CN220481142U - End face polishing device for valve - Google Patents

Abstract

The utility model discloses an end face polishing device for a valve, which belongs to the technical field of valve processing and comprises a frame and a self-centering clamping device arranged on the frame, wherein the frame sequentially comprises a driving cavity, a polishing cavity and a dust collecting cavity from top to bottom, the self-centering clamping device is arranged in the polishing cavity, a sliding through hole penetrates through the driving cavity and the polishing cavity, polishing sliding seats are symmetrically arranged in the sliding through hole, polishing devices are arranged on the side walls of the polishing sliding seats, and the polishing devices are oppositely and symmetrically arranged on two sides of the self-centering clamping device. The utility model particularly provides an end face polishing device for a valve, which realizes self-centering fixation of the valve through a clamping device with bidirectional adjustment, and can realize synchronous polishing of end faces at two sides of the valve through symmetrically arranged polishing devices, thereby greatly improving polishing efficiency.

Description

End face polishing device for valve

Technical Field

The utility model belongs to the technical field of valve machining, and particularly relates to an end face polishing device for a valve.

Background

Valves are mechanical devices that control the amount of fluid flow and are widely used. The outer shell of the valve is usually manufactured through casting, and the port surface of the casting needs to be polished after the casting is finished to ensure the surface quality, so that the flange part of the pipeline is bonded to prevent water leakage.

When the existing polishing device is used, only one end face of the valve can be polished, the valve needs to be disassembled after the polishing of the one end face is finished, the valve is fixed again after the direction is adjusted, a great amount of time is consumed in the assembling and disassembling process, and the working efficiency is reduced; in addition, can produce a large amount of dust piece when polishing, current grinding device can't in time collect the dust piece of polishing production, causes the environment mess easily.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the utility model provides the end face polishing device for the valve, which realizes self-centering fixation of the valve through the clamping device with two-way adjustment, and can realize synchronous polishing of the end faces at two sides of the valve through the symmetrically arranged polishing devices, thereby greatly improving polishing efficiency.

The technical scheme adopted by the utility model is as follows: the utility model provides an end face polishing device for a valve, which comprises a rack and a self-centering clamping device arranged on the rack, wherein the rack sequentially comprises a driving cavity, a polishing cavity and a dust collecting cavity from top to bottom, the self-centering clamping device is arranged in the polishing cavity, a sliding through hole is penetrated between the driving cavity and the polishing cavity, polishing sliding seats are symmetrically arranged in the sliding through hole, polishing devices are arranged on the side walls of the polishing sliding seats, the polishing devices are oppositely and symmetrically arranged on two sides of the self-centering clamping device, the self-centering clamping device is used for realizing automatic alignment of the center of the valve, clamping and fixing of the valve, and the end faces on two sides of the valve are synchronously polished by the polishing devices which are oppositely and symmetrically arranged; the driving cavity rotation is equipped with first two-way screw rod, and the both ends symmetry of first two-way screw rod is equipped with spiral shell and to opposite screw thread, the driving cavity outside is equipped with grinding accommodate motor and speed reducer, grinding accommodate motor passes through the speed reducer and links to each other with first two-way screw rod, and every slide upper wall of polishing is equipped with an adjusting screw seat, and two sets of grinding device's adjusting screw seat respectively with the both ends threaded connection of first two-way screw rod, grinding accommodate motor passes through the speed reducer to drive first two-way screw rod rotation, and first two-way screw rod passes through two sets of grinding device that adjusting screw seat drive symmetry set up and slides along sliding through-hole and first two-way screw rod to be close to each other the middle part from the fixed valve of centering clamping device, realize both ends synchronous polishing.

