A kind of sealing ring grinding equipment and processing method on valve seat inside valve

Abstract

The present invention discloses a grinding device and a processing method for a sealing ring on a valve seat in a valve. The device includes a first driving mechanism, a base, an inclined guide rail and a driving connection mechanism. The driving connection mechanism includes a second driving mechanism, a spindle box and a flat plate. A rotating shaft is provided in the spindle box. The flat plate includes a housing, a sliding member, a moving rod and a third driving mechanism. The processing tool includes a grinder. Under the drive of the second driving mechanism, the rotating shaft rotates to drive the flat plate to rotate, thereby driving the processing tool to rotate. Under the drive of the first driving mechanism, the processing tool enters the valve opening and moves linearly until the grinder passes through the sealing ring. Under the drive of the third driving mechanism, the moving rod rotates to drive the sliding member to move along its length direction, thereby driving the processing tool to move along the length direction of the sliding member until the grinder contacts the sealing surface of the sealing ring to process it. The grinding device provided by the present invention improves processing efficiency and processing accuracy, and achieves the universal matching of the gate plate and the valve body.

Description

Technical Field

[0001] The invention relates to the field of mechanical manufacturing, and in particular to a grinding device and a processing method for a sealing ring on a valve seat inside a valve. Background Art

[0002] At present, the sealing surface of pipeline gate valves is usually processed by manual grinding. After the sealing ring is welded into the valve body, a homemade grinding disc is manually inserted, and then the worker uses a portable power head to connect the grinding disc to grind the sealing surface. This process can only polish the sealing surface but cannot correct the size of the sealing surface. Therefore, the production qualification rate of this process is extremely low, generally not exceeding 40%, and it requires a high level of proficiency of the operating workers. Summary of the invention

[0003] In order to solve the problems of the prior art, the present invention provides a valve inner valve seat upper sealing ring grinding device and processing method to improve the processing accuracy and improve the production efficiency. The technical solution is as follows:

[0004] On the one hand, the present invention provides a sealing ring grinding device on a valve seat inside a valve, which is used for processing the sealing surface of the sealing ring inside the valve, wherein the valve has an opening, and comprises a first driving mechanism, a base, an inclined guide rail arranged on the base, and a driving connection mechanism arranged on the inclined guide rail, wherein a valve is arranged on one side of the driving connection mechanism, an angle is maintained between the inclined guide rail and a horizontal plane, and the length direction of the inclined guide rail is arranged parallel to the center line of the sealing ring;

[0005] The driving connection mechanism includes a second driving mechanism, a main spindle box and a flat plate arranged on a side of the main spindle box close to the valve, a rotating shaft fixedly connected to the flat plate is arranged in the main spindle box, the flat plate includes a shell, a sliding member arranged outside the shell, a moving rod arranged in the shell, and a third driving mechanism, the sliding member and the moving rod are arranged in parallel and are connected by a connecting plate;

[0006] A machining tool fixedly connected to the sliding member is provided at one end of the flat rotating disk close to the valve, and the machining tool includes a grinding tool;

[0007] Under the drive of the second driving mechanism, the rotating shaft rotates to drive the flat rotating disk to rotate, thereby driving the machining tool to rotate;

[0008] Driven by the first driving mechanism, the rotating machining tool enters the opening of the valve to be machined and moves linearly until the grinding tool passes through the sealing ring;

[0009] Driven by the third driving mechanism, the moving rod rotates to drive the sliding member to move along its length direction, thereby driving the rotating processing tool to move along the length direction of the sliding member, so that the rotating grinding tool contacts the sealing surface of the sealing ring to process it.

[0010] Furthermore, the rotating disk also includes a nut sleeved on the moving rod and a pulley connected to the moving rod, and the connecting plate is used to connect the nut and the sliding member. Under the drive of the third driving mechanism, the rotation of the pulley drives the moving rod to rotate, and the rotation of the moving rod drives the nut to move along the length direction of the moving rod, thereby driving the sliding member to move along its length direction.

[0011] Furthermore, the machining tool also includes an electric spindle connected to the sliding member through a fixed seat and a tool rod connected to the electric spindle, the sharpening tool is arranged at an end of the tool rod away from the flat rotating disk, and the electric spindle is used to drive the tool rod and the sharpening tool to rotate synchronously.

