Concentric valve part mounting platform
By optimizing the structural design of the concentric valve parts mounting platform and combining it with a three-axis moving unit and a measuring probe, the problems of low efficiency and poor accuracy in the existing technology have been solved, and efficient and flexible assembly of concentric valve parts has been achieved.
Patent Information
- Application Number
- CN202520144220.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing concentric valve component mounting platforms are inefficient, have poor precision, and lack production flexibility.
An installation platform comprising a three-axis moving unit, a rotating worktable unit, pneumatic chucks, and a dial indicator was designed. By optimizing the structure and introducing a measuring probe, high-precision coaxiality control and rapid positioning are achieved.
It significantly improves assembly accuracy, shortens assembly cycle, increases production efficiency, and adapts to concentric valve parts of different sizes and shapes, reducing downtime and fixture replacement costs.
Smart Images
Figure CN223903794U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to concentric valve class spare installation field, concretely relates to a concentric valve class spare installation platform. BACKGROUND
[0002] Concentric valve class spare plays an important role in hydraulic system, pneumatic system and various fluid control devices, is responsible for accurately controlling the flow, pressure and direction of fluid, ensures the stable operation and efficient work of system. In order to ensure its sealing, durability and the stability of fluid control performance, the assembly of concentric valve class spare requires high coaxiality and accuracy. At present, common assembly tools include mechanical centering fixture and hydraulic centering fixture. Mechanical centering fixture is stable through positioning pin, slot and fixed bolt, is suitable for occasions with high precision requirements, and can effectively guarantee coaxiality. But this mode has long adjustment period, and each valve body spare needs to customize special fixture, which limits its production flexibility. Hydraulic centering fixture realizes automatic centering through adjusting airflow or liquid pressure, improves assembly efficiency and flexibility, and is suitable for batch production. However, the precision and stability of hydraulic system may not be as good as mechanical fixture, and it has high dependence on energy supply and system maintenance. The current two main assembly tools have advantages and disadvantages, and an efficient and high-precision concentric valve class spare installation platform is urgently needed. SUMMARY
[0003] The utility model discloses a concentric valve class spare installation platform to solve the problem of low efficiency and poor precision of the existing concentric valve class spare installation platform, and further provides a concentric valve class spare installation platform.
[0004] A concentric valve class spare installation platform, the installation platform includes three-axis movement unit, rotary workbench unit, pneumatic dog and dial gauge, the rotary workbench unit is arranged in the three-axis movement unit, and the rotary workbench unit and the three-axis movement unit are fixed on the support plane of the assembly area, the pneumatic dog is installed on the execution end of the three-axis movement unit, and the pneumatic dog is located above the rotary workbench unit, the dial gauge is arranged on the three-axis movement unit, and the dial gauge is adsorbed with the three-axis movement unit, and the dial gauge needle is arranged towards the rotary workbench unit.
[0005] Further, the three-axis moving unit comprises a transverse screw nut sliding block mechanism, a longitudinal sliding rod, a sliding support, two bases, two longitudinal screw nut sliding block mechanisms, and two columns, the two bases are arranged in parallel, each longitudinal screw nut sliding block mechanism is arranged on the top of one base, the length extension direction of the base is the same as that of the longitudinal screw nut sliding block mechanism, each column is arranged on one longitudinal screw nut sliding block mechanism in the vertical direction, and the bottom end of each column is fixedly connected with the sliding part in the longitudinal screw nut sliding block mechanism, the transverse screw nut sliding block mechanism is arranged between the two columns, and the two ends of the transverse screw nut sliding block mechanism are fixedly connected with the side walls of the top ends of the columns, the sliding support is fixed on the sliding part in the transverse screw nut sliding block mechanism, the longitudinal sliding rod is inserted into the sliding support in the vertical direction and is in sliding connection with the sliding support, the pneumatic claw is installed at the bottom end of the longitudinal sliding rod, the rotary workbench unit is located between the two bases, and the rotary workbench is located below the pneumatic claw, and the dial gauge is arranged on the transverse screw nut sliding block mechanism and is in adsorptive connection with the fixed part of the transverse screw nut sliding block mechanism.
