A vacuum butterfly valve valve welding turntable

Abstract

The present invention belongs to the technical field of valve welding, in particular to a valve welding turntable for a vacuum butterfly valve; the present invention includes: a base, on which a fixed table is fixedly connected; a locking pipe and a tightening assembly, one end of the locking pipe is fixedly connected with a rotating shaft, and the rotating shaft is connected to the fixed table; a plurality of pressing strips are evenly movably connected to the surface of the locking pipe along its circumferential direction, and a push rod for driving the pressing strips to move is connected inside the locking pipe; when the tightening assembly moves towards the locking pipe, the tightening assembly automatically tightens and fixes the valve body, and the tightening assembly drives the push rod to move, driving the pressing strips to move outwards to fix the valve stem seat on the valve body; by moving the tightening assembly towards the locking pipe, the present invention can automatically drive the tightening assembly to tighten and fix the valve body, and drive the locking pipe to automatically lock and fix the valve stem seat, automatically fixing the valve stem seat on the valve body, achieving the purpose of fixing the valve stem seat and the valve body at the same time, and the operation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of valve welding, and in particular to a welding turntable for a vacuum butterfly valve. Background Art

[0002] A butterfly valve, also called a flap valve, is a simple-structured regulating valve that can be used for the on-off control of media in low-pressure pipelines. The closing member (valve flap or butterfly plate) of the butterfly valve is a disc that rotates around the valve shaft to achieve opening and closing; the butterfly valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media, and mainly functions as a cut-off and throttling on the pipeline.

[0003] During valve production, the valve stem seat needs to be welded to the valve body. Therefore, the valve stem seat needs to be clamped and fixed on the valve body to ensure the stability of the position of the valve stem seat. Then, the welding table drives the entire valve body and valve stem seat to rotate 360°, and the welding torch welds the circumference of the valve stem seat; however, the existing welding turntable has the following problems: the clamping mechanisms clamp and fix the valve body and the valve stem seat separately in sequence, and the position of the valve stem seat welded on the valve body is generally aligned by manual operation, which is troublesome to operate and results in inaccurate welding positions of the valve stem seat. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a welding turntable for a vacuum butterfly valve. Through the cooperation of a locking tube and a tightening component, the valve body and the valve stem seat are locked and fixed simultaneously, overcoming the deficiencies of the prior art, and aiming to solve the problems in the background art.

[0005] To achieve the above technical purpose, the specific technical solution of the present invention is as follows. A welding turntable for a vacuum butterfly valve proposed by the present invention includes: a base, on which a fixed table is fixedly connected; a locking tube and a tightening component. One end of the locking tube is fixedly connected with a rotating shaft, and the rotating shaft is connected to the fixed table; a plurality of pressing strips are evenly movably connected to the surface of the locking tube along its circumference, and a push rod for driving the movement of the pressing strips is connected inside the locking tube; when the tightening component moves towards the locking tube, the tightening component automatically tightens and fixes the valve body, and the tightening component drives the push rod to move, driving the pressing strips to move outwards to fix the valve stem seat on the valve body.

[0006] As a preferred technical solution of the present invention, an inclined rail is fixedly connected to the pressing strip, the inclined rail is arranged inside the locking tube, the thickness of the inclined rail gradually increases along the direction away from the tightening component, and a guiding block is fixedly connected to the push rod, and an inclined groove slidably matched with the inclined rail is arranged on the guiding block.

[0007] As a preferred technical solution of the present invention, the tightening assembly includes a fixed block, on which a pair of support rods are rotatably connected, and a guide rod that can be inserted into the locking tube is fixedly connected to the fixed block. A slider is slidably connected to the surface of the guide rod, and a connecting rod is rotatably connected between the slider and the support rod.

[0008] As a preferred technical solution of the present invention, a support block is fixedly connected to the fixed block, one end of the support rod is fixedly connected with a support column, and a cylindrical spring is connected between the slider and the fixed block, and the cylindrical spring is connected to the surface of the guide rod.

[0009] As a preferred technical solution of the present invention, a connecting seat is fixedly connected to one end of the locking tube, the connecting seat is fixedly connected with the rotating shaft, and a stopper is fixedly connected to one end of the push rod, and a return spring is fixedly connected between the stopper and the connecting seat.

