A check valve shell welding device

Abstract

The present invention relates to the field of welding technology, and more specifically discloses a check valve shell welding device, including a movable slide, which is mirror-mounted on a guide rail of a bracket base, an auxiliary bracket is installed in the middle of the bracket base, and the check valve shell is placed on the auxiliary bracket. The movable slide includes a movable base, and the movable base is composed of a sliding frame and a circular guide seat. A welding assembly is installed on the circular guide seat, and a central axis is fixedly connected to the side of the circular guide seat, a rotating groove is provided on the central axis, a plurality of sliding square grooves and sliding holes are provided on the central axis, and a straight hole is provided in the middle; the present invention is conducive to the spherical light plate collecting bidirectional light information by providing an optical component, the information processing unit determines the offset direction and offset amount according to the light irradiation position, the control unit controls the synchronous movement of multiple telescopic rods, and controls the inclination angle of the optical component on the central flat groove to make the bidirectional light overlap and complete the straightness adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and more particularly to a check valve shell welding device. Background Art

[0002] A check valve is a valve whose primary function is to allow fluid to flow freely in one direction while blocking or restricting fluid flow in the reverse direction. It is commonly used to prevent backflow or reverse flow, protecting piping systems and equipment. As a crucial component of piping systems, check valves ensure that fluid flows in the intended direction, maintaining system stability and safety. During the manufacturing process, the check valve housing must be welded to the flange.

[0003] Chinese invention patent publication number CN118455810A discloses a check valve housing welding device, belonging to the field of valve body welding technology. The device includes a base device, on which are provided a moving device, a clamping device, and an operating device. The moving device is used to place the check valve housing and flange to be welded, the clamping device is used to drive the flange and the check valve housing to rotate, and the operating device is used to weld the check valve housing and the flange. The check valve housing placed on the moving device provided by the present invention can be rotated, and the flange and the check valve housing can be automatically docked by a docking mechanism. The adjustment mechanism provided by the present invention can weld check valve housings of different diameters. By adjusting the adjustment mechanism, check valve housings of different widths can be welded. The adjustment mechanism can assemble flanges of different diameters, and has wide adaptability.

[0004] It can be seen that the current flange welding of the check valve is usually done by clamping the flanges on both sides and then directly connecting them with the middle and then welding them. There is no good and precise control over parameters such as the flatness of the flange, which requires subsequent processes such as grinding and secondary hole repairing for precise processing. This control method undoubtedly increases the complexity of the process flow and cannot effectively and accurately control and adjust parameter information such as the straightness and verticality between the flange and the valve body shell during clamping. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a check valve housing welding device to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a check valve housing welding device, comprising a movable slide, wherein the movable slide is mirror-mounted on a guide rail of a bracket base, an auxiliary bracket is mounted in the middle of the bracket base, and the check valve housing is placed on the auxiliary bracket, the movable slide comprises a movable base, the movable base is composed of a sliding frame and a circular guide seat, a welding assembly is mounted on the circular guide seat, a central axis is fixedly connected to the side of the circular guide seat, a rotating groove is provided on the central axis, a plurality of sliding square grooves and sliding holes are provided on the central axis, a linear hole is provided in the middle, a flange adjustment assembly is mounted in the sliding square groove, a center positioning frame is mounted in the sliding hole, an optical assembly is mounted in the linear hole, and a valve body flange is placed on the flange adjustment assembly;

[0007] Furthermore, an information adjustment system is installed inside the movable slide, and the information adjustment system includes an information collection unit, an information processing unit and a control unit. The information collection unit is composed of multiple sensors, including a horizontal position sensor and a center position sensor installed inside the flange bracket, and a pressure sensor at the bottom of the flange bracket. The horizontal position sensor is used to collect the point information of a single flange bracket. The information processing unit determines the plane position of the valve body flange through the point information, compares the parallel difference between the two planes, and controls the rotation of the threaded rod through the control unit to control the horizontal movement of the flange bracket to adjust the parallelism of the two planes.

[0008] Furthermore, the information collection unit also includes a spherical light plate, which collects bidirectional light information. The information processing unit determines the offset direction and offset amount through the light irradiation position. The control unit controls the synchronous movement of multiple telescopic rods, controls the inclination angle of the optical component on the center flat groove, makes the bidirectional light coincide, and determines that the optical components on both sides of the check valve housing are in a straight state, completing the straightness adjustment. At this time, the mid-position sensor collects the center position information of the optical component, determines the angle between it and the plane where the three-point position is located, and the control unit controls the rotation of multiple threaded rods again so that the plane where the valve body flange is located is perpendicular to the straight line where the optical component is located, thereby ensuring the perpendicularity of the center axis of the check valve housing and the planes on both sides of the valve body flange.