[0006] Further, the rotary workbench unit comprises a clamping jaw chuck, a connecting flange, an upper gland, an upper bearing seat, a transmission shaft, a lower gland, a lower bearing seat, a rotary motor, a double-layer platform assembly, a rotary transmission assembly, and two rotary bearings, the upper bearing seat is located on the top of the double-layer platform assembly and is detachably connected with the double-layer platform assembly, one rotary bearing is installed in the upper bearing seat through the upper gland and is detachably connected with the upper bearing seat, the lower bearing seat is located in the double-layer platform assembly and is detachably connected with the double-layer platform assembly, the other rotary bearing is installed in the lower bearing seat through the lower gland and is detachably connected with the lower bearing seat, the transmission shaft is inserted into the double-layer platform assembly in the vertical direction, the top end of the transmission shaft extends above the double-layer platform assembly through the upper bearing seat, the bottom end of the transmission shaft extends below the double-layer platform assembly through the lower bearing seat, the transmission shaft is in rotary connection with the upper bearing seat and the lower bearing seat through the two rotary bearings, the connecting flange is sleeved on the top end of the transmission shaft and is in key connection with the transmission shaft, the clamping jaw chuck is arranged on the top of the connecting flange and is detachably connected with the connecting flange through bolts, the rotary motor is located below the lower bearing seat, and the power output shaft of the rotary motor is in transmission connection with the bottom end of the transmission shaft through the rotary transmission assembly.
[0007] Further, the rotary transmission assembly comprises a large gear and a small gear, the large gear is sleeved on the bottom end of the transmission shaft and is detachably connected with the transmission shaft through a gear gland, and the small gear is sleeved on the power output shaft of the rotary motor and is in transmission connection with the large gear through gear meshing.
[0008] Further, the double-layer platform assembly comprises three double-layer supports arranged equidistantly along the circumference, each double-layer support comprising an L-shaped plate, an upper support plate and a lower support plate, the upper support plate being located at the upper part of the back side of the L-shaped plate and integrally formed at one end of the L-shaped plate, the lower support plate being located below the upper support plate and arranged in parallel with the upper support plate, and one end of the lower support plate being integrally formed with the L-shaped plate, an upper bearing seat being located at the top of the three upper support plates and detachably connected with the three upper support plates by bolts, and a lower bearing seat being located at the top of the three lower support plates and detachably connected with the three lower support plates by bolts;
[0009] Further, the bottom end of the longitudinal slide rod is provided with a distance measuring arrangement hole extending along the axis of the longitudinal slide rod, and a distance measuring assembly is arranged in the distance measuring arrangement hole and installed in the longitudinal slide rod.
[0010] Further, the distance measuring assembly comprises a cylindrical rack, a micro gear, a micro motor, an assembly base and a laser distance measuring probe, the cylindrical rack is arranged in the distance measuring arrangement hole in the vertical direction and is slidably connected with the longitudinal slide rod through a sliding seat, the inner wall of the distance measuring arrangement hole is provided with a mounting hole, the axis of the mounting hole is arranged perpendicularly to the axis of the distance measuring arrangement hole, the micro motor is installed in the mounting hole through the assembly base, the power output shaft of the micro motor extends into the distance measuring arrangement hole, the micro gear is sleeved on the power output shaft of the micro motor and is arranged in tooth engagement with the cylindrical rack, the laser distance measuring probe is arranged at the bottom end of the cylindrical rack, the connecting part of the laser distance measuring probe is threadedly connected with the cylindrical rack, and the probe end of the laser distance measuring probe is arranged vertically downward.
[0011] The beneficial effects of the present application relative to the prior art are:
[0012] 1. The present application provides a concentric valve part mounting platform, which optimizes the structural design of the concentric valve part mounting platform, realizes higher coaxiality and precision guarantee. Compared with the traditional mechanical centering clamp, it can effectively reduce the positioning error in the assembly process, ensure that the concentricity error of the valve body part is controlled within ±0.01mm, and significantly improve the assembly precision and the sealing performance of the parts.
[0013] 2. The present application provides a concentric valve part mounting platform, compared with the traditional mechanical clamp, the assembly platform of the present application adopts a measuring probe, which can complete the positioning of the parts in a shorter time, and the assembly cycle is shortened by about 30%, which improves the production efficiency, especially suitable for batch production.
