Sand casting ball valve clamping jaw

Abstract

The invention discloses a sand casting ball valve clamping jaw. The sand casting ball valve clamping jaw is characterized in that an arc-shaped track is arranged on a supporting disc; the first clamping arm is connected with the supporting disc and the first clamping block. The sliding block is installed on the arc-shaped rail in a sliding mode, and the second clamping arm is connected with the sliding block and the second clamping block. The clamping jaw driving part is installed on the supporting disc, the first clamping arm and the second clamping arms are all connected with the executing end of the clamping jaw driving part, the clamping jaw driving part can drive the first clamping block and the second clamping blocks to be close to the axis of the supporting disc at the same time, and the first clamping block and the second clamping blocks can jointly clamp the sand casting ball valve. The positions of the second clamping arms can be freely changed in the circumferential direction of the supporting disc, so that the function of clamping the sand casting ball valve at any non-uniform position in the circumferential direction is achieved, the application range of the sand casting ball valve clamping device is widened, and the flexibility of the clamping positions is improved; the clamping jaw can clamp sand casting ball valves of different sizes, and due to the fact that the first clamping block and the multiple second clamping blocks are sequentially arranged in the circumferential direction of the supporting disc, the self-centering positioning precision of the clamping jaw is high.

Description

Technical Field

[0001] The invention relates to the field of ball valve processing equipment, and more particularly to a sand-cast ball valve clamp. Background Art

[0002] The valve body blank of the sand-cast ball valve has a complex pouring and riser structure, and its positioning surface that can be used for clamping is relatively small. At present, the clamping of the sand-cast ball valve is mainly achieved by externally hugging the flange. The ideal clamping position is evenly distributed on a cylindrical surface, while the outer circle of the actual valve body top flange is generally lace-shaped. In addition, the complex pouring and riser structure also interferes with the originally evenly distributed clamping position, resulting in uneven circumferential distribution of the actual clamping position. At the same time, the sand-cast ball valve blank has the characteristics of large dimensional deviation and a weight of usually several hundred kilograms. Therefore, the design of the sand-cast ball valve jaws faces the triple challenges of difficult clamping position selection, high positioning accuracy requirements, and heavy load.

[0003] The existing self-centering jaws mainly include two-finger self-centering jaws, three-finger self-centering jaws and four-finger self-centering jaws. The finger spacing of the two-finger self-centering jaw is 180°, the finger spacing of the three-finger self-centering jaw is 120°, and the finger spacing of the four-finger self-centering jaw is 90°. These three types of self-centering jaws can only clamp the workpiece at a specific position. In practice, the shapes of workpieces are different, resulting in the absence of a suitable position for clamping by the above three types of self-centering jaws. Therefore, a special jaw has to be designed to complete the clamping task.

[0004] The clamping effect and efficiency of the clamping jaws directly affect the manufacturing cost and efficiency of the workpiece. The existing self-centering clamping jaws are not flexible in selecting the clamping position, making it difficult to achieve gripping at non-circumferentially uniformly distributed positions, and cannot achieve rapid switching between different numbers of gripping positions.

[0005] Therefore, how to provide a sand cast ball valve clamp that can overcome the above problems is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] In view of this, the present invention provides a sand-cast ball valve clamp.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A sand-cast ball valve clamp, comprising:

[0009] A support disk, wherein a curved track is provided on the disk surface of the support disk, and the center of a circle defined by a center line in a length direction of the curved track coincides with an axial center line of the support disk;

[0010] The clamping jaw assembly comprises a reference clamping jaw, an adjustable clamping jaw and a clamping jaw driving member, wherein the reference clamping jaw comprises a clamping arm 1 and a clamping block 1, one end of the clamping arm 1 is connected to the supporting disk, and the other end of the clamping arm 1 is equipped with the clamping block 1; the adjustable clamping jaw is provided with a plurality of, and the adjustable clamping jaw comprises a slider, a clamping arm 2 and a clamping block 2, the slider is slidably mounted on the arc track, one end of the clamping arm 2 is connected to the slider, and the other end of the clamping arm 2 is equipped with the clamping block 2; the clamping jaw driving member is mounted on the supporting disk, the clamping arm 1 and a plurality of the clamping arms 2 are all connected to the execution end of the clamping jaw driving member, the clamping jaw driving member can drive the clamping block 1 and a plurality of the clamping blocks 2 to approach the axis line of the supporting disk at the same time, the clamping block 1 and a plurality of the clamping blocks 2 are arranged in a circle coaxial with the axis line of the supporting disk, and the clamping block 1 and a plurality of the clamping blocks 2 can clamp the sand-cast ball valve together.

