A polishing apparatus for valve interiors

Abstract

This utility model relates to the field of valve processing technology, and in particular to a polishing and grinding device for valve cavities. It includes a processing table with a vertical platform fixed to its top rear end. Electric slides are installed on both sides of the top of the processing table and on the front upper side of the vertical platform. A polishing mechanism is installed on the electric slides for polishing and grinding valve cavities. The polishing mechanism includes: a drive assembly, including a mounting base installed on the electric slide, with a transmission mechanism fixed inside the mounting base; and an execution assembly, including a cylindrical seat fixed to the output end of the transmission mechanism. A housing is fixed to the bottom of the cylindrical seat, and three circumferentially distributed grooves are opened at the lower end of the housing. Bushings are slidably installed inside the grooves, and shaft heads are rotatably installed inside the bushings. A grinding head is fixed to the bottom of the shaft head. Through the radial adaptive adjustment function of the grinding head, it can accurately adapt to the internal cavity dimensions of valves of different specifications. Combined with a composite motion mode of revolution and rotation, a uniform and efficient polishing effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of valve processing technology, specifically to a polishing and grinding device for the inner cavity of a valve. Background Technology

[0002] As a key control component in industrial pipeline systems, the processing quality of the inner surface of valves directly affects the flow characteristics and sealing performance of the medium. With the increasing precision requirements of modern industry for fluid control systems, valve manufacturing processes are developing towards higher precision and higher efficiency. In particular, for valve products with complex internal cavity structures, such as ball valves and plug valves, the polishing treatment of their inner surfaces has become an important process to ensure valve performance. According to CN213034362U, a valve inner cavity polishing and grinding device is disclosed. This technology discloses a technical solution such as "a valve inner cavity polishing and grinding device, including a grinding box, wherein a first motor is fixedly installed on the bottom wall of the inner cavity of the grinding box". It has the technical effect of "when grinding, the valve body to be polished is first placed inside the holder to position it. At this time, the paint gun blows out the residue on the inner wall of the valve body, which facilitates the subsequent polishing. When the first motor runs, its output shaft rotates, which drives the turntable and the valve body on its top to rotate, so that no less than a number of valve bodies face the polishing wheel. The electric push rod moves the mounting plate and polishing wheel into the interior of the valve body. Then, the second motor polishes the valve body. After polishing, the valve body also faces the air gun to blow out its internal impurities, achieving the purpose of high polishing efficiency". Traditional equipment, due to the use of fixed-size grinding heads, cannot adapt to the size variations of the inner cavity of valves of different specifications, resulting in incomplete polishing coverage and uneven effects; at the same time, most equipment only has a single-direction polishing function, which makes it difficult to eliminate unidirectional polishing textures and cannot meet the high standard of surface finish requirements. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a polishing and grinding device for valve cavities. Through the radial adaptive adjustment function of the grinding head, it can accurately adapt to the internal cavity dimensions of valves of different specifications. By combining the composite motion mode of revolution and rotation, a uniform and efficient polishing effect is achieved.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a polishing and grinding device for valve cavities, comprising a processing table, a vertical platform fixed to the rear end of the top of the processing table, and electric slides installed on both sides of the top of the processing table and the front side of the upper end of the vertical platform. A polishing mechanism is provided on the electric slides for polishing and grinding the valve cavity. The polishing mechanism includes: The drive assembly includes a mounting base installed on the electric slide, and a transmission mechanism is fixed inside the mounting base; The actuator includes a cylindrical base fixed to the output end of the transmission. A housing is fixed to the bottom of the cylindrical base. Three circumferentially distributed grooves are opened at the lower end of the housing. A bushing is slidably installed inside the groove. A shaft head is rotatably installed inside the bushing. A grinding head is fixed to the bottom of the shaft head. A disc is rotatably installed at the lower end of the cylindrical base. Three circumferentially distributed connecting rods are pivotally connected to the bottom of the disc. The other end of the connecting rods is pivotally connected to the upper end of the shaft head. Connecting rods are fixed to the outer wall of the disc. A worm gear is rotatably installed at the bottom of the cylindrical base through a shaft bracket and meshes with a worm wheel for transmission.

