Grinding tool for machining ball valve spool

Abstract

The utility model belongs to the ball valve core processing technical field, concretely relates to a kind of grinding tool for ball valve core processing, including table frame and valve core body, the table frame is provided with center support mechanism and transmission assembly, the valve core body is set on center support mechanism, and with transmission assembly center corresponding, switch for controlling center support mechanism and transmission assembly is installed on the table frame.The utility model is linked through center support mechanism and transmission assembly, realizes the rotation of valve core inside support fixed simultaneously, combines two groups of angular adjustment mechanism arranged oppositely, forms efficient symmetrical grinding system, fundamentally ensures the precision and consistency of grinding processing.

Description

Technical Field

[0001] This utility model belongs to the field of ball valve core processing technology, specifically relating to a grinding fixture for ball valve core processing. Background Technology

[0002] In the manufacturing process of ball valve cores, grinding is a key finishing step that directly affects the sealing performance and service life of the valve core. However, existing grinding fixtures often have many shortcomings: most current grinding devices rely on a suspended grinding base to contact the valve core, and the grinding base is mostly connected by a universal joint. This makes the grinding base prone to inconsistencies in grinding angle and feed rate due to its own weight during the grinding process, which in turn affects the grinding effect and processing efficiency.

[0003] Therefore, this utility model proposes a grinding fixture for processing ball valve cores to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a grinding fixture for processing ball valve cores, which can solve the above-mentioned technical problems.

[0005] The specific technical solution adopted by this utility model is as follows: This utility model provides a grinding fixture for processing ball valve cores, including a table and a valve core body. The table is provided with a central support mechanism and a transmission assembly. The valve core body is disposed on the central support mechanism and corresponds to the center of the transmission assembly. A switch for controlling the central support mechanism and the transmission assembly is installed on the table. The central support mechanism includes a suspension shaft and a front push rod. One end of the suspension shaft is provided with an inner support component that matches the inner sleeve of the valve core body's inner hole, and the inner support component matches the inner sleeve of the through hole on the valve core body. The suspension shaft is mounted on a first fixed frame via bearings. The first fixed frame is bolted to a table frame. A rotating motor is mounted on the table frame, and the rotating motor is connected to the other end of the suspension shaft via a coupling.

[0006] Preferably, the inner support includes a retaining tube, an outer support arc plate, and an inner push arc plate. The inner push arc plate is configured as two pieces, and the two pieces are configured as symmetrical semicircles. The two inner push arc plates are disposed inside the retaining tube. The outer support arc plate is configured as two pieces, and the two pieces are configured as symmetrical semicircles, located on the outer periphery of the clamping tube. The clamping tube has symmetrical clamping holes, and a connecting plate is slidably clamped in the clamping holes. The connecting plate is fixed between the outer support arc plate and the inner push arc plate. The end face of the clamping tube is fixed to one end of the suspension shaft.

[0007] Preferably, the front push rod is rotatably mounted on the translation seat, and the translation seat is slidably mounted on the table frame. One end of the front push rod is inserted into two inner push arc plates inside the card hole tube, and the other end is rotatably engaged with the adjusting screw through a bearing. The adjusting screw is threadedly connected to the second fixed frame, and the second fixed frame is bolted to the table frame.

[0008] Preferably, the transmission assembly includes two sets of third fixed frames and a swing angle adjustment mechanism disposed on the two sets of third fixed frames. Both sets of third fixed frames are bolted to the table frame. Two sets of transmission components are disposed on opposite sides of the two sets of third fixed frames and are respectively connected to the two swing angle adjustment mechanisms. The lower sides of the two sets of transmission components are respectively connected to both sides of the synchronous shaft. The synchronous shaft is disposed on the lower inner side of the table frame and is rotatably mounted on a bearing seat. The bearing seat is detachably mounted on the corner plate. Two support leg connecting rods are fixed between the two support legs on one side of the table frame. The upper support leg connecting rod is fixedly connected to the corner plate. The bolt holes on the table frame are all designed as waist holes.

[0009] Preferably, a bevel gear set is provided at the end of the synchronous shaft corresponding to the support leg connecting rod, and the bevel gear set is connected to the output shaft of the grinding motor installed on the two support leg connecting rods.

