Clamp structure for cutting three-eccentric center butterfly valve body

Abstract

The invention provides a clamp structure for cutting a three-eccentric center butterfly valve body, which comprises a first supporting table, a second supporting table, a third supporting table and a fourth supporting table, the connecting arm is hinged to the first supporting table, and the connecting arm is suitable for rotating relative to the first supporting table in the first direction; the second supporting table is arranged on the connecting arm, the second supporting table is suitable for sliding relative to the connecting arm in the second direction, and the axis of the second supporting table extends in the third direction; the first transmission assembly is connected to the connecting arm and used for driving the connecting arm to rotate relative to the first supporting table; the second transmission assembly is connected to the second supporting table and used for driving the second supporting table to slide relative to the connecting arm; wherein the axial end of the second supporting table is used for containing a valve body to be machined, and the first direction, the second direction and the third direction are perpendicular to one another.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of machining equipment, in particular to a clamp structure for cutting machining of a three-eccentric butterfly valve body. BACKGROUND

[0002] In the related art, when cutting machining of a three-eccentric butterfly valve body is performed, a corresponding clamp is usually configured for each process, so that the posture of the valve body after being clamped and positioned by each clamp can adapt to the tool action of the corresponding process, thereby resulting in a large number of clamps that need to be provided when cutting machining of the valve body, and a great workload of clamping and positioning of the workpiece, which limits the machining efficiency of the three-eccentric butterfly valve. SUMMARY

[0003] The present disclosure aims to at least solve one of the technical problems existing in the prior art or related art.

[0004] Therefore, according to an embodiment of the present disclosure, a clamp structure for cutting machining of a three-eccentric butterfly valve body is provided, which comprises:

[0005] A first support table is arranged on a workbench of a machine tool.

[0006] A connecting arm is hingedly connected to the first support table, and the connecting arm is adapted to rotate relative to the first support table about a first direction.

[0007] A second support table is arranged on the connecting arm, and the second support table is adapted to slide relative to the connecting arm along a second direction, and an axis of the second support table extends along a third direction.

[0008] A first transmission assembly is connected to the connecting arm, and is used to drive the connecting arm to rotate relative to the first support table.

[0009] A second transmission assembly is connected to the second support table, and is used to drive the second support table to slide relative to the connecting arm.

[0010] An end of the second support table in an axial direction is used to place a valve body to be machined, and the first direction, the second direction and the third direction are perpendicular to each other.

[0011] In a possible implementation, the first transmission assembly comprises:

[0012] A hydraulic cylinder is arranged on the first support table.

[0013] A connecting rod mechanism is drivingly connected between the hydraulic cylinder and the connecting arm.

[0014] The hydraulic cylinder is used to drive the connecting arm to rotate relative to the first support table through the connecting rod mechanism.

[0015] In a possible implementation, the connecting rod mechanism comprises:

[0016] a first link having a first link end and a second link end, the first link end being hingedly connected to the piston rod of the hydraulic cylinder;

[0017] a second link having a third link end and a fourth link end, the third link end being hingedly connected to the second link end, and the fourth link end being hingedly connected to the connecting arm;

[0018] a third link having a fifth link end and a sixth link end, the fifth link end being hingedly connected to the second link end, and the sixth link end being hingedly connected to the first support table.

[0019] In an embodiment, the number of link mechanisms is plural, and the plural link mechanisms are arranged along the first direction.

[0020] In an embodiment, the second transmission assembly comprises:

[0021] a screw mechanism drivingly connected between the connecting arm and the second support table;

[0022] an operation member drivingly connected to the screw mechanism;

[0023] wherein the operation member is configured to drive the second support table to slide relative to the connecting arm via the screw mechanism.

[0024] In an embodiment, the screw mechanism comprises:

[0025] a transmission nut fixedly arranged on the connecting arm;

[0026] a transmission screw threadedly connected to the transmission nut, an axis of the transmission screw extending along the second direction, and the operation member configured to drive the transmission screw to rotate relative to the transmission nut;

[0027] a screw support fixedly arranged on the second support table, and the transmission screw being rotatably arranged on the screw support.

[0028] In an embodiment, the screw support and the second support table are integrated.

[0029] In an embodiment, the second transmission assembly further comprises:

[0030] a gear mechanism drivingly connected between the transmission screw and the operation member, and the operation member configured to drive the transmission screw to rotate relative to the transmission nut via the gear mechanism;

[0031] wherein a transmission ratio of the gear mechanism is greater than 1.

[0032] In an embodiment, the aforementioned clamp structure further comprises:

[0033] a first limiting member detachably arranged between the first support table and the second support table, and configured to limit the connecting arm to rotate relative to the first support table; and / or

[0034] The second limiting member is detachably disposed between the second support platform and the connecting arm to limit the sliding of the second support platform relative to the connecting arm.

[0035] In one feasible implementation, the aforementioned clamp structure further includes:

[0036] A first positioning element, disposed on a first support platform, is used to limit the relative position of the worktable and the first support platform; and / or

[0037] The second positioning element is disposed on the second support platform and is used to limit the relative position of the valve body to be processed and the second support platform.