Further, be equipped with synchronous actuating mechanism in the driving chamber, synchronous actuating mechanism includes synchronous pivot, feather key, drive assembly and synchronous motor, synchronous pivot rotates and locates the driving intracavity, the feather key sets up in synchronous pivot's lateral wall along synchronous pivot's axial, be equipped with synchronous chamber in the slide of polishing, drive assembly locates each synchronous intracavity of slide of polishing respectively, and drive assembly symmetry slides and locates in the synchronous pivot, drive assembly includes driving pulley, driven pulley and drive belt, and the driving pulley rotates and locates synchronous intracavity, the middle part of driving pulley runs through and is equipped with the sliding sleeve, the sliding sleeve rotates and runs through the slide of polishing, and the sliding sleeve inner wall is equipped with the keyway, synchronous pivot slip runs through and locates in the sliding sleeve, and feather key slip card locates in the keyway, feather key and keyway make sliding sleeve and driving pulley can follow synchronous pivot's axial slip, and synchronous pulley synchronous rotation all the time along step-by step pivot, driven pulley rotates and locates synchronous chamber diapire, the drive belt is around locating between driven pulley and the driving pulley, grinding device links to each other with the driven pulley, synchronous motor locates the frame lateral wall, and synchronous motor links to each other with synchronous motor and synchronous pulley rotates with synchronous pulley, and drive pulley rotates through synchronous pulley, and drive pulley and adjusts the synchronous pulley through the synchronous pulley rotation, and drive valve is rotated along synchronous pulley, and the synchronous pulley is rotated.

The polishing device comprises a polishing rotating shaft and a polishing sheet fixedly connected to the polishing rotating shaft, wherein the polishing rotating shaft is coaxially connected with the driven belt pulley, and the driven belt pulley drives the polishing sheet to synchronously rotate through the polishing rotating shaft when rotating.

Preferably, the bottom wall of the polishing cavity is symmetrically provided with dust collection through holes communicated with the dust collection cavity, a dust collection groove is slidably arranged in the dust collection cavity, the dust collection groove is arranged right below the dust collection through holes, and the dust collection through holes and the dust collection groove are convenient for collecting dust and fragments generated by polishing.

Wherein the self-centering clamping device comprises a clamping motor, a second bidirectional screw rod, a clamping sliding frame and a clamping plate, a clamping sliding hole is penetrated and arranged on the polishing cavity, an adjusting frame is extended and arranged in the clamping sliding hole, the clamping sliding frame symmetrically slides and clamps the inner bottom wall of the polishing cavity, one end of the clamping sliding frame slides and penetrates through the clamping sliding hole and extends out of the adjusting frame, the second bidirectional screw rod is rotationally arranged in the adjusting frame, two ends of the second bidirectional screw rod are symmetrically provided with threads with opposite screw directions, the clamping motor is arranged on the outer side wall of the adjusting frame, an output shaft of the clamping motor is connected with the second bidirectional screw rod, two sets of centre gripping balladeur train of symmetry setting respectively with the both ends threaded connection of second bidirectional screw rod, the centre gripping cardboard is located the centre gripping balladeur train upper wall, is equipped with the inverted V-arrangement draw-in groove on the centre gripping cardboard, and the centre gripping motor drives the rotation of second bidirectional screw rod, and the second bidirectional screw rod drives two sets of centre gripping balladeur trains of symmetry setting and slides in opposite directions and be close to or move away from in opposite directions to adjust the distance between two sets of centre gripping balladeur trains, the valve centre gripping of the different length of adaptation of being convenient for, the centre gripping balladeur train of symmetry removal is convenient for make the center automatic adjustment of valve align with the midpoint of second bidirectional screw rod, and the inverted V-arrangement draw-in groove is convenient for fix the valve of different diameters.

Further, the inverted V-shaped clamping groove is internally provided with a zigzag rubber anti-slip strip, and the zigzag rubber anti-slip strip increases friction with the circumferential surface of the valve casting so as to be beneficial to achieving better fixation.

Preferably, the drive intracavity is equipped with down the piezoelectric push rod, it runs through the cavity upper wall of polishing and locates the intracavity of polishing to lower the piezoelectric push rod, the bottom of piezoelectric push rod is equipped with the clamp plate down, drives the clamp plate and moves down through the piezoelectric push rod is flexible down to be convenient for compress tightly fixedly to valve foundry goods upper wall, cooperation inverted V shape draw-in groove realizes the firm fixed to the not unidimensional valve foundry goods.