[0011] It can be known from the above technical scheme that, compared with the prior art, the present invention discloses a sand-cast ball valve clamp, in which one clamping arm one is provided, and multiple clamping arms two are provided, and the multiple clamping arms two are respectively connected to multiple sliders, and an arc track is designed on the support plate, and the slider can slide on the arc track. The above design enables the clamping arm two to change its position arbitrarily along the circumference of the support plate, thereby realizing the function of clamping the sand-cast ball valve at any non-uniform circumferential position, which greatly improves the scope of application of the present application and the flexibility of the clamping position; the clamp in the present application can clamp sand-cast ball valves of different sizes, and since the clamping block one and multiple clamping blocks two are arranged sequentially along the circumference of the support plate, the clamp has a good self-centering function and high self-centering positioning accuracy.

[0012] Preferably, the clamping arm 1 includes a connecting member 1, a connecting rod 1, a connecting member 2 and a connecting rod 2, the connecting member 1 being fixed on the supporting disk; the connecting rod 1 is provided with two, one ends of the two connecting rods 1 are hinged to the connecting member 1 and each has an articulation axis line 1 and an articulation axis line 2, the other ends of the two connecting rods 1 are hinged to the connecting member 2 and each has an articulation axis line 3 and an articulation axis line 4, the articulation axis line 1, the articulation axis line 2, the articulation axis line 3 and the articulation axis line 4 are parallel to each other and arranged in a parallelogram, the articulation axis line 1 is perpendicular to the axis line of the supporting disk; the clamping block 1 is fixed to the connecting member 2; one end of the connecting rod 2 is hinged to a side wall of the connecting rod 1 and has an articulation axis line 5, the articulation axis line 5 is parallel to the articulation axis line 1, the other end of the connecting rod 2 is hinged to the execution end of the clamping claw driving member Connection; the clamping arm 2 includes a connecting piece 3, a connecting rod 3, a connecting piece 4 and a connecting rod 4, the connecting piece 3 is fixed to the sliding block, the connecting rod 3 is provided with two, one end of the two connecting rods 3 are hinged to the connecting piece 3 and each have a hinge axis 6 and a hinge axis 7, the other end of the two connecting rods 3 are hinged to the connecting piece 4 and each have a hinge axis 8 and a hinge axis 9, the hinge axis 6, the hinge axis 7, the hinge axis 8 and the hinge axis 9 are parallel to each other and arranged in a parallelogram, the hinge axis 6 is perpendicular to the axis of the support plate; the clamping block 2 is fixed to the connecting piece 4; one end of the connecting rod 4 is hinged to a side wall of the connecting rod 3 and has a hinge axis 10, the hinge axis 10 is parallel to the hinge axis 6, and the other end of the connecting rod 4 is connected to the execution end of the clamping claw driving member. The first clamping arm and the second clamping arm can both move flexibly and can realize the clamping of sand-cast ball valves of different sizes.

[0013] Preferably, the clamping jaw driving component includes a telescopic cylinder, a mounting plate, a central axis, a limiting ring, a bearing 1, a bearing 2 and a connecting block, the telescopic cylinder is fixed on the supporting plate, and the telescopic direction of the telescopic end of the telescopic cylinder is parallel to the axial center line of the supporting plate; the mounting plate is coaxially arranged with the supporting plate, and the telescopic end of the telescopic cylinder is fixed with the mounting plate; the central axis is coaxially fixed on the mounting plate; the limiting ring is coaxially arranged with the mounting plate, and a plurality of limiting rings are provided, and the plurality of limiting rings are sequentially mounted together along the radial direction of the mounting plate; a bearing 1 is arranged between every two adjacent limiting rings along the radial direction of the mounting plate, and the bearing 1 is coaxially arranged with the mounting plate, and the same bearing 1 The outer ring and the inner ring are respectively interference fit with the inner wall of a limiting ring and the outer wall of the limiting ring adjacent to the mounting plate in the radial direction; the outer ring of the bearing 2 is interference fit with the inner wall of the limiting ring located on the innermost side, and the center axis is interference fit with the inner ring of the bearing 2; there are multiple connecting blocks, and each of the multiple connecting blocks is fixed to a plurality of the limiting rings; one end of the connecting rod 2 away from the connecting rod 1 is hinged to the mounting plate and has a hinge axis eleven, and the hinge axis eleven is parallel to the hinge axis five; one end of the multiple connecting rods four away from the connecting rod three is respectively hinged to the multiple connecting blocks and has a hinge axis twelve, and the hinge axis twelve is parallel to the hinge axis ten. The telescopic cylinder can drive the clamping arm 1 and the clamping arm 2 to move, thereby realizing the gathering or separation of the clamping block 1 and multiple clamping blocks 2. The circumferential movement of the clamping arm 2 along the support plate does not affect the telescopic cylinder 2 driving the clamping block 1 and multiple clamping blocks 2 to gather or separate.