[0014] 3. The concentric valve part mounting platform provided by the application can adapt to concentric valve parts of different sizes and shapes, has higher flexibility, does not need to be re-customized, and greatly reduces downtime and fixture replacement costs in the production process. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 A structural schematic diagram of the mounting platform described in the application;
[0016] Figure 2 A top view schematic diagram of the mounting platform described in the application;
[0017] Figure 3 A Figure 1 An enlarged view of A in FIG. 4;
[0018] Figure 4 A front view schematic diagram of the double-layer support in the mounting platform described in the application;
[0019] Figure 5 A side view schematic diagram of the double-layer support in the mounting platform described in the application;
[0020] Figure 6 A top view schematic diagram of the double-layer support in the mounting platform described in the application.
[0021] In the figure, 1 is a base, 1-1 is a longitudinal screw nut sliding block mechanism, 2 is a vertical column, 3 is a transverse screw nut sliding block mechanism, 4 is a longitudinal sliding rod, 5 is a sliding support, 6 is a pneumatic claw, 7 is a dial gauge, 8 is a clamping jaw chuck, 8-1 is a jaw, 9 is a connecting flange, 10 is an upper gland, 11 is an upper bearing seat, 12 is a transmission shaft, 13 is a rotating bearing, 14 is a lower gland, 15 is a lower bearing seat, 16 is a double-layer support, 17 is a large gear, 18 is a gear gland, 19 is a small gear, 20 is a motor, 21 is a cylindrical rack, 22 is a micro gear, 23 is a micro motor, 23-1 is a thickened bottom cover, 24 is an assembly base, 25 is a laser ranging probe, and 30 is a reference workpiece. DETAILED DESCRIPTION
[0022] Specific implementation one: combined Figures 1 to 6 In this embodiment, a concentric valve part mounting platform is provided. The mounting platform comprises a three-axis moving unit, a rotating workbench unit, a pneumatic claw 6, and a dial gauge 7. The rotating workbench unit is arranged in the three-axis moving unit, and both the rotating workbench unit and the three-axis moving unit are fixed on a support plane of an assembly area. The pneumatic claw 6 is installed on an execution end of the three-axis moving unit, and the pneumatic claw 6 is located above the rotating workbench unit. The dial gauge 7 is arranged on the three-axis moving unit, and the dial gauge 7 is in suction connection with the three-axis moving unit. The dial gauge 7 is arranged with a needle pointing towards the rotating workbench unit.
[0023] The concentric valve part mounting platform provided by the embodiment can assemble workpieces with a diameter of 50-400mm. The dial gauge 7 is connected to the three-axis moving unit by adsorption, which is convenient for adjusting the position of the dial gauge 7 and removing the dial gauge 7 when measurement is not needed, so as to avoid interference with the movement of each degree of freedom of the three-axis moving unit.
[0024] Specific embodiment two: combination Figures 1 to 6 In the embodiment, the three-axis moving unit includes a transverse screw nut sliding block mechanism 3, a longitudinal sliding rod 4, a sliding support 5, two bases 1, two longitudinal screw nut sliding block mechanisms 1-1, and two vertical columns 2. The two bases 1 are arranged in parallel. Each longitudinal screw nut sliding block mechanism 1-1 is arranged on the top of one base 1, and the length extension direction of the base 1 is the same as that of the longitudinal screw nut sliding block mechanism 1-1. Each vertical column 2 is arranged on one longitudinal screw nut sliding block mechanism 1-1 in the vertical direction, and the bottom end of each vertical column 2 is fixedly connected to the sliding part in the longitudinal screw nut sliding block mechanism 1-1. The transverse screw nut sliding block mechanism 3 is arranged between the two vertical columns 2, and the two ends of the transverse screw nut sliding block mechanism 3 are fixedly connected to the side walls of the top ends of the vertical columns 2. The sliding support 5 is fixed to the sliding part in the transverse screw nut sliding block mechanism 3. The longitudinal sliding rod 4 is inserted into the sliding support 5 in the vertical direction, and the longitudinal sliding rod 4 is slidingly connected to the sliding support 5. The pneumatic clamping jaw 6 is installed at the bottom end of the longitudinal sliding rod 4. The rotating workbench unit is located between the two bases 1, and the rotating workbench is located below the pneumatic clamping jaw 6. The dial gauge 7 is arranged on the transverse screw nut sliding block mechanism 3, and the dial gauge 7 is adsorptively connected to the fixed part of the transverse screw nut sliding block mechanism 3. The other components and connection modes are the same as those of the specific embodiment one.