Preferably, clamp plate diapire threaded connection is equipped with the fixture block, the fixture block is the setting of reverse round platform shape, and the fixture block is convenient for block into valve foundry goods opening, and then further spacing to the valve foundry goods, and the fixture block of reverse round platform shape setting is convenient for carry out the internal stay fixed to different internal diameter openings.

As the further improvement of this scheme, centre gripping balladeur train upper wall symmetry is equipped with the slide bar, the symmetry is equipped with the slide hole on the centre gripping cardboard, the centre gripping cardboard is located on the slide bar through slide hole slip card, be equipped with lifting electricity push rod in the dust collection chamber, the upper end of lifting electricity push rod runs through the chamber diapire of polishing and locates the intracavity of polishing, the upper end of lifting electricity push rod is equipped with the lift plate, the top of lifting plate is located to the centre gripping cardboard, and when lifting electricity push rod was flexible, the lift plate drove the centre gripping cardboard and slide along the slide bar and upwards move, the governing valve height of being convenient for.

The beneficial effects obtained by the utility model by adopting the structure are as follows: according to the end face polishing device for the valve, the self-centering clamping device is utilized to automatically align the center of the valve, the valve is clamped and fixed, and the end faces on two sides of the valve are synchronously polished by the symmetrically arranged polishing devices in opposite directions; the synchronous driving mechanism utilizes a transmission belt and a sliding key, only one driving is needed to realize synchronous rotation of two groups of symmetrically arranged polishing devices, and dust collection through holes and dust collection grooves are convenient for collecting dust and fragments generated by polishing; the clamping motor is utilized to drive the second bidirectional screw rod to rotate, the second bidirectional screw rod drives the two groups of clamping sliding racks which are symmetrically arranged to slide in opposite directions to be close to or move away from each other in opposite directions, so that the distance between the two groups of clamping boards is adjusted, the clamping boards are convenient to adapt to valve clamping of different lengths, the symmetrical moving clamping sliding racks are convenient to enable the center of a valve to be automatically adjusted to be aligned with the middle point of the second bidirectional screw rod, the inverted V-shaped clamping groove is convenient to fix valves of different diameters, the pressing plate is driven to move downwards through the stretching of the lower piezoelectric push rod, the upper wall of a valve casting is convenient to compress tightly and fix, and the inverted V-shaped clamping groove is matched to realize the stable fixation of the valve casting of different sizes.

Drawings

FIG. 1 is a schematic structural view of an end face polishing device for a valve according to the present utility model;

FIG. 2 is a side view of a valve end face polishing device according to the present utility model;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic view of a valve end polishing apparatus according to another embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a synchronous driving mechanism provided by the utility model;

fig. 6 is a schematic structural diagram of a driving pulley according to the present utility model.

The self-centering clamping device comprises a frame 1, a frame 2, a self-centering clamping device 3, a driving cavity 4, a polishing cavity 5, a dust collecting cavity 6, a sliding through hole 7, a polishing sliding seat 8, a first bidirectional screw rod 9, a polishing adjusting motor 10, a speed reducer 11, an adjusting screw seat 12, a synchronous driving mechanism 13, a synchronous rotating shaft 14, a sliding key 15, a transmission component 16, a synchronous motor 17, a synchronous cavity 18, a driving pulley 19, a driven pulley 20, a transmission belt 21, a sliding sleeve 22, a key groove 23, a polishing rotating shaft 24, a polishing piece 25, a dust collecting through hole 26, a dust collecting groove 27, a clamping motor 28, a second bidirectional screw rod 29, a clamping sliding frame 30, a clamping plate 31, a clamping sliding hole 32, an adjusting frame 33, an inverted V-shaped clamping groove 34, a zigzag rubber anti-sliding bar 35, a lower piezoelectric push rod 36, a pressing plate 37, a clamping block 38, a sliding rod 39, a sliding hole 40, a lifting electric push rod 41 and a lifting plate.

