Machining device for valve rod of rotary ball valve

Abstract

The invention relates to the technical field of cutting, and particularly discloses a rotary ball valve rod machining device which is characterized in that a groove is formed in the inner side face of a clamping piece, an anti-skid pad is arranged in the groove, a cutting assembly comprises a rotating shaft and two cutting wheels, the rotating shaft can move in the length direction of a base, and the cutting wheels can rotate synchronously with the rotating shaft and can move in the axial direction of the rotating shaft; the positioning plate is located on the outer side of the positioning piece and is in sliding connection with the clamping piece, one end of the positioning plate is fixedly connected with the positioning piece, the other end of the positioning plate is arranged on the outer side of the cutting wheel, and the elastic piece is arranged between the positioning plate and the clamping piece and can apply jacking force to the positioning plate and the positioning piece so that at least part of the positioning piece can stretch into the groove; when the clamped and fixed valve rod deviates leftwards or rightwards, the positioning piece, the positioning plate and the elastic piece can enable the center of the distance between the two cutting wheels to be consistent with the axis of the valve rod all the time, and at the moment, when the valve rod is cut, the cutting precision can be higher.

Description

Technical Field

[0001] The invention relates to the field of cutting technology, in particular to a device for processing a valve stem of a rotary ball valve. Background Art

[0002] The valve stem is a component that realizes valve switching or regulation. It is connected to the actuator or handle on the top and directly drives the valve core to move or rotate on the bottom to realize the valve switching or regulation. When selecting the valve stem material, it must be ensured that it has sufficient strength, good impact toughness, abrasion resistance, corrosion resistance, etc. at the specified temperature. During the processing of the valve stem, it will be cut at one or both ends of the valve stem for subsequent valve installation.

[0003] The patent document with authorization announcement number CN218395942U discloses a precise positioning device for the angle between the cutting edge of a turning tool and a valve core, including a base, a clamping assembly and a positioning adjustment assembly. The patent places the valve core to be processed between two clamping discs, and then starts the operation of the driving motor through a control button. The driving motor drives the threaded rod 2 to rotate, and then the two threaded sleeves 1 are close to each other, so that the two clamping discs can fix the valve core. The rubber pad can play a certain protective role on the valve core during fixation. During the fixing process, when the valve core accidentally falls, the valve core can fall directly into the receiving plate, and the impact force on the receiving plate can be buffered by the damping rod; a laser pen is provided, and the relative position between the turning tool cutting edge and the valve core can be determined according to the wiring harness position of the laser pen, so as to achieve precise positioning between the valve core and the turning tool cutting edge and improve cutting accuracy.

[0004] In the above technical solution, when cutting the workpiece, a rubber pad is provided on the clamping surface of the clamping disc to protect the valve core. However, after long-term use, the rubber pad will be squeezed, deformed or worn, resulting in inaccurate positioning and large cutting errors. Summary of the invention

[0005] The invention provides a device for processing a valve stem of a rotary ball valve, aiming to solve the problem in the related art that a rubber pad may be squeezed, deformed or worn after long-term use, resulting in inaccurate positioning and large cutting errors.

[0006] A device for processing a valve stem of a rotary ball valve comprises a base and two clamping members, wherein the two clamping members are slidably mounted on the upper part of the base along the width direction of the base, grooves are arranged on the opposite inner sides of the two clamping members, and anti-slip pads are arranged in the grooves, and a cutting assembly and two positioning assemblies are also included; The cutting assembly includes a rotating shaft and two cutting wheels. The rotating shaft is rotatably mounted on the upper part of the base, and its axial direction is in the same direction as the width direction of the base. The rotating shaft can move along the length direction of the base. The cutting wheels are mounted on the rotating shaft. The cutting wheels can rotate synchronously with the rotating shaft and can move along the axial direction of the rotating shaft. The two positioning components correspond to the two clamping members respectively, and the positioning components include a positioning member, a positioning plate and an elastic member. The positioning member can fit with the side of the valve stem, the positioning plate is located on the outside of the positioning member and is slidably connected to the clamping member, the positioning plate can move along the width direction of the base, and the positioning plate can be extended and retracted in the length direction of the base. One end of the positioning plate is fixedly connected to the positioning member, and the other end is arranged on the outside of the cutting wheel. The elastic member is arranged between the positioning plate and the clamping member, and can apply a thrust force to the positioning plate and the positioning member so that at least part of the positioning member extends into the groove.

