioning frame 303 to rotate and swing around the rotating piece 302, so that the fixing plate 307 at the end of the auxiliary positioning frame 303 is close to the valve 5. The positioning frame 309 is installed in the positioning hole 308 corresponding to the fixing plate 307. The handle 311 is turned and the positioning rod 310 is pushed out through the drive piece 312 to press against the outer wall of the valve 5, thereby locking and positioning the valve from the side at multiple points to prevent the workpiece from shifting or rotating during the welding process.

[0025] In an optional embodiment, the bonding mechanism 6 includes a bonding frame 601, a movable rod 602, a drive wheel 603, a second telescopic cylinder 604, a transmission rack 605, a rotating rack 606, a pressure plate 607, an auxiliary guide wheel 608, and a second drive motor 609. The bonding frame 601 is symmetrically fixedly installed on the base 1. The movable rod 602 is symmetrically and movably assembled inside the bonding frame 601. The drive wheel 603 is fixedly sleeved on the movable rod 602. The second telescopic cylinder 604 is fixedly connected below the bonding frame 601. The output end of the second telescopic cylinder 604 is fixedly connected to the transmission rack 605. The transmission rack 605 meshes with the drive wheel 603.

[0026] In an optional embodiment, the bonding frame 601 has a concave structure, and rotating racks 606 are movably mounted on both sides of the bonding frame 601. A pressure plate 607 is fixedly connected to the rotating rack 606, and an auxiliary guide wheel 608 is mounted on the pressure plate 607. The rotating rack 606 is in transmission cooperation with the drive wheel 603.

[0027] In an optional embodiment, the drive wheel 603 and the rotating rack 606 mesh with each other, and a second drive motor 609 is fixedly installed on one side of the pressure plate 607. The output end of the second drive motor 609 is fixedly connected to the auxiliary guide wheel 608.

[0028] In an optional embodiment, the auxiliary guide wheel 608 cooperates with the outer wall of the valve 5; The second telescopic cylinder 604 is activated, and its output end drives the transmission rack 605 to move linearly. The transmission rack 605 meshes with the drive wheel 603, and the drive wheel 603 rotates with the transmission rack 605. The drive wheel 603 further meshes with the rotating rack 606, driving the two sets of rotating racks to move synchronously, causing the pressure plate 607 fixed on it to move closer to and press against the outer wall of the valve 5. The second drive motor 609 is activated, driving the auxiliary guide wheel 608 to rotate. The auxiliary guide wheel 608 rolls tightly against the outer wall of the valve 5, ensuring a seamless fit at the welded parts and assisting in small circumferential adjustments to the valve, adapting to the welding requirements of annular and irregular welds.

[0029] The working principle of this invention is as follows: When using this device, the valve 5 to be welded is detachably mounted on the mounting rod 4 of the base 1 to complete the initial placement of the workpiece. The first telescopic cylinders 304 on both sides of the base 1 extend and push the telescopic rod 305 and the connecting piece 306 to move, causing the auxiliary positioning frame 303 to rotate and swing around the rotating piece 302, so that the fixing plate 307 at the end of the auxiliary positioning frame 303 is close to the valve 5. The positioning frame 309 is installed in the positioning hole 308 corresponding to the fixing plate 307. The handle 311 is turned and the positioning rod 310 is pushed out through the drive piece 312 to press against the outer wall of the valve 5, thereby locking and positioning the valve from the side at multiple points to prevent the workpiece from shifting or rotating during the welding process. The second telescopic cylinder 604 is activated, and its output end drives the transmission rack 605 to move linearly. The transmission rack 605 meshes with the drive wheel 603, and the drive wheel 603 rotates with the transmission rack 605. The drive wheel 603 further meshes with the rotating rack 606, driving the two sets of rotating racks to move synchronously, so that the pressure plate 607 fixed on it moves closer to and presses against the outer wall of the valve 5. The second drive motor 609 is activated, driving the auxiliary guide wheel 608 to rotate. The auxiliary guide wheel 608 rolls close to the outer wall of the valve 5, which not only ensures seamless fitting of the welding part, but also assists in small circumferential fine adjustment of the valve, adapting to the welding requirements of annular and irregular weld seams. The first drive motor 208 is started, which drives the threaded rod 203 to rotate, driving the outer threaded sleeve 204 to perform linear reciprocating motion. The threaded sleeve 204 drives the sliding frame 205 to move as a whole. The guide rollers 209 at the four corners of the sliding frame roll along the guide rods 202 inside the fixed frame 201 to ensure that the sliding frame moves smoothly without jamming or deflection. The welding frame 207 fixed on the sliding frame 205 is fed synchronously with the sliding frame. The welding frame carries the welding head and moves along the preset trajectory to continuously weld the weld seam of the valve 5 shell. The first drive motor 208 reverses, driving the welding frame 207 to reset to its initial position, stopping the welding process. The second telescopic cylinder 604 retracts, driving the pressure plate 607 and auxiliary guide wheel 608 away from the valve 5 through rack and pinion transmission, releasing the outer wall from the pressing state. The welded valve 5 is then manually removed from the mounting rod 4 and the next set of workpieces to be processed is installed, entering the next round of welding cycle.