[0010] As a preferred technical solution of the present invention, a pressure ring is connected to the periphery of the locking tube for pressing the valve stem seat; a limiting hole slidably matched with the pressing strip is provided on the pressure ring, a moving block is slidably connected in the limiting hole, and a baffle is fixedly connected to one end of the pressing strip, and a first elastic member is fixedly connected between the baffle and the moving block, and a guiding strip slidably connected with the baffle is fixedly connected to the moving block.

[0011] As a preferred technical solution of the present invention, a limiting strip is provided on the surface of the guide rod, a limiting groove matched with the limiting strip is provided on the locking tube, and a plurality of ratchet grooves are provided on the surface of the locking tube. A bracket is fixedly connected to the fixed block, and one end of the bracket is rotatably connected with a ratchet pawl matched with the ratchet groove, and a second elastic member is connected between the ratchet pawl and the bracket.

[0012] As a preferred technical solution of the present invention, a pair of retaining frames are fixedly connected to both ends of the pressing strip, and a C-shaped elastic sheet is fixedly connected to the retaining frame, and the elastic sheet contacts the inner wall of the locking tube.

[0013] As a preferred technical solution of the present invention, a three-jaw chuck for fixing the rotating shaft is installed on the fixing table, and a driving motor for driving the three-jaw chuck to rotate is installed on the fixing table.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. By providing a locking tube and a tightening assembly, when the tightening assembly moves towards the locking tube, it can automatically drive the tightening assembly to tighten and fix the valve body, and drive the locking tube to automatically lock and fix the valve stem seat, automatically fixing the valve stem seat on the valve body, and achieving the purpose of fixing the valve stem seat and the valve body at the same time, with convenient operation.

[0016] 2. In the present invention, a plurality of pressing strips are provided on the locking tube. When the push rod moves, it drives the pressing strips to move outward, tightly supporting and fixing the valve stem seat. At the same time, the pressing strips are in contact with the inner wall of the valve stem seat and the inner wall of the through hole, making the inner wall of the valve stem seat flush and aligned with the inner wall of the through hole, thereby automatically aligning the valve stem seat with the through hole and ensuring the precise welding position of the valve stem seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of a vacuum butterfly valve valve welding turntable proposed by the present invention.

[0018] Figure 2 FIG. is a schematic diagram of the locking tube and the supporting and tightening assembly proposed by the present invention.

[0019] Figure 3 FIG. is a schematic structural diagram of the supporting and tightening assembly proposed by the present invention.

[0020] Figure 4 FIG. is a schematic structural diagram of the locking tube proposed by the present invention.

[0021] Figure 5 FIG. is a schematic cross-sectional view of the locking tube proposed by the present invention.

[0022] Figure 6 FIG. is a schematic structural diagram of the pressing strip proposed by the present invention.

[0023] Figure 7 FIG. is a schematic structural diagram of the push rod proposed by the present invention.

[0024] Figure 8 FIG. is a schematic diagram of the valve body and the valve stem seat.

[0025] In the figure: 1, base; 101, fixed table; 2, three-jaw chuck; 3, drive motor; 4, valve body; 41, valve stem seat; 42, through hole; 5, locking tube; 51, pressing strip; 5101, baffle; 5102, retaining frame; 5103, elastic sheet; 5104, inclined rail; 52, pressing ring; 53, limiting hole; 54, moving block; 55, first elastic member; 56, return spring; 57, guiding strip; 58, connecting seat; 59, ratchet groove; 510, limiting groove; 511, push rod; 512, guiding block; 513, inclined groove; 514, retaining block; 6, supporting and tightening assembly; 61, fixed block; 62, supporting block; 63, supporting rod; 64, connecting rod; 65, supporting column; 66, guiding rod; 67, limiting strip; 68, cylindrical spring; 69, bracket; 610, ratchet pawl; 611, second elastic member; 612, sliding block; 7, rotating shaft. DETAILED DESCRIPTION OF THE INVENTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Example: Figures 1 - 8 As shown, this embodiment discloses a vacuum butterfly valve welding turntable, which is suitable for locking and fixing the valve stem seat 41 on the valve body 4, and aligning with the through hole 42 on the valve body 4, and driving the valve stem seat 41 and the valve body 4 to rotate simultaneously, so as to facilitate welding of the valve stem seat 41; this embodiment comprises: a base 1, on which a fixing platform 101 is fixedly connected; a locking tube 5 and a tightening assembly 6, one end of the locking tube 5 is fixedly connected to the rotating shaft 7, the locking tube 5 passes through the valve stem seat 41, and the locking tube 5 is used to lock and fix the valve stem seat 41; the tightening assembly 6 is arranged on the valve body 4, the tightening assembly 6 is used to tighten and fix the valve body, and the locking tube 5 and the tightening assembly 6 rotate at the same time, and the rotating shaft 7 is connected to the fixed platform 101; a three-jaw chuck 2 for fixing the rotating shaft 7 is installed on the fixed platform 101, and a driving motor 3 for driving the three-jaw chuck 2 to rotate is installed on the fixed platform 101; the three-jaw chuck 2 is driven to rotate by the driving motor 3, and the rotating shaft 7 is driven to rotate, thereby driving the locking tube 5 and the tightening assembly 6 to rotate at the same time, thereby driving the valve body 4 and the valve stem seat 41 to rotate at the same time, so as to facilitate the welding of the valve stem seat 41.

