Turning device for slender valve rod

Abstract

The invention discloses a turning device for a long and thin valve rod, and relates to the field of valve rod machining, the turning device comprises a machine body, a three-jaw chuck, a tip and a turning tool rest are arranged on the machine body, a sliding seat is arranged on the machine body in a sliding mode, the turning tool rest is located on the sliding seat, and the turning tool rest is located on the upper side of the valve rod; bearing wheels are symmetrically arranged on the side, located at the center, of the machine body, the two bearing wheels bear a valve rod, a mounting plate is arranged on the machine body in a lifting mode, a leveling wheel is rotationally connected to the mounting plate, sliding plates are arranged on the two sides, located on the mounting plate, of the machine body in a sliding mode, and bearing rods are arranged on the two sliding plates in a lifting mode; and a universal supporting ball is mounted at the upper end of the supporting rod. The machining quality of the long and thin valve rod can be improved.

Description

Technical Field

[0001] The present application relates to the field of valve stem processing, and in particular to a turning device for a slender valve stem. Background Art

[0002] The valve stem plays a vital role as the opening and closing actuator of valve components.

[0003] At present, the turning processing of the valve stem is carried out on a lathe. A three-jaw chuck is used to fix one end of the valve stem, and the other end is abutted by a top. The three-jaw chuck drives the valve stem to rotate, and the turning tool abuts against the valve stem. The turning tool moves along the length direction of the valve stem to realize the turning of the valve stem.

[0004] However, for some slender valve stems, when turning operations are performed on a lathe, due to their slender characteristics, the support point of the lathe on the valve stem is far away. One reason is the gravity of the valve stem itself, and the other is the force exerted by the turning tool on the valve stem, which will eventually cause the valve stem to bend and affect the processing quality of the valve stem. Summary of the invention

[0005] In order to improve the processing quality of the valve stem, the present application provides a turning device for a slender valve stem.

[0006] The present application provides a turning device for a slender valve stem adopts the following technical solution: A turning device for a slender valve stem comprises a machine body, on which a three-jaw chuck, a center and a turning tool holder are provided, a slide seat is slidably provided on the machine body, the turning tool holder is located on the slide seat, the turning tool holder is located on the upper side of the valve stem, supporting wheels are symmetrically provided on one side of the machine body located at the center, two supporting wheels support the valve stem, a mounting plate is lifted and lowered on the machine body, a leveling wheel is rotatably connected to the mounting plate, sliding plates are slidably provided on both sides of the machine body located at the mounting plate, supporting rods are lifted and lowered on the two sliding plates, and a universal supporting ball is installed on the upper end of the supporting rod.

[0007] By adopting the above technical solution, the staff fixes one end of the valve stem to the three-jaw chuck and overlaps the other end on the supporting wheel. Then, the leveling wheel rises and is located in the middle position of the valve stem. If the valve stem bends due to gravity, its bending point is also located in the middle position. The leveling wheel rises and drives the valve stem to move, so that the valve stem remains horizontal. Then, the top end touches the other end of the valve stem, and the universal support ball rises and touches the valve stem. Then, the three-jaw chuck rotates, driving the valve stem to rotate, and the slide seat drives the tool on the tool holder to move, so that the valve stem can be turned. In practice, the tool moves from the top end side toward the three-jaw chuck, and the universal support ball located on the side close to the top end is located below the tool and supports the valve stem. When the turning tool moves, the sliding plate synchronously drives the corresponding universal support ball to move, and the universal support ball supports the turning position of the turning tool to prevent the valve stem from radial movement during the processing; when the turning tool moves to the middle position, the sliding plate on one side stops sliding, and when the turning tool passes the middle position to the other side, the corresponding sliding plate drives the corresponding universal support ball to move, which can ensure the support of the turning point during the turning process. When the turning tool moves to the middle position of the valve stem, the leveling wheel will support the valve stem, that is, during the movement of the turning tool, the valve stem is supported by two universal support balls and the leveling wheel, which helps to prevent the valve stem from bending, thereby helping to improve the turning quality.

[0008] Preferably, a first screw rod is connected to the machine body in a horizontal rotation direction, the slide seat is threadedly connected to the first screw rod, a driving motor is provided on the machine body to drive the first screw rod to rotate, a linkage rod is fixedly installed on the slide seat, the linkage rod is vertically arranged, a linkage groove is provided on the sliding plate, the linkage rod extends into the linkage groove, and the linkage groove is opened on one side, the openings of the linkage grooves of the two sliding plates are arranged opposite to each other, a baffle is hinged in the linkage groove, and one side of the baffle is integrally formed with Rotating tooth, a locking tooth is set on the sliding plate for lifting and lowering. In the initial state, the locking tooth is engaged with the rotating tooth, a plug-in rod is set on the machine body, and a rack portion is formed at one end of the plug-in rod. A plug-in groove for plugging and cooperating with the plug-in rod is opened on the sliding plate, and the rotating tooth extends into the plug-in groove; when the sliding plate slides and plugs with the plug-in rod, the locking tooth rises to release the lock on the rotating tooth, and then the rack portion of the plug-in rod is engaged with the rotating tooth, and drives the baffle to rotate, and then the linkage rod is disengaged from the linkage groove.