[0005] Preferably, the actuating component further includes a transmission gear fixed to the outer wall of the shaft head, a driven gear rotatably mounted at the lower end of the pivot joint between the connecting rod and the disc seat, and the driven gear meshes with the transmission gear for transmission. A second motor is installed inside the cylinder seat, and a driving gear is fixed at the output end of the second motor and meshes with the driven gear for transmission.

[0006] Preferably, the actuating component further includes a shaft that passes through and is fixed inside the worm gear, with both ends of the shaft extending to the outside of the housing, and both ends of the shaft having internal hexagonal holes.

[0007] Preferably, the drive assembly further includes a first motor mounted on the outer wall of the mounting base, with a drive pulley fixed to the output end of the first motor, a driven pulley fixed to the input end of the transmission, and a belt installed between the driven pulley and the drive pulley.

[0008] Preferably, the power supply line of the second motor is provided with a slip ring to realize dynamic electrical connection between the rotating part and the fixed power supply equipment.

[0009] Preferably, the two ends of the cylinder seat are provided with radial reinforcing ribs, which extend axially along the cylinder seat and are integrally formed with the cylinder wall.

[0010] Beneficial effects This invention provides a polishing and grinding device for valve inner cavities. Compared with the prior art, it has the following advantages: 1. When the worm rotates, it drives the disc seat to rotate through the worm wheel. The disc seat drives the shaft head through the connecting rod. The shaft head slides along the inside of the slide groove through the bushing, so that the shaft head drives the grinding head to move radially. This can adapt to valve cavities of different diameters. Furthermore, it ensures the optimal contact pressure between the grinding head and the workpiece surface during the polishing process. The three circumferentially distributed grinding heads form a uniform polishing trajectory under the synergistic effect of revolution and radial adjustment, effectively avoiding the surface unevenness problem caused by traditional single-point polishing.

[0011] 2. The output of the second motor drives the drive gear to rotate, which in turn drives the transmission gear to rotate through the driven gear. The transmission gear then drives the grinding head to rotate through the shaft. This gear transmission system works independently yet collaboratively with the radial adjustment mechanism consisting of the disc base and connecting rod, ensuring that the grinding head maintains stable rotation during radial adjustment. Furthermore, the combined revolution and rotation of the grinding head during polishing effectively avoids uneven surface texture caused by unidirectional polishing. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the polishing mechanism in this utility model; Figure 3 This is a schematic diagram of the structure of the execution component in this utility model; Figure 4 This is a cross-sectional view of the execution component in this utility model; Figure 5 This is a schematic diagram of the internal structure of the execution component in this utility model; Figure 6 This is a schematic diagram of the internal structure of the outer shell in this utility model.

[0013] In the diagram: 1. Machining table; 2. Vertical table; 3. Electric slide table; 4. Polishing mechanism; 41. Drive assembly; 411. Mounting base; 412. Transmission mechanism; 413. First motor; 414. Drive pulley; 415. Driven pulley; 416. Belt; 42. Actuation assembly; 421. Cylinder seat; 422. Housing; 423. Slide groove; 424. Bushing; 425. Shaft head; 426. Grinding head; 427. Disc base; 428. Connecting rod; 429. Worm gear; 4210. Worm; 4211. Shaft; 4212. Socket hexagonal hole; 4213. Transmission gear; 4214. Driven gear; 4215. Second motor; 4216. Drive gear. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1 - Figure 6This utility model provides a technical solution: a polishing and grinding device for the inner cavity of a valve, including a processing table 1, a vertical platform 2 fixed to the top and rear end of the processing table 1, and electric slides 3 installed on both sides of the top of the processing table 1 and the front side of the upper end of the vertical platform 2. A polishing mechanism 4 is provided on the electric slides 3 for polishing and grinding the inner cavity of the valve. The polishing mechanism 4 includes: The drive assembly 41 includes a mounting base 411 mounted on the electric slide table 3, and a transmission 412 is fixed inside the mounting base 411. The actuator 42 includes a cylindrical base 421 fixed to the output end of the transmission 412. A housing 422 is fixed to the bottom of the cylindrical base 421. Three circumferentially distributed sliding grooves 423 are opened at the lower end of the housing 422. A bushing 424 is slidably installed inside the sliding grooves 423. A shaft head 425 is rotatably installed inside the bushing 424. A grinding head 426 is fixed to the bottom of the shaft head 425. A disc base 427 is rotatably installed at the lower end of the cylindrical base 421. Three circumferentially distributed connecting rods 428 are pivotally connected to the bottom of the disc base 427. The other end of the connecting rods 428 is pivotally connected to the upper end of the shaft head 425. The connecting rods 428 are fixed to the outer wall of the disc base 427. A worm gear 4210 is rotatably installed at the bottom of the cylindrical base 421 through a shaft bracket and meshes with a worm wheel 429 for transmission.

