A tooling for machining the shaft seal of a split-type pump valve

Abstract

This invention relates to the field of assembly and disassembly fixtures, and discloses a tooling for machining a split-type pump valve shaft seal. The tooling includes a base, on which a grinding component and a positioning component are mounted for positioning and grinding the end face of the split-type pump valve shaft seal. This invention uses multiple traction seats to place the split-type pump valve shaft seal. A locking structure simultaneously drives multiple traction seats to move horizontally, clamping and positioning the split-type pump valve shaft seal along different radial directions via positioning blocks on the top of the traction seats. Because the locking structure can control multiple traction seats simultaneously, precise positioning of the split-type pump valve shaft seal can be achieved. Furthermore, through the arrangement of the driving component and the sliding component, the grinding component can be gradually driven closer to the split-type pump valve shaft seal during positioning. When placing the split-type pump valve shaft seal, the grinding component is kept away from the worker's hands to prevent hand injury.

Description

Technical Field

[0001] This invention relates to the field of disassembly and assembly fixtures, specifically to a tooling for machining the shaft seal of a split-type pump valve. Background Technology

[0002] Split-type pumps and valves are a type of pump or valve whose core components are designed with a detachable, segmented structure. Essentially, they are designed by splitting traditional integral key components, such as the pump body, valve disc, shaft seal, and impeller, into two or more segments, commonly two or four segments. This solves the problems of integral pumps and valves in scenarios such as large-scale operation, installation and maintenance, and adaptation to irregular working conditions, while ensuring the sealing and mechanical performance of fluid transportation or interception. Among them, the shaft sleeve is the core supporting component of the split-type pump and valve shaft seal. The shaft seal processing of split-type pumps and valves involves multiple precision processes, especially the grinding of the shaft seal end face, which requires the use of special fixtures for positioning and clamping to facilitate grinding processing.

[0003] The prior art provides a tooling for press-fitting hydraulic shaft seals and dust seals, application number CN202510851285.8. It can simultaneously press-fit shaft seals and dust seals, improving press-fitting efficiency and quality. It includes a lower press head mounted on the press base plate and an upper press head connected to the press head. The top of the lower press head is provided with a lower cylindrical protrusion, and a guide post is provided in the middle of the lower cylindrical protrusion. An upper press head guide sleeve is slidably fitted on the upper press head. The bottom of the upper press head has a guide countersunk hole in the middle that mates with the guide post, and a circular pressure plate is provided on the outer circumference. The bottom of the circular pressure plate is provided with an upper annular protrusion.

[0004] However, the tooling used for shaft seal machining in the existing technology still has the following drawbacks:

[0005] When positioning a shaft seal using machining fixtures, multiple grippers are often used to clamp and fix the shaft seal from different directions. These grippers are mostly controlled by independent power sources. If one of the power sources deviates, the positioning process of the shaft seal will be affected, resulting in the shaft seal not being accurately positioned. This reduces the quality of subsequent end face grinding. Furthermore, when fixing the shaft seal on the fixture, the operator's hands will be very close to the grinding device, which can easily cause injury to the operator's hands. Summary of the Invention

[0006] The purpose of this invention is to provide a technical solution that places a split-type pump valve shaft seal using multiple traction seats, and simultaneously drives multiple traction seats to move horizontally through a locking structure, so that the positioning block on the top of the traction seat clamps and positions the split-type pump valve shaft seal along different radial directions. Since the locking structure can control multiple traction seats at the same time, it can achieve precise positioning of the split-type pump valve shaft seal, thereby solving the problems in the prior art mentioned in the background.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A tooling for machining a split-type pump valve shaft seal includes a base, on which a grinding assembly and a positioning assembly are provided for positioning and grinding the end face of the split-type pump valve shaft seal. The positioning assembly includes a positioning block, a center plate, and a traction seat. The positioning block is fixedly connected to the traction seat, and the center plate is fixedly connected to the base. At least three traction seats are evenly distributed and horizontally slidably connected to the center plate. The split-type pump valve shaft seal is placed on multiple traction seats and coaxially located above the center plate. The sides of the multiple positioning blocks abut against the sides of the split-type pump valve shaft seal.