[0014] Preferably, the adjustable clamp further comprises a bevel gear 1, a motor and a bevel gear 2, wherein the bevel gear 1 is coaxially fixed with the support plate, the bevel gear 1 is located inside the arc track, the bevel gear 1 is centrally provided with a clearance hole, and the telescopic cylinder is arranged inside the clearance hole; the motor is provided with a plurality of bevel gears and each is fixed with a plurality of the connecting members 3; the bevel gear 2 is provided with a plurality of bevel gears, each of which is coaxially fixed with a plurality of output shafts of the motors, and a plurality of bevel gears 2 are simultaneously meshed with a plurality of bevel gears 1. The clamping arm 2 can smoothly move along the circumference of the support plate.

[0015] Preferably, the adjustable clamping jaw further comprises a travel switch 1, a travel switch 2, a travel switch 3 and a positioning block, the travel switch 1 is provided with two and both are fixed on the support disk, the elastic contact of the travel switch 1 is in a direction parallel to the axis of the support disk, and the two travel switches 1 are evenly arranged along the circumference of the support disk; the travel switch 2 is provided with two and both are fixed on the support disk, the elastic contact of the travel switch 2 is in a direction parallel to the axis of the support disk, the connecting piece 1 and the two travel switches 2 are evenly arranged in sequence along the circumference of the support disk; the travel switch There are three travel switches 3 and they are all fixed on the support disk. The extension direction of the elastic contact of the travel switch 3 is parallel to the axis of the support disk. The connector 1 and the three travel switches 3 are evenly arranged in sequence along the circumference of the support disk. There are multiple positioning blocks and each is fixed to multiple connectors 3. The positioning block is provided with a clamping hole. The inner side of the clamping hole can be embedded with the elastic contact of the travel switch 1, the elastic contact of the travel switch 2 or the elastic contact of the travel switch 3. The motor, the travel switch 1, the travel switch 2 and the travel switch 3 are all electrically connected to the external controller. The above design can accurately position the three clamping arms 2. One clamping arm 1 and three clamping arms 2 have different arrangements, that is, with the axis of the support disk as the center, two clamping arms 2 can be 180° to each other, one clamping arm 1 and two clamping arms 2 can be 120° to each other, and one clamping arm 1 and three clamping arms 2 can be 90° to each other.

[0016] Preferably, a cover is further provided on the support plate, the telescopic cylinder, the bevel gear 1 and the bevel gear 2 are all located in the cover, a plurality of the elongated holes are provided on the side wall of the cover, and a plurality of output shafts of the motor are respectively passed through the plurality of elongated holes. The cover can shield and protect the bevel gear 1 and the bevel gear 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 An integral axonometric view of a sand cast ball valve jaw Figure 1 ;

[0019] Figure 2 An integral axonometric view of a sand cast ball valve jaw Figure 2 ;

[0020] Figure 3A partial axonometric view of a sand-cast ball valve jaw Figure 1 ;

[0021] Figure 4 A partial axonometric view of a sand-cast ball valve jaw Figure 2 ;

[0022] Figure 5 A partial axonometric view of a sand-cast ball valve jaw Figure 3 ;

[0023] Figure 6 A partial axonometric view of a sand-cast ball valve jaw Figure 4 ;

[0024] Figure 7 It is an axonometric view of a sand-cast ball valve clamp holding a sand-cast ball valve with a pouring riser.

[0025] In the figure:

[0026] 1 is a supporting plate, 2 is an arc track, 3 is a connecting piece 1, 4 is a connecting rod 1, 5 is a connecting piece 2, 6 is a connecting rod 2, 7 is a clamping block 1, 8 is a slider, 9 is a connecting piece 3, 10 is a connecting rod 3, 11 is a connecting piece 4, 12 is a connecting rod 4, 13 is a clamping block 2, 14 is a bevel gear 1, 15 is a motor, 16 is a bevel gear 2, 17 is a travel switch 1, 18 is a travel switch 2, 19 is a travel switch 3, 20 is a positioning block, 200 is a clamping hole, 21 is a telescopic cylinder, 22 is a mounting plate, 23 is a central shaft, 24 is a limiting ring, 25 is a bearing 1, 26 is a bearing 2, 27 is a connecting block, and 28 is a cover body. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0028] The present invention discloses a sand-cast ball valve clamp. In the present invention, one clamping arm 1 is provided, and multiple clamping arms 2 are provided. The multiple clamping arms 2 are respectively connected to multiple sliders 8. An arc track 2 is designed on a support plate 1, and the sliders 8 can slide on the arc track 2. The above design enables the clamping arm 2 to change its position arbitrarily along the circumference of the support plate 1, thereby realizing the function of clamping the sand-cast ball valve at any position that is not uniformly distributed around the circumference, which greatly improves the application scope of the present application and the flexibility of the clamping position.