[0028] like Figure 3 As shown, the tightening assembly 6 includes a fixed block 61, a pair of struts 63 are rotatably connected to the fixed block 61, and a guide rod 66 that can be inserted into the locking tube 5 is fixedly connected to the fixed block 61, a slider 612 is slidably connected to the surface of the guide rod 66, and a connecting rod 64 is rotatably connected between the slider 612 and the strut 63; a strut block 62 is fixedly connected to the fixed block 61, a strut 65 is fixedly connected to one end of the strut 63, and a cylindrical spring 68 is connected between the slider 612 and the fixed block 61, and the cylindrical spring 68 is connected to the surface of the guide rod 66; the principle of the tightening assembly 6 is as follows: Figures 2 - 3 As shown, when in use, the tightening assembly 6 is placed inside the valve body 4, the support block 62 contacts the inner wall of the valve body 4, and the guide rod 66 is inserted into the locking tube 5. When the tightening assembly 6 and the valve body 4 are manually moved together toward the locking tube 5, one end of the locking tube 5 contacts the surface of the slider 612. As the tightening assembly 6 approaches, the locking tube 5 resists the slider 612 and slides on the surface of the guide rod 66, and the slider 612 moves toward the fixed block 61. When the slider 612 slides, it drives the two support rods 63 to rotate and expand outward, so that the support column 65 is in close contact with the inner wall of the valve body 4 and the valve body 4 is tightened and fixed. The two support columns 65 and a support block 62 are in close contact with the inner wall of the valve body 4, thereby tightening and fixing the valve body 4.

[0029] like Figures 4 - 7As shown, a plurality of pressing strips 51 are evenly movably connected to the surface of the locking tube 5 along its circumference. In this embodiment, the number of pressing strips 51 is four, and the pressing strips 51 can move closer to or away from the center of the locking tube 5. A push rod 511 for driving the movement of the pressing strips 51 is connected inside the locking tube 5; a slant rail 5104 is fixedly connected to the pressing strip 51. The slant rail 5104 is arranged inside the locking tube 5, and the thickness of the slant rail 5104 gradually increases in the direction away from the tightening assembly 6. A guide block 512 is fixedly connected to the push rod 511, and a slant groove 513 that is slidably matched with the slant rail 5104 is arranged on the guide block 512. When the push rod 511 moves inside the locking tube 5, it will drive the pressing strip 51 to move outwards. A connecting seat 58 is welded to one end of the locking tube 5, and the connecting seat 58 is fixedly connected to the rotating shaft 7. One end of the push rod 511 is fixedly connected with a stop block 514, and a return spring 56 is fixedly connected between the stop block 514 and the connecting seat 58; specifically in implementation: when the guide rod 66 moves inside the locking tube 5, the guide rod 66 drives the push rod 511 to move inwards, driving the four pressing strips 51 to move outwards, so that the pressing strips 51 are simultaneously in contact with the inner wall of the valve stem seat 41 and the inner wall of the through hole 42. The pressing strips 51 play a role in correcting the alignment, making the valve stem seat 41 align with the position of the through hole 42, ensuring the accurate position of the valve stem seat 41. And the pressing strips 51 press the inner wall of the valve stem seat 41, which also has the effect of locking and fixing the valve stem seat 41, ensuring the stable position of the valve stem seat 41 during welding.