[0025] In the embodiment, the sliding support 5 is a fixed block. A through hole is processed on the top of the fixed block for inserting the longitudinal sliding rod 4. A sliding seat is arranged in the through hole. The longitudinal sliding rod 4 is slidingly connected to the sliding support 5 through the sliding seat. A driving motor is integrated in the fixed block as a power component for driving the longitudinal sliding rod 4. A driving gear is sleeved on the power output shaft of the driving motor. A driving rack is arranged on the longitudinal sliding rod 4. The driving gear and the driving rack are arranged in tooth engagement. When the driving motor drives the driving gear to rotate forward or reversely, the longitudinal sliding rod 4 can be driven to ascend or descend.
[0026] Specific embodiment three: combination Figures 1 to 2The difference between the embodiment and the second specific embodiment is that the rotating workbench unit comprises a clamping jaw chuck 8, a connecting flange 9, an upper gland 10, an upper bearing seat 11, a transmission shaft 12, a lower gland 14, a lower bearing seat 15, a rotating motor 20, a double-layer platform assembly, a rotating transmission assembly, and two rotating bearings 13. The upper bearing seat 11 is located on the top of the double-layer platform assembly and detachably connected with the double-layer platform assembly. One rotating bearing 13 is installed in the upper bearing seat 11 through the upper gland 10, and the upper gland 10 is detachably connected with the upper bearing seat 11. The lower bearing seat 15 is located in the double-layer platform assembly and detachably connected with the double-layer platform assembly. The other rotating bearing 13 is installed in the lower bearing seat 15 through the lower gland 14, and the lower gland 14 is detachably connected with the lower bearing seat 15. The transmission shaft 12 is inserted in the double-layer platform assembly in the vertical direction, and the top end of the transmission shaft 12 extends above the double-layer platform assembly through the upper bearing seat 11. The bottom end of the transmission shaft 12 extends below the double-layer platform assembly through the lower bearing seat 15. The transmission shaft 12 is rotatably connected with the upper bearing seat 11 and the lower bearing seat 15 through the two rotating bearings 13, respectively. The connecting flange 9 is sleeved on the top end of the transmission shaft 12 and is keyed connected with the transmission shaft 12. The clamping jaw chuck 8 is arranged on the top of the connecting flange 9 and is detachably connected with the connecting flange 9 through bolts. The rotating motor 20 is located below the lower bearing seat 15, and the power output shaft of the rotating motor 20 is drivingly connected with the bottom end of the transmission shaft 12 through the rotating transmission assembly. The other components and connection modes are the same as those of the second specific embodiment.
[0027] Specific embodiment four: combination Figures 1 to 6 The difference between the embodiment and the third specific embodiment is that the rotating transmission assembly comprises a large gear 17 and a small gear 19. The large gear 17 is sleeved on the bottom end of the transmission shaft 12 and is detachably connected with the transmission shaft 12 through a gear gland 18. The small gear 19 is sleeved on the power output shaft of the rotating motor 20, and the large gear 17 and the small gear 19 are drivingly connected in a tooth engagement mode. The other components and connection modes are the same as those of the third specific embodiment.
[0028] Specific embodiment five: combination Figures 1 to 6The difference between the embodiment and the fourth specific embodiment is that the double-layer platform assembly comprises three double-layer supports 16, the three double-layer supports 16 are arranged equidistantly along the circumference in sequence, the double-layer support 16 comprises an L-shaped plate 16-1, an upper support plate 16-2 and a lower support plate 16-3, the upper support plate 16-2 is located at the upper part of the back side of the L-shaped plate 16-1, and one end of the upper support plate 16-2 is integrally formed with the L-shaped plate 16-1, the lower support plate 16-3 is located below the upper support plate 16-2, and the lower support plate 16-3 is arranged in parallel with the upper support plate 16-2, and one end of the lower support plate 16-3 is integrally formed with the L-shaped plate 16-1, the upper bearing seat 11 is located at the top of the three upper support plates 16-2, and the upper bearing seat 11 is detachably connected with the three upper support plates 16-2 through bolts, and the lower bearing seat 15 is located at the top of the three lower support plates 16-3, and the lower bearing seat 15 is detachably connected with the three lower support plates 16-3 through bolts. The other components and connection modes are the same as those in the fourth specific embodiment.