[0012] Furthermore, the sharpening tool is a disc structure, and the surface of the sharpening tool close to the tool rod is a frosted structure.

[0013] Furthermore, the number of the inclined guide rails is two, the number of the drive connection mechanisms is two, the two inclined guide rails are arranged opposite to each other, and the valve is arranged between the two inclined guide rails.

[0014] Furthermore, the sealing ring grinding equipment on the valve seat inside the valve also includes a transmission box arranged on the side of the driving connection mechanism away from the flat rotating disk, and a transmission mechanism connected to the second driving mechanism is arranged in the transmission box. Under the drive of the second driving mechanism, the transmission mechanism drives the rotating shaft to rotate, so as to drive the flat rotating disk to rotate, and then drive the processing tool to rotate.

[0015] Furthermore, the transmission mechanism includes a plurality of gears that cooperate with each other.

[0016] Furthermore, the machining tool can be detachably arranged on the sliding member, and the sharpening tool can be detachably arranged on the tool rod.

[0017] Furthermore, the sealing ring grinding equipment also includes a liquid injection device arranged outside the driving connection mechanism, and the liquid can be poured onto the processing tool through the liquid injection device.

[0018] On the other hand, the present invention also provides a processing method based on the grinding device for the sealing ring on the valve seat inside the valve, wherein the sealing surface of the sealing ring is the processing surface, and the processing method comprises the following steps:

[0019] S1. Fix the valve on the sealing ring grinding equipment on the valve seat inside the valve;

[0020] S2, using the second driving mechanism to drive the flat rotating disk to rotate, thereby driving the processing tool to rotate, and at the same time using the electric spindle to drive the tool rod and the grinding tool to rotate synchronously;

[0021] S3, using the first driving mechanism to drive the rotating machining tool to enter the opening of the valve to be machined to make a linear motion, so that the grinding knife passes through the sealing ring, and then using the third driving mechanism to drive the moving rod to rotate to drive the rotating machining tool to move along the length direction of the sliding member, so that the rotating grinding knife contacts the sealing surface of the sealing ring to grind the sealing surface of the sealing ring;

[0022] S4. After the processing is completed, the first driving mechanism is used to provide a backward driving force to move the driving connection mechanism as a whole backward, so that the processing tool is withdrawn from the opening of the valve.

[0023] The beneficial effects brought by the technical solution provided by the present invention are as follows:

[0024] a. The valve seat seal ring grinding equipment provided by the present invention has a processing efficiency that is 4-6 times higher than that of the general processing method; the angle error is within 0.5%, the flatness is within 4 microns, the processing accuracy is high, and it is two levels higher than the existing processing technology;

[0025] b. The valve seat sealing ring grinding device provided by the present invention can conveniently process valves of various specifications, making the grinding device provided by the present application universal;

[0026] c. Realize automated production, improve production efficiency and reduce labor intensity;

[0027] d. The sealing ring grinding equipment on the valve seat inside the valve provided by the present invention can achieve the level of matching between the gate plate and the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 is a three-dimensional diagram of a sealing ring grinding device on a valve seat in a valve provided by an embodiment of the present invention;

[0030] Figure 2 It is a three-dimensional diagram of a driving connection mechanism of a sealing ring grinding device on a valve seat in a valve provided by an embodiment of the present invention;

[0031] Figure 3 is a top view of a sealing ring grinding device on a valve seat in a valve provided by an embodiment of the present invention;

[0032] Figure 4 It is a side view of a driving connection mechanism of a sealing ring grinding device on a valve seat in a valve provided by an embodiment of the present invention;

[0033] Figure 5 is a cross-sectional view of a driving connection mechanism of a sealing ring grinding device on a valve seat in a valve provided by an embodiment of the present invention;

[0034] Figure 6 It is a cross-sectional view in the main view direction of the driving connection mechanism of the sealing ring grinding device on the valve seat in the valve provided by the embodiment of the present invention;

[0035] Figure 7 is a cross-sectional view of a valve provided by an embodiment of the present invention;

[0036] Figure 8 is a three-dimensional diagram showing a sealing ring of a valve provided by an embodiment of the present invention;

[0037] Fig. 9 It is a cross-sectional view of the grinding knife of the sealing ring grinding device on the valve seat inside the valve provided by the embodiment of the present invention and the sealing surface of the sealing ring;

[0038] Fig.10 The invention provides a valve inner valve seat sealing ring grinding device. Fig. 9 An enlarged view of the middle grinder and the sealing surface of the seal ring.