[0029] The structures of the clamping arm 1 and the clamping arm 2 are simple and reliable. While ensuring the flexible movement of the clamping arm 1 and the clamping arm 2, the clamping block 1 7 and the clamping block 2 13 can effectively clamp the sand-cast ball valve, with strong clamping force, high clamping stability and large clamping load;

[0030] By designing the telescopic cylinder 21, the telescopic action of the telescopic cylinder 21 can realize the synchronous gathering or separation of the clamping block 1 7 and the plurality of clamping blocks 2 13, ensuring the smooth movement of the clamping arm 1 and the clamping arm 2;

[0031] By designing the mounting plate 22, the central shaft 23, the limiting ring 24, the bearing 1 25, the bearing 26 and the connecting block 27, the clamping arm 2 can flexibly move along the circumference of the support plate 1 in the non-grasping state, and the circumferential movement of the clamping arm 2 along the support plate 1 does not affect the movement of the clamping arm 2 and the clamping block 2 13 driven by the telescopic cylinder 21;

[0032] By designing the bevel gear 1 14, the motor 15 and the bevel gear 2 16, the slider 8 and the clamping arm 2 can smoothly move along the length direction of the arc track 2;

[0033] By designing the travel switch 1 17, the travel switch 2 18, the travel switch 3 19 and the positioning block 20, the three clamping arms 2 can be accurately positioned. One clamping arm 1 and three clamping arms 2 have different arrangements, that is, with the axis of the support plate 1 as the center, the two clamping arms 2 can be 180° to each other, one clamping arm 1 and two clamping arms 2 can be 120° to each other, and one clamping arm 1 and three clamping arms 2 can be 90° to each other. This design can reliably clamp the sand-cast ball valve.

[0034] The clamp in the present application can clamp sand-cast ball valves of different sizes. At the same time, since the clamping block 1 7 and the multiple clamping blocks 2 13 act synchronously, and the clamping block 1 7 and the multiple clamping blocks 2 13 are arranged in sequence along the circumference of the support plate 1, the clamp has a good self-centering function and high self-centering positioning accuracy.

[0035] Example

[0036] See attached Figure 1-7 The overall and partial structural schematic diagram of an embodiment of the present invention specifically discloses a sand casting ball valve clamp, including:

[0037] A support disk 1, the outer contour of the support disk 1 is circular, and an arc track 2 is provided on the disk surface of the support disk 1, and the center of a circle defined by the center line of the arc track 2 in the length direction coincides with the axis center line of the support disk 1;

[0038] A clamping jaw assembly, the clamping jaw assembly comprising a reference clamping jaw, an adjustable clamping jaw and a clamping jaw driving member;

[0039] The reference clamp includes a clamping arm 1 and a clamping block 1 7, one end of the clamping arm 1 is connected to the support plate 1, and the other end of the clamping arm 1 is installed with a clamping block 1 7;

[0040] There are multiple adjustable clamps, which include a slider 8, a clamping arm 2 and a clamping block 2 13. The slider 8 is slidably mounted on the arc track 2. One end of the clamping arm 2 is connected to the slider 8. The other end of the clamping arm 2 is mounted with a clamping block 2 13. The slider 8 can slide along the length direction of the arc track 2. The clamping arm 2 and the clamping block 2 13 can change position with the movement of the slider 8, thereby adjusting the contact position between the clamping block 2 13 and the sand-cast ball valve.

[0041] The clamping jaw driving member is installed on the supporting plate 1, the clamping arm 1 and the multiple clamping arms 2 are connected to the executing end of the clamping jaw driving member, the clamping block 1 7 and the multiple clamping blocks 2 13 are arranged in a circle coaxial with the axis of the supporting plate 1, and the clamping jaw driving member can simultaneously drive the clamping block 1 7 and the clamping block 2 13 to move, so that the clamping block 1 7 and the multiple clamping blocks 2 13 can gather toward or move away from the axis of the supporting plate 1. The above design ensures that the clamping block 1 7 and the multiple clamping blocks 2 13 can clamp the sand cast ball valve together.

[0042] The clamping arm 1 includes a connecting piece 1 3, a connecting rod 1 4, a connecting piece 2 5 and a connecting rod 2 6. The connecting piece 1 3 is fixed to the supporting plate 1 by bolt connection. There are two connecting rods 1 4. One end of each of the two connecting rods 1 4 is hinged to the connecting piece 1 3 and each has a hinge axis 1 and a hinge axis 2. The other ends of each of the two connecting rods 1 4 are hinged to the connecting piece 2 5 and each has a hinge axis 3 and a hinge axis 4. The hinge axis 1, the hinge axis 2, the hinge axis 3 and the hinge axis 4 are parallel to each other and are arranged in a parallelogram. The connecting axis line 1 is perpendicular to the axis line of the support plate 1; the clamping block 1 7 is fixed to the connecting piece 2 5; one end of the connecting rod 2 6 is hinged to the side wall of a connecting rod 1 4 and has a hinge axis line 5, the hinge axis line 5 is parallel to the hinge axis line 1, and the other end of the connecting rod 2 6 is connected to the execution end of the clamping claw driving member; on the one hand, the clamping arm 1 can be reliably connected to the execution end of the clamping claw driving member, on the other hand, the clamping arm 1 can move flexibly, and the clamping block 1 7 can smoothly approach or move away from the axis line of the support plate 1, that is, the clamping block 1 7 can smoothly approach or move away from the sand casting ball valve;