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model; all other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate orientation or positional relationships based on those shown in the drawings, merely to facilitate description of the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

Embodiment one: as shown in fig. 1-4, the end surface polishing device for the valve provided by the utility model comprises a frame 1 and a self-centering clamping device 2 arranged on the frame 1, wherein the frame 1 sequentially comprises a driving cavity 3, a polishing cavity 4 and a dust collecting cavity 5 from top to bottom, the self-centering clamping device 2 is arranged in the polishing cavity 4, a sliding through hole 6 is penetrated between the driving cavity 3 and the polishing cavity 4, polishing sliding seats 7 are symmetrically arranged in the sliding through hole 6, polishing devices are arranged on the side walls of the polishing sliding seats 7, the polishing devices are symmetrically arranged on two sides of the self-centering clamping device 2 in opposite directions, the self-centering clamping device 2 is used for realizing automatic alignment of the valve center, clamping and fixing of the valve, and the end surfaces on two sides of the valve are synchronously polished by the polishing devices symmetrically arranged in opposite directions; the driving cavity 3 rotation is equipped with first bi-directional screw rod 8, and the both ends symmetry of first bi-directional screw rod 8 is equipped with spiral shell and is to opposite screw thread, the driving cavity 3 outside is equipped with grinding accommodate motor 9 and speed reducer 10, grinding accommodate motor 9 links to each other with first bi-directional screw rod 8 through speed reducer 10, and every grinding slide 7 upper wall is equipped with an adjusting screw seat 11 respectively, and two sets of grinding device's adjusting screw seat 11 respectively with the both ends threaded connection of first bi-directional screw rod 8, grinding accommodate motor 9 passes through speed reducer 10 and drives first bi-directional screw rod 8 rotation, and first bi-directional screw rod 8 passes through two sets of grinding device that adjusting screw seat 11 drive symmetry set up and slides along sliding through-hole 6 and first bi-directional screw rod 8 to be close to each other and center self-centering clamping device 2 fixed valve realizes the both ends synchronous grinding.

Referring to fig. 3, 5 and 6, a synchronous driving mechanism 12 is disposed in the driving cavity 3, the synchronous driving mechanism 12 includes a synchronous rotating shaft 13, a sliding key 14, a transmission component 15 and a synchronous motor 16, the synchronous rotating shaft 13 is rotatably disposed in the driving cavity 3, the sliding key 14 is disposed on a side wall of the synchronous rotating shaft 13 along an axial direction of the synchronous rotating shaft 13, a synchronous cavity 17 is disposed in the polishing slide 7, the transmission component 15 is respectively disposed in the synchronous cavity 17 of each polishing slide 7, the transmission component 15 is symmetrically and slidably disposed on the synchronous rotating shaft 13, the transmission component 15 includes a driving pulley 18, a driven pulley 19 and a driving belt 20, the driving pulley 18 is rotatably disposed in the synchronous cavity 17, a sliding sleeve 21 is disposed in a middle portion of the driving pulley 18, the sliding sleeve 21 rotatably penetrates the polishing slide 7, a key slot 22 is disposed on an inner wall of the sliding sleeve 21, the synchronous rotating shaft 13 is arranged in the sliding sleeve 21 in a sliding way, the sliding key 14 is clamped in the key groove 22 in a sliding way, the sliding sleeve 21 and the driving pulley 18 can slide along the axial direction of the synchronous rotating shaft 13 through the sliding key 14 and the key groove 22, meanwhile, the driving pulley 18 always rotates synchronously along with the synchronous rotating shaft 13, the driven pulley 19 rotates on the bottom wall of the synchronous cavity 17, the driving belt 20 is wound between the driven pulley 19 and the driving pulley 18, the polishing device is connected with the driven pulley 19, the synchronous motor 16 is arranged on the side wall of the frame 1, the synchronous motor 16 is connected with the synchronous rotating shaft 13, the synchronous motor 16 drives the synchronous rotating shaft 13 to rotate, the synchronous rotating shaft 13 drives the driving pulley 18 to synchronously rotate through the sliding key 14, the driving pulley 18 drives the driven pulley 19 to rotate through the driving belt 20, the driven pulley 19 drives the polishing device to polish, the adjusting screw seat 11 drives the polishing slide seat 7 to slide, the polishing sliding seat 7 drives the driving belt pulley 18 to slide along the axial direction of the synchronous rotating shaft 13 so as to adjust the distance from the polishing device to the end surface of the valve; the polishing device comprises a polishing rotating shaft 23 and a polishing sheet 24 fixedly connected to the polishing rotating shaft 23, wherein the polishing rotating shaft 23 is coaxially connected with the driven belt pulley 19, and the polishing sheet 24 is driven to synchronously rotate by the polishing rotating shaft 23 when the driven belt pulley 19 rotates.