[0038] The above description is merely an overview of the technical solution provided in this disclosure. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other features and effects of this disclosure more obvious and understandable, the following are specific examples of the implementation methods of this disclosure. Attached Figure Description

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0040] Figure 1 This is a schematic structural diagram of a triple eccentric butterfly valve;

[0041] Figure 2 A schematic analog diagram from a first-view perspective of a clamp structure according to an embodiment of this disclosure;

[0042] Figure 3 A schematic analog diagram from a second perspective of a clamp structure provided in one embodiment of this disclosure;

[0043] Figure 4 A schematic analog diagram from a third perspective of a clamp structure provided in this disclosure;

[0044] Figure 5 A schematic analog diagram from a fourth perspective of a clamp structure provided in this disclosure;

[0045] Figure 6 for Figure 5 The diagram shows a schematic cross-sectional view of the clamp structure along the AA direction.

[0046] Figure 7 for Figure 6 A schematic enlarged view of a portion of region B in the middle;

[0047] Figure 8 A schematic application scenario diagram of a first state of a clamp structure of an embodiment provided by the present disclosure;

[0048] Figure 9 A schematic application scenario cross-sectional view of a first state of a clamp structure of an embodiment provided by the present disclosure;

[0049] Figure 10 A schematic application scenario diagram of a second state of a clamp structure of an embodiment provided by the present disclosure;

[0050] Figure 11 A schematic application scenario diagram of a third state of a clamp structure of an embodiment provided by the present disclosure;

[0051] Figure 12 A schematic application scenario diagram of a clamp structure of another embodiment provided by the present disclosure.

[0052] Wherein, Figures 1 to 9 The correspondence between the reference signs and the component names in the accompanying drawings is as follows:

[0053] 10' valve body to be machined; 11' first end flange; 12' second end flange; 13' main body; 101' inner hole; 102' valve rod hole; 103' valve seat sealing surface;

[0054] 10 clamp structure; 100 first support table; 200 connecting arm; 300 second support table; 400 first transmission assembly; 500 second transmission assembly; 600 second positioning member; 700 first limiting member;

[0055] 410 hydraulic cylinder; 411 piston rod; 420 connecting rod mechanism; 421 first connecting rod; 422 second connecting rod; 423 third connecting rod;

[0056] 510 operating member; 520 screw mechanism; 521 transmission nut; 522 transmission screw; 523 screw support. DETAILED DESCRIPTION

[0057] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0058] Need to explain, the so-called "three eccentric" of the three eccentric butterfly valve is that the valve body, valve seat and butterfly plate are structurally offset from the same center, thereby forming a special eccentric design. This eccentric design makes the three eccentric butterfly valve have unique advantages in fluid control, such as better sealing performance, higher stability, and longer service life, etc., while making the three eccentric butterfly valve operation more flexible and able to adapt to various complex fluid control requirements.

[0059] As shown in Figure 1 The valve body of the three eccentric butterfly valve generally includes a main body 13' in a substantially circular tube shape and a first end flange 11' and a second end flange 12' provided at both ends of the main body 13'; Figure 1 The medium size a, size b and size β schematically show the three eccentric designs of the three eccentric butterfly valve, the center line C1 schematically represents the valve center line of the three eccentric butterfly valve, the center line C2 schematically represents the valve rod axis and the valve rod hole 102' axis, the center line C3 schematically represents the cone axis corresponding to the valve seat sealing surface 103', and the center line S1 schematically represents the cone profile corresponding to the valve seat sealing surface 103'. Among them, the size a represents the offset amount of the valve rod axis and the disc axis of the three eccentric butterfly valve, that is, the valve seat sealing surface 103' or the butterfly plate thickness direction bisector of the three eccentric butterfly valve and the valve rod axis exist relative eccentric; size b represents the offset amount of the valve rod axis and the valve center line of the three eccentric butterfly valve, that is, the valve rod axis and the center line of the valve body passage of the three eccentric butterfly valve exist relative eccentric; size β represents that the rotation axis of the valve seat and the valve center line form an angle of deflection, that is, the cone axis corresponding to the conical surface-shaped valve seat sealing surface 103' and the valve center line are relatively eccentric.

[0060] Based on the foregoing structural design, it is not difficult to understand that the valve body of the three eccentric butterfly valve has more rotary surfaces, and the axes of some rotary surfaces have eccentric or angle relationships, so that when cutting the valve body of the three eccentric butterfly valve, it is often difficult to complete the cutting of each surface in one valve body posture. Therefore, in the related art, a corresponding fixture is usually configured for each process, so that the posture of the valve body after being clamped and positioned by each fixture can adapt to the tool action of the corresponding process, thereby resulting in the need to equip more fixtures when cutting the foregoing valve body, the workload of clamping and positioning the workpiece is extremely large, and the improvement of the machining efficiency of the three eccentric butterfly valve is limited.