[0043] The clamping arm 2 includes a connecting piece 3 9, a connecting rod 3 10, a connecting piece 4 11 and a connecting rod 4 12. The connecting piece 3 9 is fixed to the slider 8 by bolt connection. There are two connecting rods 3 10. One end of the two connecting rods 3 10 is hinged to the connecting piece 3 9 and each has a hinge axis 6 and a hinge axis 7. The other ends of the two connecting rods 3 10 are hinged to the connecting piece 4 11 and each has a hinge axis 8 and a hinge axis 9. The hinge axis 6, the hinge axis 7, the hinge axis 8 and the hinge axis 9 are parallel to each other and are arranged in a parallelogram. The axis line six is ​​perpendicular to the axis line of the support plate 1; the clamping block two 13 is fixed to the connecting piece four 11; one end of the connecting rod four 12 is hinged to the side wall of a connecting rod three 10 and has a hinge axis line ten, the hinge axis line ten is parallel to the hinge axis line six, and the other end of the connecting rod four 12 is connected to the execution end of the clamping claw driving member; on the one hand, the clamping arm two can be reliably connected to the execution end of the clamping claw driving member, on the other hand, the clamping arm two can move flexibly, and the clamping block two 13 can smoothly approach or move away from the axis line of the support plate 1, that is, the clamping block two 13 can smoothly approach or move away from the sand cast ball valve.

[0044] The clamping claw driving member includes a telescopic cylinder 21, a mounting plate 22, a central axis 23, a limiting ring 24, a bearing 1 25, a bearing 26 and a connecting block 27. The telescopic cylinder 21 is fixed on the support plate 1. The telescopic cylinder 21 in the present application is an electric cylinder. The telescopic direction of the telescopic end of the telescopic cylinder 21 is parallel to the axis of the support plate 1; the mounting plate 22 is a circular plate and is coaxially arranged with the support plate 1. The support plate 1 is arranged between the mounting plate 22 and the telescopic cylinder 21. The telescopic end of the telescopic cylinder 21 is fixed to the mounting plate 22 after passing through the disk surface of the support plate 1; the central axis 23 is coaxially fixed on the mounting plate 22; the limiting ring 24 is coaxially arranged with the mounting plate 22, and the limiting ring 24 is provided with a plurality of limiting rings with different diameters. One end wall of the plurality of limiting rings 24 is fixed to the disk surface of the mounting plate 22 away from the telescopic cylinder 21 on one side, and the plurality of limiting rings 24 are sequentially mounted together along the radial direction of the mounting plate 22; along the radial direction of the mounting plate 22, every two adjacent A bearing 25 is arranged between the limit rings 24. The bearing 25 is coaxially arranged with the mounting plate 22. The outer ring and the inner ring of the same bearing 25 are respectively interference fit with the inner wall of a limit ring 24 and the outer wall of a limit ring 24 adjacent to the mounting plate 22 in the radial direction; the outer ring of the bearing 26 is interference fit with the inner wall of the limit ring 24 located on the innermost side, and the center axis 23 is interference fit with the inner ring of the bearing 26. Both the bearing 1 25 and the bearing 2 26 are deep groove ball bearings; there are multiple connecting blocks 27, and each of the multiple connecting blocks 27 is fixed to a plurality of limit rings 24; the end of the connecting rod 2 6 away from the connecting rod 1 4 is hinged to the mounting plate 22 and has a hinge axis 11, and the hinge axis 11 is parallel to the hinge axis 5; the ends of the multiple connecting rods 4 12 away from the connecting rod 3 10 are respectively hinged to the multiple connecting blocks 27 and have a hinge axis 12, and the hinge axis 12 is parallel to the hinge axis 10.

[0045] The telescopic cylinder 21 can drive the mounting plate 22 and the limiting ring 24 to move back and forth along the direction of the axis of the support plate 1. The connecting rod 26 is hinged to the mounting plate 22, and the connecting rod 4 12 is hinged to the connecting block 27. When the mounting plate 22 and the limiting ring 24 move, the clamping block 1 7 and multiple clamping blocks 2 13 can converge or move away from the axis of the support plate 1; by designing the central axis 23, the limiting ring 24, the bearing 1 25 and the bearing 2 26, when the position of the clamping block 2 13 is adjusted along the circumferential direction of the support plate 1, no matter how the position of the clamping block 2 13 changes, the telescopic cylinder 21 can always reliably drive the clamping arm 2 to move.