[0039] Among them, the figure marks include: 1-base, 2-inclined guide rail, 3-drive connecting mechanism, 31-second drive mechanism, 32-spindle box, 33-turntable, 331-sliding member, 332-connecting plate, 333-moving rod, 334-nut, 335-housing, 336-pulley, 337-bearing seat, 4-valve, 5-machining tool, 51-electric spindle, 52-tool rod, 53-grinding tool, 54-tool seat, 6-tooling, 7-transmission mechanism, 8-sealing ring, 81-sealing surface. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0042] The processing object of the sealing ring grinding equipment on the valve seat provided by the present invention is a valve with an opening. The valve has an opening. A sealing ring 8 made of a metal material is arranged in the valve. The sealing ring 8 is a disc structure with a hollow structure and a certain thickness. It is made of a metal material, that is, it has an inner circle and an outer circle. After the sealing ring 8 is sleeved on the valve seat, the outer ring surface of the sealing ring 8 away from the valve seat (that is, the sealing surface) is the processing surface. The sealing surface is a ring with a center hole (equivalent to a hollow ring). During the processing, the valve is fixedly arranged on the machine tool. The structure of the valve is shown in FIG. Figure 7 and 8 .

[0043] The present invention provides a valve seat inner seal ring grinding device for machining the sealing surface of the valve inner seal ring 8. Figure 1 It includes a first driving mechanism, a base 1, an inclined guide rail 2 arranged on the base 1 and a driving connection mechanism 3 arranged on the inclined guide rail 2. A valve 4 is arranged on one side of the driving connection mechanism 3, and the valve has an opening. The inclined guide rail 2 is inclined to maintain an angle with the horizontal plane. The length direction (extension direction) of the inclined guide rail 2 is parallel to the center line of the sealing ring 8. Because the center line of the sealing ring 8 on the valve maintains an angle with the horizontal plane, a special inclined guide rail is used to make the feeding direction of the sealing ring grinding equipment on the valve seat inside the valve parallel to the center line of the sealing ring 8 inside the valve, so as to improve the processing accuracy.

[0044] Driven by the first driving mechanism, the driving connection mechanism 3 moves along the length direction of the inclined guide rail 2 to approach or move away from the valve. When moving closer to the valve, the rotating processing tool 5 enters the opening of the valve 4 to be processed and moves linearly. Since the inclined guide rail 2 is inclined, the moving direction of the driving connection mechanism 3 is parallel to the length direction of the inclined guide rail 2, and the moving direction of the driving connection mechanism 3 also maintains an angle with the horizontal plane. The first driving mechanism is preferably a motor, and a drag chain is arranged on one side of the driving connection mechanism 3. The motor drives the drag chain to move, so as to drive the driving connection mechanism 3 to move.

[0045] The specific structure of the driving connection mechanism 3 is as follows: Figure 1 and Figure 2 The driving connection mechanism 3 includes a second driving mechanism 31, a spindle box 32 and a flat disc 33 arranged on the side of the spindle box 32 close to the valve 4. A rotating shaft fixedly connected to the flat disc 33 is provided in the spindle box 32. The second driving mechanism 31 is preferably a servo motor. The flat disc 33 is close to the valve 4. A machining tool 5 is provided on the end of the flat disc 33 close to the valve.

[0046] The specific structure of the flat rotating disk 33 is as follows: Figures 5 to 7 The flat rotating disk 33 includes a shell 335, a sliding member 331 arranged on the outside of the shell 335, and a moving rod 333 and a third driving mechanism arranged in the shell 335. The sliding member 331 and the moving rod 333 are arranged in parallel. The third driving mechanism is preferably a motor. The vertical section of the shell 335 facing the processing tool is preferably a waist-shaped circular hole.

