A valve body polishing device for a precision fluid valve

Abstract

The present invention discloses a valve body polishing device for a precision fluid valve, comprising a base, a fixing frame integrally formed in the middle of the base, pushing components are arranged at both ends of the inner side of the base, a valve core fixing device is arranged between the two pushing components, and the valve core is driven to translate through the telescopic cooperation of the two pushing components, and the valve core is continuously moved and polished through a columnar shell until it is polished to the outermost corner, and the pushing component of the corner has been withdrawn, thereby realizing the purpose of grinding the valve core of the ball valve with a traditional grinding disc without dead angles as a whole, and grinding can be performed regardless of size and specification, which not only solves the problem of traditional manual grinding, but also solves the problem that the existing customized arc-shaped grinding parts cannot solve the problem of grinding of various specifications.

Description

Technical Field

[0001] The invention belongs to the technical field of valve body polishing, and in particular relates to a valve body polishing device for a precision fluid valve. Background Art

[0002] The closing part of the ball valve is a sphere, which rotates around the center line of the valve body to open and close. The ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium. It only needs to rotate 90 degrees and a very small torque to close tightly. The ball valve is most suitable for use as a switch and cut-off valve. The inner wall of the ball valve body is spherical. After the inner wall is processed, burrs will be generated, which is not conducive to the rotation of the valve core and will affect the sealing of the ball valve. Therefore, the inner wall of the ball valve body needs to be polished during the processing;

[0003] Traditional ball valve cores are mostly spherical, so they are mostly polished manually or with customized arc-shaped polished parts. Manual polishing now wastes manpower and material resources and no longer meets the current mass production requirements. Customized arc-shaped polished parts have two disadvantages. One is that although they can be automatically polished, they cannot adapt to valve cores of various specifications, which requires customized arc-shaped polished parts of various specifications. The other is that since there is a water hole in the middle of the ball valve core, the water hole position is mostly used to fix the valve core and polish the outer surface during the polishing process. This results in the inability of standard arc-shaped polished parts to polish the corners of the water hole well, resulting in burrs and other disadvantages. Summary of the invention

[0004] The object of the present invention is to provide a valve body polishing device for a precision fluid valve to solve the above-mentioned problems.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a valve body polishing device for a precision fluid valve, comprising a base, a fixing frame integrally formed in the middle of the base, a pushing assembly at both ends of the inner side of the base, a valve core fixing device arranged between the two pushing assemblies, and the valve core is driven to translate by the telescopic cooperation of the two pushing assemblies, and further comprising:

[0006] A grinding component and a detection component are respectively arranged on the inner top of the fixing frame and the top of the base, and both the grinding component and the detection component act on the surface of the valve core;

[0007] The grinding assembly includes a telescopic rod 1 fixedly connected to the top of the fixed frame, a grinding disc with a motor is hinged at the bottom of the telescopic rod 1, and the grinding disc with the motor is tangent to the valve core. The difference between the detection assembly and the grinding assembly is that the telescopic rod 1 on the detection assembly is hinged to the detection plate, and the telescopic rod 1 on the detection plate is provided with a spring 1 inside to push the telescopic rod 1 to extend, and the detection plate is in contact with and tangent to the valve core;

[0008] One side of the two telescopic rods on the grinding component and the detection component is fixedly connected to an extension rod, and the two extension rods extend out of the fixed frame, and one end of the two extension rods extending out of the fixed frame is fixedly connected to an L-shaped plate, and one end of the two L-shaped plates is fixedly connected to a rack, a gear is meshed between the two racks, and the gear is fixed to the outside of the fixed frame through a fixed shaft connected by an internal bearing, and the outside of the two racks are fixed with a limit block and fixed to the outside of the fixed frame through the limit block, and the fixed frame is provided with two sliding grooves for the extension rod to move up and down;

[0009] There are two extension rods 2, one of which is fixed on the outer side of the grinding disc shaft of the built-in motor and connected through a bearing and can drive the grinding disc of the built-in motor to rotate; the other extension rod 2 is fixed on the detection plate, one end of the two extension rods 2 extends to the inner wall of the fixed frame and a transmission component is arranged between the two extension rods 2 to drive the grinding disc of the built-in motor to rotate at the same angle relative to the detection plate when the detection plate rotates.

