CN212240414U - Grinding equipment for upper sealing ring of valve inner valve seat - Google Patents

Abstract

The invention discloses grinding equipment for a sealing ring on a valve seat in a valve, which comprises a first driving mechanism, a base, an inclined guide rail and a driving connecting mechanism, wherein the driving connecting mechanism comprises a second driving mechanism, a spindle box and a facing head, a rotating shaft is arranged in the spindle box, and the facing head comprises a shell, a sliding part, a moving rod and a third driving mechanism; the processing of the cutter comprises sharpening; under the drive of the second driving mechanism, the rotating shaft rotates to drive the facing head to rotate, and further drives the machining tool to rotate; under the drive of the first driving mechanism, the machining cutter enters the opening of the valve to do linear motion until the cutter passes through the sealing ring; under the drive of the third driving mechanism, the moving rod rotates to drive the sliding part to move along the length direction of the sliding part, and then the rotating machining tool is driven to move along the length direction of the sliding part until the knife is in contact with the sealing surface of the sealing ring to machine the sealing ring. The grinding equipment provided by the invention has the advantages that the processing efficiency is improved, the processing precision is improved, and the gate plate and the valve body are matched.

Description

Grinding equipment for upper sealing ring of valve inner valve seat

Technical Field

The invention relates to the field of machine manufacturing, in particular to grinding equipment for a sealing ring on a valve seat in a valve.

Background

At present, a manual grinding mode is usually adopted for machining a sealing surface of a pipeline gate valve, a self-made grinding disc is manually placed after a sealing ring is welded into a valve body, then a worker butts a hand-held power head with the grinding disc to grind the sealing surface, the process can only polish the sealing surface, but cannot correct the size of the sealing surface, so that the production yield of the process is extremely low, generally does not exceed forty percent, and the requirement on the proficiency of an operator is high.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a grinding device for a sealing ring on a valve seat in a valve, which is used for improving the processing precision and the production efficiency and adopts the following technical scheme:

the invention provides grinding equipment for a sealing ring on a valve seat in a valve, which is used for processing a sealing surface of the sealing ring in the valve, wherein the valve is provided with an opening and comprises a first driving mechanism, a base, an inclined guide rail arranged on the base and a driving connecting mechanism arranged on the inclined guide rail, one side of the driving connecting mechanism is provided with the valve, an included angle is kept between the inclined guide rail and a horizontal plane, and the length direction of the inclined guide rail is parallel to the central line of the sealing ring;

the driving connection mechanism comprises a second driving mechanism, a spindle box and a facing head arranged on one side of the spindle box close to the valve, a rotating shaft fixedly connected with the facing head is arranged in the spindle box, the facing head comprises a shell, a sliding part arranged on the outer side of the shell, and a moving rod and a third driving mechanism which are arranged in the shell, and the sliding part and the moving rod are arranged in parallel and are connected through a connecting plate;

one end of the facing head, which is close to the valve, is provided with a processing cutter fixedly connected with the sliding piece, and the processing cutter comprises a cutter;

under the drive of the second driving mechanism, the rotating shaft rotates to drive the facing head to rotate, and further drives the machining tool to rotate;

under the drive of the first driving mechanism, the rotating machining cutter enters the opening of the valve to be machined to do linear motion until the cutter knife passes through the sealing ring;

under the drive of the third driving mechanism, the moving rod rotates to drive the sliding piece to move along the length direction of the sliding piece, and then the rotating machining tool is driven to move along the length direction of the sliding piece, so that the rotating grinding tool is in contact with the sealing surface of the sealing ring to machine the sealing ring.

Further, the facing head is still established including the cover nut on the carriage release lever and the belt pulley of being connected with the carriage release lever, the connecting plate is used for coupling nut and slider under third actuating mechanism's drive, the belt pulley rotates and drives the carriage release lever and rotate, and the carriage release lever rotates and drives the nut and remove along the length direction of carriage release lever, and then drives the slider and remove along its length direction.

Further, the processing cutter further comprises an electric spindle connected with the sliding piece through a fixed seat and a cutter bar connected with the electric spindle, the knife grinder is arranged at one end, far away from the facing head, of the cutter bar, and the electric spindle is used for driving the cutter bar and the knife grinder to rotate synchronously.

Furthermore, the knife sharpening is of a disc structure, and the surface of the knife sharpening, which is close to the knife bar, is of a frosted structure.

