High-precision deviation-preventing ball valve assembly machine and assembly method thereof

Abstract

The invention discloses a high-precision deviation-preventing type ball valve assembling machine and an assembling method thereof, and relates to the field of ball valve assembly.The high-precision deviation-preventing type ball valve assembling machine comprises a base body and a mounting frame, the mounting frame is fixed to the upper portion of the base body, a bearing seat is arranged on the upper portion of the base body, a valve body positioning mechanism is arranged on the upper portion of the bearing seat, and a valve body is positioned; and a mounting disc is arranged above the bearing seat, a second expansion piece is arranged above the mounting disc, the height position of the mounting disc is controlled, and an assembling head is arranged below the mounting disc. According to the high-precision deviation-preventing type ball valve assembling machine, synchronous rotation control over a plurality of mounting bolts can be achieved through the arrangement of the multiple sets of assembling heads, the assembling efficiency is improved, the assembling heads can be detached from the control rod, the using number of the assembling heads and the specifications of the assembling heads can be adjusted according to using requirements, the assembling heads can synchronously and horizontally move, and the assembling efficiency is improved. And the assembly diameter is adjusted, so that the assembly of different ball valves can be adapted.

Description

Technical Field

[0001] The invention relates to the technical field of ball valve assembly, in particular to a high-precision anti-deviation ball valve assembly machine and an assembly method thereof. Background Art

[0002] When assembling the ball valve, the valve core and the housing can be connected and assembled by bolts and other mounting parts. Currently, the assembly of the ball valve is generally done manually, and the mounting bolts are manually tightened, which is relatively inefficient.

[0003] Prior art 1 (application number CN201510953359.5, Chinese patent published on March 9, 2016) A ball valve assembly machine includes a support platform, a slideway is installed on the upper end of the support platform, a sliding plate is installed on the upper part of the slideway, positioning fixtures are installed on the left and right parts of the sliding plate, a driving device is installed on the support platform, a bolt screwing device is installed on the upper end of the support platform, a driven wheel is installed on the right part of the support platform, and a connecting block is fixed on the lower end of the sliding plate. The application has the advantages of compact structural design and easy use, and can realize the automatic assembly of ball valves, replacing manual Assembly, with a high degree of automation, improves the assembly efficiency of the ball valve, saves manpower and material resources, and adopts a double-station design to ensure the assembly quality and assembly efficiency of the ball valve; Prior art 2 (application number is CN201710439945.7, a Chinese patent published on August 4, 2017) A workbench for ball valve assembly, including a stand, on which a valve body clamping device and a cap screwing device are provided, and the cap screwing device includes a driving part, a control part and an output part, and the driving part and the control part form a closed loop so that the cap screwing device constitutes a fixed torque screwing device. In this way, in the process of assembling the ball valve, the tightening installation of the cap can realize mechanical, electrical and pneumatic integrated control, which ensures the quality of ball valve assembly, while reducing the labor intensity of workers and improving production efficiency.

[0004] Although some of the current ball valve assembly machines can realize automatic tightening of bolts, their tightening stations are fixed and can only assemble ball valves of one model and size. When the diameter of the ball valve changes, the installation positions of multiple bolts will also change synchronously. After the change, the assembly machine cannot accurately adapt to the change, which may easily lead to deviations in the bolt docking and affect the assembly efficiency. In addition, due to the different shapes of the valve body, the hole positions after positioning are also easily offset, which is not conducive to subsequent assembly. Summary of the invention