[0010] Preferably, the transmission assembly comprises two relatively meshing assemblies in transmission connection;

[0011] The relative meshing assembly includes two pulleys 2 which are movably connected to the inner wall of the fixing frame and fixed to one end of the extension rod 2 through a bearing, a telescopic rod 2 fixed to the inner wall of the fixing frame is provided on one side of the two pulleys 2, one end of the telescopic rod 2 is fixedly connected to a pulley 1, a synchronous belt 3 is provided on the outer side of the two pulleys 2 and a pulley 1, two adjacent pulleys 2 on the two relative meshing assemblies are fixedly connected to a gear 3 and the two relative meshing assemblies are connected through the gear 3, so that the rotation of the detection plate drives the grinding disc of the motor to rotate through the transmission of the two relative meshing assemblies.

[0012] Preferably, the valve core fixing device comprises a columnar housing disposed between two pushing components, and a plurality of fixing components are arranged in an annular array on the outer side of the columnar housing;

[0013] The fixing assembly includes a threaded rod movably connected to the columnar housing through a bearing, a nut is threadedly connected to the threaded rod, an expansion rod 1 is hinged on the nut, an expansion rod 2 is hinged on one side of the expansion rod 1, one end of the expansion rod 2 is hinged to the outer wall of the columnar housing, and the expansion rod 1 and the expansion rod 2 can form an outwardly expanding triangle by driving the nut to move through the rotation of the threaded rod, and the internal through hole of the valve core is fixed by using the outwardly expanding triangle;

[0014] One end of the multiple threaded rods extends out of the outside of the columnar shell and a synchronous belt is sleeved on the outside of the multiple threaded rods. A motor is also embedded on the inside of one end of the columnar shell and the motor drives one of the threaded rods to rotate, thereby driving multiple threaded rods to rotate synchronously.

[0015] Preferably, the two pushing components are arranged on both sides of the cylindrical shell and can extend into the interior of the cylindrical shell and the two pushing components are arranged in a cross shape, and the pushing components include an electric push rod and a rotating clamping piece with a torsion spring arranged on both sides of one end of the electric push rod, and a limit is generated between the rotating clamping piece with the torsion spring and the cylindrical shell.

[0016] Preferably, through grooves for the electric push rod to extend into are provided on both sides of the cylindrical shell, and push plates are provided inside the through grooves, two springs are fixedly connected between the push plate and the inner wall of the through groove, and a touch switch for controlling the two electric push rods is provided on the push plate, both sides of the two through grooves are movably connected to limiting parts through the central axis, and the limiting parts are provided with limiting notches for rotationally limiting the inner wall of the cylindrical shell, a second gear is processed on the outer side of the bottom of the central axis, two moving rods are symmetrically arranged on the outer side of the push plate, and a section of gear teeth is processed on the moving rod, one end of one of the moving rods extends to the opposite through groove and is meshed with the second gear through the gear teeth, and the rotating clamping part with torsion spring cooperates with the limiting part.

[0017] Preferably, the two pushing components both penetrate the base through bearings and one end of the base where one of the pushing components penetrates is fixedly connected to motor 1, a synchronous shaft is provided on the fixed frame, and a pulley is fixedly connected to the outer side of the other pushing component, and a synchronous belt 2 is sleeved between the transmission shaft of motor 1 and the synchronous shaft and between the pulley on the other pushing component and the synchronous shaft, thereby realizing synchronous rotation between the two pushing components.

[0018] The technical effects and advantages of the present invention are as follows: 1. The valve core is pushed to translate inside the fixed frame by energizing the pushing component until the valve core translates to contact with the detection plate and the grinding disc with the built-in motor, and the motor on the grinding disc with the built-in motor is started to grind the valve core. The detection plate is rotated to the initial state angle shown in the figure by the staff in advance. At the same time, only one pushing component is currently pushing, and the other pushing component is still at a distance from the valve core. At this time, the grinding disc with the built-in motor can move with the detection plate. Fig. 9The position of the initial state, and the edge of the valve core is polished at this position, and then the valve core continues to translate, at this time, the telescopic rod under the detection plate is used to cooperate with the translation of the valve core to shrink, and at the same time, another rack is used to drive the telescopic rod fixed on the polishing disc of the self-contained motor to shrink, so that the polishing disc of the self-contained motor moves with the movement of the detection plate, and the polishing position of the polishing disc of the self-contained motor can be adjusted by detecting the position of the valve core surface with the detection plate, so that the polishing disc of the self-contained motor always polishes the outer surface of the valve core;