Further, the number of the inclined guide rails is two, the number of the driving connecting mechanisms is two, the two inclined guide rails are arranged oppositely, and the valve is arranged between the two inclined guide rails.

Further, the grinding equipment for the upper sealing ring of the valve seat in the valve further comprises a transmission case arranged on one side, away from the facing head, of the driving connection mechanism, a transmission mechanism connected with a second driving mechanism is arranged in the transmission case, and under the driving of the second driving mechanism, the transmission mechanism drives the rotating shaft to rotate so as to drive the facing head to rotate and further drive the machining tool to rotate.

Further, the transmission mechanism comprises a plurality of gears which are matched with each other.

Further, the processing cutter can be detachably arranged on the sliding piece, and the grinding cutter can be detachably arranged on the cutter rod.

Further, the sealing ring grinding equipment further comprises a liquid injection device arranged outside the driving connection mechanism, and liquid can be poured on the machining tool through the liquid injection device.

Further, a bearing seat used for fixing the moving rod is arranged on one side, away from the belt pulley, of the moving rod.

The technical scheme provided by the invention has the following beneficial effects:

a. the grinding equipment for the sealing ring on the valve inner valve seat has the advantages that the machining efficiency is improved by 4-6 times compared with a universal machining mode; the angle error reaches within five thousandths, the flatness reaches within four micrometers, the machining precision is high, and compared with the existing machining process, the machining process is improved by two levels;

b. the grinding equipment for the sealing ring on the valve seat in the valve, provided by the invention, can be used for conveniently processing valves with various specifications, so that the grinding equipment provided by the application has universality;

c. automatic production is realized, the production efficiency is improved, and the labor intensity is reduced;

d. the grinding equipment for the sealing ring on the valve seat in the valve can achieve the matching degree of the flashboard and the valve body.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a perspective view of a grinding device for a seal ring on a valve seat in a valve according to an embodiment of the present invention;

FIG. 2 is a perspective view of a driving connection mechanism of a grinding device for a sealing ring on a valve seat in a valve according to an embodiment of the invention;

FIG. 3 is a top view of a grinding device for a seal ring on a valve seat in a valve according to an embodiment of the present invention;

FIG. 4 is a side view of a driving connection mechanism of a grinding device for a sealing ring on a valve seat in a valve according to an embodiment of the invention;

FIG. 5 is a sectional view of a driving connection mechanism of a grinding device for a sealing ring on a valve seat in a valve according to an embodiment of the invention;

FIG. 6 is a sectional view of a driving connection mechanism of a grinding device for a sealing ring on a valve seat in a valve according to an embodiment of the invention;

FIG. 7 is a cross-sectional view of a valve provided by an embodiment of the present invention;

FIG. 8 is a perspective view of a valve provided in accordance with an embodiment of the present invention showing a seal ring;

FIG. 9 is a cross-sectional view of a knife blade of the grinding device for the sealing ring on the valve seat in the valve according to the embodiment of the present invention abutting against the sealing surface of the sealing ring;

fig. 10 is an enlarged view of the interference between the grinding tool and the sealing surface of the sealing ring in fig. 9 of the grinding device for the sealing ring on the valve seat in the valve according to the embodiment of the invention.

Wherein the reference numerals include: 1-base, 2-inclined guide rail, 3-drive connecting mechanism, 31-second drive mechanism, 32-main spindle box, 33-facing disk, 331-sliding part, 332-connecting plate, 333-moving rod, 334-nut, 335-shell, 336-belt pulley, 337-bearing seat, 4-valve, 5-processing cutter, 51-electric spindle, 52-cutter bar, 53-knife rest, 54-cutter seat, 6-tooling, 7-transmission mechanism, 8-sealing ring and 81-sealing surface.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

The invention provides a valve with an opening, wherein the valve is provided with an opening, a sealing ring 8 made of metal is arranged in the valve, the sealing ring 8 is a disc structure which has a hollow structure and a certain thickness and is made of metal, namely, the sealing ring has an inner circle and an outer circle, after the sealing ring 8 is sleeved on the valve seat, the surface (namely a sealing surface) of the outer circle of the sealing ring 8, which is far away from the valve seat, is a processing surface, the sealing surface is a circular ring (equivalent to a hollow circular ring) with a central hole, in the processing process, the valve is fixedly arranged on a machine tool, and the structure of the valve is shown in figures 7 and 8.