[0047] The specific implementation of the sliding member 331 being able to move is as follows: Figure 4 and Figure 5 The moving rod is a screw rod (such as a ball screw, which can convert rotary motion into linear motion), and the screw rod has threads on the outside. The flat rotating disk 33 also includes a nut 334 sleeved on the moving rod 333, a connecting plate 332 for connecting the nut 334 and the sliding member 331, and a pulley 336 connected to the moving rod 333. A bearing seat 337 for fixing the moving rod is provided on the side of the moving rod away from the pulley 336. Under the drive of the third driving mechanism, the pulley 336 rotates to drive the moving rod 333 to rotate around its own axis direction. The moving rod 333 rotates to drive the nut 334 to move along the length direction of the moving rod 333, and then drives the sliding member 331 along its length direction (its length direction is the length direction of the sliding member, and the length direction of the sliding member is parallel to the length direction of the moving rod, such as Figure 1As shown, the vertical section of the shell 335 facing the processing tool and the vertical section away from the processing tool are preferably in the shape of a waisted circular hole, and one side of the shell has a major axis and a minor axis. At this time, the length direction of the sliding member is parallel to the major axis direction. When the sliding member moves, the center of the sliding member moves away from the center of the shell 335, and can further drive the grinding knife of the rotating processing tool to move along the circumference of the sealing surface of the sealing ring (circular motion with the center of the sealing surface of the sealing ring as the center of the circle, that is, annular motion).

[0048] Further explanation of the circumferential movement of the processing tool along the sealing surface of the sealing ring is as follows: when the rotating shaft drives the flat rotating disk to rotate, and at the same time the third driving mechanism drives the sliding member 331 to move along its length direction (X-axis direction, left and right direction, i.e. horizontal direction), it is equivalent to driving the processing tool along the circumferential direction of the sealing ring (with the center of the sealing ring as the center of the circle and the straight line extending from the center of the circle as the diameter). During the processing, the processing tool itself rotates and moves along its length direction driven by the sliding member 331, which is equivalent to the processing tool moving along the circumferential direction of the sealing surface of the sealing ring, so that the side of the sharpening tool close to the tool rod can contact the sealing surface of the sealing ring and move along its sealing surface for a full circle (i.e., it can revolve).

[0049] Preferably, the side of the grinder close to the tool rod is circular, and its diameter is greater than or equal to the difference between the outer radius and the inner radius of the sealing surface of the sealing ring, so that when grinding, the slide plate first moves to a position (the side of the grinder close to the tool rod can cover a part of the upper circumferential edge of the sealing surface of the sealing ring, that is, the distance from the center of the side of the grinder close to the tool rod to the center of the sealing ring is greater than the inner radius of the sealing surface of the sealing ring). In the subsequent processing, the slide plate does not need to be moved again, and the rotating shaft only needs to rotate to drive the flat rotating disk to rotate, and then drive the processing tool 5 to rotate, and the electric spindle drives the tool rod 52 and the grinder 53 to rotate synchronously. The operation is simple and the processing efficiency is high.

[0050] The diameters of the sealing rings 8 in different valves are different. The existing processing tools are coaxial with the valve sealing rings and can only process valve seats of one specification. In the processing device provided by the present invention, the grinding tool processes the sealing surface of the sealing ring in an eccentric manner. By adjusting the distance that the sliding part moves along its length direction, the grinding tool of the processing tool can contact the sealing surface of the sealing ring, thereby facilitating the processing of valves of various specifications, making the grinding equipment provided by the present application universal.

[0051] The specific structure of the machining tool 5 is as follows: Figure 1 and Figure 5The end of the flat rotating disk 33 close to the valve is provided with a machining tool 5, and the machining tool 5 includes an electric spindle 51 fixedly connected to the sliding member 331 through a fixed seat, a tool rod 52 connected to the electric spindle 51, a tool seat 54 connected to the tool rod 52, and a sharpening tool 53 arranged on the tool seat 54, and the sharpening tool 53 is arranged at the end of the tool rod 52 away from the flat rotating disk 33. The electric spindle is preferably arranged at the center of the housing 335. After the electric spindle is powered on, it rotates itself to drive the tool rod 52 and the sharpening tool 53 to rotate around its own axis direction respectively. If a motor is provided on the electric spindle, the output shaft of the motor is connected to the electric spindle, and the motor drives the electric spindle to rotate, driving the tool rod 52 and the sharpening tool 53 to rotate.