[0010] Preferably, the swing angle adjustment mechanism includes a drive shaft and a grinding base. The drive shaft is rotatably mounted on the third fixed frame via a bearing. One end of the drive shaft is connected to a transmission component, and the other end is fixed to a vertical wall. The grinding base is fitted to the outer periphery of the valve core body, and the angle between the grinding base and the straight line of the transmission shaft on the two sets of swing angle adjustment mechanisms is set between 20° and 30°. The back of the grinding base is hinged to the other side of the transmission shaft and a parallel connecting piece is provided.

[0011] Preferably, a vertical connector is hinged to the back of the grinding base, and the free end of the vertical connector is inserted into a through hole on the free end of the vertical wall. A rectangular hole with a through hole is provided on the vertical wall, and the free end of the vertical connector is bolted into the rectangular hole. The free end of the vertical wall is threaded with a tightening bolt, which extends into the through hole and abuts against the side of the vertical connector.

[0012] Preferably, the hinge directions of the vertical connector and the parallel connector are perpendicular to each other, and the center point between them corresponds to the center of the back of the grinding base. The vertical and parallel connectors are in an outward-expanding state with the hinge point on the back of the grinding base as the endpoint.

[0013] The beneficial effects are: 1. This utility model, through the linkage of the central support mechanism and the transmission component, achieves both the fixing and rotation of the valve core's inner support, while combining two sets of opposing swing angle adjustment mechanisms to form a highly efficient symmetrical grinding system, fundamentally ensuring the precision and consistency of the grinding process.

[0014] 2. The swing angle adjustment mechanism of this utility model has two advantages: firstly, it can be flexibly adjusted to adapt to ball valve cores of different radii, realizing multiple uses of one machine; secondly, it can dynamically maintain the preset optimal grinding angle throughout the grinding process, thereby continuously ensuring high precision and high surface quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the central support mechanism of this utility model; Figure 3 This is a schematic diagram of the transmission component structure of this utility model; Figure 4 This is a schematic diagram of the swing angle adjustment mechanism of this utility model.

[0016] The attached diagram lists the components represented by each number as follows: 1. Table frame; 2. Central support mechanism; 21. Suspension shaft; 22. Clip-hole tube; 23. Outer support arc plate; 24. Inner push arc plate; 25. First fixed frame; 26. Rotary motor; 27. Front push rod; 28. Translation seat; 29. ​​Second fixed frame; 210. Adjusting screw; 3. Transmission assembly; 31. Third fixed frame; 32. Swing angle adjustment mechanism; 321. Transmission shaft; 322. Parallel connector; 323. Grinding base; 324. Vertical connector; 325. Vertical wall; 325a. Through hole; 325b. Rectangular hole; 326. Tightening bolt; 33. Transmission component; 34. Synchronous shaft; 35. Bearing seat; 36. Grinding motor; 36a. Bevel gear set; 4. Switch; 5. Leg connecting rod; 6. Valve core body. Detailed Implementation

[0017] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0018] like Figure 1-4As shown, a grinding fixture for processing ball valve cores includes a table frame 1 and a valve core body 6. The table frame 1 is provided with a central support mechanism 2 and a transmission assembly 3. The valve core body 6 is disposed on the central support mechanism 2 and corresponds to the center of the transmission assembly 3. A switch 4 for controlling the central support mechanism 2 and the transmission assembly 3 is installed on the table frame 1. The switch 4 is electrically connected to both the rotation motor 26 and the grinding motor 36. The central support mechanism 2 includes a suspension shaft 21 and a front push rod 27. One end of the suspension shaft 21 is provided with an inner support component that matches the inner sleeve of the inner hole of the valve core body 6, and the inner support component matches the inner sleeve of the through hole on the valve core body 6. The suspension shaft 21 is mounted on the first fixed frame 25 through a bearing. The first fixed frame 25 is bolted to the table frame 1. A rotating motor 26 is mounted on the table frame 1. The rotating motor 26 is connected to the other end of the suspension shaft 21 through a coupling.