[0019] Then another pushing component starts to enter another through slot inside the cylindrical shell until it is fully inserted, during which the elastic contraction structure of the rotating engaging member with a torsion spring is used to break through the limit of the limit member in the through slot that is driven to rotate by the opposite moving rod, until it is inserted to the innermost part and similarly drives the moving rod to move to the limit member on one side of the previous pushing component to rotate out, and then the previous pushing component loses its limit and can be withdrawn from the inside of the cylindrical shell as the cylindrical shell moves;

[0020] The cylindrical housing is continuously moved for grinding until the most corner is reached, and the push component of the corner has been withdrawn, thereby realizing the purpose of grinding the valve core of the ball valve without dead angles by using the traditional grinding disc, and grinding can be performed regardless of size, which solves the problem of traditional manual grinding and the problem that the existing customized arc-shaped grinding parts cannot solve the problem of grinding of various specifications;

[0021] 2. The detection plate is in contact with the valve core. As the valve core moves, it is always tangent to the surface of the valve core. This principle is used to make the detection plate synchronously drive one of the extension rods 2, and then the transmission is used to drive the other extension rod 2 to rotate at the same angle, so that the other extension rod 2 drives the grinding disk with its own motor to always be tangent to the valve core for grinding. The grinding is more precise and there will be no uneven grinding depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle part;

[0024] Figure 3 is a side view of the present invention;

[0025] Figure 4 It is a schematic diagram of the internal structure of the present invention;

[0026] Figure 5 For the present invention Figure 4 A partial enlarged view of part B in the middle;

[0027] Figure 6It is a schematic diagram of the installation structure of the columnar housing of the present invention;

[0028] Figure 7 For the present invention Figure 6 A partial enlarged view of the middle C part;

[0029] Figure 8 It is the push plate transmission principle diagram of the present invention;

[0030] Fig. 9 This is a schematic diagram of the structure of the present invention, a schematic diagram of the angle of the valve core grinding process detection plate and the grinding disc with its own motor;

[0031] Fig.10 It is a schematic diagram of the push plate moving a gap when the rotating engaging member with the torsion spring on the electric push rod in the retracted state of the present invention is locked with the limiting member.

[0032] In the figure: 1. Synchronous shaft; 2. Fixed frame; 301. Synchronous belt three; 302. Pulley one; 303. Telescopic rod two; 304. Pulley two; 305. Relative meshing assembly; 306. Gear three; 4. Base; 5. Motor one; 6. Push assembly; 601. Electric push rod; 602. Rotating engaging member with torsion spring; 7. Detection assembly; 701. Detection plate; 8. Grinding assembly; 801. Extension rod one; 802. Telescopic rod one; 803. Grinding disc with built-in motor; 804, extension rod 2; 10, sliding groove; 11, L-shaped plate; 12, rack; 13, limit block; 14, gear 1; 15, columnar shell; 16, fixing assembly; 161, nut; 162, expansion rod 1; 163, threaded rod; 164, expansion rod 2; 17, synchronous belt 1; 18, motor 2; 19, limit piece; 20, moving rod; 21, center axis; 22, limit notch; 23, push plate; 24, spring 2; 25, gear 2; 26, synchronous belt 2. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0034] The present invention provides Figure 1-Figure 9 A valve body polishing device for a precision fluid valve shown in the figure comprises a base 4, a fixing frame 2 is integrally formed in the middle of the base 4, a push assembly 6 is arranged at both ends of the inner side of the base 4, a valve core fixing device is arranged between the two push assemblies 6, and the valve core is driven to translate by the telescopic cooperation of the two push assemblies 6, and also comprises:

[0035] A grinding assembly 8 and a detection assembly 7 are respectively arranged on the inner top of the fixing frame 2 and the top of the base 4, and both the grinding assembly 8 and the detection assembly 7 act on the surface of the valve core;

[0036] The grinding assembly 8 includes a telescopic rod 802 fixedly connected to the top of the inner part of the fixing frame 2, a grinding disc 803 with a motor is hinged at the bottom of the telescopic rod 802, and the grinding disc 803 with a motor is tangent to the valve core. The difference between the detection assembly 7 and the grinding assembly 8 is that the telescopic rod 802 on the detection assembly 7 is hinged to the detection plate 701, and a spring 1 is arranged inside the telescopic rod 802 on the detection plate 701 to push the telescopic rod 802 to extend, and the detection plate 701 is in contact with and tangent to the valve core;