[0009] Furthermore, the welding assembly includes a welding bracket and a circular ring, a circumferential gear and an arc-shaped positioning frame are installed on the side of the welding bracket, a motor is installed on the side of the circumferential gear, the motor drives the circumferential gear to rotate, and the arc-shaped positioning frame consists of an arc plate and a round rod, the arc plate is installed on the mobile base, and the round rod is sleeved and installed inside the circumferential gear.

[0010] Furthermore, the flange adjustment assembly includes a flange bracket, the upper surface of the flange bracket is composed of a supporting surface, a blocking surface and a placement inclined surface, the valve body flange is placed on the supporting surface through the placement inclined surface, a sliding groove is opened on the side of the flange bracket, the buffer plate and the positioning push plate are installed inside the sliding groove, a buffer spring is installed inside the buffer plate, a threaded rod is installed inside the positioning push plate, the side of the threaded rod is connected to the motor, a telescopic rod is installed at the bottom of the flange bracket, the telescopic rod is fixedly installed at the bottom of the sliding square groove, the bottom of the telescopic rod is in contact with the center flat groove, and multiple telescopic rods are synchronously controlled.

[0011] Furthermore, the center positioning frame includes a positioning main rod, a second spring is installed on the outside of the positioning main rod, a baffle is fixedly connected to the middle of the positioning main rod, an air pressure groove is opened at the bottom of the baffle, and an insertion rod is fixedly connected to the bottom of the baffle, and the insertion rod is installed on the arc bracket.

[0012] Furthermore, an air pump is installed at the bottom of the sliding hole, and the air cavities of the multiple air pressure grooves are interconnected. The air pressure enters the interior of the air pressure grooves to push the positioning main rod to move outward.

[0013] Furthermore, the optical component includes an adjusting rod, one end of which is fixedly connected to a spherical light panel, a light groove is provided inside the adjusting rod and the spherical light panel, a light-emitting element is installed inside the light groove, a positioning support groove and a center flat groove are provided on the outside of the adjusting rod, the telescopic rod is installed on the outside of the center flat groove, and the arc-shaped bracket is installed on the outside of the positioning support groove.

[0014] Furthermore, the circular collar includes two collars and a connecting rod, the circumferential gear is sleeved on the collar, and the other end of the circular collar is sleeved on the rotating groove.

[0015] The technical effects and advantages of the present invention are as follows:

[0016] 1. This invention incorporates an optical assembly that facilitates the collection of bidirectional light information by the spherical light panel. An information processing unit determines the direction and amount of offset based on the light's illumination position. A control unit controls the synchronous movement of multiple telescopic rods, controlling the inclination of the optical assembly on the central flat groove to ensure alignment of the bidirectional light beams, thereby achieving straightness adjustment.

[0017] 2. The present invention incorporates a flange adjustment assembly, which facilitates the control unit controlling the rotation of multiple threaded rods to perpendicularly position the plane of the valve body flange and the line of sight of the optical assembly. This ensures the perpendicularity of the central axis of the check valve housing and the planes on both sides of the valve body flange, enabling precise control of welding parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of A in the figure.

[0020] Figure 3 This is a schematic diagram of the assembly of the movable slide structure of the present invention.

[0021] Figure 4 It is a schematic diagram of the movable slide structure of the present invention.

[0022] Figure 5 It is a structural schematic diagram of the flange adjustment assembly of the present invention.

[0023] Figure 6 It is a structural schematic diagram of the center positioning frame of the present invention.

[0024] Figure 7 Schematic diagram of the optical component structure of the present invention.

[0025] Figure 8 It is a schematic flow chart of the welding process of the present invention.