The invention provides a grinding device for a sealing ring on an inner valve seat of a valve, which is used for processing the sealing surface of a sealing ring 8 in the valve, and the specific structure is shown in figure 1, which comprises a first driving mechanism, a base 1, an inclined guide rail 2 arranged on the base 1 and a driving connecting mechanism 3 arranged on the inclined guide rail 2, a valve 4 is arranged on one side of the driving connecting mechanism 3, the valve is provided with an opening, the inclined guide rail 2 is obliquely arranged, an included angle is kept between the inclined guide rail and the horizontal plane, the length direction (extending direction) of the inclined guide rail 2 is parallel to the central line of the sealing ring 8, and the included angle is kept between the central line of the sealing ring 8 on the valve and the horizontal plane.

Under first actuating mechanism's drive, drive coupling mechanism 3 removes along the length direction of inclined guide rail 2 and is close to or keeps away from the valve, and rotatory processing cutter 5 gets into and makes linear motion in waiting to process valve 4's opening when removing to be close to the valve, because of inclined guide rail 2 sets up for the slope, drive coupling mechanism 3's moving direction and inclined guide rail 2's length direction parallel arrangement, also keep the contained angle between drive coupling mechanism 3's moving direction and the horizontal plane. The first driving mechanism is preferably a motor, a drag chain is arranged on one side of the driving connecting mechanism 3, and the motor drives the drag chain to move so as to drive the driving connecting mechanism 3 to move.

The specific structure of the drive connecting mechanism 3 is as follows: referring to fig. 1 and 2, the driving connection mechanism 3 includes a second driving mechanism 31, a spindle box 32, and a facing head 33 disposed on one side of the spindle box 32 close to the valve 4, a rotation shaft fixedly connected to the facing head 33 is disposed in the spindle box 32, the second driving mechanism 31 is preferably a servo motor, the facing head 33 is close to the valve 4, and a processing tool 5 is disposed at one end of the facing head 33 close to the valve.

The specific structure of the facing head 33 is as follows: referring to fig. 5 to 7, the facing wheel 33 includes a housing 335, a slider 331 disposed outside the housing 335, and a moving rod 333 and a third driving mechanism disposed inside the housing 335, the slider 331 and the moving rod 333 being disposed in parallel, the third driving mechanism being preferably a motor, and a vertical cross-section of the housing 335 facing the processing tool being preferably a kidney-round hole.

The slider 331 can move in the following manner: referring to fig. 4 and 5, the moving rod is a screw rod (e.g., a ball screw rod, which can convert a rotary motion into a linear motion), the screw rod is externally threaded, the facing head 33 further includes a nut 334 sleeved on the moving rod 333, a connecting plate 332 for connecting the nut 334 with the slider 331, and a belt pulley 336 connected with the moving rod 333, one side of the moving rod away from the belt pulley 336 is provided with a bearing seat 337 for fixing the moving rod, under the driving of the third driving mechanism, the belt pulley 336 rotates to drive the moving rod 333 to rotate around its axis direction, the moving rod 333 rotates to drive the nut 334 to move along the length direction of the moving rod 333, and further drive the slider 331 to move along its length direction (the length direction of the slider is the length direction of the slider, the length direction of the slider is parallel to the length direction of the moving rod, as shown in fig. 1, the vertical section of the housing 335 facing the processing tool and the vertical section away from the processing tool are, one side of the shell is provided with a long shaft and a short shaft, at the moment, the length direction of the sliding part is parallel to the long shaft direction, the center of the sliding part moves away from the center of the shell 335 in the movement of the sliding part, and the knife grinder of the rotary processing tool can be further driven to move along the circumferential direction of the sealing surface of the sealing ring (circular motion, namely circular direction, by taking the center of the sealing surface of the sealing ring as the center of a circle).

The movement of the machining tool in the circumferential direction along the sealing surface of the sealing ring is further explained as follows: when the rotating shaft drives the facing head to rotate, and the third driving mechanism drives the sliding part 331 to move along the length direction (X-axis direction, left-right direction, i.e. horizontal direction) of the sliding part 331, the machining tool is equivalently driven to move along the circumferential direction of the sealing ring (the center of the sealing ring is used as the center of the circle, and a straight line extending from the center of the circle is used as the diameter).