[0061] In view of this, as Figures 2 to 9As shown, according to the embodiment of the present disclosure, a fixture structure 10 for cutting processing of a three-eccentric butterfly valve body is provided, comprising: a first support table 100, configured to be arranged on a worktable of a machine tool; a connecting arm 200, hinged to the first support table 100, the connecting arm 200 being adapted to rotate relative to the first support table 100 about a first direction; a second support table 300, arranged on the connecting arm 200, the second support table 300 being adapted to slide relative to the connecting arm 200 along a second direction, an axis of the second support table 300 extending along a third direction; a first transmission assembly 400, connected to the connecting arm 200, for driving the connecting arm 200 to rotate relative to the first support table 100; and a second transmission assembly 500, connected to the second support table 300, for driving the second support table 300 to slide relative to the connecting arm 200; wherein one end of the second support table 300 in the axial direction is used to place a valve body 10' to be processed, and the first direction, the second direction and the third direction are perpendicular to each other.

[0062] The clamp structure 10 for cutting processing of the valve body of the three-eccentric butterfly valve provided by the embodiments of the present disclosure comprises the first support table 100, the connecting arm 200, the second support table 300, the first transmission assembly 400 and the second transmission assembly 500. The first support table 100 can be arranged on the worktable of a machine tool in actual application, so that the first support table 100 can rotate synchronously with the worktable when the worktable is running. The connecting arm 200 is hinged to the first support table 100, and the connecting arm 200 is adapted to rotate relative to the first support table 100 in a first direction. The second support table 300 is slidingly arranged on the connecting arm 200, and the second support table 300 is adapted to slide relative to the connecting arm 200 in a second direction. The second support table 300 can be in the shape of a rotary body, and the extending direction of the axis of the second support table 300 is parallel to a third direction. One end of the second support table 300 in the axial direction is used to place the valve body 10' to be processed. The first direction, the second direction and the third direction are perpendicular to each other. The first transmission assembly 400 can drive the connecting arm 200 to rotate relative to the first support table 100 when the first transmission assembly 400 is running. The second transmission assembly 500 can drive the second support table 300 to slide relative to the connecting arm 200 when the second transmission assembly 500 is running. In this way, on the one hand, the first support table 100 can drive the connecting arm 200, the second support table 300 and the valve body 10' to be processed placed on the second support table 300 to rotate synchronously when the worktable is running, so as to facilitate the valve body 10' to be processed to cooperate with the action of the cutting tool of the machine tool, and realize the surface cutting processing of the valve body 10' to be processed. On the other hand, the second support table 300 can have relatively rich movement freedom. The clamp structure 10 can flexibly adjust the position and posture of the valve body 10' to be processed relative to the worktable by adjusting the rotation amount of the connecting arm 200 relative to the first support table 100 and the sliding amount of the second support table 300 relative to the connecting arm 200, so as to facilitate the adjustment of the position and posture relationship between the axis of the rotary surface to be processed on the valve body 10' to be processed and the rotation axis of the worktable according to the cutting processing procedure, so that the rotation action of the rotary surface to be processed under the driving of the worktable is adapted to the action of the cutting tool of the corresponding procedure. In this way, the clamp structure 10 can adjust the position and posture of the second support table 300 relative to the worktable for multiple times during use, so that the rotation actions of multiple rotary surfaces to be processed of the valve body 10' to be processed are sequentially adapted to the actions of the cutting tools of the corresponding procedures, which can avoid frequent clamp replacement and workpiece clamping work during processing procedure switching, is beneficial to reducing the clamp usage amount of the valve body processing of the three-eccentric butterfly valve, saving the processing cost of the valve body, and improving the processing efficiency of the three-eccentric butterfly valve.

[0063] It should be noted that in actual application, the aforementioned clamp structure 10 can be arranged on a machine tool or used as a component of a machine tool, and the machine tool can be, but is not limited to, a numerical control grinding and turning composite machine tool or a composite machining center, etc., and can be used for machining the valve body of a three-eccentric butterfly valve, and used as a clamp for the valve body 10' to be machined. Figure 6 and Figure 8 The direction F1, the direction F2 and the direction F3 in the above are respectively used to schematically represent the first direction, the second direction and the third direction; Figure 4 and Figure 6 The center line T1 and the center line T2 in the above are respectively used to schematically represent the axis of the first support table 100 and the axis of the second support table 300.