[0026] The accompanying drawings are marked as follows: 1. Moving slide; 101. Moving base; 102. Central axis; 103. Rotating groove; 104. Rotating tooth groove; 105. Sliding square groove; 106. Sliding hole; 107. Linear hole; 2. Check valve housing; 3. Valve body flange; 4. Welding assembly; 401. Welding bracket; 402. Circumferential gear; 403. Welding sub-frame; 404. Arc positioning frame; 405. Circular collar; 5. Flange adjustment assembly; 501. Method Lan bracket; 502, sliding groove; 503, buffer plate; 504, buffer spring; 505, telescopic rod; 506, positioning push plate; 507, threaded rod; 6, center positioning frame; 601, positioning main rod; 602, air pressure groove; 603, arc bracket; 604, second spring; 7, auxiliary bracket; 8, optical component; 801, spherical light panel; 802, positioning support groove; 803, center flat groove; 804, light groove; 9, bracket base. DETAILED DESCRIPTION

[0027] The technical solutions of the present invention will be described clearly and completely below in conjunction with the drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The check valve shell welding device involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Reference Figure 1-Figure 4The present invention provides a check valve shell welding device, comprising a movable slide 1, which is mirror-mounted on a guide rail of a bracket base 9, an auxiliary bracket 7 is mounted in the middle of the bracket base 9, and a check valve shell 2 is placed on the auxiliary bracket 7. The movable slide 1 comprises a movable base 101, which is composed of a sliding frame and a circular guide seat, a welding assembly 4 is mounted on the circular guide seat, a central axis 102 is fixedly connected to the side of the circular guide seat, a rotating groove 103 is provided on the central axis 102, a plurality of sliding square grooves 105 and sliding holes 106 are provided on the central axis 102, a linear hole 107 is provided in the middle, a flange adjustment assembly 5 is mounted inside the sliding square groove 105, a center positioning frame 6 is mounted inside the sliding hole 106, an optical assembly 8 is mounted inside the linear hole 107, and a valve body flange 3 is placed on the flange adjustment assembly 5;

[0029] In this embodiment, it should be specifically explained that: an information adjustment system is installed inside the movable slide 1, and the information adjustment system includes an information collection unit, an information processing unit and a control unit. The information collection unit is composed of multiple sensors, including a horizontal position sensor and a mid-position sensor installed inside the flange bracket 501, and a pressure sensor at the bottom of the flange bracket 501. The horizontal position sensor is used to collect the point position information of a single flange bracket 501. The information processing unit determines the plane position of the valve body flange 3 based on the point position information, compares the parallel difference between the two planes, and controls the rotation of the threaded rod 507 through the control unit to control the horizontal movement of the flange bracket 501 to adjust the parallelism of the two planes.

[0030] The information collection unit also includes a spherical light plate 801, which collects bidirectional light information. The information processing unit determines the offset direction and offset amount by the light irradiation position. The control unit controls the synchronous movement of multiple telescopic rods 505, controls the inclination angle of the optical component 8 on the central flat groove 803, so that the bidirectional light coincides, and determines that the optical components 8 on both sides of the check valve housing 2 are in a straight line state, completing the straightness adjustment. At this time, the mid-position sensor collects the center position information of the optical component 8, determines the angle between it and the plane where the three-point position is located, and the control unit again controls the rotation of multiple threaded rods 507 so that the plane where the valve body flange 3 is located is perpendicular to the straight line where the optical component 8 is located, thereby ensuring the perpendicularity of the center axis of the check valve housing 2 and the planes on both sides of the valve body flange 3.

[0031] The main difference between this embodiment and the prior art is that this embodiment utilizes multi-point support detection and control to realize multi-tolerance information detection and adjustment of the check valve housing 2 and the valve body flange 3, thereby achieving precise control of the welding process, specifically in the flange adjustment assembly 5, the center positioning frame 6, and the optical assembly 8;

[0032] The above structure is the main structure of this embodiment, which solves the problem that the positional relationship between the valve body flange 3 and the check valve housing 2 cannot be accurately determined during the current welding process, and the subsequent inspection and processing procedures are cumbersome. The motor is an existing structure, and the specific structure and connection method of the motor used for the welding component 4 and the flange adjustment component 5 are not described in detail in this embodiment. In addition, the control method of the telescopic rod 505 and the air pressure groove 602 also belongs to the existing technology. Therefore, this application does not make detailed limitations.