[0037] One side of the two telescopic rods 802 on the grinding component 8 and the detection component 7 are fixedly connected to the extension rod 801, and the two extension rods 801 extend out of the fixed frame 2, and one end of the two extension rods 801 extending out of the fixed frame 2 is fixedly connected to the L-shaped plate 11, and one end of the two L-shaped plates 11 is fixedly connected to the rack 12, a gear 14 is meshed between the two racks 12, and the gear 14 is fixed to the outside of the fixed frame 2 through a fixed shaft connected by an internal bearing, and the outside of the two racks 12 are fixed with a limit block 13 and fixed to the outside of the fixed frame 2 through the limit block 13, and the fixed frame 2 is provided with two sliding grooves 10 for the extension rod 801 to move up and down;

[0038] There are two extension rods 804, one of which is fixed on the outer side of the rotating shaft of the grinding disc 803 with its own motor and is connected through a bearing and can drive the grinding disc 803 with its own motor to rotate; the other extension rod 804 is fixed on the detection plate 701, one end of the two extension rods 804 extends to the inner wall of the fixing frame 2 and a transmission component is arranged between the two extension rods 804 to drive the grinding disc 803 with its own motor to rotate at the same angle relative to each other when the detection plate 701 rotates.

[0039] Specifically, the transmission assembly includes two relative meshing assemblies 305 in transmission connection;

[0040] The relative meshing assembly 305 includes two pulleys 2 304 which are movably connected to the inner wall of the fixing frame 2 and fixed to one end of the extension rod 2 804 through bearings, one side of the two pulleys 2 304 is provided with a telescopic rod 2 303 fixed to the inner wall of the fixing frame 2, one end of the telescopic rod 2 303 is fixedly connected to a pulley 1 302, and a synchronous belt 301 is sleeved on the outer sides of the two pulleys 2 304 and one pulley 1 302, and the two adjacent pulleys 2 304 on the two relative meshing assemblies 305 are fixedly connected with a gear 306 and the two relative meshing assemblies 305 are connected through the gear 306, so that the rotation of the detection plate 701 drives the grinding disc 803 with its own motor to rotate through the transmission of the two relative meshing assemblies 305.

[0041] Specifically, the valve core fixing device includes a columnar housing 15 disposed between two push components 6, and a plurality of fixing components 16 are arranged in an annular array outside the columnar housing 15;

[0042] The fixing assembly 16 includes a threaded rod 163 movably connected to the cylindrical housing 15 through a bearing, a nut 161 is threadedly connected to the threaded rod 163, an expansion rod 162 is hinged to the nut 161, an expansion rod 164 is hinged to one side of the expansion rod 162, and one end of the expansion rod 164 is hinged to the outer wall of the cylindrical housing 15. The expansion rod 162 and the expansion rod 164 can be rotated by the threaded rod 163 to drive the nut 161 to move to form an outwardly expanding triangle, and the internal through hole of the valve core is fixed by using the outwardly expanding triangle;

[0043] One end of the multiple threaded rods 163 extends out of the outside of the columnar shell 15 and a synchronous belt 17 is sleeved on the outside of the multiple threaded rods 163. A motor 2 18 is also embedded on the inner side of one end of the columnar shell 15 and the motor 2 18 drives one of the threaded rods 163 to rotate, thereby driving the multiple threaded rods 163 to rotate synchronously.

[0044] Specifically, two pushing components 6 are arranged on both sides of the cylindrical shell 15 and can extend into the interior of the cylindrical shell 15 and the two pushing components 6 are arranged in a cross shape. The pushing components 6 include an electric push rod 601 and a rotating clamping piece 602 with a torsion spring arranged on both sides of one end of the electric push rod 601 and a limit is generated between the rotating clamping piece 602 with a torsion spring and the cylindrical shell 15.