[0064] For example, when the aforementioned clamp structure 10 is arranged on the aforementioned machine tool and participates in the cutting machining of the aforementioned valve body 10' to be machined, the machine tool can be a numerical control grinding and turning composite machine tool, that is, the machine tool can realize machining processes such as grinding, turning, milling, drilling, boring, etc. The first support table 100 can be fixedly arranged on the workbench of the machine tool, and the workbench can generate rotation around its own axis when in operation. The first support table 100 can be in the shape of a rotary body and coaxially arranged with the workbench, so that when the workbench rotates, the first support table 100 can rotate coaxially with the workbench, which is beneficial to improve the stability of the clamp structure 10 when following the rotation of the workbench. The end face of the second end flange 12' of the valve body 10' to be machined can be fixedly arranged at one end in the axial direction of the second support table 300, and the outer circle of the second end flange 12' is adjusted to be coaxial with the second support table 300, and the axis of the valve rod hole 102' to be machined is adjusted to be parallel to the first direction. It can be understood that the axial distance between the first end flange 11' and the valve seat sealing surface 103' to be machined is less than the axial distance between the second end flange 12' and the valve seat sealing surface 103' to be machined, so that through the aforementioned mounting mode, the first end flange 11' and the valve seat sealing surface 103' to be machined can be relatively far away from the second support table 300, and thus the cutting machining of the valve seat sealing surface 103' to be machined and the inner hole 101' to be machined on the first end flange 11' can be facilitated. The first end flange 11', the second end flange 12' and the main body 13' are coaxial, the inner hole 101' to be machined is coaxial with the first end flange 11', and the axis of the first end flange 11', the second end flange 12' and the main body 13' is the axis shown by the center line C1. For example, Figure 10As shown, when machining the aforementioned inner hole 101', the position of the second support platform 300 can be adjusted by the first transmission assembly 400 and the second transmission assembly 500 so that the axis of the second support platform 300 coincides with the axis of the worktable. This allows the axis of the aforementioned inner hole 101' to coincide with the axis of the worktable. Based on this, when the worktable is running, the valve body 10' to be machined can rotate around the axis of the aforementioned inner hole 101' to facilitate the turning of the aforementioned inner hole 101'. Figure 11 As shown, during the machining of the aforementioned valve stem hole 102', the position of the second support platform 300 can be adjusted by the first transmission assembly 400 and the second transmission assembly 500, so that the axis of the second support platform 300 is parallel to the axis of the worktable and has a certain offset. The aforementioned offset can be determined according to... Figure 1 The design value of the intermediate dimension b is determined so that the axis of the aforementioned valve stem hole 102' to be machined can be accordingly aligned. Figure 11 The center line C2 represents the axis of the aforementioned valve stem hole 102' and the axis of the worktable. Figure 11 The intersection of the center lines D1 and D2 (which can represent the axis of the aforementioned worktable) is parallel and has an offset dimension b. Based on this, it is convenient for the machine tool to perform boring of the aforementioned valve stem hole 102' using a boring tool. It is understood that the number of the aforementioned valve stem holes 102' is usually two. Therefore, in actual machining, the two aforementioned valve stem holes 102' can be machined sequentially. That is, after completing the machining of one valve stem hole 102', the worktable can be controlled to rotate 180° before machining the other valve stem hole 102'. It should be noted that the aforementioned valve seat sealing surface 103' and the aforementioned valve center line are parallel to each other and have an offset dimension b. Figure 1 In addition to the angular offset shown by the medium dimension β, there is usually also a certain amount of distance offset, thus as... Figure 9 As shown, when machining the valve seat sealing surface 103' to be machined, the position of the second support platform 300 can be adjusted first by the first transmission component 400 and the second transmission component 500 so that the axis of the second support platform 300 forms a certain angle with the axis of the worktable. The aforementioned angle can be determined according to the design value of the aforementioned dimension β. Then, the position of the second support platform 300 is adjusted by the second transmission component 500 until the axis of the valve seat sealing surface 103' to be machined coincides with the axis of the worktable. Based on this, when the worktable is running, the valve body 10' to be machined can rotate around the axis of the aforementioned valve seat sealing surface 103' to be machined, so as to facilitate the follow-up grinding of the aforementioned valve seat sealing surface 103' to be machined. It can be understood that the axis of the aforementioned valve seat sealing surface 103' to be machined is also the cone axis corresponding to the valve seat sealing surface 103'. The aforementioned follow-up grinding refers to a grinding process in which both the grinding wheel and the worktable rotate.

[0065] It can be understood that the aforementioned clamp structure 10 can have an initial working state, in which the axis of the first support table 100 coincides with the axis of the second support table 300. As the angle position of the connecting arm 200 in the aforementioned initial working state is taken as a 0° position, the maximum rotation angle of the connecting arm 200 relative to the aforementioned 0° position can be set according to actual requirements, and for example, the aforementioned maximum rotation angle can be greater than 0° and less than or equal to 20°, such as but not limited to 12°, 15° or 18°, etc.

[0066] It can be understood that the structural parameters of the aforementioned second support table 300 can be set according to actual requirements, for example, can be set according to the specification range of the valve body 10’ to be machined; for example, the aforementioned second support table 300 is suitable for supporting the valve body 10’ of a triple offset butterfly valve with a specification less than or equal to 48 inches, and accordingly, the maximum load of the aforementioned second support table 300 can be set to be greater than or equal to 8t.

[0067] It can be understood that based on the setting of the aforementioned first transmission assembly 400 and the second transmission assembly 500, the motion stability and accuracy of the connecting arm 200 and the second support table 300 can be improved accordingly, which is beneficial to ensure the cutting machining accuracy of the valve body. The specific transmission form of the aforementioned first transmission assembly 400 and the aforementioned second transmission assembly 500 can be set according to actual requirements, and the aforementioned first transmission assembly 400 and the aforementioned second transmission assembly 500 can be electrically driven or manually driven or hydraulically driven, and the specific transmission form can be set according to actual requirements.

[0068] For example, one end of the aforementioned connecting arm 200 can be hinged at the edge of the first support table 100, and one end of the aforementioned second support table 300 in the axial direction can be slidably arranged on one side of the aforementioned connecting arm 200.