[0009] The positioning assembly also includes a locking structure, which is disposed on the central plate and cooperates with multiple traction seats to drive the multiple traction seats to move elastically along the radial direction of the central plate at the same time, thereby positioning the split pump valve shaft seal through the multiple positioning blocks.

[0010] The base is also provided with a drive component and a sliding component. The drive component is connected to the locking structure, and the grinding component is connected to the drive component through the sliding component. The drive component is used to drive the locking structure to position the split pump valve shaft seal. At the same time, when the drive component is in operation, it also drives the grinding component to approach the split pump valve shaft seal and grind its end face through the sliding component.

[0011] Preferably, the locking structure includes an adjusting disc, limiting protrusions, and inclined grooves. The adjusting disc is coaxially rotatably connected to the bottom of the central disc. A plurality of limiting protrusions are evenly fixedly disposed on the inner wall of the adjusting disc. A plurality of inclined grooves are evenly opened on the inner wall of the adjusting disc, and the limiting protrusions and inclined grooves are staggered. Both the inclined grooves and the limiting protrusions cooperate with the traction seat.

[0012] Preferably, the positioning component further includes a spherical traction block, which is fixedly connected to the side of the traction seat, and the spherical end of the spherical traction block abuts against the surface of the inclined groove.

[0013] Preferably, the positioning assembly further includes a fixed rod, a movable rod, and a spring. The fixed rod is fixedly connected to the side of the central disc, one end of the movable rod is slidably connected to the inside of the fixed rod along the axial direction, the other end of the movable rod is fixedly connected to the traction seat, and the spring is fixedly connected between the fixed rod and the traction seat and sleeved on the surface of the movable rod.

[0014] Preferably, the positioning component further includes a stop block, which is fixedly connected to the traction seat. The stop block is located at one end of the traction seat, and the side of the stop block near the split pump valve shaft seal is set as an inclined surface.

[0015] Preferably, the drive assembly includes a worm gear and a worm, the worm being mounted on a base, and the worm gear being coaxially and fixedly connected to the bottom of a central disk, with the worm gear cooperating with the worm.

[0016] Preferably, the sliding assembly includes a rotating shaft, a first hinge rod, a second hinge rod, and a movable seat. The movable seat is horizontally slidably connected to the base, the rotating shaft is rotatably connected to the base, the worm gear is fixedly installed on the rotating shaft, one end of the first hinge rod is fixedly connected to the rotating shaft, the other end of the first hinge rod is hinged to one end of the second hinge rod, the other end of the second hinge rod is hinged to the movable seat, and the grinding assembly is disposed on the top of the movable seat.

[0017] Preferably, the sliding assembly further includes a limiting rod, at least one of the limiting rods being fixedly connected to the base, and the movable seat being slidably connected to the movable seat along the axial direction.

[0018] Preferably, the grinding assembly includes a traction arm, a motor, and a grinding disc. The traction arm is vertically slidably connected to the movable seat, the motor is fixedly connected to the traction arm, and the grinding disc is fixedly connected to the output end of the motor.

[0019] Preferably, the grinding assembly further includes a guide rod and an electric push rod, both of which are vertically fixedly connected to the movable seat. The output end of the electric push rod is fixedly connected to the traction arm, and the traction arm is slidably connected to the guide rod along the axial direction.

[0020] Technical effects and advantages of the present invention: The tooling for machining the shaft seal of a split-type pump valve proposed in this invention has the following advantages compared with the prior art:

[0021] This invention places a split-type pump valve shaft seal using multiple traction seats. A locking structure simultaneously drives multiple traction seats to move horizontally, clamping and positioning the split-type pump valve shaft seal along different radial directions using positioning blocks on the top of the traction seats. Since the locking structure can control multiple traction seats simultaneously, precise positioning of the split-type pump valve shaft seal can be achieved. Furthermore, through the arrangement of the drive component and the sliding component, the grinding component can be gradually driven closer to the split-type pump valve shaft seal during positioning. When placing the split-type pump valve shaft seal, the grinding component is kept away from the operator's hands to prevent hand injury.