[0009] By adopting the above technical scheme, the driving motor drives the first screw rod to rotate, and the first screw rod drives the sliding seat to slide in the horizontal direction; in the initial state, the sliding seat is located on the side close to the top, and the linkage rod extends into the linkage groove of the sliding plate on the side close to the top, and at this time the baffle plate blocks the linkage groove, and the baffle plate cooperates with the bottom wall of the linkage groove to limit the linkage rod. At this time, when the sliding seat slides, the sliding plate can be driven to slide synchronously through the linkage rod to ensure that the supporting point of the universal support ball on the valve stem is always located below the turning tool, thereby helping to prevent the valve stem from moving; when the sliding plate slides, the plug-in rod will enter the plug-in groove, and at this time the locking tooth rises and disengages from the rotating tooth, releasing the lock of the rotating tooth, that is, the locking tooth can rotate at this time, and under the action of the rack part of the plug-in rod, the rotating tooth is driven to rotate, the baffle plate gradually rotates, and the limitation of the linkage rod is released, and the linkage rod can slide out of the linkage groove and disengage from the sliding plate. The cam is in a state of being moved in a rotational direction and the ...

[0010] Preferably, the sliding plate is provided with a lifting groove in the vertical direction, the lower end of the lifting groove is connected with the plug-in groove, the sliding plate is located in the lifting groove and is provided with a first wedge block for lifting and sliding, the locking tooth is located below the first wedge block, a penetration groove is provided on the first wedge block, and the first wedge block is formed with a first wedge surface on the inner wall of the penetration groove, the machine body is provided with a second wedge block, and the second wedge block is provided with two corresponding to the two sliding plates, the sliding plate is provided with a sliding groove in the horizontal direction, the sliding groove is connected with the lifting groove, the second wedge block is plugged into and slidably matched with the sliding groove, and the second wedge block is close to the sliding groove A second wedge surface is formed on one side of the moving plate; when the sliding plate slides toward the side close to the second wedge block, the second wedge block is plugged into the sliding groove, and the second wedge block enters the through groove of the first wedge block, and under the cooperation of the first wedge surface and the second wedge surface, the first wedge block rises, and the locking tooth and the rotating tooth are disengaged; an abutment ring plate is provided on the circumferential side of the first wedge block, and an abutment groove is formed on the sliding plate located in the lifting groove, and the abutment ring plate is located in the abutment groove, and a return spring is provided on the sliding plate located in the abutment groove, one end of the return spring is connected to the abutment ring plate, and the other end of the return spring is connected to the inner wall of the abutment groove.

[0011] By adopting the above technical solution, when the sliding seat slides toward the middle of the valve stem, that is, when the sliding seat drives the corresponding sliding plate to slide toward the middle position of the valve stem through the linkage rod, the sliding plate will be plugged into the corresponding second wedge block, and the second wedge block will be plugged and slidably matched with the sliding groove, and the second wedge block will pass through the penetration groove of the first wedge block, and then under the cooperation of the first wedge surface and the second wedge surface, the first wedge block will rise, that is, the locking tooth and the rotating tooth will be disengaged; and then the rack part of the plug-in block will cooperate with the rotating tooth to drive it to rotate; when the sliding seat drives the sliding plate to slide in the opposite direction, the rack part drives the rotating tooth to rotate, so that the baffle is reset, and then the second wedge block is disengaged from the first wedge block, and under the action of the reset spring, the first wedge block descends and resets, and the locking tooth locks the rotating tooth.

[0012] Preferably, the mounting plate is also rotatably connected to two leveling wheels, the highest points of the leveling wheels and the highest points of the leveling wheels are on the same horizontal line, the two leveling wheels are located on both sides of the leveling wheel, a first sliding groove is radially provided in the leveling wheel, a leveling block is slidably provided in the first sliding groove of the leveling wheel, a first annular groove is also provided in the first sliding groove of the leveling wheel, a first abutment plate is provided on the circumference of the leveling block, the first abutment plate is located in the first annular groove, and a first compression spring is provided in the first annular groove of the leveling wheel, One end of the first compression spring is connected to the inner wall of the first annular groove, and the other end of the first compression spring is connected to the first abutment plate; a contact switch is installed on the bottom wall of the leveling wheel located in the first slide groove, and an indicator light is installed on the side of the leveling wheel, and the indicator light is electrically connected to the contact switch. When the leveling block slides and contacts the contact switch, the contact switch controls the indicator light to light up; a locking component for locking the position of the leveling block is arranged in the leveling block; a counterweight part is formed on the leveling wheel, and under the action of the counterweight part, the leveling block is arranged vertically.

[0013] By adopting the above technical scheme, in the initial state, under the action of the counterweight part, the leveling block is in a vertical state and is in a state of extending out from the surface of the leveling wheel. When the leveling operation is performed, the mounting plate rises and the leveling wheel will contact the middle position of the valve stem. If the valve stem is bent due to gravity, the leveling wheel will rise to level the valve stem. Since the leveling block is in an ascending state, the leveling block will also contact the valve stem. During the rising process of the mounting plate, the leveling block will gradually drop under the pressure of the valve stem. When the leveling block completely enters the first slide groove, the locking assembly will lock the leveling block. This indicates that the valve stem is overlapped on two leveling wheels and one leveling wheel, which means that the valve stem is in a horizontal state and is not bent at this time. At the same time, when the leveling block completely enters the first slide groove, the leveling block contacts the contact switch, and the contact switch control indicator light is on, prompting the staff that the leveling work of the valve stem is completed, and then the subsequent turning operation can be performed.