[0069] As shown in Figure 4 , Figure 6 , Figure 8 and Figure 9 , in some examples, the first transmission assembly 400 includes: a hydraulic cylinder 410 arranged at the first support table 100; a connecting rod mechanism 420 transmissionally connected between the hydraulic cylinder 410 and the connecting arm 200; wherein the hydraulic cylinder 410 is used to drive the connecting arm 200 to rotate relative to the first support table 100 through the connecting rod mechanism 420.

[0070] In the technical solution, the first transmission assembly 400 can include the hydraulic cylinder 410 and the connecting rod mechanism 420. Based on the above arrangement, the first transmission assembly 400 can drive the connecting rod mechanism 420 to move through the hydraulic cylinder 410, and in turn drive the connecting arm 200 to rotate relative to the first support table 100 in the first direction. The power output stability of the hydraulic cylinder 410 is good and is suitable for large load driving, so that the first transmission assembly 400 is suitable for driving the connecting arm 200, the second support table 300 and the heavy valve body 10' to be processed to overturn, which is beneficial to the large-scale valve body processing of the clamp structure 10. In addition, the transmission stability of the connecting rod mechanism 420 is good and the manufacturing and maintenance cost is relatively low, which is beneficial to reducing the use cost of the first transmission assembly 400 while ensuring the rotation stability of the connecting arm 200.

[0071] It can be understood that the hydraulic oil input end and the hydraulic oil output end of the hydraulic cylinder 410 can be connected to the hydraulic system of the machine tool in actual application, so as to run under the driving of the hydraulic system. For example, the hydraulic oil input end and the hydraulic oil output end of the hydraulic cylinder 410 can be provided with quick connectors, which are suitable for detachable connection with the oil supply pipe and the oil return pipe of the hydraulic system.

[0072] For example, the hydraulic cylinder 410 can be a self-locking hydraulic cylinder 410, which is beneficial to keeping the position stable after the connecting arm 200 is rotated in place.

[0073] As shown in FIG. 1, Figure 6 In some examples, the connecting rod mechanism 420 includes a first connecting rod 421 having a first rod end and a second rod end, the first rod end being hinged to the piston rod 411 of the hydraulic cylinder 410; a second connecting rod 422 having a third rod end and a fourth rod end, the third rod end being hinged to the second rod end, and the fourth rod end being hinged to the connecting arm 200; and a third connecting rod 423 having a fifth rod end and a sixth rod end, the fifth rod end being hinged to the second rod end, and the sixth rod end being hinged to the first support table 100.

[0074] In the technical solution, the connecting rod mechanism 420 can include the first connecting rod 421, the second connecting rod 422, and the third connecting rod 423. Based on the foregoing arrangement, the connecting rod mechanism 420 can receive power output by the piston rod 411 through the first connecting rod 421, and the first connecting rod 421 can move under the drive of the piston rod 411. Accordingly, the first connecting rod 421 can drive the second connecting rod 422 and the third connecting rod 423 to rotate relatively during the movement, so as to increase or decrease the distance between the fourth rod end and the sixth rod end, and further drive the connecting arm 200 to rotate relative to the first support table 100, so as to realize the angle adjustment of the second support table 300. When the position of the piston rod 411 is locked, the first connecting rod 421, the second connecting rod 422, and the connecting arm 200 can form a triangular structure, and the first connecting rod 421, the third connecting rod 423, and the first support table 100 can also form a triangular structure, thereby improving the stability of the second support table 300 when hovering at a certain angle position, and facilitating the improvement of the position accuracy of the valve body 10' during the machining process, thereby providing protection for the machining quality of the valve body 10'.

[0075] It can be understood that the rotation shaft directions of the first connecting rod 421, the second connecting rod 422, and the third connecting rod 423 are parallel to the first direction.

[0076] In some feasible examples, the length of the connecting arm 200 can be greater than or equal to the radius of the outer peripheral wall of the second support table 300, so as to prolong the force arm when the connecting arm 200 is driven to rotate by the connecting rod mechanism 420, thereby reducing the difficulty of overturning the connecting arm 200 by the first transmission assembly 400, enhancing the carrying capacity and driving capacity of the clamp structure 10, and facilitating the posture adjustment of the valve body 10' with greater weight by the clamp structure 10.

[0077] For example, the length of the connecting arm 200 can be, but is not limited to, 1 times, 1.5 times, 1.8 times, 2 times, or 2.5 times the radius of the outer peripheral wall of the second support table 300, and the like.

[0078] In some examples, the number of the connecting rod mechanisms 420 is multiple, and the multiple connecting rod mechanisms 420 are arranged at intervals along the first direction.

[0079] In the technical solution, multiple groups of the connecting rod mechanisms 420 can be arranged in parallel, thereby improving the structural reliability of the first transmission assembly 400, facilitating the improvement of the carrying performance of the first transmission assembly 400, and further enhancing the adaptability of the clamp structure 10 to the machining of large valve bodies.

[0080] For example, Figure 4 , Figures 7 to 9As shown, in some examples, the second transmission assembly 500 includes: a lead screw mechanism 520, which is driven between the connecting arm 200 and the second support platform 300; and an operating member 510, which is driven between the lead screw mechanism 510; wherein the operating member 510 is used to drive the second support platform 300 to slide relative to the connecting arm 200 through the lead screw mechanism 520.