[0052] Preferably, the machining tool can be detachably mounted on the sliding member 331 of the flat rotating disk 33, and the sharpener 53 can be detachably mounted on the tool bar, so that the required machining tool or sharpener can be replaced according to different machining requirements of the workpiece to be machined. The surface (circular surface) of the sharpener 53 close to the tool bar 52 is a frosted structure (grinding wheel), and the sharpener 53 is a disc structure. The processing of the sealing surface of the sealing ring by the sharpener 53 belongs to surface processing.

[0053] Grinding wheel processing requires a very high linear speed. The sealing surface of the sealing ring 8 of the workpiece cannot be processed by only rotating the flat disk to drive the grinding cutter to rotate. During processing, the electric spindle is also required to drive the grinding cutter 53 to rotate around its own axis to ensure processing strength.

[0054] In an embodiment provided by the present invention, the number of inclined guide rails 2 is two, the number of drive connection mechanisms 3 is two, the two inclined guide rails 2 are relatively arranged, and the valve is arranged between the two inclined guide rails 2. Since two relatively arranged sealing rings are arranged in the valve, two drive connection mechanisms 3 are arranged, and the sealing surfaces of the two sealing rings on the valve can be processed simultaneously, thereby greatly improving the production efficiency.

[0055] The sealing ring grinding device on the valve seat in the valve also includes a transmission box 7 arranged on the side of the driving connection mechanism 3 away from the flat rotating disk 33. The transmission box is provided with a transmission mechanism connected to the second driving mechanism 31. The transmission mechanism is a gear set composed of a plurality of matching gears. Under the drive of the second driving mechanism 31, the transmission mechanism drives the rotating shaft to rotate, so as to drive the flat rotating disk 33 to rotate, and then drives the processing tool 5 to rotate. The second driving mechanism 31 is preferably a servo motor, which provides source power for the entire cutting process. The gear train of the transmission mechanism adjusts the power provided by the servo motor to the most suitable size and speed for cutting (that is, the rotation speed of the grinding tool can be adjusted), so that the cutting force is more stable.

[0056] Furthermore, the sealing ring grinding equipment also includes a liquid injection device arranged outside the driving connection mechanism, and the liquid can be poured onto the processing tool through the liquid injection device. During the processing, the temperature at the tool will increase, and cooling water is poured through the liquid injection device to provide sufficient lubrication and cooling for the sealing surface of the sealing ring 8 during the processing.

[0057] The valve inner valve seat upper sealing ring grinding device also includes a tool 6 for placing the valve, which is used to quickly fix the valve and facilitate the placement and unloading of the valve.

[0058] The present invention also provides a method for machining the sealing surface of the sealing ring inside the valve by using the sealing ring grinding device on the valve seat inside the valve, wherein the sealing surface of the sealing ring is a machining surface, and the method comprises the following steps:

[0059] S1. Fix the valve on one side of the machining tool of the sealing ring grinding equipment on the valve seat inside the valve, that is, fix the valve on the tooling;

[0060] S2. Before the machining tool enters the valve to be machined, the second driving mechanism is used to drive the flat rotating disk to rotate, thereby driving the machining tool to rotate, and at the same time, the electric spindle is used to drive the tool rod and the grinding tool to rotate synchronously;