[0005] The object of the present invention is to provide a high-precision anti-deviation ball valve assembly machine and an assembly method thereof, so as to solve the problem raised in the above background technology that although the current ball valve assembly machine can partially realize the automatic tightening of bolts, its tightening station is fixedly set and can only assemble ball valves of one model and size. When the diameter of the ball valve changes, the installation positions of multiple bolts will also change synchronously. After the change, the assembly machine cannot accurately adapt to the change, which easily leads to the problem of deviation in the bolt docking.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-precision anti-bias ball valve assembly machine, comprising a base and a mounting frame, the mounting frame being fixed above the base, a supporting seat being arranged above the base, and a valve body positioning mechanism being arranged above the supporting seat to position the valve body, and a mounting disk being arranged above the supporting seat, a second telescope being arranged above the mounting disk to control the height position of the mounting disk, an assembly head being arranged below the mounting disk, the assembly heads being distributed at equal angles below the mounting disk with the center of the mounting disk as the center of a circle, and a control rod being connected above the assembly head, and a movable block being rotatably connected to the upper end of the control rod, the movable block being located inside the mounting disk and between the mounting disk to form a horizontal sliding structure, a third telescope being connected to the outer side of the movable block, and a synchronous rotation control mechanism being arranged at the upper end of the control rod to synchronously control the rotation of the control rod.

[0007] To further optimize the technical solution, the valve body positioning mechanism includes a positioning block and a first retractor; The positioning blocks are evenly distributed at equal angles with the center of the support seat as the center of the circle; The first telescopic device is installed above the supporting seat and connected to the positioning block to control the movement of the positioning block.

[0008] To further optimize the technical solution, a rotational connection is formed between the support seat and the base, and a first motor is connected below the support seat to control the rotation of the support seat.

[0009] To further optimize the technical solution, a mounting head is provided below the control rod, and a concave-convex matching structure is formed above the mounting head and a mounting piece is passed through the inside of the mounting head, and a threaded connection is formed between the mounting piece and the assembly head to fix the connection between the mounting head and the assembly head.

[0010] To further optimize the technical solution, the synchronous rotation control mechanism includes a torsion spring, a control rope, a control shaft, a first gear, a second gear, a mounting shaft and a transmission mechanism; A torsion spring is installed above the control rod to provide a rotational reset force for the control rod; A control rope, wound around the surface of the control rod; A control shaft is rotatably mounted inside the mounting plate, and the control shaft is connected to a control rope; A first gear, disposed outside the control shaft; A second gear is arranged inside the first gear and meshes with the first gear; A mounting shaft is fixed at the middle of the second gear, and a rotation connection is formed between the mounting shaft and the mounting plate; The transmission mechanism is arranged below the installation shaft to control the rotation of the installation shaft.

[0011] Further optimizing the technical solution, the transmission mechanism includes a drive shaft, a second motor and a connection control mechanism; A driving shaft is arranged below the mounting shaft, and a rotation connection is formed between the driving shaft and the mounting plate; A second motor is disposed below the driving shaft and connected to the driving shaft to control the rotation of the driving shaft; The connection control mechanism is arranged at the connection between the driving shaft and the mounting shaft.

[0012] To further optimize the technical solution, the connection control mechanism includes a docking block, a second spring, a docking groove and a fixing rod; The docking block is arranged above the driving shaft and between the driving shafts to form an up-and-down sliding structure; A second spring is arranged below the docking block to provide an upward thrust to the docking block; The docking groove is arranged below the mounting shaft, and a concave-convex matching structure is formed between the docking groove and the docking block; The fixing rod is arranged above the docking block, and the upper end of the fixing rod penetrates the upper end of the mounting shaft and the upper end of the mounting plate, and the upper end of the fixing rod is fixedly connected to the mounting frame.

[0013] To further optimize the technical solution, a connecting ring is fixed on the surface of the control shaft, a sliding connection is formed between the first gear and the connecting ring, and a friction transmission mechanism is arranged inside the control shaft so that the first gear drives the control shaft to rotate.