[0033] Reference Figure 2 The welding assembly 4 includes a welding bracket 401 and a circular ring 405. A circumferential gear 402 and an arc-shaped positioning frame 404 are installed on the side of the welding bracket 401. A motor is installed on the side of the circumferential gear 402. The motor drives the circumferential gear 402 to rotate. The arc-shaped positioning frame 404 consists of an arc plate and a round rod. The arc plate is installed on the movable base 101, and the round rod is sleeved and installed inside the circumferential gear 402. When the motor drives the circumferential gear 402 to rotate, the arc plate makes the welding sub-frame 403 always face the welding position. The side of the welding bracket 401 is hinged with a welding sub-frame 403, and the welding sub-frame 403 has an elongation and rotation function. The welding control method of the welding sub-frame 403 belongs to the existing technology and is not elaborated in detail in this application.

[0034] In this embodiment, it should be specifically explained that the circular collar 405 includes two collars and a connecting rod, the circumferential gear 402 is sleeved on the collar, and the other end of the circular collar 405 is sleeved on the rotating groove 103 .

[0035] Reference Figure 5 The flange adjustment assembly 5 includes a flange bracket 501. The upper surface of the flange bracket 501 is composed of a supporting surface, a blocking surface and a placement inclined surface. The valve body flange 3 is placed on the supporting surface through the placement inclined surface. A sliding groove 502 is opened on the side of the flange bracket 501. The buffer plate 503 and the positioning push plate 506 are installed inside the sliding groove 502. A buffer spring 504 is installed inside the buffer plate 503. A threaded rod 507 is installed inside the positioning push plate 506. The side of the threaded rod 507 is connected to the motor. A telescopic rod 505 is installed at the bottom of the flange bracket 501. The telescopic rod 505 is fixedly installed at the bottom of the sliding square groove 105. The bottom of the telescopic rod 505 is installed in contact with the center flat groove 803. Multiple telescopic rods 505 are synchronously controlled.

[0036] In this embodiment, it should be specifically explained that the synchronous control in this application is a multi-line control combined with plane information, rather than making multiple motors rotate the same angle value. After the plane angle difference between the two valve body flanges 3 is calculated, the motor controls the threaded rod 507 to rotate, and the positioning push plate 506 pushes the flange bracket 501 to move, adjusts the position angle of the valve body flange 3, and completes the parallelism adjustment of the valve body flange 3.

[0037] Reference Figure 6 The central positioning frame 6 includes a positioning main rod 601, a second spring 604 is installed on the outside of the positioning main rod 601, a baffle is fixedly connected to the middle of the positioning main rod 601, an air pressure groove 602 is opened at the bottom of the baffle, and an insertion rod is fixedly connected to the bottom of the baffle, and the insertion rod is installed on the arc bracket 603. The arc bracket 603 applies downward pressure on the optical component 8. After ventilation, the air pressure enters the interior of the air pressure groove 602 to push the positioning main rod 601 to move outward. As the pressure increases, the end of the positioning main rod 601 contacts the inner wall of the check valve housing 2 and supports and positions it. Since the pressure between multiple air pressure grooves 602 is the same, the positioning main rod 601 has the same internal supporting force on the check valve housing 2.

[0038] In this embodiment, it needs to be specifically explained that: after the central axis 102 enters the interior of the check valve housing 2, the valve body flange 3 gradually fits on both sides of the check valve housing 2. After the valve body flange 3 reaches the specified position, the fitting is completed. At this time, the air pump at the bottom of the sliding hole 106 is started, and the air pressure enters the interior of the air pressure groove 602 to push the positioning main rod 601 to move outward. Multiple positioning main rods 601 form multiple support points to fix the interior of the check valve housing 2.

[0039] Reference Figure 7 The optical component 8 includes an adjustment rod, one end of which is fixedly connected to a spherical light plate 801, a light groove 804 is opened inside the adjustment rod and the spherical light plate 801, and a light-emitting element is installed inside the light groove 804. A positioning support groove 802 and a center flat groove 803 are opened on the outside of the adjustment rod, the telescopic rod 505 is installed on the outside of the center flat groove 803, and the arc bracket 603 is installed on the outside of the positioning support groove 802. Multiple arc brackets 603 clamp and fix the positioning support groove 802.

[0040] In this embodiment, it is necessary to specifically explain that: after the inside of the check valve housing 2 is fixed, the light inside the light slot 804 is started. When there is a straightness difference between the axes on both sides, the light from the light slot 804 on one side is irradiated on the spherical light plate 801 on the other side. At this time, the telescopic rod 505 is started to control the flange bracket 501 to move up and down. The three telescopic rods 505 work together to control the expansion and contraction so that the center position of the valve body flange 3 changes. The pressure plate at the bottom of the telescopic rod 505 applies pressure on the central flat groove 803 to adjust its position toward the light until the light on both sides coincides. At this time, the straightness adjustment of the valve body and the flange is completed.