[0019] As an optional implementation, the inner support includes a retaining tube 22, an outer support arc plate 23, and an inner push arc plate 24. The inner push arc plate 24 is configured as two pieces, and the two pieces are configured as symmetrical semicircles. The two inner push arc plates 24 are disposed inside the retaining tube 22. Two outer support arc plates 23 are provided, and the two plates are symmetrical semicircles located on the outer periphery of the clamping tube 22. The clamping tube 22 has symmetrical clamping holes, and a connecting plate is slidably clamped in the clamping holes. The connecting plate is fixed between the outer support arc plate 23 and the inner push arc plate 24. The end face of the clamping tube 22 is fixed to one end of the suspension shaft 21. In this way, the inner support component can be circumferentially translated on the clamping tube 22 by utilizing the connection relationship between the outer support arc plate 23 and the inner push arc plate 24, so as to perform subsequent clamping operations in the through hole on the valve core body 6.

[0020] See attached document Figure 2 The front push rod 27 is rotatably mounted on the translation seat 28, while the translation seat 28 is slidably mounted on the table frame 1. One end of the front push rod 27 is inserted into two inner push arc plates 24 inside the card hole tube 22, and the other end is rotatably engaged with the adjusting screw 210 through a bearing. The adjusting screw 210 is threadedly connected to the second fixed frame 29, and the second fixed frame 29 is bolted to the table frame 1. In this way, the front push rod 27 can be translated using the adjusting screw 210, thereby cooperating with the inner support to achieve the inner support and fixation operation of the through hole on the valve core body 6.

[0021] See attached document Figure 3The transmission component 3 includes two sets of third fixed frames 31 and swing angle adjustment mechanisms 32 set on the two sets of third fixed frames 31. Both sets of third fixed frames 31 are bolted to the table frame 1. Two sets of transmission components 33 are set on opposite sides of the two sets of third fixed frames 31, which are respectively connected to the two swing angle adjustment mechanisms 32. The lower sides of the two sets of transmission components 33 are respectively connected to both sides of the synchronous shaft 34. The synchronous shaft 34 is set on the lower side inside the table frame 1 and is rotatably mounted on the bearing seat 35. The bearing seat 35 is detachably mounted on the corner plate. Two support leg connecting rods 5 are fixed between the two support legs on one side of the table frame 1. The upper support leg connecting rod 5 is fixedly connected to the corner plate. The transmission component 33 is a combination of synchronous belt and synchronous pulley or a combination of belt and pulley. In this way, the synchronous shaft 34 and the transmission component 33 can perform synchronous transmission processing on the two sets of swing angle adjustment mechanisms 32. The bolt connection holes 325a on the table frame 1 are all designed as waist holes, so that the third fixed frame 31, the second fixed frame 29 and the first fixed frame 25 have a certain range of adjustment.

[0022] Furthermore, a bevel gear set 36a is provided at the end of the synchronous shaft 34 corresponding to the support leg connecting rod 5. The bevel gear set 36a is connected to the output shaft of the grinding motor 36 mounted on the two support leg connecting rods 5. The bevel gear set 36a consists of two vertically meshing bevel gears. The bevel gears are keyed to the synchronous shaft 34 and the output shaft of the grinding motor 36. In this way, the grinding motor 36 can drive the two sets of swing angle adjustment mechanisms 32 to rotate synchronously using the bevel gear set 36a and the synchronous shaft 34, thereby grinding the valve core body 6.

[0023] Furthermore, the swing angle adjustment mechanism 32 includes a drive shaft 321 and a grinding base 323. The drive shaft 321 is rotatably mounted on the third fixed frame 31 via a bearing. One end of the drive shaft 321 is connected to the transmission component 33, and the other end is fixed with a vertical wall 325. The grinding base 323 is fitted to the outer periphery of the valve core body 6, and the angle between the grinding base 323 and the transmission shaft 321 on the two sets of swing angle adjustment mechanisms 32 is set between 20° and 30°. The back of the grinding base 323 is hinged to the other side of the transmission shaft 321 with a parallel connecting piece 322, so that the grinding base 323 and the transmission shaft 321 form a hinged connection relationship, which facilitates the subsequent swing angle adjustment of the grinding base 323.