Preferably, the side of whetting a knife and being close to the cutter arbor is circular, and its diameter more than or equal to the sealed face of sealing washer excircle radius and interior radius difference for the slide moves to a position earlier during the grinding (the one side of whetting a knife and being close to the cutter arbor can cover along circumference partly on the sealed face of sealing washer, whets a knife promptly and is close to the one center of cutter arbor and to the sealed face of sealing washer central separation distance be greater than the sealed face of sealing washer interior radius, and in the preface course of working, the slide need not to remove again, only needs the axis of rotation rotate in order to drive the facing head rotation, and then drive processing cutter 5 rotatory to and electric main shaft drive cutter arbor 52 and whe.

The diameters of the sealing rings 8 in different valves are different, the existing machining tool and the valve sealing ring can only machine a valve seat with one specification in the coaxial machining process.

The specific structure of the machining tool 5 is as follows: referring to fig. 1 and 5, a processing tool 5 is disposed at one end of the facing wheel 33 close to the valve, the processing tool 5 includes an electric spindle 51 fixedly connected to the slider 331 through a fixing seat, a tool bar 52 connected to the electric spindle 51, a tool holder 54 connected to the tool bar 52, and a knife 53 disposed on the tool holder 54, the knife 53 is disposed at one end of the tool bar 52 far from the facing wheel 33, and the electric spindle is preferably disposed at a central portion of the housing 335. The electric spindle rotates after being electrified so as to drive the cutter bar 52 and the knife blade 53 to rotate around the axis direction of the electric spindle. If the electric spindle is provided with a motor, an output shaft of the motor is connected with the electric spindle, and the motor drives the electric spindle to rotate so as to drive the cutter bar 52 and the knife 53 to rotate.

Preferably, the machining tool is detachably disposed on the sliding member 331 of the facing head 33, and the mill knife 53 is detachably disposed on the tool bar, so that the required machining tool or mill knife can be replaced according to different machining requirements of the workpiece to be machined. The surface (ring surface) of the knife blade 53 close to the knife bar 52 is of a frosted structure (grinding wheel sheet), the knife blade 53 is of a disc structure, and the machining of the sealing surface of the sealing ring by the knife blade 53 belongs to surface machining.

The grinding wheel processing needs very high linear velocity, only rotates by the facing head to drive the knife sharpening to rotate, the sealing surface of the sealing ring 8 of the workpiece cannot be processed, and in the processing, the electric spindle is further needed to drive the knife sharpening 53 to rotate around the axis direction of the electric spindle, so that the processing intensity is ensured.

In one embodiment provided by the invention, the two inclined guide rails 2 are arranged, the two driving connecting mechanisms 3 are arranged, the two inclined guide rails 2 are oppositely arranged, the valve is arranged between the two inclined guide rails 2, and the two driving connecting mechanisms 3 are arranged due to the two oppositely arranged sealing rings arranged in the valve, so that the sealing surfaces of the two sealing rings on the valve can be simultaneously processed respectively, and the production efficiency is greatly improved.

The grinding equipment for the upper sealing ring of the valve seat further comprises a transmission case 7 arranged on one side, away from the facing head 33, of the driving connection mechanism 3, a transmission mechanism connected with the second driving mechanism 31 is arranged in the transmission case, the transmission mechanism is a gear set formed by a plurality of matched gears, under the driving of the second driving mechanism 31, the transmission mechanism drives the rotating shaft to rotate so as to drive the facing head 33 to rotate, and then the machining tool 5 is driven to rotate. The second driving mechanism 31 is preferably a servo motor, the servo motor provides source power for the whole cutting process, and a gear train of the transmission mechanism adjusts the power provided by the servo motor to the most suitable cutting size and speed (namely, the rotating speed of the knife grinder can be adjusted), so that the cutting force is more stable.

Further, sealing washer grinding equipment still includes the priming device of setting outside drive coupling mechanism, and liquid can be through priming device pouring on the processing cutter, and in the course of working, cutter department temperature can rise, pours the cooling water through the priming device to provide sufficient lubrication and cooling for the sealing face of sealing washer 8 in the course of working.

The grinding equipment for the upper sealing ring of the valve inner valve seat further comprises a tool 6 for placing the valve, and the tool is used for quickly fixing the valve and facilitating placement and unloading of the valve.