[0041] Working principle of the present invention:

[0042] The main problem solved by this embodiment is: using multi-point support detection and control to realize multi-tolerance information detection and adjustment of the check valve housing 2 and the valve body flange 3, and realizing precise control of the welding process, which solves the current problem that the position relationship between the valve body flange 3 and the check valve housing 2 cannot be accurately determined during the welding process, and the subsequent detection and processing procedures are cumbersome.

[0043] The specific steps are as follows:

[0044] The valve body flange 3 is mirror-mounted on the flange brackets 501 on both sides. Under the supporting effect of the telescopic rod 505 and the pressure sensor, the supporting force of multiple flange brackets 501 is the same. At this time, the check valve housing 2 is placed on the auxiliary bracket 7, and the movable slide 1 is started to move to the middle position. The central axis 102 enters the interior of the check valve housing 2, and the valve body flange 3 gradually fits on both sides of the check valve housing 2. After the valve body flange 3 reaches the specified position, the fitting is completed. At this time, the air pump at the bottom of the sliding hole 106 is started, and the air pressure enters the interior of the air pressure groove 602 to push the positioning main rod 601 to move outward. The multiple positioning main rods 601 form multiple support points to fix the interior of the check valve housing 2;

[0045] After the inside of the check valve housing 2 is fixed, the light inside the light slot 804 is activated. When there is a straightness difference between the two axis centers, the light from the light slot 804 on one side shines on the spherical light plate 801 on the other side. At this time, the telescopic rod 505 is activated to control the flange bracket 501 to move up and down. The three telescopic rods 505 work together to control the expansion and contraction so that the center position of the valve body flange 3 changes. The pressure plate at the bottom of the telescopic rod 505 applies pressure on the central flat groove 803, adjusting its position toward the light until the light on both sides coincides. At this time, the straightness adjustment of the valve body and the flange is completed.

[0046] During this process, the position sensor inside the flange bracket 501 collects the position information of the valve body flange 3, and the position information is transmitted to the information processing unit. The plane information of the valve body flange 3 is determined by the multiple position information. After the plane angle difference between the two valve body flanges 3 is calculated, the motor controls the threaded rod 507 to rotate, and the positioning push plate 506 pushes the flange bracket 501 to move, thereby adjusting the position angle of the valve body flange 3 and completing the parallelism adjustment of the valve body flange 3.

[0047] After completing the parallelism and straightness adjustments, the information processing unit calculates the positional relationship between the central axis and the plane using the plane angle information, calculates the verticality deviation, and adjusts the verticality by adjusting the angle position of the valve body flange 3 on both sides.