[0014] Further optimizing the technical solution, the friction transmission mechanism includes a connecting block, a first spring, an extrusion block, a connecting rod, a control ring and a fourth retractor; A connecting block, disposed inside the control shaft and the control shaft; A first spring, arranged on the outer side of the connecting block to provide thrust for the connecting block; The extrusion block is arranged in the middle of the control shaft, and the surface of the extrusion block is designed to be inclined; A connecting rod is installed above the extrusion block, and the upper part of the connecting rod passes through the upper part of the control shaft and the upper part of the mounting plate; A control circle, arranged above the connecting rod; The fourth retractor is installed above the mounting plate, and the fourth retractor is connected to the control ring to control the vertical movement of the control ring.

[0015] An assembly method of a high-precision anti-bias ball valve assembly machine, the method comprising the following steps: Step 1: Place the ball valve housing to be assembled in the middle of the support seat, center the ball valve through the valve body positioning mechanism, and coincide the vertical center line of the support seat with the vertical center line of the mounting plate. Insert the mounting screw into the valve body hole, and control the number of assembly heads used according to the number of screws installed; Step 2: After the valve body is installed, the horizontal position of the movable block is adjusted through the third telescopic device. The movable block drives the assembly head to move through the control rod, and the assembly diameter of the assembly head is adjusted to adapt to the assembly requirements of the valve body, so that the assembly head and the bolt are accurately connected to improve the assembly accuracy; Step 3: Control the mounting plate to move downward through the second telescopic device so that the assembly head moves downward and connects with the mounting bolts. Then, drive the control rod to rotate through the synchronous rotation control mechanism, so that it drives the assembly head to rotate to perform assembly work. The evenly distributed assembly heads rotate synchronously to improve assembly efficiency.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The synchronous rotation control of multiple mounting bolts can be realized by setting multiple groups of assembly heads, thereby improving assembly efficiency. The assembly heads can be removed from the control rod, and the number of assembly heads used and the specifications of the assembly heads can be adjusted according to usage needs. The assembly heads can also be synchronously moved horizontally to adjust the assembly diameter so that they can adapt to the assembly of different ball valves. The bolt installation position can be adjusted to improve assembly accuracy.

[0017] (2) The positioning block cooperates with the first expansion joint to provide internal support and positioning for the valve body. Since the valve body is a circular structure, the valve body can be kept in the middle of the support seat after support and positioning, thereby improving assembly accuracy and preventing the valve body from shifting during assembly. The support seat can be rotated to adjust the angular position of the mounting bolt so that it is opposite to the assembly head.

[0018] (3) The control rod can be pulled by the control rope to rotate, providing rotation control for the assembly head, and this control method is not affected by the subsequent movement of the movable block. Multiple groups of assembly heads can rotate synchronously before and after the movement of the movable block.

[0019] (4) The connection between the connecting block and the first gear enables the first gear to drive the control shaft to rotate selectively. When the assembly is completed, the first gear continues to rotate and slides on the surface of the connecting block. The control shaft corresponding to the single assembly head that has not been assembled can continue to rotate driven by the first gear.

[0020] (5) The rotation of the mounting shaft is controlled by the connection between the docking block and the docking groove. After the mounting plate is raised, the fixed rod squeezes the docking block to push it out of the docking groove, thereby disconnecting the connection between the drive shaft and the mounting shaft, so that the torsion spring drives the control rod to reset and rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the structure of the mounting plate of the present invention when viewed from above; Figure 3 It is a schematic diagram of the top view structure of the substrate of the present invention; Figure 4 It is a schematic diagram of the main cross-sectional structure of the substrate of the present invention; Figure 5 It is a schematic diagram of the main cross-sectional structure of the assembly head of the present invention; Figure 6 This is a schematic diagram of the main cross-sectional structure of the mounting plate of the present invention; Figure 7 This is a schematic diagram of the top view of the structure of the first gear of the present invention; Figure 8 It is a schematic diagram of the top-sectional structure of the movable block of the present invention; Fig. 9 This is a schematic diagram of the three-dimensional structure of the control shaft of the present invention; Fig.10 This is a schematic diagram of the main cross-sectional structure of the control shaft of the present invention; Fig.11 This is a schematic diagram of the main cross-sectional structure of the installation shaft of the present invention.