[0024] Furthermore, a vertical connector 324 is hinged to the back of the grinding base 323. The free end of the vertical connector 324 is inserted into a through hole 325a on the free end of the vertical wall 325. A rectangular hole 325b is provided on the vertical wall 325 through the through hole 325a. The free end of the vertical connector 324 is bolted into the rectangular hole 325b. In this way, the vertical connector 324 can adjust the angle of the grinding base 323 connected to the vertical connector 324 by using the tightness of the bolt and the rectangular hole 325b. The free end of the vertical wall 325 is threaded with a tightening bolt 326, and the tightening bolt 326 extends into the through hole 325a and abuts against the side of the vertical connector 324. In this way, the vertical connector 324 can be pushed and adjusted by the helical rotation displacement of the tightening bolt 326, so as to cope with the subsequent grinding feed adjustment.

[0025] Furthermore, the hinge directions of the vertical connector 324 and the parallel connector 322 are perpendicular to each other, and their center points correspond to the center of the back of the grinding base 323. This allows the parallel connector 322 and the vertical connector 324 to form a centrally symmetrical connection and fixation method for the grinding base 323, thereby ensuring the concentricity of the grinding base 323 during rotation and improving the grinding effect on the outer periphery of the valve core body 6. The vertical connector 324 and the parallel connector 322 are in an outward expansion state with the hinge point on the back of the grinding base 323 as the endpoint.

[0026] Using the above structure, firstly, the valve core body 6 is fitted onto the outer side of the inner support member of the central support mechanism 2. The front push rod 27 is driven to translate into the locating tube 22 by rotating the adjusting screw 210. The end of the front push rod 27 pushes two sets of inner push arc plates 24 to move axially along the locating tube 22. This, in turn, drives the outer support arc plate 23 to expand radially through the connecting plate, ensuring the outer support arc plate 23 tightly fits against the inner hole of the valve core body 6, thus completing the inner support fixation. Next, the rotating motor 26 is started, driving the suspension shaft 21 and the inner support member fixed thereon to rotate synchronously via the coupling, thereby causing the valve core body 6 to rotate around its axis. Then, the swing angle adjustment mechanism 32 is adjusted. First, the connecting bolts in the rectangular hole 325b of the vertical wall 325 are loosened. The contact angle between the grinding base 323 and the outer periphery of the valve core is adjusted to a range of 20°-30° through the hinged engagement of the vertical connecting member 324 and the parallel connecting member 322. After tightening the bolts, the tightening bolt 326 is rotated to finely adjust the grinding feed. Finally, the grinding motor 36 is started, and the power is transmitted to the synchronous shaft 34 through the bevel gear set 36a. The transmission component 33 drives the two sets of transmission shafts 321 to rotate synchronously, so that the two grinding bases 323 perform full-circumferential grinding on the rotating valve core body 6 in a symmetrical support manner. The position of the fixing frame can be adjusted by the waist hole design to adapt to valve cores of different specifications, and finally achieve high-precision and high-efficiency symmetrical grinding processing.

[0027] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part all adopt conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, and is common knowledge in the field. Furthermore, this application is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail here. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented in accordance with conventional methods in the field and relevant national standards.

Claims

1. A grinding fixture for machining a ball valve core, characterized in that: It includes a table frame (1) and a valve core body (6). The table frame (1) is provided with a central support mechanism (2) and a transmission assembly (3). The valve core body (6) is located on the central support mechanism (2) and corresponds to the center of the transmission assembly (3). The table frame (1) is equipped with a switch (4) for controlling the central support mechanism (2) and the transmission assembly (3). The central support mechanism (2) includes a suspension shaft (21) and a front push rod (27). One end of the suspension shaft (21) is provided with an inner support that matches the inner sleeve of the inner hole of the valve core body (6), and the inner support matches the inner sleeve of the through hole on the valve core body (6). The suspension shaft (21) is mounted on the first fixed frame (25) by bearings. The first fixed frame (25) is bolted to the table frame (1). A rotating motor (26) is mounted on the table frame (1). The rotating motor (26) is connected to the other end of the suspension shaft (21) by a coupling.