The invention provides a valve inner valve seat upper seal ring grinding device which processes a valve inner seal ring sealing surface, wherein the sealing surface of the seal ring is a processing surface:

s1, fixing the valve on one side of a machining cutter of the sealing ring grinding equipment on the valve seat in the valve, namely fixedly mounting the valve on a tool;

s2, before the machining tool enters the valve to be machined, the second driving mechanism is used for driving the facing head to rotate so as to drive the machining tool to rotate, and meanwhile, the electric spindle is used for driving the cutter bar and the cutter grinding to synchronously rotate;

s3, under the drive of the first driving mechanism, the connecting mechanism is driven to move towards the direction close to the valve to be processed, so that the rotating processing cutter enters the opening of the valve to be processed to do linear motion (the moving direction of the grinding equipment and the direction of the grinding equipment entering the valve are indicated by arrows in figure 8), the knife grinder passes through the sealing ring to move to a preset position, then the third driving mechanism is used for driving the moving rod to rotate to drive the processing cutter to move along the length direction of the sliding part until one surface (a frosted surface) of the knife grinder close to the cutter bar is contacted with the sealing surface of the sealing ring (see figures 9 and 10, in the processing process, the spindle box and the gear box do not shift change, the shell keeps rotating, the processing cutter does circular motion along the sealing surface of the sealing ring while rotating, the electric spindle is not coaxial with the sealing surface, and the flat rotary disc is coaxial with the sealing surface), so as to grind the sealing surface of the, during machining, the machining tool can move along the sealing surface of the sealing ring for multiple times (one time represents one circle of movement); the preset position refers to a position where one surface (a frosted surface) of the knife blade close to the knife rod can be contacted with the sealing surface of the sealing ring after the third driving mechanism drives the movable rod to rotate so as to drive the machining cutter to move along the length direction of the sliding part; when the sealing surface becomes thin, the connecting mechanism is driven to retreat along the length direction of the inclined guide rail under the driving of the first driving mechanism, so that one surface (a frosted surface) of the knife grinder close to the knife bar is always in contact with the sealing surface of the sealing ring;

s4, after the machining is finished, a first driving mechanism is used for providing backward driving force, so that the driving connection mechanism integrally moves backward, and the machining tool retreats from the opening of the valve; and simultaneously the sliding piece returns.

Finally, the processed valve is taken away, and a new valve is installed, and the processing is carried out according to the steps S1-S4.

The grinding equipment for the upper sealing ring of the valve inner valve seat has the advantages that the grinding resistance is small, the cutting speed is high, the machining efficiency is greatly improved, and the machining efficiency is improved by 4-6 times compared with a general machining mode; the direction of the linear motion of the driving connecting mechanism is perpendicular to the plane of the knife grinder (namely, the plane formed by the rotation of the knife grinder along the sealing surface), namely, the knife grinder is ensured to do circular motion along the sealing surface of the sealing ring, the knife grinder is prevented from inclining and deviating so as to ensure the processing precision, the knife grinder belongs to surface processing on the sealing surface of the sealing ring, the size of the sealing surface of the sealing ring is accurately corrected, the processed sealing surface is smooth and uniform, and the flatness reaches within four micrometers; the angle error is reduced, the error of the angle (the angle is indicated as a in the figure, a is the included angle between the sealing surface and the central plane of the valve, and the angle is measured by a special measuring tool) reaches within five thousandths, and the processing precision is high; the grinding equipment for the sealing ring on the valve inner valve seat can achieve the matching degree of the flashboard (the flashboard is arranged between the two sealing rings) and the valve body (after the sealing rings are processed in a unified way, the valve body can be called as a standard part, the flashboard can be made into the standard part, and the situation that the size of the valve body of the same model is not unified due to manual processing of the sealing rings and the flashboard matched with the valve body needs to be prepared is avoided); automatic production is realized, and production efficiency is high.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The grinding equipment for the sealing ring on the valve inner valve seat is used for machining the sealing surface of a sealing ring (8) in the valve, and the valve is provided with an opening and is characterized by comprising a first driving mechanism, a base (1), an inclined guide rail (2) arranged on the base (1) and a driving connecting mechanism (3) arranged on the inclined guide rail (2), wherein a valve (4) is arranged on one side of the driving connecting mechanism (3), an included angle is kept between the inclined guide rail (2) and a horizontal plane, and the length direction of the inclined guide rail (2) is parallel to the central line of the sealing ring (8);