[0022] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention can be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the main structure of the present invention;

[0024] Figure 2 This is a schematic diagram showing the positioning of the split-type pump valve shaft seal of the present invention;

[0025] Figure 3 This is a schematic diagram of the main structure of the positioning component of the present invention;

[0026] Figure 4 This is a schematic diagram of the connection structure between the traction seat and the central disk of the present invention;

[0027] Figure 5 This is a schematic diagram of the main structure of the driving component of the present invention;

[0028] Figure 6 This is a schematic diagram of the main structure of the locking structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the main structure of the sliding component of the present invention.

[0030] In the diagram: 1. Base; 2. Split-type pump valve shaft seal; 3. Grinding assembly; 31. Traction arm; 32. Guide rod; 33. Electric push rod; 34. Motor; 35. Grinding disc; 4. Positioning assembly; 41. Positioning block; 42. Locking structure; 421. Adjusting disc; 422. Limiting protrusion; 423. Inclined groove; 43. Center disc; 44. Traction seat; 45. Fixed rod; 46. Stop block; 47. Spherical traction block; 48. Movable rod; 49. Spring; 5. Drive assembly; 51. Worm gear; 52. Worm; 6. Sliding assembly; 61. Rotating shaft; 62. First hinge rod; 63. Second hinge rod; 64. Movable seat; 65. Limiting rod. Detailed Implementation

[0031] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0032] like Figures 1 to 7As shown, the present invention provides a tooling for machining a split-type pump valve shaft seal, including a base 1. A grinding assembly 3 and a positioning assembly 4 are mounted on the base 1 for positioning and grinding the end face of the split-type pump valve shaft seal 2. The positioning assembly 4 includes a positioning block 41, a center plate 43, and traction seats 44. The positioning block 41 is fixedly connected to the traction seat 44, and the center plate 43 is fixedly connected to the base 1. The three traction seats 44 are evenly distributed and horizontally slidably connected to the center plate 43. The split-type pump valve shaft seal 2 is placed on the multiple traction seats 44 and coaxially positioned above the center plate 43. The sides of the multiple positioning blocks 41 abut against the sides of the split-type pump valve shaft seal 2. The positioning assembly 4 also includes a locking mechanism. Structure 42, the locking structure 42 is set on the central plate 43 and cooperates with multiple traction seats 44 at the same time to drive the multiple traction seats 44 to move radially elastically along the central plate 43 at the same time, thereby positioning the split pump valve shaft seal 2 through multiple positioning blocks 41. The base 1 is also provided with a drive assembly 5 and a sliding assembly 6. The drive assembly 5 is connected to the locking structure 42. The grinding assembly 3 is connected to the drive assembly 5 through the sliding assembly 6. The drive assembly 5 is used to drive the locking structure 42 to achieve the positioning of the split pump valve shaft seal 2. At the same time, when the drive assembly 5 is in operation, it also drives the grinding assembly 3 to approach the split pump valve shaft seal 2 for end face grinding through the sliding assembly 6.

[0033] Please see Figures 1 to 2 After the drive component 5 is started, it first acts on the locking structure 42, causing multiple traction seats 44 to synchronously and evenly retract radially towards the center, thereby accurately centering and clamping the split pump valve shaft seal 2 placed on it through the positioning block 41. When the clamping action is completed, the drive component 5 continues to move, and pushes the grinding component 3 smoothly towards the fixed split pump valve shaft seal 2 through the sliding component 6 to start the end face grinding operation.

[0034] The locking structure 42 includes an adjusting plate 421, a limiting protrusion 422, and a slanted groove 423. The adjusting plate 421 is coaxially rotatably connected to the bottom of the central plate 43. Multiple limiting protrusions 422 are evenly fixedly arranged on the inner wall of the adjusting plate 421. Multiple slanted grooves 423 are evenly opened on the inner wall of the adjusting plate 421, and the limiting protrusions 422 and the slanted grooves 423 are staggered. Both the slanted grooves 423 and the limiting protrusions 422 cooperate with the traction seat 44.