[0030] Preferably, a pressure ring 52 is connected to the periphery of the locking tube 5 for pressing the valve stem seat 41; a limiting hole 53 that is slidably matched with the pressing strip 51 is arranged on the pressure ring 52 to ensure the stable sliding of the pressing strip 51. A moving block 54 is slidably connected in the limiting hole 53. One end of the pressing strip 51 is fixedly connected with a baffle 5101, and a first elastic member 55 is fixedly connected between the baffle 5101 and the moving block 54. The first elastic member 55 can be a spring. A guiding strip 57 that is slidably connected to the baffle 5101 is fixedly connected to the moving block 54, so that when the pressing strip 51 moves, it can drive the moving block 54 to slide in the limiting hole 53; when the valve body 4 and the valve stem seat 41 move along the surface of the locking tube 5, one end of the valve stem seat 41 contacts the surface of the pressure ring 52, and the valve stem seat 41 is pressed on the valve body 4 through the pressure ring 52.

[0031] Preferably, a limiting strip 67 is provided on the surface of the guide rod 66, and a limiting groove 510 for mating connection with the limiting strip 67 is provided on the locking tube 5. When the guide rod 66 is inserted into the locking tube 5, the limiting strip 67 is connected to the limiting groove 510, so that when the locking tube 5 rotates, it can drive the entire tightening assembly 6 to rotate, and then drive the valve body 4 to rotate. Moreover, a plurality of ratchet grooves 59 are provided on the surface of the locking tube 5. A bracket 69 is fixedly connected to the fixed block 61. One end of the bracket 69 is rotatably connected to a ratchet pawl 610 that cooperates with the ratchet groove 59. A second elastic member 611 is connected between the ratchet pawl 610 and the bracket 69. The second elastic member 611 makes the ratchet pawl 610 closely adhere to the surface of the locking tube 5. And through the arrangement of the ratchet pawl 610 and the ratchet groove 59, it is avoided that the guide rod 66 is retracted and separated from the locking tube 5, playing a role in fixing the locking tube 5 and the guide rod 66.

[0032] Preferably, a pair of retaining frames 5102 are fixedly connected to both ends of the pressing strip 51. The retaining frames 5102 are arranged inside the locking tube 5, and a C-shaped elastic sheet 5103 is fixedly connected to the retaining frames 5102. The elastic sheet 5103 contacts the inner wall of the locking tube 5. The elastic sheet 5103 plays a resetting role. When the guide block 512 does not apply pressure to the pressing strip 51, the elastic sheet 5103 drives the pressing strip 51 to automatically retract into the locking tube 5.

[0033] Working principle: During use, the rotating shaft 7 is fixed by being clamped tightly by the three-jaw chuck 2. Then, the locking tube 5 is inserted into the valve stem seat 41 and the valve body 4. Then, the tightening assembly 6 is placed inside the valve body 4. The support block 62 contacts the inner wall of the valve body 4, and the guide rod 66 is inserted into the locking tube 5. Then, the valve body 4 and the tightening assembly 6 are moved together in the direction close to the locking tube 5. During the movement, one end of the locking tube 5 abuts against the slider 612 and slides on the surface of the guide rod 66, driving the slider 612 to move in the direction close to the fixed block 61. When the slider 612 slides, it drives the two support rods 63 to rotate and expand outwards, so that the support columns 65 are in close contact with the inner wall of the valve body 4 and tightly fix the valve body 4. Through the two support columns 65 and one support block 62 being in close contact with the inner wall of the valve body 4, the tightening assembly 6 tightly fixes the valve body 4. And during the movement, the guide block 512 drives the pressing strip 51 inside the locking tube 5 to move outwards. The pressing strip 51 presses against the inner wall of the valve stem seat 41 and the inner wall of the through hole 42, so that the centers of the valve stem seat 41 and the through hole 42 are aligned. At the same time, the pressure ring 52 presses on one end of the valve stem seat 41, pressing the valve stem seat 41 against the valve body 4, thereby tightly fixing the valve body 4 and the valve stem seat 41. Then, the driving motor 3 drives the three-jaw chuck 2 to rotate, driving the valve body 4 and the valve stem seat 41 to rotate, and thus the valve stem seat can be welded at 360°.