[0007] The beneficial effects of the present invention are as follows: when the anti-slip pad on the clamping part is squeezed, deformed or worn after long-term use, and the valve stem deviates to the left or right after being clamped and fixed, the positioning part, the positioning plate and the elastic part can make the center of the distance between the two cutting wheels always consistent with the axis of the valve stem. At this time, when the valve stem is cut again, the cutting accuracy can be higher.

[0008] Preferably, it also includes two control components, the two control components correspond to the two positioning components respectively, the control component includes a limit plate and a lead screw, one end of the limit plate is arranged between the positioning plate and the cutting wheel, the limit plate can move synchronously with the cutting wheel along the axial direction of the rotating shaft, and the limit plate is rotatably connected to the rotating shaft, the axial direction of the lead screw is in the same direction as the axial direction of the rotating shaft, the lead screw is rotatably connected to the positioning plate, and is threadedly connected to the limit plate.

[0009] Preferably, the two lead screws in the two control assemblies can move closer to or farther away from each other, and the two lead screws can rotate synchronously, which has the effect of facilitating the adjustment of the distance between the two cutting wheels.

[0010] Preferably, a baffle is fixedly provided at the other end of the limit plate, and the baffle is facing the direction between the two clamping members. The limit plate can be extended and retracted in the length direction of the base. The effect is that after the valve stem is clamped and fixed by the two clamping members, the baffle is controlled to stop at the rear end of the valve stem, so that the valve stem can be prevented from moving backward during cutting.

[0011] Preferably, the inner side surface of the baffle is flush with the inner side surface of the cutting wheel. The effect is that when the cutting of one end of the valve stem is completed and the other end is cut, the uncut end is placed at the front end. Since the inner side surface of the baffle is flush with the inner side surface of the cutting wheel, there is no need to stop the baffle against the rear end surface of the valve stem. The baffle can be fit against the cutting surface after previous cutting, and the baffle can be stopped against the step at the cutting surface position, which can avoid the valve stem from moving backward during cutting.

[0012] Preferably, it also includes a driving component 1, which includes a driving member 1 and a transmission structure. The driving member 1 is installed on the base and can drive one of the clamping members to move along the width direction of the base. The transmission structure includes rack 1, rack 2 and a gear. The rack 1 and rack 2 are respectively fixedly connected to the bottom of the two clamping members, and the gear is rotatably installed between the rack 1 and the rack 2, and is meshed with the rack 1 and the rack 2 at the same time.

[0013] Preferably, it also includes a second driving component, which includes a movable frame and a second driving member. The movable frame is slidably mounted on the base, the rotating shaft is rotatably connected to the movable frame, and the second driving member can drive the movable frame to move along the length direction of the base.

[0014] Preferably, a slide groove is provided on the rotating shaft, and the slide groove extends along the axial direction of the rotating shaft. A convex strip is fixedly provided on the inner circumferential surface of the cutting wheel, and the convex strip is slidably fitted in the slide groove, which has the effect of enabling the cutting wheel to rotate synchronously with the rotating shaft and enabling the cutting wheel to move along the axial direction of the rotating shaft.

[0015] By adopting the above technical scheme, the beneficial effect of the present invention is as follows: when the anti-slip pad on the clamping part is squeezed, deformed or worn after long-term use, and the valve stem deviates to the left or right after being clamped and fixed, the positioning part, the positioning plate and the elastic part can make the center of the distance between the two cutting wheels always consistent with the axis of the valve stem. At this time, when the valve stem is cut again, the cutting accuracy can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the installation structure of the positioning member of the present invention.

[0018] Figure 3 It is a schematic diagram of the connection structure of the transmission structure of the present invention.