As shown in fig. 4, the bottom wall of the polishing cavity 4 is symmetrically provided with dust collection through holes 25 communicated with the dust collection cavity 5, the dust collection cavity 5 is slidably provided with dust collection grooves 26, the dust collection grooves 26 are arranged right below the dust collection through holes 25, and the dust collection through holes 25 and the dust collection grooves 26 are convenient for collecting dust and fragments generated by polishing.

As shown in fig. 1-4, the self-centering clamping device 2 comprises a clamping motor 27, a second bidirectional screw 28, a clamping sliding frame 29 and a clamping plate 30, wherein a clamping sliding hole 31 is arranged on the polishing cavity 4 in a penetrating manner, an adjusting frame 32 is arranged in an extending manner in the clamping sliding hole 31, the clamping sliding frame 29 is symmetrically and slidably clamped on the inner bottom wall of the polishing cavity 4, one end of the clamping sliding frame 29 penetrates through the clamping sliding hole 31 in a sliding manner and extends out of the adjusting frame 32, the second bidirectional screw 28 is rotatably arranged in the adjusting frame 32, two ends of the second bidirectional screw 28 are symmetrically provided with threads with opposite screw directions, the clamping motor 27 is arranged on the outer side wall of the adjusting frame 32, and an output shaft of the clamping motor 27 is connected with the second bidirectional screw 28, the two groups of clamping carriages 29 which are symmetrically arranged are respectively in threaded connection with two ends of the second bidirectional screw 28, the clamping plates 30 are arranged on the upper wall of the clamping carriage 29, an inverted V-shaped clamping groove 33 is formed in the clamping plates 30, the clamping motor 27 drives the second bidirectional screw 28 to rotate, the second bidirectional screw 28 drives the two groups of clamping carriages 29 which are symmetrically arranged to slide towards each other or move away from each other in opposite directions, so that the distance between the two groups of clamping plates 30 is adjusted, the clamping carriages 29 which are symmetrically moved are convenient for adapting to clamping of valves with different lengths, the centers of the valves are automatically adjusted to be aligned with the middle points of the second bidirectional screw 28, and the inverted V-shaped clamping groove 33 is convenient for fixing the valves with different diameters; the inverted V-shaped clamping groove 33 is internally provided with a zigzag rubber anti-slip strip 34, and the zigzag rubber anti-slip strip 34 increases friction with the circumferential surface of the valve casting so as to be beneficial to achieving better fixation; the driving cavity 3 is internally provided with a lower piezoelectric push rod 35, the lower piezoelectric push rod 35 penetrates through the upper wall of the polishing cavity 4 and is arranged in the polishing cavity 4, the bottom end of the lower piezoelectric push rod 35 is provided with a pressing plate 36, the pressing plate 36 is driven to move downwards through the extension of the lower piezoelectric push rod 35, so that the upper wall of the valve casting is conveniently pressed and fixed, and the valve casting with different sizes is firmly fixed by being matched with the inverted V-shaped clamping groove 33.