[0061] S3. Under the drive of the first driving mechanism, the driving connecting mechanism moves toward the direction of the valve to be processed, so that the rotating processing tool enters the opening of the valve to be processed and moves linearly (the moving direction of the grinding device and the direction of entering the valve are shown in FIG. Figure 8 The grinding tool moves through the sealing ring to a preset position, and then the third driving mechanism drives the moving rod to rotate to drive the processing tool to move along the length direction of the sliding member until the side of the grinding tool close to the tool rod (grinding surface) contacts the sealing surface of the sealing ring (see Fig. 9 and Fig.10 During this processing, the spindle box and the gear box will not change in displacement, the housing keeps rotating, and the processing tool makes a circular motion along the sealing surface of the sealing ring while rotating. The electric spindle and the sealing surface are not coaxial, and the flat rotating disk and the sealing surface are coaxial) to grind the sealing surface of the sealing ring (the surface of the grinding tool close to the tool rod is set parallel to the sealing surface). During the processing, the processing tool can move along the sealing surface of the sealing ring for many times (one time represents one circle); the preset position refers to the position where the side of the grinding tool close to the tool rod (ground surface) can contact the sealing surface of the sealing ring after the third driving mechanism drives the moving rod to rotate to drive the processing tool to move along the length direction of the sliding part; when the sealing surface becomes thinner, under the drive of the first driving mechanism, the driving connection mechanism retreats along the length direction of the inclined guide rail, so that the side of the grinding tool close to the tool rod (ground surface) always keeps in contact with the sealing surface of the sealing ring;

[0062] S4. After the processing is completed, the first driving mechanism is used to provide a backward driving force to move the driving connection mechanism backward as a whole, so that the processing tool is withdrawn from the opening of the valve; and the sliding member returns to its original position at the same time.

[0063] Finally, the processed valve is removed, and a new valve is installed, and the processing is performed according to the above steps S1-S4.

[0064] The sealing ring grinding device on the valve seat inside the valve provided by the present invention has small grinding resistance, fast cutting speed, greatly improved processing efficiency, and the processing efficiency is improved by 4-6 times compared with the general processing method; the direction of the linear motion of the driving connection mechanism is perpendicular to the plane where the grinding knife is located (that is, the plane formed by the rotation of the grinding knife along the sealing surface), that is, it is ensured that the grinding knife makes a circular motion along the sealing surface of the sealing ring, and the grinding knife does not tilt or deviate, so as to ensure the processing accuracy, and the processing of the sealing surface of the sealing ring by the grinding knife belongs to surface processing, and the sealing surface size of the sealing ring is accurately corrected, and the processed sealing surface is smooth and uniform, and the flatness reaches within four microns; the angle error is reduced, and the angle (the angle is indicated by a in the figure) is 0.04mm. , a is the angle between the sealing surface and the center surface of the valve, and the angle is measured by a special measuring tool) the error is within 0.5%, and the processing accuracy is high; the sealing ring grinding equipment on the valve seat provided by the present invention can achieve the degree of universal matching of the gate plate (the gate plate is placed between the two sealing rings) and the valve body (because the sealing rings are processed uniformly, the valve body can be called a standard part, and the gate plate can be made into a standard part, avoiding the same model of valve body due to manual processing of the sealing ring resulting in inconsistent sizes and the need to prepare a matching gate plate), that is, due to the high processing accuracy, the gate plate only needs to be made of one specification, and the adaptability is extremely high. The traditional process can only achieve one-to-one matching between the valve body and the gate; it realizes automated production and has high production efficiency.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve inner valve seat sealing ring grinding device, used for processing the sealing surface of the valve inner sealing ring (8), wherein the valve has an opening, characterized in that: The invention comprises a first driving mechanism, a base (1), an inclined guide rail (2) arranged on the base (1), and a driving connection mechanism (3) arranged on the inclined guide rail (2), a valve (4) being arranged on one side of the driving connection mechanism (3), the inclined guide rail (2) maintaining an angle with a horizontal plane, and the length direction of the inclined guide rail (2) being arranged parallel to the center line of a sealing ring (8); The driving connection mechanism (3) comprises a second driving mechanism, a main spindle box (32) and a flat rotating disk (33) arranged on a side of the main spindle box (32) close to the valve (4); a rotating shaft fixedly connected to the flat rotating disk (33) is arranged in the main spindle box (32); the flat rotating disk (33) comprises a shell (335), a sliding member (331) arranged outside the shell (335), a moving rod (333) arranged in the shell (335) and a third driving mechanism; the sliding member (331) and the moving rod (333) are arranged in parallel and are connected via a connecting plate (332); A machining tool (5) fixedly connected to the sliding member (331) is disposed at one end of the flat rotating disk (33) close to the valve, the machining tool (5) comprising a tool holder (54) and a sharpening tool (53) disposed on the tool holder (54), the sharpening tool (53) protruding out of the tool holder (54); Under the drive of the second driving mechanism (31), the rotating shaft rotates to drive the flat rotating disk (33) to rotate, thereby driving the processing tool (5) to rotate; Driven by the first driving mechanism, the rotating machining tool (5) enters the opening of the valve (4) to be machined and moves linearly until the grinding tool (53) passes through the sealing ring; Under the drive of the third driving mechanism, the moving rod (333) rotates to drive the sliding member (331) to move along its length direction, thereby driving the rotating processing tool (5) to move along the length direction of the sliding member (331), so that the rotating grinding tool contacts the sealing surface of the sealing ring to process it; The flat rotating disk (33) further comprises a nut (334) sleeved on the moving rod (333) and a pulley (336) connected to the moving rod (333); the connecting plate (332) is used to connect the nut (334) and the sliding member (331); under the drive of the third driving mechanism, the pulley (336) rotates to drive the moving rod (333) to rotate, and the moving rod (333) rotates to drive the nut (334) to move along the length direction of the moving rod (333), thereby driving the sliding member (331) to move along its length direction; the inclined guide rails (2) are arranged in two, the driving connection mechanism (3) is arranged in two, the two inclined guide rails (2) are arranged opposite to each other, and the valve is arranged between the two inclined guide rails (2).