[0081] In this technical solution, the second transmission assembly 500 may include the aforementioned operating element 510 and the aforementioned lead screw mechanism 520. Based on the aforementioned configuration, the second transmission assembly 500 can be a manual mechanism. Accordingly, the operator can drive the lead screw mechanism 520 to move by operating the operating element 510, thereby causing the second support platform 300 to slide relative to the connecting arm 200. The transmission ratio of the lead screw mechanism 520 is stable and suitable for fine displacement output. Thus, the second transmission mechanism allows the operator to manually adjust the sliding amount of the second support platform 300, which is beneficial for achieving precise control of the sliding amount of the second support platform 300. This, in turn, helps to improve the positional accuracy of the valve body 10' to be processed during the processing, and provides a guarantee for the processing quality of the valve body 10'.

[0082] like Figure 7 As shown, in some examples, the lead screw mechanism 520 includes: a transmission nut 521, fixedly mounted on the connecting arm 200; a transmission screw 522, threadedly connected to the transmission nut 521, the axis of the transmission screw 522 extending along a second direction, and an operating member 510 for driving the transmission screw 522 to rotate relative to the transmission nut 521; and a screw support 523, fixedly mounted on the second support platform 300, with the transmission screw 522 rotatably mounted on the screw support 523.

[0083] In this technical solution, the lead screw mechanism 520 may include the aforementioned transmission nut 521, the aforementioned transmission screw 522, and the aforementioned screw support 523. Based on the aforementioned configuration, when the transmission screw rotates relative to the transmission nut 521, it can generate displacement along the second direction, thereby causing the second support platform 300 to slide relative to the connecting arm 200. This facilitates precise control of the sliding amount of the second support platform 300, which in turn helps improve the positional accuracy of the valve body 10' to be processed during the processing, thus ensuring the processing quality of the valve body 10'.

[0084] For example, the aforementioned operating member 510 may include a rotary rod, which is rotatably disposed on the aforementioned screw support 523. The aforementioned transmission screw 522 is connected to the aforementioned rotary rod in a transmission manner, and the aforementioned rotary rod is used to drive the aforementioned transmission screw 522 to rotate.

[0085] In some examples, the screw support 523 and the second support platform 300 are an integral structure.

[0086] In the technical solution, the screw support 523 and the second support table 300 are in an integrated structure, so that on the one hand, the assembly work of the screw support 523 and the second support table 300 can be reduced during the process of manufacturing the clamp structure 10, and thus the assembly difficulty of the clamp structure 10 can be reduced; on the other hand, the risk of loosening of the screw support 523 relative to the second support table 300 can be reduced, and thus the synchronous action of the second support table 300 and the transmission screw 522 is facilitated, and the control precision of the sliding amount of the second support table 300 is ensured.

[0087] In some examples, the second transmission assembly 500 further comprises a gear mechanism transmissionally connected between the transmission screw 522 and the operating member 510, and the operating member 510 is configured to drive the transmission screw 522 to rotate relative to the transmission nut 521 through the gear mechanism; and the transmission ratio of the gear mechanism is greater than 1.

[0088] In the technical solution, the second transmission assembly 500 can further comprise the gear mechanism. Based on the foregoing arrangement, the operating member 510 can drive the lead screw mechanism 520 to operate through the gear mechanism, and the transmission ratio of the gear mechanism is greater than 1, that is, the gear mechanism is adapted to decelerate and increase the torque of the power output by the operating member 510 and then transmit the power to the lead screw mechanism 520, so that when the operating member 510 is given a certain power, the action amplitude of the transmission screw in the second direction can be reduced, or when the displacement speed of the transmission screw in the second direction is certain, the power required by the operating member 510 can be reduced, and thus the operation convenience of the second transmission assembly 500 can be improved, and the control precision of the sliding amount of the second support table 300 can be improved, and the machining quality of the valve body 10' to be machined is ensured.

[0089] As shown in FIG. 1, Figure 12 In some examples, the clamp structure 10 further comprises:

[0090] a first limiting member detachably arranged between the first support table 100 and the second support table 300, configured to limit the rotation of the connecting arm 200 relative to the first support table 100; and / or

[0091] a second limiting member detachably arranged between the second support table 300 and the connecting arm 200, configured to limit the sliding of the second support table 300 relative to the connecting arm 200.

[0092] In the technical scheme, the clamp structure 10 can further include the first limiting piece. Based on the arrangement, when the rotation amount of the connecting arm 200 relative to the first support table 100 reaches the target rotation amount, the first limiting piece can be arranged between the first support table 100 and the second support table 300 to limit the rotation of the connecting arm 200 relative to the first support table 100, thereby facilitating to ensure the position stability of the second support table 300 when hovering at a certain angle position, and providing guarantee for the machining quality of the valve body 10' to be machined.

[0093] In the technical scheme, the clamp structure 10 can further include the second limiting piece. Based on the arrangement, when the sliding amount of the second support table 300 relative to the connecting arm 200 reaches the target sliding amount, the second limiting piece can be arranged between the connecting arm 200 and the second support table 300 to prevent the second support table 300 from sliding relative to the connecting arm 200, thereby being capable of providing guarantee for the machining quality of the valve body 10' to be machined.