[0046] To be more specific, the adjustable clamp also includes a bevel gear 14, a motor 15 and a bevel gear 2 16. The bevel gear 14 is coaxially fixed with the support plate 1, and the bevel gear 14 is located on the inner side of the arc track 2. The bevel gear 14 is centrally provided with a clearance hole, and a telescopic cylinder 21 is arranged on the inner side of the clearance hole; the motor 15 is provided with multiple motors and each is fixed with multiple connecting parts 3 9. The motor 15 in the present application is a servo motor with a brake, that is, the motor 15 has a braking function after stopping, so as to ensure that the bevel gear 2 16 will not continue to rotate; there are multiple bevel gears 2 16, and each of the multiple bevel gears 2 16 is coaxially fixed with the output shafts of multiple motors 15, and multiple bevel gears 2 16 are simultaneously meshed with multiple bevel gears 14; the motor 15 drives the bevel gear 2 16 to rotate, and while the bevel gear 2 16 itself rotates, it can also rotate with the axis of the bevel gear 14 as the center, thereby realizing the position adjustment of multiple clamping blocks 2 13.

[0047] More specifically, the adjustable clamping jaw further includes a travel switch 17, a travel switch 2 18, a travel switch 3 19 and a positioning block 20;

[0048] Two travel switches 17 are provided and both are fixed on the support plate 1. The travel switch 17 has an elastic contact that can realize elastic reset. Pressing the elastic contact can realize the circuit of the travel switch 17. The extension direction of the elastic contact of the travel switch 17 is parallel to the axis of the support plate 1. The two travel switches 17 are evenly arranged along the circumference of the support plate 1, that is, with the center line of the support plate 1 as the center, the angle between the two travel switches 17 is 180°;

[0049] Two travel switches 18 are provided and both are fixed on the support plate 1. The travel switch 18 has an elastic contact that can realize elastic reset. Pressing the elastic contact can realize the circuit of the travel switch 18. The extension direction of the elastic contact of the travel switch 18 is parallel to the axis of the support plate 1. The connecting piece 13 and the two travel switches 18 are evenly arranged in sequence along the circumference of the support plate 1, that is, with the center line of the support plate 1 as the center, the connecting piece 13 and the two travel switches 18 are at an angle of 120° to each other;

[0050] There are three travel switches 19 and they are all fixed on the support plate 1. The travel switch 19 has an elastic contact that can realize elastic reset. Pressing the elastic contact can realize the circuit of the travel switch 19. The extension direction of the elastic contact of the travel switch 19 is parallel to the axis of the support plate 1. The connecting piece 13 and the three travel switches 19 are evenly arranged in sequence along the circumference of the support plate 1, that is, with the center line of the support plate 1 as the center, the connecting piece 13 and the three travel switches 19 are at an angle of 90° to each other.

[0051] A plurality of positioning blocks 20 are provided and each is fixed to a plurality of connecting members three 9. A snap-fitting hole 200 is provided on the positioning block 20. The snap-fitting hole 200 is directly opposite to the clamping block two 13 along the axial direction of the support plate 1. The edge of the snap-fitting hole 200 is provided with a chamfer. The elastic contact of the travel switch one 17, the elastic contact of the travel switch two 18 and the elastic contact of the travel switch three 19 all have smooth surfaces. The inner side of the snap-fitting hole 200 can be embedded with the elastic contact of the travel switch one 17, the elastic contact of the travel switch two 18 or the elastic contact of the travel switch three 19.

[0052] The motor 15, the travel switch 1 17, the travel switch 2 18 and the travel switch 3 19 are all electrically connected to the external controller; in the present application, there are three clamping arms 2, and by designing the travel switch 1 17, the travel switch 2 18, the travel switch 3 19 and the positioning block 20, the three clamping arms 2 can be accurately positioned, and one clamping arm 1 and three clamping arms 2 have different arrangements, that is, with the axis of the support plate 1 as the center, the two clamping arms 2 can be 180° to each other, one clamping arm 1 and two clamping arms 2 can be 120° to each other, and one clamping arm 1 and three clamping arms 2 can be 90° to each other;

[0053] The motor 15 drives the slider 8 to move on the arc track 2. When the travel switch 1 17, the travel switch 2 18 or the travel switch 3 19 moves into or out of the clamping hole 200, the travel switch 1 17, the travel switch 2 18 or the travel switch 3 19 transmits a signal to the external controller.

[0054] When the travel switch 1 17 , the travel switch 2 18 or the travel switch 3 19 moves into the clamping hole 200 , the external controller controls the motor 15 to stop and lock immediately, so as to prevent the clamping arm 2 from moving randomly along the circumference of the support plate 1 when the sand-cast ball valve is clamped subsequently.