[0035] Please see Figure 6When the adjusting disk 421 is driven to rotate by the driving component 5, the components on the stationary traction seat 44 will move on the inclined surface of the inclined groove 423. Since the inclined groove 423 is inclined relative to the center of the adjusting disk 421, its rotational motion will be converted into a drive for the radial motion of the traction seat 44. The limiting protrusion 422 is arranged alternately with the inclined groove 423, which plays a limiting and stabilizing role between two motion cycles. The limiting protrusion 422 provides the maximum range of movement of the traction seat 44 on the inclined groove 423, so that the traction seat 44 cannot exceed this range.

[0036] The positioning component 4 also includes a spherical traction block 47, which is fixedly connected to the side of the traction seat 44, and the spherical end of the spherical traction block 47 abuts against the surface of the inclined groove 423.

[0037] Please see Figure 3 and Figure 4 When the adjusting disk 421 rotates, the wall of the inclined groove 423 will slide relative to the spherical traction block 47, thereby pushing the spherical traction block 47 to move radially along the central disk 43. This causes the head of the traction seat 44 to move through the spherical traction block 47. The spherical design at one end of the spherical traction block 47 optimizes the contact method from possible sliding friction to point contact or near-point contact, greatly reducing frictional resistance and making the movement smoother.

[0038] The positioning assembly 4 also includes a fixed rod 45, a movable rod 48, and a spring 49. The fixed rod 45 is fixedly connected to the side of the central disk 43. One end of the movable rod 48 is slidably connected to the inside of the fixed rod 45 along the axial direction, and the other end of the movable rod 48 is fixedly connected to the traction seat 44. The spring 49 is fixedly connected between the fixed rod 45 and the traction seat 44 and is sleeved on the surface of the movable rod 48.

[0039] Please see Figure 3 and Figure 4 When the adjusting disc 421 drives the traction seat 44 to move toward the center of the central disc 43 to clamp the split pump valve shaft seal 2 through the cooperation of the inclined groove 423 and the spherical traction block 47, the spring 49 is compressed and stores energy. When it is necessary to release the split pump valve shaft seal 2, the locking structure 42 releases the constraint on the traction seat 44, the compressed spring 49 releases energy, and pushes the traction seat 44 to slide radially outward along the guide mechanism composed of the movable rod 48 and the fixed rod 45, and automatically resets to the open state.

[0040] The positioning component 4 also includes a stop 46, which is fixedly connected to the traction seat 44. The stop 46 is located at one end of the traction seat 44, and the side of the stop 46 near the split pump valve shaft seal 2 is set as an inclined surface.

[0041] Please see Figure 4When the operator initially places the split-type pump valve shaft seal 2 onto the multiple traction seats 44, the lower end of the split-type pump valve shaft seal 2 will first contact the inclined surfaces of these inclined blocks 46. Under the action of gravity, the split-type pump valve shaft seal 2 will automatically slide along the inclined surface and sit on the central support surface composed of multiple blocks 46, realizing the initial axial positioning and radial alignment of the split-type pump valve shaft seal 2.

[0042] The drive assembly 5 includes a worm gear 51 and a worm 52. The worm 52 is mounted on the base 1, and the worm gear 51 is coaxially and fixedly connected to the bottom of the central disk 43. The worm gear 51 and the worm 52 cooperate with each other.

[0043] Please see Figure 5 After the operator rotates the worm 52, it drives the worm wheel 51 that meshes with it to rotate. The rotation of the worm wheel 51 directly drives the adjustment plate 421 to rotate, which in turn causes the adjustment plate 421 to drive the traction seat 44 and the positioning block 41 to move through the cooperation of the inclined groove 423 and the spherical traction block 47, so as to realize the positioning of the split pump valve shaft seal 2 by multiple positioning blocks 41. During the grinding process of the split pump valve shaft seal 2, no matter how much cutting force the split pump valve shaft seal 2 is subjected to, it cannot drive the worm wheel 51 and the worm 52 in the opposite direction, thus ensuring that the clamping state of the split pump valve shaft seal 2 will not be accidentally loosened.