2. The valve seat seal ring grinding device according to claim 1, characterized in that: The machining tool (5) further comprises an electric spindle (51) connected to the sliding member (331) via a fixed seat and a tool rod (52) connected to the electric spindle (51); the sharpening tool (53) is arranged at one end of the tool rod (52) away from the flat rotating disk (33); and the electric spindle (51) is used to drive the tool rod (52) and the sharpening tool (53) to rotate synchronously.

3. The valve seat seal ring grinding device according to claim 2, characterized in that: The knife grinder (53) is arranged on a side of the knife seat (54) close to the knife rod (52), and the knife grinder (53) is a frosted structure.

4. The valve seat inner seal ring grinding device according to claim 1, characterized in that: The sealing ring grinding device on the valve seat inside the valve also includes a transmission box (7) arranged on a side of the driving connection mechanism (3) away from the flat rotating disk (33), and a transmission mechanism connected to the second driving mechanism (31) is arranged in the transmission box (7). Under the drive of the second driving mechanism (31), the transmission mechanism drives the rotating shaft to rotate, thereby driving the flat rotating disk (33) to rotate, and further driving the processing tool (5) to rotate.

5. The valve seat seal ring grinding device according to claim 4, characterized in that: The transmission mechanism includes a plurality of gears that cooperate with each other.

6. The valve seat seal ring grinding device according to claim 2, characterized in that: The machining tool is detachably arranged on the slide (331), and the sharpening tool (53) is detachably arranged on the tool seat (54).

7. The valve seat inner seal ring grinding device according to claim 1, characterized in that: The sealing ring grinding device also includes a liquid injection device arranged outside the driving connection mechanism, and liquid can be poured onto the processing tool through the liquid injection device.

8. A method for machining a sealing ring on a valve seat according to any one of claims 1 to 7, wherein the sealing surface of the sealing ring is a machining surface, characterized in that: The following steps are involved: S1. Fix the valve on the sealing ring grinding equipment on the valve seat inside the valve; S2, using the second driving mechanism to drive the flat rotating disk to rotate, thereby driving the processing tool to rotate, and at the same time using the electric spindle to drive the tool rod and the grinding tool to rotate synchronously; S3, using the first driving mechanism to drive the rotating machining tool to enter the opening of the valve to be machined to make a linear motion, so that the grinding knife passes through the sealing ring, and then using the third driving mechanism to drive the moving rod to rotate to drive the rotating machining tool to move along the length direction of the sliding member, so that the rotating grinding knife contacts the sealing surface of the sealing ring to machine it; S4. After the processing is completed, the first driving mechanism is used to provide a backward driving force to move the driving connection mechanism as a whole backward, so that the processing tool is withdrawn from the opening of the valve.

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