[0014] Preferably, the locking assembly includes a third wedge block, a second sliding groove is opened in the leveling wheel in the horizontal direction, the third wedge block is slidably arranged in the second sliding groove, the second sliding groove is communicated with the first sliding groove, a third wedge surface is formed at the end of the third wedge block, a locking groove is opened on the leveling block, and the third wedge block is plugged into the locking groove to achieve locking of the leveling block; a second annular groove is formed on the peripheral side of the leveling wheel located in the second sliding groove, and a second abutment plate is integrally formed on the peripheral side of the third wedge block, and a second compression spring is provided in the second annular groove of the leveling wheel, one end of the second compression spring is connected to the inner wall of the second annular groove, and the other end of the second compression spring is connected to the second abutment plate.

[0015] By adopting the above technical solution, the third wedge block extends into the first slide groove under the action of the second compression spring. When the leveling block gradually slides under the action of the valve stem and slides into the first slide groove, the leveling block drives the third wedge block to slide into the second slide groove under the action of the third wedge surface. When the leveling block finishes sliding, the third wedge block is plugged into the locking groove under the action of the second compression spring to lock the leveling block. Because the valve stem will rotate during the turning process, the leveling wheel will rotate accordingly. By locking the leveling block, the leveling block can be prevented from extending out of the first slide groove.

[0016] Preferably, a second screw rod is rotatably arranged on the machine body along a vertical direction, and the mounting plate is threadedly connected to the second screw rod.

[0017] By adopting the above technical solution, the second screw is rotated to realize the lifting movement of the mounting plate.

[0018] Preferably, a fixing plate is fixedly connected to the machine body, and the fixing plate is located at the lower side of the mounting plate, and the locking assembly also includes a fourth wedge block, and the fourth wedge block is fixedly mounted on the fixing plate in a vertical direction, and a third sliding groove is radially provided on the leveling wheel, and the third sliding groove is connected with the second sliding groove, and an unlocking groove is provided in the middle of the third wedge block, and a fourth wedge surface is provided on the inner wall of the third wedge block located at the unlocking groove, and a fifth wedge surface is formed on the upper end of the fourth wedge block; when turning is completed, the mounting plate descends, the fourth wedge block will enter the third sliding groove, and the fourth wedge block will be plugged into the unlocking groove, and under the action of the fourth wedge surface and the fifth wedge surface, the third wedge block slides to release the lock of the leveling block.

[0019] By adopting the above technical solution, in the initial state, the fourth wedge block is plugged into the unlocking groove, and the leveling block extends out of the first sliding groove. When the mounting plate rises, the leveling wheel disengages from the fourth wedge block, and then under the action of the valve stem on the leveling block, the leveling block descends and the third wedge block locks the leveling block.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. One end of the valve stem is fixed to the three-jaw chuck, and the other end is first overlapped on the supporting wheel, then the leveling wheel rises to support the middle position of the valve stem and make the valve stem horizontal, then the top abuts against the other end of the valve stem, then the universal support ball rises and abuts against the valve stem, then the slide seat drives the tool holder to slide along the length direction of the valve stem, and the universal support ball slides accordingly. The support point of the universal support ball and the turning point of the tool are located at the same place, which can prevent radial movement during the turning process, thereby preventing the valve stem from bending; 2. When the slide seat slides, the linkage rod synchronously drives the sliding plate to slide, that is, the synchronous sliding of the universal support ball is realized. Due to the existence of the mounting plate at the middle position of the valve stem, the sliding plate cannot pass over the middle of the valve stem. Therefore, when the turning tool gradually moves to the middle of the valve stem, the second wedge block slides and cooperates with the sliding groove, and drives the first wedge block to rise, so that the locking tooth and the rotating tooth are disengaged, and at the same time, the plug-in rod enters the plug-in groove, drives the rotating tooth to rotate, and the baffle plate rotates. At this time, the linkage rod is disengaged from the linkage groove, that is, it will not drive the sliding plate to slide at this time. When the slide seat passes the middle position of the valve stem, the linkage rod enters the linkage groove of the other sliding plate, and drives it to slide synchronously, and the universal support ball continues to work; 3. The mounting plate rises, and the leveling block on the leveling wheel will first contact the valve stem, and then the mounting plate continues to rise. When the leveling block drops into the first slide slot and contacts the contact switch, the contact switch control indicator light turns on, indicating that the valve stem is in a horizontal state. When the valve stem is bent, its middle position is in a "V" shape. If the valve stem and the upper sides of the leveling wheel and the two leveling wheels are in contact, it means that the valve stem is in a horizontal state. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 A top view of the sliding plate in the embodiment of the present application; Figure 3 This is a front view cross-sectional view of the sliding plate in the embodiment of the present application; Figure 4 It is a partial structural schematic diagram of an embodiment of the present application, mainly showing the structure of the baffle and the first wedge-shaped block; Figure 5 This is a partial structural diagram of an embodiment of the present application, which mainly reflects the structure of the baffle and the plug-in rod; Figure 6 This is a partial structural diagram of an embodiment of the present application, which mainly reflects the structure of the leveling wheel; Figure 7 It is a cross-sectional view of the leveling wheel in the embodiment of the present application, and it is a state where the leveling block enters the first slide groove; Figure 8 It is a partial structural diagram of an embodiment of the present application, which mainly reflects the structure of the third wedge block and the fourth wedge block.