[0016] In this embodiment, when the worm gear 4210 rotates, it drives the disc base 427 to rotate via the worm wheel 429. The disc base 427 drives the shaft head 425 via the connecting rod 428. The shaft head 425 slides along the inside of the slide groove 423 via the bushing 424, so that the shaft head 425 drives the grinding head 426 to move radially, which can adapt to valve cavities of different diameters. Furthermore, it ensures the optimal contact pressure between the grinding head 426 and the workpiece surface during the polishing process. The three circumferentially distributed grinding heads 426 form a uniform polishing trajectory under the synergistic effect of revolution and radial adjustment, effectively avoiding the surface unevenness problem caused by traditional single-point polishing.

[0017] Specifically, the execution component 42 also includes a transmission gear 4213 fixed to the outer wall of the shaft head 425, a driven gear 4214 rotatably mounted at the lower end of the pivot joint between the connecting rod 428 and the disc base 427, and the driven gear 4214 meshes with the transmission gear 4213 for transmission. A second motor 4215 is installed inside the cylinder base 421, and a driving gear 4216 is fixed to the output end of the second motor 4215 and meshes with the driven gear 4214 for transmission.

[0018] In this embodiment, the output end of the second motor 4215 drives the drive gear 4216 to rotate. The drive gear 4216 drives the transmission gear 4213 to rotate through the driven gear 4214. The transmission gear 4213 drives the grinding head 426 to rotate through the shaft head 425. This gear transmission system, together with the radial adjustment mechanism composed of the disc base 427 and the connecting rod 428, works independently yet collaboratively, so that the grinding head 426 can still maintain a stable rotational motion during the radial adjustment process. Furthermore, through the combined revolution and rotational motion of the grinding head 426 during the polishing process, the uneven surface texture caused by unidirectional polishing is effectively avoided.

[0019] Specifically, the execution component 42 also includes a shaft 4211 that passes through and is fixed inside the worm gear 4210, and both ends of the shaft 4211 extend to the outside of the housing 422. Both ends of the shaft 4211 are provided with internal hexagonal holes 4212.

[0020] In this embodiment, the worm gear 429 on the shaft 4211 can be rotated by inserting an Allen wrench into the Allen hole 4212.

[0021] Specifically, the drive assembly 41 also includes a first motor 413 mounted on the outer wall of the mounting base 411. The output end of the first motor 413 is fixed with a drive pulley 414, the input end of the transmission 412 is fixed with a driven pulley 415, and a belt 416 is installed between the driven pulley 415 and the drive pulley 414.

[0022] In this embodiment, the output end of the first motor 413 drives the active pulley 414 to rotate in conjunction with the belt 416, which in turn drives the driven pulley 415 to rotate. The driven pulley 415 drives the grinding head 426 in the execution component 42 to revolve through the transmission 412.

[0023] Specifically, the power supply line of the second motor 4215 is equipped with a slip ring to realize the dynamic electrical connection between the rotating parts and the fixed power supply equipment.

[0024] In this embodiment, a slip ring structure is provided in the power supply line of the second motor 4215. This structure achieves dynamic electrical connection between the rotating cylinder 421 and the fixed power supply equipment by installing a conductive slip ring on the rotating component and sliding contact with the brush. This allows the second motor 4215 to continue to receive power supply through the cooperation of the slip ring and the brush when the transmission 412 drives the execution component 42 to revolve, effectively solving the problem of wire entanglement under rotating conditions.

[0025] Specifically, the cylindrical base 421 has radial reinforcing ribs at both ends of the mating surfaces. These reinforcing ribs extend axially along the cylindrical base and are integrally formed with the cylindrical wall.

[0026] In this embodiment, the reinforcing ribs effectively resist the torsional torque output by the transmission and the radial impact load generated by the contact between the grinding head and the workpiece during the polishing operation.