[0055] A cylindrical cover 28 is also provided on the support plate 1, and the telescopic cylinder 21, bevel gear 14 and bevel gear 2 16 are all located in the cover 28. A plurality of long holes are provided on the side wall of the cover 28, and the output shaft of the motor 15 is passed through the long holes. The tail end of the telescopic cylinder 21 is connected to the cover 28, and the cover 28 can shield and protect the bevel gear 14 and bevel gear 2 16.

[0056] The clamping claw can clamp the sand-cast ball valve. Specifically, the clamping block 1 7 and multiple clamping blocks 2 13 can simultaneously press against the top flange of the sand-cast ball valve body. When the top flange of the sand-cast ball valve has an irregular outer contour or the sand-cast ball valve has a complex pouring and riser structure, the motor 15 can be started to adjust the positions of multiple clamping arms 2 on the support plate 1, so that the clamping block 1 7 and the clamping block 2 13 can effectively clamp the top flange of the sand-cast ball valve.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0058] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sand cast ball valve clamp, characterized in that: include: A support disk (1), wherein a curved track (2) is provided on the disk surface of the support disk (1), and the center of a circle defined by a center line in the length direction of the curved track (2) coincides with the axis line of the support disk (1); A clamping jaw assembly, the clamping jaw assembly includes a reference clamping jaw, an adjustable clamping jaw and a clamping jaw driving member, the reference clamping jaw includes a clamping arm 1 and a clamping block 1 (7), one end of the clamping arm 1 is connected to the support plate (1), and the other end of the clamping arm 1 is installed with the clamping block 1 (7); the adjustable clamping jaw is provided with a plurality of adjustable jaws, the adjustable jaw includes a slider (8), a clamping arm 2 and a clamping block 2 (13), the slider (8) is slidably installed on the arc track (2), one end of the clamping arm 2 is connected to the slider (8), and the other end of the clamping arm 2 is installed The clamping block 2 (13) is installed; the clamping jaw driving member is installed on the supporting plate (1); the clamping arm 1 and multiple clamping arms 2 are connected to the execution end of the clamping jaw driving member; the clamping jaw driving member can drive the clamping block 1 (7) and multiple clamping blocks 2 (13) to approach the axis of the supporting plate (1) at the same time; the clamping block 1 (7) and multiple clamping blocks 2 (13) are arranged in a circle coaxial with the axis of the supporting plate (1); the clamping block 1 (7) and multiple clamping blocks 2 (13) can clamp the sand-cast ball valve together.

2. The sand casting ball valve clamp according to claim 1, characterized in that: The clamping arm 1 comprises a connecting member 1 (3), a connecting rod 1 (4), a connecting member 2 (5) and a connecting rod 2 (6); the connecting member 1 (3) is fixed on the supporting plate (1); the connecting rod 1 (4) is provided with two, one end of the two connecting rods 1 (4) is hinged to the connecting member 1 (3) and each has a hinge axis 1 and a hinge axis 2, the other end of the two connecting rods 1 (4) is hinged to the connecting member 2 (5) and each has a hinge axis 3 and a hinge axis 4, the hinge axis 1, the connecting rod 1 and the connecting rod 2 are hinged to each other, and the hinge axis 1 and the connecting rod 1 are hinged to each other. The hinge axis 2, the hinge axis 3 and the hinge axis 4 are parallel to each other and arranged in a parallelogram shape, the hinge axis 1 is perpendicular to the axis of the support plate (1); the clamping block 1 (7) is fixed to the connecting member 2 (5); one end of the connecting rod 2 (6) is hinged to a side wall of the connecting rod 1 (4) and has a hinge axis 5, the hinge axis 5 is parallel to the hinge axis 1, and the other end of the connecting rod 2 (6) is connected to the execution end of the clamping claw driving member; the clamping arm The second embodiment comprises a connecting member 3 (9), a connecting rod 3 (10), a connecting member 4 (11) and a connecting rod 4 (12), wherein the connecting member 3 (9) is fixed to the slider (8), and the connecting rod 3 (10) is provided with two, one end of each of the two connecting rods 3 (10) is hinged to the connecting member 3 (9) and each has a hinge axis line 6 and a hinge axis line 7, and the other end of each of the two connecting rods 3 (10) is hinged to the connecting member 4 (11) and each has a hinge axis line 8 and a hinge axis line 9, and the hinge axis lines 6 and 7 are respectively connected to the connecting member 4 (11). The articulation axis seven, the articulation axis eight and the articulation axis nine are parallel to each other and arranged in a parallelogram, the articulation axis six is ​​perpendicular to the axis of the support plate (1); the clamping block two (13) is fixed to the connecting member four (11); one end of the connecting rod four (12) is hinged to a side wall of the connecting rod three (10) and has an articulation axis ten, the articulation axis ten is parallel to the articulation axis six, and the other end of the connecting rod four (12) is connected to the execution end of the clamping jaw driving member.