[0034] Finally, it should be noted that in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0035] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vacuum butterfly valve welding turntable, characterized in that Including: A base (1), on which a fixed platform (101) is fixedly connected; A locking tube (5) and a tightening assembly (6), one end of the locking tube (5) is fixedly connected with a rotating shaft (7), and the rotating shaft (7) is connected to the fixed platform (101); A plurality of pressing strips (51) are evenly movably connected to the surface of the locking tube (5) along its circumferential direction, and a push rod (511) for driving the pressing strips (51) to move is connected inside the locking tube (5); When the tightening assembly (6) moves towards the locking tube (5), the tightening assembly (6) automatically tightens and fixes the valve body (4), and the tightening assembly (6) drives the push rod (511) to move, driving the pressing strips (51) to move outwards, and fixing the valve stem seat (41) on the valve body (4); The tightening assembly (6) includes a fixed block (61), a pair of support rods (63) are rotatably connected to the fixed block (61), and a guide rod (66) that can be inserted into the locking tube (5) is fixedly connected to the fixed block (61). A slider (612) is slidably connected to the surface of the guide rod (66), the surface of the slider (612) contacts one end of the locking tube (5), and a connecting rod (64) is rotatably connected between the slider (612) and the support rod (63); A support block (62) is fixedly connected to the fixed block (61), and the support block (62) contacts the inner wall of the valve body (4); A pressure ring (52) is connected to the periphery of the locking tube (5) for pressing the valve stem seat (41); A limiting strip (67) is provided on the surface of the guide rod (66), a limiting groove (510) that cooperates with the limiting strip (67) is provided on the locking tube (5), and a plurality of ratchet grooves (59) are provided on the surface of the locking tube (5). A bracket (69) is fixedly connected to the fixed block (61), and one end of the bracket (69) is rotatably connected with a ratchet pawl (610) that cooperates with the ratchet groove (59). A second elastic member (611) is connected between the ratchet pawl (610) and the bracket (69).

2. The vacuum butterfly valve welding turntable according to claim 1, characterized in that, An inclined rail (5104) is fixedly connected to the pressing strip (51), the inclined rail (5104) is arranged inside the locking tube (5), the thickness of the inclined rail (5104) gradually increases along the direction away from the tightening assembly (6), and a guide block (512) is fixedly connected to the push rod (511). An inclined groove (513) that slidably cooperates with the inclined rail (5104) is provided on the guide block (512).

3. A vacuum butterfly valve welding turntable according to claim 2, characterized in that, One end of the support rod (63) is fixedly connected with a support column (65) for tightening against the inner wall of the valve body (4), and a cylindrical spring (68) is connected between the slider (612) and the fixed block (61), and the cylindrical spring (68) is connected to the surface of the guide rod (66).

4. A vacuum butterfly valve valve welding turntable according to claim 3, characterized in that, One end of the locking tube (5) is fixedly connected with a connection seat (58), the connection seat (58) is fixedly connected with the rotating shaft (7), and one end of the push rod (511) is fixedly connected with a stop block (514), and a return spring (56) is fixedly connected between the stop block (514) and the connection seat (58).

5. The vacuum butterfly valve valve welding turntable according to claim 4, characterized in that, The pressing ring (52) is provided with a limiting hole (53) that slidably cooperates with the pressing strip (51). A moving block (54) is slidably connected within the limiting hole (53). One end of the pressing strip (51) is fixedly connected to a baffle (5101). A first elastic member (55) is fixedly connected between the baffle (5101) and the moving block (54). A guiding strip (57) that slidably connects with the baffle (5101) is fixedly connected to the moving block (54).

6. The vacuum butterfly valve valve welding turntable according to claim 5, characterized in that, A pair of retaining frames (5102) are fixedly connected to both ends of the pressing strip (51). A C-shaped elastic sheet (5103) is fixedly connected to the retaining frame (5102). The elastic sheet (5103) contacts the inner wall of the locking tube (5).

7. A vacuum butterfly valve valve welding turntable according to claim 6, characterized in that, A three-jaw chuck (2) for fixing the rotating shaft (7) is installed on the fixed table (101). A driving motor (3) for driving the three-jaw chuck (2) to rotate is installed on the fixed table (101).

Images