[0044] The sliding assembly 6 includes a rotating shaft 61, a first hinge rod 62, a second hinge rod 63, and a movable seat 64. The movable seat 64 is horizontally slidably connected to the base 1. The rotating shaft 61 is rotatably connected to the base 1. The worm gear 52 is fixedly installed on the rotating shaft 61. One end of the first hinge rod 62 is fixedly connected to the rotating shaft 61. The other end of the first hinge rod 62 is hinged to one end of the second hinge rod 63. The other end of the second hinge rod 63 is hinged to the movable seat 64. The grinding assembly 3 is located on the top of the movable seat 64.

[0045] Please see Figure 7 When the operator drives the worm gear 52 to rotate, the rotating shaft 61 rotates synchronously, causing the first hinge rod 62 fixed on it to swing. The first hinge rod 62 pushes the second hinge rod 63 through the hinge point. The second hinge rod 63 then pushes the movable seat 64 to slide horizontally on the base 1, thereby realizing the advance and retreat of the grinding component 3. Before the operator places the split-type pump valve shaft seal 2 on the multiple traction seats 44, the grinding component 3 is far away from the central plate 43. At this time, the operator can safely place the split-type pump valve shaft seal 2 on the multiple traction seats 44. After rotating the worm gear 52, the multiple positioning blocks 41 can move the grinding component 3 closer to the split-type pump valve shaft seal 2 through the sliding component 6 while positioning the split-type pump valve shaft seal 2, so as to grind its end face.

[0046] The sliding assembly 6 also includes a limiting rod 65, two limiting rods 65 are fixedly connected to the base 1, and the movable seat 64 is slidably connected to the movable seat 64 along the axial direction.

[0047] Please see Figure 7 When the sliding component 6 pushes the movable seat 64, the limiting rod 65 provides precise linear motion guidance for the movable seat 64, restricting it to move only in a direction parallel to the axis of the limiting rod 65, preventing swaying or jamming.

[0048] The grinding assembly 3 includes a traction arm 31, a motor 34, and a grinding disc 35. The traction arm 31 is vertically slidably connected to the movable seat 64, the motor 34 is fixedly connected to the traction arm 31, and the grinding disc 35 is fixedly connected to the output end of the motor 34. The grinding assembly 3 also includes a guide rod 32 and an electric push rod 33. Both the electric push rod 33 and the guide rod 32 are vertically fixedly connected to the movable seat 64. The output end of the electric push rod 33 is fixedly connected to the traction arm 31, and the traction arm 31 is slidably connected to the guide rod 32 along the axial direction.

[0049] Please see Figure 7 After the motor 34 starts, it drives the grinding disc 35 to rotate at high speed, generating grinding ability. By controlling the vertical position of the traction arm 31, the height of the grinding disc 35 can be adjusted so that it is aligned with the end face of the split pump valve shaft seal 2. The electric push rod 33 serves as the power source to precisely control the lifting and lowering of the traction arm 31. The guide rod 32 serves as the guide to ensure that the lifting and lowering process of the grinding disc 35 is smooth and without shaking.

[0050] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A tooling for machining a split-type pump valve shaft seal, comprising a base (1), wherein a grinding assembly (3) and a positioning assembly (4) are provided on the base (1) for positioning and grinding the end face of the split-type pump valve shaft seal (2), characterized in that, The positioning component (4) includes a positioning block (41), a central disk (43), and a traction seat (44). The positioning block (41) is fixedly connected to the traction seat (44), and the central disk (43) is fixedly connected to the base (1). At least three traction seats (44) are evenly distributed and horizontally slidably connected to the central disk (43). The split-type pump valve shaft seal (2) is placed on multiple traction seats (44) and coaxially located above the central disk (43). The sides of multiple positioning blocks (41) abut against the sides of the split-type pump valve shaft seal (2). The positioning component (4) also includes a locking structure (42), which is set on the central disk (43) and cooperates with multiple traction seats (44) to drive multiple traction seats (44) to move radially elastically along the central disk (43) at the same time, thereby positioning the split pump valve shaft seal (2) through multiple positioning blocks (41). The base (1) is also provided with a drive component (5) and a sliding component (6). The drive component (5) is connected to the locking structure (42), and the polishing component (3) is connected to the drive component (5) through the sliding component (6).