[0029] The sixth specific embodiment is combined with Figures 1 to 6 The difference between the embodiment and the fifth specific embodiment is that a distance measuring arrangement hole is processed at the bottom end of the longitudinal sliding rod 4 along the axis extension direction of the longitudinal sliding rod 4, a distance measuring assembly is arranged in the distance measuring arrangement hole, and the distance measuring assembly is installed in the longitudinal sliding rod 4. The other components and connection modes are the same as those in the fifth specific embodiment.
[0030] The seventh specific embodiment is combined with Figures 1 to 2 The difference between the embodiment and the sixth specific embodiment is that the distance measuring assembly comprises a cylindrical rack 21, a micro gear 22, a micro motor 23, an assembly base 24 and a laser ranging probe 25, the cylindrical rack 21 is arranged in the distance measuring arrangement hole in the vertical direction, and the cylindrical rack 21 is slidably connected with the longitudinal sliding rod 4 through a sliding seat, an installation hole is processed on the inner wall of the distance measuring arrangement hole, and the axis of the installation hole is arranged perpendicularly to the axis of the distance measuring arrangement hole, the micro motor 23 is installed in the installation hole through the assembly base 24, and the power output shaft of the micro motor 23 extends into the distance measuring arrangement hole, the micro gear 22 is sleeved on the power output shaft of the micro motor 23, and the micro gear 22 is arranged in gear meshing with the cylindrical rack 21, the laser ranging probe 25 is arranged at the bottom end of the cylindrical rack 21, and the connecting part of the laser ranging probe 25 is threadedly connected with the cylindrical rack 21, and the probe end of the laser ranging probe 25 is arranged vertically downward. The other components and connection modes are the same as those in the sixth specific embodiment.
[0031] As explained in conjunction with embodiment six and embodiment seven, the distance measuring assembly is an important component of the present application, and its axis is arranged in line with the clamping axis of the pneumatic clamping jaw 6. The distance measuring assembly is used to align the subsequent assembly of the concentric valve part with the reference workpiece 30. The alignment principle is to measure the distance between the laser distance measuring probe 25 and the inner wall of the reference workpiece 30, and to adjust the X-axis and Y-axis directions so that the distance between the laser distance measuring probe 25 and the inner wall of the reference workpiece 30 is equal in the X-axis and Y-axis directions, thereby determining the coaxiality of the subsequent assembly and the reference workpiece 30. In order to improve the installation strength of the micro motor 23, a thickened bottom cover 23-1 is added to the shell of the micro motor 23 in the design, and the thickened bottom cover 23-1 is connected with the assembly base 24 through bolts. The assembly base 24 is transitionally connected with the longitudinal slide rod 4 and is axially positioned, so as to ensure the connection reliability and working stability of the distance measuring assembly.
[0032] The above-mentioned preferred embodiments of the present application have been disclosed, but the present application is not limited thereto. Any person skilled in the art can make some changes or modifications to the above-mentioned disclosed structures and technical contents to obtain equivalent embodiments without departing from the technical solution of the present application. However, any simple modification, equivalent change and modification made to the above-mentioned embodiments according to the technical essence of the present application shall still fall within the scope of the technical solution of the present application.
[0033] Working principle:
[0034] The concentric valve part mounting platform provided by the present application is used to assemble the components according to the connection relationship described in embodiment one to embodiment seven, and then perform the assembly work of the concentric valve part. The specific process is as follows:
[0035] Step 1: The initial position of the pneumatic clamping jaw 6 is set, which is generally suspended above the clamping jaw chuck 8 and concentric with the clamping jaw chuck 8. The pneumatic clamping jaw 6 is moved to the specified position to clamp the reference workpiece 30 by adjusting the Y-axis direction movement of the vertical column 2 on the longitudinal screw nut sliding block mechanism 1-1, the X-axis direction movement of the sliding support 5 on the horizontal screw nut sliding block mechanism 3, and the Z-axis direction movement of the longitudinal slide rod 4 on the sliding support 5. Then, the initial position of the pneumatic clamping jaw 6 is restored.