[0030] It should be understood that the specific embodiments described above are for illustrative purposes or to explain the principles of the invention, and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A welding device for the outer shell of a metal valve, characterized in that: The device includes a base (1), a welding mechanism (2), a limiting mechanism (3), a mounting rod (4), a valve (5), a bonding mechanism (6), and a fixing frame (7). The welding mechanism (2) is fixedly connected to one side of the base (1). The limiting mechanism (3) is provided on one side of the base (1) near the welding mechanism (2). The mounting rod (4) is fixedly connected to one side of the base (1). The valve (5) is detachably installed on the mounting rod (4). The bonding mechanism (6) using gear transmission is also provided on one side of the base (1). The welding mechanism (2), the limiting mechanism (3), and the bonding mechanism (6) all cooperate with the valve (5).

2. The metal valve housing welding device according to claim 1, characterized in that: The welding mechanism (2) includes a fixed frame (201), a guide rod (202), a threaded rod (203), a threaded sleeve (204), a sliding frame (205), mounting bolts (206), a welding frame (207), a first drive motor (208), and guide rollers (209). The fixed frame (201) is fixedly connected to the base (1). The guide rods (202) are symmetrically arranged inside the fixed frame (201). The first drive motor (208) is fixedly installed on one side of the fixed frame (201). The output end of the rod extends into the fixed frame (201) and is fixedly connected to the threaded rod (203). The threaded rod (203) is fitted with a threaded sleeve (204) on the outside. The sliding frame (205) is fixedly connected to the outside of the threaded sleeve (204). The four corners of the sliding frame (205) are equipped with mounting bolts (206), and the guide rollers (209) can be detachably installed through the mounting bolts (206). The guide rollers (209) are in rolling cooperation with the guide rod (202). The sliding frame (205) is also fixedly connected to the welding frame (207).

3. The metal valve housing welding device according to claim 1, characterized in that: The limiting mechanism (3) includes a mounting frame (301), a rotating component (302), an auxiliary positioning frame (303), a first telescopic cylinder (304), a telescopic rod (305), a connecting component (306), a fixing plate (307), a positioning hole (308), a positioning frame (309), a positioning rod (310), a handle (311), a driving component (312), and an auxiliary frame (313). The mounting frame (301) is fixedly connected to both sides of the base (1). The rotating component (302) is mounted on the mounting frame (301), and the auxiliary positioning frame (303) is hinged through the rotating component (302). A fixing plate (307) is fixedly provided at one end of the auxiliary positioning frame (303) away from the mounting frame (301). Several positioning holes (308) are equally spaced on the fixing plate (307).

4. The metal valve housing welding device according to claim 3, characterized in that: The base (1) is hinged to a first telescopic cylinder (304) on the side near the mounting frame (301). The output end of the first telescopic cylinder (304) is fixedly connected to a telescopic rod (305). The end of the telescopic rod (305) is fixedly assembled with a connector (306). The telescopic rod (305) is hinged to the auxiliary positioning frame (303) through the connector (306).

5. The metal valve housing welding device according to claim 4, characterized in that: A positioning frame (309) can be detachably installed in the positioning hole (308). A positioning rod (310) is movably inserted inside the positioning frame (309). A handle (311) is hinged to one side of the positioning frame (309). A driving component (312) is movably connected to the handle (311). The end of the driving component (312) away from the handle (311) is hinged to the positioning rod (310).

6. The metal valve shell welding device according to claim 1, characterized in that: The bonding mechanism (6) includes a bonding frame (601), a movable rod (602), a drive wheel (603), a second telescopic cylinder (604), a transmission rack (605), a rotating rack (606), a pressure plate (607), an auxiliary guide wheel (608), and a second drive motor (609). The bonding frame (601) is symmetrically fixedly installed on the base (1). The movable rod (602) is symmetrically and movably assembled inside the bonding frame (601). The drive wheel (603) is fixedly sleeved on the movable rod (602). The second telescopic cylinder (604) is fixedly connected below the bonding frame (601). The output end of the second telescopic cylinder (604) is fixedly connected to the transmission rack (605). The transmission rack (605) meshes with the drive wheel (603).

7. The metal valve housing welding device according to claim 6, characterized in that: The bonding frame (601) has a concave structure. Rotating racks (606) are movably mounted on both sides of the bonding frame (601). A pressure plate (607) is fixedly connected to the rotating rack (606). An auxiliary guide wheel (608) is mounted on the pressure plate (607). The rotating rack (606) is in transmission cooperation with the drive wheel (603).

8. The metal valve housing welding device according to claim 7, characterized in that: The drive wheel (603) meshes with the rotating rack (606) in gear engagement. A second drive motor (609) is fixedly installed on one side of the pressure plate (607), and the output end of the second drive motor (609) is fixedly connected to the auxiliary guide wheel (608).

9. The metal valve housing welding device according to claim 8, characterized in that: The auxiliary guide wheel (608) cooperates with the outer wall of the valve (5).

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