[0019] Figure 4 It is a schematic structural diagram of the lead screw of the present invention.

[0020] Figure 5 It is a schematic structural diagram of another lead screw of the present invention.

[0021] Figure 6 It is a schematic structural diagram of the cutting wheel of the present invention.

[0022] Reference numerals: 1. Base; 11. Valve stem; 2. Clamping piece; 21. Anti-slip pad; 31. rotating shaft; 311. sliding groove; 32. cutting wheel; 321. convex strip; 41. Positioning member; 42. Positioning plate; 421. Plate 1; 422. Plate 2; 43. Elastic member; 51, limit plate; 511, plate three; 512, plate four; 52, lead screw; 521, guide rod; 522, guide groove; 6, baffle; 71, driving member one; 72, rack one; 73, rack two; 74, gear; 81. Driving member 2; 82. Moving frame; 9. Driving member 3. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] like Figures 1 to 6 As shown, the rotary ball valve stem processing device of the embodiment of the present invention includes a base 1, two clamping members 2, a cutting assembly, two positioning assemblies, two control assemblies, a driving assembly 1 and a driving assembly 2.

[0025] For ease of understanding, the width direction of the base 1 is defined as the left-right direction, and the length direction of the base 1 is defined as the front-back direction.

[0026] The two clamping members 2 are slidably installed on the upper part of the base 1 along the width direction of the base 1, and grooves are provided on the opposite inner sides of the two clamping members 2. Anti-slip pads 21 are fixedly arranged in the grooves. Specifically, the clamping members 2 are slidably installed on the upper part of the base 1 in the left and right directions, and the two clamping members 2 can approach or move away from each other. The grooves and the anti-slip pads 21 are both arc-shaped structures.

[0027] The driving assembly 1 includes a driving member 1 71 and a transmission structure. The driving member 1 71 is fixedly mounted on the base 1. The driving member 1 71 can be a hydraulic cylinder, and its output end is fixedly connected to the clamping member 2 on the left. The control of the extension and retraction of the driving member 1 71 can drive the clamping member 2 on the left to move in the left and right directions. The transmission structure includes a rack 1 72, a rack 2 73 and a gear 74. The length directions of the rack 1 72 and the rack 2 73 are both extended in the left and right directions, and the two are arranged in parallel. The rack 1 72 and the rack 2 73 are respectively fixedly connected to the left and right directions. Connected to the bottom of the two clamping members 2, the gear 74 is located between the rack 1 72 and the rack 2 73, and is rotatably connected to the base 1, and the gear 74 is meshed with the rack 1 72 and the rack 2 73 at the same time, so that when the driving member 1 71 drives the left clamping member 2 to move, the meshing between the rack 1 72, the rack 2 73 and the gear 74 can drive the right clamping member 2 to move in the direction opposite to the moving direction of the left clamping member 2, that is, the driving member 1 71 is controlled to extend and retract, so that the two clamping members 2 can be moved closer to or away from each other.

[0028] Furthermore, after the valve stem 11 to be cut is placed between the two clamping members 2, the valve stem 11 can be clamped and fixed by controlling the two clamping members 2 to approach each other.

[0029] The cutting assembly includes a rotating shaft 31 and two cutting wheels 32. The rotating shaft 31 is rotatably mounted on the upper part of the base 1, and its axial direction is in the same direction as the width direction of the base 1. The rotating shaft 31 can move along the length direction of the base 1. The cutting wheels 32 are mounted on the rotating shaft 31. The cutting wheels 32 can rotate synchronously with the rotating shaft 31 and can move along the axial direction of the rotating shaft 31.

[0030] Specifically, the driving component 2 includes a moving frame 82 and a driving member 81. The moving frame 82 is slidably installed on the upper part of the base 1 and can move in the front-to-back direction. The driving member 81 is fixedly installed on the base 1. The driving member 81 can be a hydraulic cylinder, and its output end is fixedly connected to the moving frame 82. The driving member 81 is controlled to be extended and retracted, so as to drive the moving frame 82 to move in the front-to-back direction. The rotating shaft 31 is rotatably installed on the moving frame 82, and its axial direction extends in the left-to-right direction. The two cutting wheels 32 are arranged at intervals in the left-to-right direction and are both installed on the rotating shaft 31. Therefore, the driving member 81 is controlled to be extended and retracted, so as to drive the rotating shaft 31 and the cutting wheel 32 installed on the rotating shaft 31 to move in the front-to-back direction.