[0022] In the figure: 1, base; 2, mounting frame; 3, supporting seat; 4, positioning block; 5, first telescope; 6, first motor; 7, mounting plate; 8, second telescope; 9, assembly head; 10, control rod; 11, movable block; 12, mounting head; 13, mounting piece; 14, third telescope; 15, torsion spring; 16, control rope; 17, control shaft; 1701, connecting ring; 18, first gear; 19, second gear; 20, mounting shaft; 21, driving shaft; 22, second motor; 23, connecting block; 24, first spring; 25, extrusion block; 26, connecting rod; 27, control circle; 28, fourth telescope; 29, docking block; 30, second spring; 31, docking groove; 32, fixing rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 11 , the present invention provides the following technical solutions: a high-precision anti-deflection ball valve assembly machine, comprising a base 1 and a mounting frame 2, the mounting frame 2 being fixed above the base 1; Embodiment 1: The present invention provides the following technical solution, which discloses that a supporting seat 3 is arranged above the base 1, and a valve body positioning mechanism is arranged above the supporting seat 3 to position the valve body, and a mounting disk 7 is arranged above the supporting seat 3, and a second telescope 8 is arranged above the mounting disk 7 to control the height position of the mounting disk 7, and an assembly head 9 is arranged below the mounting disk 7, and the assembly heads 9 are distributed at equal angles below the mounting disk 7 with the center of the mounting disk 7 as the center of a circle, and a control rod 10 is connected above the assembly head 9, and the upper end of the control rod 10 is rotatably connected to a movable block 11, the movable block 11 is located inside the mounting disk 7 and between the mounting disk 7 to form a horizontal sliding structure, the outer side of the movable block 11 is connected to a third telescope 14, and the upper end of the control rod 10 is provided with a synchronous rotation control mechanism to synchronously control the rotation of the control rod 10.

[0025] An assembly method of a high-precision anti-bias ball valve assembly machine, the method comprising the following steps: Step 1: Place the ball valve housing to be assembled in the middle of the support seat 3, center the ball valve through the valve body positioning mechanism, coincide the vertical center line of the support seat 3 and the vertical center line of the mounting plate 7, insert the mounting screw into the valve body hole, and control the number of assembly heads 9 used according to the number of screws installed.

[0026] Step 2: After the valve body is installed, the horizontal position of the movable block 11 is adjusted by the third telescopic device 14. The movable block 11 drives the assembly head 9 to move through the control rod 10, and the assembly diameter of the assembly head 9 is adjusted to adapt to the assembly requirements of the valve body, so that the assembly head 9 and the bolt are accurately connected to improve the assembly accuracy.

[0027] Step three: Control the mounting plate 7 to move downward through the second telescopic device 8 so that the assembly head 9 moves downward and connects with the mounting bolts, and then drive the control rod 10 to rotate through the synchronous rotation control mechanism, so that it drives the assembly head 9 to rotate to perform the assembly work. The evenly distributed assembly heads 9 rotate synchronously to improve the assembly efficiency.