Firstly, a valve casting to be polished is placed in the inverted V-shaped clamping grooves 33 of two groups of clamping plates 30, then a clamping motor 27 is started, the clamping motor 27 drives a second bidirectional screw rod 28 to rotate, the second bidirectional screw rod 28 drives two groups of clamping carriages 29 which are symmetrically arranged to move away from each other, so that the distance between the two groups of clamping plates 30 is adjusted, the length of the valve is adapted, the clamping carriages 29 which are symmetrically moved automatically adjust the center of the valve to be aligned with the middle point of the second bidirectional screw rod 28, when the side walls of the two groups of clamping carriages 29 are respectively attached to the flange of the valve end face, the clamping motor 27 is controlled to stop working, the center of the valve is automatically adjusted to be aligned with the middle point of the second bidirectional screw rod 28, then a lower piezoelectric push rod 35 is controlled to stretch, a pressing plate 36 is driven to move downwards by stretching the lower piezoelectric push rod 35, the upper wall of the valve casting is pressed and fixed, the valve castings with different sizes are firmly fixed by matching with the inverted V-shaped clamping groove 33, then the synchronous motor 16 and the polishing adjusting motor 9 are started, the polishing adjusting motor 9 drives the first bidirectional screw rod 8 to rotate through the speed reducer 10, the first bidirectional screw rod 8 drives two groups of polishing devices to slide along the sliding through hole 6 and the first bidirectional screw rod 8 through the symmetrically arranged adjusting screw seat 11, thereby approaching to the valve fixed by the middle self-centering clamping device 2, the polishing sliding seat 7 drives the driving pulley 18 to slide along the axial direction of the synchronous rotating shaft 13, the synchronous motor 16 drives the synchronous rotating shaft 13 to rotate, the synchronous rotating shaft 13 drives the driving pulley 18 to synchronously rotate through the sliding key 14, the driving pulley 18 drives the driven pulley 19 to rotate through the driving belt 20, the driven pulley 19 drives the polishing sheet 24 to synchronously rotate through the polishing rotating shaft 23, and only one drive is needed to realize the synchronous rotation of the symmetrically arranged two groups of polishing devices, therefore, synchronous polishing of end faces on two sides of the valve is realized, and polishing efficiency is greatly improved.

Embodiment two: based on the above embodiment, in another embodiment of the present utility model, the upper wall of the clamping carriage 29 is symmetrically provided with the sliding rod 38, the clamping plate 30 is symmetrically provided with the sliding hole 39, the clamping plate 30 is slidably clamped on the sliding rod 38 through the sliding hole 39, the dust collecting cavity 5 is provided with the lifting electric push rod 40, the upper end of the lifting electric push rod 40 penetrates through the bottom wall of the polishing cavity 4 and is arranged in the polishing cavity 4, the upper end of the lifting electric push rod 40 is provided with the lifting plate 41, the clamping plate 30 is arranged above the lifting plate 41, if the valve end face is lower than the polishing sheet 24, the lifting electric push rod 40 is controlled to drive the lifting plate 41 to move upwards, and the lifting plate 41 drives the clamping plate 30 to slide upwards along the sliding rod 38, so as to adjust the valve height.

Embodiment III: based on the above embodiment, in another embodiment of the present utility model, the bottom wall of the pressing plate 36 is in threaded connection with a clamping block 37, the clamping block 37 is in an inverted circular truncated cone shape, the clamping block 37 is convenient to clamp into the opening of the valve casting, further the valve casting is further limited, and the clamping block 37 in the inverted circular truncated cone shape is convenient to support and fix the openings with different inner diameters.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims (9)

1. An end face grinding device for valve, its characterized in that: the self-centering clamping device is arranged in the machine frame, the machine frame sequentially comprises a driving cavity, a polishing cavity and a dust collecting cavity from top to bottom, the self-centering clamping device is arranged in the polishing cavity, a sliding through hole is penetrated between the driving cavity and the polishing cavity, polishing sliding seats are symmetrically arranged in the sliding through hole, polishing devices are arranged on the side walls of the polishing sliding seats, and the polishing devices are symmetrically arranged on two sides of the self-centering clamping device in opposite directions; the inner wall of the driving cavity is provided with a first bidirectional screw rod in a rotating mode, threads opposite in screw direction are symmetrically arranged at two ends of the first bidirectional screw rod, a polishing adjusting motor and a speed reducer are arranged on the outer side of the driving cavity, the polishing adjusting motor is connected with the first bidirectional screw rod through the speed reducer, each polishing sliding seat upper wall is provided with an adjusting screw seat, and the adjusting screw seats of the two groups of polishing devices are respectively in threaded connection with two ends of the first bidirectional screw rod.