[0027] The working principle and usage process of this utility model are as follows: First, the valve is placed in the positioning fixture on the processing table 1; then, by inserting an Allen wrench into the Allen hole 4212, the worm gear 429 on the shaft 4211 is rotated. When the worm 4210 rotates, the worm gear 429 drives the disc seat 427 to rotate. The disc seat 427 drives the shaft head 425 through the connecting rod 428. The shaft head 425 slides along the inside of the slide groove 423 through the bushing 424, so that the shaft head 425 drives the grinding head 426 to move radially until it is adapted to the inner cavity of the valve. Then, the actuator 42 on the drive assembly 41 is extended into the valve cavity by the electric slide table 3; then the output end of the first motor 413 drives the drive pulley 414 to rotate in conjunction with the belt 416, which in turn drives the driven pulley 415 to rotate. The driven pulley 415 drives the grinding head 426 in the actuator 42 to revolve through the transmission machine 412; at the same time, the output end of the second motor 4215 drives the drive gear 4216 to rotate. The drive gear 4216 drives the transmission gear 4213 to rotate through the driven gear 4214. The transmission gear 4213 drives the grinding head 426 to rotate through the shaft head 425. Through the combined motion of the revolution and rotation of the grinding head 426 during the polishing process, the uneven surface texture caused by unidirectional polishing is effectively avoided.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polishing and grinding device for the inner cavity of a valve, comprising a processing table (1), a vertical table (2) is fixed to the top rear end of the processing table (1), an electric sliding table (3) is installed on the top of the processing table (1) and the upper front side of the vertical table (2), characterized in that: The electric slide (3) is equipped with a polishing mechanism (4) for polishing the valve cavity. The polishing mechanism (4) includes: The drive assembly (41) includes a mounting base (411) mounted on the electric slide (3), and a transmission (412) is fixed inside the mounting base (411). The actuator (42) includes a cylinder seat (421) fixed to the output end of the transmission (412). A housing (422) is fixed to the bottom of the cylinder seat (421). Three circumferentially distributed grooves (423) are opened at the lower end of the housing (422). A bushing (424) is slidably installed inside the groove (423). A shaft head (425) is rotatably installed inside the bushing (424). A grinding head (426) is fixed to the bottom of the shaft head (425). A disc seat (427) is rotatably installed at the lower end of the cylinder seat (421). Three circumferentially distributed connecting rods (428) are pivotally connected to the bottom of the disc seat (427). The other end of the connecting rods (428) is pivotally connected to the upper end of the shaft head (425). The connecting rods (428) are fixed to the outer wall of the disc seat (427). A worm gear (4210) is rotatably installed at the bottom of the cylinder seat (421) through a shaft frame and meshes with a worm wheel (429) for transmission.

2. A polishing apparatus for the interior of a valve according to claim 1, characterized in that: The actuation component (42) also includes a transmission gear (4213) fixed on the outer wall of the shaft head (425), a driven gear (4214) is rotatably mounted at the lower end of the pivot joint between the connecting rod (428) and the disc base (427), and the driven gear (4214) meshes with the transmission gear (4213) for transmission. A second motor (4215) is installed inside the cylinder base (421), and a driving gear (4216) is fixed at the output end of the second motor (4215) and meshes with the driven gear (4214) for transmission.

3. A polishing apparatus for the interior of a valve according to claim 1, wherein: The actuation component (42) also includes a shaft (4211) that passes through and is fixed inside the worm gear (4210), and both ends of the shaft (4211) extend to the outside of the housing (422), and both ends of the shaft (4211) are provided with internal hexagonal holes (4212).

4. A polishing apparatus for valve bores as defined in claim 1, wherein: The drive assembly (41) also includes a first motor (413) mounted on the outer wall of the mounting base (411). The output end of the first motor (413) is fixed with a drive pulley (414), the input end of the transmission (412) is fixed with a driven pulley (415), and a belt (416) is installed between the driven pulley (415) and the drive pulley (414).

5. A polishing and grinding device for valve inner cavity according to claim 2, characterized in that: The power supply line of the second motor (4215) is equipped with a slip ring to realize the dynamic electrical connection between the rotating parts and the fixed power supply equipment.

6. The polishing and grinding equipment for valve inner cavity according to claim 1, characterized in that: The cylindrical base (421) is provided with radial reinforcing ribs at both ends of the joint surface. The reinforcing ribs extend along the axial direction of the cylindrical base and are integrally formed with the cylindrical wall.

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