3. The sand casting ball valve clamp according to claim 2, characterized in that: The clamping jaw driving member comprises a telescopic cylinder (21), a mounting plate (22), a central shaft (23), a limiting ring (24), a first bearing (25), a second bearing (26) and a connecting block (27); the telescopic cylinder (21) is fixed on the supporting plate (1); the telescopic direction of the telescopic end of the telescopic cylinder (21) is parallel to the axis of the supporting plate (1); the mounting plate (22) is coaxially arranged with the supporting plate (1); the telescopic end of the telescopic cylinder (21) is parallel to the axis of the mounting plate (22); The mounting plate (22) is fixed; the central axis (23) is coaxially fixed on the mounting plate (22); the limiting ring (24) is coaxially arranged with the mounting plate (22), and a plurality of limiting rings (24) are provided, and the plurality of limiting rings (24) are sequentially mounted together along the radial direction of the mounting plate (22); a bearing 1 (25) is arranged between each two adjacent limiting rings (24) along the radial direction of the mounting plate (22), and the bearing 1 (25) is aligned with the mounting plate (22) are coaxially arranged, the outer ring and the inner ring of the same bearing one (25) are respectively interference fit with the inner wall of a limiting ring (24) and the outer wall of a limiting ring (24) adjacent to the mounting plate (22) in the radial direction; the outer ring of the bearing two (26) is interference fit with the inner wall of the limiting ring (24) located at the innermost side, and the central axis (23) is interference fit with the inner ring of the bearing two (26); the connecting block (27) is provided with a plurality of, a plurality of The connecting blocks (27) are each fixed to the plurality of limiting rings (24); one end of the connecting rod two (6) away from the connecting rod one (4) is hinged to the mounting plate (22) and has an articulation axis eleven, and the articulation axis eleven is parallel to the articulation axis five; one end of the plurality of connecting rod fours (12) away from the connecting rod three (10) is each hinged to the plurality of connecting blocks (27) and has an articulation axis twelve, and the articulation axis twelve is parallel to the articulation axis ten.

4. The sand casting ball valve clamp according to claim 3, characterized in that: The adjustable clamping jaw further comprises a bevel gear 1 (14), a motor (15) and a bevel gear 2 (16); the bevel gear 1 (14) is coaxially fixed with the support plate (1); the bevel gear 1 (14) is located on the inner side of the arc track (2); a clearance hole is centrally provided on the bevel gear 1 (14); the telescopic cylinder (21) is arranged on the inner side of the clearance hole; the motor (15) is provided with a plurality of bevel gears and each of them is fixed with a plurality of the connecting members 3 (9); the bevel gear 2 (16) is provided with a plurality of bevel gears, each of which is coaxially fixed with the output shaft of the plurality of motors (15); and the plurality of bevel gears 2 (16) are simultaneously meshed with the plurality of bevel gears 1 (14).

5. The sand casting ball valve clamp according to claim 4, characterized in that: The adjustable clamping jaw further comprises a travel switch 1 (17), a travel switch 2 (18), a travel switch 3 (19) and a positioning block (20); the travel switch 1 (17) is provided with two and both are fixed on the support disk (1); the elastic contact of the travel switch 1 (17) has a direction of expansion and contraction parallel to the axis of the support disk (1); the two travel switches 1 (17) are evenly arranged along the circumference of the support disk (1); the travel switch 2 (18) is provided with two and both are fixed on the support disk (1); the elastic contact of the travel switch 2 (18) has a direction of expansion and contraction parallel to the axis of the support disk (1); the connecting piece 1 (3) and the two travel switches 2 (18) are evenly arranged in sequence along the circumference of the support disk (1); the travel switch 3 (19) has three and all are fixed on the support disk (1); the extension direction of the elastic contact of the travel switch three (19) is parallel to the axis of the support disk (1); the connecting piece one (3) and the three travel switches three (19) are evenly arranged in sequence along the circumference of the support disk (1); the positioning block (20) is provided with a plurality of and each is fixed to a plurality of the connecting pieces three (9); the positioning block (20) is provided with a snap-in hole (200), the inner side of the snap-in hole (200) can be embedded with the elastic contact of the travel switch one (17), the elastic contact of the travel switch two (18) or the elastic contact of the travel switch three (19); the motor (15), the travel switch one (17), the travel switch two (18) and the travel switch three (19) are all electrically connected to an external controller.

6. The sand casting ball valve clamp according to claim 4, characterized in that: A cover body (28) is also buckled on the support plate (1), the telescopic cylinder (21), the bevel gear 1 (14) and the bevel gear 2 (16) are all located in the cover body (28), a plurality of the elongated holes are opened on the side wall of the cover body (28), and a plurality of output shafts of the motor (15) are respectively passed through the plurality of elongated holes.

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