[0022] Figure numerals: 1, machine body; 11, three-jaw chuck; 12, top; 13, tool holder; 14, supporting wheel; 15, first screw rod; 16, driving motor; 17, second screw rod; 171, fixing plate; 18, guide rod; 2, slide seat; 21, linkage rod; 3, mounting plate; 31, leveling wheel; 4, sliding plate; 41, linkage groove; 42, baffle; 421, rotating tooth; 43, lifting groove; 431, abutment groove; 432, reset spring; 44, first wedge block; 441, locking tooth; 442, penetration groove; 443, first wedge surface; 444, abutment ring plate; 45, plug-in groove; 46, sliding groove; 5, supporting rod; 51, universal supporting ball ; 6. plug-in rod; 61. rack portion; 7. second wedge block; 71. second wedge surface; 8. leveling wheel; 81. first slide groove; 811. contact switch; 82. first ring groove; 821. first compression spring; 83. indicator light; 84. counterweight portion; 85. second slide groove; 86. second ring groove; 861. second compression spring; 87. third slide groove; 9. leveling block; 91. first abutment plate; 92. locking groove; 10. locking assembly; 101. third wedge block; 1011. third wedge surface; 1012. second abutment plate; 1013. unlocking groove; 1014. fourth wedge surface; 102. fourth wedge block; 1021. fifth wedge surface. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-Figure 8 This application is described in further detail.

[0024] The embodiment of the present application discloses a turning device for a slender valve stem.

[0025] Reference Figure 1 The turning device of the slender valve stem includes a body 1, on which a three-jaw chuck 11, a top 12 and a turning tool holder 13 are installed. Since the three-jaw chuck 11, the top 12 and the turning tool holder 13 are conventional parts of a lathe, they are not described in detail. A slide seat 2 is slidably connected to the body 1, and the turning tool holder 13 is installed on the slide seat 2. The slide seat 2 and the turning tool holder 13 are located above the valve stem. The body 1 is symmetrically mounted with supporting wheels 14 on one side of the top 12. The two supporting wheels 14 are used In order to pre-support the valve stem, a mounting plate 3 is provided on the body 1 for lifting and lowering, and a leveling wheel 31 is rotatably connected to the mounting plate 3; sliding plates 4 are slidably provided on both sides of the body 1 located on the mounting plate 3, and the sliding plates 4 slide on the body 1 through slide rails, and the sliding direction of the sliding plates 4 is parallel to the length direction of the valve stem, and supporting rods 5 are provided on the two sliding plates 4 for lifting and lowering, and the lifting and lowering of the supporting rods 5 are driven by a cylinder (not shown in the figure), and a universal supporting ball 51 is installed on the upper end of the supporting rod 5.

[0026] In practice, one end of the valve stem is first fixed to the three-jaw chuck 11, and the other end is overlapped on the supporting wheel 14, and then the mounting plate 3 drives the leveling wheel 31 to rise, and the leveling wheel 31 is located on the lower side of the middle position of the valve stem. After the leveling wheel 31 abuts against the valve stem, the valve stem can be driven to move upward, so that the valve stem is in a horizontal state, and then the top 12 moves to abut against the end of the valve stem away from the three-jaw chuck 11; the three-jaw chuck 11 rotates, driving the valve stem to rotate, and the slide seat 2 drives the turning tool holder 13 to slide along the length direction of the valve stem, and the turning tool can turn the valve stem. In the process, the sliding plate 4 will drive the universal support ball 51 to move, and the universal support ball 51 supports the turning position of the turning tool to prevent the valve stem from moving during the turning process; when the turning tool moves to the middle position of the valve stem, the sliding plate 4 on one side stops sliding, and when the turning tool passes the middle position of the valve stem, the sliding plate 4 on the other side will drive the universal support ball 51 to move synchronously with the slide seat 2. Through the two universal support balls 51, the turning point can be supported to reduce radial movement, which helps to prevent the valve stem from bending, that is, it helps to improve the turning quality.

[0027] Reference Figure 1 , Figure 2 and Figure 3 A first screw rod 15 is connected to the machine body 1 and rotates horizontally. A driving motor 16 for driving the first screw rod 15 to rotate is also installed on the machine body 1. The slide seat 2 is threadedly connected to the first screw rod 15. A linkage rod 21 is fixedly installed on the slide seat 2, and the linkage rod 21 is vertically arranged; the two sliding plates 4 have the same structure and are symmetrically arranged. Now, one of the sliding plates 4 is taken as an example for explanation. A linkage groove 41 is opened on the sliding plate 4, and the opening of the linkage groove 41 faces the mounting plate 3. The linkage groove 41 is horizontally arranged, and a baffle 42 is hinged in the linkage groove 41. The baffle 42 is integrally formed with a rotating tooth 421 at the hinge point.