the driving connection mechanism (3) comprises a second driving mechanism, a spindle box (32) and a facing head (33) arranged on one side, close to the valve (4), of the spindle box (32), a rotating shaft fixedly connected with the facing head (33) is arranged in the spindle box (32), the facing head (33) comprises a shell (335), a sliding part (331) arranged on the outer side of the shell (335), and a moving rod (333) and a third driving mechanism which are arranged in the shell (335), wherein the sliding part (331) and the moving rod (333) are arranged in parallel and are connected through a connecting plate (332);

a processing cutter (5) fixedly connected with the sliding piece (331) is arranged at one end, close to the valve, of the facing head (33), the processing cutter (5) comprises a cutter holder (54) and a cutter blade (53) arranged on the cutter holder (54), and the cutter blade (53) extends out of the cutter holder (54);

under the drive of the second driving mechanism (31), the rotating shaft rotates to drive the facing head (33) to rotate, and further drive the machining tool (5) to rotate;

under the drive of the first driving mechanism, the rotary machining cutter (5) enters the opening of the valve (4) to be machined to do linear motion until the knife grinder (53) penetrates through the sealing ring;

under the driving of the third driving mechanism, the moving rod (333) rotates to drive the sliding part (331) to move along the length direction of the sliding part, and further drives the rotary machining tool (5) to move along the length direction of the sliding part (331), so that the rotary grinding tool is in contact with the sealing surface of the sealing ring to machine the sealing ring.

2. The grinding device for the sealing ring on the valve seat in the valve according to claim 1, wherein the facing head (33) further comprises a nut (334) sleeved on the moving rod (333) and a belt pulley (336) connected with the moving rod (333), the connecting plate (332) is used for connecting the nut (334) with the sliding part (331), under the driving of the third driving mechanism, the belt pulley (336) rotates to drive the moving rod (333) to rotate, the moving rod (333) rotates to drive the nut (334) to move along the length direction of the moving rod (333), and further the sliding part (331) is driven to move along the length direction of the moving rod (333).

3. The grinding device for the sealing ring on the valve seat in the valve according to claim 1, wherein the machining tool (5) further comprises an electric spindle (51) connected with the sliding member (331) through a fixed seat and a tool bar (52) connected with the electric spindle (51), the mill knife (53) is arranged at one end of the tool bar (52) far away from the facing head (33), and the electric spindle (51) is used for driving the tool bar (52) and the mill knife (53) to rotate synchronously.

4. The grinding device for the sealing ring on the valve seat in the valve according to claim 3, wherein the grinding knife (53) is arranged on one side of the cutter seat (54) close to the cutter rod (52), and the grinding knife (53) is of a frosted structure.

5. An apparatus for grinding a sealing ring on a valve seat in a valve according to claim 1, wherein the inclined rails (2) are provided in two, the driving connecting mechanism (3) is provided in two, the two inclined rails (2) are oppositely arranged, and the valve is arranged between the two inclined rails (2).

6. The grinding device for the sealing ring on the valve inner valve seat is characterized by further comprising a transmission case (7) arranged on one side, away from the facing head (33), of the driving connection mechanism (3), wherein a transmission mechanism connected with a second driving mechanism (31) is arranged in the transmission case (7), and the transmission mechanism drives the rotating shaft to rotate under the driving of the second driving mechanism (31) so as to drive the facing head (33) to rotate and further drive the machining tool (5) to rotate.

7. An apparatus for grinding a seal ring on a valve seat in a valve as claimed in claim 6, wherein said transmission mechanism comprises a plurality of gears engaged with each other.

8. An apparatus for grinding a seal ring on a valve seat in a valve according to claim 3, wherein the machining tool is detachably provided on a slider (331), and the grinding blade (53) is detachably provided on the tool holder (54).

9. The grinding device for the sealing ring on the valve inner seat according to claim 1, further comprising a liquid injection device arranged outside the driving connection mechanism, wherein liquid can be poured on the processing cutter through the liquid injection device.

10. The grinding device for the sealing ring on the valve seat in the valve as claimed in claim 2, wherein a side of the moving rod (333) far away from the pulley (336) is provided with a bearing seat (337) for fixing the moving rod (333).

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