[0045] Specifically, through grooves for the electric push rod 601 to extend into are provided on both sides of the cylindrical shell 15, and push plates 23 are provided inside the through grooves. A spring 24 is fixedly connected between the push plate 23 and the inner wall of the through groove, and a touch switch for controlling the two electric push rods 601 is provided on the push plate 23. The two through grooves are movably connected to a limiting member 19 on both sides through the central axis 21, and the limiting member 19 is provided with a limiting notch 22 for rotationally limiting the inner wall of the cylindrical shell 15. A gear 25 is processed on the outer side of the bottom of the central axis 21, and two moving rods 20 are symmetrically arranged on the outer side of the push plate 23, and a section of gear teeth is processed on the moving rod 20. One end of one of the moving rods 20 extends to the opposite through groove and is meshed with the gear 25 through the gear teeth. The rotating clamp 602 with the torsion spring cooperates with the limiting member 19.

[0046] Specifically, the two pushing components 6 both penetrate the base 4 through the bearing movement, and one end of one of the pushing components 6 where it penetrates the base 4 is fixedly connected to a motor 5, a synchronous shaft 1 is provided on the fixed frame 2, and a pulley is fixedly connected to the outer side of the other pushing component 6, and a synchronous belt 26 is sleeved between the transmission shaft of the motor 5 and the synchronous shaft 1 and between the pulley on the other pushing component 6 and the synchronous shaft 1, thereby realizing synchronous rotation between the two pushing components 6.

[0047] Working principle: The valve core is installed on the outside of the cylindrical shell 15, and then the motor 2 18 is started to drive the multiple threaded rods 163 to rotate, so as to form a triangle that expands outward between the multiple groups of expansion rods 1 162 and expansion rods 2 164 to fix the valve core inside the valve core, and then the cylindrical shell 15 with the valve core fixed is inserted into the electric push rod 601 on one of the pushing components 6, and the electric push rod 601 is inserted into the through groove of the cylindrical shell 15 to resist the push plate 23 inside the through groove, and then the pushing component 6 inserted into the cylindrical shell 15 is energized to push the valve core to translate inside the fixing frame 2 until the valve core translates to the detection plate 701. It contacts the grinding disk 803 of the built-in motor. After contact, the push plate 23 inside the through groove extended by the pushing component 6 is driven to move to the innermost end by using the pressure between the detection plate 701 and the grinding disk 803 of the built-in motor. As a result, the moving rod 20 on the pushing plate 23 is driven to move into the opposite through groove. During the movement, a section of gear teeth is machined on the moving rod 20, and the gear teeth are used to drive the gear 25 and the center axis 21 to rotate, and finally the limit member 19 is driven to rotate out of the through groove and is in a limited state. The motor on the grinding disk 803 of the built-in motor is started to grind the valve core. The detection plate 701 is rotated to the innermost end by the staff in advance. Fig. 9 The initial state angle shown in FIG. 1 is that only one push component 6 is currently pushing, and the other push component 6 is still a distance away from the valve core. At this time, the grinding disc 803 with its own motor can move with the detection plate 701. Fig. 9The position of the initial state, and the edge of the valve core is polished at this position, and then the valve core continues to translate, at this time, the telescopic rod 802 under the detection plate 701 is used to cooperate with the translation of the valve core to shrink and compress the spring inside the telescopic rod 802, and the extension rod 801 is used to drive the L-shaped plate 11 and the rack 12 to move while shrinking. During the movement, a rack 12 is used to drive the gear 14 to rotate, so that the gear 14 drives the other rack 12 to move in the opposite direction, and at the same time, the other rack 12 is used to drive the telescopic rod 802 fixed on the polishing disk 803 of the self-contained motor to shrink, so that the polishing disk 803 of the self-contained motor moves due to the movement of the detection plate 701, so that the detection plate 701 can be used to detect the surface position of the valve core to adjust the polishing position of the polishing disk 803 of the self-contained motor so that the polishing disk 803 of the self-contained motor always polishes the outer surface of the valve core;

[0048] Then, when the pushing component 6 is extended to almost the maximum extension, another pushing component 6 begins to enter another through slot inside the cylindrical shell 15 until it is fully inserted. During this period, the elastic contraction structure of the rotating engaging member 602 with a torsion spring is used to break through the limit of the limit member 19 in the through slot that is driven to rotate by the opposite moving rod 20, until it is inserted to the innermost part and similarly drives the moving rod 20 to move to the limit member 19 on one side of the previous pushing component 6 to rotate out, and then the touch switch provided on the push plate 23 is used to drive the subsequent pushing component 6 to retract. During the contraction, there is a gap between the limit member 19 and the farthest moving position of the rotating engaging member 602 with a torsion spring (the gap is as shown in FIG. 2 ). Fig.10 As shown, the retracted electric push rod 601 retracts to one side for a distance, then releases the push plate to move for a distance and then gets stuck with the limiter 19), so that the push assembly 6 moves to the limiter 19 in the first period of time before it retracts, and only when it continues to retract will the limit between the limiter 19 and the rotating engaging member 602 with the torsion spring be used to drive the entire cylindrical shell 15 and the valve core to move, and during this first period of contraction, the push plate 23 moves back for a distance due to the elastic force of the second spring 24, which also drives the moving rod 20 to move, and the movement of the moving rod 20 drives the gear 2 25 and the limiter 19 of the previous push assembly 6 to retract back into the cylindrical shell 15 through meshing connection, that is, the previous push assembly 6 loses the limit and can be withdrawn from the inside of the cylindrical shell 15 as the cylindrical shell 15 moves;