[0094] It can be understood that in the technical scheme, the clamp structure 10 can simultaneously include the first limiting piece and the second limiting piece.

[0095] As shown in Figure 12 exemplarily, the first limiting piece can be an angle-limiting block, the angle-limiting block has a first support surface and a second support surface, and a limiting included angle is formed between the first support surface and the second support surface. In actual application, the number of angle-limiting blocks can be multiple, and the limiting included angles of the multiple angle-limiting blocks are different. When the rotation amount of the connecting arm 200 relative to the first support table 100 reaches the target rotation amount, the angle-limiting block with the limiting included angle equal to the target rotation amount can be placed between the first support table 100 and the second support table 300, so that the first support surface abuts against the first support table 100, and the second support surface abuts against the second support table 300, thereby realizing the limitation of the rotation of the connecting arm 200 relative to the first support table 100. It can be understood that in actual application, the number of angle-limiting blocks with the same limiting included angle can be multiple, so that when the rotation amount of the connecting arm 200 relative to the first support table 100 reaches the target rotation amount, multiple angle-limiting blocks with the limiting included angle equal to the target rotation amount can be placed between the first support table 100 and the second support table 300, so as to improve the supporting effect. Correspondingly, the multiple angle-limiting blocks with the same limiting included angle can be symmetrically arranged about the symmetric surface of the connecting arm in the first direction.

[0096] Exemplarily, the second limiting member can be a fixed-length clamping block, the fixed-length clamping block has a third support surface and a fourth support surface which are away from each other, and a third limiting surface and a fourth limiting surface form a limiting distance therebetween. In actual application, the number of the fixed-length clamping blocks can be multiple, and the limiting distances of the multiple fixed-length clamping blocks are different. Correspondingly, the second support table 300 and the connecting arm 200 can have a first matching surface and a second matching surface respectively, the first matching surface and the second matching surface are arranged oppositely along the second direction, the fixed-length clamping block can be arranged between the first matching surface and the second matching surface, and the third support surface is used for abutting against the first matching surface, and the fourth support surface is used for abutting against the second matching surface. Based on this, in the use process, the distance between the first matching surface and the second matching surface in the current state can be a first distance, and the distance between the first matching surface and the second matching surface when the sliding amount of the second support table 300 relative to the connecting arm 200 reaches a target sliding amount from the current state can be a second distance. If the first distance is less than or equal to the second distance, the fixed-length clamping block with a limiting distance equal to the second distance can be clamped between the first matching surface and the second matching surface after the second support table 300 reaches the target sliding amount. If the first distance is greater than the second distance, the fixed-length clamping block with a limiting distance equal to the second distance can be arranged between the first matching surface and the second matching surface before the second support table 300 reaches the target sliding amount, and the first matching wall is fixedly connected to the third matching wall, or the second matching wall is fixedly connected to the fourth matching wall. The second support table 300 is controlled to slide until the fixed-length clamping block is clamped between the first matching surface and the second matching surface, thereby facilitating the quantitative sliding of the second support table 300 by the operator.

[0097] As Figures 1 to 6 , Figure 8 and Figure 9 indicate, in some examples, the clamp structure 10 further comprises:

[0098] a first positioning member arranged on the first support table 100, used to limit the relative position of the workbench and the first support table 100; and / or

[0099] a second positioning member 600 arranged on the second support table 300, used to limit the relative position of the valve body 10' to be machined and the second support table 300.

[0100] In the technical scheme, the fixture structure 10 can further comprise the first positioning member. Based on the arrangement, when the first support table 100 is placed on the worktable of the machine tool, the fixture structure 10 can position the first support table 100 and the worktable by using the first positioning member to limit the positional relationship between the first support table 100 and the worktable, thereby ensuring the installation position accuracy of the first support table 100 on the worktable and facilitating the machining accuracy of the valve body 10'.

[0101] In the technical scheme, the fixture structure 10 can further comprise the second positioning member 600. Based on the arrangement, when the valve body 10' to be machined is placed on the second support table 300, the fixture structure 10 can position the second support table 300 and the valve body 10' to be machined by using the second positioning member 600 to limit the positional relationship between the second support table 300 and the valve body 10' to be machined, thereby ensuring the installation position accuracy of the valve body 10' to be machined on the second support table 300 and facilitating the machining accuracy of the valve body 10'.

[0102] It can be understood that in the technical scheme, the fixture structure 10 can simultaneously comprise the first positioning member and the second positioning member 600.

[0103] Exemplarily, the first positioning member can be a first positioning ring and positioning keys. The first positioning ring is arranged at one end in the axial direction of the first support table 100 and coaxially arranged with the first support table 100. The number of the positioning keys is plural, and the plural positioning keys are uniformly arranged along the circumference of the positioning ring. Correspondingly, the worktable can be provided with an annular groove and key grooves. The annular groove is matched with the first positioning ring, the key grooves are one-to-one matched with the positioning keys, and the key grooves are matched with the positioning keys. The annular groove is coaxial with the rotation axis of the worktable. When the first support table 100 is placed on the worktable of the machine tool, the positioning ring can be inserted into the annular groove, and the positioning keys can be one-to-one inserted into the key grooves. It can be understood that the fixture structure 10 can further comprise a fastening bolt, and the fastening bolt is used to fasten the worktable and the first support table 100.