[0031] A driving member 3 9 is fixedly mounted on the movable frame 82 . The driving member 3 9 can be a motor, and its output end is fixedly connected to the rotating shaft 31 . The driving member 3 9 is controlled to operate, and can drive the rotating shaft 31 and the cutting wheel 32 mounted on the rotating shaft 31 to rotate.

[0032] Among them, a slide groove 311 is provided on the rotating shaft 31, and the slide groove 311 extends in the left and right direction. A convex strip 321 is fixedly provided on the inner circumference of the cutting wheel 32, and the convex strip 321 slides in the slide groove 311, so that the cutting wheel 32 can slide in the left and right direction, and when the rotating shaft 31 is controlled to rotate, it can drive the cutting wheel 32 to rotate synchronously.

[0033] The two positioning components correspond to the two clamping members 2 respectively. For ease of understanding, the middle direction of the two clamping members 2 is defined as the inner direction, and the direction away from the middle of the two clamping members 2 is defined as the outer direction.

[0034] The positioning assembly includes a positioning member 41, a positioning plate 42 and an elastic member 43. The positioning member 41 can fit with the side of the valve stem 11. The positioning plate 42 is located on the outside of the positioning member 41 and is slidably connected to the clamping member 2. The positioning plate 42 can move along the width direction of the base 1 and can be extended and retracted in the length direction of the base 1.

[0035] Specifically, the two positioning components are arranged at intervals in the left and right directions, the positioning member 41 is arranged on the front side of the corresponding clamping member 2, the positioning plate 42 can slide in the left and right directions, the positioning plate 42 includes plate 1 421 and plate 2 422, plate 1 421 and plate 2 422 are connected by sliding front and back, plate 1 421 is located on the front side of plate 2 422, so that the positioning plate 42 can be extended and retracted in the front and back directions.

[0036] One end of the positioning plate 42 is fixedly connected to the positioning member 41, and the other end is arranged on the outside of the cutting wheel 32. The elastic member 43 is arranged between the positioning plate 42 and the clamping member 2, and can apply a thrust force to the positioning plate 42 and the positioning member 41 so that at least part of the positioning member 41 extends into the groove.

[0037] Specifically, plate two 422 is fixedly connected to the positioning member 41, plate one 421 is located on the outside of the cutting wheel 32, and the elastic member 43 is arranged between plate two 422 and the clamping member 2. The elastic member 43 can be a spring, and its two ends are respectively fixedly connected to plate two 422 and the clamping member 2. When the two clamping members 2 do not clamp the valve stem 11, part of the positioning member 41 extends into the groove under the push of the elastic member 43.

[0038] The two control components correspond to the two positioning components respectively. The control components include a limit plate 51 and a lead screw 52. One end of the limit plate 51 is arranged between the positioning plate 42 and the cutting wheel 32. The limit plate 51 can move synchronously with the cutting wheel 32 along the axial direction of the rotating shaft 31, and the limit plate 51 is rotationally connected to the rotating shaft 31. The axial direction of the lead screw 52 is in the same direction as the axial direction of the rotating shaft 31. The lead screw 52 is rotationally connected to the positioning plate 42 and is threadedly connected to the limit plate 51.

[0039] Specifically, the two control components are arranged at intervals in the left-right direction, the limit plate 51 includes a plate 3 511 and a plate 4 512, the plate 4 512 is connected to the movable frame 82 in a left-right sliding manner, and the plate 4 512 cannot move in the front-back direction, the plate 3 511 and the plate 4 512 are connected in a front-back sliding manner, the plate 3 511 is located at the front side of the plate 4 512, the plate 3 511 can move in the front-back direction, and the plate 3 511 is connected to the lead screw 52 in a threaded transmission. And the plate 3 511 is connected to the cutting wheel 32 in rotation, specifically, a rotating connection hole is provided on the plate 3 511, and the cutting wheel 32 is rotatably installed in the rotating connection hole. The lead screw 52 is connected to the plate 1 421 in rotation, and the lead screw 52 and the plate 1 421 can move synchronously in the left-right direction.