[0049] The cylindrical housing 15 continues to move and grind until the corner is reached, and the push assembly 6 of the corner has been withdrawn, thereby achieving the purpose of grinding the ball valve core without dead angles by using a traditional grinding disc, and grinding can be performed regardless of size, which solves the problem of traditional manual grinding and the problem that the existing customized arc-shaped grinding parts cannot solve the problem of grinding of various specifications;

[0050] Then, the detection plate 701 is used to contact the valve core and is always in a tangent state with the valve core surface as the valve core moves. This principle is used to make the detection plate 701 synchronously drive one of the extension rods 804, and then the relative engagement component 305 is used to drive the other extension rod 804 to rotate at the same angle, thereby achieving that the other extension rod 804 drives the grinding disc 803 with its own motor to always be in a tangent state with the valve core for grinding, and the grinding is more precise and there will be no uneven grinding depth.

[0051] Finally, by utilizing the synchronous rotation between the two pushing components 6, that is, driving the cylindrical shell 15 and the entire valve core to rotate and polish between the detection plate 701 and the polishing disk 803 with its own motor, and the synchronous rotation of the two pushing components 6, that is, relative stillness, can achieve stable switching between the two pushing components 6.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve body polishing device for a precision fluid valve, comprising a base (4), wherein a fixing frame (2) is integrally formed in the middle of the base (4), and characterized in that: Both ends of the inner side of the base (4) are provided with a pushing assembly (6), a valve core fixing device is provided between the two pushing assemblies (6), and the valve core is driven to move in translation through the telescopic cooperation of the two pushing assemblies (6), and further comprising: A grinding component (8) and a detection component (7) are respectively arranged on the inner top of the fixing frame (2) and the top of the base (4), and the grinding component (8) and the detection component (7) both act on the surface of the valve core; The grinding assembly (8) comprises a telescopic rod (802) fixedly connected to the top of the fixed frame (2), a grinding disc (803) with a motor is hingedly connected to the bottom of the telescopic rod (802), and the grinding disc (803) with a motor is tangent to the valve core. The difference between the detection assembly (7) and the grinding assembly (8) is that the telescopic rod (802) on the detection assembly (7) is hingedly connected to the detection plate (701), and a spring (1) is arranged inside the telescopic rod (802) on the detection plate (701) to push the telescopic rod (802) to extend, and the detection plate (701) is in contact with and tangent to the valve core. One side of the two telescopic rods (802) on the grinding component (8) and the detection component (7) is fixedly connected to an extension rod (801), and the two extension rods (801) extend out of the fixed frame (2); one end of the two extension rods (801) extending out of the fixed frame (2) is fixedly connected to an L-shaped plate (11); one end of the two L-shaped plates (11) is fixedly connected to a rack (12); a gear (14) is meshed between the two racks (12), and the gear (14) is fixed to the outside of the fixed frame (2) via a fixed shaft connected by an internal bearing; the outside of the two racks (12) is fixed with a limit block (13) and is fixed to the outside of the fixed frame (2) via the limit block (13); and the fixed frame (2) is provided with two sliding grooves (10) for the extension rods (801) to move up and down; Two extension rods (804), one of which is fixed to the outer side of the rotating shaft of the grinding disc (803) with its own motor and connected via a bearing and can drive the grinding disc (803) with its own motor to rotate; the other extension rod (804) is fixed to the detection plate (701), one end of the two extension rods (804) extends to the inner wall of the fixing frame (2), and a transmission component is arranged between the two extension rods (804) to drive the grinding disc (803) with its own motor to rotate at the same angle relative to the detection plate (701).