2. The end face polishing device for a valve according to claim 1, wherein: the synchronous drive mechanism comprises a synchronous rotating shaft, a sliding key, a transmission assembly and a synchronous motor, wherein the synchronous rotating shaft is rotationally arranged in the drive cavity, the sliding key is axially arranged on the side wall of the synchronous rotating shaft along the synchronous rotating shaft, a synchronous cavity is arranged in each polishing sliding seat, the transmission assembly is respectively arranged in the synchronous cavity of each polishing sliding seat, the transmission assembly symmetrically slides on the synchronous rotating shaft, the transmission assembly comprises a driving pulley, a driven pulley and a transmission belt, the driving pulley is rotationally arranged in the synchronous cavity, the middle part of the driving pulley is penetrated and provided with a sliding sleeve, the sliding sleeve rotationally penetrates through the polishing sliding seat, the inner wall of the sliding sleeve is provided with a key groove, the synchronous rotating shaft is slidingly penetrated and arranged in the sliding sleeve, the sliding key is slidingly clamped in the key groove, the driven pulley is rotationally arranged on the bottom wall of the synchronous cavity, the transmission belt is wound between the driven pulley and the driving pulley, the polishing device is connected with the driven pulley, the synchronous motor is arranged on the side wall of the frame, and the synchronous motor is connected with the synchronous rotating shaft.

3. The end face polishing device for a valve according to claim 2, wherein: the self-centering clamping device comprises a clamping motor, a second bidirectional screw rod, a clamping sliding frame and a clamping plate, wherein a clamping sliding hole is penetrated and arranged on the polishing cavity, an adjusting frame is extended and arranged on the clamping sliding hole, the inner bottom wall of the polishing cavity is symmetrically and slidably clamped and arranged on the clamping sliding frame, one end of the clamping sliding frame penetrates through the clamping sliding hole in a sliding manner and extends out of the adjusting frame, the second bidirectional screw rod is rotatably arranged in the adjusting frame, the both ends symmetry of second bidirectional screw rod is equipped with the spiral shell and to opposite screw thread, and the centre gripping motor is located on the regulating frame lateral wall, and the output shaft of centre gripping motor links to each other with the second bidirectional screw rod, and two sets of centre gripping balladeur train of symmetry setting respectively with the both ends threaded connection of second bidirectional screw rod, centre gripping cardboard is located centre gripping balladeur train upper wall, is equipped with the V-arrangement draw-in groove of falling on the centre gripping cardboard.

4. The end face polishing device for a valve according to claim 1, wherein: the polishing cavity bottom wall is symmetrically provided with dust collection through holes communicated with the dust collection cavity, the dust collection cavity is internally provided with dust collection grooves in a sliding mode, and the dust collection grooves are arranged right below the dust collection through holes.

5. A valve end face polishing apparatus according to claim 3, wherein: the driving cavity is internally provided with a lower piezoelectric push rod, the lower piezoelectric push rod penetrates through the upper wall of the polishing cavity and is arranged in the polishing cavity, and the bottom end of the lower piezoelectric push rod is provided with a pressing plate.

6. The valve end face polishing device according to claim 5, wherein: clamping blocks are arranged on the bottom wall of the pressing plate in threaded connection, and are arranged in an inverted truncated cone shape.

7. A valve end face polishing apparatus according to claim 3, wherein: and a zigzag rubber anti-slip strip is arranged in the inverted V-shaped clamping groove.

8. A valve end face polishing apparatus according to claim 3, wherein: the clamping sliding rack is characterized in that sliding rods are symmetrically arranged on the upper wall of the clamping sliding rack, sliding holes are symmetrically formed in the clamping plates, the clamping plates are arranged on the sliding rods through the sliding cards of the sliding holes, lifting electric push rods are arranged in the dust collecting cavity, the upper ends of the lifting electric push rods penetrate through the bottom wall of the polishing cavity and are arranged in the polishing cavity, lifting plates are arranged at the upper ends of the lifting electric push rods, and the clamping plates are arranged above the lifting plates.

9. The end face polishing device for a valve according to claim 2, wherein: the polishing device comprises a polishing rotating shaft and a polishing sheet fixedly connected to the polishing rotating shaft, and the polishing rotating shaft is coaxially connected with the driven belt wheel.