[0104] Exemplarily, the second positioning member 600 can comprise a second positioning ring. The second positioning ring is arranged at one end in the axial direction of the second support table 300 and coaxially arranged with the second support table 300. The second positioning ring is used to positionally cooperate with the second end flange 12' to coaxially arrange the second end flange 12' and the second support table 300.

[0105] In some possible examples, the clamp structure 10 further comprises a clamping mechanism arranged on the second support table 300, used to lock or release the valve body 10' to be machined; when the clamping mechanism locks the valve body 10' to be machined, the position of the valve body 10' to be machined relative to the second support table 300 is fixed; when the clamping mechanism releases the valve body 10' to be machined, the valve body 10' to be machined can move relative to the second support table 300.

[0106] In some possible examples, the first support table 100 is provided with a first positioning hole coaxially arranged with the first support table; the second support table 300 is provided with a second positioning hole coaxially arranged with the second support table.

[0107] In the present disclosure, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mount", "connect", "connect", "fix" and the like should be broadly understood, for example, "connect" can be fixed connection, can also be detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0108] In the description of the present disclosure, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present disclosure and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, cannot be understood as a limitation on the present disclosure.

[0109] In the description of the present disclosure, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0110] The above is only the preferred embodiment of the present disclosure, and is not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A fixture structure for machining the body of a triple eccentric butterfly valve, characterized in that, include: The first support platform is used to be installed on the worktable of the machine tool; A connecting arm is hinged to the first support platform, and the connecting arm is adapted to rotate relative to the first support platform about a first direction. A second support platform is disposed on the connecting arm. The second support platform is adapted to slide relative to the connecting arm in a second direction, and the axis of the second support platform extends in a third direction. A first transmission component is connected to the connecting arm and is used to drive the connecting arm to rotate relative to the first support platform. The second transmission component is connected to the second support platform and is used to drive the second support platform to slide relative to the connecting arm. The second support platform has one axial end for placing the valve body to be processed, and the first direction, the second direction, and the third direction are perpendicular to each other.

2. The fixture structure for machining the body of a triple eccentric butterfly valve according to claim 1, characterized in that, The first transmission assembly includes: A hydraulic cylinder is mounted on the first support platform; A linkage mechanism is used for transmission between the hydraulic cylinder and the connecting arm; The hydraulic cylinder is used to drive the connecting arm to rotate relative to the first support platform via the linkage mechanism.

3. The fixture structure for machining the body of a triple eccentric butterfly valve according to claim 2, characterized in that, The linkage mechanism includes: The first connecting rod has a first rod end and a second rod end, the first rod end being hinged to the piston rod of the hydraulic cylinder; The second link has a third link end and a fourth link end, wherein the third link end is hinged to the second link end and the fourth link end is hinged to the connecting arm; The third link has a fifth link end and a sixth link end, the fifth link end being hinged to the second link end, and the sixth link end being hinged to the first support platform.

4. The fixture structure for machining the body of a triple eccentric butterfly valve according to claim 2, characterized in that, The number of linkage mechanisms is multiple, and the multiple linkage mechanisms are arranged at intervals along the first direction.

5. The fixture structure for machining the body of a triple eccentric butterfly valve according to claim 1, characterized in that, The second transmission assembly includes: A lead screw mechanism is connected between the connecting arm and the second support platform for transmission. The operating component is connected to the lead screw mechanism via a transmission connection. The operating component is used to drive the second support platform to slide relative to the connecting arm via the lead screw mechanism.

6. The fixture structure for machining the body of a triple eccentric butterfly valve according to claim 5, characterized in that, The lead screw mechanism includes: A transmission nut is fixedly mounted on the connecting arm; A transmission screw is threadedly connected to the transmission nut, the axis of the transmission screw extends along the second direction, and the operating element is used to drive the transmission screw to rotate relative to the transmission nut; A screw support is fixedly mounted on the second support platform, and the transmission screw is rotatably mounted on the screw support.

7. The fixture structure for machining the body of a triple eccentric butterfly valve according to claim 6, characterized in that, The screw support and the second support platform are an integral structure.

8. The fixture structure for machining the body of a triple eccentric butterfly valve according to claim 6, characterized in that, The second transmission assembly also includes: A gear mechanism is connected between the transmission screw and the operating member, and the operating member is used to drive the transmission screw to rotate relative to the transmission nut through the gear mechanism. The gear mechanism has a transmission ratio greater than 1.

9. The fixture structure for machining the body of a triple eccentric butterfly valve according to any one of claims 1 to 8, characterized in that, Also includes: The first limiting member is detachably disposed between the first support platform and the second support platform to restrict the rotation of the connecting arm relative to the first support platform; and / or The second limiting member is detachably disposed between the second support platform and the connecting arm to restrict the sliding of the second support platform relative to the connecting arm.

10. The fixture structure for machining the body of a triple eccentric butterfly valve according to any one of claims 1 to 8, characterized in that, Also includes: A first positioning element is disposed on the first support platform to limit the relative position of the worktable and the first support platform; and / or The second positioning element is disposed on the second support platform and is used to limit the relative position of the valve body to be processed and the second support platform.

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