[0028] Reference Figure 3 and Figure 4 A lifting groove 43 is provided in the vertical direction of the sliding plate 4. The sliding plate 4 is provided with a first wedge block 44 in the lifting groove 43 for lifting and sliding. A locking tooth 441 is integrally formed at the lower end of the first wedge block 44. The locking tooth 441 is engaged with the rotating tooth 421 to lock the baffle plate 42. In the initial state, the linkage rod 21 is limited under the cooperation of the baffle plate 42 and the inner wall of the linkage groove 41, and the linkage rod 21 can synchronously drive the sliding plate 4 to slide.

[0029] Reference Figure 2 , Figure 3 and Figure 4A plug-in rod 6 and a second wedge block 7 are horizontally fixedly arranged on the upper edge of the body 1, wherein the length of the second wedge block 7 is greater than the length of the plug-in rod 6, and a plug-in groove 45 and a sliding groove 46 are horizontally opened on the sliding plate 4, the plug-in rod 6 is plugged into the plug-in groove 45, and the second wedge block 7 is plugged into the sliding groove 46; the rotating tooth 421 is located in the plug-in groove 45, and the sliding groove 46 is connected to the lifting groove 43. The first wedge block 44 is provided with a penetration groove 442, and the first wedge block 44 is formed with a first wedge surface 443 on the inner wall of the penetration groove 442, and the second wedge block 7 is formed with a second wedge surface 71 at one end close to the sliding plate 4. When the sliding plate 4 slides toward the middle of the valve stem, the second wedge block 7 is inserted into and slides with the sliding groove 46 and passes through the penetration groove 442. With the cooperation of the first wedge surface 443 and the second wedge surface 71, the first wedge block 44 is driven to rise, so that the locking tooth 441 and the rotating tooth 421 are disengaged, thereby releasing the lock on the baffle 42.

[0030] Reference Figure 3 and Figure 5 A rack portion 61 is formed at the end of the plug-in rod 6. When the sliding plate 4 slides, the plug-in rod 6 and the plug-in groove 45 are plugged and slid. When the locking tooth 441 is disengaged from the rotating tooth 421, the rack portion 61 engages with the rotating tooth 421 and drives the rotating tooth 421 to rotate, that is, drives the baffle 42 to rotate, releases the limit on the linkage rod 21, and the linkage rod 21 will slide out of the linkage groove 41 without driving the sliding plate 4 to slide.

[0031] An abutment ring plate 444 is integrally formed on the circumferential side of the first wedge block 44, and an abutment groove 431 is formed in the sliding plate 4 located in the lifting groove 43. The abutment ring plate 444 is located in the abutment groove 431, and a return spring 432 is provided in the abutment groove 431 of the sliding plate 4. One end of the return spring 432 is connected to the abutment ring plate 444, and the other end is connected to the inner wall of the abutment groove 431.

[0032] During the turning operation, the slide 2 is initially located at the side close to the top 12, and the slide 2 drives the turning tool on the turning tool holder 13 to turn the valve stem. At this time, the linkage rod 21 on the slide 2 is located in the linkage groove 41 of the sliding plate 4 on this side, and because the baffle 42 limits the linkage rod 21, when the slide 2 slides, the slide 2 will synchronously drive the sliding plate 4 to slide, that is, the universal support ball 51 always supports the turning point to prevent the valve stem from moving; There are mounting plates 3 and leveling wheels 31 at the lower part of the valve stem, so the sliding plate 4 on this side cannot pass the middle part of the valve stem. When the sliding seat 2 drives the sliding plate 4 to move toward the middle part of the valve stem, the plug-in rod 6 is plugged and slidably matched with the plug-in groove 45, and the second wedge block 7 is plugged and slidably matched with the sliding groove 46. The second wedge block 7 will first pass through the penetration groove 442 of the first wedge block 44. Under the cooperation of the first wedge surface 443 and the second wedge surface 71, the first wedge block 44 is The locking tooth 441 and the rotating tooth 421 are disengaged, and the baffle 42 is unlocked. At this time, the rack portion 61 of the plug-in rod 6 is just engaged with the rotating tooth 421. Then, when the slide 2 moves, the linkage rod 21 drives the baffle 42 to rotate until the linkage rod 21 is disengaged from the baffle 42, and then the linkage rod 21 is disengaged from the linkage groove 41, and then the sliding plate 4 on this side stops moving; then the slide 2 continues to move, and at the middle position of the valve stem, the leveling wheel 3 1 can continue to play a supporting role. When the sliding seat 2 passes the middle position of the valve stem, the linkage rod 21 enters the linkage groove 41 of the sliding plate 4 on the other side. The sliding plate 4 on this side is initially plugged with the plug rod 6 and the second wedge block 7. After the linkage rod 21 abuts against the inner wall of the linkage groove 41, it drives the sliding plate 4 to slide synchronously. When the sliding plate 4 is separated from the plug rod 6 and the second wedge block 7, the baffle 42 rotates, and the locking tooth 441 locks the rotating tooth 421. When the turning operation is completed, the slide seat 2 slides and resets, driving the sliding plate 4 to slide toward the middle of the valve stem until it is plugged into the plug rod 6 and the second wedge block 7. The baffle 42 rotates, and the linkage rod 21 disengages from the sliding plate 4. When the sliding plate 4 passes the middle of the valve stem, the linkage rod 21 drives the sliding plate 4 on the side close to the top 12 to slide and reset synchronously. The sliding plate 4 on this side is disengaged from the plug rod 6 and the second wedge block 7, and the baffle 42 is reset, which limits the linkage rod 21.