2. The tooling for machining a split-type pump valve shaft seal according to claim 1, characterized in that, The locking structure (42) includes an adjusting plate (421), a limiting protrusion (422), and a slanted groove (423). The adjusting plate (421) is coaxially rotatably connected to the bottom of the central plate (43). A plurality of the limiting protrusions (422) are evenly fixedly arranged on the inner wall of the adjusting plate (421). A plurality of the slanted grooves (423) are evenly opened on the inner wall of the adjusting plate (421), and the limiting protrusions (422) and the slanted grooves (423) are staggered. The slanted grooves (423) and the limiting protrusions (422) are both engaged with the traction seat (44).

3. The tooling for machining a split-type pump valve shaft seal according to claim 2, characterized in that, The positioning component (4) also includes a spherical traction block (47), which is fixedly connected to the side of the traction seat (44), and the spherical end of the spherical traction block (47) abuts against the surface of the inclined groove (423).

4. The tooling for machining a split-type pump valve shaft seal according to claim 3, characterized in that, The positioning assembly (4) also includes a fixed rod (45), a movable rod (48), and a spring (49). The fixed rod (45) is fixedly connected to the side of the central disc (43). One end of the movable rod (48) is axially slidably connected to the inside of the fixed rod (45). The other end of the movable rod (48) is fixedly connected to the traction seat (44). The spring (49) is fixedly connected between the fixed rod (45) and the traction seat (44) and is sleeved on the surface of the movable rod (48).

5. The tooling for machining a split-type pump valve shaft seal according to claim 1, characterized in that, The positioning component (4) also includes a stop (46), which is fixedly connected to the traction seat (44). The stop (46) is located at one end of the traction seat (44), and the side of the stop (46) near the split pump valve shaft seal (2) is set as an inclined surface.

6. The tooling for machining a split-type pump valve shaft seal according to claim 1, characterized in that, The drive assembly (5) includes a worm gear (51) and a worm (52). The worm (52) is mounted on the base (1), and the worm gear (51) is coaxially fixedly connected to the bottom of the central disk (43). The worm gear (51) and the worm (52) cooperate with each other.

7. The tooling for machining a split-type pump valve shaft seal according to claim 6, characterized in that, The sliding assembly (6) includes a rotating shaft (61), a first hinge rod (62), a second hinge rod (63), and a movable seat (64). The movable seat (64) is horizontally slidably connected to the base (1). The rotating shaft (61) is rotatably connected to the base (1). The worm gear (52) is fixedly installed on the rotating shaft (61). One end of the first hinge rod (62) is fixedly connected to the rotating shaft (61). The other end of the first hinge rod (62) is hinged to one end of the second hinge rod (63). The other end of the second hinge rod (63) is hinged to the movable seat (64). The grinding assembly (3) is located on the top of the movable seat (64).

8. The tooling for machining a split-type pump valve shaft seal according to claim 7, characterized in that, The sliding assembly (6) also includes a limiting rod (65), at least one of the limiting rods (65) is fixedly connected to the base (1), and the movable seat (64) is slidably connected to the movable seat (64) along the axial direction.

9. The tooling for machining a split-type pump valve shaft seal according to claim 7, characterized in that, The grinding assembly (3) includes a traction arm (31), a motor (34) and a grinding disc (35). The traction arm (31) is vertically slidably connected to the movable seat (64). The motor (34) is fixedly connected to the traction arm (31). The grinding disc (35) is fixedly connected to the output end of the motor (34).

10. The tooling for machining a split-type pump valve shaft seal according to claim 9, characterized in that, The grinding assembly (3) also includes a guide rod (32) and an electric push rod (33). The electric push rod (33) and the guide rod (32) are both vertically fixedly connected to the movable seat (64). The output end of the electric push rod (33) is fixedly connected to the traction arm (31), and the traction arm (31) is axially slidably connected to the guide rod (32).

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