[0028] Embodiment 2: Based on embodiment 1, a valve body positioning mechanism is disclosed, which includes a positioning block 4 and a first telescope 5. The positioning block 4 is evenly distributed at equal angles with the center of the support seat 3 as the center of the circle. The first telescope 5 is installed above the support seat 3 and connected to the positioning block 4 to control the movement of the positioning block 4. The support seat 3 and the base 1 are connected to each other in a rotating manner, and the support seat 3 is connected to a first motor 6 below the support seat 3 to control the rotation of the support seat 3. A mounting head 12 is arranged below the control rod 10, and the mounting head 12 and the assembly head 9 form a concave-convex matching structure, and the interior of the mounting head 12 is penetrated by a mounting member 13, and the mounting member 13 and the assembly head 9 form a concave-convex matching structure. A threaded connection is formed between the mating heads 9 to fix the connection between the mounting head 12 and the assembly head 9. The synchronous rotation control mechanism includes a torsion spring 15, a control rope 16, a control shaft 17, a first gear 18, a second gear 19, a mounting shaft 20 and a transmission mechanism. The torsion spring 15 is installed above the control rod 10 to provide a rotational reset force for the control rod 10. The control rope 16 is wound around the surface of the control rod 10. The control shaft 17 is rotatably installed inside the mounting plate 7, and the control shaft 17 and the control rope 16 are connected. The first gear 18 is arranged outside the control shaft 17, and the second gear 19 is arranged on the first gear 18. The inner side and the first gear 18 form a meshing connection, the mounting shaft 20 is fixed to the middle of the second gear 19, and the mounting shaft 20 and the mounting disk 7 form a rotational connection, the transmission mechanism is arranged below the mounting shaft 20 to control the rotation of the mounting shaft 20, the transmission mechanism includes a drive shaft 21, a second motor 22 and a connection control mechanism, the drive shaft 21 is arranged below the mounting shaft 20, and the drive shaft 21 and the mounting disk 7 form a rotational connection, the second motor 22 is arranged below the drive shaft 21 and connected to the drive shaft 21 to control the rotation of the drive shaft 21, and the connection control mechanism is arranged between the drive shaft 21 and the mounting shaft 20. At the connection, the connection control mechanism includes a docking block 29, a second spring 30, a docking groove 31 and a fixed rod 32. The docking block 29 is arranged above the driving shaft 21 and between the driving shaft 21 to form an up and down sliding structure. The second spring 30 is arranged below the docking block 29 to provide an upward thrust for the docking block 29. The docking groove 31 is opened below the mounting shaft 20, and a concave-convex matching structure is formed between the docking groove 31 and the docking block 29. The fixed rod 32 is arranged above the docking block 29, and the upper end of the fixed rod 32 passes through the upper end of the mounting shaft 20 and the upper end of the mounting plate 7, and the upper end of the fixed rod 32 is fixedly connected to the mounting frame 2.

[0029] After the valve body is placed on the supporting seat 3, the positioning block 4 is controlled by the first telescopic device 5 to position the valve body so that it remains centered to prevent subsequent deviation. The supporting seat 3 can be controlled to rotate by the first motor 6 to adjust the position of the mounting bolts so that they are opposite to the assembly head 9. When it is necessary to control the assembly head 9 to rotate, the mounting plate 7 is first controlled to move downward to release the squeezing of the docking block 29 by the fixing rod 32 so that the docking block 29 extends into the docking groove 31. Then the driving shaft 21 can be controlled by the second motor 22 to rotate. The driving shaft 21 will drive the second gear 19 to rotate through the mounting shaft 20. The second gear 19 drives the control shaft 17 to rotate by meshing with the first gear 18. The control shaft 17 will reel in the control rope 16 to drive the control rod 10 to rotate. The control rod 10 drives the assembly head 9 to rotate for assembly. After the mounting plate 7 is subsequently raised upward, the fixing rod 32 pushes the docking block 29 out of the docking groove 31, and the torsion spring 15 will drive the control rod 10 to reverse and reset it.

[0030] Embodiment 3: Based on Embodiment 1, a connecting ring 1701 is fixed on the surface of the control shaft 17, a sliding connection is formed between the first gear 18 and the connecting ring 1701, and a friction transmission mechanism is arranged inside the control shaft 17, so that the first gear 18 drives the control shaft 17 to rotate, and the friction transmission mechanism includes a connecting block 23, a first spring 24, an extrusion block 25, a connecting rod 26, a control ring 27 and a fourth retractor 28, the connecting block 23 is arranged inside the control shaft 17 and the control shaft 17, the first spring 24, It is arranged on the outer side of the connecting block 23 to provide thrust for the connecting block 23. The extrusion block 25 is arranged in the middle of the control shaft 17, and the surface of the extrusion block 25 is designed with an inclined structure. The connecting rod 26 is installed above the extrusion block 25, and the top of the connecting rod 26 passes through the top of the control shaft 17 and the top of the mounting plate 7. The control circle 27 is arranged above the connecting rod 26. The fourth telescope 28 is installed above the mounting plate 7, and the fourth telescope 28 and the control circle 27 are connected to control the vertical movement of the control circle 27.