[0033] Reference Figure 1 The machine body 1 is connected with a second screw rod 17 for rotation in the vertical direction, the mounting plate 3 is threadedly connected with the second screw rod 17, and a guide rod 18 is installed in the vertical direction on the machine body 1, and the mounting plate 3 is plugged and slidably matched with the guide rod 18. The second screw rod 17 is a hand wheel driving the worm gear to rotate, driving the rotation of the second screw rod 17.

[0034] Reference Figure 1 , Figure 6 and Figure 7Two leveling wheels 8 are also rotatably connected to the mounting plate 3. The two leveling wheels 8 are located on both sides of the leveling wheel 31. The highest points of the leveling wheels 8 and the highest points of the leveling wheels 31 are on the same horizontal line. A first slide groove 81 is radially provided in the leveling wheel 8, and the leveling wheel 8 is slidably connected with the leveling block 9 in the first slide groove 81. A first annular groove 82 is also provided in the first slide groove 81 of the leveling wheel 8, and a first abutting plate 91 is integrally formed on the circumference of the leveling block 9, and the first abutting plate 91 is located in the first annular groove 82. A first compression spring 821 is provided in the first annular groove 82 of the leveling wheel 8, and one end of the first compression spring 821 is connected to the inner wall of the first annular groove 82, and the other end is connected to the first abutting plate 91; a contact switch 811 is installed on the bottom wall of the first slide groove 81 of the leveling wheel 8, and an indicator light 83 is installed on the side of the leveling wheel 8, and the contact switch 811 is electrically connected to the indicator light 83; when the leveling block 9 slides in the first slide groove 81 and contacts with the contact switch 811, the contact switch 811 controls the indicator light 83 to light up. The leveling block 9 is provided with a counterweight 84. In the initial state, under the action of the counterweight 84, the first slide slot 81 is opened upward, and the leveling block 9 extends upward out of the first slide slot 81. A locking assembly 10 is provided inside the leveling block 9 to lock the position of the leveling block 9.

[0035] In the initial state, the leveling block 9 extends out of the first slide slot 81. When the mounting plate 3 rises, the leveling block 9 will contact the valve stem. If the valve stem is bent due to gravity, the leveling wheel 31 rises to level the valve stem. During the process, the valve stem acts on the leveling block 9, causing the leveling block 9 to slide into the first slide slot 81. When the leveling block 9 completely enters the first slide slot 81, the leveling block 9 contacts the contact switch 811 and controls the indicator light 83 to light up, prompting the staff that the leveling action has been completed, and the locking assembly 10 will lock the position of the leveling block 9. When the valve stem is bent, the middle part of the valve stem will be in a "V" shape. When the leveling block 9 completely slides into the first slide slot 81, it means that the middle part of the valve stem is in contact with the two leveling wheels 8 and the leveling wheel 31, that is, the middle part of the valve stem is in a horizontal state.

[0036] Reference Figure 7 and Figure 8The locking assembly 10 includes a third wedge block 101, a second slide groove 85 is provided in the horizontal direction in the leveling wheel 8, the third wedge block 101 is slidably connected in the second slide groove 85, the second slide groove 85 is communicated with the first slide groove 81, a third wedge surface 1011 is formed at the end of the third wedge block 101, a locking groove 92 is provided on the leveling block 9, a second annular groove 86 is formed on the peripheral side of the leveling wheel 8 located at the second slide groove 85, a second abutment plate 1012 is integrally formed on the peripheral side of the third wedge block 101, and a second compression spring 861 is provided in the second annular groove 86 of the leveling wheel 8, one end of the second compression spring 861 is connected to the inner wall of the second annular groove 86, and the other end is connected to the second abutment plate 1012. When the third wedge block 101 is plugged into the locking groove 92, the leveling block 9 is locked.

[0037] Reference Figure 1 , Figure 6 , Figure 7 and Figure 8 The body 1 is fixedly connected with a fixing plate 171, which is located at the lower side of the mounting plate 3. The second screw rod 17 passes through the fixing plate 171, wherein the plug rod 6 and the second wedge block 7 are both fixed on the fixing plate 171. The locking assembly 10 also includes a fourth wedge block 102, which is mounted on the fixing plate 171 in the vertical direction. The leveling wheel 8 is provided with a third slide groove 87 in the radial direction, and the length direction of the third slide groove 87 is parallel to the length direction of the first slide groove 81. In the initial state, the third slide groove 87 is vertically downward, and the third slide groove 87 is connected with the second slide groove 85. An unlocking groove 1013 is provided in the middle of the third wedge block 101, and a fourth wedge surface 1014 is formed on the inner wall of the third wedge block 101 located at the unlocking groove 1013, and a fifth wedge surface 1021 is formed on the upper end of the fourth wedge block 102. When the turning operation is completed, the mounting plate 3 descends, the leveling wheel 8 is separated from the valve stem, and under the action of the counterweight 84, the third slide groove 87 is set vertically downward, the fourth wedge block 102 is plugged into the third slide groove 87, and the fourth wedge block 102 passes through the unlocking groove 1013, and with the cooperation of the fourth wedge surface 1014 and the fifth wedge surface 1021, the third wedge block 101 is driven to slide in the direction away from the first slide groove 81, the third wedge block 101 is separated from the leveling block 9, and under the action of the first compression spring 821, the leveling block 9 extends out of the first slide groove 81.