[0036] Step 2: The reference workpiece 30 clamped by the pneumatic clamping jaw 6 is placed on the clamping jaw chuck 8. At this time, the reference workpiece 30 is approximately concentric with the clamping jaw chuck 8 but has a certain error. The clamping jaw chuck 8 is rotated by starting the rotating motor 20 and through the small gear 19, the large gear 17, the transmission shaft 12 and the connecting flange 9. Then, the reference workpiece 30 is aligned by the dial gauge 7, and the runout is below 0.01 mm. The reference workpiece 30 is clamped by the clamping jaw 8-1 on the clamping jaw chuck 8.
[0037] Step 3: repeat step 1, this time the pneumatic clamping jaw 6 clamps the hollow part that needs to be assembled concentrically with the reference workpiece 30, start the micro motor 23, under the engagement of the micro gear 22 and the cylindrical gear rack 21, the laser ranging probe 25 moves downward until it exceeds the Y direction length of 10mm of the hollow part Y clamped by the pneumatic clamping jaw 6 and stops, the longitudinal slide rod 4 moves downward by a certain distance, measures the distance from the inner wall of the reference workpiece 30 through the laser ranging probe 25, adjusts the X axis and Y axis directions to make the distance from the laser ranging probe 25 to the inner wall of the reference workpiece 30 equal in the X axis and Y axis directions, starts the micro motor 23, under the engagement of the micro gear 22 and the cylindrical gear rack 21, the laser ranging probe 25 moves upward. Then the longitudinal slide rod 4 moves downward to put the hollow part into the reference workpiece 30, at this time the concentricity error of the assembled part with the reference workpiece 30 is within 0.01mm. The subsequent concentric parts to be assembled are similar, until the assembly is completed.
Claims
1. A concentric valve family member installation platform characterized by: The mounting platform comprises a three-axis moving unit, a rotating workbench unit, a pneumatic clamping jaw (6) and a dial gauge (7), the rotating workbench unit is arranged in the three-axis moving unit, and the rotating workbench unit and the three-axis moving unit are both fixed on the support plane of the assembly area, the pneumatic clamping jaw (6) is arranged on the execution end of the three-axis moving unit, and the pneumatic clamping jaw (6) is located above the rotating workbench unit, and the dial gauge (7) is arranged on the three-axis moving unit and is in adsorptive connection with the three-axis moving unit, and the dial gauge (7) is arranged with the dial hand facing the rotating workbench unit.
2. A concentric valve parts mounting platform according to claim 1, characterized in that: The three-axis moving unit comprises a horizontal screw-nut sliding block mechanism (3), a vertical sliding rod (4), a sliding support (5), two bases (1), two vertical screw-nut sliding block mechanisms (1-1) and two vertical columns (2), the two bases (1) are arranged in parallel, each vertical screw-nut sliding block mechanism (1-1) is arranged on the top of one base (1), and the length extension direction of the base (1) is the same as that of the vertical screw-nut sliding block mechanism (1-1), each vertical column (2) is arranged on one vertical screw-nut sliding block mechanism (1-1) in the vertical direction, and the bottom end of each vertical column (2) is fixedly connected with the sliding part in the vertical screw-nut sliding block mechanism (1-1), the horizontal screw-nut sliding block mechanism (3) is arranged between the two vertical columns (2), and the two ends of the horizontal screw-nut sliding block mechanism (3) are fixedly connected with the side walls of the top ends of the vertical columns (2), the sliding support (5) is fixed on the sliding part in the horizontal screw-nut sliding block mechanism (3), the vertical sliding rod (4) is inserted into the sliding support (5) in the vertical direction, and the vertical sliding rod (4) is in sliding connection with the sliding support (5), the pneumatic clamping jaw (6) is arranged at the bottom end of the vertical sliding rod (4), the rotating workbench unit is located between the two bases (1), and the rotating workbench is located below the pneumatic clamping jaw (6), and the dial gauge (7) is arranged on the horizontal screw-nut sliding block mechanism (3) and is in adsorptive connection with the fixed part of the horizontal screw-nut sliding block mechanism (3).