[0031] The first gear 18 drives the control shaft 17 to rotate through the friction between the first gear 18 and the connecting block 23. When the control shaft 17 cannot continue to rotate, the first gear 18 will slide on the surface of the control shaft 17 without affecting the work of other control shafts 17 that can continue to rotate, thereby avoiding different tightening degrees of the bolts due to differences in the installation starting positions of some bolts, ensuring the consistency of bolt tightening and improving assembly accuracy.

[0032] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision anti-deflection ball valve assembly machine, comprising a base (1) and a mounting frame (2), wherein the mounting frame (2) is fixed above the base (1); Features: A support seat (3) is arranged above the base body (1), and a valve body positioning mechanism is arranged above the support seat (3) to position the valve body, and a mounting plate (7) is arranged above the support seat (3), and a second telescopic device (8) is arranged above the mounting plate (7) to control the height position of the mounting plate (7), and an assembly head (9) is arranged below the mounting plate (7), and the assembly heads (9) are arranged below the mounting plate (7) at equal angles with the center of the mounting plate (7) as the center of the circle, and a control rod (10) is connected above the assembly head (9), and the upper end of the control rod (10) is rotatably connected to a movable block (11), and the movable block (11) is located inside the mounting plate (7) and between the mounting plate (7) to form a horizontal sliding structure, and the outer side of the movable block (11) is connected to a third telescopic device (14), and the upper end of the control rod (10) is provided with a synchronous rotation control mechanism to synchronously control the rotation of the control rod (10).

2. A high-precision anti-deviation ball valve assembly machine according to claim 1, characterized in that: The valve body positioning mechanism comprises a positioning block (4) and a first retractor (5); The positioning blocks (4) are evenly distributed at equal angles with the center of the supporting seat (3) as the center of the circle; The first telescopic device (5) is installed above the supporting seat (3) and connected to the positioning block (4) to control the movement of the positioning block (4).

3. A high-precision anti-deviation ball valve assembly machine according to claim 1 or 2, characterized in that: The support seat (3) and the base (1) are rotatably connected, and a first motor (6) is connected below the support seat (3) to control the rotation of the support seat (3).

4. The high-precision anti-deviation ball valve assembly machine according to claim 1, characterized in that: A mounting head (12) is provided below the control rod (10), and the mounting head (12) and the assembly head (9) form a concave-convex matching structure above, and a mounting piece (13) penetrates the interior of the mounting head (12), and a threaded connection is formed between the mounting piece (13) and the assembly head (9), thereby fixing the connection between the mounting head (12) and the assembly head (9).

5. The high-precision anti-deviation ball valve assembly machine according to claim 1, characterized in that: The synchronous rotation control mechanism comprises a torsion spring (15), a control rope (16), a control shaft (17), a first gear (18), a second gear (19), a mounting shaft (20) and a transmission mechanism; A torsion spring (15) is installed above the control rod (10) to provide a rotational reset force for the control rod (10); A control rope (16) wound around the surface of the control rod (10); A control shaft (17) is rotatably mounted inside the mounting plate (7), and the control shaft (17) is connected to a control rope (16); A first gear (18) is arranged outside the control shaft (17); A second gear (19) is arranged inside the first gear (18) and meshes with the first gear (18); A mounting shaft (20) is fixed to the middle of the second gear (19), and a rotation connection is formed between the mounting shaft (20) and the mounting plate (7); The transmission mechanism is arranged below the installation shaft (20) and controls the rotation of the installation shaft (20).