2. The valve body polishing device for a precision fluid valve according to claim 1, characterized in that: The transmission assembly comprises two relatively meshing assemblies (305) in transmission connection; The relative meshing assembly (305) comprises two pulleys (304) movably connected to the inner wall of the fixing frame (2) and fixed to one end of the extension rod (804) through bearings; one side of the two pulleys (304) is provided with a telescopic rod (303) fixed to the inner wall of the fixing frame (2); one end of the telescopic rod (303) is fixedly connected to a pulley (302); a synchronous belt (301) is sleeved on the outer sides of the two pulleys (304) and one pulley (302); two adjacent pulleys (304) on the two relative meshing assemblies (305) are fixedly connected to a gear (306) and the two relative meshing assemblies (305) are connected through the gear (306) to rotate, so that the rotation of the detection plate (701) drives the grinding disc (803) with its own motor to rotate through the transmission of the two relative meshing assemblies (305).

3. The valve body polishing device for a precision fluid valve according to claim 1, characterized in that: The valve core fixing device comprises a columnar housing (15) arranged between two pushing components (6), and a plurality of fixing components (16) are arranged in an annular array on the outer side of the columnar housing (15); The fixing assembly (16) comprises a threaded rod (163) movably connected to the columnar housing (15) via a bearing, a nut (161) being threadedly connected to the threaded rod (163), an expansion rod 1 (162) being hingedly connected to the nut (161), a second expansion rod (164) being hingedly connected to one side of the expansion rod 1 (162), one end of the second expansion rod (164) being hingedly connected to an outer arm of the columnar housing (15), and the expansion rod 1 (162) and the expansion rod 2 (164) can be rotated by the threaded rod (163) to drive the nut (161) to move, thereby forming an outwardly expanding triangle, and the internal through hole of the valve core is fixed by using the outwardly expanding triangle; One end of each of the plurality of threaded rods (163) extends out of the outside of the columnar housing (15), and a first synchronous belt (17) is sleeved on the outside of the plurality of threaded rods (163). A second motor (18) is also embedded on the inside of one end of the columnar housing (15), and the second motor (18) drives one of the threaded rods (163) to rotate, thereby driving the plurality of threaded rods (163) to rotate synchronously.

4. The valve body polishing device for a precision fluid valve according to claim 1, characterized in that: The two pushing assemblies (6) are arranged on both sides of the columnar housing (15) and can extend into the interior of the columnar housing (15). The two pushing assemblies (6) are arranged in a cross shape. The pushing assemblies (6) include an electric push rod (601) and a rotating engaging member (602) with a torsion spring arranged on both sides of one end of the electric push rod (601). The rotating engaging member (602) with the torsion spring and the columnar housing (15) generate a limit.

5. The valve body polishing device for a precision fluid valve according to claim 4, characterized in that: The two sides of the columnar housing (15) are provided with through slots into which the electric push rods (601) can extend, and a push plate (23) is provided inside the through slots, a spring (24) is fixedly connected between the push plate (23) and the inner wall of the through slot, and a light touch switch capable of controlling the two electric push rods (601) is provided on the push plate (23), and both sides of the two through slots are movably connected to a limit member (19) through a central axis (21), and the limit member (19) is provided with a spring that is in contact with the inner wall of the columnar housing (15). A limiting notch (22) is provided on the wall for rotation limiting, a gear 2 (25) is processed on the outer side of the bottom of the central axis (21), two moving rods (20) are symmetrically arranged on the outer side of the push plate (23), and a section of gear teeth is processed on the moving rods (20), one end of one of the moving rods (20) extends to the opposite through groove and is meshed with the gear 2 (25) through the gear teeth, and the rotating engaging member (602) with the torsion spring cooperates with the limiting member (19).

6. The valve body polishing device for a precision fluid valve according to claim 1, characterized in that: The two pushing components (6) are both movably connected to the base (4) through the bearing, and one end of the pushing component (6) passing through the base (4) is fixedly connected to a motor 1 (5), a synchronous shaft (1) is arranged on the fixed frame (2), and a pulley is fixedly connected to the outer side of the other pushing component (6), and a synchronous belt 2 (26) is sleeved between the transmission shaft of the motor 1 (5) and the synchronous shaft (1) and between the pulley on the other pushing component (6) and the synchronous shaft (1), thereby achieving synchronous rotation between the two pushing components (6).

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