[0048] After completing the above adjustments, adjust the elongation length and angle of the welding bracket 401 and the welding sub-frame 403 so that the welding sub-frame 403 is in the welding position. At this time, start the motor at the welding bracket 401, and the motor drives the circumferential gear 402 to rotate. Since the circumferential gear 402 is engaged with the rotating tooth groove 104, the welding assembly 4 as a whole performs a circular motion during the welding process, and the weld is welded. During this process, the arc-shaped positioning frame 404 provides directional support for the welding bracket 401 to prevent it from rotating freely under the drive of the motor. The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A check valve housing welding device, comprising a movable slide (1), characterized in that: The movable slide (1) is mirror-mounted on the guide rail of the bracket base (9), an auxiliary bracket (7) is mounted in the middle of the bracket base (9), and the check valve housing (2) is placed on the auxiliary bracket (7). The movable slide (1) includes a movable base (101), the movable base (101) is composed of a sliding frame and a circular guide seat, a welding assembly (4) is mounted on the circular guide seat, a central axis (102) is fixedly connected to the side of the circular guide seat, a rotating groove (103) is provided on the central axis (102), a plurality of sliding square grooves (105) and sliding holes (106) are provided on the central axis (102), a linear hole (107) is provided in the middle, a flange adjustment assembly (5) is mounted inside the sliding square groove (105), a center positioning frame (6) is mounted inside the sliding hole (106), an optical assembly (8) is mounted inside the linear hole (107), and a valve body flange (3) is placed on the flange adjustment assembly (5); The flange adjustment assembly (5) includes a flange bracket (501), the upper surface of the flange bracket (501) is composed of a supporting surface, a blocking surface and a placement inclined surface, the valve body flange (3) is placed on the supporting surface through the placement inclined surface, a sliding groove (502) is opened on the side of the flange bracket (501), a buffer plate (503) and a positioning push plate (506) are installed inside the sliding groove (502), a buffer spring (504) is installed inside the buffer plate (503), a threaded rod (507) is installed inside the positioning push plate (506), the side of the threaded rod (507) is connected to the motor, a telescopic rod (505) is installed at the bottom of the flange bracket (501), the telescopic rod (505) is fixedly installed at the bottom of the sliding square groove (105), the bottom of the telescopic rod (505) is in contact with the central flat groove (803), and the multiple telescopic rods (505) are synchronously controlled; The optical assembly (8) includes an adjustment rod, one end of which is fixedly connected to a spherical light plate (801), a light groove (804) is provided inside the adjustment rod and the spherical light plate (801), a light emitting element is installed inside the light groove (804), a positioning support groove (802) and a central flat groove (803) are provided on the outer side of the adjustment rod, and a telescopic rod (505) is installed on the outer side of the central flat groove (803); An information adjustment system is installed inside the movable slide (1), and the information adjustment system includes an information collection unit, an information processing unit, and a control unit. The information collection unit includes a plurality of sensors, and the plurality of sensors include a horizontal position sensor and a mid-position sensor installed inside the flange bracket (501), and a pressure sensor at the bottom of the flange bracket (501). The horizontal position sensor is used to collect point information of a single flange bracket (501). The information processing unit determines the plane position of the valve body flange (3) based on the point information, compares the parallel difference between the two planes, and controls the rotation of the threaded rod (507) through the control unit to control the horizontal movement of the flange bracket (501) to adjust the parallelism of the two planes. The information collection unit further comprises a spherical light plate (801), which collects bidirectional light information. The information processing unit determines the offset direction and offset amount by the light irradiation position. The control unit controls the synchronous movement of the plurality of telescopic rods (505), controls the inclination angle of the optical component (8) on the central flat groove (803), makes the bidirectional light coincide, determines that the optical components (8) on both sides of the check valve housing (2) are in a straight line state, and completes the straightness adjustment. At this time, the mid-position sensor collects the center position information of the optical component (8), determines the angle between the optical component (8) and the plane where the three-point position is located, and the control unit again controls the rotation of the plurality of threaded rods (507) so that the plane where the valve body flange (3) is located is perpendicular to the straight line where the optical component (8) is located, thereby ensuring the perpendicularity of the central axis of the check valve housing (2) and the planes on both sides of the valve body flange (3).

2. A check valve housing welding device according to claim 1, characterized in that: The welding assembly (4) comprises a welding bracket (401) and a circular collar (405); a circumferential gear (402) and an arc-shaped positioning bracket (404) are mounted on the side of the welding bracket (401); a motor is mounted on the side of the circumferential gear (402); the motor drives the circumferential gear (402) to rotate; the arc-shaped positioning bracket (404) is composed of an arc plate and a round rod; the arc plate is mounted on the mobile base (101); and the round rod is sleeved and mounted inside the circumferential gear (402).

3. A check valve housing welding device according to claim 1, characterized in that: The central positioning frame (6) comprises a positioning main rod (601), a second spring (604) is installed on the outer side of the positioning main rod (601), a baffle is fixedly connected to the middle of the positioning main rod (601), an air pressure groove (602) is opened at the bottom of the baffle, and an insertion rod is fixedly connected to the bottom of the baffle, and the insertion rod is installed on the arc-shaped bracket (603).

4. A check valve housing welding device according to claim 3, characterized in that: An air pump is installed at the bottom of the sliding hole (106), and the air cavities of the multiple air pressure grooves (602) are interconnected. The air pressure enters the interior of the air pressure grooves (602) to push the positioning main rod (601) to move outward.

5. The check valve housing welding device according to claim 3, characterized in that: The arc-shaped bracket (603) is installed on the outside of the positioning support groove (802).

6. A check valve housing welding device according to claim 2, characterized in that: The circular collar (405) comprises two collars and a connecting rod. The circumferential gear (402) is sleeved on one end of the circular collar (405), and the other end of the circular collar (405) is sleeved on the rotating groove (103).

Images