3. A concentric valve parts mounting platform according to claim 1, wherein: The rotating workbench unit comprises a clamping jaw chuck (8), a connecting flange (9), an upper gland (10), an upper bearing seat (11), a transmission shaft (12), a lower gland (14), a lower bearing seat (15), a rotating motor (20), a double-layer platform assembly, a rotating transmission assembly and two rotating bearings (13), the upper bearing seat (11) is located at the top of the double-layer platform assembly and detachably connected with the double-layer platform assembly, one rotating bearing (13) is installed in the upper bearing seat (11) through the upper gland (10) and detachably connected with the upper bearing seat (11), the lower bearing seat (15) is located in the double-layer platform assembly and detachably connected with the double-layer platform assembly, the other rotating bearing (13) is installed in the lower bearing seat (15) through the lower gland (14) and detachably connected with the lower bearing seat (15), the transmission shaft (12) is inserted in the double-layer platform assembly along the vertical direction, the top end of the transmission shaft (12) extends above the double-layer platform assembly through the upper bearing seat (11), the bottom end of the transmission shaft (12) extends below the double-layer platform assembly through the lower bearing seat (15), the transmission shaft (12) is rotatably connected with the upper bearing seat (11) and the lower bearing seat (15) through the two rotating bearings (13), the connecting flange (9) is sleeved on the top end of the transmission shaft (12) and is keyed connected with the transmission shaft (12), the clamping jaw chuck (8) is arranged at the top of the connecting flange (9) and detachably connected with the connecting flange (9) through bolts, the rotating motor (20) is located below the lower bearing seat (15), and the power output shaft of the rotating motor (20) is drivingly connected with the bottom end of the transmission shaft (12) through the rotating transmission assembly.
4. The concentric valve parts mounting platform of claim 2, wherein: The rotating transmission assembly comprises a large gear (17) and a small gear (19), the large gear (17) is sleeved on the bottom end of the transmission shaft (12) and detachably connected with the transmission shaft (12) through a gear gland (18), and the small gear (19) is sleeved on the power output shaft of the rotating motor (20) and drivingly connected with the large gear (17) in a tooth meshing mode.
5. A concentric valve parts mounting platform according to claim 2, wherein: The double-layer platform assembly comprises three double-layer supports (16) arranged equidistantly along the circumference, the double-layer support (16) comprises an L-shaped plate (16-1), an upper support plate (16-2) and a lower support plate (16-3), the upper support plate (16-2) is located at the upper part of the back side of the L-shaped plate (16-1), and one end of the upper support plate (16-2) is integrally formed with the L-shaped plate (16-1), the lower support plate (16-3) is located below the upper support plate (16-2), and the lower support plate (16-3) is arranged in parallel with the upper support plate (16-2), and one end of the lower support plate (16-3) is integrally formed with the L-shaped plate (16-1), the upper bearing seat (11) is located at the top of the three upper support plates (16-2), and the upper bearing seat (11) is detachably connected with the three upper support plates (16-2) through bolts, and the lower bearing seat (15) is located at the top of the three lower support plates (16-3), and the lower bearing seat (15) is detachably connected with the three lower support plates (16-3) through bolts.
6. A concentric valve parts mounting platform according to claim 2, characterized in that: The bottom end of the longitudinal slide rod (4) is provided with a distance measuring arrangement hole extending along the axis direction of the longitudinal slide rod (4), and a distance measuring assembly is arranged in the distance measuring arrangement hole and installed in the longitudinal slide rod (4).
7. A concentric valve parts mounting platform according to claim 1, characterized in that: The distance measuring assembly comprises a cylindrical rack (21), a micro gear (22), a micro motor (23), an assembly base (24) and a laser distance measuring probe (25), the cylindrical rack (21) is arranged in the distance measuring arrangement hole in the vertical direction, and the cylindrical rack (21) is slidably connected with the longitudinal slide rod (4) through a sliding seat, an installation hole is formed on the inner wall of the distance measuring arrangement hole, and the axis of the installation hole is arranged perpendicularly to the axis of the distance measuring arrangement hole, the micro motor (23) is installed in the installation hole through the assembly base (24), and the power output shaft of the micro motor (23) extends into the distance measuring arrangement hole, the micro gear (22) is sleeved on the power output shaft of the micro motor (23), and the micro gear (22) is arranged in tooth engagement with the cylindrical rack (21), the laser distance measuring probe (25) is arranged at the bottom end of the cylindrical rack (21), and the connecting part of the laser distance measuring probe (25) is threadedly connected with the cylindrical rack (21), and the probe end of the laser distance measuring probe (25) is arranged vertically downward.