2. The grinding fixture for machining a ball valve core according to claim 1, characterized in that: The inner support includes a grommet tube (22), an outer support arc plate (23), and an inner push arc plate (24). The inner push arc plate (24) is configured as two pieces, and the two pieces are configured as symmetrical semicircles. The two inner push arc plates (24) are arranged inside the grommet tube (22). The outer support arc plate (23) is set in two pieces, and the two pieces are set in a symmetrical semi-circular shape and located on the outer periphery of the card hole tube (22). The card hole tube (22) has symmetrical card holes, and a connecting plate is slidably connected in the card holes. The connecting plate is fixed between the outer support arc plate (23) and the inner push arc plate (24). The end face of the card hole tube (22) is fixed to one end of the suspension shaft (21).

3. The grinding fixture for machining a ball valve core according to claim 2, characterized in that: The front push rod (27) is rotatably mounted on the translation seat (28), and the translation seat (28) is slidably mounted on the table frame (1). One end of the front push rod (27) is inserted into two inner push arc plates (24) inside the card hole tube (22), and the other end is rotatably engaged with the adjusting screw (210) through the bearing. The adjusting screw (210) is threadedly connected to the second fixed frame (29), and the second fixed frame (29) is bolted to the table frame (1).

4. The grinding fixture for machining a ball valve core according to claim 3, characterized in that: The transmission assembly (3) includes two sets of third fixed frames (31) and a swing angle adjustment mechanism (32) set on the two sets of third fixed frames (31). Both sets of third fixed frames (31) are bolted to the table frame (1). Two sets of transmission components (33) are respectively connected to the two swing angle adjustment mechanisms (32) on opposite sides of the two sets of third fixed frames (31). The lower sides of the two sets of transmission components (33) are respectively connected to the two sides of the synchronous shaft (34). The synchronous shaft (34) is set on the lower side inside the table frame (1) and rotatably mounted on the bearing seat (35). The bearing seat (35) is detachably mounted on the corner plate. Two support leg connecting rods (5) are fixed between the two support legs on one side of the table frame (1). The upper support leg connecting rod (5) is fixedly connected to the corner plate. The bolt connection holes (325a) on the table frame (1) are all designed as waist holes.

5. The grinding fixture for machining a ball valve core according to claim 4, characterized in that: A bevel gear set (36a) is provided at the end of the synchronous shaft (34) corresponding to the support leg connecting rod (5), and the bevel gear set (36a) is connected to the output shaft of the grinding motor (36) installed on the two support leg connecting rods (5).

6. The grinding fixture for machining a ball valve core according to claim 5, characterized in that: The swing angle adjustment mechanism (32) includes a drive shaft (321) and a grinding base (323). The drive shaft (321) is rotatably mounted on the third fixed frame (31) via a bearing. One end of the drive shaft (321) is connected to the transmission component (33), and the other end is fixed with a vertical wall (325). The grinding base (323) is attached to the outer periphery of the valve core body (6), and the grinding base (323) and the transmission shaft (321) on the two sets of swing angle adjustment mechanisms (32) are set at a straight angle between 20° and 30°. The back of the grinding base (323) is hinged to the other side of the transmission shaft (321) with a parallel connector (322).

7. A grinding fixture for machining a ball valve core according to claim 6, characterized in that: A vertical connector (324) is hinged to the back of the grinding base (323). The free end of the vertical connector (324) is inserted into a through hole (325a) on the free end of the vertical wall (325). A rectangular hole (325b) is provided on the vertical wall (325) through the through hole (325a). The free end of the vertical connector (324) is bolted into the rectangular hole (325b). The free end of the vertical wall (325) is threaded with a tightening bolt (326), and the tightening bolt (326) extends into the through hole (325a) and abuts against the side of the vertical connector (324).

8. A grinding fixture for machining a ball valve core according to claim 7, characterized in that: The hinge directions of the vertical connector (324) and the parallel connector (322) are perpendicular to each other, and the center point between them corresponds to the center of the back of the grinding base (323). The vertical connector (324) and the parallel connector (322) are in an outward expansion state with the hinge point on the back of the grinding base (323) as the endpoint.

Images