[0040] The two lead screws 52 in the two control assemblies are connected by sliding left and right. Specifically, a guide rod 521 is fixedly connected to the end of one of the lead screws 52, and a guide groove 522 is provided in the other lead screw 52. The guide rod 521 slides in the guide groove 522, so that the two lead screws 52 can approach or move away from each other, and the two lead screws 52 can rotate synchronously. The spiral directions of the threads on the two lead screws 52 are opposite. When the position of the positioning plate 42 remains unchanged, controlling the two lead screws 52 to rotate can drive the two limit plates 51 to approach or move away from each other, thereby driving the two cutting wheels 32 to approach or move away from each other.

[0041] A baffle plate 6 is fixedly provided at the rear end of plate four 512. The baffle plate 6 is located on the inner side of plate four 512, and the inner side surface of the baffle plate 6 is flush with the inner side surface of the cutting wheel 32.

[0042] In the initial state, the cutting wheel 32 is located near the front end of the base 1, the plate 1 421 and the plate 2 422 in the positioning plate 42 are away from each other, and the plate 3 511 and the plate 4 512 in the limiting plate 51 are away from each other.

[0043] When cutting the valve stem 11, first place the valve stem 11 to be cut between the two clamping members 2, and make the baffle 6 stop at the rear end of the valve stem 11, and then control the two clamping members 2 to approach each other to clamp and fix the valve stem 11. At this time, the valve stem 11 will squeeze the positioning member 41, and the elastic member 43 will be compressed. After the valve stem 11 is clamped and fixed, the position of the positioning plate 42 will remain unchanged. Next, the lead screw 52 is controlled to rotate to adjust the distance between the two cutting wheels 32. After the adjustment is completed, the drive member three 9 is controlled to operate, drive the rotating shaft 31 and the cutting wheel 32 installed on the rotating shaft 31 to rotate, and at the same time control the drive member two 81 to extend, drive the movable frame 82, the rotating shaft 31 and the cutting wheel 32 installed on the rotating shaft 31 to move backward, and the cutting wheel 32 can cut the peripheral side surface close to the end of the valve stem 11, and can cut into a plane.

[0044] When the anti-slip pad 21 on the clamping member 2 is squeezed, deformed or worn after long-term use, when the valve stem 11 is clamped and fixed at this time, the valve stem 11 will deviate to the left or right after clamping and fixing. At this time, if the position of the cutting wheel 32 is not corrected in time, the cutting accuracy will be reduced.

[0045] The following is a specific description taking the valve stem 11 deviating to the right as an example.

[0046] After the valve stem 11 is clamped and fixed, when the valve stem 11 deviates to the right, the valve stem 11 will squeeze the right positioning piece 41 and the positioning plate 42 to move to the right, and the left elastic piece 43 will push the left positioning plate 42 and the positioning piece 41 to move to the right. The positioning pieces 41 on both sides of the valve stem 11 will always remain stopped against the valve stem 11. Since the positioning plate 42 is rotatably connected to the lead screw 52, ​​and the lead screw 52 is threadedly connected to the limit plate 51, the two positioning plates 42 moving to the right will drive the two lead screws 52 and the two limit plates 51 to move to the right. Since the limit plate 51 and the cutting wheel 32 move synchronously in the left and right directions, the two cutting wheels 32 will be driven to move to the right, so that the center of the distance between the two cutting wheels 32 can always be consistent with the axis of the valve stem 11. At this time, when the valve stem 11 is cut again, the cutting accuracy can be made higher.

[0047] It is understandable that when the valve stem 11 deviates to the left, the center of the distance between the two cutting wheels 32 can also be kept consistent with the axis of the valve stem 11, which will not be elaborated in detail here.