[0038] In the initial state, the fourth wedge block 102 is plugged into the unlocking groove 1013. At this time, the leveling block 9 extends out of the first slide groove 81. When the mounting plate 3 rises, the leveling wheel 8 is disengaged from the fourth wedge block 102, and the fourth wedge block 102 releases the lock on the third wedge block 101. Afterwards, under the action of the valve stem on the leveling block 9, the leveling block 9 descends. Under the action of the third wedge surface 1011, the third wedge block 101 will slide away from the first slide groove 81, and then the leveling block 9 completely enters the first slide groove 81. After that, the third wedge block 101 is plugged into the locking groove 92 to lock the leveling block 9.

[0039] The implementation principle of a turning device for a slender valve stem in an embodiment of the present application is as follows: when turning the slender valve stem, first fix one end of the valve stem to the three-jaw chuck 11, and overlap the other end on the supporting wheel 14, and then the mounting plate 3 rises, and the leveling wheel 31 and the leveling wheel 8 rise synchronously. Under the action of the valve stem, the leveling block 9 will descend, and when the leveling block 9 completely enters the first slide groove 81, the valve stem is overlapped on the leveling wheel 31 and the leveling wheel 8, and the valve stem is in a horizontal state; then the top 12 moves to abut against the end of the valve stem, the three-jaw chuck 11 drives the valve stem to rotate, and the slide seat 2 drives the tool holder 13 to move, and the tool can turn the valve stem. During the movement of the tool, the universal support ball 51 will also move synchronously to support the turning point, thereby preventing the valve stem from moving during turning. Through the above method, on the one hand, the problem of valve stem bending due to gravity is solved, and on the other hand, the movement of the valve stem during turning is reduced, which helps to prevent the valve stem from bending, that is, helps to improve the processing quality of the valve stem.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A turning device for a slender valve stem, characterized in that: The invention comprises a machine body (1), wherein the machine body (1) is provided with a three-jaw chuck (11), a center (12) and a tool holder (13), wherein a slide seat (2) is slidably provided on the machine body (1), wherein the tool holder (13) is located on the slide seat (2), wherein the tool holder (13) is located on the upper side of a valve stem, wherein a supporting wheel (14) is symmetrically provided on one side of the machine body (1) located at the center (12), wherein the two supporting wheels (14) support the valve stem, wherein a mounting plate (3) is lifted and lowered on the machine body (1), wherein a leveling wheel (31) is rotatably connected to the mounting plate (3), wherein sliding plates (4) are slidably provided on both sides of the mounting plate (3) of the machine body (1), wherein supporting rods (5) are lifted and lowered on the two sliding plates (4), wherein a universal supporting ball (51) is installed at the upper end of the supporting rod (5).

2. A turning device for a slender valve stem according to claim 1, characterized in that: The machine body (1) is connected with a first screw rod (15) for rotation in a horizontal direction. The slide seat (2) is threadedly connected to the first screw rod (15). The machine body (1) is provided with a driving motor (16) for driving the first screw rod (15) to rotate. The slide seat (2) is fixedly installed with a linkage rod (21). The linkage rod (21) is vertically arranged. The sliding plate (4) is provided with a linkage groove (41). The linkage rod (21) extends into the linkage groove (41). The linkage groove (41) is opened on one side. The openings of the linkage grooves (41) of the two sliding plates (4) are arranged opposite to each other. A baffle plate (42) is hinged in the linkage groove (41). A rotating tooth (421) is integrally formed on one side of the baffle plate (42). A locking tooth (441) is provided on the shift plate (4) for lifting and lowering. In an initial state, the locking tooth (441) meshes with the rotating tooth (421). A plug-in rod (6) is provided on the machine body (1). A rack portion (61) is formed at one end of the plug-in rod (6). A plug-in groove (45) for plugging with the plug-in rod (6) is provided on the sliding plate (4). The rotating tooth (421) extends into the plug-in groove (45). When the sliding plate (4) slides and plugs with the plug-in rod (6), the locking tooth (441) rises to release the lock on the rotating tooth (421). Subsequently, the rack portion (61) of the plug-in rod (6) meshes with the rotating tooth (421) and drives the baffle (42) to rotate, and then the linkage rod (21) is disengaged from the linkage groove (41).