6. A high-precision anti-deviation ball valve assembly machine according to claim 5, characterized in that: The transmission mechanism comprises a drive shaft (21), a second motor (22) and a connection control mechanism; A drive shaft (21) is disposed below the mounting shaft (20), and a rotational connection is formed between the drive shaft (21) and the mounting plate (7); A second motor (22), disposed below the drive shaft (21) and connected to the drive shaft (21) to control the rotation of the drive shaft (21); The connection control mechanism is arranged at the connection between the driving shaft (21) and the mounting shaft (20).

7. A high-precision anti-deviation ball valve assembly machine according to claim 6, characterized in that: The connection control mechanism comprises a docking block (29), a second spring (30), a docking groove (31) and a fixing rod (32); A docking block (29) is arranged above the driving shaft (21) and between the driving shaft (21) to form an up-and-down sliding structure; A second spring (30) is arranged below the docking block (29) to provide an upward thrust for the docking block (29); A docking groove (31) is provided below the mounting shaft (20), and a concave-convex matching structure is formed between the docking groove (31) and the docking block (29); The fixing rod (32) is arranged above the docking block (29), and the upper end of the fixing rod (32) penetrates the upper end of the mounting shaft (20) and the upper end of the mounting plate (7), and the upper end of the fixing rod (32) is fixedly connected to the mounting frame (2).

8. The high-precision anti-deviation ball valve assembly machine according to claim 1, characterized in that: A connecting ring (1701) is fixed on the surface of the control shaft (17), a sliding connection is formed between the first gear (18) and the connecting ring (1701), and a friction transmission mechanism is arranged inside the control shaft (17) so that the first gear (18) drives the control shaft (17) to rotate.

9. The high-precision anti-deviation ball valve assembly machine according to claim 8, characterized in that: The friction transmission mechanism comprises a connecting block (23), a first spring (24), an extrusion block (25), a connecting rod (26), a control ring (27) and a fourth retractor (28); A connecting block (23) is disposed inside the control shaft (17) and the control shaft (17); A first spring (24), arranged on the outside of the connecting block (23) to provide a thrust for the connecting block (23); An extrusion block (25) is arranged in the middle of the control shaft (17), and the surface of the extrusion block (25) is designed to be inclined; A connecting rod (26) is mounted above the extrusion block (25), and the upper part of the connecting rod (26) passes through the upper part of the control shaft (17) and the upper part of the mounting plate (7); A control ring (27) is arranged above the connecting rod (26); The fourth retractor (28) is installed above the mounting plate (7), and the fourth retractor (28) is connected to the control ring (27) to control the vertical movement of the control ring (27).

10. An assembly method of a high-precision anti-bias ball valve assembly machine, characterized in that: The method adopts a high-precision anti-bias ball valve assembly machine in claim 1, and the method comprises the following steps: Step 1: Place the ball valve housing to be assembled in the middle of the support seat (3), center the ball valve using the valve body positioning mechanism, and make the vertical center line of the support seat (3) coincide with the vertical center line of the mounting plate (7), insert the mounting screw into the hole of the valve body, and control the number of assembly heads (9) used according to the number of screws installed; Step 2: After the valve body is installed, the horizontal position of the movable block (11) is adjusted by the third telescopic device (14), and the movable block (11) drives the assembly head (9) to move through the control rod (10), and the assembly diameter of the assembly head (9) is adjusted to adapt to the assembly requirements of the valve body, so that the assembly head (9) and the bolt are accurately connected, thereby improving the assembly accuracy; Step 3: The second telescopic device (8) is used to control the mounting plate (7) to move downward so that the assembly head (9) moves downward and is connected with the mounting bolts. Then, the control rod (10) is driven to rotate through the synchronous rotation control mechanism so that the assembly head (9) is driven to rotate to perform the assembly work. The evenly distributed assembly heads (9) rotate synchronously to improve the assembly efficiency.

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