[0048] In addition, when one end of the valve stem 11 is cut and the other end is cut, the uncut end is placed at the front end. Since the inner side surface of the baffle 6 is flush with the inner side surface of the cutting wheel 32, there is no need to stop the baffle 6 against the rear end surface of the valve stem 11. The baffle 6 can be fit against the cutting surface after the previous cutting, and the baffle 6 can be stopped against the step at the cutting surface position, which can avoid the valve stem 11 from moving backward during cutting.

[0049] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A valve stem processing device for a rotary ball valve, comprising a base and two clamping members, the two clamping members are slidably mounted on the upper part of the base along the width direction of the base, grooves are provided on the opposite inner sides of the two clamping members, and anti-slip pads are provided in the grooves, characterized in that: Also included is a cutting assembly and two positioning assemblies; The cutting assembly includes a rotating shaft and two cutting wheels. The rotating shaft is rotatably mounted on the upper part of the base, and its axial direction is in the same direction as the width direction of the base. The rotating shaft can move along the length direction of the base. The cutting wheels are mounted on the rotating shaft. The cutting wheels can rotate synchronously with the rotating shaft and can move along the axial direction of the rotating shaft. The two positioning components correspond to the two clamping members respectively. The positioning components include a positioning member, a positioning plate and an elastic member. The positioning member can fit with the side of the valve stem. The positioning plate is located on the outside of the positioning member and is slidably connected to the clamping member. The positioning plate can move along the width direction of the base. The positioning plate can be extended and retracted in the length direction of the base. One end of the positioning plate is fixedly connected to the positioning member, and the other end is arranged on the outside of the cutting wheel. The elastic member is arranged between the positioning plate and the clamping member, and can apply a thrust force to the positioning plate and the positioning member so that at least part of the positioning member extends into the groove.

2. The ball valve stem processing device according to claim 1 is characterized in that: It also includes two control components, which correspond to the two positioning components respectively. The control component includes a limit plate and a lead screw. One end of the limit plate is arranged between the positioning plate and the cutting wheel. The limit plate can move synchronously with the cutting wheel along the axial direction of the rotating shaft, and the limit plate is rotatably connected to the rotating shaft. The axial direction of the lead screw is in the same direction as the axial direction of the rotating shaft. The lead screw is rotatably connected to the positioning plate and is connected to the limit plate threaded transmission.

3. The ball valve stem processing device according to claim 2, characterized in that: The two lead screws in the two control assemblies can move closer to or farther from each other, and the two lead screws can rotate synchronously.

4. The device for processing a ball valve stem according to claim 2, characterized in that: A baffle is fixedly arranged at the other end of the limiting plate, and the baffle faces the direction between the two clamping members. The limiting plate can be extended and retracted in the length direction of the base.

5. The device for processing the stem of a rotary ball valve according to claim 4, characterized in that: The inner side of the baffle is flush with the inner side of the cutting wheel.

6. The device for processing a ball valve stem according to claim 1, characterized in that: It also includes a driving component 1, which includes a driving member 1 and a transmission structure. The driving member 1 is installed on the base and can drive one of the clamping members to move along the width direction of the base. The transmission structure includes a rack 1, a rack 2 and a gear. The rack 1 and the rack 2 are respectively fixedly connected to the bottom of the two clamping members. The gear is rotatably installed between the rack 1 and the rack 2, and is meshed with the rack 1 and the rack 2 at the same time.

7. The device for processing a ball valve stem according to claim 1, characterized in that: It also includes a second driving component, which includes a moving frame and a second driving member. The moving frame is slidably mounted on the base, the rotating shaft is rotatably connected to the moving frame, and the second driving member can drive the moving frame to move along the length direction of the base.

8. The device for processing a ball valve stem according to claim 1, characterized in that: A slide groove is arranged on the rotating shaft, and the slide groove extends along the axial direction of the rotating shaft. A convex strip is fixedly arranged on the inner circumference of the cutting wheel, and the convex strip is slidably matched in the slide groove.

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