3. A turning device for a slender valve stem according to claim 2, characterized in that: The sliding plate (4) is provided with a lifting groove (43) in the vertical direction, the lower end of the lifting groove (43) is connected with the plug-in groove (45), the sliding plate (4) is located in the lifting groove (43) and has a first wedge block (44) for lifting and sliding, the locking tooth (441) is located below the first wedge block (44), the first wedge block (44) is provided with a penetration groove (442), and the first wedge block (44) is located on the inner wall of the penetration groove (442) to form a locking tooth (441) on the sliding plate (44). The machine body (1) is provided with a first wedge-shaped surface (443), a second wedge-shaped block (7) is provided on the machine body (1), two second wedge-shaped blocks (7) are provided corresponding to the two sliding plates (4), the sliding plates (4) are provided with sliding grooves (46) in the horizontal direction, the sliding grooves (46) are connected with the lifting grooves (43), the second wedge-shaped block (7) is plugged into and slidably matched with the sliding grooves (46), and a second wedge-shaped block (7) is formed on a side close to the sliding plate (4). When the sliding plate (4) slides toward the side close to the second wedge block (7), the second wedge block (7) is plugged into the sliding groove (46), and the second wedge block (7) enters the penetration groove (442) of the first wedge block (44). Under the cooperation of the first wedge surface (443) and the second wedge surface (71), the first wedge block (44) rises, and the locking teeth (441) and the rotating teeth (421) are disengaged; the peripheral side of the first wedge block (44) An abutment ring plate (444) is provided, the sliding plate (4) is located in the lifting groove (43) to form an abutment groove (431), the abutment ring plate (444) is located in the abutment groove (431), the sliding plate (4) is located in the abutment groove (431) and a return spring (432) is provided in the abutment groove (431), one end of the return spring (432) is connected to the abutment ring plate (444), and the other end of the return spring (432) is connected to the inner wall of the abutment groove (431).

4. A turning device for a slender valve stem according to claim 1, characterized in that: The mounting plate (3) is also rotatably connected to two leveling wheels (8), the highest points of the leveling wheels (8) and the highest points of the leveling wheels (31) are on the same horizontal line, the two leveling wheels (8) are located on both sides of the leveling wheel (31), a first sliding groove (81) is radially provided in the leveling wheel (8), a leveling block (9) is slidably provided in the first sliding groove (81) of the leveling wheel (8), a first annular groove (82) is also provided in the first sliding groove (81) of the leveling wheel (8), a first abutting plate (91) is provided on the circumference of the leveling block (9), the first abutting plate (91) is located in the first annular groove (82), a first compression spring (821) is provided in the first annular groove (82) of the leveling wheel (8), the first compression spring One end of the first compression spring (821) is connected to the inner wall of the first annular groove (82), and the other end of the first compression spring (821) is connected to the first abutment plate (91); a contact switch (811) is installed on the bottom wall of the leveling wheel (8) located in the first sliding groove (81), and an indicator light (83) is installed on the side of the leveling wheel (8), and the indicator light (83) is electrically connected to the contact switch (811). When the leveling block (9) slides and contacts the contact switch (811), the contact switch (811) controls the indicator light (83) to light up; a locking assembly (10) for locking the position of the leveling block (9) is arranged inside the leveling block (9); a counterweight portion (84) is formed on the leveling wheel (8), and under the action of the counterweight portion (84), the leveling block (9) is arranged vertically.

5. A turning device for a slender valve stem according to claim 4, characterized in that: The locking assembly (10) comprises a third wedge block (101), a second slide groove (85) is provided in the horizontal direction in the leveling wheel (8), the third wedge block (101) is slidably arranged in the second slide groove (85), the second slide groove (85) is communicated with the first slide groove (81), a third wedge surface (1011) is formed at the end of the third wedge block (101), a locking groove (92) is provided on the leveling block (9), and the third wedge block (101) is plugged into the locking groove (92) to achieve The leveling block (9) is locked; the leveling wheel (8) is formed with a second annular groove (86) on the peripheral side of the second slide groove (85); the third wedge block (101) is integrally formed with a second abutment plate (1012) on the peripheral side; the leveling wheel (8) is provided with a second compression spring (861) in the second annular groove (86); one end of the second compression spring (861) is connected to the inner wall of the second annular groove (86); and the other end of the second compression spring (861) is connected to the second abutment plate (1012).

6. A turning device for a slender valve stem according to claim 5, characterized in that: A second screw rod (17) is rotatably arranged on the machine body (1) in a vertical direction, and the mounting plate (3) is threadedly connected to the second screw rod (17).

7. A turning device for a slender valve stem according to claim 6, characterized in that: The machine body (1) is fixedly connected with a fixing plate (171), and the fixing plate (171) is located at the lower side of the mounting plate (3). The locking assembly (10) further comprises a fourth wedge block (102), and the fourth wedge block (102) is fixedly mounted on the fixing plate (171) along the vertical direction. A third slide groove (87) is radially provided on the leveling wheel (8), and the third slide groove (87) is connected with the second slide groove (85). An unlocking groove (1013) is provided in the middle of the third wedge block (101), and the third wedge block A fourth wedge surface (1014) is formed on the inner wall of the unlocking groove (1013) of the fourth wedge block (102), and a fifth wedge surface (1021) is formed on the upper end of the fourth wedge block (102); when turning is completed, the mounting plate (3) descends, the fourth wedge block (102) enters the third sliding groove (87), and the fourth wedge block (102) is plugged into the unlocking groove (1013), and under the action of the fourth wedge surface (1014) and the fifth wedge surface (1021), the third wedge block (101) slides to release the lock on the leveling block (9).

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